bluuebunny/crossref_metadata_2025 huggingface dataset:
A Kind of Method to Parallelize AC Algorithm
Authors: Su Xiong , Ji Zhen Zhou , Lian Xiao Yang
Published: August 2013

AC algorithm is a multi-pattern matching algorithm. And AC algorithm is often used in the snort system for feature detection. However, as the amount of data increases and the real-time requirements, AC algorithm needs to improve the efficiency of the algorithm. In this paper, we designed a parallelized AC algorithm. It uses the pipelining method to improve the efficiency of AC algorithm. This method is very effective in multicore environments. At the end of this paper, through experiments, we compared the running time and the speedup between classical AC algorithm and parallel AC algorithm.
An Improved Niche Genetic Algorithm
Authors: Zhang Min , Zhang Xue , Zhang Yun Tao , Ming Jin
Published: August 2013

As a result of poor local research performance and short of the population diversity in niche genetic algorithm (NGA), an improved niche genetic algorithm (I-NGA) is presented in this paper. The algorithm adopts migration strategy, grading gradient method and gene equilibrium strategy, and it has better performance on accelerating the convergence rate and increasing the population diversity. This approach is used in Camel function for confirming. Through comparisons to NGA and I-NGA, the improved algorithm shows its better optimization.
Kinematic Analysis and Virtual Design of the Cutter of Seedling Vegetable Harvester
Authors: Guo Yi , Li Zhi Qiang , Tian Su Bo
Published: August 2013

[Purpose] To solve problems in design of the cutter for seedling vegetable harvesters, a cutter with a double-eccentric circle cam mechanism has been built. [Method] A mathematical model for kinematic analysis of cutters driven by a double-eccentric circle cam mechanism has been established. Under the model, Matlab has been employed to make kinematic analysis on displacement, speed and acceleration. Also, SolidWorks software has been adopted for virtual design of parts and assemblies of the cutter. [Results] The cutter has been applied to the seedling vegetable harvester for the experimental purpose and turned out to operate reliably and produce uniform height and leveling shearing fracture. [Results] This design will provide theoretical basis and practical reference for relevant researches.
Parallel Route Optimization Algorithm of Central Guidance
Authors: Chen Hong , Zhou Hu Xing , Meng Juan
Published: August 2013

To solve the problem that the central guidance system takes too long time to calculate the shortest routes between all node pairs of network which can not meet the real-time demand of central guidance, this paper presents a central guidance parallel route optimization method based on parallel computing technique involving both route optimization time and travelers preferences by means of researching three parts: network data storage based on an array, multi-level network decomposition with travelers preferences considered and parallel shortest route computing of deque based on messages transfer. And based on the actual traffic network data of Guangzhou city, the suggested method is verified on three parallel computing platforms including ordinary PC cluster, Lenovo server cluster and HP workstations cluster. The results show that above three clusters finish the optimization of 21.4 million routes between 5631 nodes of Guangzhou city traffic network in 215, 189 and 177 seconds with the presented method respectively, which can completely meet the real-time demand of the central guidance.
New Fuzzy Support Vector Machine Method Based on Entropy and Ant-Colony Optimization
Authors: Chen Hao Guang , Li Xiao Xi , Li Da Xi
Published: August 2013

Concerning the defect of fuzzy membership as a function of distance between the point and its class center in feature space for some current Fuzzy Support Vector Machines (FSVM), a new FSVM based on entropy and Genetic Algorithm (GA) named EGFSVM was proposed in this paper. Making use of evaluation of entropy and intelligence of GA, EGFSVM enhances the classification capability and makes clustering center more suitable and membership more accurate. Experimental results show EGFSVM has better precision and classification performance, especially to multi-class and large scale data.
Simulation and Application on Data Clustering Based on an Improved FCM Algorithm
Authors: Hu Xiang Ping
Published: August 2013

An improved data clustering algorithm was proposed based on the Fuzzy C-Means (FCM) algorithm for the purpose of clustering the data precisely and effectively, through progressing the performance of the data clustering to afford the element work for the application of fault diagnosis and target recognition and so on. There was fatal weakness for the traditional FCM algorithm that the algorithm is sensitive to initial value and noise. The chaotic differential evolution FCM algorithm was proposed according to the efficient global search capability of differential evolution algorithm and the traversal characteristic of chaotic time series. The improved algorithm used the Logistics chaotic mapping to search for the optimal solution, and the chaos disturbance was introduced into the evolutionary population to make up for the defects of FCM algorithm. The new method can overcome the problems of initial value sensitiveness with FCM and local convergence with genetic algorithm. Because the new method. Three types of typical vibration data of faults engines was taken as the example for the research and application. The simulation and application result shows that the data clustering performance of the improved FCM algorithm is much better than the traditional FCM algorithm, and the accuracy rates of fault diagnosis in the application was increased by more than twenty percent, it shows good application prospect.
Dynamic-Performance-Improved Algorithm for 14 Bits 200MHz Current-Steering DAC
Authors: Dai Lan , Xu Guo Zhi , Ning Ke Qing
Published: August 2013

