Patent Publication Number: US-10783206-B2

Title: Method and system for recommending text content, and storage medium

Description:
RELATED APPLICATION 
     This application is a continuation of International Application No. PCT/CN2017/088969, filed on Jun. 19, 2017, which claims priority to Chinese Patent Application No. 201610539075.6, entitled “METHOD AND SYSTEM FOR RECOMMENDING TEXT INFORMATION” filed with the Patent Office of China on Jul. 7, 2016. The entire disclosures of the prior applications are hereby incorporated by reference in their entirety. 
    
    
     FIELD OF THE TECHNOLOGY 
     This application relates to the field of computer technologies, and in particular, to a method and a system for recommending text content, and a storage medium. 
     BACKGROUND OF THE DISCLOSURE 
     With the development of Internet technologies, more data (including: texts, pictures, audios, videos, and the like) is pushed to various users through the Internet. For example, when a user is browsing a web page by using a terminal device such as a mobile phone or a PC, the user will receive various types of data pushed by a network side, such as an advertisement in a picture or video format, public service promotion information, and news. In this way, the user may learn current information and content of interest in time. Such types of data may be referred to as push information or push media content. 
     SUMMARY 
     A method for information recommendation is described. Processing circuitry of an information processing apparatus obtains a first text content based on which a recommendation is to be provided. The processing circuitry segments the first text content into multiple words, and predicts a distribution of the first text content in a multi-dimensional topic space based on the multiple words. Further, the processing circuitry calculates a correlation between the first text content and a second text content in an information pool according to the distribution of the first text content in the multi-dimensional topic space. Then, the processing circuitry determines whether to output the second text content as the recommendation associated with the first text content according to the correlation. 
     In some embodiments, to predict the distribution of the first text content in the multi-dimensional topic space, the processing circuitry uses a Latent Dirichlet Allocation (LDA) model. 
     Further, in an example, the processing circuitry calculates correlations respectively between the first text content and multiple second text contents in the information pool according to the distribution of the first text content in the multi-dimensional topic space. The processing circuitry sorts the multiple second text contents according to the correlations and outputs one or more of the second text contents according to the sorting. 
     To calculate the correlation between the first text content and the second text content, in an embodiment, the processing circuitry calculates the correlation as a function of a cosine distance between the first text content and the second text content in the multi-dimensional topic space. In an example, the processing circuitry calculates the correlation between the first text content and the second text content according to a formula: 
               S   ⁡     (     x   ,     x   ′     ,   v   ,   t     )       =         ∑     k   =   1     n     ⁢       x   k     ⁢     x   k   ′                 ∑     k   =   1     n     ⁢     x   k   2         ⁢         ∑     k   =   1     n     ⁢     x   k     ′   ⁢           ⁢   2                     
where x is used to represent first vectors of the first text content in the multi-dimensional topic space according to a Latent Dirichlet Allocation (LDA) model, x′ is used to represent second vectors of the second text content in the multi-dimensional topic space according to the LDA model, and k is used to represent indexes for the first vectors and the second vectors in summations,
 
                 ∑     k   =   1     n     ⁢       x   k     ⁢     x   k   ′                 ∑     k   =   1     n     ⁢     x   k   2         ⁢         ∑     k   =   1     n     ⁢     x   k     ′   ⁢           ⁢   2                   
is used to calculate the cosine distance between the first text content and the second text content in the multi-dimensional topic space.
 
     In another embodiment, the processing circuitry calculates the correlation between the first text content and the second text content according to a cosine distance between the first text content and the second text content in the multi-dimensional topic space, a page view (PV) weight of the second text content and an overdue penalty of the second text content. In an example, the PV weight of the second text content that is determined according to a click rate of the second text content; and the overdue penalty is determined according to a released time from an initial release of the second text content. 
     According to an aspect of the disclosure, the processing circuitry collects a new piece of information, and obtaining text content of the new piece of information as a new second text content. Then, the processing circuitry segments the new second text content into multiple words, predicts a distribution of the new second text content in the multi-dimensional topic space; and places the new second text content into the information pool. 
     An apparatus for information recommendation is also described. The apparatus includes interface circuitry and processing circuitry. The interface circuitry is configured to receive and transmit signals carrying information. The processing circuitry is configured to obtain a first text content based on which to provide recommendation, segment the first text content into multiple words, predict a distribution of the first text content in a multi-dimensional topic space based on the multiple words, calculate a correlation between the first text content and a second text content in an information pool according to the distribution of the first text content in the multi-dimensional topic space, and determine whether to output the second text content as a recommendation associated with the first text content according to the correlation. 
     Aspects of the disclosure also provide a non-transitory computer-readable medium storing instructions which when executed by a computer cause the computer to perform the method for information recommendation. 
