Experimental research on fatigue cumulative damage of concrete under cyclic tension-compression with constant confined stress 定侧压混凝土双轴拉-压疲劳累积损伤试验研究
A study on the cumulative fatigue damage of plain concrete under biaxial compression is conducted basing on the experiments of concrete specimens subjected to constant and variable amplitude cyclic loading with constant confined pressure. 本文在对混凝土立方体试件进行定侧压下双轴等幅与变幅抗压疲劳试验的基础上,研究了素混凝土双轴抗压疲劳累积损伤性能。
In water solution, cumulative stability constant β 2 of title complex is 1017, and it means that there was strong coordinate-covalent bond between ligand and Pd ( II) ion. 水溶液中配合物的累积稳定常数为1017数量级,表明配体与离子形成较强的配位共价键。
By dividing the exposal-tested color-difference curves of cyan, magenta and yellow cumulative dye with constant steps, a large number of samples distributing relatively regularly in CIE Lab color space were generated. 通过等间距分割由曝光实验测得的青、品、黄染料累积色差曲线,构建了在CIELAB色域空间内分布相对规则的大容量学习样本。
According to Fick diffusion law, the growth of the relationship of IMC thickness and the square root of cumulative test time is roughly linear, so the diffusion coefficient, and the diffusion constant and activation energy are calculated by the means of fitting. 根据Fick扩散定律和分子动力学方程,IMC的生长厚度与累积测试时间的平方根大致呈线性关系,故拟合计算出了与传统热疲劳结果近似的扩散系数,扩散常数和活化能。
Using the Buy-and-hold abnormal return, Cumulative abnormal returns and Fama-French three-factor model as three indicators constant, by comparing the approval system and approval system under the IPO pricing efficiency, to illustrate the affection of the Stock Offering System reform on the efficiency of IPO pricing. 采用了买入持有超额收益、累计超额收益和Fama-French三因素模型的常数项三个指标,通过对比审批制和核准制下的新股发行定价效率,来说明发行制度改革对IPO定价效率的作用。