bluuebunny/crossref_metadata_2025 huggingface dataset:
Equalization of Rapidly Varying Channels for OFDM Systems Using Subblock Tracking
Authors: Zhong Qing Hua , Chen Kai Yan , Zhang Han
Published: December 2012

A novel equalization approach for rapidly time-varying channels of OFDM systems is presented,which we propose receiver windowing based ‘subblockwise’ tracking scheme to combat with intercarrier interference (ICI),whose aim is to force each subblock of one OFDM block as time-invariant such that channel equalization can be performed by a time-invariant structure. Meanwhile, signal-to-interference ratio (SIR) is numerically evaluated and derived as a close-form expression for performance analysis. Simulation results show that the proposed scheme outperforms the existing equalizers, while requiring a lower complexity.
Multiuser Interference Resisting of Ultra Wide Band Based on Independent Component Analysis
Authors: Zhang Shuang , Zhu Zhi Gang , Wu Jiang Biao
Published: December 2012

When several ultra-wide band (UWB) communication systems coexist, multiuser interferences (MUI) are unavoidable. To cope with the MUI of UWB systems, the independent of UWB signals are investigated and a novel receiving method is proposed. At first several antennas are utilized to receive the transmitted signals of different UWB users, and the mixture signals are gained. Then the mixed signals are separated by independent component analysis algorithm to recover the transmitted signals of each UWB users. Finally, the information of each UWB users transmitted is demodulated. Computer simulations show that the proposed method can efficiently resist the interference of different UWB users.
Packet Scheduling Algorithm in MAC of Smart Antenna System
Authors: Shi Chun , Dai Xian Hua , He Shu Qian , Deng Zheng Jie , Liang Ping Yuan
Published: December 2012

Head of Line (HOL) blocking and deaf node problem are the main challenges in the smart antenna system in wireless ad hoc networks. To resolve these difficulties, we propose a novel packet scheduling algorithm based on the Directional Network Allocation Vector (DNAV). In the new algorithm, we divide the surrounding space of a tagged node into interference regions and free regions, and then transmit packets selected in turn from the data queue if there is an appropriately free region. The proposed algorithm can eliminate the deaf node problem and resolve the HOL blocking efficiently. Higher throughput and lower network delay are obtained by adapting to the dynamic network topology than other methods. The simulation results confirm the validity of the proposed algorithm.
Nonlinear Analog Circuit Fault Diagnosis Based on MFDFA Method
Authors: Tang Jing Yuan , Chen Jian Ming , Zhang Cai
Published: December 2012

This paper presents a fault diagnosis method for nonlinear analog circuit based on multifractal detrended fluctuation analysis (MFDFA) method. The MFDFA method is applied to analysis fault signal and extracts the multifractal features from the raw signal. The selected features are given to SVM classifier for further classification. The data required to develop the classifier are generated by simulating various faults using Pspice software. The simulation results show that the proposed method provides a robust and accurate method for nonlinear circuit fault diagnosis.
Performance Enhancement of Atmospheric Coherent Optical Communication Systems Using DPSK
Authors: Li Yu Peng , Zhang Yan Gan , Yuan Xue Guang , Zhang Jin Nan , Zhang Ming Lun , Huang Yong Qing
Published: December 2012

A coherent DPSK transmission system is presented to improve the receiver sensitivity for free space optical (FSO) communication. The coherent DPSK is an effective way to overcome the atmospheric turbulence. The eye diagram and bit error rate (BER) of the system are got by the simulation. Results show that with the coherent reception method, coherent DPSK offers improved signal-to-noise ratio (SNR) performance compared to the DPSK without coherent and OOK format. And hence it can be effective to overcome the signal impairment caused by atmospheric turbulence. It is shown that the sensitivity of the system employing coherent DPSK is 3dB better than a comparable system using DPSK without coherent and 9dB better than a system using OOK.
Research on the Structure of Peer-to-Peer Overlay Based on the Complex Network Theory
Authors: Jiang Zhi Yong
Published: December 2012

Relationship between nodes in peer-to-peer overlay, currently becomes a hot topic in the field of complex network. In this paper a model of peer-to-peer overlay was purposed. And then the paper focused on figuring out the mean-shortest path length (MSPL), clustering coefficient (CC) and the degree of every node which allowed us to discover the degree distribution. The results show that the degree distribution function follows approximately power law distribution and the network possesses notable clustering and small-world properties.
Technology and Application of Integrated Satellite Navigation and Communication Signal
Authors: Cui Jun Xia , Shi Hu Li
Published: December 2012

The integration of navigation and communication technologies can be divided into three levels: system level, terminal level and the signal level. The integration technology of satellite communication and navigation is introduced briefly at first. Then the combination of communication and navigation functions at the signal level is analyzed and researched in depth. A novel idea is proposed that pseudo-range measurement and positioning can be achieved while keeping the existing communication functions, only by adding positioning related information. Finally, application of communication and navigation signal integration is prospected.
A Micro-Cluster-Based Data Stream Clustering Method for P2P Traffic Classification
Authors: Yan Guang Hui , Ai Ming Hao
Published: December 2012