     In order to make the foregoing and other objectives, features, and advantages of this application more comprehensible, exemplary embodiments are described in detail below with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an application environment diagram of a method and a system for recommending text content according to embodiments of this application; 
         FIG. 2  is a structural block diagram of a terminal device in  FIG. 1 ; 
         FIG. 3  is a structural block diagram of a server in  FIG. 1 ; 
         FIG. 4  is a schematic flowchart of a method for recommending text content according to an embodiment of this application; 
         FIG. 5  is a schematic flowchart of main steps of step S 10  in  FIG. 4 ; 
         FIG. 6  is a schematic flowchart of main steps of step S 14  in  FIG. 4 ; and 
         FIG. 7  is a schematic flowchart of a method for recommending text content according to another embodiment of this application. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     In further explain technical means adopted in this application for achieving predetermined objectives and effects thereof, specific implementations, structures, features, and effects of this application are explained below in detail with reference to the accompanying drawings and embodiments. 
     With the rapid development of the Internet, network information pushed to users is growing increasingly. This makes it convenient for network users to obtain information, and also causes an information overload problem. How to rapidly and effectively search and position needed information from enormous amounts of information becomes a major problem in the current Internet development, and is also a hotspot of the retrieval research of the network information. 
     To resolve the foregoing problem, in some embodiments, many news websites recommend, to users by using an information recommendation manner such as “related news”, “related reading”, “more news”, “related recommendation”, and “extended reading”, other information related to news currently displayed on terminals of the users, as expanded reading. At present, information is mostly recommended based on a text TAG recommendation manner: keywords of an information text are extracted and articles are aggregated by using the keywords as indexes, and corresponding articles are indexed according to the keywords during information recommendation. This recommendation manner may have a series of problems as follows: 
     Problems of semantic ambiguity and semantic relativity of related information cannot be resolved. For example, although two pieces of information “Fuji apples are really good, hurry to buy” and “Apple iphone6 is really good, hurry to buy”, are related in word meaning, but are not related semantically. For another example, although the two pieces of information “If time is back to 2006, would Ma Yun and Yang Zhiyuan shake hands” and “Alibaba Group and Yahoo signed a final protocol on share repurchase” are not related in word meaning, but are related semantically. 
     Because the information heat and the timeliness are not considered, user experience is poor. For example, “84-year-old Murdoch engaged with 59-year-old former super model” and “Priscilla effect VS Wendi Deng rule, there must be a real encounter” and “Asset preservation Ding Yuan and inheritance FO revealing: Family trust that Wendi Deng also cannot defeat”, the latter two pieces of information are obviously not related to “Murdoch” in the current case. 
     In view of this, the embodiments of this application provides a method for recommending text content and a corresponding system, that is, a method for recommending text information and a corresponding system. 
     Referring to  FIG. 1 ,  FIG. 1  is an application environment diagram of a method and a system for recommending text content, that is, text information according to the embodiments of this application. As shown in  FIG. 1 , a terminal device  100  installed with a browser client is connected to a server  200  through a network, the server  200  is connected to a database  300 , the database  300  is configured to store various types of data, such as an information recommendation pool and a model base (such as a Latent Dirichlet Allocation (LDA) model base) in this application, and the database  300  may be independent of the server  200 , or may be disposed in the server  200 . The terminal device  100  may be various electronic apparatuses, such as a personal computer, a notebook computer, a tablet computer, and a mobile phone. The network includes, but is not limited to, the Internet, an intranet, a local area network, a mobile communications network, and a combination thereof. 
     Referring to  FIG. 2 ,  FIG. 2  shows a structural block diagram of an embodiment of the terminal device  100 . As shown in  FIG. 2 , the terminal device  100  may include a memory  102 , a storage controller  104 , one or more processors  106  (one processor is shown in  FIG. 2 ), a peripheral interface  108 , a radio frequency module  110 , a positioning module  112 , a camera module  114 , an audio module  116 , a display module  118 , a key module  120 , and the like. These components communicate with each other through one or more communication buses/signal lines  122 . 
     It may be understood that the structure shown in  FIG. 2  is for the purpose of illustration, and the terminal device  100  may also include more or fewer components than those shown in  FIG. 2 , or have a configuration different from that shown in  FIG. 2 . For example, in some embodiments of this application, the terminal device  100  may include the memory  102 , the storage controller  104 , the one or more processors  106 , and the display module  118 . The components shown in  FIG. 2  may be implemented by using hardware, software, or a combination thereof. 
     The memory  102  may be configured to store a software program and module, for example, program instructions/modules corresponding to a method and a system for recommending text information in the embodiments of this application. The processor  106  runs the software program and module stored in the memory  102 , to implement various functional applications and data processing, for example, implement the method and a system for recommending text information in the embodiments of this application. 
