1.掌握稳定性的基本概念与用平衡方法确定的压杆分叉荷载。 2.掌握柔度的概念与大、中、小柔度杆的区分、临界应力的计算。 3.了解压杆失效和稳定性设计准则

Programming Languages As difficult to discuss rationally as religion or politics. Prone to extreme statements devoid of data. Examples: \It is practically impossible to teach good programming to students that have had a prior exposure to BASIC; as potential programmers they are mentally mutilated beyond hope of regeneration.\(Dijkstra)

Interactive Complexity Complexity is a moving target The underlying factor is intellectual manageability 1. A simple\system has a small number of unknowns in its interactions within the system and with its environment 2. A system is intellectually unmanageable when the level of interactions reaches the point where they cannot be thoroughly

1. When you can measure what you are speaking about, and can express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowleage is of a meagre and unsatisfactory kind: It may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the stage of science. Lord Kelvin, a physicist

（一）岩体边坡破坏的主要类型： 平面滑动条件： （1）岩体构造十分规则； （2）发生滑动的平面与• 边坡走向平行或近于• 平行； （3）滑动平面的倾角小于坡面角；即f>p ； （4）滑动平面的倾角大于

本章介绍弹性变形势能,并将虚位移原理、势能驻值原理及最小势能原理用于变形体。本章重点介绍单位载荷法,这是一种用能量原理求位移的方法,是一种很简单实用方法

A Testing EXercise (From Glenford Myers: The Art of Software Testing A program reads three integer values from a card. The three values are interpreted as representing the lengths of the sides of a triangle. The program prints a message that states whether the triangle is scalene iso

下面分析二种典型的固结不排水试验应力路径 (1) 常规三轴试验应力路径，先在均匀压力下固结此点，然后保持3不变，不排水下增加1至破坏，TSP线为与横轴成４５°斜线，若此时孔隙水应力为u,量得CB= u ,连接AC 点得ESP线

土的三类常用的试验方法 （一） 三轴不固结不排水剪切试验（ UU试验） 饱和土特点： 孔隙比和含水量不变，有效应力园是唯一的； 不排水强度仅与先期固结压力有关； Cu=0.5(1- 3)动画4-1 三轴不固结不排水

 水平角测量原理 The Meterage of horizontal Angle Principle  J6型光学经纬仪 J6 Optics Theodolite  水平角测量 The Meterage of Horizontal Angle  竖直角测量 The Meterage of Erect Angle  经纬仪的检验与校正 The Inspection and Emendation of Theodolite  经纬仪测角注意事项 The Notice of Measured Angle by Theodolite