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1)  cyclic duration factor
周期持续系数
2)  stress cycle endured
持续应力周期
3)  period of continuous exercise
锻炼持续周期
1.
Influence of exercise amount on subjective happiness and psychological health is made mainly through period of continuous exercise which works as a decisive factor.
运动量主要是通过锻炼持续周期对教师主观幸福感和心理健康产生影响,锻炼持续周期是影响高校教师主观幸福感和心理健康的决定性因素。
4)  periodic coefficients
周期系数
1.
Hopf-Flip bifurcations of a two-degree-of-freedom mechanical system with periodic coefficients;
一类周期系数力学系统的Hopf-Flip分岔
2.
Global asymptotic stability for delay difference equations with periodic coefficients;
具周期系数时滞差分方程的全局渐近稳定性
3.
The coupled linear partial differential equations with periodic coefficients are derived using the Newton method.
利用牛顿法推导了带周期系数的线性偏微分方程;用Galerkin有限元素法离散该方程的空间变量;运用基于Floquet理论的Hsu近似法及坐标变换——常系数近似法处理周期系数。
5)  periodic coefficient
周期系数
1.
Borg s Theorem is an important theorem which determine the stability of second order linear differential equation with periodic coefficient, and it is impossible to improve this Theorem in some significance.
Borg定理是判定周期系数二阶线性微分方程稳定的一个重要定理,这个定理在一定意义下是不可改进的。
2.
The stability of two order linear differential equation with periodic coefficient is determined by its characteristic exponent.
周期系数二阶线性方程的稳定性由其特征指数确定,本文给出一种由系数直接估计特征指数的方法,简单且实用。
3.
Two numerical methods for solving time varying periodic coefficient Lyapunov differential equations are proposed,both of which are based on Fourier series expanding and the precise integration method.
提出了基于Fourier级数展开与精细积分来求解线性时变周期系数Lyapunov微分方程的数值方法。
6)  sustainable coefficient
可持续系数
补充资料:疲劳应力周期比
分子式:
CAS号:

性质:设试样在振幅为S1的循环应力作用下,其疲劳寿命为N2…若循环应力S1作用于试样的循环次数为n1(n1<N1);循环应力S2作用于试样的循环次数n2(n2<N2)…则当有时,试样发生疲劳破裂。即称为疲劳应力周期比。它表示振幅为S的循环n次后,使试样疲劳寿命降低的比率。常用这个方法来估计材料在非恒定振幅的循环应力作用下的疲劳寿命。不过误差是较大的。

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