     The memory  102  may include a high-speed random memory, and may also include a nonvolatile memory such as one or more magnetic storage systems, a flash memory, or another nonvolatile solid-state memory. In some embodiments, the memory  102  may further include memories remotely disposed relative to the processor  106 , and these remote memories may be connected to the terminal device through a network. Instances of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communications network, and a combination thereof. The processor  106  and other possible components may access the memory  102  under the control of the memory controller  104 . 
     The peripheral interface  108  couples various input/output devices to the processor  106  and the memory  102 . The processor  106  runs various software and instructions inside the memory  102 , so as to perform various functions of the terminal device and perform data processing. 
     In some embodiments, the peripheral interface  108 , the processor  106 , and the memory controller  104  may be implemented in a single chip. In some other embodiments, they may be separately implemented by an independent chip. In addition, it is noted that, in the embodiments of this application, the peripheral interface  108  is not necessary, but an optional module. 
     The radio frequency module  110  is configured to receive and send an electromagnetic wave, and implement mutual conversion between the electromagnetic wave and an electric signal, so as to communicate with a communications network or another device. The radio frequency module  110  may include various circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, a cipher/decipher chip, a subscriber identity module (SIM) card, and a memory. The radio frequency module  110  may communicate with various networks such as the Internet, an intranet and a wireless network, or communicate with other devices through a wireless network. The wireless network may include a cellular telephone network, a wireless local area network, or a metropolitan area network. The wireless network may use various communications standards, protocols and technologies, which include, but are not limited to, Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (W-CDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Bluetooth, Wireless Fidelity (WiFi) (for example, US Institute of Electrical and Electronic Engineers IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and/or IEEE 802.11n), Voice over Internet Protocol (VoIP), Worldwide Interoperability for Microwave Access (Wi-Max), other protocols for email, instant messaging and short message service, and any other suitable communications protocols, and even may include some protocols that have not been developed. In addition, it is noted that, in the embodiments of this application, the radio frequency module  110  is also not necessary, but an optional module. In this case, the radio frequency module  110  may also be replaced by another communications module, to implement a communications function with the server. 
     The positioning module  112  is configured to acquire a current location of the terminal device. Instances of the positioning module  112  include, but are not limited to, a Global Positioning System (GPS) and a positioning technology based on a wireless local area network or mobile communications network. It is noted that, in the embodiments of this application, the positioning module  112  is also not necessary, but an optional module. 
     The camera module  114  is configured to capture a picture or video. The captured picture or video may be stored in the memory  102 , and may be sent by using the radio frequency module  110 . It is noted that, in the embodiments of this application, the camera module  114  is also not necessary, but an optional module. 
     The audio module  116  provides an audio interface for a user, and may include one or more microphones, one or more loudspeakers, and an audio circuit. The audio circuit receives audio data from the peripheral interface  108 , converts the audio data into electric information, and transmits the electric information to the loudspeaker. The loudspeaker converts the electric information into an acoustic wave audible to the human ear. The audio circuit further receives electric information from the microphone, converts the electric information into audio data, and transmits the audio data to the peripheral interface  108  for further processing. The audio data may be acquired from the memory  102  or by the radio frequency module  110 . In addition, the audio data may also be stored in the memory  102  or sent by the radio frequency module  110 . In some embodiments, the audio module  116  may further include an earphone jack, for providing an audio interface for an earphone or another device. It is noted that, in the embodiments of this application, the audio module  116  is also not necessary, but an optional module. 
     The display module  118  provides an output interface between the terminal device  100  and the user. Specifically, the display module  118  displays a video output to the user, and content of the video output may include texts, images, videos, or any combination thereof. Some output results correspond to some user interface objects. Further, the display module  118  may further provide an input interface between the terminal device  100  and the user for receiving an input of the user, such as tapping, sliding, or other gesture operations of the user, so that the user interface object responds to the input of the user. The technology for detecting the input of the user may be a resistive touch detection technology, a capacitive touch detection technology, or any other possible touch detection technologies. Specific examples of the display module  118  include but are not limited to a liquid crystal display and a light-emitting polymer display. 
     The key module  120  also provides an interface for the user to input information to the terminal device  100 , and the user may press different keys to enable the terminal device to perform different functions. It is noted that, in the embodiments of this application, the key module  120  is also not necessary, but an optional module. In this case, the key module  120  may also be replaced by another input module, to implement an input function with the user. 
       FIG. 3  shows a structural block diagram of an embodiment of the server  200 . As shown in  FIG. 3 , the server  200  includes: a memory  201 , a processor  202 , and a network module  203 . 
     It may be understood that the structure shown in  FIG. 3  is for the purpose of illustration, and the server  200  may also include more or fewer components than those shown in  FIG. 3 , or have a configuration different from that shown in  FIG. 3 . The components shown in  FIG. 3  may be implemented by using hardware, software, or a combination thereof. In addition, the server  200  in this embodiment of this application may further include multiple servers having different functions. 
