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2008 Vol. 34, No. 03

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Forecasting method for aeroengine performance parameters
Li Xiaobai, Cui Xiuling, Lang Rongling
2008, 34(03): 253-256.
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The forecasting of aeroengine performance parameters is very important for aeroengine maintenance based on condition. To improve the forecasting accuracy, a new combination method was proposed for forecasting parameters based on analyzing the data. Firstly, the original sequence was decomposed by wa...
Sensor selection algorithm based on weighted distance in wireless sensor networks tracking
Wu Hai, Zhao Wei, Tian Bin
2008, 34(03): 257-261.
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A new sensor selection methods for bearings-only sensors, weighted-distance node selection (WNS) was proposed. Based on probability distribution function (PDF) of target estimates and sensing-model, the sensors with the minimum weighted-distance were activated in the next snapshot. Since the existin...
FFT-based acquisition method to eliminate influence caused by data modulation
Sun Guoliang, Li Yuqi, Zhang Xiaolin
2008, 34(03): 262-266.
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To achieve higher acquisition accuracy while using FFT(fast Fourier transform)-based algorithm to acquire spread spectrum signal, integration across data bit transition boundaries is necessary. However, performance degradation due to data modulation must be eliminated. Two effects of baseband data s...
Simplified method of kernel fuzzy c-means clustering for image texture classification
Yuan Yunneng, Wu Yang, Cheng Gong
2008, 34(03): 267-270.
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The fuzzy c-means clustering algorithm is a widely applied method for acquiring fuzzy pattern from data, but it is not suitable for the clustering of linear inseparable data. In mercer kernel method, the problem of nonlinear separability of classes can be tricked by projecting the input data to a hi...
Approach based on speckle reduction using SPIHT for data compression of complex SAR image
Xiang Shiyong, Li Chunsheng, Chen Jie
2008, 34(03): 271-275.
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A method based on speckle reduction using SPIHT(set partitioning in hierarchical trees) for data compression of complex SAR(synthetic aperture radar) image was presented, which could achieve both speckle reduction and image compression. According to the statistic characteristic of complex SAR image,...
Novel anti-collision algorithm in RFID system
Zhao Xi, Zhang Youguang
2008, 34(03): 276-279.
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In some radio frequency identification (RFID) systems, there are lots of tags can not be identified when tags come into and get out of the scope of the reader in a regular way, for the readers with a general algorithm do not give priority to read the leaving tags. A novel anti-collision algorithm wa...
Diversity detection algorithms in laser communications
Zheng Zheng, Li Ning
2008, 34(03): 280-284.
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The likelihood ratio function in symbol-by-symbol maximum likelihood detection was calculated with the Monte Carlo method for the atmosphere laser communication systems under the weak turbulence condition. Discrete points were mass-generated according to the marginal distribution for the turbulence-...
Fault-tolerant control method and characteristic analysis of hydraulic redundant EMA system
Zhou Yuanjun, Zhao Yunkun, Ge Yunhai
2008, 34(03): 285-289.
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A kind of hydraulic redundant electro-mechanical actuator (EMA) system used in the next generation more power aircraft was focused on, which is made up of two brushless DC motor with dual electrical channels. In such case, the fault-tolerant operation capability of‘fault -operation/fault-safe’ was a...
Palmprint recognition based on ICA and BP neural network
Chen Zhi, Huang Linlin
2008, 34(03): 290-294.
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A novel method based on independent comment analysis (ICA) and back propagation neural network (BPNN) was proposed to solve palmprint recognition. First, a new method was used to detect corner points as the invariant feature points in palm images. Then the palm images were aligned by the points, and...
Optimal ellipse fitting method based on least-square principle
Yan Bei, Wang Bin, Li Yuan
2008, 34(03): 295-298.
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The fragmental ellipse fitting algorithm based on least square was studied. The ellipse-constraint algebraic fitting always provides an elliptical solution, but the bias is inevitably added to result because the algorithm involves all the sample data including some much biased data. Based on this si...
Trajectory control and online monitoring of a parallel planar robot
Chen Weihai, Li Xiang, Yu Shouqian, Wang Jianhua
2008, 34(03): 299-303.
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Kinematic control of 3-DOF planar parallel manipulators was proposed. To realize online position trajectory planning, the inverse solution of parallel robot was discussed. Two steps were proposed to realize the online monitoring of parallel robot. The first step was using the algorithm of closed sol...
Reconfigurable controller design for missile using eigenstructure assignments
Wang Qing, Sun Rui
2008, 34(03): 304-306.
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An improved reconfigurable method for spacecraft attitude control system was designed by the eigenstructure assignments. For a kind of linear system, not only the closed-loop eigenstructure was recovered but also the cost function of the reconfigurable controller was improved based on the output fee...
