查询词典 variation method

The principle of this method is T_c measure the variation of susceptibility of magnetic materials with temperature near Curie point.

新方法的原理是在弱交流场下，测量磁性材料的磁化率κ随温度的变化，从而确定它的居里点。

It is therefore considered that magnetic susceptibility is an effective indicator for variation in heavy metal concentrations, and may serve as a new method for studying heavy metal pollution.

磁化率是重金属含量变化的一个有效指数，它的研究为重金属污染研究提供了一个新的方法。

The ancient kin-novels deeply influence the composition of modern novelists in many aspects: the kin identity of authors, genre selection, focusable object, narrative strategy, narrative structure, arrangement method, art spirit, tragedy spirit and so on. While modern kin-novels, on the basis of absorbing the tradition, develop the ancient kin-novels in the following aspects: enlarging the component of characters, continuity of character\'s fate, change of the end and the exploration of character\'s psychology and the variation of images and so on. The kin novels with familiar genre whether it is ancient or modern, will appear special stipulation that is resemble and matchable with kin-genre. This Paper mainly analyses it in three aspects of components of family characters, mode of kin-novel\'s declination and nation-home integrated net narration.

作为相同题材选择的家族小说，无论古代还是现代，都会出现与家族题材相匹配的某些共同点，本文主要从家族人物的构成模式、家族小说的衰亡模式、家国一体的网状叙事等三个方面对此展开分析研究；古代家族小说从题材选择、聚焦对象、叙事策略、叙事结构、绾结方式、艺术神韵、悲剧精神等多个方面对现代作家的创作造成深刻的影响：而现代家族小说在继承传统的同时，还从人物构成的渐趋丰满、人物命运在新的时代背景下的延续发展、小说结局的改变、人物心理探索的深刻和自觉、意象的变幻多姿等方面对古代家族小说进行了现代意义上的发展和演进。

Based on the elastic theory of large deflection and by taking into account the variation of the axial force and its effects on bending deformation of the drillstring in vertical section,the vibration of the drillstring induced by fluctuating weight-on-bit is described by a parametrically excited system.A Mathieu equation describing the system is established by Galerkin Method.By extending the solution into a Fourier series,the curves of dynamic bifurcation values and the dynamically unstable regions surrounded by the curves are presented.

基于弹性大变形理论，考虑到轴力沿钻柱轴线的变化及其对钻柱弯曲变形的影响等因素，将受自重作用的铅垂井段钻柱在波动钻压激励下的振动转化为一个参数激励系统，用Galerkin方法首次得到了描述此系统的Mathieu方程，并通过将方程的解展成富里叶级数的方法，得到了该振动系统的动力分岔值曲线及其所包围的动力不稳定区。

In the chapter 3,we base on the existence of periodic solution ,using the method of linearization and applying the mean value theorem and the variation-of-constants formula, we get the sufficient condition of the exponential stability of periodic solution of a class of nonlinear functional differential system .

在第三章中，建立在系统周期解存在的基础上，利用线性化的方法，根据微分中值定理和常量变差公式，得到了一类非线性泛函微分系统周期解指数稳定的充分条件。

The accuracy and resolution of phase comparison method in length variation measurement are analyzed.

对长度变化测量的相位差方法的准确度及分辨力进行了探讨。

And the conservation laws of moment and momentum are obtained by the combining the tiny element analysis method in continua mechanics with variation principle in analytical mechanics.

论文摘要：本文在建立时变边界挠性体的动力学方程时，将并入的质量对挠性体的作用当作时变边界上的表面力，并将连续介质力学中的微元分析法和分析力学中的变分原理相结合，导出了时变边界的变质量刚体的动量和动量矩矩方程。

In an induction motor maximum efficiency control system based on vector control, variation of mutual inductance resulted from the magnetizing flux adjustment is a problem to be solved. This paper proposed, based on model reference adaptive system, a novel method for on-line identification of the induction motor mutual inductance.

针对矢量控制下感应电机最大效率控制系统中由于调整磁链而引起的励磁互感变化问题，基于模型参考自适应(model reference adaptive system，MRAS)提出一种励磁互感在线辨识新方法。

The way to use PMP to solve problem is a kind of sifting method:"If the control isreally an optimum one,then under the conditions stated beforehand,the needle variationmust not cause the index to have negative variation."

Pontryagin的最大值原理解决实际问题是筛选的方法："即如果是最优控制，那么其在满足约束条件的前提下，必须有进行针状变分不会造成指标泛函的变分为正。"

To develop the missile quasi-linear model, a state space model is established for missile dynamics, and function substitution method is used to describe the nonlinear dynamics of missile as linear combinations of functions of given time-varying parameters. With the minimizing variation range of model parameters over the whole design envelope as the optimum aim, linear programming optimum arithmetic is used to determine the model parameters at selected grid points.

为了建立导弹准线性化模型，将导弹动力学描述为状态空间形式；采用函数替换方法将导弹的非线性动力学描述为关于特定时变参数的函数的线性组合形式；以整个设计区间内模型参数变化范围最小为优化目标，采用线性规划优化算法确定了所选网格点上的模型参数。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。