Proceedings of the 2012 International Conference on Computer Application and System Modeling

+ Advanced search
400 articles

Modeling and Simulation of Fresh Air System with LHTS and Solar Energy

Lili Wang, Tao Zhang
State of the research about the technology of solar energy with LHTS Latent Heat Thermal Storage at home and abroad was firstly introduced, and a fresh air system with solar energy and LHTS was then introduced. After that the fuzzy control system of fresh air temperature was studied. Firstly, a mathematical...

Numerical Simulation for the Effect of Joint Inclination to the Stability of Stratified Rock Slope

Qihong Wu, Zhiyong Kou, Shiming Wan
Slope excavations are often constructed in stratified host rock masses in practice. In order to describe the effect of the inclination of layer of rock mass to the factor of safety of slope. a rock slope in one road is chosen as the engineering project. In the present paper, the stability mechanism of...

Numerical Simulation and Analysis Of PCM on Phase Change Process Consider Natural Convection Influence

Lin Qiu, Min Yan, Zhi Tan
A phenomenon of heat energy storage and release in phase change materials (PCM) which used in building retaining structure has been investigated. In the reality process of phase change, liquid phase has two ways of heat exchange: pure heat conduction and natural convection. To analyze the reality melting...

RASN: Resist on-off Attack for Wireless Sensor Networks

Pengzhi Shi, Haiguang Chen
Reputation Based Framework for Wireless Sensor Networks(RFSN) represent soft security mechanisms that complement traditional information security mechanisms. RFSN can prevent malicious of data from internal adversaries or faulty nodes. In this paper we add a new architecture called Trust-Holding-Agent...

Design of Helicopter Training Simulator

Wei Chen, Jingchao Lu, Rui Nie
Based on the aerodynamic parameters and control law of certain helicopter, a helicopter training simulator is designed. The recursive execution procedures of the actuators are written by C language, the helicopter equation of state is solved by Runge-Kutta, the navigation calculation module is designed...

A Real-time Underwater Speech Communication System

Jingsai Jiang, Xiaofeng Ma, Ye Li, Yanhong Fan, Qiuyun Hao
With frequency hopping (FH) communication system and ultra-low-rate speech coding technology, the paper designed a real-time underwater speech communication system, for which the hardware solution is also given. In the system, the part of source coding is a 300bps vocoder based on enhanced mixed excitation...

A Novel Algorithm for the Weak GPS Signals Acquisition

Huan Li, Yubai Li, Wei Peng, Bolong Wen
The acquisition of weak GPS signals is a challenging problem. The current methods for acquisition of weak GPS signals mainly depend on aiding, in which the GPS receiver needs priori information from base-station to promote weak GPS signal acquisition and tracking. It is unavailable in some remote locations...

A Surface Fairing Method Based on Torus Tool Machining

Bochang Zhang, Rufeng Xu, Tao Ning, Zhitong Chen
In order to solve the problems of failure of tool-path generation or a relatively narrow processing row span ,which are initiated by unfairness of surface of engine blade , this paper according to the blade actual design, machining and testing method, combining End-points error controlling method for...

Research Progress of Computer Automatic Classification Technology and Methods Based on Remote Sensing Images

Hebing Zhang, Shidong Wang
In this paper, the research progress of computer automatic classification technology and methods based on remote sensing images is introduced. Firstly, the traditional classification methods of remote sensing image are discussed, which include supervised classification and unsupervised classification....

A New Attack Model of Anonymous Communications System Based on Rerouting

Zhili Chen, Tiezu He
A new attack model is presented in the foundation of the model of anonymous communications system based on rerouting. Based on this model, it proposes one kind of attack algorithm. The premise of this algorithm realization is that only one sender and one receiver are in the anonymous system, and the...

Application of DELMIA on Maintainability Design of Aircraft

Yongsheng Shi, Yu Liu
The quality of the maintainability is the key to success of modern large aircraft, In this paper, the flow of interactive maintenance design (Design For Maintenance, DFM) is introduced based on the DELMIA software, Also the requirements of maintainability design. We established the models of Boeing 737-300...

Evolved Discrete Harmony Search Algorithm for Multi-objective No-wait Flow Shop Scheduling Problem

Guang Xie, Junqing Li
In this paper, an evolved discrete harmony search (EDHS) is proposed. Firstly, a job-permutation-based encoding scheme is applied to enable the continuous harmony search algorithm to be used in all sequencing problems. Additional, a new method is proposed to generate new solutions, while an efficient...