Many machine learning techniques were proposed to classify P2P traffic and each with reasonable successes. But in the real P2P network environment, new communities of peers often attend and old communities of peers often leave. It requires the identification methods to be capable of coping with concept drift and updating the model incrementally. In this paper, we presented a concept-adapting algorithm MCStream which was based on streaming data mining techniques to identify P2P applications in Internet traffic. The MCStream used two micro-cluster structures, potential micro-cluster structures and outlier micro-cluster structures, to classify the P2P traffic and discovered the concept drift with limited memory. Our performance studied over a number of real data which was captured at a main gateway router demonstrates the effectiveness and efficiency of our method.
A QoS-Aware Power-Control Game Scheme for Secondary Users in Cognitive Radio Network
Authors: Ran Xiang Yin , Si Peng Bo , Zhang Yan Hua , Yang Rui Zhe
Published: December 2012

To deal with the power control problem in cognitive radio (CR) networks, in this paper, the non-cooperative power game is studied, in which each CR user distributedly and asynchronously updates its transmission power. Taking into account the different quality of service (QoS) requirements, with the objective as maximizing the average utility of each CR user under the interference power constraints of primary users, we propose a QoS-aware power control game scheme and introduce the sigmoid efficiency function related with CR user’s signal-to-noise ratio threshold and the price function. Besides, extensive simulation results are presented to show the significant performance improvement of the proposed scheme compared to the existing ones.
An Approximate Formula for WER of TURBO-Like Codes over Fading Channels
Authors: Dai Li Yun
Published: December 2012

By using radius of decision region, an approximate formula to estimate word error rate (WER) of Turbo-like codes is proposed. The approximate formula is simply expressed in the form of Gaussian Q function, which consists of signal to noise ratio (SNR), mathematical expectation and variance of squared radii in decision region, etc. In addition, the approximate expression can be easily extended to fading channels with negligible error of WER. Simulation results show that the deviation between the proposed formula and Monte Carlo simulation is no more than 1dB over fading channels.
Research of Rate-Matching for TD-SCDMA System
Authors: Bai Wen Le , Xue Shen , Zhang Yong Mei , Wang Xu
Published: December 2012

Rate-matching is to ensure the transmission channel multiplexed total bit rate to match the physical channel carrying capacity in TD-SCDMA system. It directly affects the quality of sending data. This paper is focused on the researches of rate-matching, the three important parameters is calculated, the rate-matching processing is presented, the computation flow chart is given, and the computation results is listed to demonstrate the influence of semi-static performance on data rate-matching. It provides some basis for the further research of TDD communication.
Research on Realization of First Interleaving for TD-SCDMA System
Authors: Liu Wen Kai , Cheng Min , Bai Wen Le
Published: December 2012

The first interleaving is an effective measure to eliminate long time continuous error during channel coding and multiplexing of TD-SCDMA. In this paper, a circulated cross-connection method is proposed for the first interleaving , and the implemation schedule is designed. The results verified that the method could meet the performance requirement for the first interleaving and is accurate and reliable.
A New Dynamic Form Component Oriented GIS Applications
Authors: Chen Ying , Chen Jin , Wu Jian Hua , Zhou Fan
Published: December 2012

A new dynamic form component applicable to be integrated with GIS (Geographic information system) was developed to meet the needs of the geographic information industry and the demands of GIS customers. The general framework of the dynamic form component and adopted key technologies such as dynamic compilation and reflection are studied. Practical applications in GIS projects show that the dynamic form component can effectively improve the development speed and quality of GIS applications, and can provide appropriate user interactive abilities.
The Literacy Controller Design of SD Card Based on FPGA
Authors: Liu De
Published: December 2012

In this system,the literacy controller of SD card by SPI interface is designed based on FPGA.The overall design is realized in Nios II soft processor with C/C++ language,and the technology of First In First Out is used to solve timing problems,and then ultimately the overall design features are realized.This design takes advantages of the features of FPGA,which has reduction in development time,an efficient data processing,and other characteristics.The successful application in data storage collected by the audio chips shows that the design is feasible and valid.
Research on Wireless Communication Distributed Anti-Collision about Group Tower Cranes
Authors: Chen Guang Zhong , Zhang Bing , Yang Yue
Published: December 2012

In order to solve tower cranes interference and collision problems in the construction site, wireless communication mode among tower cranes is analyzed. Comparing of different network mode for the ratio station, rotating point-to-multipoint wireless network mode is put forward. Wireless token ring network solutions are put forward for half-duplex radio communication. Token-ring network communication protocols are draw up and workflow of wireless network is analyzed in detail. Distributed control algorithm for the group tower cranes anti-collision is put forward based on wireless communication algorithm
Strategies of Mobile Carriers for the Evolution of Mobile Networks in Korea
Authors: Oh Junseok , Kim Taisiya , Park Soo Kyung , Lee Bong Gyou
Published: December 2012