Performance of high-speed and high-resolution current-steering DAC is hardly suffered from non-ideal factors such as current-steering source mismatches. This paper presents a dynamic performance improved algorithm for current sources selection of current-steering DAC, the most attractive features of the algorithm are random direction and random origination address during current sources selection. The simulation results show this algorithm enhances randomness during current sources selection and exhibits better dynamic performance than many other methods.
Point Cloud Segmentation Based on Moving Probability
Authors: Liu Shou Bin , Feng Kun
Published: August 2013

This paper presents a novel automatic algorithm for point cloud segmentation by using moving probability. An arbitrary point in point cloud is selected as the first seed point. Starting from the seed point, moving probability between the starting point and each of neighborhood points is estimated. Once one or more points with probabilities greater than a given threshold are identified, the starting point will move to these neighborhood points and new starting points are generated. Moving probabilities are estimated again and starting points move continually until all calculated probabilities are less than the threshold. Visited points are segmented from point cloud data. The second seed point is selected arbitrarily from the rest of points and the process is repeated. As a result, point cloud is segmented into individual feature regions. Experimental results show the effectiveness of the proposed algorithm.
The Implementation of Single Precision Sin&Cos Function on FPGA Based on the CORDIC Algorithm
Authors: Yu Bin , Guang Yang , Huang Hai
Published: August 2013

CORDIC Algorithm is widely applicable to the hardware implementation of DSP, and it attaches a great importance in many hardware implementations of DSP for a lot of arithmetic operations are simplified to simple addition operations and shifting operations. The FPGA implement of sine and cosine functions are achieved through CORDIC Algorithm in the paper, and the input and output data of the entire structure complies with IEEE754 standards. The basic theory of CORDIC Algorithm is introduced first in the paper, then the hardware iterative formula and the flow chart get out of basic formulas are given, and the structure of the design is introduced in detail, at last synthesis and simulation results are given.
Research on Smart Campus Based on Cloud Computing and Internet of Things
Authors: Nie Xiao
Published: August 2013

In recent years, cloud computing and Internet of Things have been the focus of research at home and abroad, the application of them is becoming increasingly wider, and smart campus is the outcome of the application of intergrading the cloud computing and the internet of things. In this paper we first introduce the application of the IOT and the cloud computing in education. Then we raise the model and application framework of smart campus. By the means of analyzing the model and application framework of smart campus base on the cloud computing and the internet of things, we study its function apply. At last we discuss the issues of smart campus to be widely applied.
Cross-Platform User Profile Matching in Online Social Networks
Authors: Liu Dong , Wu Quan Yuan
Published: August 2013

Nowadays, it is common that people have several identities in different online social networks where their identities information is stored as user profiles. Matching cross-platform user profiles becomes a spotlight in the future research. In the paper, we propose a profile matching framework. Depending on the format of each field, different string similarity measures are adopted. Meanwhile, each fields importance is considered. At last, we evaluate the effectiveness of our proposed methods by experiments.
Reducing Read Overhead in CCN Routers via Aggregating Interest Packets
Authors: Fan Jin Dou , Wu Hao , Lu Jian Yuan , Liu Bin
Published: August 2013

Content-Centric Networking (CCN) is proposed to make content, instead of the content locations, as the first-class entity in future Internet. Content can be cached in CCN routers for better data delivery, which makes in-router caching system more important. Content Store (CS) is the CCN in-router cache that caches all the data packets traversing a CCN router. Nowadays the throughput of IP routers can reach up to hundreds or even thousands of Gbps, which makes it a great challenge to design CS architecture in CCN routers to support high read/write throughput. In this paper, via aggregating the interest packets that request for the same data packets, we propose an aggregation scheme system, which can help to reduce the read overhead of the CS in CCN routers.
Design of Personalized Agricultural Information Recommended Based on Data Extracted
Authors: Yu Feng , Wang Xiao Ming , Zhang Qian , Luan Ru Peng , Liu Xin
Published: August 2013

In order to improve the accuracy and efficiency of agricultural information service, a personalized recommended service strategy is proposed, which based on data extracted. This recommended strategy combined the characteristics of farmers with agricultural information services, and improved the individual applicability of recommendation, also provided a new way to overcome the collaborative recommended sparse matrix.
The Design and Realization for Chinese Wireless Network Security
Authors: Li Zen Jun , Shang Wen Qian
Published: August 2013

With the popularization and development of computer network, people's life and work more and more relies on the network. However, many people can cause network security problems due to improper use. Therefore, based on the primary analysis of the current computer network security status, this paper proposes how to make the system strengthen, safety and how to carry out safety inspection after being attacked, in order to ensure the security of network.
The Effect of the Positive and the Negative Initial Values on Benard Fluid
Authors: Dai An Quan , Jia Chen Xia , Chen Xiang Yang , Chen Jian , Luo Bing
Published: August 2013

