Computer and Modernization

Duality Analysis of Approximation Operations in Covering-based Rough Sets

CHEN Wen;LIU Shao-qing;ZHENG Ruo-yi;HUANG He-qing

2012, 203(7): 1-5. doi:10.3969/j.issn.1006-2475.2012.07.001

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Covering-based rough set theory is an extension of the classical rough set theory. In a variety of definitions of approximations operations, duality is always the focus of debate. This paper analyses duality of approximation operations through the definable properties of positive region, negative region and boundary region. With duality, this paper shows how to choose approximation operations for different applications. This paper also investigates the duality of approximation operations in reduct covering. Finally, the paper analyzes two pairs of approximation operations satisfying the duality in covering-based rough sets.

Application of a Genetic Algorithm with Improved Roulette Wheel Selection in Poisson Curve Settlement Forecasting Model

XIE Sheng-jia

2012, 203(7): 6-8. doi:10.3969/j.issn.1006-2475.2012.07.002

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Selection operator is one of the most important operators for genetic algorithms. It has significant influences on the population’s diversity and the convergent speed of the algorithm. This paper improves the roulette wheel selection operator, applies partitioning of fitness to individual selection of the population, proposes roulette wheel selection based on partitioning of fitness, and applies the approach to the optimization of the Poisson curve settlement forecasting model. The experimental results indicate that, this algorithm provides an effective approach for the parameter estimation of the Poisson curve settlement forecasting model.

Research on Time-cost Trade-off of Project Portfolio Based on Improved Ant Colony Algorithm

BAI Li-biao;BAI Si-jun;GUO Yun-tao

2012, 203(7): 9-13. doi:10.3969/j.issn.1006-2475.2012.07.003

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The time-cost trade-off based on the strategic orientation is one of the most crucial aspects of enterprise project portfolio planning that plays a key role in enterprise resources benefit maximization, which in fact is a multi-objective optimization problem. A new evolutionary algorithm-ant colony optimization (ACO) algorithm is employed to solve the time-cost trade-off problem. According to the ant colony algorithm existing precocious, stagnation, local optimal shortcomings, adopting certainty and uncertainty search rules and combining with chaos, an improved ant colony algorithm is proposed. Experimental results indicate that join chaos and search rules, the developed ACO can effectively improve global optimization ability, can draw better results in solving time-cost trade-off of project portfolio.

Solving Traveling Salesman Problem by an Adaptive Ant Colony Algorithm

LIANG De-sai;LIANG Gao-ye;WEI Si-qing

2012, 203(7): 14-16,2. doi:10.3969/j.issn.1006-2475.2012.07.004

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The traditional ant colony algorithm for TSP problem, convergence speed is slower and is easy to fall into local optimum. Aiming at the deficiency of traditional ant colony algorithm, the algorithm is improved, a kind of new self adaptive ant colony algorithm is put forward. Early in the search, pheromone volatilization coefficient is bigger then decreases to a constant value, ensure to search quickly at the early iteration stage and to search accurately at the late stage. The simulation results show that, the improved algorithm has faster convergence speed and higher precision.

A New Parallel Selfbalancing PSO Algorithm with Data Integer Programming

FANG Xin

2012, 203(7): 17-20. doi:10.3969/j.issn.1006-2475.2012.07.005

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To effectively solve the problem of the standard particle swarm (PSO) algorithm, which is the lack of diversity and not high accuracy, this paper uses multi-core systems and actual universities geographic coordinates. Then it gives an integer programming and parallel selfbalancing PSO algorithm to solving university path. Self-balancing mechanism uses parallel processing of multicore systems to generate independent sub-groups. Every sub-group can do parallel computation and finally generate the optimal path of the main group. It uses C++ programming in Visual Studio 2005 .NET to realize simulation. The results show that this algorithm improves the performance of the PSO algorithm from the solution accuracy and computation time which are two important aspects.

Research on SMR Optimization Algorithm Based on Ad Hoc Network

LI Yue;CHEN Xiang

2012, 203(7): 21-24,2. doi:10.3969/j.issn.1006-2475.2012.07.006

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SMR is a DSRbased multipath routing algorithm. This algorithm itself has obvious limitations. First, when there is a number of unrelated multi-path routings, it may be choose two related multi-path routing as the last main route and backup route. The second, when the destination node receives a RREQ packet, it is only generated a main routing, but there are many routes actually. To the limitations of SMR algorithm, this paper proposes ISMR algorithm that improves SMR algorithm, ISMR algorithm improvements to ensure the formation of two routes, and to ensure that in the case of a number of unrelated multi-path routings, it would generate two unrelated multi-path routings.