     The memory  201  may be configured to store a software program and module, for example, program instructions/modules corresponding to a method and a system for recommending text information in the embodiments of this application. The processor  202  runs the software program and module stored in the memory  201 , to implement various functional applications and data processing, for example, implement the method and a system for recommending text information in the embodiments of this application. The memory  201  may include a high-speed random memory, and may also include a nonvolatile memory such as one or more magnetic storage devices, a flash memory, or another nonvolatile solid-state memory. In some embodiments, the memory  201  may further include memories remotely disposed relative to the processor  202 , and these remote memories may be connected to the server  200  through a network. Further, the software program and module may further include: a service module  221  and an operating system  222 . The operating system  222 , for example, may be LINUX, UNIX, or WINDOWS, may include various software component and/or drivers configured to manage system tasks (such as memory management, storage device control, power management), and may communicate with various hardware or software components, so as to provide a running environment for other software components. The service module  221  runs on the basis of the operating system  222 , monitors a request from the network by using a network service of the operating system  222 , completes corresponding data processing according to the request, and returns a processing result to a client. That is, the service module  221  is configured to provide a network service for the client. 
     The network module  203  is configured to receive and send a network signal. The network signal may be a wireless signal or a wired signal. In an instance, the network signal is a wired network signal. In this case, the network module  203  may include elements such as a processor, a random memory, a converter, and a crystal oscillator. 
     The following describes the method and the system for recommending text content (that is, text information) provided in the embodiments of this application with reference to specific embodiments. 
     The method and the system for recommending text content provided in this application may be applied to a product of a browser for aggregating information. Recommendation information provided in this application is an expansion of information interested by the user, and a related recommendation scenario is generally exposed at the bottom of an article, to play roles of event aggregation and interest aggregation. 
     Referring to  FIG. 4 ,  FIG. 4  is a schematic flowchart of a method for recommending text content according to an embodiment of this application. As shown in  FIG. 4 , the method for recommending text content in this embodiment includes the following steps: 
     Step S 10 . Establish an information recommendation pool. 
     In some embodiments, the information recommendation pool may be pre-built, and the information recommendation pool is pre-stored in the database  300  and/or a buffer of the server  200 , and stores multiple articles of information texts. In this application, for ease of description, the information texts stored in the information recommendation pool are also referred to as second text content. The second text content in the information recommendation pool may be expanded reading of news or an article currently displayed on the terminal device  100  of the user. 
     Step S 11 . Obtain text content of an article whose information needs to be recommended. 
     In this step, the article whose information needs to be recommended may be an article opened by a user by clicking a news link on the terminal device  100 , or may be an article actively recommended to a user by a website editor according to current hotspot news or a hotspot article in WeChat circles, that is, text content such as news or an article currently displayed on the terminal device  100  of the user. In this application, for ease of description, text content whose information file needs to be recommended is also referred to as first text content. The text content of the article whose information needs to be recommended may be obtained from the database  300  or a local hard disk of the server  200  according to a click request of the user. In this application, “information” and “article” have close meanings, both refer to specific text content, and may refer to news, but “information” not only refers to news content, but also focuses on the heat and the timeliness of news, while “article” focuses on text content of news. 
     Step S 12 . Segment the article whose information needs to be recommended into multiple words. 
     In this step, the first text content is segmented into multiple words. Specifically, in this embodiment of this application, a word segmentation tool may be used to segment an article used as the first text content into single keywords. Algorithms that may be used during word segmentation include but are not limited to algorithms based on string matching, based on understanding, and based on statistical word segmentation. 
     Step S 13 . Predict a multi-dimensional topic allocation (distribution) of the article whose information needs to be recommended. 
     In this embodiment of this application, the prediction step may be predicting the multi-dimensional topic allocation of the article whose information needs to be recommended according to multi-dimensional topic allocations of words in an LDA model base. 
     The LDA refers to Latent Dirichlet Allocation. An LDA model a topic model, which may show a topic of each document in a document set according to a probability allocation form. In this embodiment of this application, in this step, the LDA model base is pre-stored in the database  300  and/or the buffer of the server  200 , and the LDA model base stores the multi-dimensional topic allocations (that is, LDA model) of multiple words. In the article on which word segmentation is performed in step S 12 , each word corresponds to a specific LDA model. The LDA model is obtained by using a machine learning method and according to an LDA training algorithm of a Gibbs sample, and may be updated periodically according to updated information. When the multi-dimensional topic allocation of the article is predicted according to the multi-dimensional topic allocations of the words in the LDA model base, multi-dimensional topic allocations of the words in the article whose information needs to be recommended may be comprehensively superimposed to predict the multi-dimensional topic allocation of the article whose information needs to be recommended. 