Benard convection model is a famous model in non-equilibrium thermodynamics. It had been widely studied, but we had found there are few of the studies on the effect of different initial values on Benard fluid. Benard convection model of free surface are established for simulating two dimension stable flow field with different Benard cells. When the Ra Number is varied between 10050 and 78725, the positive and the negative benard flow with 2 or 3 Benard cells are used as the initial value in the numerical simulation corresponding to the same conditions. Results confirm that the different initial values have no effect on the formation of stable Benard cells. This study is a successful application of numerical simulation in the issue of Benard.
Research on the Design Modes of Cloud Computing in Mobile Learning Systems
Authors: Liu Chan Juan
Published: August 2013

As a low-cost, highly effective network application model, Cloud Computing provides a variety of users with virtual and rich data and processing services including data storage , software downloads and maintenance, customer service, multimedia information resource and so on. On the basis of a brief description of cloud computing and its features, this paper focuses on design modes in mobile learning, and explores the educational environment of cloud computing.
A Research for Land Use Information System Based on GIS Technology: The Program in Simao District of Pu'er City
Authors: Xu Xin Hui , Xu Yan Hong , Zhao Xiao Qing
Published: August 2013

In this paper, the program in Simao district of Puer city is the object of this study, the latest investigation data of the land use status, the topographic maps and the rivers are chosen as the source data of this program. Under the support of GIS technology, we have a specific implementation of the Spatio-temporal data of the land use. The results of this research show that the land use information system based on GIS technology can provide an advanced system for decision-making to the land administration department.
Scalable Multimedia Archive Storage System Research
Authors: Zeng Sai Feng , Zhu Li Gu , Zhang Lei
Published: August 2013

In the traditional file system, The lack of contact between the file name and the data content led to waste a lot of availability storage space, especially in large data archive storage system. This paper designs and implements a scalable multimedia archive storage system, called IMCAS. IMCAS use CAS store the archive data and use real-time monitor program automatically extract metadata information. through dynamic loading extraction module, the system can support variety of multimedia form.
Research on Space System with ACP Method
Authors: Tang He Ran , Li Zhi
Published: August 2013

The ACP (artificial societies, computational experiments, and parallel execution) method, derived from parallel systems theory, belongs to the research field of meta-synthesis. During the past 10 years after it was proposed, ACP has been applied in transportation, agriculture and economics, demonstrating its advantages. In this paper, ACP is initially proposed to apply in research of space system in the hope that an artificial system can be built for tests, thereby providing guide to construction of real space system. Specifically, modeling of special unit is conducted with the Agent-based approach; high-performance computer is provided for computational experiment; and finally the real-time data published on web is used for parallel execution.
Progressive Transmission of Vector Curve Data over the Internet
Authors: Cao Zhen Zhou , Li Man Chun , Cheng Liang
Published: August 2013

This paper proposes a method for multi-scale representation of curve and elaborates the process of progressive transmission of curve data over the internet based on this method. Firstly, the importance degree of nodes and the information about public constrain points and monotone chains are stored in a monotonous linear BLG tree structure, and then the multi-scale curve is generated in real time based on this structure and the topological relationship is maintained by an optimized monotone chains intersection algorithm. Finally, the method was used in the experiment of progressive transmission of river network over the internet and verified its effectiveness.
Design of the Secure System and Research of the Hydromechanics Based on the Small Marine Equipment
Authors: Wu Zi Yue , Zhang Shuai , Gao Ting , Qi Jie , Zhang Weng
Published: August 2013

Small marine equipment works in the marine environment which are enduring the erosion of the big storms over a long period of time , this environment seriously affects the normal operation life. Designing a secure system can be widely used in the working process of small marine engineering equipment, the security system mainly uses sinking buoy as floaters which can sink and float in the sea. When bad weather comes, the system is sinking by the buoys to drive the marine equipment to avoid the adverse environment. Analyzing the stress of the secure system in water by using hydromechanics knowledge can improve the feasibility of design further, to ensure stable operation of secure system for the small marine equipment.
Software Structure of Embedded Test Device for High Performance Network over Coax
Authors: Shi Guang Hui , Yang Chun , Duan Xiao Hui , Song Ye Quan
Published: August 2013

HINOC (High Performance Network over Coax) is a coaxial cable network access system self-developed by China. In this paper, we discuss the software architecture of an embedded test device designed for it. The device integrates the functions of modem and terminal to help to solve the network problem. The software uses the hierarchical model to realize its multiple functions. The test results show that the design of device has a good performance.
A Modular Integrated Laboratory for Wireless Sensor Networks
Authors: Li Ming Xi , Xiong Yan , Huang Wen Chao , Zhou Xian Cun , Wu Xuan Gou
Published: August 2013