Optimization of Plane’s Primary Periodic Maintenance Workflow Based on Genetic Annealing Algorithm

LÜ Xiao-feng;XIE Yong;XI Jian-feng;ZHANG Yong-liang

2012, 203(7): 25-29. doi:10.3969/j.issn.1006-2475.2012.07.007

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Genetic algorithm(GA) is used to optimize plane’s periodic maintenance primary workflow. Firstly, the model of primary work is built. Secondly, the way of “adjusting the sequence” is proposed to ensure the solution of the individuals up to the limits of the work sequence. Finally, elitist operator, simulated annealing(SA) operator and adaptive mechanism are used to improve Simple Genetic Algorithm(SGA). The simulation results demonstrate that, the improved GA is much stronger in bestsolution search ability than SGA, and it overcomes its deficiency of being easy to “precocity”; after optimization the finish time of primary work is shorter 19.78% than before, and proves that GA is good for the optimization of primary periodic maintenance workflow.

Research on Fault Nature Auto-recognition Algorithm for Traveling Wave Fault Location

YAN Su-fen;ZHOU Shu-min;WANG Zhi-cheng;ZHUANG Wen-wei

2012, 203(7): 30-33. doi:10.3969/j.issn.1006-2475.2012.07.008

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The polarity of reflected traveling wave signal changes on the influence of contact resistance during the fault location process. It has opposite phase if the contact resistant is less than traveling wave resistant; it has same phase on the opposite situation. Based on this principle, an auto-recognition algorithm is designed, which can identify the fault type accurately.
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Design of PID Control System Based on Real-coded Genetic Algorithm

MEI Song-tao;WEN Wei

2012, 203(7): 34-37. doi:10.3969/j.issn.1006-2475.2012.07.009

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This paper presents a method using genetic algorithm to tuning the PID control system parameters. Frequency domain is used as the objective function, making the method more practical. According to this idea, C language is used to design the various parts of the genetic algorithm, such as encoding, fitness function and genetic operators and so on. Finally, the actual example is calculated and the results are simulated in the Matlab. The simulation result shows that: the method is rapid and effective.
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Automatic Generation Algorithms Based on Optimization Initial Population

TANG Yong-hong;GONG An;WANG Chao

2012, 203(7): 38-40,4. doi:10.3969/j.issn.1006-2475.2012.07.010

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Aiming at the uncertainty of initial population of the genetic algorithm and the improved genetic algorithm, this paper proposes an optimized initial generation genetic algorithm. Firstly the algorithm finds the local optimized solution, then different types of solutions random combinations, gets the formation of initial generation of genetic algorithm. The next, an optimal solution by genetic crossover and singlepoint mutation is got. Finally, the algorithm is applied to the automatic generation of database systems course. The results show that the method has good efficiency to the examination paper, the requirements of the examination paper can be well positioned to meet.
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Iterative Elimination Algorithm on Z(p^k) for Computing Inverse Elements

LIU Ping

2012, 203(7): 41-43. doi:10.3969/j.issn.1006-2475.2012.07.011

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This paper discusses the algorithm on Z(p^k) for computing inverse elements, while p is a prime. The paper introduces the concept of order of reversible element and the algorithm called the iterative elimination by bit. The complexity of this algorithm is O((logpn)²).

Research on DAP-NAD-CJ Improved Algorithm Based on Multicast

LI Xiang-hai;LIU Yan

2012, 203(7): 44-47. doi:10.3969/j.issn.1006-2475.2012.07.012

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DAP-NAD-CJ (Deterministic Adaptable Priority Net Access Delay with Cycle Jump) algorithm for multicast application is improved. The new algorithm specifies the multicast betueen uneven wireless channel space and network base station, so that the multicast source signal to enter the channel as soon as possible. The simulation shows the modified algorithm in single and multiple priority network is better than the DAP-NAD-CJ algorithm.

Storage Life Evaluation Method of a Type of Missile Based on Grey Prediction Model

XU Ting-xue;ZHAO Liang;MENG Lei

2012, 203(7): 48-50. doi:10.3969/j.issn.1006-2475.2012.07.013

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It is very important to scientifically determine the storage life of a missile for developing support ability and combat power of army. Then, the method of gray GM (1, 1) forecast modeling and residual accuracy of test are elaborated in detail. Finally, uses this model to solve the problem of a missile storage life evaluation, through the analytic results, the method is regarded of feasibility and high practice value.

Dynamic Task Allocation Algorithm Based on Auction

TAO Xue-li;LI Shuang-qun

2012, 203(7): 51-54. doi:10.3969/j.issn.1006-2475.2012.07.014

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Dynamic task allocation is a key issue of open multiagent system(MAS). Based on the algorithm given by the reference ［9］, this paper presents an improved algorithm for a new task appearing at any time in the process of task allocation or executing. The paper takes into account the Agent’s expectation of the known tasks and future tasks, in order to guide the agent reasonable bid to get the optimum alloction. With multiagent transporting army supplies for background, the results show that the algorithm is reasonable and effective.

