Abstract:The functions on boundary are expanded into wavelet series，and the coefficient matrices are obtained from the values of kernal functions on the boundary using a circulant matrix method. The approximate solution of boundary integral equation is worked out by solving the unknown wavelet coefficients. An example of 2D Laplace equation is given.

Abstract:A fuzzy direction neural network classifier used for fault detection and isolation (FDI) in a liquid propellant rocket engine is proposed. The fuzzy direction neural network utilizes fuzzy sets as engine fault classes. Each fuzzy set is an aggregate of fuzzy direction bodies. A fuzzy direction body is described by a direction vector，an included angle and two radii. The fuzzy direction neural network can learn nonlinear direction boundaries in a single pass through the training data. The FDI simulation research has shown the strong discernibility of the fuzzy direction neural network.

Abstract:The physical model and calculation motheds for the stratified two-phase flow in a horizontal condensation tube are investigated in this paper. The action of gravity and the effect of mass transfer on the interfacial shear are considered in this model.The program were used to calculate the flow and heat transfer characteristics of NH₃-Al horizontal condensation tube and to give the axial profiles of parameters. The effects of flow rates and cooling conditions on this profiles were examined.

Abstract:The fault that the picture resolution of digital image system is much worse than film greatly limits the application of digital image processing techniques in mesurements. Subpixel techniques can mend this fault. In this paper，we introduce the common subpixel techniques and use them in grid mesurement. A new filter-the line search algorism is given to process the strongly curved grid line and the subpixel result-suare obtained.

Abstract:This paper uses direct Monte Carlo simulation method to predict the process of gaseous chemical reaction. The paper studies the dissociation reaction of gaseous molecules, discusses the reliability of extrapolating chemical reaction rate from lower-temperature region to higher-temperature region through Arrhenius empirical relation-ship obtained by experiments under lower-temperature condition, analyses the effects of thermal nonequilibrium on chemical reaction rate，and presents the relation between chemical reaction rate and gas temperature obtained through direct Monte Carlo simulation method.

Abstract:A feedback multi-layer neural network model is proposed for the structural analysis. The weight coefficients of middle-layer neural cells of the stiffness matrix given by finite element method using an exact integrated 4 node element. Numerical simulation shows that the method is consistent with FEM. This method presents a new way for the parallel structural analysis.

Abstract:According to the classical control theory，this paper deals with two designs of critical statically unstable attitude control system.

Abstract:The purpose of this paper is to solve the problem of designing optimized trajectory, based on the task that the prober is launched from the anchorage orbit and lands on the moon. This paper emphasizingly discusses the design of automatical optimizing trajectory calculation of lunar prober. Finallly, simulation results show good standard trajectory.

Abstract:In this paper，braking scheme and orbital optimization are discussed, assuming that the lunar detector approaches the moon vertically.

Abstract:This paper mainly treats the order ratio spectrum analysis（ORSA) and its application to the realtime fault diagnosis of the car-starters. First，it elaborates the principle of the ORSA and the way of generating and the method of being restrained to the aliasing and leakage in the process of order ratio sampling. Then the paper discusses how to acquire the interested noise signals in the short working process of the car-starters with the rapid acceleration，and how to extract the information of their fault features from the signals in accordance with the ORSA. Finally it diagnoses realtimely the faults of the car-starters by means of threshold judgement.

Abstract:This paper presents a tool wear monitoring method based on feature fusion via neural networks. The basic principle of this method，feature association，feature extraction，data normalization and neural networks construction of the method are discussed. The experimintal results show that the proposed method for tool wear monitoring is reliable and effective.

Abstract:This paper presents the methods of measuring interior temperature，radiant temperature and radiant heat flux of liquid propellant explosion fire balls and the computer data acquisition system of their experimental measurment in detail. Some measuring results of the heat transfer parameters of 50kg、100kg and 300kg liquid propellant (N₂O₄/UDMH) explosion fire balls are given.

Abstract:The control properties of vortex valve for mass flow rate are numerically simulated. The time-dependent method is used to solve full Navier-Storkes governing equations. The calculation is made with the control mass added or not. The steady nozzle flowfield with vortex chamber is obtained and the nozzle mass flow rate is related with control mass flow rate. The results indicate that the vortex valve has good property for controlling nozzle mass flow rate.

Abstract:In this paper，a new method of recognizing one-dimensional range profiles of high resolution radar targets is proposed. The algorithms of image processing are used in this method. First，we code one-dimensional range, profiles, then，use Fourier transformation to extract a series of formal features which can be recognized by neural networks. The experimental results show that，in some aspect angle interval, the recognition is good.

