查询词典 calculus of finite differences

In this paper, series of Finite Element Analysis and study on Bus Body Frame are preceded. Based on the research on tire done before, a method of using Finite Element Method to study bus dynamic performance is discussed fundamentally.

本文以客车车身骨架为主要对象，针对某客车全承载式车身进行有限元分析与研究，并结合本课题组前期对轮胎所作的一些研究工作，对采用有限元方法研究整车动态性能作了初步探讨。

Where ,if the set X is finite ,the set Y is also finite .

这里，如果 X 是有限的，那么 Y 也是有限的。

"From now on I will consider language to be a set of senterces,each finite in length and constructed out of a finite set of elements."

"从现在开始，我要把语言看成是句子的集合，每个句子均有一定的长度，并由有限的成分集合所构成。"

Hence, the Cabala teaches that the infinite light contracted and retired its infinityin order that the finite might become existent; or, in other words, the infinite appears as the sum of finite things.

因此， Cabala教导我们无限的合同，并根据其退休infinityin为了使有限的存在成为可能；或者，换句话说，无限出现的总和有限的东西。

An in finite series that results in a finite sum is said to converge. One that does not, diverges.

一个无穷级数可求得和便称为收敛级数，若否，则称为发散级数。

K_ωby a finite sum of finite products of Toeplitz operators on L_α~2, and define the operator L_ω.

K_w表示为有限个Toeputz算子乘积的有限和形式，同时定义了L_a~2(D~n~⊥上的算子L_w。

In chapter 2, a finite element model for the composite sandwich plates is developed, based on the Zig-Zag deformation assumption and the first order shear deformation theory, and the finite element buckling analysis governing equations for the plates under mechanical, thermal and/or thermal-mechanical mixed loads are deduced respectively. By Von-Karman nonlinear deformation relations and Total Lagrange formulation, an incremental governing equation for postbuckling analysis is established and a corresponding effective computational scheme is presented..

第二章首先建立了基于Zig-Zag截面变形假定和Mindlin一阶剪切理论的夹层板有限元分析模型，分别推导了夹层板机械力、热载和热—机械力耦合屈曲分析的有限元列式和相应的屈曲前以及屈曲临界状态的平衡方程，基于Von-Karman大挠度理论，采用增量形式的全局lagrangian法推导了复合材料夹层板增量形式的几何非线性有限元离散平衡方程，给出了一种有效的非线性平衡方程的迭代求解格式。

The following is the main works of the paper.1 The weight and the center of weight of the whole hull, analysis by statics the weight of steel, the equipment, oil, water, crew and cargoes etc., conclude a method of calculating the weight and the center of weight of the whole hull,2 Work out the series of formula of distributing the water pressure of wave to the corresponding nodes on the plate, conclude a method of calculating the flotage and the center of the flotage,3 Analysis the method of adjusting the equilibrium of the hull, the finite element module of the hull, and the character of the linetype, by ship statics principle, work out a series of formula of adjusting longitudinal slant, preliminarily confirm the parameter and the range,4 Program in FORTRAN, and link into ANSYS, for auto-loading when analyzing the whole hull by the FEA,5 Make the finite element module of a real hull, calculate the weight and the center of the weight, the flotage and the center of the flotage, compare the result of manual calculation with the computed result, analysis the deviation of the program.

3通过分析船舶常用浮态调整方法、船体结构有限元模型和船体线型特征，运用船舶静力学原理，推导船舶浮态纵倾调整公式，分析了基于船舶结构有限元模型的纵倾浮态调整方法和初步探讨了纵倾浮态调整中的参数确定方法以及初步确定这些参数的取值范围。 4用本文推导的计算方法和公式开发FORTRAN程序，并编译连接到有限元软件ANSYS中，用于进行整船结构有限元分析时自动加载计算。

This course will introduction two numerical methods on fluid mechanics mainly: finite difference method and finite cell method.

本课程重点介绍流体力学的两大数值方法：有限差分法和有限单元法。

Finite element model is made with finite element analysis software and the dynamic characteristics of an existing footbridge are analyzed.

针对一出现较大振动的人行天桥，利用有限元分析软件建立了计算模型并进行了动力特性分析，同时对结构进行了动力测试。

I go to school at night.

我是上上学。

Clear Tip Nasal Aspirator: A soft time and gentle suction action makes removing excess mucus easy.

鼻吸明确提示：一个柔软的时间和温柔吸力行动使消除过剩的粘液容易。