三维

A 3-D EVP model is generalized from the 1-D EVP model according to the rule of Lagrange's dissipative rate function occurring in the 1-D EVP model. Compared with experimental data obtained from consolidation-undrained triaxial shear creep test, the present 3-D EVP model is verified to be valid.

参照一维EVP模型的Lagrange耗散率函数所呈现出来的规律，把一维EVP模型推广到三维EVP模型，并与三轴不排水剪切蠕变试验数据相比较，验证了本文三维EVP模型的合理性。

The expansion coefficients Of aperture fields are Obtained after the three-dimensional arbitrary aperture fields have been represented by the sum of three-dimensional Gaussian function in the configuration-spatial wavenumber phase space.

本文利用Gabor原理把三维任意口面场表示成离散结构－波数相位空间中三维高斯基函数的叠加，将二维高斯基函数与相位空间谱双重正交的函数推广到三维，从而得到口面场展开函数。

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

采用基于边界构形的内缩法，实现了三维畸变网格的重新划分；提出了初矢修正法对触模节点的位置进行修正，解决了由于离散的模具网格的法矢不连续造成的&死锁&问题；采用准静态迭代法简化了速度场和温度场耦合计算过程；特别是针对减速因子β的选取，建立了适用于三维复杂成形过程刚粘塑性罚函数法有限元三次因子法的计算公式，并结合进退搜索法提出了改进的三次因子快速算法，提高了模拟计算效率和稳定性，在此基础之上，开发了面向叶片精锻过程的三维刚粘塑性热力耦合有限元模拟分析系统(3D-CTM)，系统的可靠性得到了圆柱体镦粗的验证。

Firstly, took the data of body model and garment model, and then finished the match with the curvature feature of triangular mesh by making mapping between body model and garment model, this process was a rigid transformation. In fact, it comprised the rotation matrix and translation vector. Finally, under the VC6.0, set up the platform of 3D clothing fitting by the super 3D building of OpenGL.

首先提取Poser 6.0中的三维人体模型和服装模型数据；然后通过三维网格模型的曲率特征在人体模型与服装模型之间建立映射关系来完成匹配，这个过程是一种刚体变换即获取旋转矩阵和平移矢量两部分；最后在VC++6.0的开发环境下，利用OpenGL强大的三维建模功能实现了三维试衣平台的搭建。

In this paper, the computer-integrated system, aimed at textiles design and 3D dressing rendering, is constructed with making use of theories of textiles design and 3D dressing modeling, combining the means of mathematics matrix computing, computer graphics and digital image technology. Some investigations on technology issues, such as automatic generation of weaves, simulation of fabric, modeling of 3D human body and garment, and texture mapping of fabric to garment, are also made.

本论文针对纺织品服装设计，运用纺织品设计理论、三维人体服装建模理论，结合数学矩阵运算、计算机图形学、数字图象处理等技术手段，构建了织物设计与三维实体着装模拟这一集成系统的框架结构，对织物组织的自动生成、织物外观仿真、三维人体服装的构造和曲面拟合、织物对三维服装的纹理映射等技术问题和算法，进行了较深入的研究和探讨。

The basic principle, advantages and disadvantages of the II were summarized. Computer-generated II based on 3DS MAX was proposed. The captures of three-dimensional information for II using 3DS MAX simulation and the display of three-dimensional information using an experiment assembly composed of a display screen and Fresel lens arrays were realized, respectively. The combination of the simulation and experiment resolved the flipping and crosstalk in conventional II.

介绍了集成成像技术的基本原理及其优缺点，提出了一种基于三维设计和动画制作软件3DS MAX的II技术，利用3DS MAX来实现II的三维信息的记录，利用显示器和菲涅尔微透镜阵列组成的实验装置实现II的三维信息的重现，解决了常规II技术存在的空间反转和串扰问题，从而研制出基于II技术的原理性裸眼三维显示器。

So we can use any 2D prestack procedure to process them, such as time migration, depth migration and velocity analysis.

它通过投影变换的方法，将三维叠前数据体投影为一系列的径向二维叠前数据体，从而将三维叠前问题转化为一系列的二维叠前问题来进行求解，使得三维叠前资料的偏移成像可以在中小型计算机上进行。

D models are the most widely spread in the world of turbo-machinery for its simplicity, but they are indeed purely empirical correlations which not only fail to provide detailed information inside one or more components, but also require significant effort to recreate themselves if engine operating conditions or component representations change; quasi 3-D models have been the workhorses for compressor and turbine design for many years, and the primary benefit of using quasi 3-D system models is to facilitate the design and detail analysis of a particular component across the range of possible boundary conditions; Full 3-D models are gradually replacing quasi 3-D ones by virtue of requiring no exit flow angle model and loss model and being capable of predicting secondary flow in cascade.

零维模型由于使用时简单易行，因此在涡轮发动机的仿真中得到广泛应用，但零维模型作为纯粹的经验关系式无法反映部件内部的流动细节，并且一旦部件有少许改动则新特性的建立耗费巨大；准三维模型由于能够详细地提供部件内部的流动情况，方便设计而成为涡轮和压气机设计的主要工具；全三维数学模型正逐步取代准三维模型在涡轮设计中的主导作用，同后者相比前者能够预测叶轮机械内的二次流动，在粘性流计算时不需要气流角和损失的经验公式，因此拥有巨大的发展前景。

Based on analysis and compare of all kinds of precept-sorting of feature of plastic product for the different structural plastic product, a 3D feature library of plastic product was built on the platform by integrating Feature-Modeling technique with parametric technique. The feature schleps its information of non-geometry by database-externed technique of the entity. After building the database of plastic material, the module of choice of plastic material is developed by technology of ODBC. The plastic product can be sculpted by calling of feature of plastic product and inputting parameters interactively.

针对不同结构类型的塑件，在全面分析、比较塑件特征分类的各种方案的基础上，采用三维特征建模技术和参数化技术，建立了注塑产品的三维特征库；应用实体扩展数据库技术，使特征携带非几何信息；再在建立塑料物性数据库的基础上，采用ODBC技术，开发了塑料材料选择模块；通过塑件特征的调用和人机交互输入参数的方法进行塑件三维造型，再把塑件的三维实体和塑件的非几何信息结合起来，生成塑件全信息模型。

Experimental results show that the 3D SPEZBC algorithm has the same rate-distortion performances of three-dimensional embedded zero block coding (3D EZBC) algorithm, obviously outperforms three-dimensional set partitioned embedded block (3D SPECK) algorithm, three-dimensional set partitioning in hierarchical trees(3D SPIHT) algorithm and (AT-3D SPIHT) algorithm, and is slightly better than JPEG2000 multi-component (JPEG2000-MC) algorithm at different bit rate in the compression performances.

实验结果表明，3D SPEZBC算法具有与三维嵌入式零块编码(3D EZBC)算法相同的压缩编码性能，在各比特率下编码性能均明显优于三维集合分裂嵌入式块编码(3D SPECK)、三维等级树集合分裂(3D SPIHT)和非对称三维等级树集合分裂(AT-3D SPIHT)算法，并且略好于多分量JPEG2000编码(JPEG2000-MC)算法。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。