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2008 Vol. 34, No. 06

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Monocular vision-based navigation algorithm for mobile robots in unknown environments
Zhan Qiang, Wu Jia
2008, 34(06): 613-617.
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A monocular vision-based navigation algorithm for mobile robots moving in unknown environments was presented, which consists of obstacle detection, monocular vision based distance measurement and local path planning. In order to decrease the impact of lighting disturbance on obstacle detection, pixe...
UV treatment of blended epoxy resin and its surface chemical reaction
Yang Guang, Huang Pengcheng
2008, 34(06): 618-621.
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The cationic ultraviolet (UV) curing blends of bisphenol A epoxy resin E-44 and silicone-epoxy resin ES-06 were investigated． The UV-curing condition was explored to optimize blended resin formulation． The variations of physical and chemical properties of UV-cured sample surfaces were investigated b...
Environmental analysis based on PNN and EMD for vibration of spacecraft
Yang Hai, Cheng Wei
2008, 34(06): 622-626.
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In view of the disadvantages of the traditional time-varying parameters modeling algorithm about nonstationary random vibration signal of a spacecraft with closed spaced modal frequency, a multicomponent process neural network (PNN) autoregressive model was proposed, which was based on the empirical...
Model of radar network detection based on average RCS value of different angle territory
Li Ying, Huang Peilin, Wu Zhe
2008, 34(06): 627-629.
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There are great differences among the target-s radar cross section values in its different angle territory. A new model about mono radar detect probability and radar network comprehensive detect probability was presented. The model was based on the target-s average radar cross section value in its d...
Parameter estimation and elimination to fractal noise of fiber optic gyro
Wu Huawu, Ren Zhang
2008, 34(06): 630-633.
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There are Gauss white noise and fractal noise in drift of fiber-optic gyro. It is difficult to eliminate this mixed noise using traditional time series analysis method. Based on wavelet analysis, a new parameter estimation approach step by step for fractal stochastic processes and added white noise ...
Longitudinal stability of an agriculture aircraft during low-altitude flight operation
Yue Ting, Wang Lixin, Kuang Long
2008, 34(06): 634-637.
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The longitudinal aerodynamics of agriculture aircraft during low-altitude flight operation was analyzed. And the longitudinal static stability criterion in ground effect was discussed, including the effects of major aerodynamic derivatives on longitudinal static stability. By the five-order small-di...
Tensile properties simulation of two-dimensional woven reinforced composite laminates after high velocity impact
Zou Jian, Cheng Xiaoquan, Chen Hao, Shao Shigang
2008, 34(06): 638-642.
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The tensile performances after high velocity impact of two kinds of two-dimensional woven reinforced composite laminates often used in helicopter structures were analyzed. As for high velocity impact damage characteristics of composite laminates, a finite element model, using commercial software and...
Rapid frequency acquisition and tracking for pilot pulse carrier
Zhang Jianglin, Lü Shanwei, Dong Shengbo, Wei Zhimian
2008, 34(06): 643-646.
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To aim at short-time pilot pulse carrier-frequency synchronization, a rapid acquisition and tracking approach was proposed. In this approach, a phase deduction frequency estimator (PDFE) was employed to perform initial carrier-frequency coarse estimation and accomplish frequency acquisition in short...
Three-dimensional self-localization scheme for wireless sensor networks
Liu Yuheng, Pu Juhua, He Yang, Xiong Zhang
2008, 34(06): 647-651.
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A novel three-dimensional (3D) self-localization scheme APIT-3D (approximate point-in-te-trahedron) was presented for wireless sensor networks (WSNs). The target sensor performed APIT-3D test to judge whether it resided inside or outside of tetrahedrons, which narrowed down the possible location are...
Variable structure control of testing bed drive for aero hydraulic pump
Bai Guochang, Wang Zhanlin, Chen Juan
2008, 34(06): 652-655.
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It is necessary to test the hydraulic power on ground, the method of frequency inverter+asynchronous motor+increasing gear box is one of advanced and effective way in the testing of aero hydraulic pump on ground. The mathematical model of drive system with vector control inverter of aero testing b...
Team autonomous entity path planning algorithm TAEPP
Zheng Yanbin, Zhao Qinping
2008, 34(06): 656-660.
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Through analyzing of team autonomous entity path planning problem, a path planning algorithm TAEPP (Team Autonomous Entity Path Planning) was proposed. It is a centralized global planning method. Using mended A* algorithm ,can get path for team leader, and through optimizing,the table of key points ...
Modeling strategy of principle component regression
Wang Huiwen, Wang Jie, Huang Haijun
2008, 34(06): 661-664.
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When the mechanism and the reason of failure of the classical principal components regression were analyzed, a new strategy of PCR modeling was presented as:①deriving all components and modeling with all these components; ②exclude all components which were not significant in t-test; ③modeling with t...
Autonomous orbit determination and precise measurement of relative position of formation constellation
Ma Jun, Xiao Yelun
2008, 34(06): 665-668.
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A fully autonomous, highly precise method of orbit determination and measurement of relative position for formation constellation was proposed, and the basic scheme, its feasibility and engineering specifications of space absolute orientation——one of the key techniques of autonomous orbit determinat...
Novel local route discovery algorithm in ad hoc networks
He Yang, Zhang Ting, Chen Zhenyong, Xiong Zhang
2008, 34(06): 669-672.
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In ad hoc networks, to solve the high level of routing overhead problem while on-demand routing protocols using full-net query flooding during route discovery, a local route discovery algorithm was proposed to reduce the routing overhead. Nodes around every route calculated the minimal hop counts to...
New estimation method of target’s radial velocity for stepped-frequency radar
Tian Jinjun, Liu Lin, Xue Minghua
2008, 34(06): 673-676.
