Abstract:Adopting the models of chemical non-equilibrium and radiant nonequilib-rium，according to simplified or full Naver-Stokes equation，We numerically simulates whole target flow field and electronic-radiant characteristic of small blunted cone having ablative material injection with the purpose of providing the aero-physics data for protective design. The simulative results of flow field are compared with experimental data and good agreements are found. The numerical results show that the wall ablative material injection and the wall catalytic characteristic are considered，and have orders influence to electronic number density.

Abstract:In this paper, an experimental investigation on spray characteristics of coaxial swirling injector was performed using the laser-scattering system (Malvern) and the self-designed atomization and sprays test facility. It was analyzed and discussed that the effect of gas injecting pressure differential on the spray mass median diameter (MMD) and spray diameter size distribution exponent (n). The study results should provide theoretic guidance in on going gas-liquid coaxial swirling injector design.

Abstract:The governing equations are the compressible full Navier-stokes equations. Maccormack's time-dependent explicit scheme is used to solve axisynmetric internal flowfield of the solid propellant rocket motor. A turbulent model based on the Bald-win-lomax algebraic scheme is employed to get the coefficient of turbulent viscosity. The solution of the internal flowfield for the soliel rocket motor with tube grain is obtained. The results are satisfactory. The methods are of reference value to the engineering design of SRM.

Abstract:A simple artificial intelligence system for fault diagnosis established in this paper. The system consists of knowledge base，fuzzy reasoning module，neural network module and control module. The fault pre-diagnosis is completed in the fuzzy reasoning module by use of fuzzy synthetic judgement method. The identification of the fault types is achieved in the neural network module using competitive learning algorithm. The seven models for the single and composite. faults of a cantilever beam have been investigated. The results are satisfactory.

Abstract:Using multilevel control method. we studied the coupling active control of the large flexible structures in this article. Taking the dynamic variables of structure as the system states directly, the feedback gains of this vibration system have been developed. According to the theory presented in this article, one space station model has been taken as an illustrated example. The computer simulation has been carried out and the satisfactory results have been gotten. Theoretical and numerical results show that the method presented in this article is of many special advantages to the vibration system of large flexible structures.

Abstract:This paper has given magneto-hydrodynamic energy integration relationship at the condition of biadiabatical approximaticn. Analysis shows that magneto-hydrodynamic system of this kind is conservative. It is feasible to adopt kinetic equations or method of energy principle to analyze the systematic stability. This paper has discussed the basic principle of linear stability proceed from governing equations，and has showed that increment of longitudnal pressure is benifit to systematic stability.

Abstract:Large attitude manoeuvring the amplitude of which ranges from 0°to 180°it is necessary to carried out. The pitch channel can be used in the process of manoeuvre，and the other two are required for attitude stabilization，because all three channels are interreactive in attitude motion generally. In this paper a phase-plan on-off curve and corresponding attitude control law are designed and used in both attitude maneouvre and attitude stabilization. The resu1ts of mathematical simulation shows that the accuracies of attitude control meet the design requirement as long as the parameters of attitude control curve are rationally chosen.

Abstract:According to the classical control theory, this paper introduces attitude angle acceleration feedback. Using the methods of the zero and pole points cancellation, ete ., we designed reentry warhead roll channel control system with fast response speed stability and strong robustness.

Abstract:This paper mainly discusses the procedure of applying paramctric differentiation to extract resistance coefficients. The computer simulation results are presented. This method has been actually applied in shooting range.

Abstract:This paper dea1s with the effect of rare earth e1ements in Chromvanadizing processes. The resu1ts show that rare earth e1ements can efficiently improve the structures of the Chromvanadizing 1ayer，the rate of growth and properties of diffusion 1ayer. The Cata1ytic mechanism of rare earth elements is a1so discussed.

Abstract:The requirement of the time-effect of vibro-acoustics for the distribution of the dynamic stress and the structural characteristics of the pressure vessel are first explored. By analyzing its modal parameters and dynamic stress，a new method of sound excitation is given for eliminating the welding residual stress to achieve the time-effect. It is proved successful in practice.

Abstract:In this paper，some recent development in submunition and dispenser is summarized. Its characteristics and the trend of the development are presented. Further-more，some key technique is preliminarily discussed.

