Abstract:This paper presents a new optimization object in optical design. It is the sum of the weighted areas of lateral aberration curves of the meridianal rays in different fields. In the paper its theoretical basis and practical properties are analysed，and there is an example.

Abstract:In this artic1e，multiple independently targeting is reduced to a problem of one-dimensional explicit guidance and then problem of making attacks on ground-targets are discussed. Our discursion is divided into two parts. The first part is concerning the reduction to problem of one-dimensional guidance. The earth is taken as a symmetrical spinning globe of spherical shape and problems on form of optimal guidonce taw of Mayer realtime guidance，implementation of guidance and power cut-off are discussed. In the second part，combining explicit guidance with impulsive discharging of sub-warhead for attacking multiple targets distributed around the point of impact of the loaded missile is discussed and relevant formulos for computation are derived. Omnibearing independent guidance is brief1y mentioned as a speciaI case of explicit guidance of sub-warheads.

Abstract:In this paper，on the basis of studying into optimal thrust-direction program，the minimun principle is used to derive approximate analytic solution of the velocity increments of independently targeted warhead. Independently targeting graphs and velocity increment polar plots are proposed to be applied for selecting independently targeting program，including the choicing optimal thrust direction angles，determination of required velocity increment and fuel comsumption together with the selection of optimal sequence of hitting multiple targets chosen and so forth. Computed data are provided for illustration of purpose. Method of analysis used is applicable to arbitrary distributed multiple targets within a certain range of distribution and convenient for primary engineering design and the analysis of the process of independent targeting. The results obtained can be used as a guidance for digital simulation.

Abstract:In this paper，effect of deflection of vertical on ballistic missile impact accuracy is discussed. By analysing the effect of deflection of vertical in the powered steps of flight the perturbations of the cut-off condition are obtained. On analysing the miss coefficient we arrived at the concIusion that it is necessary to use the cut-off parameters taking in account the earths rotation for computing the miss coefficients. Analytical formulas for obtaining the cut-off parameters taking in account the earth's rotation from those without taking earth's rotation into account are derived. These formulas used to compute the cut-off parameters under any lauch conditions without the integration of the system of differential equations. The cut-off parameters thus obtained can be used to compute the miss coefficients. In comparison with the results obtained by direct integration of trajectory equations the method described in this paper gives a relation error on miss distance of less than 2% and an absolute error of about 30 meters. Finally，this paper puts formulas for computing the miss distance due to def1ection of the vertical and methods for correcting the miss distance of inertial guidance are briefly discussed.

Abstract:The digital simulation method on basis of e^AT presented in this paper consists in treating oarious continuous，1inear，constant parts of the system simulated as subsystems which are desoribed by systems of discrete state equations. Then，these subsystems and various non-linear or time-varying parts are interconnected and thus digital simulation of the whole system is implemented. This method of simulation possesses the merits of fast computing rate，high accuracy and versatilety. The main point described in this paper is concerning the computation of the coefficient matrixes of the subsystems using analytir method which has the merit in the amount of computation and accuracy of simulation independent of the step size chosen with the (somewhat laboursome) program.

Abstract:Spline function is available to the numerical computation on the digital computer for its ease to process. Spline function has been utilized in all of the engineering territories. In the discrete digital processing of the continuous images，there are very large amount of image data. If we use the spline function to interpolate and smooth the data set，we would got advantages in computation time reduction. In this paper，we try to discuss an efficient image data compressing method using sp1ine function for least hardware implementations; and a restoration procedure to smooth out the random noise distorted image with the spline functions.

Abstract:Utilizing the recursive equation of estimation of the constant gain α-β filter，the upper limit of the output estimation error is derived for coarse quantized input data. Numerical results of the upper limit of output estimation error for three different regions in the stable triangle of α-β filter are evaluated. Although the detail values of upper limit in respect to the three different regions are slightly different，numerical results express that the upper limit values of output estimation error are in the range of (0.5q～0.75q). Obviously，the computed upper limit values of output estimation error are always larger than the instantaneous values of output error; but the concept of this upper limit is useful for error analysis when input quantization error can not be treated as a white noise with uniform distribution.

Abstract:On the basis of Fuzzy Sets theory，the similarity between source coding and channel coding was discussed in this paper. And then four concepts can be suggested. Finally，the data compression principal by syndrome method and the results of computer simulation are presented.

Abstract:The static pressure regain blast pipe equalizing static pressure is applied widely in engineering. However，so far it lacks a more perfect mathematical mode1. Using basic knowledge of Fluid Dynamics，this paper estah1ishes mathematical model of basal geometry of blast pipe equalizing static pressure based on the pressure regain principle. Therefor basal theoretical curve is obtained，and cardinal physical and geometric parameters which effect geometric form of the curve. The theoretical guide for engineering design is provided. Also from practice，this paper analysed advantages of using static pressure regain blast pipe equalizing static pressure in blowout Wind system of large and high speed electronic computer and volue of engineering application，and main questions.

Abstract:This report mainly discusses design problems of the interface for computer communication on the basis of the engineering task which needs to link the microcomputer Z80 and FACOM-230/38 remotely. The Fujitsu's BSC protocol is used. In this paper，the aspects in design of communication interface are discussed and some functions of the protocol are discussed，the formulas evaluating optimum length of the message block are deduced from effective line throughput，optimum division of the message block，usage of memory and so on. Finally，characteristics of the BSC protocol is analysed for communieation programming，the protocol is reali1ed by software and some communication program flow charts are presented.