查询词典 necessary condition

Additivity of average mutual communication is proved, based on this, inequality for general correlation coefficients is derived, and the necessary and sufficient condition is obtained for equality.

证明了平均互信息的可加性，在此基础上得到了广义相关系数不等式，并给出了等式成立的充要条件。

In the second chapter, the problem of the optimal inputting rate control for a class of competitive population dynamics system with age-structure is discussed. By means of characteristic line, Gronwall Lemma, Bellman Lemma, adjoint system and so on, the Lipschitz continuity properties of the system in terms of the control variable is certificated, and the necessary condition of the optimal control is obtained.

第二章讨论了一类具有年龄结构的竞争种群系统最优输入率控制问题，综合应用特征线法，Gronwall引理，Bellman引理，共轭系统等知识，证明了系统解关于控制变量的Lipschitz连续性，给出了控制为最优的必要条件。

The formal solution of partial differential equations is given on characteristic line, the existence of the optimal control is proven by using Ekeland\'s variational principle, Gronwall Lemma and adjoint system, then the necessary condition of optimality is obtained by means of the conception of normal cone.

用特征线法表示出偏微分方程的形式解，利用Ekeland变分原理，Gronwall引理和共轭系统证明了最优控制的存在性，并借助于法锥概念得到了最优控制的必要性条件。

Based on these results,a sufficient and necessary condition for systems to be admissible was derived.

近年来，很多的研究者正试图将这种方法推广到广义系统中。

Based on which, a necessary and sufficient condition for the existence of controllers is derived and the analytic expression of expected controllers is proposed.

汽约束下具有鲁棒稳定性的充要条件，在此基础上，得到了Delta算子系统状态反馈控制器存在的充要条件和解析表达式。

The reason of anole boss capricing is that he is unwilling to respond.It's the representation of insufficient confidence.Therefore,as a worker,you should supervise and urge him to mend.You should remember clearly what he said and what he explain in any condition.If necessary,you can record that on the paper or computer to prepare the need.Actually,such habit is a good work attitude.

变色龙老板之所以善变，主要是因为他不愿意承担责任，是他信心不足的表现，所以，作为打工族，应"督促"他改正，他在任何情景下说过的话、交代过的事情，一定要记清楚，如有必要，你可以记载在纸上或电脑之中，以备及时之需，实际上，这种习惯也是一种良好的饿工作态度。

In the last section, we obtain a sufficient and necessary condition for an antichain to be the set of all circuits of a combinatorial scheme.

在最后一节，我们得到了组合概型的一个反链是其所有圈集的充分必要条件。

To actualize condition-based maintenance for Metal-Oxide Arrestor, which is a kind of important device used to restrain overvoltage in the electric power system, the research of on-line monitoring of MOA is important and necessary.

金属氧化锌避雷器MOA作为电力系统重要的过电压保护设备，对其开展在线监测是实现状态维修的必然要求。

In this paper,through construction of an asymptotic solution,We give a necessary condition of the micro local form to local solvability of boundary value problem of pseudo differential equation with two variables.

利用微局部分析的工具，讨论了含两个变量的拟微分方程边值问题的局部可解性；通过构造渐近解的方法，给出了上述问题局部可解的微局部形式的必要条

At the same time,the other necessary and sufficient condition is obtained for causality and asymptotic stability of the systems.

目前对于稳定性研究主要采用的是Lyapunov方法，Lyapunov方法在控制系统的研究中起着非常重要的作用，很多的研究学者已将这种方法推广到广义系统中。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。