Application of Longest Common Subsequence Algorithm on Scoring of Filling in Blanks

ZHOU Hua-jun;DING Ai-fen;MA Rui-ying

2012, 203(7): 55-57. doi:10.3969/j.issn.1006-2475.2012.07.015

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This article discusses the longest common subsequence algorithm used on scoring of filling in blanks, and designs a common recognition logic of filling in the blanks based on net examination system. Its operation is feasible in independent academy net examination system.
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Pumping Well Dynamometer Discriminant Algorithm Based on FPR

ZHANG Jian-he;YANG Jing;XU Xin-rong

2012, 203(7): 58-60.6. doi:10.3969/j.issn.1006-2475.2012.07.016

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For rod pumping wells diagnosis of the indicator diagram analysis to study the eigenvalue diagram shown in the specific fault conditions. The indicator diagram data converts the airspace to the form of a frequency domain through the Fourier transform, retaining only the lower frequencies on the coefficients a0, a1, b1, which is as a characteristic value. Eigenvalue pattern recognition algorithm achieves that a rod pumping wells show fast and accurate identification and classification of the diagram. The practical application shows that using the selection of the benchmark midicator diagram 28 types of eigenvalue diagram, calculates the feature vectors for each indicator diagram, and saves it to the feature library. To make mode recognition the given diagrams of eigenvalues, it can be derived the diagram belongs to which mode.
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Study on Calculation Method of Aircraft Field Level Mean Repair Time

ZHU Hua-yuan;ZHAO Gong-wei;WANG Wen-xiu;WANG Li-ming

2012, 203(7): 61-63,8. doi:10.3969/j.issn.1006-2475.2012.07.017

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The paper studies on aircraft field level mean repair time calculation model. Taking the outfield real statistics analysis of a certain type of aircraft for example, calculates the mean time to repair plane, provides reference for calculation and analysis of maintainability quantitative index.

Design of Asynchronous LED Display Control System Based on Cortex-M3

LIU Bin;LIU Wei-yan

2012, 203(7): 64-67. doi:10.3969/j.issn.1006-2475.2012.07.018

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This paper designs a new asynchronous LED display control system based on ARM and CPLD, the core of the system is Cortex-M3, CPLD is the scan control unit, the communication with the PC is accomplished by the Ethernet. It can storage and play automatically, the contents of the host computer can be stored in Flash, the contents can be displayed on the LED screen. The system provides crystal clear and stable picture, and can be maintained conveniently.

Precision Position Control for IPMC Artificial Muscle Based on Operator

ZHAO Chun-li;WANG Ai-hui;

2012, 203(7): 68-71. doi:10.3969/j.issn.1006-2475.2012.07.019

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The ionic polymer metal composite (IPMC), also called artificial muscle, is a novel smart polymer material, many potential application for lowmass highdisplacement actuators in biomedical and robotic systems have been shown. An operatorbased nonlinear robust tracking control or a nonlinear IPMC with uncertainties is proposed. That is, first, a nonlinear robust stable control system is designed based on robust right coprime factorization approach. Second, a position tracking system is presented based on the obtained robust stable system to improve tracking performance. Finally, the simulation and experimental results are shown to confirm the effectiveness of the proposed method.

Novel e-modification Robust Adaptive Control for Aeroengine

ZHANG Long;LI Hua-cong;HAN Xiao-bao

2012, 203(7): 72-74,8. doi:10.3969/j.issn.1006-2475.2012.07.020

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Aiming at the nondeterminacy of the aeroengine model structure and parameters, this paper presents new robust adaptive laws for e-modification scheme using novel Non-Quadratic Lyapunov function(NQLF) for aeroengine. These new laws need no accurate mathematic model of aeroengine and offer better performance represented in a fast response of the output error signal while going to zero with a less number of oscillations. Simulation results show that this controller can make system track the model reference output quite well. It has high adaptivity to the change of aeroengine model parameters and structure.

A 3D Measuring Method Based on Dual-beam Structured-lasers

ZHENG Jian-yong;YAO Jian-min

2012, 203(7): 75-78. doi:10.3969/j.issn.1006-2475.2012.07.021

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The 3D scanning system often encounters defects of reconstruction models during the scanning process, which is caused by the loss of scanning data due to the blocking of CCD’s viewing area by the object being measured. Aiming at this problem, this paper proposes an improved method, in which a laser is added at the CCD-centered symmetrical position to make the system enable to obtain two point clouds at two different angles. Then the two point clouds are stitched together to eliminate the defects of one single point cloud. Finally, distances of the upper, middle and lower parts of the object are measured respectively, as well as the distances of their 3D models. Meanwhile the mean squared error is calculated.

Simulation and Analysis of Routing Protocol for AODV Based on NS2

LI Qiong;ZHANG Liang

2012, 203(7): 79-82. doi:10.3969/j.issn.1006-2475.2012.07.022

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This paper briefly introduces the AODV routing protocol of Ad hoc network and uses NS2 to simulate the routing protocol of AODV. Through the different simulation scenarios calculates the average of all cases of AODV delay, normalized routing load and packet delivery ratio, and analyses of the impact of these four parameters on the AODV routing protocol based on the results. Finally it draws a conclusion that AODV is suitable for small or medium-sized and low packet rate occasions.