The mobile network has been developed from 2nd Generation (2G) to Long Term Evolution (LTE) network in Korea. The purpose of this paper is to examine the key factors which affect network development, and to recognize how the mobile carriers and users perceive the rapid change of mobile technology. This study focuses on a pretest to confirm the important factors from the Focus Group Interview (FGI) to Korean Telco representatives and mobile device users. The results show that mobile device users consider devices and contents as more important factors while Korean Telco representatives pursue various strategies and priorities for network evolution. The study will contribute to recognize the differences between providers and users for introducing the new mobile network. Since this paper only describes the pretest results, further research will be conducted with in-depth interview data and statistical approaches.
A Data Pretreatment Method about Power System Load Modeling
Authors: Wang Yan Ping
Published: December 2012

Short-term load forecasting is one of the most important routine works for power dispatch departments. The accuracy of load forecasting will exert direct effects on the safety, economy and stabilization of the power system running. Portrait and transverse comparability are employed to distinguish and correct bad load data, while wavelet analysis and multiple-time-period analysis used to eliminate long-term increasing weights, thus reducing the impact of the high-speed load increase on the accuracy of load forecasting.
Intelligent Scheduling Method Oriented to Multi-Varieties and Small-Batch Production Mode
Authors: Zhou Dan Chen , Zeng Liang
Published: December 2012

In terms of characteristics of scheduling problem in multi-varieties and small-batch production mode, three additional constraint conditions including combination constraint, priority scheduling and machine load balance are supplemented based on classical Job-shop scheduling model in order to reflect the actual scheduling activities better. An improved genetic annealing algorithm is proposed aiming at the above model, and the requirement of supplemented constraint conditions is satisfied by means of improving the decoding process of chromosomes. The key technologies of algorithm are discussed in detail. The feasibility and validity of the proposed model and algorithm is demonstrated through simulated computation.
GPU Accelerated CFD Simulation in Electronics Cooling
Authors: Sun Howard , Zhou Yong Quan , Liang Yong Sheng
Published: December 2012

CFD(Computer Fluid Dynamics) simulation is widely used in IT industry, it usually based on the latest CPU computing power and software technology, can easily take hours even days. A new 3D Navier-Stokes solver based on the SIMPLE algorithm but totally rewritten from ground up with Nvidia’s CUDA software programming API was studied by investigating the use of the latest GPU technology for an electronics cooling problem. The GPU accelerated CFD simulation by using massively parallel algorithm accelerated the calculation by 3.55 times.
The Estimation of Precession Character Based on Multi-LOS HRRP
Authors: Feng Cun Qian , Zhang Jie , Ma Qi Lie
Published: December 2012

In this paper, we use the cone as the model of the warhead to analysis its precession character and target character, which will affect the HRRP (High Resolution Rang Profile) of the warhead. What’s more, we build a model to simulate the situation when the target is observed from multiple line-of-sight (multi-LOS) of radar. After all the research, we come up with an arithmetic that joins precession character and structure character which are based on the multi-LOS time-HRRP. This arithmetic uses all the information that received by radars simultaneously, which can improve the accuracy of the estimation. The simulation experiment indicates the effectiveness of the arithmetic.
The Simulation Study on Environmental Field of Livestock and Poultry Establishments under Two Winds Conditions
Authors: Zhang Li
Published: December 2012

The living environment of the rural livestock has the influence on livestock health and production performance. Its living environment in general is composited by the warm air temperature, humidity, airflow (wind) speed and solar radiation. Air flow conditions within the livestock and poultry establishments have a significant impact on livestock living environment and other factors. In this paper, the method of computational fluid dynamics is used to analyze the distribution of the velocity field and temperature field within the fan imports and corridor export conditions of livestock and poultry breeding places. The results show that: the airflow in the vicinity of the air inlet fan speed larger maximum reach 6.09m / s, the wind speed is low in the other regions. In Breeding places, the air flow near the fan on both sides of the wall near vortex, the more the more obvious near the center of the vortex of the place. The temperature near fans inlet is significantly lower than that near the other regions. The research results will provide ventilation of livestock breeding places designed to provide a theoretical basis and guidance.
Campus Network Upgrade and Optimization Based on OPNET
Authors: Zhu Kai Yu , Liu Jia Yu , Gao Xue Fei , An Yong Li , Xiong Qiang
Published: December 2012

By using OPNET simulation platform, the network simulation model of campus network was constructed and the user’s behaviors of the networks were analyzed. The network latency, the page response time and the throughput capacity of the switch were simulated in the original campus network and the extended network. By using the two sets of data for comparison and analysis, the impact of the campus network performance factors and "bottleneck" were found. An appropriate optimization design of the campus network was proposed and simulated again. Through the simulation, the reliability and accuracy of the design will be proved, and the network construction period will be shortened.
Design and Implementation of Geometric Descriptions Based on XML
Authors: Jia Hong , Lu Cong Da , Lu Yan Lin
Published: December 2012

