Abstract:A jet stream injecting a supersonic external flow is a common technique for the f1ight control of an aerospace vehic1e. In this paper，MacCormack explicit scheme and Baldwin-Lomax algebraic turbulent model are employed to solve the 2D compressible RANS equations for the numerical simulation of the supersonic external flow Over a rearward facing step with transverse injection. The velocity vector field，pressure contour and Mach contour of the field are given. The step bottom pressure increases by about one time as compared with the case without injection.

Abstract:This paper develops a CAD system (Hcadx) for stiffened waffle cylinder，supported by CADKEY as graphics system. The CAD system can introduce user's operations by menu and can do buckling analysis of stiffened waffle cylinder by empirical formula or by analytic method. It can also obtain optimal parameters by penalty function algorithm and may invoke CADKEY to plot design drawings of stiffened waffle cylinder automatically. It is not necessary to exit Hcadx. These design drawings can be edited easily to become acceptable work drawings.

Abstract:In this paper a flange-multistringer panel subjected to concentrated force is simplified into a model of a flange-stringer panel. The optimum design method is set up by using the finite element method in strength analysis of the flange，and using the mathematical programming method in structural synthesis. The results of numerical examples by this method indicate that the weight of the structure decreases by 19.2% as compared with present design method under the same load.

Abstract:A general solution for solving elastic bending problem of simply supported rectangular shallow shells is established in this paper. For example，the symmetric deformation for a simply supported rectangular shallow shell loaded uniformly with the displacement along the four edges being zero，is solved.

Abstract:In this paper，a re1iable and effective method for calculating the dynamic characteristics of fluid-filled cylindrical tanks is developed. And the effect of the coupling between liquid sloshing and shell vibration is considered. The liquid is assumed to follow the velocity potential theory，and the shell is modeled by the finite element method. In this approach，the number of unknowns is substantially less than those in analyses where both tank wall and liouid are subdivided into finite elements.

Abstract:The numerical method is used for calculating the effects of slip boundary conditions on the viscous flows over blunt bodies at different altitude The nonequilibrium viscous shock-layer equations are used as the governing equations，the boundary conditions include shock-slip，wall-slip and no slip conditions. The numerical results show that the shock stand-off distance is thicker as slip boundary conditions are considered，and the value of electron number density behind the bow shock is not zero. The numerical resu1ts are pesented and compared with those from other methods.

Abstract:In this paper，the spline finite point method is presented for the geometrically nonlinear dynamic response of beams and plates based on Berger hypothesis. The essential equations in the sp1ine finite point method are deduced and the incremental equations are solved by means of wilson-θ method. The results show that the method in this paper can save computation time and make program simpler. As compared with the finit element method，It can be easily carried out on personal computers.

Abstract:The general expression for the stability of straight elastic compressed bars with constant cross section is derived in this paper.Seventeen equations for calculating the critical load of elastic compressed bars under various supporting conditions are all its special cases.

Abstract:The range angle and the flying time for the passive section are calculated by using the quality with a constant vector in the direction of the major axis of the elliptical orbit in this paper.

Abstract:A completely state-space formula for the H^∞ suboptimal solutions of linear systems is given. A general non-square 4-block model matching problem is produced from a normal control system. And the solution for this 4-block problem is received. This method is conveniently applied in computer-aided design，and is also convenient in further synthsis and analysis of the systems.

Abstract:This paper is based on state space model of the system. For the situation of the system completing disturbance decoupling by using dynamic output feedback，the condition of robust disturbance decoupling is given.

Abstract:Starting from the task and the demand of robot force-feedback compliance control，the author investigates several main problems in the design of computer system for robot control，including general system architecture，memory structure，interconnection network structure，interrupt system structure，concurrent and real-time operating system, processors selection，multiprocessor system debugging and so on. Some design principles and structure projects selectable are presented in the paper.

Abstract:The developing of artificial neural networks is based On the research of modern neural science. Artificial neural networks reflect the basic feature of human brain's function，but it is not a real description of human neural networks，it is just some abstract，simulation and simplification of human neural networks. The fundamental goal to study this technique is to explore the mechanism of which human brain processes，memorizes and searches information，and the possibi1ity of using the principle to artificial intelligence. This paper introduces some neural networks' models and their applications.

Abstract:The transputer is a new single chip computer developed by INMOS corporation in recent years. It has been widely used for its high-performance，f1exibility and low price. In this paper，the solutions for simulation of an aeroplane's flight with six degrees of freedoom on various computers，such as transputer，YH-Fl，YH-l and etc.，are listed. The results show that the transputer multiprocessor systems are of high cost-performance，one order of magnitude higher than a mainframe computer.

Abstract:This paper introduces the function and design principles of a computer-aided instruction system which can be used to aid a student's learning and examination about the continuous systems modeling. The methods for system dynamics model knowledge representation and modeling behavior validity measure are discussed in detail.

Abstract:This paper describes the realization of GASP4 on a microcomputer IBM-PC，the form of GASP/PC simulation language，the organizational structure and simulation method of the GASP/PC simulation language for discrete，continuous and combined simulation models.

Abstract:This paper describes a sequential PROLOG inference processor: KD-PP which is based on compilation techniques. The processor has incorporated hardware mechanisms in it for logic programming language PROLOG execution. So it can execute PROLOG programs at high speed. The architecture of the processor，including data format，memory，machine states，instruction set，and the hardware implementing techniques are described in detal.