Three-dimensional Reconstruction Method Based on Decorrelation of Speckle Patterns

DONG Xiao-long;GUO Tai-liang

2012, 203(7): 83-87. doi:10.3969/j.issn.1006-2475.2012.07.023

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In order to solve the problem of the limited measuring range and complicated camera calibration, this paper proposes a novel approach for 3D reconstruction based on the decorrelation of the speckle patterns. First, when coherent light is transmitted from a rough surface, the speckle pattern is produced by the mutual interference of a set of wavefronts; then, estimates the range of the object by using the decorrelation properties of the reference images at different positions; at last, the region of displacements as a reference can be obtained by triangulation to determine the profile of a certain 3D object. Simulation results show that the depth map can be realized within the allowed range. A significant advantage of the method is the absence of shadowed area and high configurability.

Analysis of Pleasant and Unpleasant Emotion Based on EEG Signal

WANG Ya-qing;CAO Yan-jun;FAN Hao-yu;GUO Ming-lei;SONG Qiu-xia

2012, 203(7): 88-91,9. doi:10.3969/j.issn.1006-2475.2012.07.024

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EEG is currently one of the most important methods to study brain signal. The mood changes also will cause brain electrical signal differences, this paper uses wavelet analysis and EEGLAB toolbox (mostly Independent Component Analysis) to analyse pleasant and unpleasant these two kinds of mood state of EEG signal, then finds qualitatively the differences in these two kinds of signals, thereby realizing visualization of human emotions. The analysis has greater value for teachers, students and seamen whose emotions are more likely to be influenced because of heavy stress.

Research on Application of Web-based Medical Image Visualization System

LI Wei-bo;BAO Su-su;LI Jian-zhuang

2012, 203(7): 92-95. doi:10.3969/j.issn.1006-2475.2012.07.025

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This paper introduces a kind of self-developed medical image visualization system based on Web, and the related technical details are detailed analyzed. This system receives the basic data uploaded by the users. After the data processed by the professionals is uploaded to the server, this system provides the online function of checking images, 3D visualization, expert diagnosis and operative manipulation for the users.
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Application of Texture and Geometrical Characteristics in Road Extraction

MA Huan;CHU Heng;WANG Ru-yan 

2012, 203(7): 96-99. doi:10.3969/j.issn.1006-2475.2012.07.026

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This paper proposes a new method that integrating texture and geometrical characteristics for the road extraction of high resolution remote sensing imagery. Firstly, texture characteristics of the high resolution remote sensing imagery is analyzed, and a clustering method based on texture characteristics is proposed. The clustering method approximately divides the imagery into road areas and nonroad areas. Then the geometrical characteristics are utilized to reject the false road pixels which have been mingled in road areas, the preliminary road structure has been formed. Finally with the function of mathematical morphology, the holes that come from vehicles and trees are wiped off. The integrated road information is obtained. Compared with the other traditional methods, the result of the experiment shows that the proposed method can extract the road information in the high resolution remote sensing imagery effectively.
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Iris Recognition System Based on Log-Gabor Filter

CHEN Yu-wen;XIANG Lin-hong;ZHANG Yu-lin

2012, 203(7): 100-103. doi:10.3969/j.issn.1006-2475.2012.07.027

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On the basis of the existing iris recognition research, the paper proposes an iris recognition system based on Log-Gabor filter. The system uses Matlab plateform, and combines onedimensional LogGabor filter normalized iris texture and uses phase encoding feature extraction, then uses Hamming distance match iris with the interference mask shielding iris preprocessing noise. The CASI iris image database is used in the experiment, results show that the system false positive rate is 0.125%, rejection rate of 0.05%. Better recognition results are achieved.

A Method for Face Recognition Under Variable Illumination Conditions

LI Nan

2012, 203(7): 104-106,. doi:10.3969/j.issn.1006-2475.2012.07.028

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A novel method for face recognition based on region is proposed to solve the problem of illumination variable. First the image is divided into four regions and the grayscale changes in the regional context is regarded as a measure of illumination affect the face display. The impact regions executes frequency normalization. Features is extracted by regional units and region recognition by support vector machine, then final result is achieved by recognition result fusion. The experiments show that the method can get good face recognition rate under illumination changes.

Estimation of Data Query Operation Cost

FENG Kai-ping

2012, 203(7): 107-110. doi:10.3969/j.issn.1006-2475.2012.07.029

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In the operation of database, the proportion of the query operation is the largest, and query operation is the largest statement in cost. It is different that the cost is occurred by each type of operation during the data query operation. This paper combines with the applications of actual topic, proposes the estimation method of the operation cost of projection, option, joint, group and gathered and so on in the process of the query.

An Extending Middleware Frameworks Based on Wireless Sensor Networks

YIN Duo-fen;GONG Hua-ming

2012, 203(7): 116-119. doi:10.3969/j.issn.1006-2475.2012.07.031

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Sensor middleware provides a programming abstract which facilitates the programmer task and bridges the gap between applications and the lowlevel hardware. Current middlewares are mostly based distributed. Middleware for distributed systems is a relatively mature research area with a considerable amount of work done on the aforementioned topics. This paper discusses why standard distributed systems middleware solutions are not suitable to address Wireless Sensor Network(WSN) problems. Then the paper discusses and summarizes some of the notable middleware approaches each representing a different technique. Finally it illustrates by a health monitoring use case, proposes an enhanced middleware framework that better addresses the needs of WSN applications.

