Computer and Modernization

Digital Modulation Signal Recognition Based on SVM

LI Yan-ling;LI Bing-bing;LIU Ming-qian;YIN Chang-yi

2011, 1(3): 1-4. doi:10.3969/j.issn.1006-2475.2011.03.001

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Aiming at the two shortcomings of easy to fall into local minimum and inappropriate for small sample of neural network classifier, a new method of modulation recognition for digital signals is proposed using zero-center instantaneous features extraction to extract characteristics and based on support vector machine (SVM). Compared with traditional algorithms based on neural networks, this algorithm has better generalization ability. Computer simulation results indicate that the method has the high recognition rate with less samples.

Application of Ontology-based Intelligent Query in Analyzing Changes of Polar Ice Sheets

WANG Bin;GUAN Ze-qun;NI Cui;ZHU Su-juan

2011, 1(3): 5-8,14. doi:10.3969/j.issn.1006-2475.2011.03.002

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With the launched satellite and its onboard ICESAT space-based laser altimeter systems GLAS in United States in 2003, the study of polar ice sheets via the data intensively collection is valuable and important in order to achieve mass balance of ice sheets, earth’s gravity field change and the level of rising global sea, etc. The paper uses geo-ontology which is developed from philosophy and information science technology to analyze the change of polar sheets and to provide the intelligent access services. At the same time, ontology intelligent optimization and semantic query expansion are discussed based on constructing geographic knowledge database. The research shows that it is feasible to retrieve the change of polar sheets with the application of geography ontology.

Design of Apparel Style Knowledge Database Based on Machine Learning

TANG Lin;CHEN Jian-ming;SHANG Xiao-mei

2011, 1(3): 9-11,1. doi:10.3969/j.issn.1006-2475.2011.03.003

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The development and application of clothing manufacturing process management and control system based on machine learning can get rid of manual mode in clothing manufacturing process for a long time, shorten the production cycle, and achieve intellectualized manufacturing. The realization of the intellectual manufacturing is depended on the corresponding knowledge database information support in clothing manufacturing process. As an indispensable part in clothing manufacturing process, style designing also needs the support of information in style knowledge database. The apparel style knowledge database system design principle, design method, and its application are mainly described.

Neural Networks Ensemble Based on Fuzzy Cluster

HUANG Wen-tao;BAO Hong;ZHANG Jing

2011, 1(3): 12-14. doi:10.3969/j.issn.1006-2475.2011.03.004

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Aiming at diversity being an important condition of the ensemble learning, this paper studies the method for improving diversity of the neural networks ensemble based on fuzzy cluster algorithm. At first, a lot of weak classifiers weights and thresholds are collected as the original data of the fuzzy cluster algorithm. And then the individuals of the nearest clustering center are selected to make up of the memberships weights and thresholds of the ensemble learning. Finally, the experiment results prove the effectiveness of this method.

Implementation and Analysis of N Queens Problem with Java Language

WU Hong-ping

2011, 1(3): 15-16,2. doi:10.3969/j.issn.1006-2475.2011.03.005

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This paper uses a simplicity backtracking algorithm, presents a complete Java program for N queens problem, and the time cost about this program is exactly counted.

Improved Mining Method for FLWAP on Web Access Sequential Pattern

WANG Hai-bo;CHEN Zhi-guo;XU Yi-qiu;LI Peng-xuan

2011, 1(3): 17-20. doi:10.3969/j.issn.1006-2475.2011.03.006

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In order to improve the efficiency and performance of mass data mining for FLWAP-mine algorithm, based on reducing the time of scanning the database and the Apriori properties of sequential pattern, the FLWAP-mine algorithm is improved. It constructs the projection tree by scanning the database once, and then deletes the non-frequent events from the projection tree by pruning. The improved FLWAP-mine algorithm adopts the idea of the projection tree to search the projection tree of the current pattern, reduces the search area by pruning the projection tree. The experimental results show that the improved FLWAP-mine algorithm performs better than the previous one when the data set is large or the minimum support threshold is small.

Visual Saliency Parameter Tuning

LI Rong;Jorg CONRADT;ZHU Fang-lai

2011, 1(3): 21-24. doi:10.3969/j.issn.1006-2475.2011.03.007

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Saliency-based visual attention model is widely used in recent years. Saliency-based visual attention allows for seemingly real-time performance by breaking down the complexity of scene understanding into a fast temporal sequence of localized pattern recognition problems, in a computationally efficient manner. Based on Itti’s visual attention model, this paper evaluates the effects of specific parameters on the performance of saliency map. Statistical methods are applied to choose optimal parameters, which allowed to improve the performance of saliency map. Some experimental results show that the method can quickly and accurately detect targets in a complex background.

