Abstract:From the Lighthill's exact solution for the incompressible inverse problem it is known that in the inverse design problem，the surface pressure distribution and the free stream speed can not be both prescribed independently. This suggests the existence of a constraint (regularity condition)on the pressure distribution. The same constraint exists at compressible speeds. In this paper，a well-posed inverse design method for transonic airfoil is presented. In the method，the target pressure distribution contains a free prameter that can be adjusted during the computation to satisfy the regularity condition derived in this paper.

Abstract:This paper rewiews four formulations of viscoelastic Poisson's ratio，which are the formulation by differential operators，the formulation by hereditary integral and by complex and empirical methods. Also discused are the domain ralidty and problems of these methods，which provide convenient description of mechanical behaviors of solid rocket propellants.

Abstract:In this paper, the perturbation technique is introduced into the method of harmonic balance. A new method used for analysing nonlinear free vibration of multidegree-offreedom systems and structures is obtained. The form of solution is expanded into a series of Small parameters and harmonics, so no term will be lost in the solution and the algebric equations are linear. With the linear transformations，the matrices of the equations become diagonal. As soon as the modes related to linear vibration are found，the solution can be obtained. This method is superior to the method of linearized iteration. The examples show that the method has high accuracy for small amplitude problems and the results for rather large amplitude are satisfactory.

Abstract:The ZN-3 sounding rocket is an important instrument used for the sounding of space science. Because of its few using quantity and the expensive scientific instrument it carries, not only high reliability is required, but also the advanced performance and econo mization are demanded. How to accurately deal with the relationship among these factors in technical design is very important. In this paper，through analyses and discussions of correctly dealing with the technical problems，snchas the determinants of stage number，formulatiog optimum program of thrust，reliability of construct and evaluation of fests etc. The methods unifying the general reliability，advancity and econom zation of the rocket are reached.

Abstract:In this paper，the spline finite point methods is proposed to solve the problem of geometric nonlinear dynamic response of plates. Taking the form of the product of the cubic spline function and the mode shape function of beam，as trial function and starting from virtual displacement principle，the exact and explicit expression of nonlinear stiffness matrix is derived and the dynamic incremental equations are solved by means of wilson-θ method. The computational examples are given in this paper. Compared to the achievements known，the method in it has following advantages: it leads to smaller amount of computational work，and 1t has higher accuracy. So the spline finite point method is more effective in analyring nonlinear dynamic response of plates.

Abstract:The development of a controllable parafoil system provides the prospects for precise，undamagea recovery of large delicate payloads and recovery return systems intended for reuse. In this paper a six-degree-of-freedom flight dynamics model for such a system is presented and the simulation program is developed to aid the study of system performance such as glide and dynamic stability etc. As an example，the glide and dynamic stability performance of 40 (sqm) are a parafoil system has been discussed and some satisfactory results were obtained.

Abstract:An object-oriented Prolog interpreter GKD-POS/SUN is designed and implemented based on a modular prolog system. Some concepts such as module，communication between modules，exchanging，class，method，inheritance，message sending and receiving are introduced in and directly supported by the interpreter. This paper describes the syntax，system organization and architecture，main implementing techniques and related object operation primitives of GKD-POS/SUN.

Abstract:The requirements to system program under multiprocessor environment are presented. The Problems encountered in developing system program parallelization are presented and their solutions are discussed. Three methods for implementing the mutual exclusion of critical section and their performance evaluation are given in it.

Abstract:The ITM (Intelligence Too1 Machine) system includes a host computer (VAX) and a slave processor (ITM). This paper describes the design method of a communication subsystem，which transmits the information between two computers and contro1s ITM，and the techniques of imp1ementing and debugging (out-1ine) the communication subsystem in VAX/VMS environment is a1so described.

Abstract:The specification and structural design of a courseware authoring system，AutoCAI，have been discussed according to“Courseware Engineering”. The development phases and design strategy of the system have also been presented.

Abstract:For a given sequence of monotonic data，a shape preserving quadric interpolation spline function that is simple to construct and easy to calculate is described in this paper. The error estimates for the interpolation spline functions are given and the approximate precision is O(h²).

Abstract:In this paper we put forward a method of generating set-valued measures by using vector measures and probahility measures and then develop the resules in[1]，and obtain the necessary and sufficent conditions of the closed convex set-valued measures generated by equal ratio rector measures.

Abstract:本文将单位圆上有界复值解析函数的 Julia-wolff 引理推广到算子值解析函数。

Abstract:Using the modified transport approximation，the authors calculated and obtained 18-group neutron constants. In this paper，the authors try to examine the validity of these 18-group neutron constants by calculating the Tritium production rate of fast neutron in LID spheres. The modified transport approximation equation and its matched 18-group neutron constants are used to calculate the Tritium production rate of fast neutrons in two different models. The results are in good agreement with those obtaind by other authors using different transport equation and group constants，the relative errors are within 3%. The calculatied results and the comparison show that the modified transport approximation equation and its matched 18-group neutron constants can be used to describe the transport behavior of fast neutrons in light material，and the 18-group neutron constants obtained by the authors are reliable and rational.

Abstract:We report in this paper the first principle calculation of elastic constants of metal aluminium using a model of cluster Al₁₃ with face-centered-cubic structure. Total energies of Al₁₃ are first calculated at various lattice spacings using the M_s-X_a method，after that total energies are fitted using morse potential function，the porameters of which are finally used to calculate the elastic constants of aluminium.The results are: C₁₁=8.83×l0¹¹ dyn/cm² and C₁₂=6.73×10¹¹dyn/cm²，which are in good agreement with ather theories and experiment.

Abstract:In this paper，a general mathematic model of profile error of complex surfaces is proposed with the least squares evaluation. The profile errors of all kinds of surfaces can be evaluated on the basis of this model. This model is very convenient for computer processing，it can be directly applied in the productive procession. Finally，we deal with error separation and control strategies for quality assurance.

Abstract:The present situation and trends of monitoring technology development are summarized in the paper. The FMS/FMC condition monitoring and fault diagnosis system. CMFDS，is designed and developed. The system composition，function，equipment，hardware/software structure，general strategies and technical features are given. The experiments in the machining-center and FMS indicates that the system is of good generality and succinctlness. The system designed represents the integrated and intelligence trend of monitoring and diagnosis technology development.

Abstract:In this paper，a contour surface equation has been developed for the cylindrical cam with oscillatig roller follower by utillizing enveloping theorm of differential geometry. Based on it，some essential problems，such as the condition of cylindrical cam's undercutting，the contact zone and actual contact curves between the roller and cam，etc.，have been discussed in detail，and the formula of perssure angle as well as the minimum contact height of rollers has been derived too. All of these make the analytical design method for the cam more perfect.

Abstract:The structure and properties of powder RE-boronizing Layer are studied and compared with boronizing layer，It follows that RE-boronizing layer possesses higher wear-resistance, lower brittleness and finer stucture. It also shows that RE-atoms can be absorbed by the surface of steel, and migrate to the depth of 800μ with the aid of advanced analyzing methods. Besides, the mechanism of RE-boronizing and the effects of RE.

Abstract:By using polycarbosilane as precursor and SiC whisker，SiC powder or carbon fiber as reinforcer，the SiC/SiC or C/SiC composite was fabricated. The influences of the properties of mechanics and thermal physics were investigated. The results showed that at 1300℃ polycarbosilane was transformed into β-SiC mic-crystal which linked the reinforcer to form the SiC/SiC or C/SiC composite. The composite has good mechanical properties at both room temperature and high temperature，excellent thermal shock resistance and thermal fatigur resistance，and good oxidation resistance at 1300℃ in air.