In this paper, we have deduced the general diffraction transformation formula in optical 4F system, and calculated the optical intensity distribution near the imaging plate over three-dimensional space with obstacle disk model.

Based on the Xia men Ma xin main bridge, three-dimensional space finite element model is set up to simulate the hybrid girder cable-stayed bridge with single slanted pylon and fixed pier-pylon-beam system, and the structural dynamic characteristics and seismic response are analyzed in this thesis.

以厦门马新大桥主桥为工程背景，建立塔、梁、墩固结体系独塔混合梁斜拉桥的三维空间有限元模型，对其结构动力特性和地震响应进行了计算分析。

On this basis, a three-dimensional model of space model, and the realization of the algorithm.

在此基础之上，建立空间模型，并对空间模型进行算法的实现。

Through analyzing fracture process broken into crumbs of granite special-shaped surface, the plane and three-dimensional space fragmentation model were established and the fractal crushing characteristics were analysed.

通过分析花岗石异型面的材料断裂破碎成屑的过程，建立了平面和三维空间破碎模型，分析其分形破碎特性。

At the same time, to analyse the Frame-Tube structure with large-span truss transfer story, three-dimensional space model of real project is established, and the model is calculated by my FEM program and ANSYS.

同时针对大跨度桁架转换层的框架-剪力墙结构的工程实例，建立了空间三维分析模型，并对工程实例采用自编程序和ANSYS软件进行计算对比。

A three-dimensional space model of the selection of technique innovation pattern in enterprise is presented, which is built up by means of SWOT and the two-dimensional SPACE coordinate.

在此基础上，创立了企业技术创新模式选择的三维模型，并对此模型的运用进行了详尽说明。

Likewise, three-dimensional space model is established by MATLAB in random to verify the validity of the algorithm in three-dimensional space.

同样利用MATLAB设定了三维空间随机模型，仿真结果验证了算法在三维空间上的有效性。

Research methods: The calculation and analysis were made for the entire structure by adopting three-dimensional space model for subgrade, foundation and upper structure with the aid of large finite element MIDAS program and elastic foundation beam method to simulate the effect on the foundation with spring.

研究方法：借助于大型有限元计算程序MIDAS，建立地基、基础及上部结构的三维空间模型，采用弹性地基梁法，用弹簧模拟地基作用，对整个结构进行计算分析。

Finally we set up three-dimensional space model to simulate the space effect during tunnel construction, analyze the transaction between the left runnel and the right tunnel, and also analyze the deformation and stability of mid-partition.

最后建立了三维空间模型，对连拱隧道开挖时的空间效应、左右洞的相互影响，以及中隔墙的变形和稳定性进行了模拟分析。

A Research on Three-dimensional Simulation of Craniomaxillofacial Plastic Surgery

颅颌面整形手术仿真模拟的研究

Three-Dimensional Simulation Calculation of Flow in Circular Bend Tube of Gas Exchange System in Internal Combustion Engine

内燃机换气系统弯曲圆形管道流场的三维数值模拟研究

Three-dimensional simulation of thermal effects in a laser slab cooled by forced convection

对流冷却下板状激光介质热效应的三维模拟

The distributed three-dimensional simulation is very popular in the research field of three-dimensional simulation in these years.

分布式3维仿真技术是近年来3维仿真领域研究的热点。

Three-dimensional simulation of pulsatile blood flow in human thoracic aorta

人胸主动脉血液脉动流的三维数值分析

Research on Development of Three-dimensional Simulation Program of the Working Process for Swirl-Chamber Diesel Engine

涡流室式柴油机工作过程的三维模拟程序

Three-dimensional Simulation of Carbon Dioxide Reforming of Methane Over Coal Char

炭体系下二氧化碳重整甲烷三维数值模拟

Experiment study on overburden movement law around hydraulic jet coal mining face with three-dimensional simulation

水采采场上覆岩层运动规律的三维相似模拟试验研究

Three-dimensional simulation on the twin roll casting process of stainless strip

双辊铸轧不锈钢薄带的三维有限元数值模拟

Three-Dimensional Simulation of Solidification of Steel Castings and its Application

铸钢件三维凝固模拟及应用

Developing interactive three-dimensional simulation tools with OpenGL for chemical engineering scenes

用OpenGL开发交互式三维化工场景仿真工具

Based on Three-dimensional Simulation of Optical Panoramic Imaging Mechanism

基于三维光路仿真的全景成像机理研究