Design of Agent-based Modeling Structured Artificial Social System

ZHOU Wei

2011, 1(3): 25-27. doi:10.3969/j.issn.1006-2475.2011.03.008

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In recent years the study of Agent-based modeling (ABM) makes a notable progress. It acquires highly attention in the field of artificial social system study by using ABM. This paper presents the main process of building artificial social system with Agent-based modeling, and describes a structured artificial social system platform in detail. The phenomenon of community modularity convergence is demonstrated in the artificial social system platform. The prospect of artificial social system by using ABM application and its challenge are discussed for future study.

Combined Algorithm for Training RBF Neural Network Based on Immune Genetic Algorithm and Gradient Descent

LONG Hua

2011, 1(3): 28-32. doi:10.3969/j.issn.1006-2475.2011.03.009

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Besides the ability of stochastic global searching of simple genetic algorithm(SGA), the immune genetic algorithm(IGA) draws into the mechanisms which exist in biological immune system such as immune memory, immune regulation and antibody diversity. The deficiencies of gradient descent method include the slow speed of convergence, the problem of local minima and the great influence of initial parameters on the performance of the network. This paper proposes a new algorithm based on the IGA combined with gradient descent, and applies the new algorithm in the training of RBF network. The experimental results show the algorithm performs well, and it performs better than SGA combined with gradient descent.

Application of MVC Design Pattern in PHP Development

DAI Yi-ping

2011, 1(3): 33-37,4. doi:10.3969/j.issn.1006-2475.2011.03.010

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The integrated development environment Zend Studio is introduced by examples to the MVC pattern in PHP development, through the understanding and use of MVC pattern, the software can be a good modular, separation system, said data control and data functions, in favor division of labor between development teams and cooperation, especially in the development of large complex projects, this mode helps speed up the progress of the project, shorten development cycles, enhance software maintainability and code reuse, increase development efficiency and project quality.

Overall Framework of Trans-department Data Shared Platform and Its Function Analysis

KANG Wen;HE Yao-guang;ZHAN Xian-xin;DENG Lun-qiang

2011, 1(3): 38-43. doi:10.3969/j.issn.1006-2475.2011.03.011

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With the rapid development of E-government in our country, it has become a task of top priority to solve the issues of deficiency on information resources effective sharing, difficulty in business coordination, reduction of investment risk and raise of investment efficiency. This paper proposes the new idea of building a shared platform for trans-department data.

Integration and Its Application of Formal Methods and Visual Models

WU Shuai;MIU Li-jun

2011, 1(3): 44-46,5. doi:10.3969/j.issn.1006-2475.2011.03.012

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The thesis represents the features and defects of formal method, analyzes the necessity of importing visual models in the formal development process, provides the process of integration of B-method and UML, which reduces the difficulty of making use of formal method directly, illustrates the application process by a case of automatic teller machine.

Application of Two-dimensional Spatio-temporal Continuous Wavelet in Object Tracking

TANG Yu-jun;WANG Rui;ZHAO Yan

2011, 1(3): 47-51. doi:10.3969/j.issn.1006-2475.2011.03.013

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The continuous wavelet transform is widely used in image processing, especially in the area of object tracking. Currently the most popular wavelet used in object tracking is Gabor wavelet, Morlet wavelet and so on. This paper puts main attention on the theory and the implementation procedure of the object tracking process using two-dimensional spatio-temporal continuous wavelet, brings this wavelet transform to the tracking of small target and infrared target, and a good tracking result is obtained.

Analysis of Principle and Performance About AZB Detection Algorithm for H.264/AVC

LIU Zhi-cheng;ZHOU Qi-ya

2011, 1(3): 52-56. doi:10.3969/j.issn.1006-2475.2011.03.014

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Conducting the all-zero block (AZB) detection before the transform and quantization may save the time needed for DCT transform operations, which are intensively time-consuming, and can not affect the encoding quality. The technique of AZB detection is widely used in real-time encoding occasion. This paper is focused on analysis of the principle about AZB detection algorithm for H.264/AVC. The general model of AZB detection is presented. A few AZB detection algorithms for H.264/AVC are compared in detection rate and time performance, which provide the basis for investigators implementing or selecting their appropriate AZB detection algorithm in real applications.

