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2005 Vol. 31, No. 01

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Study of transition metal silicides thin film epitaxial growth on silicon substrate
Wang Jinliang
2005, 31(01): 1-4.
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Transition metal(TM)-silicon contact systems have received special interest because of their importance in Schottky barrier formation, epitaxial growth, device reliability, refractoriness, etc. The formation of silicides from the reaction between deposited thin metal films and Si substrates has wide...
Adaptation scheme based on network testing and performance analysis
Zhang Yuqing
2005, 31(01): 5-7.
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In packet-switched IP networks, congestion perhaps is unavoidable. Therefore, it is necessary to perform congestion control for real-time multimedia service. Usually, loss rate is considered as the sign of the network congestion and AIMD is the adjustment scheme. It is difficult to obtain the optima...
Zinc alloyed coating on AZ91D magnesium alloys
Zhu Liqun, Liu Huicong, Li Weiping, Song Guangling
2005, 31(01): 8-12.
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In order to improve the corrosion resistance and micro-hardness of AZ91D magnesium alloys, its surface was treated by zinc alloys. The characterization of the above-prepared coating on AZ91D magnesium alloys was studied, andits surface image, cross-section image, XRD image, corrosion resistance abil...
Structural bionics for reinforcing frame of fuselage and wing joint
Cen Haitang, Chen Wuyi, Yu Maolin, Liu Xuelin
2005, 31(01): 13-16.
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Similarity is the base of bionics. Comprehensive explanation of functional demand in engineering prototype and superiority of biologic structures in all levels, accurate understanding the similarity of organisms and engineering prototype, these are the key of the bionic structure design. To decrease...
Measure technology of the center of gravity of ejection seat-pilot system
Wang Xingwei, Wu Ming, Zhang Xing, Yuan Xiugan
2005, 31(01): 17-20.
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To solve the stability adjustment problem of pilot-seat system after ejecting from fight plane cabin, a new electronics equipment which can measure the combined center of gravity of pilot-seat system was designed and manufactured, a new pitching-progressive measure and calculate technique was founde...
Long-range air-to-air missiles combat system
Jiang Yuxian, Liu Hui, Shen Yang
2005, 31(01): 21-24.
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The effective technique approach to realize the air combat by use of long-range air-to-air missiles was studied. The communication net, which is used to get movement information of long-range targets and transmit the missile’s guidance command information, was composed of various detecting and commu...
Study on characterizing streaming media and user access to media on the Internet
Cai Qingsong, Li Zimu, Hu Jianping
2005, 31(01): 25-30.
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Through tracing the log data of four typical streaming servers of CERNET, the characteristics of streaming media and its access pattern to attempt to give evidence of the key component design or simulation in streaming system such as streaming proxy in CDN were analyzed. The results show that the si...
Fast simulation of complex image for interferometric SAR
Li Wenqiang, Li Jingwen, Chen Jie
2005, 31(01): 31-35.
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To validate the capability of interferometric algorithm and give useful complex INSAR data for INSAR study, a new method of INSAR (interferometric SAR) simulation was carried out. As the backscattering coefficient and thermal noise and other factors were concerned, a model of simulation of INSAR bas...
Implicit model following technique for aircraft configuration with multiple control surfaces
Zhou Jie, Zhang Shuguang
2005, 31(01): 36-40.
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The implicit model following technique, based on linear quadratic theory, was applied to design the flight control augmentation system (FCAS) of an aircraft with multiple control surfaces. The selection philosophy for the ideal model was investigated, which is based on the flight dynamics and the fl...
Analysis on reach envelop of pilot in cockpit
Wang Lijing, Yuan Xiugan, Li Yinxia, Wang Yongqing
2005, 31(01): 41-44.
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The method to obtain reach basket envelopes data was depicted, and a model of reach basket envelopes analysis was set up. The neutral seat reference point was defined coordinate origin, then reach basket envelopes data of American air force men was converted to that of Chinese with coordinate transf...
Attitude algorithm for strap-down inertial navigation system
Liu Wei, Xie Xuhui, Li Shengyi
2005, 31(01): 45-50.
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Under the condition of high dynamic angular motion or vibration environment, determining and compensating the non-commutivity vector is important tocalculate the attitude matrix of strap-down inertial navigation system. To compensate the coning error introduced by the non-commutivity vector, many cu...
Flight vehicles multidisciplinary design optimization software system
Wang Shuhe, He Linshu, Zhang Yuzhu
2005, 31(01): 51-55.
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In order to solve difficulties of flight vehicles overall design, a software for flight vehicles multidisciplinary design optimization was introduced. Which adopts a "loose coupling" algorithm, uses SQL Server 2000 as its data base management system(DBMS), and combines with various analytical progra...
Experimental research of sound excitation on flow of subsonic compressor blade profile in planar cascade tunnel
Hou Anping, Jiang Zhengli, Ling Daijun, Zhou Sheng
2005, 31(01): 56-59.
