查询词典 perturbation function

Using the two-stream fluid model, the linear dispersion relation is derived assuming a two-dimensional spatial geometry. Two cases are considered, one is that the 2D spatial geometry is defined by the plane containing the two counterstreaming electron populations and the perturbation wave vector , and the other is that the geometry is defined by the plane being vertical to the two counterstreaming electron populations .

对高能束流和电子回流构成的双流系统，建立冷等离子体流体模型，采用简正模分析方法，分别考虑扰动波矢在平行于电流传播方向的平面上和在垂直于电流传播方向的平面上这两种情况，推导了不稳定性的色散关系。

Aimed at the large deformation problem of industry cooling tower shell, the mathematical model for the random response of rotational shell under the external random excitation is established by statistic perturbation method.

针对工业冷却塔结构大变形的随机动力问题，利用统计摄动方法，考虑旋转壳法向几何非线性及随机激励作用，建立了旋转壳的非线性随机动力响应数学模型。

Employing the inverse perturbation method , we have tackled the problem of optimum design of the machine tool spindle.

用逆摄动法进行机床主轴的动力优化设计。

Unfortunately, however, the simple WKB approximation may be inapplicable to steep-sided profiles (e.g., proton exchanged or epitaxially grown) where, for these almost square cases, it is more appropriate to use a perturbation theory approach.

但不幸的是，简单的WKB近似可能不适用于陡峭片面概况情况下，这些几乎平方米情况下，它更适合使用微扰理论方法。

And this course of change of water level of steam dome caused to perturbation of water flow can pass experiment test and receive the accurate mathematics model with data processing , can design the routine controller to control like this, and can reach very good result.

而给水流量的扰动造成的汽包水位变化这一过程可以通过实验测试和数据处理得到精确的数学模型，这样就能够设计常规控制器来控制，并能达到很好的效果。

And this course of change of water level of steam dome caused to perturbation of water flow can pass experiment test and receive the accurate mathematics model with data processing , can design the routine controller to control like this, and can reach very good result.

并通过常规三冲量PID仿真与模糊控制仿真进行了一系列对照，结果证明对于那些过程复杂，具有时变性和明显滞后以及难以取得精确的数学模型的系统，模糊控制比传统的三冲量控制更容易实现全自动并且控制作用相当有效。

The solution of perturbation pressure is used to calculate air bearing's stiffness and damping coefficients.

采用非结构三角形网格的有限元法求解压强摄动方程，并计算气膜刚度系数和阻尼系数。

When it is under certain perturbation, a quasi-elliptic response with transmission zeros to improve the transition can be obtained using the transmission zero technique given in the dissertation. Further, a multi-mode resonator composed of a half wavelength resonator loaded with two shunt series LC circuit is also investigated intensive.

本文提出了一种新型准集总元件谐振器，它既具有结构紧凑的优点，又能够引入传输零点构成准椭圆特性响应；本文也提出了一种由半波长传输线加入微扰构成的双模谐振器，并对它的传输零点技术做了全面系统的研究，这种双模谐振器相比传统的环形双模谐振器有更加紧凑的尺寸；本文提出了一种由半波长传输线加载并联串联LC电路构成的多模谐振器并对其在宽带滤波器的应用进行了研究；论文对一种复合谐振器及其在双通带滤波器设计中的应用进行了研究。

In her view, is too uncertain policy environment lacking the support of the legal deficiencies austerity,"the rich have the right to waste, no one管不着," according to the law should not make the appropriate and effective supervision and management, lack of shock perturbation force.

在她看来，是十分不确定的政策环境缺乏的紧缩法律缺陷的支持，&富人的权利，废物，没有人管不着，&按照法律不应该作出适当和有效的监督管理，缺乏冲击扰动力量。

Based on one-cycle control having such merits as anti-perturbation of source, fast dynamic response, robustness, constant frequency, but when converter works in light load its power factor becomes very poor. The modified OCC was proposed, adopting feed-forward compensation control improves influence of power factor at light load, further study adopting independence saw tooth wave completely eliminate influence of power factor at light load.

基于单周期控制有源前端变换器具有抗电源扰动能力强、动态响应快、鲁棒性强、恒频控制等优点，但在轻载时变换器的功率因数变差，提出了改进OCC策略，采用前馈补偿控制改善轻载时对功率因数的影响，进一步研究采用独立的锯齿波电路完全消除轻载时对功率因数的影响，建立改进OCCAFE变换器的数学模型。

Effective local search tactics reaches local searchers when they are ready to buy - with every way that it is possible for them to buy from you.

有效的地方搜索策略达到当地的搜索，当他们准备购买-以各种方式，这是他们有可能从您那里进行购买。

The first two are periodic sentences for their beginnings; and the fifth and the last are also periodic sentences each for the embedding of a parenthetic structure.

1960年代中后期，当战后女权主义和当时的许多其他抗议运动在西欧和北美发展成某种势力时，性别的概念演绎成补充和延伸生物性别差异的概念。