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2010 Vol. 36, No. 4

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Cognition behavior model for air combat based on reinforcement learning
Ma Yaofei, Gong Guanghong, Peng Xiaoyuan
2010, 36(4): 379-383.
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A cognition model was proposed to support tactical decisions for simulated fighters to fight with each other in a virtual combat, and reinforcement learning (RL) technology was used to acquire knowledge. The combat situation was described by multi-attributes, which resulted in a high dimensional pro...
Deformation behavior of sands under cyclic non-proportional loadings
Tong Zhaoxia, Zhang Jianmin, Yu Yilin, Zhang Ga
2010, 36(4): 384-387.
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Drained tests for non-proportional loadings involving with cyclic variations of the deviatoric stress and principal stress axes were conducted on sands with a hollow cylinder apparatus at Hong Kong University of Science and Technology. The test condition was controlled to be that principal stress ax...
Numerical simulation of two-dimensional fluidic throat skewing vector nozzle
Wang Fei, Eriqitai Li, Jiajun Wang
2010, 36(4): 388-390.
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The flow fields of the two-dimensional fluidic throat skewing vector nozzle were simulated numerically. The effects of the single side injection at the throat and the assisted injection at the divergent section on the flow and the performance of the nozzle were studied. These simulations show that t...
Model-based optimization and calibration of piston aero-engine
Zhao Lifeng, Li Yunqing, Cheng Chuansong, Wang Haiying
2010, 36(4): 391-394.
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Abstract:
Multiobjective optimization model of aero-engine torque and fuel economy was established in Boost and Matlab environment. The progress of the calibration was elaborated, including building Boost model, design of experiment(DOE)tests, mathematical statistical modeling ,the response surface of variabl...
Large mass flowrate gas-gas injector optimization design with response surface methodology
Du Zhenggang, Li Mao, Jin Ping, Cai Guobiao
2010, 36(4): 395-398.
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In order to investigate the effect of design parameters of dual shear coaxial injector that utilizes gaseous oxygen and hydrogen as propellants on the combustion location, the numerical simulation efforts were performed to simulate the flow field of combustor with orthogonal array applied to guide t...
Singularity free universal variables method to solve Lambert transfer
Peng Kun, Xu Shijie
2010, 36(4): 399-402.
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The conventional universal variables method has singularity in solving the velocities at transfer time of Lambert transfer orbit when angle between two position vectors is 180°, and may lose some important universal variables by using Newton method. The singularity free formulas for solving velociti...
Pilot performance evaluation model based on BP neural networks
Liu Zhongqi, Yuan Xiugan, Fan Yubo
2010, 36(4): 403-406.
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In order to evaluate pilot performance objectively, back propagation(BP) neural network model of 6-14-3 form in topology with eye movement data was established. Data source of BP neural networks that came from former experiment and random interpolation was divided into training set and test set and ...
Class of multiple-revolution impulsive rendezvous with priority of minimum fuel
ZHANG Feng-Yu, YANG Meng, WANG Song-Yan, WANG Zi-Cai
2010, 36(4): 407-410.
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For two-impulsive rendezvous using multiple-revolution Lambert solutions, the relationship between characteristic velocity (Δv) and semi-major axis of transfer trajectory was considered. It was proposed that the optimal solution actually is the less fuel trajectory among 2N+1 trajectories satisfying...
Structural dynamic response characteristics of supercavitating underwater vehicles
Zhang Jinsheng, Zhang Jiazhong, Wei Yingjie, Cao Wei
2010, 36(4): 411-414.
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The relation between the impact loads on supercavitating underwater vehicle’s tail and the vehicle’s velocity was advanced firstly, with the method of combining the conclusions. Then, the structural response and deformation characteristics of the vehicle were studied by finite element method (FEM). ...
Evaluation of XY-SAS model for separated flows
Gao Ruize, Xu Jinglei, Zhao Rui, Yan Chao
2010, 36(4): 415-419.
