杨氏模量与温度关系的实验研究

Through Experiments to Explore the Young's Modulus and Temperature

以杨氏模量测定实验和线膨胀系数测定实验为基础,通过改进实现方法,即采用现有线膨胀系数测定实验的温度控制系统来精确控制待测材料的温度,测定待测材料在不同温度下的杨氏模量,作杨氏模量与温度的关系图,结果表明杨氏模量的大小与温度变化成线性关系。

The distribution of topic - web group consisting of the high degree of correlation topic websites shows s^g- nificant ecological characteristics, which is taken as the theoretical basis. Based on the studying and analyzing the evaluation indexes of topic webs and the relationship between them, using link analysis method, this paper presents evaluation indexes, including usefulness, similarity, degression and influence, and so on. According to the evalua- tion indexes, the paper designs the algorithm of topic - web group discovery on principle of breadth priority. The results show that the algorithm is valid and feasible.