The CAD of Group Animation based on Firefly Algorithm and Ant Colony Algorithm Fusion Algorithm

Shijie Xu, Shuming Jiang, Jianfeng Zhang, Zhiqiang Wei, Jian Li
Firefly Algorithm (FA) is a new meta-heuristic evolutionary algorithm and it has fast calculation and excellent global search capability. Ant Colony Algorithm (ACA) has a positive feedback mechanism and distributed optimization method. Its solution has high accuracy. For characteristics of FA and ACA,...

The Implementation and Application of Construction Safety Supervision and Management System based on Web server

Min Cao, Jihai Huang
This paper focuses on the basic principles and main components of web server-based construction safety supervision and management. Comparative and analysis of the characteristics and advantages of the system, its application for safety of the construction enterprises in production controlled and the...

Measuring Halon Level Based on the Model of Residual Ultrasonic Waves in Container's Wall

Yiyang Tian, Jinshui Qiu, Boyun Liu
The halon is usually stored in the sealed highpressure steel containers at liquid state, which can not be detected the liquid level by using the traditional contact-type method. In this paper ultrasonic is used to measure the liquid level which achieved the purpose of nondestructive testing, the model...

An 1.2GHz High-performance MUX-DDFS Using Quartet ROMs

Zhikun Hao, Zhi Fang, Ling Yuan
This paper presents a detailed description of a direct digital frequency synthesizer(DDFS) using optimized quartet ROMs. The quartet ROMs technology allows improving the system’s working frequency with respect to controllable chip size and beneficial effects on system performances. Such a high-speed...

Stability of Mooring System Based on Linear Complementarity System Theory

Xianwei Xiong, Zhuobin Wei, Cheng’an Xiang
In order to determine if a given mooring system is globally asymptotically stable, the mooring system is analyzed based on the hybrid system theory. The stability of linear complementarity system is investigated by using the common Lyapunov function approach. A method to find the common Lyapunov function...

Study on Projective Synchronization in Different Chaotic Systems

Ling Luan, Lijun Feng
A method is proposed to realize projective synchronization in different chaotic systems. The structure of the controllers is designed based on Lyapunov stability theory. Single-mode laser Lorenz system and Rössler system are taken as examples to verify the effectiveness of the proposed method. The method...

Development of Self-recording Real-time Monitoring System of Soil Erosion

Jian Liu, Qifeng Gao
This article develops tipping-bucket self-recording real-time monitoring system of district soil erosion monitoring and solves the problem of long-term automatic monitoring at fixed point. It adopts the water body measurement method with simple and reliable mechanical structure, with low cost and no...

Parametric Design of Straight Bevel Gears Based on Solidworks

Yuxia Shan, Wei Zhang
The Visual Basic program of standard straight bevel gear’s parametric design based on Solidworks software was completed. The geometric features of bevel gears were analyzed, parametric design variables were defined, each control point was determined in Cartesian Coordinate System. In development of the...

A Novel Routing Algorithm in Wireless Ad Hoc Network

Zuchun Ding, Wenying Mo, Jian Chen, Lei Lei, Xinghong Qin
This paper suggests a novel algorithm of wireless ad hoc network. This algorithm has the features of adaptive clustering, multiple layering and treelike topology, with excellent abilities in autonomous network construction. The algorithm also suggests effective measures for handover and communication...

Design and Implementing of Meteorological Data Management System

Xiong Jia, Weimin Zhang, Yi Yu, Yaolei Qin
Based on characteristic of meteorological data, meteorological data management system(MDMS) is designed and implemented. It is divided to client-side and server-side parts. The server-side which is responsible for meteorological data archived retrieved uses two-tier design, including logical server and...

Test Frequency Selection of Analog Circuit Based on Discrete Particle Swarm Algorithm

Zhigang Zheng, Liang Wu
A method of optimal test frequency selection for analog circuit fault diagnosis is proposed. The method simulates the circuit faulty states only in the bands with highest fault sensitivity and that reduces part of simulation cost. Test frequency selection is considered as a multi-objective optimization...

An Improved Quantum Evolution Algorithm and Performance Analysis

Yi Zhang, Xiuxia Yang, Shaolei Zhou
To tackle the shortcoming of deficient using of feedback information in quantum-inspired evolutionary computing and catastrophe such as quantum mutation, the improved quantum-inspired evolutionary algorithm (IQEA ) is proposed. The crossover and mutation operators of genetic algorithm are introduced...

Face Tracking Based on Skin Color and Motion Prediction

Jing Sun
Aimed at the disturbance caused by illumination variations and similar skin color regions in the video scene which will greatly affect face tracking accuracy, and in order to enhance the real time performance, a novel approach for face tracking based on skin-color information and motion prediction is...