Abstract:In the paper，a novel method of nonlinear analysis—Decomposition method is introduced. Depending on Mathematical Mechanization，it is used to analyze the second-order Phase-locked loops (PLL) with imperfect integrator，and the approximate analytic solution of phase error and frequency error are worked out. The stability is analyzed and the steady-state phase error、frequency error and pull-in time are obtained.

Abstract:The paper discusses the capacity of the single observer in a T/R--R type bistatic system without elevation message to locate and track moving targets in three dimensional space. The 3-D location and tracking of moving targets is well achieved by means of the combination of measurement data got at several observation points. Therefore the height message of targets can be extracted from variant measurement values of the difference of distance sum. The feasibility of this way is proved in the paper with the help of simulation.

Abstract:This paper discusses the implementation of I²C serial communication between 51 series microprocessor without I²C hardware interface and EEPROM 24C01A by software.

Abstract:A method of integer division using floating-point division is introduced in this paper. The possible error produced by this method is estimated and the revising method is given. an implementing example is described and the method is finally evaluated.

Abstract:Based on the Logic of context，CL，defined in [l]，circumscription and default theory are introduced into context reasoning，its related definitions and theorems are a1so provided.

Abstract:Based on the analysis of traditional implementation of network function and its overhead. some consideraton of high performance network controller is given. The hardware approaches of promoting network performance are described. And finally，FDDI features-orientied network controller design technology is also presented.

Abstract:A programming approach by means of simulated evolution is investigated. A program evolver which uses a formal grammar as its genetic representaion is constructed and the corresponding algorithms in the evolver are presented. Finally，the evolver is applied to the artificial ant problem.

Abstract:In this paper, according to the needs of formation damage protection for oil and gas. based on distributed Client/Server computer model，a distributed intelligent application system (DIAS) has been developed. In this system，data and knowledge can be shared. This system has yielded benefits to our country.

Abstract:This paper presents the synchronous relation between YFRIO language and YFSIM language，expounds their synchronous hardware and software mechanisms and the way of programing.

Abstract:In this paper，an object-oriented model is presented for system fault diagnosis. We discuss the structure of the model，the strategy and algorithm based on the model.

Abstract:This article proposes the logic data model of object-oriented geographic database. The topologic relationships between the elementary graphic object are analyzed in detail, and the editing operations to be performed on them are identified and analyzed. These editing operations ensure that topologic consistency in the database is preserved.

Abstract:This paper discusses the detecting problem of the fall point of vehicle with prior information. This proposed method may be used under the circumstance of only one flight test. In the paper，the detecting scheme is discussed, and the risk function is calculated. In the meantime，the fiducial analysis is introduced. Finally,the consistent test of prior sample and fal1 point of one flight test are studied.

Abstract:This paper deals with the estimation of the errors of the exact solution and the Legendre spectral solution. By using the defined elliptic projection operator，we can form the estimations of the errors. Both H and H¹ norm estimations are obtained simultaneously.

Abstract:In this paper，a genetic classifier system for complex system analysis is proposed. The system not only makes use of the remarkable genetic algorithms searching ability and the ability to find laws from a great amount of historical data to acquire classifiers，but also posseses the following two charateristics: ①It is suitable for such complex systems which have noise and lack complete description ②The credit of each classifcer acquired by this system is identical to statistical results，so it can support meta synthesis reasoning method.

Abstract:It is very important to select a truncating point in the truncated sequential posterior odd test (SPOT), but there is no efficient method to solve the problem up to now. In the paper, the authors apply the optimization techniques to determine the truncating point. Having avoided selecting C = 1,this method can overcome the difficulties in selecting the stop time N and truncating point C, and make the selection of C more theoretically. The optimal truncating point minimizes the risks undertaken by both sides become and makes them more acceptable.

Abstract:The theory of inclusion is introduced in this paper. Two meso-mechanical expressions for the constitutive relations and effective elastic moduli of anisotropic media which include distributed inclusions are derived by self-consistent method. The effective elastic moduli of materials which may include defects or damage can be obtained by the expressions. The theoretical and effective elastic moduli of anisotropic media such as fiber composites are also obtained，thus a relationship between the meso-structures and macro-properties of materials are established by the expressions.

Abstract:This paper first summarizes FMS reliability modelling and analysis. Then aimed at the main problem in the study of FMS reliability in China, the research direction for FMS multi-mission reliability modelling and analysis is pointed out.