The Wireless sensor networks (WSNs) are rising research domain relate to several subjects and applications which consist of a large number of sensor nodes. Because of the universality of sensor network technology, it is difficult to teach students. To analyze pivotal technologies and didactical specialties and has explored functions, the system structure and experiments of sensor network synthetically laboratory. In the end, the article has given an example to illustrate the actuality and the tendency of sensor network synthetically laboratory.
Research of Existing Security Problems in E-Commerce Sites and Defense Technology
Authors: Fan Ji , Yong Fang
Published: August 2013

With the development of network, e-commerce has gradually become a new mode of human commercial activities. China's e-commerce is just beginning, and there are good prospects for development. However, with a growing number of users, the security issues become increasingly prominent. Now, to protect e-commerce sites and the users' information and property of these websites is a matter of great urgency. The paper analyzes security problems that exist in the e-commerce sites, and brings forward an improved BM-algorithm to solve these threats, which is named BMHSA algorithm. This algorithm can provide significant improvement in pattern matching performance.
Research on the Software Architecture of Information Systems Based on SOA
Authors: Wang Feng Qin , Li Qi , Liu Yu
Published: August 2013

Service-Oriented Architecture (SOA) is first introduced, and then the software architecture and development methods of information systems based on SOA are designed. Finally, the architecture and development methods are implemented in an enterprise information system, which can not only exchange and process a variety of information but also achieve real-time perception of information. The practice of the information system proves that systems based on SOA are of high reliability and security, good maintenance and expandability.
The Searching of Decision Tree Based on Data Mining
Authors: Ma Yu Ling
Published: August 2013

With the promotion of information technology in various fields, the amount of data grow crazily, how to find what we need in the information ocean is a problem to be solved, and the data mining technology has made the issue to be resolved. This paper introduced the data mining knowledge briefly, for example: set theory, decision tree, clustering and association rules, artificial neural network, genetic algorithm and so on, then analysis the method of decision tree in detail by example.
The Cooperation-Competition Model for the Hot Topics of Chinese Microblogs
Authors: Wu Wei Wei
Published: August 2013

The Chinese microblog (Weibo) grows quickly and eventually has been an essential tool for Chinese netizens. This paper proposes a cooperationcompetition model for the trend of the hot issues of Sina Weibo based on some hypothesis and parameter settings. After using the equilibrium solution theory of differential equations to solve the cooperationcompetition model, the appropriate strategies to control the trend of hot issues are stated.
The Design of Computer Integrated Control System for Electron Beam Welder
Authors: Ye Han Min , Liu Xiao Fei
Published: August 2013

Based on computer and PLC control technology, the control system for electron beam welder has been studied in this paper. By using PLC control technology to implement the intelligent control (IC) in welding process and adopting the high-frequency inverter technology, to realize the high-voltage interlock protection, the quality of electron beam current spot as well as the welding technology has been improved. Concerning the requirements on the technical and process, the design of computer communication and PLC application software demonstrate the feasibility of this method.
Security Threats and Countermeasures in the Internet of Things Based on RFID
Authors: Nie Xiao
Published: August 2013

Nowadays, the internet of things (IOT) has attracted the attention of the researchers. As a key technology of the Internet of Things, RFID (Radio Frequency Identification) has also attracted the interest of industry and academia. One of the most important issues for the applications of the IOT based on RFID is security. In order to promote the development of IOT based on RFID, first of all, we briefly introduce the IOT system components and work process based on RFID, and then we deeply analyze the security threats in the IOT based on RFID, by the means of these analysis we discuss the current countermeasures for the security threats of RFID. Aiming at the RFID system, the corresponding technologies are raised such as Tag killing, Tag sleeping and blocker Tag; and the authentication based on HASH is the main method aiming at the communication process.
Improved Top-k Query Processing on Uncertain Data
Authors: Zhang Shuang , Zhang Shi Xiong
Published: August 2013

Bottom-up algorithm, which is one of the two probabilistic Top-k query algorithms, was improved. The core of the bottomup algorithm is the iteration on the three courses of bounding, pruning,and refining towards the objects and instances. The main contribution is to change the iteration on instances of objects one by one into iterating all the instances of objects from the superior to the inferior;and to transform the condition and sequence of pruning in order to make the pruning more effective. Theoretical analysis and experimental results show that the algorithm efficiency could be obviously increased by about 20%.
Task Scheduling Algorithm Research in Grid Computing
Authors: Xu Yan
Published: August 2013

This paper studies effective task scheduling problem in the process of grid computing. Generally, task scheduling in the process of grid computing can be realized in shorter time, which guarantees the efficiency of task scheduling in grid computing. Traditional algorithm can not fully consider the resources load balance in calculating task scheduling in grid computing, resulting in network resources idleness. Finally, it can't reasonably use network resources. In order to avoid the above defects, this paper proposes a task scheduling method in grid computing based on double fitness particle swarm optimization algorithm. In the process of grid computing, channel perception method is applied to forecast the amount of grid computing tasks in the channel so as to provide the basis for task scheduling in grid computing. Realize task scheduling in grid computing by the use of double fitness particle swarm optimization algorithm. Experimental results show that under the condition of larger tasks of grid computing, the performance of task scheduling in grid computing by using the algorithm presented in this paper is superior to the traditional particle swarm optimization algorithm and can get ideal task scheduling result.
Protocols for Message Authentication from a Weak Secret
Authors: Guo Li , Yao Gang
Published: August 2013