Group Audio Application with Flash Multicast Streaming Based on RTMFP

Linghong Xue, Fuan Wen, Chunmei Fan, Jun Wang, Xiao Wang
In order to improve the user experience and reduce the operators’ cost, Real-Time Rich Internet Application (RIA) has become more and more important compared with other Web Applications. Real-time RIA combines the Multimedia and Real-time experience in the client side, which provides the live collaboration...

An Efficient Consistency Algorithm for Solving Tighter Solution Space of Temporal Constraint Optimization Problem

Wen Zhang, Yanguang Zhu, Yifan Zhu
This paper mainly gives an efficient consistency algorithm for solving tigher solution space of Temporal Constraint Optimization Problem (TCOP), and it is a variation of Path Constraint (PC) that is widely used in the domain of Constraint Satisfaction Problem (CPS). The algorithm can find out the feasible...

Research on the Design Theory of Swirl Generator Attached to a New Bidirectional Flowmeter

Huazhi Li, Qianchao Liang, Hanguo Cui, Shun Zhang
Based on the application of hydrodynamics, a new method of designing the swirl generator attached to a new bidirectional flowmeter is put forward. The 3-dimensions simulation in CFD is carried out to study the fluid motion for various amount of vanes attached to the swirl generator and various intake...

Image Segmentation Based on Visual Perception Model

Shuai Shao, Fuqing Duan, Ping Guo
Image segmentation is the basis of image processing and image analysis. However, there are no common method that can be used in natural images, and present methods fail to explain understandings of human’s visual system. In this paper, we propose to apply Karklin's visual perception model to extract...

Design of IRIG-B Code Encoder Based on SOPC

Qiaoyu Xu, Xing Wang
Aiming at the complexity of time unified hardware architecture, this paper presents the design scheme of IRIG-B encoder and system control based on SOPC. The NIOSII processor is configured with NIOSII IDE. Firstly, the design of IRIG-B(DC) coding module is accomplished to realize with Verilog HDL, and...

PID Algorithm and Fuzzy Control Algorithm in Step-less Speed Adjusting System Control with PLC

Yaolin Zhao, Dapeng Xing
close loop step-less speed adjusting system is widely used in industrial control which is based on PLC and frequency converter. For getting better transient state function, and assure the speed adjusting smoothen and steady, PID and fuzzy control algorithm were independently used in the system controlling...

Research of Virtual Test Platform for Marine Instrument

Yi Zheng, Zhongqiu Wang, Juncheng Wang, Hongru Wang
Virtual test Platform for marine instrument could provide visualized and interactive simulation solution for the development process. It could be used for virtual test or virtual experiment of mechanical or electro characters of marine instrument. The marine virtual instrument test environment is established...

Design and Simulation of IIR Filter under Graphical User Interface

Xuemin Zhang, Shixin Liu, Xiuyan Wang
A novel method to simulate the IIR filter based on GUI(Graphic User Interface) is introduced in this paper. This method not only depended on Matlab code, but also made use of controls which generate a GUI. All the operations have been done by GUI. This paper took bilinear transformation method to realize...

The Research of Memory Model Based on Granular Computing

Wenchao Xu, Enjuan Wang, Qing Xue, Changwei Zheng
To simulate human memory, this paper introduces granular computing into modeling of memory, establishes a three order system, divides the memory model into instantaneous memory module, working memory module and the long-term memory module, filters out the memory information, granular coding the information...

General Purpose Framework Designing for Network Security Test Devices Based on Multi-core Processor

Guozhen Shi, Fenghua Li, Li Li, Hanzhang Shi
In view of the present situation that network security equipments are deployed widely but their security strategies are not open to public, this paper analyzed currently used general test method for network security equipments, proposed a general purpose framework for test devices based on multi-core...

A Modified Homomorphic Filter for Image Enhancement

Hailan Gu, Wenzhe Lv
In the paper, the homomorphic filter is improved , and a new filter is made , which is based on the low-pass frequency filter and high-pass filter. The performance of the new filter is analysised through comparing to other classical filter. The new filter is experimented, and its application was discussed.

Three-dimensional Vision Development of Gun Shooting Training System in MOUT

Changwei Zheng, Xiaoming Ren, Qing Xue, Yonghong Liu
Gun shooting training system in MOUT is a simulation system which can replace the real equipment and ammunition. The system is taking MOUT as background, can realize shooting commander training and shooting operation training which will raise the application ability of mortar in MOUT. This paper discusses...

