Abstract:Two problems in 3-D realistic graphical techniques are discussed in detail in this paper: texturing; and the fractal method and its application to Computer Graphics. Texturing is the process of simulation of the surface details of objects on the basis of 3-D shaded pictures. There are two kinds of texturing. The first is applied to smooth surface while the second is applied to rough one. The fractal method is a new method of describing the irregular object. The writer's opinion on it is presented in the paper. The method of simulating the terrian and the processing results are given as well.

Abstract:This paper discusses some of the circuit schemes and the calculation methods of the changeable horizontal frequency scanner. By means of the study of some practical examples and experimental implementations，in it are presented the main points of the design methods of horizontal scanners with continually changeable frequency.

Abstract:Families of p^k-ary sequences with small Hamming crosscorrelation are required for hopping patterns in asynchronous frequency-hopping spread-spectrum multiple-access communication systems. Lower bounds on the out-of-phase auto correlation and on the crosscorrelation of sequences of given length and alphabet size are derived in [l]，and a method of constructing families of sequences that uniformly realize these bounds is presented as well. In this paper，a commonest method of constructing families of frequency-hopping sequences with optimal Hamming correlation properties is presented，taking the method in [1] as its special case. By driving the frequency synthesizer from k inconsecutive stages Tather than from k consecutive stages，we can partially solve the Hop-and-Stay problem existing in [1].

Abstract:There are not any general conclusions about periodicity of DES when it is used in stream cipher system. The author discusses this problem and gives a low bound for period of S-boxes.

Abstract:The eigenvector spectrum method is an effective method for resolving coherent signals in array processing. It requires that the minimum eigenvector of the received array signals covariance matrix R should be obtained first. Instead of gradient descent and space triangular ladder methods，we propose a new one-transforming adaptive algorithm method for implementation of the eigenvector spectrum. This method turns the problem of finding the minimum eigenvector，through a simple transformation，into that of finding the maximum one，thus the complicated calculation of R^-l can be eliminated. Theoretic analysis and simulation results show that this new method is superior to gradient descent one in convergence rate and to space triangular ladder one in computation complexity.

Abstract:In the paper a fast terrain correlation algorithm to be called the generlized ordering aequisition of statistics (GOAS) is proposed by means of continuity of the aircratt track，which is better adaptable when the course of aircraft drifts off the axis of reference image. The algorithm can not only serially process the data of real-time image but also continually gives rough match information. Monte-Carlo simulations have shown that its performance was better for the drift angle θ＜5°and its CEP was less than 50m for SNR=3.

Abstract:This paper deals with feedback linearization for a class of nonlinear singularly perturbed systems. First，the N-order approximate system about the singular perturbatation parameter e is obtained with the concept of integral manifold. Then，the feedback linearizable relationship between the reduced system and the N-order approximate system is presented，the results are shown to provide the calculating formulas of the linearization transformations，and an example is discussed.

Abstract:In this paper，the explicit recursive Newton-Euler dynamic equations of PUMA 560 are derived and a parallel implementational scheme of decentralized adaptive control for robotic manipulators is presented. Analysis of algorithm computational complexity shows the high efficiency of the implementational scheme.

Abstract:A simple and straightforward algorithm for sìng1e camera 3-D vision has been introduced. The approach uses both the information of the single image and the information provided by a few 1aser p1anes. The ana1ysis of the image information creates the correspondence between the feature points of a solid in space and their image points. The structured light provides a spatia1 coordinate system to measure these feature points in the working space. The a1gorithm has been used in GKD-1 robot vision system working with a RM-501 robot.

Abstract:The measurement of spind1e rotating accuracy of machine tool is one of the important items in the fie1d of mechanica1 measurement. In this paper，a digita1 measuring system is introduced. Here the digital filtering technigue is successfully used to solve the problems which are difficult to be solved by the analog measuring method. The precision of measuring is 0.1μm.

Abstract:In this paper，the thesis of "Double-Frequency Chattering" is first presented，the mechanism is also investigated; The conclusions are a11 supported by the experiments. We consider that the Investigation of "Double-Frequency chattering" has not only the important practical value，but also will lead to some revisions of traditional theory of machine tool chatting.

Abstract:This paper introduces the key technique used for remote automatic measurements of temperatures of solid-propellant pulps being agitated in a horizontal mixer of the size 100 liters，inc1uding selection of measurement points，definition of measurement head appearances and sizes and installation structures，so that a complete automatic measurement of temperation of medical pulps agitated with a mixer can be implemented. In addition，the calculation of insertion errors of measurement heads is presented in the paper.

Abstract:Effect of IHT on low-temperature toughness of welten-80P 20CrMnSi and 20CrMnSiNi2A has been investigated in this paper. The results show that the impact toughness of IHT is increased 1-3 times as high as that of the conventional Heat Treatmeat. The Fracture appearance transition teapeatwe (FATT) is decreased by at utmost 54℃. Therefore IHT is a measure of increasing low-temperature toughness. In this way it is possible to apply this technology to production.

Abstract:Twelve Kinds of thermochromic Nickelous compound series are developed and their thermochromic temperatures (Tc) have been determined seperately. The effects of the pigment composition，base stock，filler and environmental relative humidity on the thermochromic characteristics of cited series are investigated. The thermochromic mechanism is discussed.

Abstract:Judging model's order is an important problem in time series analysis (such as parameter spectral estimation，system identification. regressive analysis). This paper discusses and analyses several ways to judge model's order which have been developed. At the same time it point out their usage. and compares them with each other.

Abstract:The eight atomic and molecular problems in studing of interstellar space are recommended: 1. Observation about interstellar molecules 2. Formation about interstellar molecules 3. Atomic collisions 4. Atoms in highly excited states 5. Ionization problems 6. Broadening about spectra 7. Oscillator strongth 8. Interstellar Maser