必要条件

These algorithms contain rich information of system structure, especially, the information of coupling and structure at infinity.

给出非正则反馈线性化问题有解的一系列构造性的充分条件以及必要条件，以及求解线性化反馈变换的递推算法。

These factors are the essential conditions in which Athenian navy quickly rises.

这些因素是雅典海军迅速崛起的必要条件。

Moreover, by augmenting state vectors, the sufficient and necessary condition of mean square stability is obtained.

此外，通过增广状态向量利用系统的Markov切换特性得到了系统均方稳定的充分必要条件。

The comparison of resource gift the industrial competition ability that the advantage is not one country and enterprise are autogenous the requirement of ability.

资源禀赋的比较优势并不是一国的产业竞争力和企业自生能力的必要条件。

Automorphism group of a linear code is obtained with the help of the general linear group constructed by all invertible matrices,and it is illustrated by matrices generalized inverses.

文 [1 ]给出了判断一个置换矩阵是否属于自同构群的充分必要条件，文 [4]在此基础上利用矩阵广义逆理论对自同构群进行研究得出了一些有用的结论。

Stem cells in bone marrow are considered as an ideal sources of seed cells with the advantage of being isolation and easy proliferated in vitro, which is a prerequisite for the autotransplantation.

存在于骨髓内的干细胞来源丰富，采集方法简单，体外扩增容易，具有自体移植的必要条件，是一种理想的种子细胞。

Here conditions (1) and (2) are each on their own necessary conditions for bachelorhood and together they are jointly sufficient for bachelorhood.

在这里，条件（1）和（2）各自是单身汉身份的必要条件，合起来构成单身汉身份的充分条件。

Unmarriedness and maleness are each individually necessary conditions for bachelorhood; together, these criteria represent a sufficient condition for bachelorhood.

未婚状态和男人身份，各自是单身汉身份的必要条件；放在一起，这两个条件就是单身汉身份的充分条件。

Huang and Lin proposed the weak solution concept for Backward Stochastic Differential Equation This paper based on the predecessor's work , gives the weak solution concept for Backward Stochastic Differential Equation with continuous martingale,uses the Girsanov transformation, obtains its weak solution of the existence of a necessary and sufficient conditions, and on this basis obtains its weak solution of the existence of sufficient conditions,these sufficient conditions weakened the drifting coefficient which requested in the existence uniqueness of strong solution to satisfy the Lipschitz condition the request.

本文在前人研究的基础上，给出由连续鞅驱动的倒向随机微分方程弱解的概念，利用Girsanov变换，得到其弱解存在的存在的一个充分必要条件，并在此基础上得到了其弱解存在的一些充分条件，这些充分条件减弱了在强解的存在唯一性中要求的漂移系数满足Lipschitz条件的要求。

The paper addresses the existence problem of generalized inverses for elements of a Banach algebra under perturbations and derives a sufficient and necessary condition for the existence of generalized inverse.

文中讨论了Banach代数元扰动后广义逆的存在性问题。用线性算子广义逆的稳定性问题的方法，得到Banach代数元扰动后广义逆存在的充分必要条件以及稳定的一个充分条件

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。