     In this embodiment, the topic dimension of the article is 500 dimensions. The selection of the data comprehensively considers the topic fine granularity division and the calculation amount. The topic fine granularity division and the calculation amount are balanced, that is, the article is ensured with a high topic fine granularity, and does not involve an excessively large calculation amount. According to researches of the inventor, being over 500 dimensions does not obviously improve the accuracy of a calculation result but significantly increases the calculation amount. 
     Step S 14 . Calculate an information correlation between the article whose information needs to be recommended and an article in the information recommendation pool. 
     That is, in step S 14 , the calculated correlation between the first text content and each piece of second text content in the information recommendation pool may be referred to as an information correlation. In this embodiment of this application, specifically, the correlation between the first text content and each piece of second text content in the information recommendation pool may be calculated according to the multi-dimensional topic allocation of the first text content and the multi-dimensional topic allocation of each piece of second text content in the information recommendation pool. 
     In some embodiments of this application, the correlation between the first text content and each piece of second text content in the information recommendation pool may be represented according to a cosine distance between the first text content and the second text content in a multi-dimensional topic space. 
     Specifically, the formula of calculating the correlation between the first text content and the second text content may be represented by the following formula (1): 
     
       
         
           
             
               
                 
                   
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     In the formula, x is an LDA vector of the first text content, x′ is an LDA vector of the second text content, and k is the quantity of LDA vectors in the article. 
     Formula (1) represents the cosine distance between the first text content and the second text content in the multi-dimensional topic space, so as to make the recommended second text content and first text content be close semantically. A larger cosine distance between an article in the information recommendation pool and the first text content in the multi-dimensional topic space indicates a higher information correlation between the article and the first text content. 
     Further, because the news and the article generally have timeliness and topicality, to further consider the timeliness and the heat of the recommended second text content in a content recommendation process, in some embodiments of this application, apart from considering the cosine distance between the first text content and the second text content in the information recommendation pool in the multi-dimensional topic space, a page view weight (PV weight) and an overdue penalty of the second text content in the information recommendation pool may be further considered. 
     In this case, specifically, the formula of calculating the correlation between the first text content and the second text content may be represented by the following formula (2): 
     
       
         
           
             
               
                 
                   
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     In the formula, x is an LDA vector of the article whose information needs to be recommended (first text content), x′ is an LDA vector of the article (second text content) in the information recommendation pool, k is the quantity of LDA vectors in the article, v is a pv (page view, or hits, which are generally a main indicator for measuring a network news channel or website or even a piece of network news) heat of information (second text content) in the information recommendation pool, that is, a click rate of an article, t is an overdue time of the information (second text content) in the information recommendation pool, that is, a time difference between an information release time and a current time, b is a bias smooth of the overdue time of the information (second text content) in the information recommendation pool, γ is an overdue scale adjustment coefficient of the information (second text content) in the information recommendation pool, and λ is a regression coefficient. 
     As described above, the first term in the foregoing formula (2) is a cosine distance between the article whose information needs to be recommended and the article in the information recommendation pool in the multi-dimensional topic space, so as to make the recommended article (second text content) and the article whose information needs to be recommended (first text content) be close semantically. A larger cosine distance between an article in the information recommendation pool and the article whose information needs to be recommended in the multi-dimensional topic space indicates a higher information correlation between the article and the article whose information needs to be recommended. 
     The numerator of the second term in formula (2) is a PV weight of the information (second text content, the log operation is performed because the click rate of the information article and the heat of the information article increase exponentially, and may be used as linear parameters after the log operation is performed, so as to improve the impact of the information heat on the information article correlation. 
     The denominator of the second term in formula (2) is performing penalty and decay on an overdue degree of the information article (second text content), so as to suppress old information articles, to ensure that information recommended to the user is relatively new information. 
     In one aspect, the value of b in formula (2) may prevent the denominator of the second term of the formula from being 0 when the information is latest information, that is, when the value oft is 0. In another aspect, the sensitivity of the information to time may be adjusted, so that information that occurs at that day is not excessively sensitive to time. For example, when the value of b is 5, if the value oft is small (representing that a time between the information release time and the current time is very short, that is, the information is very new), such as 1 (representing that the information has been overdue for 1 hour) and 2 (representing that the information has been overdue for 2 hours), the impact on the article information correlation is small. 
     The value of λ in the formula may be obtained by using a linear regression algorithm according to a CTR (click-through-rate) result. In this embodiment, the value of λ is 0.25, so as to make the values of the first term and the second term of the formula be relatively close, to make the impact of the first term of the formula for the article information correlation be close to the impact of the second term for the article information correlation. This mainly plays a balancing role. 
     The value of γ in the formula may be slightly adjusted, and is a value with the greatest CTR gain in solutions A and B by using an A/B Test method. In this embodiment, the value of γ is 1.5. 
     Step S 15 . Sort related information in the information recommendation pool according to a calculation result of the information correlation. 
