1993 Vol. 18, No. 1
Based on having analysed current graphic output of digital topographic maps,the design principle of Graphic Output System for Topographic Maps(GOSTM) is proposed in this paper. Fundamental functions of each module, system structure and data interface will be given in detail. This system has implemented graphic output of topographic maps,connect-ing with Digtial System for Topographic Maps (DSTM).
In urban development,there is a ciose relationship between the planning and the economy. Urban plannings and decisions have a rich economic internal relation. As long as the plannings combine effectively with economy, the plannings and decisions can affect and confine the whole process of urban development. Threshlod theory and it's applications have become a tool for urban planning,e. g. Threshold Analysis Method. It ushers a new way for the plannings connecting with economy. On the lands in area of urban development,to select the positions of an engineering construction may have several projects, but one of them should be the optimization. The procedure of Threshold Analysis Method of urban develop-ment is described firstly, finally it discusses the optimization to the programs of position finding of engineering by the Fuzzy-grey situation decision.
In this paper, the regression analysis, which is usually used in dam deformation analysis is discussed. It is shown that the number of selected independent rariables is less than it is real one,because of multi-collinearity between independent variables. In order to over-come effect by multi-collinearity, the author proposes some suggestions about independent variables-snooping.
Nonparametric regression is a generalized regression which has some advantages of intuition,relaxed restriction on the adopted model and easy computation. The principle of nonparametric regression and it is application to GPS-leveling prediction are introduced. Fi-nally,the method is demonstrated by test computation of two real GPS-leveling networks and it comes to some valuable conclusions.
This paper deals with the robustness and efficiency of surveying data processing from the point of view of efficiently using information available and relationship between them. The essential difference between the robust estimation and classical estimation has been described. It also presents the principal criterion for robustizing the data adjustment and com-parison between ressistance and efficiency with several examples.
This paper discusses the problem of the selecting the parameters of the non-anallactic telescope and prensents the computing formula and the example. It is show that fied of wiew can be satisfied read off leveling rod with the stadia is minimum.
This paper presents the structure and functions of the Quasi-real-time Microcom-puter Image Processing System. It uses a Digital Signal Processer chip TMS320C25 to ma-nipulate image signal. And discusses some key point techniques of implementation high-quali-ty image processing.
This paper describes the main functions,design and implementation of The Nation-al Information System of Surveying and Mapping,centring on the system structure,database design,and programming method of retrieval and service,graph and data exchange. It pro-vides a new information retrieval method called as INDEXING MAP that can be applied to any information management system with geographical distributed features.
Zhang Qijun;Zhang Wei The text mainly describes the program desinging method of data recording func-tion in Managing Informatoin System(MIS). It puts for ward and achieves the new idea forthe first time that program and data separates on construetion and coincidents on function. The system doesn't need to compile program for generd recording program of and DATA BASE system. It can realize date recording function in three screen modes such as card table and textbook. Only by means of calling interface program——DATA MAKE. FOX. The system is completed by using FOX BASE+2.0.
By using the integral operator, the fractional integration and differentiation have been defined and their series expansions were given in the paper. And the numerical evalua-tion of the fractional integration and differentiation were also introduced.
In the paper,particular organization of data and the algorithm of one dimensional Fermat Number Transform are used to obtain multi-dimensional Fermat Number Trans-form. Since the computed results can be stored in the same place as the orginal one is,there-fore by using this algorithm, its storage requirements are limited to the original data array only.
This paper presents a method of applying a system which consists of an optoelec-tronic scanner (TV camera or CCD),a microscope and an IBM-PC computer to abtain the micrograph information from the worn region on the flank of the cutting part of the tool and analyze and process the picture by means of imagine processing and mode recognizing tech-nology,The on-line and off-line methods are used respectively to calculate accurately the worn value,recognize the form of wearing. Base on these,the manufacturing process could be recognized and controled. At the last,the optimum values of cutting velocity and feed are given, which meet the principle of the lowest cost and longest tool life. It is proved by experi-ments that the conclusion of the theoretical analysys and calculation agrees with the practical tests. The article provides a practical and precise way of recognizing and controling manufac-turing process on line.
The authors strictly presented the color conversion equation from the color mixed by the R、G、B of the CRT to the one by Y、M、C of the inks. Also,we have disscussed the conditions that the equation must match and presented the pratical condition. Finally we got some useful results.
This paper describes the principles and methods of making high resolution halflone film by means of computer. Several problems are discussed in detail,including the structure of halftone film, the angle adjustment of halftone screen line, the design of halftone dots mode and it's representation and the implement of making halftone film.