Heat transfer enhancement characteristics in nature convection along vibrant surface
Wu Hong, Meng Henghui, Luo Xiang, Xu Guoqiang
2008, 34(03): 307-310.
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Based on the idea that vibrations can destroy flow and heat boundary layer, which is the main thermal resistance for heat transfer, an experiment was investigated to study the heat transfer characteristics specialty of vibrant surface in natural convection, and to get the relationship between vibrat...
Modeling and retrofit of certain turbojet
Ouyang Hui, Zhu Zhili
2008, 34(03): 311-314.
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The static performance model of certain small turbojet installed in some unmanned-air-vehicle (UAV) was established based on object-oriented component-level aero-engine simulation modules, and its fidelity was verified by data comparison between simulation and original experiment. Whereafter, accord...
P2P network-based discovery schema for semantic Web Service
Yu Bing, Ma Shilong
2008, 34(03): 315-318.
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To solve how to find the Web Service that distribute different locations efficiently and exactly, a new discovery schema for service based on P2P network and semantic description was put forward. The peers in model dynamically registered to different peer-clusters, which were managed by broker accor...
Method for precisely detecting buffer overflow vulnerabilities in C programs
Li Ji, Wang Lei
2008, 34(03): 319-322.
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Buffer overflow (BO) vulnerability in C programs is one of the most crucial threats to the security of a system. Using tools to detect and eliminate this kind of vulnerability in programs will give the system sufficient ability to maintain security environment. For the scarcity of accuracy in detect...
Routing mechanism in active Peer-to-Peer network
Li Jing, Liu Xudong, Lin Xuelian, Huang Zicheng
2008, 34(03): 323-326.
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Current routing mechanisms in unstructured Peer-to-Peer system target at locating content combined with too detailed focus on peers- need. However, these routing mechanism neglect that the peers- requirements are fuzzy and multi-faceted. Therefore, they cannot be well applied to active Peer-to-Peer....
OWL-S based test case generation
Zhang Xiaoyan, Huang Ning, Yu Ying
2008, 34(03): 327-330.
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To improve the automatization and the efficiency of the Web Service interactive test process, an automated test case generation approach was proposed, based on OWL-S (OWL web ontology language for services) requirement model. Test cases were generated for the requirement properties wanted to be veri...
Octree-based blind watermarking on 3D meshes
Qi Yue, Shu Jun, Shen Xukun, Cai Su
2008, 34(03): 331-335.
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Robust blind watermarking is the important method for digital works copyright protection. A novel blind watermarking method on 3D meshes was proposed. PCA (primary component analysis) was used for 3D meshes- preprocessing to make a unique model posture. After making division of the 3D meshes based o...
Grid service container based on SEDA
Liu Chengzhong, Liu Wantao, Hu Chunming
2008, 34(03): 336-339.
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The grid service container is a fundamental component in a service grid, which is responsible for shielding resource heterogeneity and hosting grid application services. Most current grid service container implementations adopt thread-based concurrency approach to process concurrent user requests, w...
Design and experiment of a underwater vehicle based on capacity of voyage
Wen Li, Liang Jianhong, Wang Tianmiao, Song Yongsheng
2008, 34(03): 340-343.
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The SPC-3 UUV prototype is an experimental platform which is especially designed to improve efficiency of propulsion and capacity of voyage based on the SPC-2 UUV robofish by Beijing University of Aeronautics and Astronautics. Based on the record of data collection computer and cameral which is used...
Real-time visual tracking algorithm for single moving object in clustered environment
Sun Kaipeng, Li Xinjun
2008, 34(03): 344-347.
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A visual tracking algorithm was introduced, which was completely based on image information. Several existing algorithms were integrated and improvements were made to achieve the goal of tracking one single moving object when the camera-s movements were small. A target was manually selected. Then fe...
Kinematic modeling and analysis of variable diameter wheeled lunar rover
Cui Ying, Gao Feng
2008, 34(03): 348-352.
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According to the lunar surface environmental characteristics, a new four variable diameter wheeled lunar rover which consists of a rolling-torsion all wheel steering mechanism was developed. Through the principle analysis of the variable diameter wheel, derived the wheel equivalent radius formula. T...
Autonomic detection method of space target orbit maneuver based on wavelet analysis
Zhang Zhenjun, Dong Yunfeng
2008, 34(03): 353-356.
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The change rate of relative distance is a character signal of orbit maneuver of space target. Relative distance was measured by laser radar, and the change rate of relative distance was calculated by difference of relative distance. The measure noise was enlarged so the character signal was submerge...
Optical narrowband filter and its application to fiber lasers
Zhang Chunxi, Liu Dianjun, Ou Pan
2008, 34(03): 357-360.
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Single-mode fiber laser is a very important light sources for optical sensing and optical communication. The coupled mode function of basing on saturable absorber optical narrow-band filter using numerical analysis was soluted. The factors who effected optical narrow-band filter output response prop...

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