An authentication protocol is a procedure by which a sender tries to convey n bits of information, which we call an input message, to a receiver. An adversary controls the network over which the sender and the receiver talk and may change any message before it reaches its destination. This paper deals with the simple scenario where two parties, Alice and Bob, communicate and want to assure that the message received by Bob is the one sent by Alice. Unconditional cryptographic security cannot be generated simply from scratch, but must be based on some given primitive to start with. In this paper, we introduce a message authentication protocol with unconditional cryptographic security. More precisely, we give protocols using a weakly secret key allowing for the exchange of authenticated messages.
Study on Loss Reduction of Large Scale Wind Power Concentrated Integration on Power System
Authors: Wu Xiao Dan , Liu Wen Ying
Published: August 2013

In this paper, starting from the active network loss formulas and wind characteristics, it is pointed out the reactive power loss and reactive flow is the major impact of wind power integration on power system loss. The reactive power loss formulas of box-type transformer, main step-up transformer, wind farm collector line and connecting grid line are analyzed. Next the reactive power loss of transformer and transmission line is described in detail. Then put forward the loss reduction measures that installing SVC on the low voltage side of the main step-up transformer and making the doubly-fed wind generators send out some reactive power at an allowed power factor. Use the case of Gansu Qiaodong wind farm to verify the effectiveness of the proposed measures.
Design of Large Consumer Electric Quantity Settlement System
Authors: Zeng Fan Jin , Ding Li , You Kai He
Published: August 2013

Having a good electric quantity settlement of large consumer is the basic work of electric power enterprises to receive fee in time and ensure the electricity supply. For the conditions that great labour intensity, calculation inaccurate, not timely settlement of traditional manual electric quantity settlement, this paper designs automatic electric settlement system. First, design database and logical structure based on the concept structural design with E-R diagram. Then, research the twelve mathematical formulas used by large consumer electric quantity settlement. Finally, describe the process of electric quantity settlement in natural language. The content of this study, aims to play the superiority of computer system, improve the informationize level of electric enterprises. And provide a practical technology and guidelines for the majority of electric enterprises and developers to develop large consumer settlement system.
Design of Low Power Lighting LED Driver with Multiplex Divided Constant Current Source
Authors: Yu Fei , Jie Zhao
Published: August 2013

Low power lighting LED has the advantages of low cost and good heat dissipation. But the current driver for this kind of LED does not have a good efficiency. In this paper a new kind of LED driver circuit was designed. By using current mirror and PWM technique, the circuit has good efficiency. By simulation with PSPICE, we can prove that the circuit has can divide current equally and has a good performance while the voltage source has some jitters.
Traffic Dispatch Policy in a Power-Aware Router
Authors: Kai Yi , Liu Bin
Published: August 2013

In this paper, we present a new traffic dispatch policy for a power-aware router, which was named GreenRouter and was proposed in our previous publication [. Packet processing capacities, mainly including IP lookup and forwarding engines, are shared and modulated according to traffic loads, unoccupied capacities are powered off in order to save power. A flow based traffic dispatch policy was proposed to allocate traffic from network interfaces to processing engines dynamically. Significant power saving has been achieved while QoS constrains have been satisfied. We present a new packet-based dispatch policy for GreenRouter in this paper, which can achieve more power saving. Reordering is adopted to avoid out-of-order delivery.
Semantic Color Retrieval of Color Image Based on Fuzzy Clustering
Authors: Wang Xiao Feng , Li Jian Hua
Published: August 2013

As next generation of the web, the semantic web aims at a more intelligent web severing machines as well as people, based on radical notions of information sharing and acquisition. For color image segmentation, semantic color is our focus. One method of color partition is fuzzy clustering which has been widely used in image segmentation. However, the fuzzy clustering algorithm is parameter sensitive, and lack of availability because of its initial focus on physical features. To improve the above problems, a novel fuzzy clustering method based on semantic color retrieval for image segmentation is proposed in this paper. The method is realized by modifying the membership function in the conventional clustering algorithm and by constructing the semantic color retrieval mechanism to achieve the semantic color extraction, which take human visual subjectivity into account in semantics. Experimental results show that the presented method performs more effectively than the previous algorithm.
Design of Serial Communication Based on VB and Mitsubishi Protocol
Authors: Sun Xiao Hua
Published: August 2013