Image Segmentation Method Based on Statistical Model of Noise

HU Xiao-dan;TENG Zhong-jian

2011, 1(3): 57-59. doi:10.3969/j.issn.1006-2475.2011.03.015

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This article proposes a model based on the statistical features of noise to improve image segmentation. After a brief review of the current image segmentation and noise reduction methodologies, it presents a new model to improve image segmentation. In the new model, it preserves the original image with the noise and takes the noise as part of the region features to produce the better segmentation results.

Binary Image Encryption Algorithm Based on Chaos and Walsh Transform

ZHANG Ya-hong;LI Xin-wei;CHEN Hui

2011, 1(3): 60-62. doi:10.3969/j.issn.1006-2475.2011.03.016

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A binary image encryption algorithm based on chaos map and discrete Walsh transform is proposed. Firstly, chaos sequence is used to encrypt the image, then the encryption image is scrambled by the discrete Walsh transform, which can achieve high-strength encryption. The discrete Walsh transform can save computation time greatly. The simulation result shows that this algorithm has high quality of secrecy as well as short computation time.

An Improved Median Filter Denoising Based on Edge Detection

ZHANG Mao-nü;LIU Wei

2011, 1(3): 63-65,7. doi:10.3969/j.issn.1006-2475.2011.03.017

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To remove impulse noise, median filter is a valid method which is applied in a wide range of real life. Conventional median filter in denoising images loses the edge information easily while images are denoised. This paper presents an improved edge detection-based median filter algorithm. It first detects edge information of noisy image, and then edge information is saved, and then the original noisy image is denoised with median filter, for the edge information which is preserved before denosing; with a small template to remove the noise, then uses it to replace the edge information which is denoised by median fliter. Finally, through experimental verification, the denoising algorithm can be better in preserving edge information while images are denoised.

Design of Manufacturing Enterprise IT Services Platform

GUO Ling

2011, 1(3): 66-69. doi:10.3969/j.issn.1006-2475.2011.03.018

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IT construction of a manufacturing enterprise changes its center from business process management to knowledge management. In response to this request, this paper presents a manufacturing enterprise IT operating platform design. Based on the fundamental system, some customized value-added sub-modules are increased, including: the definition of information policy subsystem, Internet information capture subsystem, the information research and development collaboration subsystem, cross-sectoral knowledge management coordination subsystem. The platform plays an effective role in decision-making support for cost control, technology updates, market development in the enterprise.

Building Equipment Management Information System of Tobacco Enterprise

YUAN Zhen-wei

2011, 1(3): 70-73. doi:10.3969/j.issn.1006-2475.2011.03.019

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The whole equipment management information system is built through the integrated manner. The paper describes the subsystem function, relationship and integrated method in the system.

Design of Wireless Sensor Network Node Based on Embedded Systems

KE Yu-ling;WEI Zhen

2011, 1(3): 74-77. doi:10.3969/j.issn.1006-2475.2011.03.020

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This paper discusses the design proposal of wireless sensor network node based on embedded systems. Wireless sensor network nodes which are constructed by ARM7 CPU and chip CC2420 wireless communication working under the 2.4GHz frequency band are made use of a modular design. The working principle and hardware design of every parts is discussed in details, and test procedure flow chart of the node is provided.

Research on IPv4/IPv6 Dual Protocol Stack Based on Ethernet Switch

ZHOU Jin-jin;JI Meng;

2011, 1(3): 78-80,8. doi:10.3969/j.issn.1006-2475.2011.03.021

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This paper introduces the working principle of dual protocol stack and the related application models, then analyzes the work mode of IPv4/IPv6 dual protocol stack, and finally gives specific implementation and verification based on carrier-grade Ethernet switch platform.

Vertical Handoff Technology for Heterogeneous Wireless Network

CHEN Yong-sheng;LU Yu-kai;WU Li-di

2011, 1(3): 81-84. doi:10.3969/j.issn.1006-2475.2011.03.022

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Along with each kind of heterogeneous wireless network appearance one after another, many kinds of wireless network convergence foundation's vertical handoff technology has received widespread attention of the academic and the industrial world. Therefore, the next generation wireless network (NGWN) must support the vertical handoff technology to ensure that users can switch from a network to another or from one kind of transmission medium to another when maintained the continuity of the exist correspondence. This paper carries on the summary analysis of the present vertical handoff technology basic philosophy and the existence difficulty, simultaneously introduces a vertical handoff decision strategy using many kinds of decision factors, and elaborates its core thought and the handoff process.

