查询词典 mechanics

From the point of view of inverse problems in mechanics, two trains of thought for solving ICS/IBS computative problems, i. e: by means of intelligence computation method without geometrical modeling and by the aid of finite element inverse analysis method with geometrical modeling, are expounded.

从力学反问题的角度出发，阐述了智能桥梁结构的智能计算问题的两种思路——无模型力学反问题的计算智能法解决思路以及有模型力学反问题的有限元法解决思路。

The second part(Chapter 4,Chapter 5 and Chapter 6)is devoted to freeboundary problems(inverse boundary value problems or geometric inverse prob-lems)for elliptic systems of partial differential equations in continuum mechanics.

第二部分(即第四章、第五章、第六章)讨论力学中椭圆型方程组的自由边界问题(也称逆边值问题或几何反问题)及数值分析，主要涉及到渗流与气体动力学中的一些问题。

As applications, the symmetric structure of two real systems in mechanics and medicine is studied with discussions on their reachability, controllability, realization and invertibility.

作为应用，本文还研究了力学和医学上的两个实际系统的对称性结构与可达性，可控性，实现及可逆性等问题。

This article, in the term of Eigenfunction method of Quantum mechanics, illustrated indetail the Irreducible representation (Irreducible representation marices) of Reprensentation group of computatile space group and the disposition of phase factor of Irreducible representation basis and the disposition method of plase factor of clebsch-Gordaw coefficients in the process of the computation.

利用量力学中的本征函数法详细讨论计算空间群的表象群的不可约表示及IR基时位的处理，以及讨论了C—G系数的计算中的位的处理方法。

The origin of the irreversibility observed in nature is one of the oldest and most intriguing problems in statistical mechanics.

不可逆性的起源是统计力学中一个古老而重要的问题。

We feel that fracture mechanics should be dated from 1948, the year of publication of the first of Irwin's classic papers.

我们认为断裂力学应该从1948年开始，在这一年里，Irwin发表了他的第一篇经典文章。

As a nontechnical outline, we here mention that quantum mechanics and chemistry have a structure which is linear (i.e., only dependent on the first power of the wavefunctions), local (i.e., solely defined for a finite set of isolated points) and potential (i.e., only admitting action-at-a-distance interactions derivable rom a potential energy).

作为一种非技术性的概括，我们在此提到量子力学和化学所具有的结构，是线性的〔即，仅随波函数的一次幕而定〕，局部的〔即，仅由有限副孤立点定义〕和潜能的〔即，仅承认一定距离相互作用可推论罗姆的潜能〕。

In this paper, based on piezoelectric ceramic, composite and experimental mechanics theories, a kind of 1-3 orthogonal anisotropic PCM sensor is developed, and the sensing principle is analyzed to describe sensor behaviors. In order to determine strain and stress on isotropic or orthogonal anisotropic component surface, the relationships between strain and stress are established. The experimental research on 1-3 OAPCM sensor is carried out in uniaxial and biaxial stress states.

本文在压电材料基本理论、复合材料设计方法和实验力学的基础上，构造了一种1-3型正交异性压电复合材料传感元件，探讨了它的传感原理，推导了该种元件的传感方程和用于各向同性材料／正交各向异性材料构件表面测量的应力－应变关系，并在单向和双向应力状态下，进行了实验研究。

In chapter six, A finite element model to evaluate the mechanics properties of thin wall structure is put forwards. The 4-node quadrilateral Hughes-Liu shell element with five through-the-thickness integration points is employed. The material is assumed to satisfy the elastic-plastic yield condition with isotropic hardening. The single surface contact algorithm is taken to deal with the contact searching. The priori stabilization procedures for the numerical control of the hourglass instability and the penalty method for the evaluation of contact force are used. The classical Coulomb law of friction is employed to evaluate the friction force.

第六章采用法向方向5点积分的4节点Hughes-Liu壳单元，前置参数法砂漏控制技术，等向强化弹塑性材料模型，分步增量应力回映方法，一体化接触搜寻算法，罚参数接触力计算方法及经典摩擦定律，建立了一种计算受冲薄壁结构大变形力学特性计算的有限元模型，通过对汽车A传动轴及汽车纵向方形吸能梁的大变形力学特性分析，验证了该有限元模型的正确性。

In this paper, by using iteration and variation method, the perturbation problem in quantum mechanics will be sloved.

如果满足用微扰方法求解问题的条件，似乎问题已经解决了(见文献[1])。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