PC-GOT-PLC is a popular automatic control system. Applied F940GOT and FX2N series PLC to system, without any mitsubishi's special communication board and under a very simple connecting mode, realized their mutual communication; System achieved the efficient, stable and reliable communication under simple attachment without any mitsubishi's special communication board. The communication applied mitsubishi FX series PLC programming interface protocol, no longer need to set up the D8120, simplified the PLC program; Under this protocol and based on VB6.0 development environment,write the serial communication program adapt to FX full series,the program make the PC can read/write the PLC soft equipment and forced ON/OFF directly. In the actual application, No matter accuracy and stability of communication were to achieve requirements of industrial control system.
Effect of Random Jitter on Performance of LDPC
Authors: Wang Zhi Jie , Hao Yan Yan , Lian Hui
Published: August 2013

Low density parity check codes (LDPC) by now is an excellent channel code that approaches Shannons limit. In order to get the effect of random jitter on performance of LDPC, a simulation model is constructed in this paper. Interpolation, filter delay and decimation methods are used to simulate random jitter induced by circuits of the receiver, changing filter delay to control the jitter step length. Thus the bit error rate of LDPC decoder is gotten that shows the sensitivity of LDPC to synchronization jitter. This paper concludes that, complying with channel coding block in DVB-S2, the bit error rate of LDPC decoder goes up on an exponential trend with the effect of random jitter simulation.
Face Recognition Based on LBP and Extreme Learning Machine
Authors: Wu Jing Hui , Han Lu , Li Jia Tong , Zhao Yi Xiao , Tang Lin Bo , Zhao Bao Jun
Published: August 2013

This paper proposes a face recognition algorithm based on the combination of local binary pattern (LBP) texture features and extreme learning machine (ELM). The face image is divided into several regions, and the LBP features are extracted from these regions and combined together to form a feature vector which will be the input data of ELM. It shows that ELM performs well in classification applications, and ELM and support vector machine (SVM) are equivalent from the optimization point of view. But ELM has milder optimization constraints and much less training time. Our experiments are carried out on two well-known face databases, and the results show that compared with compared to PCA+NN, PCA+SVM and PCA+ELM the proposed method can achieve higher recognition rates.
Simulation and Analysis of Impact Factor on Fuzzy PID Controller
Authors: Lu Xiao Ju , Li Jin Ping , Li Peng Fei
Published: August 2013

This report compares traditional PID controller and fuzzy PID controller with simulink on the basis of the control theories of traditional PID and fuzzy PID. In order to reduce the numbers of attempts, the simulation deduces one appropriate range of quantitative factor and proportionality factor under given object function through simulink. Simultaneously, this paper makes conclusion of influence of quantitative and proportionality factor to the system. In addition, this paper analyses the performance of quantitative factor and proportionality factor under specific external interference. The results of simulation show that appropriate quantitative and proportionality factors which have important affect on steady and dynamic characteristic of fuzzy PID controller.
A New Method to Analyze the Thermal Effect due to Plume Impingement on Communication Satellites
Authors: Xu Chun Sheng , Li Yang , Zhong Hong Xian , Gao Xiu Hui
Published: August 2013

Data fitting approach based on test data is commonly adopted on analyzing of thermal effect due to the thruster plume impingement on communication satellites, however, the existing methods are only available for the appendages which are regularly shaped or could be formulated. In this paper, a plume impingement analyzing approach for irregularly shaped appendages is present. The STL (Stereo Lithographic) data is firstly derived from the three-dimensional model of the appendages. Then the STL data are made a kind of interpolation to get small particle size in order to obtain a precise analyzing result. Finally, the normal vector and the location of each triangle grid are obtained from the STL data to form a new model for plume impingement analyzing on irregularly shaped appendages. The new method is proved correct by comparing with PLUME software and the method given in [4].The application range of analyzing exhaust plume impingement on communication satellites can be widely extended by the proposed method.
Design and Implementation of Signal Generator Based on DDS
Authors: He Hong , Zhang Jin Zhou , Zhang Zhi Hong
Published: August 2013

A signal generator with adjustable frequency, phase and duty cycle is designed in this paper. The design of this signal generator is based on the technology of direct digital synthesis (DDS).The classic structure of DDS is presented and its principles are introduced in detail. The key modules of the design such as phase accumulator and pulse width processing are implemented by verilog HDL language. With suitable FPGA, the designed signal generator and all modules of the design are simulated successfully in Quartus II.
Video Tracking of Human with Occlusion Based on MeanShift and Kalman Filter
Authors: Yuan Bao Hong , Zhang De Xiang , Fu Kui , Zhang Ling Jun
Published: August 2013

In order to accomplish tracking of moving objects requirements, and overcome the defect of occlusion in the process of tracking moving object, this paper presents a method which uses a combination of MeanShift and Kalman filter algorithm. MeanShift object tracking algorithm uses a histogram to describe the color characteristics of an object, and search the location of an image region that the color histogram is closest to the histogram of the object. Histogram similarity is defined in terms of the Bhattacharya coefficient. When the moving object is a large area blocked, the future state of moving object is estimated by Kalman filter. Experimental results verify that the proposed algorithm achieves efficient tracking of moving objects under the confusing situations.
PSO Based Self-Tuning PID Pitch Control for Wind Power Generation System
Authors: Zhou Hao , Qin Bin , Li Ran , Xu Hai Jun , Cao Ming Feng , Wang Xin
Published: August 2013