Object recognition and reconstruction plays an important role in the area of 3D robot vision, which has wide applications in autonomous mobile system. For communication between heterogeneous applications, generalized and universal object description file format is needed to be developed to replace proprietary file format. In this paper, first, a new object description model was designed by using XML Schema definition language. Second, based on the description design, a dynamic link library (dll) was implemented for converting data format among different systems. At the end, experimental results are demonstrated.
Design and Programming on Fill-in-the-Blank Question Scoring Strategy Based on VFP Paperless Examination System
Authors: Gu Zhen Shan , Wang Ai Lian , Chen Bai Song , Lv Ying Jun
Published: December 2012

This paper analyzes the comprehensive strategy of the paperless examination system for the fill-in-the-blank question automatic scoring in detail ,specifically addresses the implementation of this scoring strategy and the programming based Visual FoxPro code.
Correlation Analyzer Project for Teaching Digital Signal Processing with MATLAB and DSP Processor
Authors: Liu Yang , Tie Yong , Na Shun , Li Dong
Published: December 2012

Digital signal processing (DSP) has become one of key enabling technologies for communications, condition monitoring, multimedia computing, wireless networks and other areas requiring signal and information processing. With the rapid growth of applications of digital signal processing in the world, it has become necessary to introduce these concepts to graduates and undergraduates. Teaching of digital signal processing is carried out not only at the electrical and electronic engineering departments as the most traditional interested in this subject, but also others technical universities are carried out lectures and tutorials. In this paper, a digital signal processing development process is described. It starts from the conceptual algorithm design and computer simulation using MATLAB. After verification of the algorithm, a fixed-point C program is developed for a specific fixed-point DSP processor. This application covers most topics included in a DSP courses performing independent multiple simple experiments. The used methodology enables students and engineers to understand and develop complex fixed-point applications on hardware implementations.
Dynamic Generalized Suffix Arrays
Authors: Lu Song Feng , Zhao Hua
Published: December 2012

Document retrieval is the basic task of search engines, and seize amount of attention by the pattern matching community. In this paper, we focused on the dynamic version of this problem, in which the text insertion and deletion is allowable. By using the generalized suffix array and other data structure, we proposed a new index structure. Our scheme achieved better time complexity than the existing ones, and a bit more space overhead is needed as return.
Embedded Real-Time Database System Concurrency Control Protocol AC-Based OCC-FV
Authors: Liu Zhi Cheng , Lin Dong Sheng , Ning Yun Zhi
Published: December 2012

Alternative and compensation are not only two basic characteristics of the real-time transaction but also the body of the concurrency control. At the same time, new problems are brought. AC-Based OCC-FV protocol associates alternative and compensation with optimistic concurrency control protocol OCC-FV. For each transaction in accepted queue, an alternative which causes no conflict can be chosen to join the ready queue as soon as possible. This is just a kind of ideal circumstance. If the conflict is inevitable, it is necessary to choose a suitable alternative to join the concurrency control, but also ensures the system to be in a safe state when conflicts take place. In conflict resolution, the optimistic concurrency control protocol OCC-FV is extended in combination with the compensation characteristic, when the transaction failed, immediate dispatch of corresponding compensation transactions is taken to prevent the system from disaster.
Geospatial Data Organization Method Based on GeoSOT Model
Authors: Yang Yu Bo , Cheng Cheng Qi , Hao Ji Gang
Published: December 2012

In order to solve the problem of the hardness of utilization and sharing of geospatial data, a new organization method of mass geospatial data based on global subdivision model was proposed in this study. First, the organization method of mass geospatial data based on GeoSOT was discussed in three aspects. Second, the unified organization framework and system platform was designed. This approach offers an effective way to implement management, organization and use of mass geospatial data.
Modeling and Analysis of Multilingual Information Parallel Downloads in Data Grid
Authors: Han Yao Jun , Luo Xue Mei
Published: December 2012

The need arises in parallel downloads of multilingual information for powerful graphical and analytical tools, as information with a variety of different languages distributed in different Web pages and the databases are heterogeneous and uneven in data grid. Petri net is a powerful graphical and mathematics tool for describing the concurrent, asynchronous and dynamic events. The parallel downloading of multilingual information was modeled and analyzed using extended timed colored Petri net (ETSdCPN). In ETSdCPN model, the color represents different languages information, and the time duration associated with place instead of transition is a function of tokens instead of constant. The reachable parallel download graph (RPDG) of ETSdCPN is defined. Finally, some important results such as rate of satisfaction and makespan of multilingual information parallel downloads are gotten by analyzing reachability of Petri net.
On the Construction of Network Sharing Platform of Personnel File Management and its Management Model
Authors: Liu Mei Wen , Liu Li
Published: December 2012