Research on E-mail Classification Based on Dynamic Characteristics Library

MU Jun-peng;DONG Kui-feng;ZHANG Ming

2012, 203(7): 120-123. doi:10.3969/j.issn.1006-2475.2012.07.032

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With the development of E-mail classification technology, it needs to extract from the constantly E-mail features, so as to improve the organization and management of the message category more effective, according to changing characteristics. This article resolves the problem from the aspects of the message’s dynamic characteristics, by using the mail client software, using the ICTCLAS tool to realize Chinese word segmentation, and using the improved TF-IDF algorithm to calculate the mail feature weighting, and also using the WEKA mining tool to examine the result with the simulation experiment. The experimental results show that, by using the dynamic characteristics in a mail message, the realization of changing characteristics in mail classification is feasible, and to a certain extent, this method is more reasonable and effective.

Research on E-mail Classification Based on Dynamic Characteristics Library

MU Jun-peng;DONG Kui-feng;ZHANG Ming

2012, 203(7): 120-123. doi:10.3969/j.issn.1006-2475.2012.07.032

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With the development of Email classification technology, it needs to extract from the constantly Email features, so as to improve the organization and management of the message category more effective, according to changing characteristics. This article resolves the problem from the aspects of the message’s dynamic characteristics, by using the mail client software, using the ICTCLAS tool to realize Chinese word segmentation, and using the improved TFIDF algorithm to calculate the mail feature weighting, and also using the WEKA mining tool to examine the result with the simulation experiment. The experimental results show that, by using the dynamic characteristics in a mail message, the realization of changing characteristics in mail classification is feasible, and to a certain extent, this method is more reasonable and effective.

Design and Implementation of Exquisite Course Website

ZHU Li-juan

2012, 203(7): 124-126,. doi:10.3969/j.issn.1006-2475.2012.07.033

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According to the requirements of the exquisite course website, using Visual Studio 2010 IDE and three-tier framework technique, and combining C# and SQL Server 2008 database, a course website with three-tier framework based on Browse/Server is designed and realized, the club’s module of this website is introduced and shown how to realize in threetier. This website is established, and it can provide academic guide and method gist for practical website development.

Research and Architecture of Network Multimedia Classroom Based on TCP/IP Protocol

WANG Qin;YAN Hua;LIU Hui-qing

2012, 203(7): 132-134,. doi:10.3969/j.issn.1006-2475.2012.07.035

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Aiming at the problems of many colleges and universities chasing the amount during the multimedia classroom building, constantly to expend or based on the original multimedia classroom, which is outdated mangement model and lacking of network, Such traditional multimedia classroom management model can not effectively solve remote monitoring, control and management of multimedia classrooms, making the failure of the multimedia teaching can not get a quick response, thus affecting the smooth implementation of the teaching. With the development and construction of the university campus network, this paper uses the TCP/IP technology to study the architecture based on the TCP/IP networkbased multimedia classroom technology. it can effectivelly solve the campus network access in remote monitoring, control and management of multimedia classroom equipment, and redize of efficient management of multimedia classroom.

A New Mehtod of IPv6 Unicast Address Allocation

SHANG Jian-zhen;LI Dan;

2012, 203(7): 135-137. doi:10.3969/j.issn.1006-2475.2012.07.036

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First, this paper carries on the simple introduction to the IPv6 address architecture, then details a new method of IPv6 address allocation—borrowed bits from interface ID to expand SLA（SiteLevel Aggregator(s)）.

Design of Job Description Language Based on Task Communication Under Grid

GAO Zhi-jun

2012, 203(7): 138-141. doi:10.3969/j.issn.1006-2475.2012.07.037

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Job management has been a hot issue in grid technology. The job description is the first task in the job management. This paper analyzes the job description, designs the job description language(CJDL) based on task communication. CJDL based on the XML language, with scalability, its advantages is that it can describe the communication between tasks and demands on resources. It can accomplish the automatic parallelization of job and resource matching further, and lay a foundation for job spawn and running and so on.

Design of Differential Frequency Hopping System FrequencySynthesizer Based on DSP and DDS

ZHU Li-ya;LI Cheng;ZHANG Xi

2012, 203(7): 142-145. doi:10.3969/j.issn.1006-2475.2012.07.038

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With the character of antijamming and high speed, the differential frequency hopping is the development direction of shortwave frequency hopping communication. This paper introduces a frequency synthesizer design for DFH. The DDS chip AD9854 is adopted as the core component, the DSP chip TMS320VC5402 is adopted to control DDS chip to produce the wave of transmit frequency. The actual test results show that wave have an advantage of high conversion speed and good waveform.

Research on Recovery of Minimum Cost Forwarding Algorithm in WSNs

LI Qing-hua

2012, 203(7): 146-148. doi:10.3969/j.issn.1006-2475.2012.07.039

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Wireless sensor networks have obtained a number of applications, and different requirements of the applications have promoted the researches of routing algorithms. This paper from the sensor nodes can become invalid very easily, studies the recovery of minimum cost forwarding algorithm, proposes a method that can recovery broken path rapidly. Simulations show that the proposed method can recover the broken routing and consumes fewer resources.