Power Mechanism of Carrier Ethernet Switch and Its Implementation

YANG Bo;DONG Xi-ming;

2011, 1(3): 85-88. doi:10.3969/j.issn.1006-2475.2011.03.023

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Traditional Ethernet is merely used in data transmission previously, so that the Ethernet device must work with own battery or external supply adapter, which increases the difficulty of wiring work. The standard which Ethernet can also deliver DC power supply in data transmission line is defined in IEEE 802.3af, promulgated in June, 2003, it can not only reduce network construction costs and simplify wiring works, but also resolve the compatibility problem of various vendors equipments. Based on the research on key technologies of IEEE 802.3af, this paper implements the function of supplying power to powered devices.

Design and Realization of Telecom Broadband ADSL Health Records System

XI Hai-ting;SHI Yong-ge;WANG Yang

2011, 1(3): 89-91. doi:10.3969/j.issn.1006-2475.2011.03.024

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In recent years, telecom operators broadband subscribers are rapidly growing in the number. Data communications sustainable growth makes the quality of broadband subscriber line becomes the most important problem. The paper detailedly analyzes the related requirement, designs and implements a system based on .NET platform, which includes analysis modules like the ITV consumer and the user want to change rate, so as to provide effective data analysis platform for the telecommunications staff.

Driver and Research on Full Flexibility QinQ Based on Marvell Chip

LIU Qi

2011, 1(3): 92-94,9. doi:10.3969/j.issn.1006-2475.2011.03.025

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In metro Ethernet networks, the driver and implementation of flexible QinQ are studied. With IEEE 802.1Q and its extension protocol, and in accordance with the different needs of operators, it has been classified on the QinQ. In detail, it shows the encapsulation and termination of QinQ. It also tells the application of flexible QinQ. Finally, the operators can control various types of traffic by operating QinQ.

Research and Realization of NAT Traversal Solutions in VoIP System Based on ALG

ZHAO Hui;LOU Xin-yuan;YANG Qing-wei

2011, 1(3): 95-97. doi:10.3969/j.issn.1006-2475.2011.03.026

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During the VoIP communication, the address information carried by H.323 protocol traveling the NAT, decoding-all method with lower performance is used in the traditional performance of ALG solution. To optimize performance, the paper analyzes the ALG technology and gives a decoding method using on-demand which only decodes the address information of the message instead of re-encoding all. A comparison experiment is carried out which shows that the time of decoding on-demand is about 1/75~1/80 of the decoding-all solution. The problem of low efficiency of ALG treatment is optimized.

Application of Data Fusion Technology in Optical Measurement

XIONG Zhi-hui

2011, 1(3): 98-101,. doi:10.3969/j.issn.1006-2475.2011.03.027

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Because of deficiency about traditional trajectory data processing, multi-station rendezvous measurement is proposed. Based on crossplot result, the trajectory of ballistic missile is found out by data fusion algorithm. The test result is analyzed on accuracy. This approach fully utilizes the information of the multi-station, greatly improves identification precision of air targets.

Application of Variable Universe Fuzzy-PID Control in Hi-temp Muffle Resistance Furnace

LIU Xiang;ZHOU Xin-zhi

2011, 1(3): 102-104,. doi:10.3969/j.issn.1006-2475.2011.03.028

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As the controlled object is hi-temp Muffle resistance furnace, the paper mainly discusses how to combine variable universe algorithm and fuzzy-PID control algorithm in the temperature-rise period of Hi-temp Muffle resistance furnace to achieve variable universe fuzzy-PID control. The variable universe fuzzy-PID control can ensure the faster response, less overshoot and better ability of anti-jamming in the harsh temperature environment. In the end, it designs a variable universe fuzzy-PID controller which based on variable universe fuzzy-PID algorithm and simulates the whole system in the Simulink environment on Matlab, compares variable universe fuzzy-PID with fuzzy-PID, the simulation experiment proves the variable universe fuzzy-PID has better performance parameter and control effect.

Design of Temperature Controlling System Based on TMS320VC5402

ZHANG Jing-jing;DA Xin-min;GUO Bin

2011, 1(3): 105-107. doi:10.3969/j.issn.1006-2475.2011.03.029

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Based on DSP chip TMS320VC5402, this paper designs the temperature switching controller by using the characteristics and principles of digital temperature sensor DS18B20. Beginning with the hardware descriptions of it, the paper puts forward the whole design concept of the system, then the programs of temperature measuring and controlling service of switcher are finished by C language, at last the system on the chip of TMS320VC5402 is simulated.