The moderate public of personnel file information is the basic to realize modern archives management as realizing effective utilization of archives, protecting the rights and interests of public, and so on. The establishing personnel file management network sharing platform is an effective way to it. Personnel file network sharing platform’s construction must formulate the corresponding national standard and professional standard, and adopt new personnel file managing model. This paper describes the basic content of information standardization of personnel file management, and then put forward the "Trinity Model" of personnel archives management, that is, the combination of traditional personnel file management, digital personnel file (digital archives) management and personnel file management networking platform’s construction and utilization.
Refined Reachable Relationship Analysis for an Irreducible Active Rule Set
Authors: Xiong Zhong Min , Zhao Meng Lu , Huang Dong Mei , He Shi Jun
Published: December 2012

The existing method is deficient when characterizing the features of rules in a nonterminating rule set through the notion of reachability. To address this problem, this paper proposes a refined reachable relationship analysis based on two notions of triggering reachable and activation reachable. A counterexample and the detailed proof in this paper show that our method is effective.
Research and Implementation of the Android Graphics System on the ARM Platform
Authors: Yin Tie Yuan , Su Ming Jun
Published: December 2012

This paper introduced the architecture of Android graphics system, and analyzed the composition and characteristics of each layer according to the hierarchy, and elaborated the relationship of the native implementations and the user implementations in the graphics system and the display principle of the Android platform. In the end, the programming method of the display driver of Android kernel on ARM6410 platform was elaborated.
Research and Optimization on Media Access Control Delay of CAN
Authors: Zhang Hong Wei , Zhang Wen Juan , Han Xue Feng
Published: December 2012

With data quantity increasing dramatically and signal transmission period becoming more and more fast, the media access control delay has proved to be one of the main influence factors of CAN network real-time. Firstly, an equivalent numerical simulation model of CAN bus network is built to derivate the mathematical expression of media access control delay. Secondly, optimization measures are further proposed to improve the data communication real-time. At last, the optimization measures tested by experiments are proved to be correct and effective.
Research on LAI Retrieving Applied for Virtual Reality Simulation of Vegetation
Authors: Pan Tong , Li Xiao Jing , Wang Hao Peng , Zhao Kai
Published: December 2012

It is the key process for developing usability of virtual reality simulation of vegetation taking into account soil, chemistry elements of water, temperature and humidity of land surface, and lighting. Retrieving the characteristics of vegetation from remote sensing data effectively and exactly, building the relationship between remote sensing data and interfaces of VR-vegetation models are important. The paper discusses dense vegetation model, nondense vegetation model, and two-stream approximation model applied for LAI retrieving, analyzes the efficiency of the methods; presents the process and method of LAI retrieving based on FPAR. The research offers the key methods and theoretic support for virtual reality simulation of vegetation based on spatial remote sensing information. The research is the primary work of digital agriculture, and important for monitoring corn growth and estimating in northeast of China.
Research on Task-Oriented Application Design
Authors: Zhou Chuan Sheng
Published: December 2012

Alone with “The Internet of Things” development and expanding in the areas of life, it also brings some big challenges to the traditional software application design and development; especially with the corresponding technologies and strategies of the internet of things enhancement and improvement, and further more with some new equipments and technologies appended or changed in the existing environment, it needs rapidly and easily add some new functionalities to the existing working software applications. But the traditional application design and development still thinking of solution from designers and developers and not from the business point of view, this results in the traditional software applications and its scalability cannot be easily and rapidly satisfy to business requirements. Here, by research on XML, software bus, software component and task-oriented technologies, it illustrates a new way for the software application design and development and try to use task-oriented technology to improve the software application flexibility and scalability to satisfy to enterprise business changes.
Design of Small Step Frequency Conversion Module in S Band
Authors: Xie Yong , Liang Sheng , Pan Gao Feng , Xue Jun
Published: December 2012

The small step frequency conversion module is an important unit for a type of simulation equipment. This paper tries to design a kind of small step frequency conversion module which solves the design problem of frequency converter in simulation equipment. The study of small step frequency conversion technology is the main part in this paper. It is using two-stage PLL and DDS which sets frequency and controls step, to meet the design need.
The LAN Information Integration Model Research Based on User's Individual Needs
Authors: He Ming Xiang , Sun Qing Ye , Shan Feng , Lu Xin Ming
Published: December 2012

A maximum-meet user’s individual needs integration model was presented in this paper, which integrated information integration thinking, Web3.0 with open platform. The model embedded Service-Oriented Architecture (SOA) framework realized the information integration. Then combined the OpenID ,OAuth, and role-based access control (RBAC) achieved single sign-on and authorization system; finally, based on Maps API Mashup applications realized the interaction between the LAN Web information and maps. The model has the advantage of friendly interface, strong replicability, and high security.
The Research and Implementation of Virtual Training System Based on DIVISION Mockup and Position Tracker
Authors: Huang Wu Sha , Chen Qiang , Wang Min Zhuo , Ye Hao Nan
Published: December 2012