Design and Implementation of Computers Remotecontrol System in LAN

JIN Biao;ZHANG Zheng-qiu

2012, 203(7): 149-151. doi:10.3969/j.issn.1006-2475.2012.07.040

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A remote-control system is designed based on Pstools toolkit, Socket and wakeonLAN technology to carry out some operations on computers in LAN remotely, such as start, shutdown, restart, screen lock, file transfer and screen broadcasting. The efficiency of network management for managers can be improved with the help of this system. Its stability has been proved by experiments, so it can be used in university laboratories, companies and other places.
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Rate Adaptation in WSN Based on Markov Decision Process

LI Xiang-peng

2012, 203(7): 152-154. doi:10.3969/j.issn.1006-2475.2012.07.041

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Wireless sensor networks have been widely applied in many different fields. One of the most crucial issues in WSN is the energy consumption. Since the development of WSN is significant, nowadays the nodes of the networks are often with the multirate scheme. This attribute provides the opportunity to improve the energy efficiency of the WSN. This paper proposes a method to control the switching between different rates to save more energy for network, which is determined by the Markov decision process. Simulation results show, the energy efficiency is improved while the quality of communication is still sound.

Research on Evaluation Model for Satisfaction of Reader Based on BP Neural Networks

SUN Da-chen;SUN Ying-yan;SUN Chang-li

2012, 203(7): 155-156,. doi:10.3969/j.issn.1006-2475.2012.07.042

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On the basis of analysis the importance of satisfaction of reader and interrelated elements， this paper proposes a valuation model for satisfaction of reader based on BP neural networks. BPNN calculates the relation between the reader and interrelated elements，the experiment result shows the model is effective.

Design and Implementation of Distributed Wireless Network Intrusion Detection Systems

LUO Xue-ping;LIU Hao

2012, 203(7): 157-159. doi:10.3969/j.issn.1006-2475.2012.07.043

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Aiming at the features of wireless local area network, this paper designs a distributed wireless network intrusion detection systems, which using the superior of distributed detection, centre manager and date protection range far. The model design, standard API, Which maks the system reusability，easy to use and scalability guaranteed.

Design and Implementation of Embedded Web Server Security Based on SSL

SHEN Yong;ZHU Chao

2012, 203(7): 160-162,. doi:10.3969/j.issn.1006-2475.2012.07.044

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Embedded Web servers face the same problem of network security as traditional Web servers. The architecture and characteristics of embedded Web technologies are introduced, and its security requirements are analyzed. On this basis, a security enhancing scheme based on SSL protocol for embedded Web server is given. Analyzing and selecting the SSL protocol and Web server software package, a security embedded Web server system is constructed. Its security is analyzed and tested. Experiments show that, the security scheme can ensure the confidentiality, integrality and nonrepudiation of information services of embedded Web server, and achieve the effect of enhancing security.
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A Network Security and Defense Program Based on Ad Hoc

HUANG Cheng-bing;CHEN Ming-dong

2012, 203(7): 163-165,. doi:10.3969/j.issn.1006-2475.2012.07.045

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Analying of Wireless Ad Hoc networks play an important role in society, and its facing a variety of security threats, this paper discusses the advantages and limitations of various network security solutions and technologies for wireless Ad Hoc networks, proposes an indepth security defense program and explains its implementation process, while points out some of the problems of wireless Ad Hoc networks need to be resolved in the security field.
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Encryption of Personal Health Record

HUANG Wu-jian

2012, 203(7): 166-170. doi:10.3969/j.issn.1006-2475.2012.07.046

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Personal health record (PHR) is focused as a new research object in medical and health field, and the transmit security of PHR oriented to Web application is one of problem needed to be solved. First, this paper presents a PHR based on XML format. Then, for the reasons that PHR is based on crossplatforms, carries massive information and requires high transmit security, the paper uses XML encryption technology to encrypt the PHR in order to transmit it safely. It turns out that this encryption can not only guarantee the encryption efficiency, but also provide a good transmit security.
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Research on System of Power Transformer Fault Diagnosis Based on WSN and Data Fusion Technology

SHAO Kai-li;WANG Hong-yun

2012, 203(7): 171-175. doi:10.3969/j.issn.1006-2475.2012.07.047

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The article discusses a method of power transformer fault diagnosis based on data fusion and extension theory, for this method a power transformer fault diagnosis system is constructed and developed by the application of wireless sensor network technology and VS.NET platform. The system applies WSN technology in wireless data acquisition of gases dissolved in power transformer oil, and can achieve real time data transmission. At the same time information fusion technology which is used to optimize the data, not only can reduce network energy consumption and ensure the accurate and objective data. For the coding rules of gas ratio method currently existed is incomplete and single, the extension method, combining quantitative and qualitative, it can make transformer fault diagnosis more refinement. Especially, the visual system can achieve the acquisition, displaying, analysis, storage and playback of gas parameters, and can be used in realtime analyzing and automatic diagnosis of transformer fault. The system of power transformer fault diagnosis can not only resolve the problem of the realtime and remote monitoring of operating personnel, but also greatly improve the performance of the transformer fault diagnosis. It provides a new direction for transformer online monitoring and fault diagnosis technology.
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Application and Research on Speech Recognition Technology Based on 16-bit MCU

