Advanced Search

2001 Vol. 27, No. 3

  Previous Issue | Next Issue 
Display Method:
Research of Polyetheretherketon and Zirconium Dioxide Solid Alloy
ZHAN Mao-sheng, LI Jian-ping, LI Yu-bin
2001, 27(3): 249-253.
Abstract References Relative Articles Resource File Access Statistics iconViews 2425 iconDownload 1329
Abstract:
The compound of polyetheretherketon (PEEK)/zirconium dioxide (ZrO2) was distorted, fractured, and welded together, and the new phase was formed through the diffusion of all kinds of atoms of components, in high energy rotating ball mill at temperatures below the glass transition temperature of PEEK,...
Synthesis of Electron Beam Curing Resins
LI Min, ZHANG Zuo-guang, ZHONG Wei-hong, YAO Hong-wei
2001, 27(3): 254-256.
Abstract References Relative Articles Resource File Access Statistics iconViews 3172 iconDownload 1045
Abstract:
The use of electron beam (E-Beam) radiation to carry out rapid, pollution free, low energy crosslinking polymerizations of multifunctional vinyl monomers is an established technique. Polyimides and maleimides possess many useful properties such as high use temperature, excellent dimensional stabilit...
Research Advance on Bridge Function and Generalized Bridge Function
ZHANG Qi-shan, WANG Gang
2001, 27(3): 257-259.
Abstract References Relative Articles Resource File Access Statistics iconViews 2791 iconDownload 904
Abstract:
Bridge Function and Generalized Bridge Function are all three-valued function,and are made by initial sequence according as copied or shifted ways.They include some familiar orthogonal function of non-sine,such as Walsh Function.This paper briefly introduced some research advance on this subject,emp...
Design and Implementation of a Real Time Network Communication Software Based on IPX Protocol
KUANG Wei, ZHANG Xiao-lin, CUI Ying-wei, ZHOU Xiang-r
2001, 27(3): 260-263.
Abstract References Relative Articles Resource File Access Statistics iconViews 2692 iconDownload 1126
Abstract:
In order to meet the requirement of real time communication capability of certain Novell network, a real time network communication software IPXSR based on IPX protocol was developed. Firstly the principles of real time communication programming technology based on IPX protocol is analyzed. Then the...
Research on Coning Compensation Algorithms for SINS
WANG Yang-zhu, CUI Zhong-xing
2001, 27(3): 264-267.
Abstract References Relative Articles Resource File Access Statistics iconViews 2626 iconDownload 996
Abstract:
High speed and accuracy coning compensation algorithm plays an important role in strapdown inertial navigation system(SINS) in high dynamic environment. To reduce the effect of coning error, a deep research on design of coning compensation algorithm and character of coning compensation error is made...
Autonomous Position and Orientation Method for Space Mobile Robot
LIU Xin, ZHANG Chang-yun, SHEN Gong-zhang
2001, 27(3): 268-271.
Abstract References Relative Articles Resource File Access Statistics iconViews 3142 iconDownload 1207
Abstract:
Aiming at the space mobile robot employed in lunar exploration, the scheme of strapdown inertial navigation on tangent plane, the position and orientation method using computer vision are studied in this paper. Also a new inertial/computer vision integrated navigation system is proposed. Static and ...
Method of Error Compensation for Inertial Elements Based on Fuzzy Optimal Algorithm
ZHANG Fei-zhou, FAN Yue-zu, SUN Xian-fang
2001, 27(3): 272-275.
Abstract References Relative Articles Resource File Access Statistics iconViews 2578 iconDownload 1030
Abstract:
The method of error compensation for inertial elements in navigation system based on fuzzy optimal algorithm is presented. Its essential idea is combining genetic algorithm (GA) with fuzzy logic reasoning, preserving strong whole searching capability of GA and acting membership function as genetic i...
Measurement Quality and Performance Enhanced by the Pictorialized Measurement
HUANG Jun-qin
2001, 27(3): 276-279.
