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2009 Vol. 35, No. 9

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Thermal performance analysis of antigravity suit
Qiu Yifen, Li Yanjie, Ren Zhaosheng
2009, 35(9): 1035-1038.
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To study the thermal performance of an antigravity suit, the thermal system simulation modal was build among human body, antigravity suit and environment. The suit was divided into 15 segments, each segment has different thermal resistance and gas permeability. The system heat and mass transfer proc...
Ammonium dinitramide (ADN) combustion model with detailed gas phase reactions
Duan Yi, Liu Yu
2009, 35(9): 1039-1042.
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Abstract:
A numerical calculation model with detailed gas phase reactions was developed to study the physical and chemical processes involved in ammonium dinitramide(ADN) combustion. The model was based on the conservation equations of mass, species concentration and energy, and takes into account finite-rate...
Affine invariant based on determinant points in object recognition
Wu Gaojie, Li Chao, Xiong Zhang
2009, 35(9): 1043-1047.
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The common affine invariants were very sensitive to the edge of the image, so a new method entitled "an affine variant based on the determinant points in image recognition" was proposed. First the centroid of the separated object image was computed, and then many line segments were derived through t...
Software defined GNSS reflections receiver design
Yang Dongkai, Ding Wenrui, Zhang Qishan
2009, 35(9): 1048-1051.
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Abstract:
The characteristics of navigation satellite reflected signal was analyzed. Both the architecture and the components for GNSS (global navigation satellite system) reflections receiver were presented including the two antennas, two RF (radio frequency) front ends, two high speed A/D converter and the ...
Application of PH curve in CNC look-ahead function
Wang Qikui, Li Wei, Chen Youdong, Wang Tianmiao
2009, 35(9): 1052-1056.
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A new method was developed to smooth the micro-line while machining in computer numerical control systems. Four rules including angle between transfer vectors with speed limitation, length and angle between the micro-lines with accuracy limitation and the monotonicity of the point were proposed to d...
Learning drifting user interest incrementally from numerically labeled feedbacks
Zhang Pin, Pu Juhua, Liu Yongli, Xiong Zhang
2009, 35(9): 1057-1061.
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Most incremental approaches for learning drifting user interests assume that data instances in user feedbacks are binary labeled. A novel incremental learning approach was presented which learns drifting user interests from numerically labeled feedbacks instead of binary labeled ones. User interests...
Exact linearization based modeling and control for electro-hydraulic compound regulating integrated actuator
Lang Yan, Li Yunhua
2009, 35(9): 1062-1066.
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A new designed total pressure control valve,which can keep the sum of high and low pressures of actuating cylinder be a constant and also make the two chambers pressures be controllable,was added to the classic pump controlled electro-hydraulic actuator(EHA)to enhance its natural frequency. This imp...
Signature on conic curve over Zn based on two hard problems
Lin Song, Li Zhoujun, Wang Biao
2009, 35(9): 1067-1071.
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The security of the digital signature scheme (Xiao06 scheme) on conic curve Cn(a,b) over the residue class ring Zn was analyzed. The analysis result indicates that the published parameters can make the modulus n be factorized using the Weda-s theorem, and shows that the Xiao06 scheme is not a sche...
Lake height variation measurement utilizing GNSS reflected signal carrier phase
Yao Yanxin, Yang Dongkai, Zhang Qishan
2009, 35(9): 1072-1075.
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A lake height variation measurement method utilizing global navigation satellite system(GNSS) reflected signal carrier phase was given. Carrier phase observation equations were built firstly. Then the single-differences between the carrier phase observation measurements for direct and reflected sign...
Finding most vital node by node importance contribution matrix in communication netwoks
Zhao Yihuan, Wang Zulin, Zheng Jing, Guo Xujing
2009, 35(9): 1076-1079.
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Node importance evaluation based on removal of nodes and their incident links may change the topology of the network, even splits the network into several disconnected parts.The neighbor nodes- node importance contribution matrix (NICM) was defined and an improved node importance evaluation method w...
New pairwise key predistribution scheme for wireless sensor networks
Ding Xiaoyu, Liu Jianwei, Shao Dingrong
2009, 35(9): 1080-1082.
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Abstract:
A new hypercube-based key predistribution scheme for establishing pairwise keys between sensor nodes using polynomials, which is parameterized by the dimension of hypercube and the Hamming distance threshold variables was developed. This scheme exhibits a nice property: when the Hamming distance bet...
Moving object trajectory clustering method in intelligent surveillance video
Hao Jiuyue, Li Chao, Gao Lei, Xiong Zhang
2009, 35(9): 1083-1086.
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Abstract:
Trajectory analysis is the basis of scene understanding, however noise trajectories causing by barriers in true surveillance scene will influence the result veracity. A trajectory similarity measure and clustering method to segment a scene into semantic regions were proposed to eliminate the effect ...
Observer-based control for a class of nonlinear networked control systems
Zhu Guizhi
2009, 35(9): 1088-1090.
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Considering the data packet dropout between sensor and controller, when some states of the object cannot be measured directly, a class of networked control systems (NCSs) with nonlinear perturbing terms in the plant was investigated. There is a network between the sensor and controller. The network ...
Advanced spectral unmixing algorithm based on spectral information divergence
Xu Zhou, Zhao Huijie
2009, 35(9): 1091-1094.
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Spectral unmixing is a key issue of quantitative remote sensing. An advanced spectral unmixing algorithm based on per-pixel optimal endmembers selection named spectral information divergence-spectral mixed analysis (SID-SMA) was proposed. It determined the optimal endmembers subset using the criteri...
Method for investigation of combustion flowfield characteristics in single element gas/gas injector chamber
Wang Xiaowei, Jin Ping, Cai Guobiao
2009, 35(9): 1095-1099.