ZHANG Jing-jing;LI Yong-wei;DA Xin-min

2012, 203(7): 176-178. doi:10.3969/j.issn.1006-2475.2012.07.048

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Based on patternmatching principle of speech recognition for the study, the application process of the speech recognition technology in the 16-bit MCU SPCE061A is analyzed. The designs of the phone contacts for voice dialing, voice recognition robots, voice car which based on the 16bit microcontrollers are also studied as the practical application of the speech recognition. It is used to provide a theoretical frame of reference for further research on microcontrollerbased speech recognition technology.
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Research on No Mediator FED Driving System

WU Deng-shan;LIN Zhi-xian

2012, 203(7): 179-181,. doi:10.3969/j.issn.1006-2475.2012.07.049

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Planar-gate FED， whose cathode and gate are parallelly distributed in the same plane. There is vacuum between the cathode and the gate which is also called no mediator FED.Being different from normal-gate and undergate FED, which applies high voltage to the anode, scanning signal to the gate, and data to the cathode. This paper proposes a no mediator FED driving system. It applies scan signal to the anode, data to the gate, and negative voltage to the cathode. Data acquisition and caching，the grayshade column driving and the row scanning circuit are also adopted in the system. A no mediator FED prototype that can display word and image has been worked out.

Research on Application of Ground Interactive Projection 〖JZ〗Technology for Safety Warning Education

CHEN Jing-liang;ZHANG Jin-shi;CHEN Chen

2012, 203(7): 182-184. doi:10.3969/j.issn.1006-2475.2012.07.050

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Safety warning education exhibition appears ceaselessly, how to impress the visitors a deep impression, improving safety warning education participatory, interactive, became the focus of attention. Taking the application of the hardware scheme and software program as an example, by the large screen interactive technology directly using the ground as a display, largescreen interactive display on the ground floor interactive projection technique can give the visitors find everything fresh and new feeling and achieve better effect.

Implementation Method of Sound Library Maintenance Online Based on CAN Bus

WANG Bin;LI Wen-xin;LI De-tian;LIU Li

2012, 203(7): 185-187,. doi:10.3969/j.issn.1006-2475.2012.07.051

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In aerocraft instruments, it need to notice the operation staff something about event, early warning and warning by sound broadcast; sound library always prestore in the storage medium of aerocraft instruments. But the demand is dynamic, the sound library also to be changed. If the sound library of aerocraft instruments can be maintained on the system operation state, it will be very convenient for user. With the practical examples in engineering, the paper proposes a method which support sound library maintenance online based on the CAN Bus.This method has been tested, and it is very valuable for practical application.

Application of Optimum Weighted Combination Method

WANG Dian;CAI Qiong

2012, 203(7): 188-191. doi:10.3969/j.issn.10062475.2012.07.052

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Aiming to estimate for missing data of the electric energy metering and management system, the theory of optimum weighted combination which combined GM(1,1),SVM(Support Vector Machines) and ANN are introduced to shortterm load forecasting of the system, then the predicted value is get. The forecasting results based on the data from the distribution electricity center in Eastern Slovakia shows that the algorithm possesses evident effectiveness in the field of short-term load forecasting.

Development and Implementation of Teaching Administration System Based〖JZ〗 on Three-layer Structure

LE Yi

2012, 203(7): 192-194,. doi:10.3969/j.issn.1006-2475.2012.07.053

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According to the real situation of the educational administration work, this paper builds a three-layer structure of teaching administration system combining related technologies provided by .NET platform. First, it plans the framework and functional modules of the system. Then, it analyses each kind of component’s application. Finally, based on the course management module, it elaborates the technical details and key coding that the system implements. The software reuse technology and the design for the delamination structure make the system have the extensibility, universality and maintainability.
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Application of a Novel Method to Removing Random Noises in Seismic Data Processing Based on Wavelet Analysis

LI Hui;YU Tao;DU Guang-wei;XIAO Guo-fu

2012, 203(7): 195-197,. doi:10.3969/j.issn.1006-2475.2012.07.054

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The random noise is a kind of noise with wide frequency band in seismic data and influences the useful signal very much. It is very important to remove the random noise from the seismic data. Fast Fourier Transform (FFT) is the traditional method to remove the random noise and can analysis a signal on the whole spectrum, however, cannot analysis nonstationary signal. Wavelet analysis is a novel method to improve the practical data and remove the noise and is prior to other methods. This paper uses the wavelet analysis to remove the random noise from the seismic data, the results show that wavelet analysis can more efficiently remove the noise and improve the precision of seismic data.

