以下为句子列表：
英文: 74 explores time-dependent quantum mechanics and spectroscopy. Topics covered include: perturbation theory, two-level systems, light-matter interactions, relaxation in quantum systems, correlation functions and linear response theory, and nonlinear spectr
中文: 74探索与时间相关的量子力学与光谱学，课题包含：微扰理论、双能级系统、光与物质之作用、量子系统的松弛过程、相关函数与线性响应理论，以及非线性光谱学。
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英文: Abstract: Based on the fundamental theory of computation of the cable-prestressed steel trusses established in paper［1］,the iterative perturbation formulas which inversively determine the stiffenesses of elements of steel trusses and cables with the restr
中文: 文摘:基于文［1］所建立的拉索式予应力钢桁架基本计算理论，根据矩阵摄动原理进一步给出了以竖向结点位移为约束反演确定任意布索张拉予应力钢桁架单元刚度和拉索刚度的摄动迭代公式。
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英文: Abstract: For the linear weighted regression model, influence measure of covariance matr ix perturbation and estimate efficiency of regression parameter have been analyz ed on the basis of the regression diagnosis, and the lower bounds of the two eff icie
中文: 文摘:针对线性加权回归模型，从统计诊断的角度分析了协方差阵扰动的影响度量和回归系数的估计效率，并给出了2种效率的下界.
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英文: Abstract: In this paper,using the improved L-P method and the interpolation perturbation method,the authors seek to solve a class of the damped strongly nonlinear free oscillation problems.Its first order approximate solution is obtained.
中文: 文摘:本文用插值摄动法及改进的L-P法相结合的方法求解了一类有阻尼的强非线性自由振动问题，得到了一级近似解。
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英文: After giving their approximate expressions, we focus on the space-time distribution of perturbation of magnetic field.
中文: 在求得其近似解后，着重讨论其扰动磁场的时空分布。
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