无限远

为了适用于延伸到无限远的单元，假设形状函数类似于Lagrange多项式，但包含了一个按指数衰减的项。

The shape functions are assumed to be analogous to Lagrange polynomials but including an exponential decay term so as to be appropriate for elements which extend to infinity .

该专业相机用于数码建筑摄影，具有从最近到无限远的全位移自主选择功能。

The professional camera for digital architectural photography with freedom of all displacements from close range to infinity .

本文基于无限远像距光学系统原理，完成CCD成像光路设计及相关部件。

The image-forming system design completed in the thesis is based on infinite image distance optics theory .

基于OSLO的无限远像距消色差显微物镜的设计

Design of an Infinite Image Distance Achromatic Microscope Objective Based on OSLO

PAL具有线性投影关系、方向选择性、景深无限远等重要特性。

PAL has many important characteristics such as linear perspective , direction selection and infinite depth of field .

它会看上去好像是无限远，而且不会跟踪对象的位置，只沿着Z轴作为方向。

It will appear as if it was infinitely far away , and won 't track object 's position , only the direction of Z axis .

以同样的方法计算，日产（Nissan）的纯电动汽车Leaf每加仑汽油能跑无限远的距离，该款汽车也将于2010年末推出。

Using the same calculus , the all-electric Nissan Leaf , also set to be introduced in late 2010 , does infinite miles per gallon .

DIC与无限远光学系统的结合，减小了棱镜、检偏器的插入引起的负面影响。

The combination of DIC with infinite optical system reduces the adverse effect caused by insertion of prism and analyzer .

默认情况下，startDate是“现在”，endDate指无限远的未来。

By default , startDate is " now " and endDate is infinitely far in the future .

设计了线结构光共焦扫描显微成像光学系统，使用光学设计软件OSLO设计了专用的无限远像距半平场显微物镜和激光扩束准直镜。

The optical system of line constructive laser confocal scanning microscope is designed . The optical design software OSLO is used to design special infinite image distance half flat field objective as well as laser extender and collimating lens .

气体分子彼此相距无限远。

The gas molecules are infinitely far apart from one another .

虽然能装上，但装在一起后无限远的标记总差一点点。

Although the lens will mount , it will bind with the body just slightly from the infinity marking .

对无限远以及边界上的情况进行妥善设置，并采用高斯积分公式和刚体位移法对矩阵元素的计算进行优化。

After that , properly handle the situation of infinite boundary , using Gaussian integral formula and rigid displacement to optimize the calculation .

该检测系统由无限远动态目标发生系统、稳定平台及其机械、电控系统构成。

The dynamic resolution detection system is composed of the infinity dynamic object generation system and stabilized turntable to simulate the flight attitude and their mechanical and control system .

为了适应航空相机性能测试的需要，本课题在室内设计了一套宽光谱、大视场航空相机无限远目标模拟系统。

To test the function of aerial camera , infinity target simulation system of an indoor detection device for aerial camera of wide spectrum and large field is designed .

从静态的角度看，一个目光无限远，经过充分市场调研，并且经过缜密的理性分析的市场营销策略也许是可行的。

From the static point of view , a vision infinity , after adequate market research , after careful and rational analysis of the marketing strategy might be feasible .

同时，实现了有限元和模拟电荷法耦合求解无限远场域问题，提出了实现无界场域电场的高精度数值求解的一种新思路。

Furthermore , a novel combined finite element method and charge simulation method has been proposed in this thesis for realizing the electric field computation of open boundary problem .

酒店的著名布林德利水疗中心提供每日太极班和一个至无限远游泳池，创造了一种泉源不绝的错觉。

The hotel 's renowned Water 's Edge spa offers daily tai chi classes and an infinity swimming pool , which creates the optical illusion of continuing cascading water .

在振动台上进行拱坝动力模型试验时，设置人工阻尼边界，以模拟地震时地震动能量向无限远域地基逸散的地基幅射阻尼效应。

Artificial damping boundary is adopted in seismic model test of arch dam on shaking table to simulate the radiation damping effect due to energy dissipation in infinitive foundation .

现代金相显微镜已普遍采用无限远光学系统设计，并广泛使用平场消色差物镜、广视场目镜、高倍干物镜；

Most modern metallurgical microscopes adopted the so-called infinity optical system design , in addition , plano-achromatic objectives , wide-field eyepieces , and high magnification dry objectives are widely used .

有限元法是计算接地系统接地电阻的有效方法之一，但难以处理土壤的无限远边界问题。

The finite element method ( FEM ) is a useful approach in earthing resistance calculation of grounding grids , but it is difficult to deal with the infinite earth boundary .

靶标和面源黑体组成的温差源通过红外光学系统成像到无限远，模拟无限远目标，供给热成像装置接收。

The MRTD source with target and plane blackbody is imaged at infinite place to simulate the infinite target by using infrared optic system , so as to be received by thermal imaging system .

文中还讨论了当坝体上游面倾斜、库底倾斜或水库为无限远时对作用在坝体上游面上动水压力的影响。

The influence upon dynamic water pressure on the upper side of a dam is also discussed while the upper side of the dam or the reservoir bed are supposed to be inclined or the reservoir is extended unfinished .

本文分析了一种折射率为球对称梯度分布的球形透镜的像差，得到了该透镜对无限远物点的纵、横向球基及其焦距的精确表达式。

In this paper the aberrations of a sort of sphere lens with spherical Symmetrical gradient index have ben analysied . The accurate expressions to calculate the focal length and their longitudinal and transverse spherical aberrations on infinite objective point have been obtained .

其核心思想是通过坐标映射将单元沿某一方向延伸到无限远，然后通过无限远处的单元积分使得电位快速衰减为零，从而无需考虑截断边界条件。

The core concept of infinite element boundary condition is extending the element to infinity in a certain direction with coordinate mapping , then make the potential rapid decay to zero through element integral . Thus , truncation boundary condition is unnecessary to consider .

利用二级分形有限元方法离散含裂纹结构，这将使得自由度大为减少；使用边界元方法计算外域辐射声场，这将自动满足无限远辐射边界条件。

The fractal two-level finite element method is employed to model the cracked structure , which can reduce the degree of freedoms greatly , and the boundary element method is used to evaluate the exterior acoustic field which can satisfy automatically infinity radiation condition .

在建立相互作用模型时，将整个下部区域划分为桩土区、近土区和地基无限域远土区。

When we establish an interaction model of the oval digester , we divide the entire lower part region into three parts : the pile soil area , soil area nearby and soil area far away among the ground infinite territory .

结果表明，用这一模型来离散无限域的远场，特别是研究动力问题，具有较好的经济性和可靠性。

The result shows that model is economic and credible in the discretization of far-field of infinite domain , especially to researching for dynamic problems .

将半无限地基分为远域和近域，分别用超参映射动力无穷元和普通有限元模拟，提出一种上部结构与地基之间的耦合单元，从而建立了该系统的数值分析模型。

In this paper , the semi infinite foundation is divided into far and near domains , and they are simulated by the super parameter mapping dynamic infinite element and the ordinary finite element respectively .

采用无限元更有效地反映地基无限域的远场效应；

This paper adopts the contact element to consider the dislocated slippage and tensile crack , and uses the infinite element to reflect the far field effect of the groundsill infinite region more efficiently .