查询词典 finite difference approximation

This study performed the three-dimensional nonlinear finite element analyses using a general purpose finite element program ABAQUS to simulate the structural behaviors of two full-scale H-beam to box-column subassemblage specimens in fire test. In the experimental program of this study, the two specimens were tested at elevated temperatures in the furnace and under the specified constant loadings, and the moment connections of the two specimens were made of fire-resistant steel and normal steel respectively for comparison.

本研究针对两支实尺寸H型梁-箱形柱接合之耐火钢与普通钢弯矩接头试体受定载加温的火害行为进行ABAQUS有限元素数值模拟，所得之数值结果分别与两支试体在大型高温炉中所进行的火害试验结果比对，以验证有限元素数值模型之正确性。

To enhance computational efficiency, mechanical subelement model is incorporated, for simulating material hardening properties, in the hybrid/mixed finite element analysis of finite deformation problems.

为了提高计算效率，本文首次把力学子单元模型引入有限变形杂交/混合有限元分析工作，用以简化弹塑性本构模型。数值分析表明，在有限变形杂交/混合有限元分析工作中使用该模型，能有效地提高计算效率。

Basing on a modified Reissner-type incremental variational principle in conjunction with mechanical subelement model and updated Langrangian description, a finite-deformation hybrid/ mixed finite element formulation is presented.

根据修正的Reissner变分原理，采用Updated Lagrange描述，建立了基于力学子单元模型的增量型大变形杂交/混合有限元列式方法。

In this paper, material properties of the segment of the porous metal-bonded diamond grinding wheel were researched by finite element simulation. Segments were manufactured according to the design result and their elastic modulus was measured. The key points are as follows: The influence of the porosity on the elastic modulus was analyzed through a finite element method. In the FEM model, the design variable only includes the porosity, and the tetrakaidecahedron model is applied as the microstructure model of porous metal matrix. The corresponding porosity was decided in order to meet the requirement of the elastic modulus.

本文利用有限元软件对多孔金属结合剂金刚石砂轮节块的材料性能进行了数值模拟计算，依设计结果制备了节块试样，并测试了节块的弹性模量，主要内容有： 1、充分借鉴多孔材料结构设计和分析的方法，以十四面体模型为多孔金属胎体的微观结构模型，以孔隙率为设计变量，通过有限元分析，计算出满足一定弹性模量要求的多孔金属胎体的孔隙率范围。

It is not so, as every player stakes a certainty to gain an uncertainty, and yet he stakes a finite certainty to gain a finite uncertainty, without transgressing against reason.

并不是说，每个赌徒为了得到不确定性而付出确定性；而是说，他要在不违反理性的情况下，为得到有限的不确定性而付出有限的确定性。

As a application of this theory, we discussed the interpolation problems in which the nodes are ununiform rectanglar grids in real space. We gave the lowest interpolation bases of nodes in rectanglar and sidestep-shaped area. Another application is for finite elements theory. We mainly discussed finite elements of Hermite-Birkhoff type interpolation and gave a new algorithms for a interpolation bases.

作为上述理论的具体应用，我们一方面讨论了插值节点为实空间上的非均匀矩形格点的插值问题，主要给出了矩形区域和阶梯形区域中格点上插值问题的按序最低的插值基的一般公式，另一方面我们研究了多元插值在有限元中的应用，主要是针对Hermite-Birkhoff型插值的有限元给出了计算插值基函数的算法。

The major types of finite subordinate clause are relative clause, adverbial clause and nominal clause.The major types of non—finite subordinate clause are infinitive clause,—ing participle clause and —ed participle clause and verbless clause.

非限定从属分句的形式有不定式分句，以—ing 结尾的分词分句，以—ed 结尾的分词分句和无动词分句 Chapter 12 Relative Clause 关系分句 31 难点，一，难点，重点 1。

In this paper, numerical computations are made on the scattering of ultrasonic pulse waves with different centroid frequencies of 100 kHz,500 kHz and 1 MHz in fluid-filled finite-length perforation by using Finite Element Method,where three kinds of models of perforation bottom, I.E., flat bottom, stepped bottom and acuminated bottom,are assumed to simulate the practical bottoms of perforation.

乔文孝，杜光升。射孔孔眼中散射超声脉冲波的FEM模拟。测井技术，2001，25（2）：96～100 采用有限元素法，分别数值计算了平底孔道、台阶式孔道和尖劈状孔道等3种孔眼模型中不同中心频率(100 kHz、500kHz、1 MHz)的散射超声脉冲波。

Aiming at the ballasted continues welded track and turnout structure on the normal embankment, stability analysis model of continues welded track is established by finite element method to avoid the disadvantages of traditional methods, compile the finite element analysis program and make comprehensive analysis on the lateral deformation and vibrational characteristics caused by temperature force of the continues welded track and turnout str ucture.

本文针对有砟轨道普通路基上无缝线路及无缝道岔轨道结构，运用有限元法，建立了三维无缝线路稳定性分析模型，避免了传统理论假设过多的弊端，基于有限元分析软件，编写了有限元分析程序，对无缝线路和无缝道岔的横向变形和横向振动特性进行了全面研究，主要研究内容有：1。

The result is compared with finite element method's result also. The paper's work has richened the finite formulation calculation technology for eddy current field.

该文的工作，丰富和完善了有限公式理论在涡流场方面的计算技术为在其他工程问题上的进一步应用打下了基础。

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！