Which of the following expressions most ac curately and simply represents the comple mentary strain energy density Uc of a linear elastic material?

一、概述 generalization 二、经典电泳分析法 traditional electrophoresis 三、高效毛细管电泳分析 法 high performance capillary electrophoresis

Extend definition to material bodies: total work is the addition of the work done on all particles by forces distributed over the volume W by forces distributed over the surface t·udS

1.耗费时间长 2.效率不高 3.溶剂消耗量较大，成本较高 4.难于实现自动化 5.不够“绿色

Which of the following expressions represents the rate of work done by the stresses during the deformation of a body of an arbitrary material?

一、微波能介绍 二、微波化学的发展历程

The following stress-strain curves were obtained for dif- ferent materials subjecting the specimen to the loading path(a, b, c, d ). Which one(s) of them correspond to elas- tic material(s)

我们先从一种最简单、最容易理解的图形开始分析技术形态。横线或称盘局,就是图形 之中最基本的形状。图表虽然浅显又简单但横线的含义与启示却十分重要,能够确认某种投 资是横线走势,密切观察,一但发现盘局发生变化,把握买入卖出讯号,利润可能以数倍计 图1中的阿城钢铁股价,由98年9月至12月初的走势基本呈一条横线的形状,价位在 4.5元左右,每日波动幅度不超过两三个价位,与12月中旬起逐步飙升至18元的行情不可 同日而语。9月至12月的图形形状就是“横线”,技术上又称盘局

16.21 Techniques of Structural Analysis and sig Spring 2003 Unit #4- Thermodynamics Principles First Law of Thermodynamics

For the uniform state of plane strain shown in the fig ure,which one(s) of the following statement(s) is(are valid?(Assume Poisson's ratio v+0)