Most variable speed wind turbines have pitch angle control mechanisms and one of their objectives is to protect turbines when the wind speed is too high. Pitch angle control is the most common means for adjusting the aerodynamic torque of the wind turbine when wind speed is above rated speed. The paper deals with optimal tuning of a PID controller for pitch angle control in wind turbines using particle swarm optimization (PSO) algorithm. The particle swarm optimization is used for achieving the correction coefficient values of deviation which are sent to the controller so that the control effect of chlorination system is improved. Simulation results prove the effectiveness of proposed control strategy. System can eliminate the wind speed disturbance and provide good transient and robust performance.
Fuzzy Enhancement Method for Color Medical Images Based on Color Space Conversion
Authors: Hua Liang , Zhou Zhen Tao , Yang Ji , Feng Hao , Ding Li Jun , Gu Ju Ping
Published: August 2013

A new fuzzy enhancement method is put forward in the paper combining with Young-Helmholtz (Y-H) color space and fuzzy set theory. Color images with RGB tri-channels are transformed into Y-H color space by using Greaves transformation method. The colors image could be decomposed into chromaticity numbers matrix and intensity numbers matrix. The intensity numbers matrix is processed by using fuzzy enhancement arithmetic, while chromaticity numbers matrix keeps invariant. The primary chromaticity numbers matrix and enhanced intensity numbers matrix are processed by using Y-H inverse transformation. The method put forward in the paper have characteristics of efficiency, convenience and high speed. The method can achieve enhancement for color medical images without changing hue and saturation.
Wavelet Denoising-Based Image Feature Extraction by Independent Component Analysis without Pre-Whitening
Authors: Tang Xing Jia , Zhang Xiu Fang
Published: August 2013

This paper proposes an ICA image feature extraction method without pre-whitening based on wavelet denoising. Firstly, we conduct denoising for noisy observed images with wavelet transformation; then the feature extraction for denoised observed images is done by using FastICA algorithm without pre-whitening; finally, we further remove the residual noise in extracted feature images with wavelet transformation. Simulation experiment results show that this method is apparent in the performance of denoising, meanwhile, the extracted feature images can distinguish the texture and shape feature well, which has stronger practicability and validity.
Vehicle Detection Method under Night Circumstance
Authors: Guo Lin , Shen Xiang Hui
Published: August 2013

In intelligent vehicle detection, vehicle detection at night especially detection in the condition of urban street always remains a problem. This paper proposes an effective vehicle detection algorithm. Firstly it extracts effective vehicle edge by the method of embossment which eliminates light interference. Then we detect the vehicle moving area by frame difference method and calculate the threshold by OTSU algorithm. Finally the noise points are removed by erosion and expansion. This method can better extract the moving objects.
Face Detection System Based on AdaBoost Algorithm
Authors: Shi Lan , Lv Jian Hui
Published: August 2013

In order to do further research on face recognition, this paper constructs system software work environment on the hardware platform, and then AdaBoost algorithm is given and transplanted into this system. According to the detection speed of the system and the detection rate, this paper does simulation results, it shows that the speed of each frame image detected by the system is about 110 to 130 milliseconds, and the detection rate of face rotation of small range is 85% or more, which shows the system can meet the practical needs and has widely application.
The Research and Implementation of RRC Layer Connection Reconfiguration in TD-LTE System
Authors: Liu Yu , Miao Qing , Qiu Zhi Hui
Published: August 2013

In the TD-LTE system, RRC (Radio Resource Control) layer plays a very important role as the control center in the whole higher layer protocol. This paper introduces the function of RRC layer and mainly focuses on the RRC layer connection reconfiguration. This paper also illustrates design of function, signaling process and uses the third party terminal and tracking software to calculate the corresponding diagram in the domain of log, which checks the implementation of RRC layer connection and reconfiguration.
Research on Anti-Jamming Algorithm Based on Beidou Satellite Navigation System
Authors: Zheng Xiao Zhe , Liu Yu Hao , Lv Cui Gai
Published: August 2013

According to the four array elements of Beidou satellite navigation model as the research object, put forward a kind of Compass satellite navigation signal model construction method, and using Matlab software to build the satellite navigation signal system model . Based on the power inversion principle, try to use the recursive least squares (RLS) algorithm for getting the power inversion Optimum weights, compared and evaluated in terms of this performance. The results show that the power inversion based on RLS algorithm can make the antenna array in the direction of interference to automatically generate nulling .And compared with LMS power inversion array algorithm, RLS algorithm in interference can form deeper nulling. The disadvantage is computationally intensive.
Research on Radar System of Hardware-in-Loop Simulation
Authors: Jun Luo , Shan Zhang Ji , Jun Lu Wen , Xi Sun Shuang , Hui Pe Dong
Published: August 2013