     In this step, information correlation sorting is performed on the information according to the value of S(x,x′,v,t) obtained through calculation in step S 15  and according to a descending sequence. A larger value indicates a higher information correlation. 
     Step S 16 . Output recommendation information according to a sorting result. 
     In this step, information displayed to the user when the recommendation information is output is not all information in a recommendation information sequence, but the front sorted several pieces (for example, 5 pieces) of information displayed according to a specified or default standard. 
     In this embodiment, step S 15  and step S 16  are an embodiment of this application. In some other embodiments of this application, after the correlation between the first text content and the second text content is obtained through calculation in step S 14 , at least one piece of second text content may be output according to the calculation result of the correlation. For example, at least one piece of output second text content may be determined according to the sorting method described in the foregoing step S 15  and step S 16 . For another example, a correlation threshold may be further preset. When a correlation between a piece of second text content and a piece of first text content reaches the preset threshold, the second text content may be used as recommended text content to be output. 
     In addition, as shown in  FIG. 5 , according to an embodiment of this application, step S 10  of establishing an information recommendation pool may include: 
     Step S 101 . Collect information texts, and obtain content of the information texts. 
     In this step, the obtained content of the information texts may be used as second text content. The information texts may be various types of news obtained from other news websites, or may be various types of news directly obtained from the server  200  or the database  300 . The text content of the information texts may obtained by a server of another news website or directly obtained from the database  300  or the server  200 . 
     Step S 102 . Segment the collected information texts into multiple words. 
     In this step, that is, the obtained second text content is segmented to obtain multiple keywords. Specifically, in some embodiments of this application, a word segmentation tool may be used to segment an article into single keywords. Algorithms that may be used during word segmentation include but are not limited to algorithms based on string matching, based on understanding, and based on statistical word segmentation. 
     Step S 103 . Predict a multi-dimensional topic allocation of the information texts (second text content) according to multi-dimensional topic allocations of words in an LDA model base. 
     In this step, the LDA model base is pre-stored in the database  300  and/or a buffer of the server  200 , and the LDA model base stores the multi-dimensional topic allocation (that is, LDA model) of multiple words. In the information texts on which word segmentation is performed in step S 102 , each word corresponds to a specific LDA model. The LDA model is obtained by using a machine learning method and according to an LDA training algorithm of a Gibbs sample, and may be updated periodically according to updated information. When the multi-dimensional topic allocations of the information texts are predicted according to the multi-dimensional topic allocations of the words in the LDA model base, multi-dimensional topic allocations of the words in the information texts may be comprehensively superimposed to predict the multi-dimensional topic allocations of the information texts. In this embodiment, the topic dimension of the article is 500 dimensions. The selection of the data comprehensively considers the topic fine granularity division and the calculation amount. The topic fine granularity division and the calculation amount are balanced, that is, the article is ensured with a high topic fine granularity, and does not involve an excessively large calculation amount. According to researches of the inventor, being over 500 dimensions does not obviously improve the accuracy of a calculation result but significantly increases the calculation amount. 
     Step S 104 . Place the collected information texts into an information recommendation pool according to a specific sequence. 
     Herein, the placing the collected information texts into the information recommendation pool according to a specific sequence is an embodiment of this application. The sequence may be pre-determined, for example, according to the category of the information text, the quantity of repeated words in the information text, an information text receiving time sequence, or a preset sequence. 
     As described above, the information text in the information recommendation pool may be stored according to categories of the information texts, or may be stored according to the quantity of repeated words in the information texts, or may be stored according to the information text receiving time sequence. The quantity of repeated words in the information texts refers to the quantity of same words in two or more information texts. The larger quantity of same words in different information texts indicates that the categories of the information texts are closer or have a higher similarity. 
     If the information texts are stored according to the categories of the texts or the quantity of repeated words, when the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is calculated in step S 14 , an article whose category is close to that of the article whose information needs to be recommended or an article with the larger quantity of repeated words may be calculated. Therefore, the involved calculation amount is relatively small, the calculation speed is relatively fast, and the article may be used for online recommendation. If the information texts are stored according to the text receiving time sequence, when the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is calculated in step S 14 , all articles in the information recommendation pool need to be traversed to calculate the information correlation. Therefore, the calculation amount is relatively large, the calculation speed is relatively slow, and the information correlation needs to be calculated offline. 
     Further, in step S 14 , the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is represented by the cosine distance between the article whose information needs to be recommended and the article in the information recommendation pool in the multi-dimensional topic space, and the PV weight and the overdue penalty of the article in the information recommendation pool. Therefore, as shown in  FIG. 6 , the method for recommending text information of this application further includes: 
     Step S 141 . Obtain a click rate (or PV heat) of the article (second text content) in the information recommendation pool. 
     Step S 142 . Obtain a release time of the article in the information recommendation pool. 