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Xu-Yan-scale adaptive simulation (XY-SAS)is a new one-equation scale-adaptive simulation model proposed on the basis of average vorticity. It resolves the reynolds average navier-stokes(RANS)-large eddy simulation(LES) interface problem in detached eddy simulation (DES) with much smaller computation...
Robust control method for disturbance rejection on axial magnetic bearing
Ding Li, Fang Jiancheng, Wei Tong, Zheng Shiqiang
2010, 36(4): 420-423.
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Abstract:
Considering the requirements of robust stability and dynamic performance to reject disturbance, the problem of low bandwidth was analyzed when applying the disturbance observation(DOB) in the magnetic bearing. It was pointed out that the magnetic bearing was affected by outside low bandwidth noise, ...
Method and its system of Java source and byte code plagiarism detection
Li Hu, Liu Chao, Liu Nan, Li Xiaoli
2010, 36(4): 424-428.
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A plagiarism detection approach to detect both Java source code and byte code was proposed. The proposed method compares Java source files or class files by multiple similarity measures developed to represent the syntax structures and semantic features of the programs. An efficient plagiarism detect...
Robust facial expression recognition under occlusion condition
Xue Yuli, Mao Xia, Caleanu Catalin-Daniel, Lü Shanwei
2010, 36(4): 429-433.
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Abstract:
A novel method for facial expression recognition which is robust to facial occlusion was proposed. Firstly, the face to be recognized is reconstructed using robust principal component analysis(RPCA), and saliency detection was used on the difference image of reconstructed face and the face to be rec...
Efficient arithmetic for space partitioning
Liu Zhongtie, Ma Dongli
2010, 36(4): 434-437.
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An efficient algorithm was provided for space partitioning of triangular facets. The algorithm based on judging the position relationship between a 3D point and a unit cubic, and extended to the straight-lines and triangles- partitioning. A new method of triangle-facet targets fast partitioning was ...
Reusable method of requirement modeling
Tang Wenzhong, Deng Jingwen
2010, 36(4): 438-442.
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A reusable requirement method of software (RRM) was proposed. The method defined a set of reusable requirement modeling process (RRMP) and combined with the software manufacture development of organization manager management domain. Requirement customing & application developing platform (RAP) w...
Environment referring factor based on proportional hazards model
Hong Dongpao, Ma Xiaobing, Zhao Yu, Zhang Lin
2010, 36(4): 443-446.
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The relations of reliability and environment factors were described by the proportional hazards model (PHM). Using the model,the influences of environment factors on reliability were measured quantificationally. A calculation method of environment referring factor was proposed. In the method,the var...
Sort-first rendering clusters with dynamic load balancing
Chang Hui, Lei Xiaoyong, Dai Shuling
2010, 36(4): 447-450.
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To solve load imbalance problem among the nodes of rendering clusters, a sort-first rendering cluster was proposed. The deferred shading was used as major rendering method in the graphics applications of the proposed rendering cluster. Algorithms of deferred shading were classified as visibility tes...
Calculation methods for mean waiting time of maintenance support
Wen Jia, Kang Rui, Qiao Li, Cheng Hailong
2010, 36(4): 451-454.
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In order to analyze and evaluate the timeliness of the support system during the design and development phase, the concept of waiting time of maintenance support (WTMS) was discussed. The impact factors of WTMS during the design process of the support system for the equipment was analyzed, including...
Topology optimization design of frame structure for magnetic suspension control moment gyroscope
Liu Fengrui, Zhao Libin, Han Bangcheng, Fang Jiancheng
2010, 36(4): 455-458.
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Abstract:
The finite element model of frame structure for magnetic suspension control moment gyroscope (MS-CMG) was established and a modal analysis was implemented. On the view of the numerical results the optimization opinions of the frame structure were presented. The topology optimization module for conti...
Beyond visual range interception effectiveness evaluation of formation fighter
Zheng Jiang’an, Ma Dongli, Zhao Juanjuan
2010, 36(4): 459-463.
