6.1 狭义相对论的基本概念和主要结论 6.2 匀速运动点电荷的电场 6.3 匀速运动点电荷的磁场 6.4 线分布的运动电荷的场 6.5 电场与磁场的相对论变换 6.6 关于动生电动势与感生电动势的相对性问题

研究问题：从基本的静电现象出发，讨论静电场的描写方法和基本规律，进而建立静电场的基本方程式

Heat Transfer Su Yongkang School of Mechanical Engineering Internal Flow Heat Transfer Where we’ve been …… Introduction to internal flow, basic concepts, energy balance

Heat Transfer Su Yongkang School of Mechanical EngineeringInternal Flow Heat Transfer Where we’ve been …… Introduction to internal flow, boundary layer growth, entry effects Where we’re going:

Heat Transfer Su Yongkang School of Mechanical Engineering External Flow: Other Shapes Where we’ve been …… Empirical correlations and analytical solutions Where we’re going: Applications to other shapes (cylinders and spheres)

Heat Transfer Su Yongkang School of Mechanical Engineering External Flow: Flat Plate Where we’ve been …… General overview of the convection transfer equations. Developed the key non-dimensional parameters used to characterize the boundary layer flow and convective heat and mass transfer

Heat Transfer Su Yongkang School of Mechanical Engineering Boundary Layer Similarity Parameters The boundary layer equations (velocity, mass, energy continuity) represent low speed, forced convection flow

Heat Transfer Su Yongkang School of Mechanical Engineering CH6 – INTRODUCTION Where we’ve been …… Basic Conduction Heat Transfer Finished Fourier’s law:

抗冲强度（冲击强度）是材料突然受到冲击而断裂时，每单位横截面上材料可 吸收的能量的量度。它反映材料抗冲击作用的能力，是一个衡量材料韧性的指标。 冲击强度小，材料较脆

聚合物材料在拉力作用下的应力-应变测试是一种广泛使用的最基础的力学试 验。聚合物的应力-应变曲线提供力学行为的许多重要线索及表征参数（杨氏模量、 屈服应力、屈服伸长率、破坏应力、极限伸长率、断裂能等）以评价材料抵抗载荷， 抵抗变形和吸收能量的性质优劣；从宽广的试验温度和试验速度范围内测得的应力 -应变曲线有助于判断聚合物材料的强弱、软硬、韧脆和粗略估算聚合物所处的状况 与拉伸取向、结晶过程，并为设计和应用部门选用最佳材料提供科学依据