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A lot of work was done in planar cascade tunnel to validate the theory on two generations of unsteady flow type. In the first phase ,the frequency of all kinds of work condition was got. In the second phase, the method of sound excitation was used based on the frequency got forward to research the i...
Design on inference engine of the spacecraft thermal fault diagnosis expert system
Wei Chuanfeng, Li Yunze, Wang Jun, Yu Tao
2005, 31(01): 60-62.
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When a spacecraft is on mission, various unpredictable faults often occur. It is very important that spacecrafts should be capable of diagnosing thermal faults automatically because most of them are difficult to be repaired on orbit, which requires a credible inference engine. And many rules and cas...
Virtual environment based on Internet and Java3D for multi-robot teleoperation
Gao Sheng, Zhao Jie, Cai Hegao
2005, 31(01): 63-68.
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For an internet-based multi-robot teleoperation system, two critical issues of random time-delay and multi-robot coordination were studied. For the first issue, a virtual environment, which is constructed on the basis of Java and Java3D technologies, was employed to resolve time-delay problem by onl...
Analysis of design calculation methods of scramjet combustion chamber
Wang Yuanguang, Xu Xu, Cai Guobiao
2005, 31(01): 69-73.
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To find a proper way to calculate the performance of scramjet combustor and evaluate the present methods, one-dimensional chemical dynamics method was brought forward and tested with several cases. Calculation was carried out with three different methods: impulse analysis, one-dimensional chemical d...
Solution on fingerprint verification based on smart cards
Li Meihong, Zhang Qishan
2005, 31(01): 74-77.
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The abilities of computation and storage for smart card were utilized, the fingerprint template was not only stored in it, but also the fingerprint matching process was implemented on it, but other processes of fingerprint recognition algorithm were performed on an authenticated reader/writer. The p...
ADS and multi-radar bias registration algorithm for ATC system
Jiang Naixin, Zhang Jun, Luo Xiling, Liu Wei
2005, 31(01): 78-81.
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The data fusion model of ADS and multi-radar surveillance system in air traffic control was analyzed and an ADS and radar system bias registration algorithm using the least square(LS) technique was given based on the conventional method in the multi-radar surveillance system. The optimal solution wa...
Image processing and analysis algorithms for measuring log volume
Long Defan, Fan Shangchun, Pang Hongbing
2005, 31(01): 82-85.
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The key image processing and analysis algorithms were investigated and designed based on operating principle of the automatic system for log volume measurement. Hough transform (HT) was applied to the image since log ends are quasi-circular. Peaks of the HT were detected in maximal balls correspondi...
Adaptive regulation on the thermal deformation of the panel of compact antenna test range
Wang Zhaojun, Chen Wuyi
2005, 31(01): 86-88.
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The temperature of compact antenna test range may vary from 15℃ to 25℃accompanied by the seasons. The thermal deformation often exceeds the allowed error. Its deformation under the loads of temperature、gravity and reverse force was analyzed with MSC.MARC. For the worst case, the data of the deformed...
Passive TDOA location algorithm for eliminating location ambiguity
Chen Ling, Li Shaohong
2005, 31(01): 89-93.
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The problem of eliminating location ambiguity in passive time difference of arrival(TDOA) systems is considered. The accuracy analysis and the simulation results of four-variable algorithm show that its performance is poor regardless of the capability of eliminating location ambiguity. Based on the ...
Design of the flute grinding parameters to be produced with parallel grinding machine
Pei Baoqing, Luo Xueke, Chen Wuyi, Huang Bo
2005, 31(01): 94-97.
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The flute machining is important to produce a milling cutter. The geometric parameters (especial its rake angle,flute depth and flute width) have essential influence on the performance of the tool. Using a 6-UPS parallel machine,based on analyzing its special machining and structure features,general...
In-vehicle information platform based on GPRS
Zhang Zhengxuan, Zhang Qishan
2005, 31(01): 98-101.
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Many outstanding advantages of GPRS transmission mode was analyzed, and a novel type of in-vehicle information platform was put forward, which focused on improving modernization degree of city traffic. Also, based on the actual test status, function of the system, the frame of hardware and the imple...
Study to optimize and distribute the cost of air spares support
Zhang Ruichang, Zhao Songzheng
2005, 31(01): 102-104.
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The primary works of air spares support include preparation, storage, supply and management, which need the sustainment of funds. Millions items of air spares will take a lot of money. It is essential for the improvement of the operational rate of air spares support and the availability of aircraft ...
Conceptual study of magnetic launch assist system for space launch
Yang Wenjiang, Liu Yu, Yang Bo
2005, 31(01): 105-110.
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To solve the problem of ever-increasing cost of getting to space and the need for safe, reliable, and inexpensive ways to access space, a magnetic launch assist concept and its benefits were described and discussed. Primary magnetic launch assist system configuration and each subsystem functions wer...

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