Abstract References Relative Articles Resource File Access Statistics iconViews 2761 iconDownload 804
Abstract:
The pictorialized measurement in the modern aircraft instruments is introduced in order to describe the enhancement of measurement quality and performance by the pictorialized measurements. The more deeper problems can be solved in more higher level describing the measurement results by using the pi...
Simulation about the Conditioning Circuit of Sensor
LI Nan, Lü Jun-fang, LI Yu-tao, YUAN Mei
2001, 27(3): 280-283.
Abstract References Relative Articles Resource File Access Statistics iconViews 3791 iconDownload 1663
Abstract:
In testing system, measuring small signals is necessary. The conditioning circuit is a crucial section, and its reliability has a great influence on the whole testing system. By using the method of computer simulation and thermal analysis, the functions of the circuit can be simulated and relevant p...
Fault Diagnosis of DC Motor Based on Parameter Estimation and Fuzzy ARTMAP
YANG Jing, LIU Xiang-qun, ZHANG Hong-yue
2001, 27(3): 284-288.
Abstract References Relative Articles Resource File Access Statistics iconViews 2637 iconDownload 952
Abstract:
In order to improve the motor quality and realize system monitor, a new approach to diagnose motor faults is presented to estimate the electromechanical parameters of motor based on the block-pulse function series and classify motor faults based on Fuzzy ARTMAP neural network. The electromechanical ...
Further Assessment of the NO x Emission from CAAC Fleet over China
HUANG Yong, WU Dong-ying, WANG Jin-tao, WU Shou-sheng
2001, 27(3): 289-292.
Abstract References Relative Articles Resource File Access Statistics iconViews 3490 iconDownload 1208
Abstract:
On the basis of CAAC timetable and route setting, and according to individual aeroplanes and aeroengines, the present paper simplified and modeled the operation of each flight. Moreover, using the popular fuel flow method and by means of the emission databanks published by ICAO and NASA,the inventor...
Research on Parameter Selection of Low RCS Serrated Pylon
HUANG Pei-lin, MA Dong-li, WU Zhe
2001, 27(3): 293-296.
Abstract References Relative Articles Resource File Access Statistics iconViews 2755 iconDownload 911
Abstract:
Wing and pylon form a structure which is the major lateral scattering sources of an ordinary aircraft because a dihedral angle of ninety degrees is formed. In order to implement a reduction of RCS without any other change on the aircraft, the outline of the pylon is changed by applying a serrated sc...
Effects of Rotor Downwash on Engine Jet
SU Yuan, WANG Ji-fei, CAO Yi-hua, CHEN Jiang-feng
2001, 27(3): 297-300.
Abstract References Relative Articles Resource File Access Statistics iconViews 3086 iconDownload 950
Abstract:
An analytical method to predict the effects of rotor downwash on engine jet was proposed to investigate the flow pattern of helicopter engine jet. First, free wake analysis was carried out to calculate the rotor wake geometry and the downwash around the engine jet space. Then engine jet path, cross ...
Object Oriented Finite Element Modeling Expert System
XU Yuan-ming, GONG Yao-nan
2001, 27(3): 301-304.
Abstract References Relative Articles Resource File Access Statistics iconViews 2619 iconDownload 1054
Abstract:
An Object Oriented Finite Element Modeling Expert System (OOFEMES), developed by combining the principle of object oriented programming and logical based reasoning is presented. The design and implementation of system function and structure are emphasized, which include the classification, organizat...
Quantitative Thermal Design of Heat Sinks in Large Space Simulators
JIANG Chuan-sheng, WANG Jun
2001, 27(3): 305-308.
Abstract References Relative Articles Resource File Access Statistics iconViews 3214 iconDownload 1174
Abstract:
The main factors influencing heat sink wall temperature distribution of large space simulators are analyzed. Fin-tube flow rate allocation of heat sinks with different structures are studied with heat sink dynamic simulation software HSDS. Simple and feasible improvements as for thermal design are m...
Study on Type and Sizing Tariff of Aircrew Oxygen Masks
WANG Xing-wei, YUAN Xiu-gan
2001, 27(3): 309-312.