     Step S 143 . Calculate the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool according to the multi-dimensional topic allocation of the article whose information needs to be recommended and the article in the information recommendation pool, and the PV heat and the release time of the article in the information recommendation pool. 
     In conclusion, in this embodiment, because when the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is calculated, calculation is performed not only for all keywords in the article, but the context of the article needs to be considered, thereby resolving the problems of semantic ambiguity and semantic relativity of the article. The impact of the information heat and the timeliness for the information correlation is further considered, user experience is improved, and an information PV conversion rate (a ratio of the PV times of clicking the information to the PV times of information exposure (it is assumed that every five pieces of exposed information are one exposure)) is greatly increased by nearly 200%. 
     For example, if the word “banana” appears in the context of an information paragraph with the word “apple”, it is more likely that the topic allocation of a superimposed article tends to the topic allocation of the “fruit apple”, but not the topic allocation of the “mobile phone Apple”. For another example, according to a word clustering feature of the LDA, “Ma Yun” and “Alibaba” are very close in the topic allocation. Therefore, information about Ma Yun and information about Alibaba are aggregated into one category as related information, to be an expansion of the related recommend. For another example, because the information heat and the timeliness are considered during calculation, the overdue information such as “Priscilla effect VS Wendi Deng rule, there must be a real encounter” and “asset preservation I Ding Yuan and inheritance FO revealing: Family trust that Wendi Deng also cannot defeat” may be filtered out when information recommendation is performed on “84-year-old Murdoch engaged with 59-year-old former super model”. 
     Another embodiment of this application provides a system for recommending text information, configured to implement the method for recommending text information in the foregoing embodiments. As shown in  FIG. 7 , the system for recommending text information includes an information recommendation pool  400 , an information text obtaining module  401 , a word segmentation tool  402 , a model base  403 , a prediction module  404 , an information heat module  405 , an information correlation calculation module  406 , an information sorting module  407 , and a result output module  408 . 
     The information recommendation pool  400  is pre-stored in the database  300  and/or a buffer of the server  200 , and stores multiple articles of information texts. The information texts stored in the information recommendation pool  400  may be various types of news obtained from other news websites by the information text obtaining module  401 , or may be various types of news directly obtained from the server  200  or the database  300  by the information text obtaining module  401 . The text content of the information texts may obtained by a server of another news website or directly obtained from the database  300  or a local hard disk of the server  200 . The obtained information texts are first segmented into multiple words by the word segmentation tool  402 , then a multi-dimensional topic allocation of the article in the information recommendation pool  400  is predicted by using the prediction module  404  according to multi-dimensional topic allocations of words in the model base  403 , and finally, the information texts are stored into the information recommendation pool  400  according to a specific sequence. The collected information texts in the information recommendation pool may be stored according to categories of the information texts, or may be stored according to the quantity of repeated words in the information texts, or may be stored according to an information text receiving time sequence. The quantity of repeated words in the information text refers to the quantity of same words in two or more information texts. The larger quantity of same words in different information texts indicates that the categories of the information texts are closer or have a higher similarity. If the information texts are stored according to the categories of the texts or the quantity of repeated words, when the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is calculated, an article whose category is close to that of the article whose information needs to be recommended or an article with the larger quantity of repeated words may be calculated. Therefore, the involved calculation amount is relatively small, the calculation speed is relatively fast, and the article may be used for online recommendation. If the information texts are stored according to the text receiving time sequence, when the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is calculated, all articles in the information recommendation pool need to be traversed to calculate the information correlation. Therefore, the calculation amount is relatively large, the calculation speed is relatively slow, and the information correlation needs to be calculated offline. 
     The information text obtaining module  401  is configured to obtain text content of an article and a release time of information. The article may be the article whose information needs to be recommended, or may be an article in the information recommendation pool  400 . The article whose information needs to be recommended may be an article opened by a user by clicking a news link on the terminal device  100 , or may be an article actively recommended to a user by a website editor according to current hotspot news or a hotspot article in WeChat circles, that is, text content such as news or an article currently displayed on the terminal device  100  of the user. The text content and the release time of the article whose information needs to be recommended may be obtained from the database  300  or the local hard disk of the server  200  according to a click request of the user. 
     The word segmentation tool  402  is configured to segment the article into multiple words. The article may be the article whose information needs to be recommended, or may be an article in the information recommendation pool  400 . Algorithms that may be used during word segmentation include but are not limited to algorithms based on string matching, based on understanding, and based on statistical word segmentation. 
     The model base  403  is pre-stored in the database  300  and/or a buffer of the server  200 , and stores multi-dimensional topic allocations of the multiple words. For example, the model base  403  may be an LDA model base. In this case, in the article on which word segmentation is performed, each word corresponds to a specific LDA model. The LDA model is obtained by using a machine learning method and according to an LDA training algorithm of a Gibbs sample, and is updated periodically according to updated information. 