Use of ZigBee in Heat-treatment Workshop Temperature Monitoring

LI Song-tao;LI Hao;LIU Wei-jun

2011, 1(3): 108-110. doi:10.3969/j.issn.1006-2475.2011.03.030

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Because of the low power consumption and high reliability, Zigbee is widely used in industry control. In view of this special situation, a real monitoring system based on ZigBee for furnace temperature in heat-treatment shop is designed. In this system, the mesh network nodes monitor temperature on real time, the data of collecting is sent to coordinator through wireless communication and processed by the software running on the server.

Vane’s Bionic Design and Finite-element Mechanical Analysis Based on TRIZ Theory

LI Man

2011, 1(3): 111-113,. doi:10.3969/j.issn.1006-2475.2011.03.031

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It is an important problem for improving the vane’s performance, rigidity and the stability of the wind turbine. There are many factors offering the inspiration for bionic design of the wind turbine. These factors include integrate of the organism’s form, function, structure and material, and the ability to adapt to the environment. The bionic process is an innovative and comprehensive analysis process. The TRIZ theory is applied to the wind turbine’s research process. The TRIZ theory can let people realize the necessity of the innovating and the development tendency of the wind turbine. It makes the research process more systematic and more regularity. This paper applies the TRIZ theory to count the wind turbine’s related data and to make a chart. Through contrasting the chart to the standard chart, the development stage and the development tendency of the wind turbine are found. Finally, through modeling and analyzing the fins, the mechanical data of the fins module can be got.

Elevating Quadratic with Shape Parameter of Bézier Curve

JIANG Yue-dao;BAI Gen-zhu;ZHI Wu

2011, 1(3): 114-116,. doi:10.3969/j.issn.1006-2475.2011.03.032

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This paper defines several new sixtic polynomial basis functions which are named the λQ—Bernstein basis function and they all have a shape parameter λ for quartic Bernstein basic function. These basis functions have a new feature and the function’s degree is elevated secondary once. Above all, these new basis functinons contain all properties of quartic polynomial basis function and the quintic polynomial basis function with a shape parameter. Based on these basis functions, the paper defines λQ—Bézier curve which not only contains a shape parameter λ, but also could improve the adjustability of the new curve. An important property is that the curve could better approximate to control polygon which is given.

Design and Implementation of Campus Novel Website

XU Jian-min;LIN Run-min;XIONG Jin-zhi;LIAO Zhi-liang

2011, 1(3): 117-120. doi:10.3969/j.issn.1006-2475.2011.03.033

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An important material carrier of Internet novel is Internet media. This paper illuminates the establishment of novel website through an example of the design and implementation of a campus novel website, according to the feature of network novel and some problems to establish a novel website. Novel website is the platform that is provided for student to read and publish novels by Internet technology.

Application and Research on Dynamic Page Generation by FreeMarker

QU Jian-ming;CHEN Jie

2011, 1(3): 121-123. doi:10.3969/j.issn.1006-2475.2011.03.034

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FreeMarker is a template engine writed by pure Java, it may dynamically build text output based on template and is often designed to build static HTML page. This paper, by building content and info HTML page for example, introduces functions and characteristics of FreeMarker template and studies its application direction, method and process.

Optimization of SQL Sentence for Oracle Database

ZHONG Xiao-quan;YE Meng

2011, 1(3): 124-126,. doi:10.3969/j.issn.1006-2475.2011.03.035

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In database application systems, performance becomes one of their main problems needed to be resolved with the increase of data in it. The optimization of SQL sentence is a main way to promote the performance of the system under the same hardware condition. This paper analyzes the execution processes of SQL sentence in Oracle database, compares the execution time and number of data blocks called in before and after of optimization to determine the optimal effect. Finally, the paper gets the SQL statement that time consuming less and data block calling less.

Construction of Common Document Parser Framework for Lucene

LI Hao

2011, 1(3): 127-130. doi:10.3969/j.issn.1006-2475.2011.03.036

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Lucene is an excellent technology frame of full-text retrieval engine of open source code. Firstly, Lucene, an advance full-text retrieval engine is introduced, system structure, running logic, and extend based on Lucene are analyzed in detail. Then for the Lucene document analysis in different types of deficiencies, a common document parser framework and practical examples are given.

