Chapter 3 Kinematics I: rectilinear motion Motion implies change, and it is change make life-and physics-visible and interesting. Kinematics is the theory about the description of motion. Physical theories are creations of the human intellect; they must be invented rather than discovered

4-1平面弯曲的概念及梁的计算简图 4-2梁的剪力和弯矩 4-3剪力方程和弯矩方程·剪力图和弯矩图 4-4剪力、弯矩与分布荷载集度间的关系及应用 4-5按叠加原理作弯矩图 4-6平面刚架和曲杆的内力图

6-1概述 6-2梁的挠曲线近似微分方程及其积分 6-3求梁的挠度与转角的共轭梁法 6-4按叠加原理求梁的挠度与转角 6-5梁的刚度校核 6-6梁内的弯曲应变能 6-7简单超静定梁的求解方法 6-8如何提高梁的承载能力

8-1强度理论的概念 8-2四个强度理论及其相当应力 8-3莫尔强度理论及其相当应力 8-4强度理论的应用

10-1压杆稳定性的概念 10-2细长压杆临界力的欧拉公式 10-3超过比例极限时压杆的临界应力 10-4压杆的稳定校核及其合理截面

HOME BACK FORWARD! PRINT SEARCH EXI INTRODUCTION Major soils of the world ORGANIC SOILS Mineral soils World Reference base for soil resources: atlas

一.为什么要了解土壤有机质? 二土壤有机质是什么?有多少? 三.土壤中有机质如何转化? 四.土壤腐殖质如何存在? 五.土壤腐殖质有什么作用?如何更好地发挥这种作用?

Section 1 The types of soil water and measuring soil moisture a

Section 1 Soil colloidal surface nature Surface types of the soil colloid (一) Siloxane surface (二) Hydrous oxide surface (三)Organic matter surface

1. Nutritional type of microbe? 1. 1 A distinction should be made between the Heterotrophic and autotrophic Organic compounds .2 Carbon source Carbon dioxide Organic molecule a1.3 Energy source Light or chemistry energy