Abstract References Relative Articles Resource File Access Statistics iconViews 2818 iconDownload 1290
Abstract:
In order to design high performance oxygen masks, the factors which affect the hermetization and comfort of mask are studied, and it is pointed out that sizing tariff is one of the most important factors. Human engineering principles of mask type and sizing tariff are discussed based on fighter pilo...
Investigation of Aerodynamic Characteristics of Vee Tail
KONG Fan-mei, QIU Dong
2001, 27(3): 313-316.
Abstract References Relative Articles Resource File Access Statistics iconViews 3240 iconDownload 2339
Abstract:
Experimental investigation of the aerodynamic design of the vee tail featuring low RCS has been carried out. The effects of the wing dihedral angles, and aileron positions on the aerodynamic characteristics of the complete aircraft with vee tail are studied. Aircraft models with two types of vee tai...
Vibrational Nonequilibrium Distribution of Diatomic Molecules
ZHANG Jin-bai, LI Chun-xuan
2001, 27(3): 317-320.
Abstract References Relative Articles Resource File Access Statistics iconViews 2845 iconDownload 921
Abstract:
An attempt is made in the present paper to develop an analytical model to modify the Hammerling-s hypothesis in dealing with the vibration modes for diatomic molecules under nonequilibrium states. The characteristics of distribution functions for vibration modes of diatomic molecules undergoing a ...
Calculation and Analysis of the Flow Passing through a Multi-Element Wing
WU Zong-cheng, ZHU Zi-qiang, LI Jin, CHEN Ze-min
2001, 27(3): 321-324.
Abstract References Relative Articles Resource File Access Statistics iconViews 3015 iconDownload 1549
Abstract:
The N-S equation is solved using a finite volume method with central difference scheme and a domain decomposition technique, an internal coupling condition satisfying the conservation of flux is used in the domain decomposition method. The complex flow field passing through a three-dimensional wing ...
New Strain Energy Functions of Blood Vessel (Ⅰ)
WANG Shou-mei, LI Ning, XU Ming
2001, 27(3): 325-327.
Abstract References Relative Articles Resource File Access Statistics iconViews 2861 iconDownload 951
Abstract:
Investigation of the consequence of large deformation of blood vessel due to change in transmural pressure is crucial to the understanding of vein graft or other surgical operations involving blood vessel. The paper proposes and verifies new constitutive laws describing nonlinear stress-strain relat...
New Strain Energy Functions of Blood Vessel (Ⅱ)
WANG Shou-mei, LI Ning, XU Ming
2001, 27(3): 328-331.
Abstract References Relative Articles Resource File Access Statistics iconViews 2723 iconDownload 903
Abstract:
The first part of this paper proposed and verified new constitutive laws describing nonlinear stress-strain relation of blood vessel. It can be used for large deformation calculation of blood vessels in the biomechanics regime. The correlation between the proposed formula and experimental data is ex...
Study of Bird Impact Loading Model
WU Cun-hao, YANG Jia-ling, ZANG Shu-guang, MA Juan-rong
2001, 27(3): 332-335.
Abstract References Relative Articles Resource File Access Statistics iconViews 2729 iconDownload 921
Abstract:
To study the bird impact problem, one key point is to establish the bird impact loading model. This paper, based on the full scale bird impact tests, and detailed analysis the results of high-speed photography, dynamic strain gauge, puts forward that triangle pulse simply model could be simplified b...
Delamination Growth of Composite Sandwich under Hygrothermal and Mechanical Loads
ZHANG Zhi-min, LI Xiang-yang
2001, 27(3): 336-339.
Abstract References Relative Articles Resource File Access Statistics iconViews 2829 iconDownload 930
Abstract:
The local buckling may occur in composite sandwich with delamination induced by impact damage. This often causes delamination growth and structure failure. The delamiantion growth is studied by using the variational method of moving boundary, and the formulas of energy release rate G along the delam...
Numerical Simulation Method of Sheet Metal Stamping Process
CHEN Zhong-kui, SHI Fa-zhong
2001, 27(3): 340-343.