Research on Text-oriented Event Information Extraction Method

LIU Jing-pei;LI Jiang;JI Wen-ping;PAN Peng-hui

2012, 203(7): 198-201. doi:10.3969/j.issn.1006-2475.2012.07.055

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This paper studies the extraction of text-oriented event information, establishes an event information extraction system. This system filters original corpus contain keywords firstly, obtains initial patterns using the method combined with hierarchical clustering (HCL) and the algorithm of longest common subsequence secondly, and then obtains final patterns contain keywords. Using these patterns information can be extracted and elements of event can be obtained finally.

Analysis of Datasets Model in IEC61850

WANG Jin;TAO Qian;CHEN Hong

2012, 203(7): 202-205. doi:10.3969/j.issn.1006-2475.2012.07.056

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The one of most important outcome of the standardization process is the IEC61850 standard. IEC 61850 is an abstract application layer protocol aimed at providing interoperability between a variety of substation and feeder devices,by describing how devices to communicate in a substation as well as the related system requirements. This paper describes anyone interested in getting an overview of the IEC61850 international standard, and understanding how the objectoriented models proposed in the standard standardize the data found in IEDs and the communication of this date between substation devices.

Design and Implementation of Portable ECG Monitor Based on Embedded Linux and MiniGUI

GONG Hui-hong

2012, 203(7): 206-208. doi:10.3969/j.issn.1006-2475.2012.07.057

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Introducing embedded technology, Portable ECG monitor based on embedded Linux and MiniGUI is researched and designed and this equipment devised with S3C2440 microprocessor. The experimental results show that the designed ECG monitoring system has good perform in ECG signal sampling, wave displaying and processing. It lay a foundation for the further study and develop of the product.
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Design and Implementation of LDAP Authentication Technology

WANG Guang-zhi;XIAO Mao;DONG Li

2012, 203(7): 209-211. doi:10.3969/j.issn.1006-2475.2012.07.058

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It set up a double authentication way based on LDAP to respond to the demand that multiple application systems use the single user to log in. With the users register being the background, first this paper concisely describes the basic theory and system architecture of LDAP, and then designs and achieves a double authentication way combined with LDAP and local verify ways. This paper describes the specialty of the authentication methods and successfully applied it in the Qinghai oilfield publish the data of exploitation well by automatical collection system.

Design of Ultrasonic Ranging System Based on SPCE061A Singlechip Microcomputer

GUAN Xiao-bo

2012, 203(7): 212-214. doi:10.3969/j.issn.1006-2475.2012.07.059

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A set of ultrasonic ranging system is designed by using of ultrasonic characteristics, the system uses sunplus SPCE061A single-chip microcomputer as the main control chip. This paper designs the single-chip microcomputer control ultrasonic transmit and receive, timer timing, etc. The system is of simple operation, low cost, high precision measurement and a broad prospect of application.
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A FPGA Configuration Method for Improving System Initial Efficiency

XIE Ting-ting

2012, 203(7): 215-217. doi:10.3969/j.issn.1006-2475.2012.07.060

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This paper presents a FPGA configuration method composed by master controller CPU, CPLD and RAM Flash. RAM Flash is used to store FPGA configuration data, and CPLD reads the configuration data from RAM flash. FPP (Fast Passive Parallel) method is adopted to configure FPGA. The main controller communicates with CPLD through its interfaces to update and maintain configuration data of RAM Flash. This paper also introduces several applications for this method.

Design of Ocean Data Management and Sharing Platform

HAN Chun-hua;LIANG Jian-feng;ZHANG Jun-ming;YIN Ru-guang

2012, 203(7): 218-221. doi:10.3969/j.issn.1006-2475.2012.07.061

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With the wide development of ocean exploration, data type, amount and demand are increasing. It is very important to manage these data scientifically and effectively. According to the current status of ocean data management, a view of constructing the data management and sharing platform on the basis of experience is brought out and the logical, physical, functional and technical frameworks are designed. On the other hand, the service contents and fashion also are proposed.

Research on Project Teaching Based on Programming

GAO Chong;XU Qun

2012, 203(7): 233-235. doi:10.3969/j.issn.1006-2475.2012.07.065

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Aiming at C language programming for the training process, based on “taskdriven”principle, the choice of the comprehensive project teaching of gobang game designed for incremental steps of the project, this paper aproposes a based on “clean space” for junior chess programming algorithm framework. In the course of the project of teaching, students gains knowledge gradually from the simple logical structure refinement to fully indepth. Teaching results show that the implementation of the project makes each student’s programming skills to be improved to varying degrees.
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Design of Data Acquisition System Based on VB and Advantech Data Acquisition Card

LI Zhan-ming;ZHAO Jing

2012, 203(7): 236-238. doi:10.3969/j.issn.1006-2475.2012.07.066

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According to the requirements of DC600V QinghaiTibet generation car power test system, this paper constructs the hardware platform of date acquisition system using Advantech data acquisition card, and introduces the hardware structure and software structure of the system. On the basis of this, the system uses interrupt triggering to acquire data, realizes real time data acquisition and displaying data with dynamic curves etc., and utilizes VB 6.0 technology interview of SQL Server 2000 databases for creating equipment states information, under VB 6.0 environment. The experiments show that the system is of good stability, high accuracy.

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