The process in which the rapid feed back to the alteration of purpose is realized, the history design is maintenanced and the design method of layout based on the mechanism of mapping and code/decode is presented, which has been successfully implemented in the 3D system of INTESOLID.

The ERP system modeling technology mentioned above is just based on the three-dimensional system modeling frame model, and it is further discussed in the two aspects of this model: business analysis and system model mapping dynamically.

This is a three-dimensional system with parameter a* describing the green/red percentage and parameter b* the blue/yellow percentage of a color. L* represents the lightness of a color.

With dynamic optimization and Pontryagin maximum principle,a three-dimensional system is set up,and its stability is analyzed. The conclusion shows that public expenditure and the efficiency of environmental management have important influence on environmental quality,capital and consumption.

Solved under the magnanimous data environment to guard against floods information fast processing, inquiry, analysis and so on crucial the technology, has completed the entire province 1: 250,000 three dimensional scenes as well as Dawen River basins 1: 10,000 three dimensional scenes constructions, and has connected the flood-control works database, has realized the partial flood-control works information three dimensional inquiry, has realized the hydrodynamic force model in three dimensional system application.

The present research methods on gait identification system is analyzed,classified and summed up in this paper. On the basis of existing research methods,a new method based on three dimensional system modeling tracking is described.

Using the method of rapid static positioning cooperated with tape measure, it is concluded that except some points, the positioning was relatively precise, the average value of RMS was 2.84, variance was 2.96, and △B, △L, and △H were 1.2, 1.2, and 4.3m with their variances being ±0.6, ±1. 1, and ±21.1, respectively, which could meet the needs of forestry management sufficiently.

By analyzing the existing Web GIS system based on VRML,its disadvantages were pointed out andthe next generationstandard for Web3D — X3D(Extensible 3D specification.)

Web GIS正经历着从二维系统到三维系统的发展,分析了现有基于VRML的三维Web GIS,并指出其中的缺点。 介绍了新一代三维网络图形标准X3D,并结合Web GIS本身的特点,提出了基于X3D的三维Web GIS模型。

This transformation proceeds gradually that is, the 1D condensation process exhibits no features characteristic of the phase transition in a 3D system.

The AMB and PLB attachment sites in 35 dissected cadaver knees were measured with a 3D system, as were anatomical landmarks of femur and tibia.

The VECTRA-3D system was validated to determine its minimum resolution and accuracy.

The surgeons tended to favor the 3D system despite their use of 2D systems in their own practice.

Ventricular volumes were also obtained by a simplified 3D system using only the three standard apical views (C) and by the ordinary biplane Simpson's method (D).

A planar representation of the three-dimensional system of strictly homogeneous linear inequalities was considered.

A three-dimensional system of jumps also develops in the jet itself.

The method allows an aerodynamically sound transition from the three-dimensional system of equations of gas dynamics to a two-dimensional system, which considerably simplifies the problem and reduces by an order the machine time required.

In the LiKZnP2O7 structure, the zinc phosphate anion of the same composition has the form of a three-dimensional skeleton with a three-dimensional system of channels.

The structural components are joined together via a three-dimensional system of hydrogen bonds.

For radiative direct exchange areas in three dimensional system, the Uniform Deterministic Discrete Method (UDDM) was adopted.

The numerical examples of direct exchange area in three dimensional system with nonhomogeneous attenuation coefficients indicated that the UDDM can give very high numerical accuracy.

In the paper, a stationary temperature field in a three dimensional system of a direct floor heater was modelled.

A three dimensional system of ordinary differential equations modeling two predators competing for a renewable resource is analyzed and a periodic solution established in the open octant by a bifurcation from a two dimensional limit cycle.

How do red wood ants orient when foraging in a three dimensional system I.

The accuracies of geodetic heights of terrestrial net are important for selecting of the approch of combined satellite and terrestrial net adjustment. Starting from the basic mathematical model for the combined adjustment of two nets, a general expression for the effects of small changes in the initial values of geodetic coordinates of terrestrial net on the corresponding adjusted values of the coordinates in the combined adjustment has been derived in this paper. By using a simulative net, the authors computed...

The accuracies of geodetic heights of terrestrial net are important for selecting of the approch of combined satellite and terrestrial net adjustment. Starting from the basic mathematical model for the combined adjustment of two nets, a general expression for the effects of small changes in the initial values of geodetic coordinates of terrestrial net on the corresponding adjusted values of the coordinates in the combined adjustment has been derived in this paper. By using a simulative net, the authors computed the corresponding coefficient matrices which represent the effects of the changes in geodetic latitudes, longitudes, and heights on the adjusted values in the combined adjustment. The matrices show that if the accuracies of the components of geodetic coordinates of terrestrial net are nearly on a level with each other, through the combined adjustment the residuals of the adjueted geodetic latitudes induced respectively by the standard errors of the components are held in the same magnitudes。According to the results of the numerical calculations and analyses on the simulative net, it comes to the conclusions that the accuracies of either heights or positions in two-dimensinnal space are of the same significance for the combined adjustment in threedimensional coordinate system, however, it does not mean that the same magnitude of accuracies of the heights and the positions are required o An important problem lies in reliable acquisition of the information about their accuracies. It is preferable that the combined adiustment should be carried out in three-dimensional coordinate system provided the accuracies of geodetic heights can be reliablely determined, even though the accuracies of geodetic heights are low。When the determination of the reliable accuracies of heights is difficult, the assignment of a smaller weight to geodetic heights may significantly weaken the unfavorable effects on the results of the adjustment。It is likely more appropreate to perform the combined adjustment in three-dimensional coordinate syste mthan in two-dimensional space where the components of the heights are abandoned, though the useful information contributed by heights to the adjustment would be lost in a certain extent。

In this paper,we Consider unconditional stubility of third-order prey-predatory system(1.1)with delay.The unconditional stability domain and conditional stability domain of(1.1)are obtained.

本文研究了捕食者只有成熟期,且成虫 y 仅捕食成虫 x_1的三维系统(1.1)平衡点的稳定性态,得到了系统平衡点无条件稳定性的充要条件以及无条件稳定域与条件稳定域.

MSC/pal is a stress and vibration analysis package for the static and dynamic analysis of mechanical systems,components,and structures running on a personal computer-IBM PC with 256K of memory and two floppy disk drives(a hard disk is not needed).It uses the finite element method to solve displacements,forces and stresses of two-or three-dimensional systems.In addition to extensive tabular output,graphical output is available.A prep- rocessor program provides the way to create input files automatlcally.The interactive...

MSC/pal is a stress and vibration analysis package for the static and dynamic analysis of mechanical systems,components,and structures running on a personal computer-IBM PC with 256K of memory and two floppy disk drives(a hard disk is not needed).It uses the finite element method to solve displacements,forces and stresses of two-or three-dimensional systems.In addition to extensive tabular output,graphical output is available.A prep- rocessor program provides the way to create input files automatlcally.The interactive program is coded in advanced BASIC.It can be modified to suit individual requirements.

MSC/pal 是一个用微机运行的应力和振动分析的软件包,用于对机械系统、部件和结构进行动态和静态分析。该软件要求 IBM PC(或其兼容机)具有内存256K 及两个软盘驱动器(不一定需要硬盘)。该程序用有限元法求解二维或三维系统的位移、受力和应力,并将结果用表列出或图形输出。本文还提出一个预处理程序以便自动生成输入文件。这一对话式程序是用扩展 BASIC 语言写成,并可方便地修改,以适态不同的需要。