Abstract:Further analysis and researches in the curved microstrip line antennas given by C.Wood are made. A theoretical model of semicicular spiral microstrip antenna is presented. Based on the model，the parameters calculation and the shape optimization are carried out，and the theoretical result is found to be in reasonable agreement with the experiment.

Abstract:For the system of adaptive signal processing，the practical application of an algorithm is often limited by its convergence. Thus，it is necessary for a complete algorithm to involve the convergence analysis. In this paper，using the theory of nonliner numerical analysis，the convergence condition is derived for a new algorithm，the Weighted Covariance Estimation (WCE), developed by D.F.Delong^[1] in 1979. Thereof，it is proved theoretically that the convergence of the WCE algorithm is independent of the choice of initial value. This conclusion is verified by the authors from the numerical results obtained through the investigation of computer simulation.

Abstract:The parallel computer programs to solve time-dependent two dimensional neutron transport problem were drawn up, and many test calculations were completed by using the YH-l type electronic computer. The calculations for the six critical assemblies show that the discrepany between the calculation value and the experimental result of the critical parameter is less than the experimental error of the data. This proves that the computer programs are effective. The validity of the programs is also verified by the fact that al1 calculation results of the different parallel algorithm are identical. The，calculations show that the efficiency of the parallel computing is roughly thirtyfold of that of the serial program when the data are the same. To enhance the efficiency of the parallel computing, we developed a combining dimension technique and an oblique diagonal sweep method in addition to using the general parallel technique.

Abstract:The thesis discusses how to reappear the following traditional techniques in optical design through the computer and how to use them conveniently in optical automatic design. scaling focal length，exchange of powers，changes of curvatures of lens，separate design，1isting tables of aberration variations， etc. It expownds the gists of the programs， and lists the pragmatic programs.

Abstract:The experimental results of adopting the Chinese rare-earth element Ytterbium as the dynamic pressure transducer are given in this paper. The experiment was done on an electric gun (40kJ) in our laboratory and by using the explosive loading device independently. Initial comparision has been made with those data derived from the manganin piezoresistive and carbon piezoresistive transducers in corresponding devices. The results show that as for the dynamic pressure transducer，Ytterbium has a higher sensitivity than manganin and carbon ones. The pressure range for Ytterbium transducer can be as low as kb.

Abstract:This paper analyzes the boresight displacement of the linear scan tracking radar caused by the sidelobe cancellation system. The effects of space between the primary and auxiliary antenna，and the element，configarations of the auxitiary antenna are also discussed.

Abstract:This paper describes CAD of a band-pass filters with planar circuit mounted in waveguide. Theoretical values agree very well with the experimental results. The computer program，with little reworking can be used to design other filters.

Abstract:This paper makes the first step to study the app1ication of fatigue summation damage theory by subaividing the manner of crack generation. The study on this field had been limited in using different formulaes to modify the contradiction in test. It proves that Miner's linear summation damage theory can be used for contact fatigue test，if the spacemen fai1ure is in the second surface crack generating failure.

Abstract:Using XPS， AES etc. e1ectron spectroscopic techniques and TG， XRD etc. physical methods，surface properties of continuous SiC fibre made from polycarbosilicane precursors have been investigated. The effects of various pretreatment conditions on surface composition，construction and characters of the fibre have also been compared. The data show that the coating layer on the surface of SiC fibre can be removed by heat-treatment at the temperature of 500℃ or by macerating with acetone，bulk construction in the SiC fibre may be ultra-fine crystallite of β-SiC; on its surface there is a layer of silicon oxide，which may be a-SiO₂ crystallite. When calcined. at 500℃ in the air，the layer of silicon oxide on the surface of the SiC fibre thickens and the free carbon content in the surface decreases with the calcinating time. This kind of silicon oxide in the surface layer of the SiC fibre has good stability in acids but is likely to dissolve in the hot concentrated alkalis.

Abstract:The transportation problem with capacity can be solved by the simplex algorithm for solving linear programming problem with bounded variables; but,the scope of this problem is often very broad. This paper gives a new algorithm.

Abstract:This paper first introduces the simultaneous linear equations that the coefficients of which are fuzzy numbers. It is a natural generalization of the ordinary simultaneous linear equations. By means of the analysis of the interval numbers and simultaneous interval numbers linear equations，we have obtained the necessary and sufficient conditions under which solutions exist for several kinds of these equations. Moreover，the methods to get the solutions are given in the proofs.

Abstract:This paper presents a simple tracking filter circuit，which is applicable to Doppler radar sets and consists mainly of a switched bandpass filter and a phase-locked loop. Experimental results demonstrate that it is characteristic of wide capture range，short capture time and satisfactory performance under noisy environment.

Abstract:This paper describes a method of designing a X-Band microstrip sum-and-difference circuit and gives the experimental results. The testing data show that a sample of the circuit developed by us has reached the level of the similar sample of Britain in some principal indexes.

Abstract:Plug compatibility is a new technigue in the information processing of chinese characters. The technigue enables a computer to have a great ability of information processing of chinese characters by utilizing the Plug Compatible Type Chinese Character Terminal and Printer. We have applied the plug compatible technique in designing HZD一7032 Chinese Character Terminal and HZP一7032 Chinese Character Printer System，the advantages of which have been proved.

Abstract:S_c=k√p₀ is a formula often used in the approximate calculation1 for the smal1-sized transformer. This paper points out that there exists a problem not allowing neglect in applying this formula and the improvement.

Abstract:The thesis suggests a kind of forma1ism of distributed database operations to present how to change the general operations into the loca1 ones. This forma1ism can be used as a tool to describe the transformation between general level operations and local operations，and can a1so be used as the beginning of the distributed program 1anguage or a design tool to realize the operational part of a general D-DBMS.