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Abstract:
To facilitate hot-fire tests of single element gas/gas injector chamber, a method used to reveal the combustion development and completion length of the chamber flowfield was designed, which combines wall temperature measurement and numerical simulation of gas/gas combustion flowfield. The impacts o...
Modal parameter identification based on image streams under disturbance measurement environment
Li Jing, Cheng Wei
2009, 35(9): 1100-1103.
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Abstract:
To aim at structure modal parameter identification,a method based on a sequence of 2D images was proposed．Chose certain feature points from the object whose modal parameter need to be identified．Factorization method was employed on the image streams taken by CCD camera to solve structure from motion...
Monotone restriction model of reliability growth evaluation
Liu Zhiyang, Liu Lu, Huang Min
2009, 35(9): 1104-1107.
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Abstract:
The test data of large complex products presents small sample characteristic in each phase during the development process normally. The restriction, the reliability of one phase is always higher than that of the previous one, was recommended to be used for reliability evaluation based on multi-phase...
Simulation experiment on air flow and heat transfer of fight plane’s cockpit
Shen Haifeng, Yuan Xiugan
2009, 35(9): 1108-1112.
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A full-scale experiment was carried out on air flow and heat transfer of a fight plane-s cockpit. Aerothermal load and body heat load were simulated, and ATM2400 36-channel airflow and temperature instrument were used to measure velocity fields of 5 measurement planes and temperature fields of 2 mea...
Ionosphere fitting method and path parameters analysis
Han Yifeng, Yan Zhaowen
2009, 35(9): 1113-1116.
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Anti-parabolic model that function as the joint layer was adopted to describe the electron density distribution between the quasi-parabolic multi-lays in ionosphere. The parameters of the anti-parabolic layer, such as critical frequency, semi thickness and the layer bottom radial distance from earth...
Modeling of wireless datalink communication region between two aircraft
Yu Fuzhang, Cai Zhiyong, Hu Yingqiong
2009, 35(9): 1117-1120.
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A mathematical model of communication region should be developed for realizing normal communication of two aircraft in flight. Based on the air-to-ground wireless datalink communication, the wireless datalink communication area between two aircraft was analyzed by considering the factors such as tra...
Calculation of aircraft exhaust system infrared characteristics based on SNBCK model and finite volume method
Hu Haiyang, Wang Qiang
2009, 35(9): 1121-1124.
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The coupled calculations for flow fluid field, species concentration field and gas radiation transfer /energy equations based on SNBCK model were employed to simulate accurately the aerothermodynamic and infrared characteristics of the aircraft exhaust system. The parameters of narrow-band model wer...
Design of ethanol micro gas turbine engine
Zhang Chi, Wang Jianchen, Qin Qingqin, Du Peng
2009, 35(9): 1125-1129.
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To develop the application of the biomass fuel in micro-turbine-based distributed energy system, micro gas turbine using ethanol as fuel was designed. The design operation parameters of this micro gas turbine were determined by thermodynamic cycle. Based on the parameters and the characteristic of e...
Rapid resolution of GPS ambiguities of satellite formation flying with two-step method
Wang Haitao, Ou Jikun, Yuan Yunbin
2009, 35(9): 1130-1133.
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In order to rapidly resolve the carrier ambiguities of satellite formation flying, a two-step method combined with extended Kalman filter (EKF) was proposed. The first step is to fix the wide-lane ambiguities during the state estimation after initializing the filtering with carrier-smoothed-code alg...
Randomization analysis of the thermal-mechanical crack growth
Yang Hongqin, Bao Rui, Zhang Jianyu, Fei Binjun
2009, 35(9): 1134-1138.
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In order to describe the crack growth law under thermal-mechanical loading, the linear superposition model of fatigue and creep crack growth was amended based on the experimental results. New material parameters in the model were determined, as the original ones may not be independent of the stress ...
Effectiveness analysis of multi-source decoying system against ARM
Zhao Juanjuan, Ma Dongli, Zheng Jiang-an
2009, 35(9): 1139-1143.
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Based on the theory of active decoying system against anti-rediation missile(ARM), decoy error formula was derived. Three typical distributions, which were the first three-source distribution, the second three-source distribution and four-source distribution were discussed as examples, and the error...
GA based design of sliding mode control law for hypersonic vehicle
Li Huifeng, Wang Jian, Sun Wenchong
2009, 35(9): 1144-1147.
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A sliding mode control law was presented according to the six DOF nonlinear model of pitching channel of hypersonic vehicle generic hypersonic vehicle(GHV). First, for making a good use of sliding mode control theory, the six DOF model was transformed into an affine system through input-output feedb...
Evaluate interoperability of foundational software platform by Bayesian networks
Lan Yuqing, Zhao Tong
2009, 35(9): 1148-1151.
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Interoperability is one of the most important features of current software. Bayesian networks was proposed to solve the problem of evaluating interoperability of foundational software platform after analyzing both the problem domain and the Bayesian networks feature domain. First of all, Bayesian al...
Integrated reliability assessment using varied environment test data
Hong Dongpao, Zhao Yu, Ma Xiaobing
2009, 35(9): 1152-1155.
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The influence of environment on reliability was studied, and a method of integrated reliability assessment using varied environment test data was put forward. The relations of reliability and environment factors were described by the Cox proportional hazards model, and the influences of environment ...
Improved ECS algorithm for spaceborne spotlight SAR based on deramp processing
Li Ran, Li Jingwen, Li Linlin
2009, 35(9): 1156-1160.
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Based on the two-step imaging algorithm and the extended chirp scaling (ECS) algorithm,an approach for spotlight mode of spaceborne synthetic aperture radar(SAR), which combines the deramp processing and ECS algorithm was proposed. The deramp processing is based on SPECAN algorithm, and passes the r...

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