Abstract References Relative Articles Resource File Access Statistics iconViews 2933 iconDownload 1228
Abstract:
Due to the large-deformation and large-strain, in addition to the three non-linearity (geometry, physics and contact) coupling with one another during the stamping process, the computational process is extraordinarily complicated. Based on the principle of virtual work, this paper deals with elastic...
Data Reduction Based on the Equivalence Class Partition of Attribute Set
ZHANG Xue-ming, SHI Fa-zhong
2001, 27(3): 344-347.
Abstract References Relative Articles Resource File Access Statistics iconViews 2940 iconDownload 1076
Abstract:
Duing to the high dimension and huge data of large database, data reduction plays more important roles in the knowledge discovery of database. Existing data reduction method for identify redundant and irrelevant attributes can be grouped into three type: enumeration search, heuristic search and rand...
Calculation of an Orthographic Projection with the Projection Theorem
ZHENG Guo-lei, ZHU Xin-xiong, XU De
2001, 27(3): 348-350.
Abstract References Relative Articles Resource File Access Statistics iconViews 5535 iconDownload 1044
Abstract:
This paper describes the process of proving the sole existence of an orthographic projection for a 3-dimentional geometry based on the projection theorem in the optimal theory, and proposes a new method of calculating the orthographically projective transformation of an object. It includes: ①An orth...
Integrated Reverse Engineering System for Complex Product
SUN Fu-hui, XI Ping, TANG Rong-xi
2001, 27(3): 351-355.
Abstract References Relative Articles Resource File Access Statistics iconViews 2609 iconDownload 1118
Abstract:
Reverse engineering, an important constituent part of CAD/CAM technology, is a main method in manufacturing complex product or product with main model. In this paper, the idea of integration and system is applied in reverse engineering, and a new concept, integrated reverse engineering system based ...
Research on Type Synthesis of Micromanipulation Mechanisms for Bioengineering
YU Jing-jun, BI Shu-sheng, ZONG Guang-hua, ZHAO Wei
2001, 27(3): 356-360.
Abstract References Relative Articles Resource File Access Statistics iconViews 2876 iconDownload 1278
Abstract:
Firstly aiming at the characteristic of micromanipulation, the guidelines for selecting and designing micromanipulation mechanisms for bioengineering are proposed. In order to solve the problem of type synthesis of 3 DOF translational parallel mechanism, all the possible types of parallel mechanisms...
Application of BP Multilayer Perceptron to R&D Project Termination Decisions
LIU Quan, GUAN Jian-cheng, XUE Jing-zhi
2001, 27(3): 361-364.
Abstract References Relative Articles Resource File Access Statistics iconViews 4261 iconDownload 965
Abstract:
The paper discusses the considerable importance to evaluate and terminate an ongoing R&D project. Furthermore, the feasibility of neural network to estimate and terminate an ongoing R&D project is explored. On the basis of the theory and methodology of neural network, this study attempts to ...
Strong Stability with Respect to Part of the Variablesin Systems with Impulse Effect
PENG Lin-ping
2001, 27(3): 365-368.
Abstract References Relative Articles Resource File Access Statistics iconViews 3042 iconDownload 800
Abstract:
The present paper introduces a new kind of stability——strong stability with respect to part of the variables in systems with impulse effect. The question on the stability is discussed. Effective sufficient conditions are found for strong stability with respect to partial variables of the zero soluti...
Chromosome Feature Extraction via Topographic Analysis
WANG Zhao-zhong, ZHOU Fu-gen, JIANG Zhi-guo
2001, 27(3): 369-372.
Abstract References Relative Articles Resource File Access Statistics iconViews 3063 iconDownload 999
Abstract:
Chromosome classification is very significant in the domain of medical image processing, and feature extraction is the key within this process. In this paper, the topographic analysis approach to extract chromosome features in gray-level image, which is operated by scale-space filter, is described. ...

Copyright © Journal of Beijing University of Aeronautics and Astronautics

Address: Editorial Department of Journal of Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing Post Code: 100191 Email: jbuaa@buaa.edu.cn

Supported by: Beijing Renhe Information Technology Co., Ltd.