Abstract:A new technique of 8mm-band electrical scanning-tracking antenna with small power is discussed. It completes electrical scanned beam in high speed，by four PIN diods installed in two layers dual-ridge rectangular waveguides，The difficulfies of technique and the method of solving it are studied. Experimental results show that properties are safisfactory. This technique can also be used in other microwave bands.

Abstract:This paper introduces an super high speed digital signal processing system designed by us with AD9048 video flash ADC，TMC2310 vector signal processor and TMS320C25 microprocessor. The hardware architecture and the flow diagram of signal processing algorithms are presented in detail.

Abstract:It is difficult to study the detection performance of a large scale serial distributed detection networks，The paper gives a simple analytical method to probe this problem under some conditions，To a great extent，this enables us to know how the detection performance varies when the networks becomes larger.

Abstract:TLI is a programming interface to the transport layer of ISO-OSI model，it supports the transfer of data between two user processes in network. TLI provides two modes of service for application and development；connection mode and connectionless mode. The former is appropriate for applications that requires relatively long-lived，datastream-oriented interactions; the latter is appropriate for application that involves short-term request/response interactions. In this paper，the auther discussed connetionless mode service of TLI and several problems that must be solved.

Abstract:In this paper π-calculus is extended in order to support asynchronous communication，then the calculus semantics of a simple Actor language is given. This calculus semantics can express asynchronous communication，the actor's behaviour replacement and some important object-oriented features such as object，class，encapsulation，instance variable，temporary variable etc.

Abstract:MPP Fortran is a data parallel programming language released by Cray Research，Incorporated. This paper introduces at first the major features of MPP Fortran. Then based on that，it analyses and discusses the main content as well as the key technique of automatic program parallelization for MPP systems.

Abstract:Several commonly used fault tolerance methods for nodes in shared-nothing parallel database systems (SN-PDB) are presented in the paper. The chained declustering method is focused，and the load balancing algorithm of it is given in the paper.

Abstract:In this paper，we discuss the theft problem in continuous time. J_tis the theft number of [0,t] and {J_t}_t≥0 is a Poisson process. Profit process and risk process are all i. i. d time series. We find optimal stopping rules by using the weak infinitesimal generator of markov process.

Abstract:In this paper，we obtain the tanget vector at each point of the regular rational Bé zier curve of degree n by using the improved rational de Casteljau algorithm. Then we can get the unit normal vector at each point of the original curve. So we have ingeniously overcome the difficulty that the unit normal vector is not easily to be solved at each point. This method has obvious geometric meaning. The algorithm is simple and the result is satisfactory in practice.

Abstract:In this paper，fuzziness that exists in the MADM and synthetic evaluation problems is discussed，and the ordering method of fuzzy number and its linear operation laws are introduced. Based on the ordering of fuzzy number，the author presented new models for MADM and synthetic evaluation，which can take the fuzziness into consideration.

Abstract:Let f be a K-quasiconformal mapping which maps D?Rⁿ onto bounded M-QED domain D′? R"，0<α≤(KM)^1/1-n. In this paper，the authors proved that f ∈Lip_a (?D) if and only if f ∈Lip_α (D).

Abstract:A chiral structrure for the fullerene D₂-C₈₄ is proposed. The conclusion explains why the formed ratio of D₂- to D_2d-C₈₄ in the experiment is 2:1. The structure and symmetry and stability of fullerene isomer is discussed.

Abstract:In the Monte Carlo Calculation，we simulate the neutron tracks or histories by means of the random nature of the neutron interactions with the medium of shield which is a shell of the sphere made of Iron，and neutrons are produced by the T（d ，n)⁴ He reaction with 300 keV deuteron beam energy. By the explanations and analyses of results based on the Monte Carlo Calculation, we obtain the optimal thickness of shield, which slows down neutrons from 14 MeV to 1.0 MeV. The calculated results agree with those of the same kind shields of foreign countries, and have certain value of reference in applied field.

Abstract:The density of solids under zero temperature and zero pressure is an important physical parameter. In this paper a simple method of estimating the density under zero temperature and zero pressure is presented by using the Debye theory，and the densities under zero temperature and zero pressure of 82 materials are calculated.