     The prediction module  404  is configured to predict a multi-dimensional topic allocation of the article according to the multi-dimensional topic allocations of the words in the article. Specifically, the prediction module  404  may comprehensively superimpose the multi-dimensional topic allocations of the words in the article to predict the multi-dimensional topic allocation of the article. The article may be the article whose information needs to be recommended, or may be an article in the information recommendation pool  400 . In some embodiments of this application, the prediction module  404  predicts the multi-dimensional topic allocation of the article according to the LDA model base. In this embodiment, the topic dimension of the LDA is 500 dimensions. The selection of the data comprehensively considers the topic fine granularity division and the calculation amount. The topic fine granularity division and the calculation amount are balanced, that is, the article is ensured with a high topic fine granularity, and does not involve an excessively large calculation amount. According to researches of the inventor, being over 500 dimensions does not obviously improve the accuracy of a calculation result but significantly increases the calculation amount. 
     The information heat module  405  is configured to obtain a PV heat of the information. The PV heat of the information is PV hits of the information. 
     The information sorting module  407  is configured to calculate an information correlation between the article whose information needs to be recommended and the article in the information recommendation pool according to the multi-dimensional topic allocation of the article. The information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is represented by a cosine distance between the article whose information needs to be recommended and the article in the information recommendation pool in a multi-dimensional topic space; or represented by a cosine distance between the article whose information needs to be recommended and the article in the information recommendation pool in a multi-dimensional topic space, and a PV weight and an overdue penalty of the article in the information recommendation pool. The information correlation calculation module calculates the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool according to the multi-dimensional topic allocation of the article whose information needs to be recommended and the article in the information recommendation pool, and the PV heat and the release time of the article in the information recommendation pool. For the formula of calculating the article information correlation, reference may be made to the foregoing formulas (1) and (2). 
     The information sorting module  407  is configured to sort related information in the information recommendation pool according to a calculation result of the information correlation. Specifically, the information sorting module  407  performs information correlation sorting on the information according to a descending sequence and according to a calculated information correlation value. A larger value indicates a higher information correlation. 
     The result output module  408  is configured to output recommendation information according to a sorting result. In this step, information displayed to the user when the recommendation information is output by the result output module  408  is not all information in a recommendation information sequence, but the front sorted several pieces (for example, 5 pieces) of information displayed according to a specified or default standard. 
     As described above, the foregoing manner of performing information correlation sorting on the information in a descending sequence according to an information correlation value and outputting recommendation information according to a sorting result is an embodiment. In this embodiment of this application, the result output module  408  may output at least one piece of second text content according to the correlation between the first text content and the second text content. Apart from the manner of performing sorting according to the correlation, a correlation threshold may be further preset. When the correlation is greater than the threshold, the second text content may be output. 
     In conclusion, in this embodiment, because when the information correlation between the article whose information needs to be recommended and the article in the information recommendation pool is calculated, calculation is performed not only for all keywords in the article, but the context of the article needs to be considered, thereby resolving the problems of semantic ambiguity and semantic relativity of the article. 
     In addition, in some embodiments of this application, the impact of the information heat and the timeliness for the information correlation is further considered, user experience is improved, and an information PV conversion rate is greatly increased by nearly 200%. 
     It is noted that the embodiments in this specification are all described in a progressive manner. Description of each of the embodiments focuses on differences from other embodiments, and reference may be made to each other for the same or similar parts among respective embodiments. The system embodiments are substantially similar to the method embodiments and therefore are only briefly described, and reference may be made to the method embodiments for the associated part. 
     It is noted that the relational terms herein such as first and second are used to differentiate an entity or operation from another entity or operation, and do not require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms “include”, “comprise”, and any variants thereof are intended to cover a non-exclusive inclusion. Therefore, in the context of a process, method, object, or device that includes a series of elements, the process, method, object, or system not only includes such elements, but also includes other elements not specified expressly, or may include inherent elements of the process, method, object, or system. Unless otherwise specified, an element limited by “include a/an . . . ” does not exclude other same elements existing in the process, the method, the article, or the system that includes the element. 
     A person of ordinary skill in the art may understand that all or some of the steps of the foregoing embodiments may be implemented by using hardware, or may be implemented by a program instructing relevant hardware. The program may be stored in a computer readable storage medium. The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, or the like. 
     The above descriptions are merely embodiments of this application, and are not intended to limit this application in any form. Although this application has been disclosed above through the embodiments, the embodiments are not intended to limit this application. A person skilled in the art can make some equivalent variations, alterations or modifications to the above-disclosed technical content without departing from the scope of the technical solutions of this application to obtain equivalent embodiments. Any simple alteration, equivalent change or modification made to the above embodiments according to the technical essence of this application without departing from the content of the technical solutions of this application shall fall within the scope of the technical solutions of this application.