This paper studies the C/S architecture, and designs a set of teaching and training for hardware-in-loop simulation system. System consists of an antenna, shelters, and other presentation models, master and client components, mainly to complete radar system functional demonstration, radar signal release and capture functions. Experimental results show that the system reaches a very good teaching training effect.
Optimization and Application of FinishMills Temperature Control in Hot Strip Mill
Authors: Guo Qiang , Zhang Bo , Ling Zhi , Shentu Nan Kai , Zhang Hui , He Zi Yang , Zhang Yong
Published: August 2013

in this paper, the author used method of Two-dimensional finite difference to establish a model of temperature in hot rolled steels in finishing stands, and used explicit difference method to solve the difference model. The model was optimized by correct parameters through particle swarm optimization combining with measure data. It has been verified that the deviation of the models prediction and real data keeps between ±10°C.
Combustion Synthesis of TiB2-TiC Ceramic
Authors: Li Su , Li Jun Shou , Zhao Fang , Wang Ming Yuan
Published: August 2013

TiB2-TiC multiphase ceramics were prepared through altering the molar ratio of Mg and C and leached with suitable acid by the combustion synthesis reaction of Mg, C, TiO2 and B2O3. The samples were investigated by XRD and SEM, and the results showed the diameter of the TiB2 was 1.5μm and the shape of the TiC was irregular spherical particles. The diameter and the proportion of the TiB2 were increased with the increase of Mg powder. The formation mechanism of TiB2 has been studied. The optimized proportioning of the molar ratio of Mg and C was 3:2.
Risk Assessment on Beijing Urban Infrastructure Vulnerability
Authors: Jia Qun Lin , Bai Peng Fei , Duan Qian Qian
Published: August 2013

In this paper, a comprehensive evaluation indicator system of urban infrastructure was constructed, and a vulnerability assessment model of urban infrastructure based on AHP method was developed. Taking Beijing as an example, an empirical research based on the date of Beijing urban infrastructure in 2008 was conducted. The research in this paper is a useful exploration on vulnerability assessment, which can provide the foundation and support for governments decision-making on urban disaster prevention and mitigation.
Risk Management Research of Financial Market Based on Dynamic Copula Model
Authors: Chai Yi Xian , Xu Yan Li , Liu Dan
Published: August 2013

Copula model and the application of the model in financial market risk management are discussed in this paper. The paper establishes a dynamic Copula model to solve the financial market risk management problems on the basis of Copula research. Through the use of statistics and financial theories and Copula model, the thesis studies the applications of Copula model in the financial risk management and resolves the problem whether there exists financial crisis contagion or not. The results indicate that the applications of model in the financial market risk management are effective, and the research on the problem should be done in-depth.
Scope Changes Impact on Book Performance of Consolidated Financial Statements
Authors: Xia Lian Feng
Published: August 2013

Currently, listed companies in our country generally draw up consolidated financial statements according to the new accounting standards requirements, and release consolidated financial statement to investors and relevant financial statements users so as to public company financial information. Consolidated financial statements can comprehensively reflect the financial position and operating results of listed companies. The key basic work of consolidated financial statements preparation is to reasonably determine the consolidation range of consolidated financial statements. Although the current new accounting standards have stipulated consolidation range, the new accounting standards has not specified the substantial control of concrete measurement method problem. So this paper takes one listed companys financial report and related data from 2007 to 2011 as data sources,selects listed enterprises with no clear merger reason as research object. Multivariate linear regression model is adopted to analyze the influence of merge scope change on book performance. The results show that the consolidated range change will change enterprises book report data,and the influence average value of book achievement is about 10.72%.
Coordination of the Closed Loop Supply Chain with Retailers' Competition
Authors: Wang Ting
Published: August 2013

To reflect the coordination in the supply chain of perishable products with free competition, a single manufacturer and two retailers supply chain model facing the stochastic demand in relation with different prices and the return mechanism is established. The analysis shows that the profit of total supply chain without competition is obviously fewer than that with competition, and through the special linear model the paper employs the result, also gives the optimal price and order quantity in the coordination of the supply chain.
The Strategy Cooperation Research of Enterprise under the Internet Environment
Authors: Wu Hong Gang
Published: August 2013

Today the Internet has become one of the main media between consumer consumption and information exchanges. Nowadays many business conducts are gradually transferred to the network. They initiatively surf the Internet to find the information which is related to their life, and it has become one of the main part in a day. This study used the cooperative model of Shapley value. And according to the reasonable hypothetical profit value, it simulated and analysis out the distribution of cooperation profit. This study found that the cooperative model can equally distribute the cooperative interests between each other, and so the strategic alliances can be realized. The research results can be used as the strategy cooperation reference of the enterprise under the Internet environment.