This paper dissertates the application of Virtual Reality Technology in the training process. Virtual training system has more advantages than traditional training system. The design of virtual training system based on PTC DIVISION Mockup software, position tracker and 3-D mouse is proposed. The system is divided into two parts: directing part and operating part. The directing part is mainly implemented by Functional Simulation structure in DIVISION Mockup. The operating part is realized by virtue of the third-party plug-ins, which connects peripherals with the virtual reality system. This system is applied to the training process of hydraulic pump cart’s assembly and disassembly. More immersive training effect is obtained in this system. The goal of reducing training costs and improving the efficiency of training can be achieved in the virtual training system.
The Research of Chinese Text Automatic Classification Based on Multiple
Authors: Zhang Sheng Li
Published: December 2012

Support Vector Machines (SVMs) is a new technique for data mining. It has wide applications in various fields and is a research hot pot of the machine learning field, but, being applied to handling large-scale problems, SVMs needs longer t raining time and larger memory. It’s an effective way to solve large scale data processing in text classification with multiple classifier systems composed by multiple support vector machine classifiers. Based on the analysis of traditional parallel algorithms, this paper proposes an improved algorithm based on multiple SVMs. The experimental results indicate that the new algorithm works well in precision and recall rate in the condition that the speeds of classification increase remarkably. Compared with traditional algorithms, the classified accuracy is lower but is within the range for acceptance.
The Research on Simulation of Storage Operation System Based on Flexsim
Authors: Zhou San Yuan , Chang Shuang , Liang Chen
Published: December 2012

The warehouse is the major place for storing the goods in the logistics operations. And the operation flow of warehouse has a direct impact on the logistics efficiency and benefit. Otherwise, logistics simulation technologies have been widely used in the field of logistics. It verified the validity and rationality of the logistics planning in a certain extent. This article use Flexsim as the simulation’s tool, and take X Company as the research object. And we used Flexsim to establish the simulation model of X company’s warehouse. According to simulation results, we analyze the bottleneck problem in the warehouse operation. Then put forward some suggestions for improvement and optimization.
XML Keyword Search Algorithm Based on Level-Traverse Encoding
Authors: Yao Quan Zhu , Tian Bing , He Wang Yun
Published: December 2012

For XML documents, existing keyword retrieval methods encode each node with Dewey encoding, comparing Dewey encodings part by part is necessary in LCA computation. When the depth of XML is large, lots of LCA computations will affect the performance of keyword search. In this paper we propose a novel labeling method called Level-TRaverse (LTR) encoding, combine with the definition of the result set based on Exclusive Lowest Common Ancestor (ELCA),design a query Bottom-Up Level Algorithm(BULA).The experiments demonstrate this method improves the efficiency and the veracity of XML keyword retrieval.
A Evaluation Method of Software Interface Design Used on Home Appliances
Authors: Wang Wei Wei , Yang Xiao Yan
Published: December 2012

The interface design of software used on Home Appliances targeted at satisfying passenger's physiology and psychological needs when operating the machine to the maximum extent is a complicated synthetic topic which embracing ergonomics, visual communication design, user experience design, behavior psychology, cultural studies of the consumer, optics and Chromatics and so on. So, it is very difficult for us to find a unified criterion which can be used to estimate the interface design of the software used on Home Appliances. In order to improve science and objectivity of the evaluation process, this paper established the evaluation index system centered on the user experience firstly. Then identified the weight of each index used AHP. Furthermore, constructed the evaluation analytical model used the Gray Disaster theory. This method effectively overcomes the subjectivity and arbitrariness in the evaluation process. Finally, the prototype system of the software has been developed to verify the validity of the method.
About Five Senses and Six Feelings in Interaction Design
Authors: Song Fang Hao , Ma Fu Jun , Liu Yan
Published: December 2012

This paper explains “five senses and six feelings” theory in traditional culture, also shows useful thoughts of practice of interaction design and methods to integrate Chinese traditional culture spirits into it, which provides useful reference for designers.
An Analysis Method of Semantic Relevancy on Controlled Tag
Authors: Li Jiu Qing , Zhang Chi , Zhang Peng Zhou
Published: December 2012

To solve resource-tagging inefficiency and low-precision retrieval in special field, an analysis method of tag semantic relevancy based on controlled database was proposed. The characteristic of special field and building method for controlled database were discussed. Domain ontology correlation calculation method was used to get semantic correlation. The tag semantic similarity calculation method was developed for semantic similarity, and normalization was used to increase the similarity accuracy. With semantic correlation and similarity as parameters, the semantic relevancy in special field can be obtained. This method was used successfully in the special field of actual projects, improved resource-tagging and retrieval efficiency.
An Improved Three-Dimensional Target Octonion Representation
Authors: Chen Xiang Hua , Zhou Juan
Published: December 2012

