查询词典 perturbation function

Time domain perturbation method ; Time-varying photoconductivity ; GHz pulse

时域微扰法；时变电导； GHz脉冲

According to the plane cross section assumption, configuration of a rod is expressed as a history of the cross section with arc coordinate. A special solution which stands for equilibrium in straight line state is obtained from differential equilibrium equation. Linear perturbation equation is derived and its general solution is obtained in which the integral constants are determined by constrained conditions at two ends of the rod. The condition of existence of non zero solution of the integral constants gives to the Greenhill formula of exact elastic rod model, which shows that the boundary of stable area is a closed curve and of symmetry, and inference of shearable and extensible to stability of the rod is depend on three factors: difference between flexibility of shear and extension of a section of the rod, bending stiffness and the length of the rod.

基于平面截面假定，弹性杆的位形表达为截面的弧坐标历程，根据平衡微分方程得到了两端受力螺旋作用时的直线平衡特解，导出了线性化扰动方程及其通解，积分常数根据两端铰支时的边界条件确定，并根据其存在非零解的条件得到弹性直杆精确模型的Greenhill公式，表明稳定域为一对称的封闭区域，拉/压和剪切对稳定性的影响取决于：拉/压柔度与剪切柔度之差，抗弯刚度和杆长这三个因素

Meanwhile, we also provide methods for computing the weighted polar decomposition, and study error bounds for the approximate generalized positive semidefinite polar factor and perturbation bounds for weighted polar decomposition in various norms.

针对这个新的矩阵分解，我们证明了其唯一性定理，给出了其唯一性条件，讨论了其极因子的最佳逼近性质；同时，我们还探讨了矩阵加权极分解的计算问题，研究了由迭代算法引起的极因子的误差界，极因子在各种范数下的各种形式的扰动界等。

Lastly we consider the perturbation bound on Hermitian positive semidefinte factors for unitrary polar decomposition (see 5.1), whichimprove and extend the corresponding results in other papers.

第五章讨论了在矩阵酉极分解中Hermite半正定因子的扰动(见§5.1)，对以往的结果做了改进。

It is verified first that Buckingham and Parlett's perturbation theory on the light-induced energy change of a polarizable atom or molecule is consistent with that of the optical-pumping theory.

鉴于已有的理论孤立地研究Warren等人的实验结果，忽视了与ac Stark效应的关联，我们第一次理论证明了：Buckingham与Parlett的关于在光场的作用下原子和分子的能级改变的基本公式，实际上与光抽运过程中能级光移动的理论相一致。

This paper deals with the existence and nonexistence of solutions for a critical semilinear polyharmonic equation with a non-negative perturbation.

李爱翠 ，黄力民，曾宪忠讨论了带非负扰动的临界非齐次多重调和方程多解存在性和非存在性。

An arbitrary perturbation of generalized Schur complement for positive semidefinite matrix is studied.

得到了原已有文献给出的Hermitian半正定矩阵的Styan矩阵不等式的逆向表达式。

Chaos perturbation is used to improve selection strategy to avoid precocity and stagnation.

在基本蚁群算法的概率转移中引入混沌扰动的策略，以使解易于跳出局部极值区间，加快收敛速度。

Reliable estimation of the perturbation corrections, which account for the presence of the chamber inside the water phantom, allows an accurate determination of absorbed dose.

经过比对的过程，将此游离腔定为日后钴60水中剂量校验的原级标准件。

Probability perturbation finite element method for response analysis of multi-degree-of-freedom nonlinear vibration systems with random parameters

非线性因素会对系统解耦产生影响，因此工程实际中的非线性隔振系统一般为多自由度系统，同时，船舶机械隔振系统的基座应视为具有一定机械阻抗的弹性体。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。