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Evaluation problem of formation fighter’s beyond visual range interception effectiveness was studied by Lanchester theory. Comparing hypothesis condition of Lanchester theory with actual background of beyond visual range interception, detection and attack phases of interception mission were respecti...
Fatigue properties of S06 steel in long life regime under ultrasonic frequency
Hu Yanhui, Zhong Qunpeng, Zhang Zheng, Han Bangcheng
2010, 36(4): 464-468.
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S06 steel is a new kind of precipitation-hardened stainless martensite steel. The fatigue properties between 106~109 cycles of S06 steel were tested with ultrasonic fatigue testing machine. Results show that fatigue failure takes place after 107 cycles and an endurance limit does not exist for S06 s...
Numerical simulation of combustion for GH2/GO2 gas-fired shear coaxial injector
Li Mao, Du Zhenggang, Jin Ping, Cai Guobiao
2010, 36(4): 469-473.
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To research the performance of the gas-fired injector in full flow staged combustion(FFSC) cycle engine, a gas-fired shear coaxial injector was simulated to obtain the performance of combustion. The gaseous hydrogen and gaseous oxygen (GH2/GO2) preburners were utilized to provide the hydrogen-rich g...
Unmanned aircraft vehicle path planning based on image skeleton and greedy algorithm
Zhao Yongjia, Dai Shuling
2010, 36(4): 474-477.
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To ensure the mission success rate for low attitude penetration, a path to meet the restriction of the unmanned aerial vehicle-s(UAV) capability with high survivability must be planned.By improved the traditional artificial potential field approach, a novel method was presented based on image skelet...
Error modeling and compensation for indirect stabilization electro-optical targeting system
Xu Yefeng, Meng Qingji, Wang Lei, Feng Peide
2010, 36(4): 478-481.
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In order to improve the precision of indirect stabilization electro-optical targeting system, the line-of-sight error model of the system was established. The rotation-modulation approach was studied for alleviating the drift error of the gyro. The speed measurement method by combining tachogenerato...
Design and parametric analysis of front suspension of new sport car
Jiang Libiao, Liu Yonghua, Gu Fangde, Wei Tao
2010, 36(4): 482-485.
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To satisfy people-s pursuing for individuality, an assumption of designing a new sport car was presented. Front double-wishbone suspension was designed basing on the whole vehicle-s design parameters and suspension design theories. Suspension-s virtual prototype modeling was built in ADAMS/View. By ...
Prediction modeling based on Bayes support vector machine
Hu Wenliang, Wang Huiwen
2010, 36(4): 486-489.
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To solve the uncertainty, nonlinear and coupling problem of statistical data, Bayes support vector machine(BSVM) was proposed to predict their development trend. Herein, the uncertainty of data was described as BSVM weights with Gauss distribution. Based on the prior probability and Bayes theory, th...
Expert system on cost control for complex equipment
Wang Fei, Wei Fajie
2010, 36(4): 490-494.
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Because the research and development of complex equipment have a long cycle, cost too much and are high-risk,a cost control structure of large scaled complex equipment development according to the feed-forward control was presented. At the same time the method of knowledge representation and inferen...
Spectral interpolation measurement algorithm of high accuracy on signals in power network
Wu Jing, Jin Haibin
2010, 36(4): 495-499.
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In the condition of asynchronous sampling, the long-range spectral leakages, short-range spectral leakages and negative frequency spectral leakages will be caused by using Fourier transforms to analyze the harmonics in power network. To improve the measurement accuracy, the spectrum leakage error ex...
Query clustering using user-query logs
Jia Rongfei, Jin Maozhong, Wang Xiaobo
2010, 36(4): 500-503.
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A new query clustering method on user-query log was presented. Traditional clustering techniques focused on queries and click-through logs, which are often sparse. The average cluster size is often small. In contrast, the user-query log is much denser as well as noisier. To reduce the influence of t...

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