It is an efficient way to represent three-dimensional objects by octree.The traditional structure of pointer -based octree representation has several shortcomings,such as requiring large memory,missing relationship between two nodes,etc.Based on analyzing the space Iayout and the configuration of octree,this paper presents an improved octree for 3D representation.From the experimental results for 3D reconstruction of medical images,we can see the proposed method is superior to the traditional method in terms of the storing structure and visiting way,etc.
Fault Diagnosis System of A2/O Process Based on Parameter Estimation and Expert System
Authors: Yu Miao , Pan Feng , Lian Xiao Feng , Li Xiao Ting
Published: December 2012

For urban sewage treatment process of A2/O, a fault diagnosis method based on parameter estimation of Activated Sludge Model No.2(ASM2) model and expert system is proposed. Firstly, the A2/O process is simulated based on Activated Sludge Model No.2(ASM2) model, according to which, the estimated value of component parameters of biochemical reaction process is obtained, and when it’s compared with the normal value of corresponding parameters, the faults can be detected. Furthermore, an expert system that can draw fault diagnosis results is designed by means of uncertainty reasoning for expert knowledge. Finally, a fault diagnosis system for A2/O process is developed. For a sewage treatment plant of Kunming, experiment result has shown that the fault diagnosis system for A2/O process can make effective diagnosis of the actual process issues, and it has certain engineering practicability.
Mechanism and Implementation of Distributed Workflow for Electric Power Dispatching
Authors: Liang Yun , Cheng Xu , Huang Feng , Liu Jian Bo
Published: December 2012

The workflow of electric power dispatching features many characteristics, such as multi-level dispatching, multiple applications, safe, and reliable. This paper analyzes the characteristics of electric power dispatching process, and proposes the descriptive standard of electric power dispatching process, as well as the workflow operation mechanism on the basis of documents, which can achieve distributed processing of the flow. Meanwhile, based on smart electric power dispatching technological support system, it can apply integration through service bus and other services. The practice has proved that this mechanism can meet the need of wide circulation for electric power dispatching flow, and it possesses favorable application value.
Research on Embedded Software Testing Based on Code Coverage and Variable Watching
Authors: Du Song Yang , Yang Hua , Zhang Ying , Chen Zhong Wei
Published: December 2012

The limitation of traditional testing tools makes it difficult to test the software of embedded system--the resource insufficiency of the embedded system as well as the strict requirement of real-time all contribute to the unavailability of the normal method for software testing. This document introduced a method about testing of embedded software, which based on code coverage and variable watching by using the software of Testbed and RTInsight. By using this method, it’s effective to validate the software testing of embedded system.
Research on Manual Sorting for Lines in Engineering Drawing Based on the Secondary Development of Inventor
Authors: Qiao Ling Gan , Zhang Yi Min , Zhang Ai Mei
Published: December 2012

While dealing with Engineering Drawing based on the secondary development of Inventor, different kinds of label symbols are due to be added based on the lines in the views. For serialized parts, the system sort of the lines will change with the change of 3D models, so we need to add manual sort artificially. Through research, several methods of manual sorting have been summarized: First to traverse lines based on shape, filter out the types of the lines. Then traverse the types, take advantage of extreme value method, method using center of the view as reference system, method using manual sorted line as reference system, and composite method to positioning lines, give them manual sorting. These methods solved the sort consistency of the same lines in different views, ensured the accuracy of labeling.
Research on Mobile Social Network Based Multimedia Sharing Application
Authors: Wang Bo Ran
Published: December 2012

New application requirements like “real-time” and “multimedia” is formed gradually with the trend of convergence of the Internet, web 2.0 and telecommunication network. In the era of Internet and web 2.0, users hope to communicate under multimedia context, to which Weibo and other SNS have adapted a lot. Users of web community wish to demand real-time videos and share with others instantly. Network convergence, IMS (IP Multimedia Subsystems) and VoLTE deployment all make the telecom operators long for new multimedia services. In terms of the users, they want to receive multimedia service anywhere and anytime, while the service and content providers also want to build a barrier-free channel for offering and distributing service. Taking the related technologies and user requirements into consideration, a multimedia sharing service and application is proposed and demonstrated in this paper. The system technique schema and deployment solution could help understanding the multimedia sharing service framework and modules in the convergence network. Samples of signal flows and processes are demonstrated in 3 typical application scenarios. Business application, product perspective and business model analysis shows the great market potential of this new multimedia sharing application and service in the near future.
Research on the Embedded Real-Time Database Key Characteristics Analysis and Testing Technology
Authors: Zhang Ying , Yang Hua , Ai Di Ming , Wang Jia Si
Published: December 2012