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A new radial velocity estimation method was presented to compensate the effects of the target-s radial velocity on range profiles synthesized from a stepped-frequency radar. Theoretical analysis indicates that the correlation function derived from two sequential bursts- normalized complex samples of...
Neural network control in active vortex control based on low aspect ratio flying wing
Kong Yinan, Wang lixin, Qian Weiqi, Wang Qing
2008, 34(06): 677-680.
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A low aspect ration flying wing aircraft was researched. Full state feedback controller was used for the continuous control effectors to improve the stability of aircraft. To improve the control ability, a vortex flow controller(bang-bang controller) based on three layers BP neural network was used....
Applicability compensation method for random drift of fiber optic gyroscopes
Wang Xinlong, Ma Shan
2008, 34(06): 681-685.
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Based on the limitation of founding a time-sequence model and using Kalman filter to wipe off the random noise, an adaptive Kalman filtering arithmetic for on-line compensation of the random errors of fiber optic gyroscope (FOG) was presented. As emerging error in a time-sequence model, the time-var...
Stiffness control technology and application in magnetic rods
Wang Bin, Dong Yunfeng
2008, 34(06): 686-689.
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Control torque along geomagnetic vector could not be generated by magnetic rods when they are employed in momentum bias satellites with a pitch dipole moment. Stiffness control policy was developed to provide control torque by using magnetic rods to accelerate the motion of angular momentum vector a...
Temporal and spatial analysis of infrared images from water jet in frequency domain based on DFT
Gong Weili, Zhao Haiyan, An Liqian, Mao Lingtao
2008, 34(06): 690-694.
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Based on 2-D discrete Fourier transforms (DFT) of infrared images from water jet and the analyses of its 2-D spatial spectrum, investigations were made on the spatial scales of passive scalars turbulent flow in high pressure water jet fields, which are represented by infrared images. The characteris...
Numerical simulation of ethanol solution heat transfer in rectangular microchannels
Xi Youmin, Yu Jianzu, Gao Hongxia, Cao Xuewei
2008, 34(06): 695-698.
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Owing to the factors influencing microchannel heat transfer behavior are complicated, the experimental results were contrary each other. The combination of experiment and numerical simulation has become a valid method to get deep understood of the heat transfer characteristics. On the basis of exper...
Extraction method of rectangular building based on fussy decision-making
Mao Xia, Zhao Xingyuan, Shen Wei
2008, 34(06): 699-702.
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The roof of the building in aerial image is generally rectangle or parallelogram. It makes a significance sense to extract the rectangle accurately and fast, either in military aspect or in civilian aspect.A method based on fussy decision-making for extraction of rectangular buildings from the aeria...
Robust image communication system based on wavelet transform analog coding
Wang Zhe, Zhang Xiaolin, Chen Lei
2008, 34(06): 703-706.
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For the applications with complexity and delay limit or in varying channel condition, joint source-channel coding (JSCC) helps to improve the conventional tandem communication system since the integrative system design. For bandwidth and power-limited analog channel, an analog coding and transferrin...
Design of cell image acquisition system based on DSP and FPGA technology
Fan Shangchun, Zhou You, Liu Changting, Wang Junfeng
2008, 34(06): 707-710.
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It is a problem to trace and record the growth of the large number of cells manually for a long time. Aiming at the mass data, high sampling frequency, complex caculation and other problems in cell image transmission, a novel method of video image acquisition is described. The key problems in the de...
Approach based on compiling optimization and disassembling to detect program similarity
Zhao Changhai, Yan Haihua, Jin Maozhong
2008, 34(06): 711-715.
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An approach based on compiling optimization and disassembling was proposed to detect similarity in computer programs. It can detect 12 modification strategies that are often used by students, such as renaming identifiers, adding redundant statements and replacing control structures with equivalent s...
Fuzzy control design of uncertain nonlinear active fault tolerant control systems
Bai Mingzhen, Wu Huaining
2008, 34(06): 716-720.
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By considering the random nature of the failure events and the FDI(failure detection and isolation)decisions in real FTC(fault tolerant control)systems, two Markov processes were introduced to describe the random failures and the FDI decision behavior separately. The Takagi and Sugeno fuzzy model wa...
Lightweight single sign-on service mechanism for portal
Luo Xin, Wu Jing, Xiong Zhang, Pu Juhua
2008, 34(06): 721-724.
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An integration framework with easy and efficient implementation is necessary in construction process of information portal. To overcome the limitation that traditional single sign-on mechanisms can-t achieve fast integration in dynamic and loose coupling environment, a novel lightweight single sign-...
Driving torque special solution constructive approach of redundant actuated manipulator
Yan Caixia, He Guangping, Lu Zhen
2008, 34(06): 725-728.
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Taking redundant actuated manipulator with planar 3 degree of freedom as subject investigated, the kinematics model was deduced. Based on the virtual work principle and the equivalent force theory, the dynamic model was built. After the fault tolerant performance of redundant actuated manipulator wa...
Gram-Schmidt regression and application in cutting tool abrasion prediction
Wang Huiwen, Chen Meiling, Gilbert Saporta
2008, 34(06): 729-733.
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Multiple linear regression is one of the most widely applied statistical methods in scientific research fields. However, the ordinary least squares method will be invalid when the independent variables set exists server multicolinearity problem. A new multiple linear regression method, named Gram-Sc...
Topic model based structural Web services discovery
Chen Jiangfeng, Yu Jianjun
2008, 34(06): 734-738.
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A structural Web services discovery approach based on a topic model was proposed. Each Web service would be modeled as a structural textual document using probabilistic model generated by latent dirichlet allocation (LDA). Every document could be seen as a multinomial random mixture of topics, and e...

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