查询词典 characteristic differential equation

The crystal structure, phase transition, cross-section morphology and thermal expansion coefficient of the samples were investigated by X-ray diffraction, thermogravimetric and differential scanning calorimetry, scanning electron microscope and dilatometry respectively.

通过X射线衍射仪、热重-差示扫描量热、扫描电子显微镜、热膨胀仪等分析手段对样品的晶体结构、物相转变、断面微观形貌和热膨胀性能进行表征。

In this article, we have been investigated that synthesizing and properties of shape memory polyurethane. The shape memory polyurethane was synthesized from PCL diol, MDI(4, 4'-diphenylmethane diisocyanate) and BDO (1,4-butanediol) in this experiment. We analyzed that the effect of differential mole ratio of monomers to synthesized SMPU. Besides, the various concentrations of Nano-silver were mixed with SMPU. Mechanical properties and shape memory behavior of SMPU nanocomposite films were investigated.

本研究目的为藉由改变4，4'-二苯甲基二异氰酸盐(4，4'-diphenylmethane diisocyanate， MDI)/聚己内酯二元醇(polycaprolactone diol， PCL diol)/1，4-丁二醇(1，4-butanediol， BDO)等不同莫耳比制备形状记忆型聚氨基甲酸酯(Shape Memory Polyurethane， SMPU)；并探讨改变不同单体莫耳比及添加不同浓度奈米银溶液对其物性及形状记忆性的影响。

This paper is discussed with kitchen balance as an example, through the method of theoretical research and investigation analysis is designed at early stage, with Semantic differential method, the market analysis and location that carries out product are evaluated with semantic discrepancy analysis law for product form, the investigation customer's good important lead role for entire design process makes design go forward along correct direction, to reduce the risk of design development, pass offset cost the research of psychology, may know the needs of customer fairly objectively, reach the conclusion of more near market demand, so play the part of the role of a kind of directiveness.

本论文以厨房秤为例，通过理论研究和调查分析的方法，探讨在设计前期运用消费问卷法进行产品的市场分析与定位，运用语义差异分析法对产品形态进行评估，考察消费者偏好对整个设计流程的重要导向作用，使设计能沿着正确的方向前进，降低设计开发的风险。通过对消费者心理的研究，可以比较客观地了解消费者的需要，得出比较接近市场需求的结论，从而起到一种指导性的作用。

From an in-depth introduction to the different types of dissipativity and attraction, the book freeduan.com takes a comprehensive look at the connections between them, and critically discusses applications of general results to different classes of differential equations.

从详细的dissipativity和吸引力的不同的类型的介绍，书freeduan.com 综合地看一下在他们之间的连接，并且严重地对微分方程的不同的种类讨论一般的结果的应用。

In Chapter 3, by establishing a L-operator inequality and using the properties of M-matrix and stochastic analysis techniques, some sufficient conditions ensuring the exponential dissipativity in mean square of impulsive stochastic functional differential equations of Ito-type are obtained.

第三章，通过建立L-算子不等式，运用M-矩阵的理论和随机分析技巧，获得了一类脉冲随机泛函微分方程均方指数耗散的充分条件。

Some new conceptions are presented about the dissipativity theory of Ito stochastic differential systems as follows:dissipativity in module,equi-dissipativity in module and uniform dissipativity in module.

提出了有关Ito型随机微分系统耗散性理论的新概念：按模耗散、按模等度耗散和按模一致耗散，并利用Lyapunov方法，借助于Ito微分公式沿着Ito型随机微分系统的解对所构造的Lyapunov函数求导数，给出了Ito型随机微分系统有关按模耗散理论的一些代数判据，获得了与确定性常微分系统耗散性理论相对应的结论，最后的算例证明了该方法的有效性和可行性。

It is also found that trade openness and FDI have differential distributional effects.

我们还发现对外贸易和 FDI 对收入分配的影响不同。

Methods:Choosing 51 cases that was the the stage of acute attack of chronic bronchus to partitionsyn drome by differential diagnosis.

人体上呼吸道菌群和免疫功能指标，可作为研究慢性肺心病急发期发病机理及中医辨证分型的依据之一。

Interface: double layer, electrocapillary phenomena, differential capacitance, and zero charge potential and adsorption phenomena.

课程目标：通过本课程的学习，使学生能够熟悉和掌握电化学的基本概念、基本规律、基本理论，为将来学习电化学专业课程以及从事电化学的研究和应用打下基础。

Electrocatalysis of carbon atom wire modified electrode to the electrochemical reaction of uric acid was investigated by using cyclic voltammetry and differential pulse voltammetry.

通过循环伏安法和差分脉冲伏安法研究了碳原子线修饰电极对尿酸电化学反应的催化作用。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。