1990 Vol. 15, No. 3
This paper applys computer aided optimization design to CRP.It has dealt with the structure,the function and the making method of a system of computer aided optimization design.Author has constructed a programming system of computer aided Network Optimization Design in close range photogrammetry SNOD-C.The system can design the contents of the number and the locations of photograph stations,the number of photos on each station,the photograph forms,the distribution of control points and object points,the selection of cameras and measuring instruments,the selection of non-photogrammetric observations,etc.At the same time,the SNOD-C's sub-system of self-Calibration Bundle Adjustment with Relative controls SCBAR,which is based on the latest theory of photogrammetric adjustment,is adequate to the data-handling of general CRP.At last a practical example of network design in CRP has been given.
In this paper,spectral analysis by least squares is used to analysis transit time measurements of gyrocompass.A kind of new function model is found,which is more convinent and practical than ones used before.The precision of Multiple Transit Times Mothed is analysised with a group of practical measurements.
In this paper the computation method of geoid variation with time by repeated level-ling and gravimetry is discussed by the authors.The optimization method of positional parameters of fictitious point masses is presented.The fictitious point mass method over-comes the disadvantage of stokes integral and collocation.Simulated computation shows that the computed geoid variation is very accurate.
After adding terrain correction,ellipsoidal and atmospheric gravity correction.The height anomalies in a basin margin area have been studied using two procedures(Meissel Procedure,Wenzel Procedure).Comparisons have been made between the computed results and the results derived from Doppler Positioning.Good result is obtained,then some re-marks and suggestions on the determination of accurate height anomaly are given.
This paper chiefly discusses the establishment of the velocity surface and the acceleration surface of the whole deformation area.At the same time,it also discusses models with which to get these two surfaces.These models include the indirect model based on the multiple successive regression and the direct model.With these models,we gain a panormatic view of the whole deformation area in evaluating deformation.It also become convenient to get the deformation of any point within the deformation area during any surveying period,as long as the plane coordinates of the point are known.
Today,in cadastral survey the coordinates of boundary poins are required to be determinated in the national coordinate system with a very high accuracy.Aerotriangulation is a well-known fast and accurate tool for this purpose,but it has not be windely used in China until now.This paper describes the principle and character of determinating the coordinates of boundary points by the use of analytical photogrammetry and the newly developed program system for combined adjustment-WuCAPS(abbreviated from Wuhan Combined Adjustment program System) by Department of Photogrammetry and Remote Sensing at Wuhan Technical University of Surveying and Mapping.Some experiment results for xi'an cadastral project are given.The planimatric coordinate accuracy reaches ±6~7cm in the ground,which shows the applicability of high accurate photogrammetric point determination in cadastral survey.
On the basis of color science theory,author mader a theoretical deduction of tri-mulous coversion of corresponding colors between different surrounds and generized predicted results of different kind of color samples.At last,author devised a compute pro-gram so as to complete autmobily predicting process.
This paper presents the method of laser interference measure small angles with optics multiplication non-reference angles.The formula is derived for laser interference measure of angles with non-reference angles and method concened.The plan is formulated,which accomplish the laser interference measure of small angles with optics,machinary,electricity and micro computer,therefore a system of laser interference measure of small angles is built,including small angles turning terrace,optic grating system of measuring interference pattern and microcomputer automatic handling system.Results for the method are found to be closed to the experimental data.The repeatability error of measuring angles is less than 0.03 sec.
The solutions of many real-world problems require reasoning under fuzzy logic.Fuzzy reasoning is well-known techniques in control system,expert systems and various fields of artificial intelligence.In this paper,we discussed the representation of fuzzy knowledge on the basis of fuzzy sets and fuzzy inference theory,and used the member-ship functions to discript the fuzzy logic variables.We then show that the inference mechanism on conditional possibility distributions leads to valid results.The role of the predicate modefiers in fuzzy reasoning was also discussed.
This thesis is to study the methods of establishing Trip Production Model by using regression analysis.Some problems on the selection of independent variables and regression diagnostics have been discussed.Two examples are used to compare alls election rules,and the results show consistance.The influences on the results deriving from the over influence points,high leverage points and outliers are studied.The general procedure for the selection of independent variables is shown in thesis,also the applicable methods of polynomial regression diagnostics,especially,the methods for detecting outliers.When dependent variable is affected by some element which couldn't be quantified,we can add the quanlitative variable to improve the results of regression.According to these studies,a method establishing Trip Production Model by using regression analysis has been suggest-ed in this thesis,which was used to set up the trip production model of Beijing,and the result is satisfactory.
The condition of"slowly increment charactor" is first presented by Lenglart.E. and others in reference,it is of important control role in the convex Φ-inequalities on martingale.On the base of this,the paper gives a necessary and sufficient condition for"restricted slowly increasing charactor" functions.
There are two methods to get the vector Chinese characters:Digitizing and Raster-to-vector Conversion.After a general view of these methods,a new Raster-to-vector Con-version method based on the Minimal First Conversion of 8-neighbor Adjacent Matrix is derived.In order to efficiently solve the boundary conversion of a dot Chinese character,the method of Enlarged Matrix is proposed.Some other Raster-to-vector Conversion methods(i.e.distance transformation,skeleton,border following,ect) are also discuss-ed.The formulas of geometric transformation for locating and directing the characters in a drawing is given by means of an azimuthal angle.Using above conclusions,the author and his colleagues have successfully designed the online and offline functions of"automatic filling Chinese character and Chinese report" on INFORMAP Ⅲ graphic software.That software is made from the Synercom Technology Inc.of U.S.A without providing any Chinese character function yet.The experiments show that the above methods can not only be applied in automatic filling Chinese characters in any computer's graphic drawings,but also in Chinese characterizing graphic softwares and processing scan images.