Currently, the embedded real-time database is widely applied in the embedded system and plays an important role. But on account of being mainly applied to the most important fields such as Communication, Spaceflight and Military as a key task control management, errors by it often results in irreversible fatal losses. Therefore, it is necessary to analyze the embedded real-time database key characteristics and test. This paper, by researching the characteristics, architecture and implementation technique of the embedded real-time database, analyzes its key properties including real-time transaction processing, concurrency control, recovery management, etc., and finally proposes applicable testing strategy and methods which have been proved in the actual test, being as a technique to evaluate the performance of the embedded real-time database.
Schedule Optimization of Time Petri Nets Based on Ant Colony Systems
Authors: Liu Xian Ming , Pan Li , Zheng Hong
Published: December 2012

This paper presents a time Petri net model with the optimizing mechanism based on ant colony systems that addresses the problem of schedule optimization. The choice rules and pheromone update rules of artificial ants are embedded into the evolution rules of a time Petri net, so the modeling and scheduling analysis of real systems can be integrated into the same model. Compared with the approaches based on the heuristic search and genetic algorithms, our method efficiently unifies the modeling and analysis of schedule problems based on a time Petri net.
Task Assignment for Multiple-Application Workload with Streaming Ones in MPSoC Using Shared Memory
Authors: Zuo Qi
Published: December 2012

Large scale Multi-Processor System-on-a-chip (MPSoC) based on Network on Chip (NoC) can support multiple applications running simultaneously. When the multiple-application workload includes streaming applications processing massive data, the communication concentrated on shared memory can't be ignored. In this paper, we propose a task assignment strategy for multiple-application workload which includes one streaming application on a NoC-based MPSoC. The proposed algorithm first assigns the streaming application centering the multi-port shared memory, and then assigns the other applications minimizing external communication congestion. By adopting the proposed algorithm, the memory-contention tasks are assigned to the PEs close to the shared memory and the overall congestion is minimized. This allows the system to provide better overall performance.
Testing Techniques of the Software Network Interface Based on the Capture and Analysis of the Packet
Authors: Du Song Yang , Wang Jia Si , Chen Zhong Wei , Ai Di Ming
Published: December 2012

Nowadays utilized through the network, the majority of the software has their own particular and complex network interface transmission protocols. Which makes the validation of the interface protocols becomes significant and difficult in the interface testing of the software. In this paper, the network interface protocol is analyzed to help validate the software network interface, based on the capture, analysis, construction and the transmission of the packet. By using this method, the software network interface will be more effectively tested.
Sampled Data Representation of Nonlinear State Delay System
Authors: Liu Qing
Published: December 2012

A state time delay always exists in practical systems. Analysis of the delay phenomenon in a continuous time domain is sophisticated. It is appropriate to obtain its corresponding discrete time model for implementation via a digital computer. A new method for the discretization of nonlinear systems is proposed in this paper. This method is applied to the sampled data representation of a nonlinear system with constant state time delay. The proposed scheme provides a finite dimensional representation for nonlinear systems with state time delay enabling existing nonlinear controller design techniques to be applied to them. A performance of the proposed method is evaluated using a nonlinear system with state time delay.
The RTP Encapsulation Based on Frame Type Method for AVS Video
Authors: Wu Wei Qiang , Wang Lei , Zhang Qin Yu , Zhang Chang Jian
Published: December 2012

According to the characteristics of AVS video data, a RTP encapsulation method based on frame type is proposed. When the video data is encapsulated by the RTP protocol, different types of video data such as sequence header, sequence end, I frame, P frame and B frame are encapsulated with different method. Under the limit of maximum transmission unit (MTU), sequence headers, sequence ends and I frames are encapsulated individually to reduce the packet length and protect the important data. While multiple P frames and B frames are encapsulated into one RTP packet to reduce the quantity of the RTP packets and decrease the overload of link. Simulation results show that, compared to the frame-based encapsulation method, the proposed method can reduce the packet loss rate of the video data effectively and improve the quality of video service.
Three Dimensional Visualization Technologies for Water Conservancy Works
Authors: Xie Nan
Published: December 2012

The advances in the study of three dimensional (3D) interactive visualization techniques in hydraulic engineering are reviewed. Main contents, key technologies and the difficulties with their solutions in the application of 3D interactive visualization techniques to water conservancy works are analyzed and summarized. A true 3D visual simulation system prototype for large-scale water conservancy project was built. A framework for building 3D visual simulation system for complex field data in hydraulic engineering is presented to illustrate potentiality and effectiveness of 3D visualization techniques for hydraulic engineering. Aspects like navigation and presentations of complex field data with spatial dependence are presented.
Time and Cost Management of Project Development Based on Cloud Computing Platform
Authors: Zhao Hui Juan , Tang Bing Yong
Published: December 2012

Procedure of constructing cloud computing platform is analyzed at first in the paper. Time and cost management during project execution are taken into account. The execution procedure is optimized and controlled according to critical path of cloud computing project. A case study is discussed and it is verified that time and cost control is helpful to project management in cloud computing platform.