three-dimensional problem

A two-direction shear deformation finite element model is presented in which a three-dimensional problem is reduced to a two-dimensional one and thus the calculation is much simplified .

文中提出了双向剪切变形有限元模型，使三维问题简化为二维问题，计算工作量大为减少。

The analytical results show that the distribution regularity of additional load is closely related with the relative position of underground pipeline and shield , and it is a three-dimensional problem .

研究结果表明：附加荷载的变化规律与地下管线和掘进机的相对位置密切相关，是一个三维问题；

On the ocean currents as a three-dimensional problem

论海流的空间问题

Three-Dimensional Problem in Theory of Micropolar Elasticity

各向同性微极弹性理论的空间问题

Container loading is the three-dimensional problem in " cutting and packing " problems . It is combined optimization with complex constraint condition .

集装箱装入问题是切割和装入问题领域中的三维空间问题，是具有复杂约束条件的组合优化问题。

Based on the original three-dimensional problem , the time restriction was added to suit the four-dimensional guidance of multi-missile coordination .

在原有的三维空间的基础上增加时间维，使导弹满足协同作战的四维制导要求。

This paper changes the three-dimensional problem into the two-dimensional problem by making use of the mapping principle and sets up a simple and accurate method that is used to design the geometric angle of wood cutting tool .

本文应用映象原理，将空间问题平面化，进而形成了一种向量法求解木材切削刀具几何角度的简单精确的方法。

The longitudinal deformation of the element block is governed by the compatibility conditions between the blocks , hence the three-dimensional problem of torsion of the box-girder is reduced to a one dimensional one .

梁段单元沿纵轴线的变形规律由节段间变形的连续条件控制。将箱形梁扭转的空间问题简化为一维问题。

But the translation-and-torsion coupling vibration of structure is a three-dimensional problem , and the experimentation is limited to the size and quantity , so the computer simulation becomes the main means to study the torsion effect .

由于结构地震反应的平-扭耦联振动是三维空间动力反应问题，结构试验研究受到试验规模和数量的限制，因而主要是依靠结构动力分析手段对其进行计算机模拟分析研究。

This paper statute the three-dimensional problem to two-dimensional plane and prove the sufficient condition of three-dimensional wireless sensor network connectivity coverage of the body-centered cubic structure , and also give the node deployment of certainty coverage .

本文通过把三维空间问题规约到二维平面，证明了体心立方结构的三维无线传感器网络连通覆盖的充分条件，使得体心立方结构模型可以正确的应用于三维无线传感器网络的连通覆盖。

The two-dimensional limit equilibrium tends to be mature , but the problem of the slope transformation and destruction is three-dimensional problem , so , it always estimates the stability and provides the design parameters on the high side through the analysis of two-dimensional model .

边坡二维极限平衡条分法已趋成熟，但是边坡从变形到破坏本身就是三维问题，按二维模型分析，往往会低估了其稳定性，并导致治理工程设计参数偏大。

For the two-dimensional problem , it can generate triangular element meshes and quadrilateral element mesh ; for the three-dimensional problem , it can provide a grid cell including the tetrahedron , hexahedron , pyramid , wedge-shaped body and hybrid grids .

对于二维问题，可生成三角形单元网格和四边形单元网格；对于三维问题，提供的网格单元包括四面体、六面体、棱锥、楔形体及杂交网格等。

In the present paper , a numerical method for three-dimensional problem and the analysis of its stability are estab-lished and a numerical result for a practical model is given , which shows that the abnormal pressure and paleo-temperature computed are reasonable and display physical characteristics clearly as well .

本文给出了三维问题的数值解法，模型问题的稳定性分析以及计算实例的数值结果，计算得到的超压和古温度合理，有很强的物理特性。

Numerical Analysis and Research of Hydraulic Torque Wrench with Three-dimensional Contact Problem

三维接触问题的液压扭矩扳手的数值分析与研究

A nonlinear optimization method for solving three-dimensional inverse problem in acoustic scattering

三维声散射反问题的一种非线性最优化求解方法

Finite layer analysis of three-dimensional excavation problem of transverse isotropic soil

三维横观各向同性土体开挖问题有限层求解

Method of fundamental solutions for a three-dimensional inverse problem in linear elasticity

基本解方法求解一个三维线弹性力学反问题

Three-dimensional Loading problem is a kind of typical NP-complete problem .

三维装箱问题是一类典型的NP-complete问题。

The new research and development of three-dimensional inverse problem of runners of hydraulic machinery

水力机械转轮三维反问题研究及其新进展

A Hybrid Simulated Annealing Algorithm for the Three-Dimensional Packing Problem

求解三维装箱问题的混合模拟退火算法

Notes on Theoretical Analysis of the Second-Order Wave Forces in Three-Dimensional Diffraction Problem

三维问题中二阶波浪力理论计算的注记

A hybrid boundary element method in three-dimensional thermoelastic problem

三维热弹性力学问题的混合边界元法

Air route planning is a three-dimensional planning problem , with wide range , many objects and many constraints .

飞行航路规划是一个大范围多目标多约束的三维规划问题。

The high-speed movement of the hydrodynamic drag device in free surface is a highly complex three-dimensional flow problem .

水力增阻器高速冲到水中并在自由面上运行是一个高度复杂的三维流动问题。

Exact Solution for Three-Dimensional Three-Object Problem with Harmonic Interactions

受谐相互作用的三维三体问题的精确解

Based on the principle of composite element method , a new algorithm for the three-dimensional seepage problem in discontinuous rock masses is presented .

基于复合单元法的原理，提出了不连续岩体三维渗流的新算法。

An optimal design method , based on genetic algorithm and three-dimensional inverse problem design method , has been used to improve the design of a Kaplan turbine .

本文提出了一种结合全三维反问题计算与遗传算法优化的轴流式水轮机转轮设计方法。

For the modeling and solving convenience , we introduce five basic assumptions , so the three-dimensional unsteady problem is simplified into one-dimensional stationary problem .

为建模及后续求解的方便，本文引入了五个基本假设，将三维非定常问题转化为一维定常问题。

The application of the method of fundamental solutions is considered for the numerical solution to a three-dimensional inverse problem in linear elasticity , i. e. , the Cauchy problem associated with the Navier system .

将用于求解椭圆型偏微分方程边值问题的基本解方法应用于求解一个三维线弹性反问题，即Navier方程组的Cauchy问题。

In this paper the three-dimensional convection-diffusion problem is reduced to a manageable two-dimensional problem , equivalent to only consider the flat direction of the convection-diffusion without considering the vertical movement of material deposition .

本文把三维对流扩散问题简化为比较容易处理的二维问题，相当于只考虑平面方向的对流扩散运动而不考虑垂直方向的物质沉降。