Study and Implementation of JSP Without Component File Upload

CHEN Xiao-hua;TIAN Gang

2011, 1(3): 131-133. doi:10.3969/j.issn.1006-2475.2011.03.037

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The realization of file upload, its general idea is to acquire the client requests flow and to read the specified file from the input stream, and to pass this file save to the location specified. So, how to get designated content from the request message structure becomes the key problem. This paper gives a solution.

Design and Realization of Program for Real-time Monitoring Website and Data of Admission Office

LIN Qi-zhao;LI Qin-wen;ZHAO Guang

2011, 1(3): 134-136. doi:10.3969/j.issn.1006-2475.2011.03.038

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The paper introduces a program which can detect that the admission office Website can not be accessed and the admission data is incorrect in time, then sent a SMS to the administrator. The program acts on real-time monitoring the Website and data of admission office in practice. The program can be changed to real-time monitoring the others Website and data.

Design and Implementation of Organization Department of CPC Work Information Remote Transmission System Based on .NET Platform

HU Xiao-song;LUO Fen

2011, 1(3): 137-139,. doi:10.3969/j.issn.1006-2475.2011.03.039

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The design and implementation of a three-layer B/S structure .NET system is introduced. The sytem meets demands of Organization Department of CPC, including such as work information remote report, audit, classification, issue, scoring, etc. The system has good transplantability, expansibility and maintainability, and through actual application for two years, good effect has been obtained.

RSS Subscription Services Based on C# Language

ZHANG Dong-ping;GUO Dong-hui

2011, 1(3): 140-142,. doi:10.3969/j.issn.1006-2475.2011.03.040

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The RSS subscription service allows the visitors needn't use much time to browse the mass of information on the Internet, the providers of the RSS subscription collect and organize the information customized by the viewer, according to the desired format directly send to the viewer's computer. This article analyzes the structure of the RSS feed, designs a dynamic RSS subscription system based on the C# language. The system is used in Web site, and the result is good and satisfactory. It shows the advantages of real-time and unattended.

Design and Realization of Campus Network Information System Based on J2EE

GAO Hong-bo;ZHENG Xiao-lin

2011, 1(3): 143-146. doi:10.3969/j.issn.1006-2475.2011.03.041

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Along with the development of campus network, the traditional architecture does not content with the requirement of application exploitation. By analyzing of campus network information platform architecture, campus network information platform architecture based on J2EE is given with three layered architecture of J2EE, and characteristics of application are discussed.

Research on Using Matlab for Teaching “Digital Signal Processing”

HE Zhi-jie;LE Ren-chang;CHEN Jian-di;CHEN Qing-hua

2011, 1(3): 147-149,. doi:10.3969/j.issn.1006-2475.2011.03.042

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The curriculum of “Digital Signal Processing” that includes many concepts is so difficult that students are not easy to grasp. After introducing the software of Matlab in teaching theory and the practice, understanding and the digestion of curriculum concept become more easier. Guiding the students take Matlab as the auxiliary positively, writing corresponding procedure can confirm related principles. By writing projects, the ability of the students to solve the question independently strengthens.

Analysis of Signal Based on Wavelet

GUAN Ling-ling;LIU Zhong-xiao;ZHANG Shan-xin

2011, 1(3): 150-152. doi:10.3969/j.issn.1006-2475.2011.03.043

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After the introduction of wavelet concept, using wavelet transform, the paper analyzes a group of simulation signals, chooses suitable wavelet function, then processes and reconstructs wavelet. Comparing three kinds of signal denoised by Mexican hat wavelet, Shannon wavelet and Meyer wavelet, the paper verifies the existence of a big concern between the effect of filter and selection of wavelet type.

Joint Detection Technique Based on Different Background Noise

ZHOU Xi-liang

2011, 1(3): 153-155,. doi:10.3969/j.issn.1006-2475.2011.03.044

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The paper puts forward a simple and practical joint detection techniques, combines double-thresholds method based on energy and zero-crossing rate with subband energy method based on wavelet transform skillfully for voice signal endpoints detection, makes the best of double-thresholds method’s simple algorithm, good real-time, high accuracy rate and wavelet-zone energy’s good discrimination function from white Gaussian noise. Simulation result shows that the new algorithm can improve the endpoints detection accuracy rate of the detection system in the noise environment.

Research and Implementation of Automatic Generation in Online Examination System

GAO Xing-yuan;GU Hui

2011, 1(3): 156-158. doi:10.3969/j.issn.1006-2475.2011.03.045

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In order to improve the performance of automatic generation of online examination system, an algorithm of the edge of multi-parameter is designed. It is a great improvement in success rate and efficiency.

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