The Restriction of Qualitative Reasoning Result Based on Rough Set Theory

Anyuan Han, Dongxing Fang, Anjing Han
From the analysis existing problems of Qualitative reasoning results, the necessity of qualitative constraints was put forward. Several existing Qualitative constraints were summed and a new qualitative constraints - rough qualitative constraints was advanced, which uses rough set attribute reduction...

E-commerce Security Research

Hanrong Chen, JunMei He
With the speed of computer network development, more economic activity went into the Internet era. It completed through the Internet such as online shopping, bank transfer and other commercial activities. The most important thing is for e-commerce security, e-commerce web site e-commerce activities,...

Comparison of Different Fault Detection Statistics Detectability in PCA

Tian Qiu, Xiaojing Bai
Detectability of the sensor fault detection system is the basic criteria for selecting of different fault detection statistics. and in MPCA are compared with . The complementary among them is analyzed qualitatively. Results of power plant data simulation show that and in MPCA can improve sensor fault...

A 3D Simulation System for Wireless Communication

Jingbo Mao, Lin Wang, Yan Meng
The paper discussed the key techniques to build 3D simulation environment for wireless communication system based on Vega Prime and HLA. The LOD with 2D symbols and size-keeping rendering for communication entities are designed to improve the usability and intelligibility. The invisible electromagnetic...

The Study of Data Security Transmission in Chain Businesses

Pingping Dong, Jian Guo
this text analyses the development of SMES and a new generation of chain enterprise management information system requirements for network data transmission. It mainly focuses on research how to ensure the important data transmission security between each branches and head office with present net security...

Analysis of Program Based on Function Block

Weifeng Wu
Basic block in program analysis plays an important role and it be applied to wide range, such as program compilation, program optimization, reverse engineering, program correctness verification, software security analysis and core module selection, etc. The binary executable analyzed by reverse engineering...

Process Optimization of Bimetallic Composite Pipe by Investment Casting Based on ProCAST

Haiyan Tang, Jingshe Li, Hongbo Yang
The casting and solidification process of the bimetallic composite pipe were simulated by ProCAST software aiming at the misrun defect in the pipe. The causes of defect were analyzed from the factors of the pouring temperature, pouring time, preheating temperature of mold and the height of sprue. Reasonable...

Study on Trade-off between Orientation Compression and Fingerprint Recognition Performance

Xuying Zhao, Xiaokun Zhang, Geng Zhao, Kejun Zhang, Rong Qian
Integrating mutual information of fingerprint orientation with minutia template matching result can enhance the performance of fingerprint recognition system. To reduce the size of fingerprint template data in embedded system, an improved run length encoding algorithm for fingerprint template compression...

An Algorithm of Association Rule Mining Based on Memory Indexing

Yong Huang, Huamei Sun
In the field of data mining, Apriori is a classical algorithm for mining association rules. In this paper, an improved Apriori algorithm is proposed, which is based on the principle of memory indexing. By recording unnecessary scanning transactions and storing relatively frequent transactions, the algorithm...

Study and Application on the Method of Association Rules Mining Based on Genetic Algorithm

Xinhang Xu, Hongtao Zhang, Lei Wang, Yonghong Liu, Qiuhong Sun
This article is mainly discussing the application of genetic algorithms to data mining of association rules, and proposing method of extract association rules using genetic algorithm, at the same time discussing genetic algorithm coding methods and construction of fitness function and improvement of...

Control for Reheat Steam Temperature of Power Plant Based on Particle Swarm Optimization

Hongtao Zhang, Hongli Hu, Xinhang Xu, Yonghong Liu, Lei Wang
The model of reheat steam temperature of power plant has characteristics such as large delay and large inertia, the traditional PID control is difficult to achieve good results. his paper presents a new PSO with random acceleration factors and verifies its validation , also, this paper presents a new...

Study on EGR Control Strategy for Vehicle Engine Based on Simulation

Yongfeng Liu, Qinhui Zhou, Jianwei Yang, Aihua Zhu
to carry out electronic control EGR strategy in diesel engine the calculation model using GT-POWER is built. the thesis uses simulation software GT-POWER to establish the calculation model of 4JB1 intake system of turbocharged diesel engine with EGR system and the results agree well. According to the...

Simulation for Improvement Plan of the Fluidized Bed Structure in the Bulk Cement Tanker Based on FLUENT

Weichi Pei, Ju Han, Yaogang Li
Structural parameters of the fluidized bed is the most important components to influence the performance index of the bulk cement tankers. The paper is focused on some types of bulk cement tank truck, proposed to a research programs to improve the fluidization quality of the fluidized bed that substitute...