周期

In fish and amphibia, the transition from maternal gene transcription to zygotic transcription happens during the time of midblastula formation, this stage is named by midblastula transition, at this period, embryo cell cycle composition changes, it is the first time to G1 time appearance, the cell cycle timelimit lengthens and the cell division synchronism loses, the large quantities of zygotic gene transcription starts.

鱼类和两栖类由母型调控向合子型调控过渡发生在中囊胚形成阶段，称为中囊胚过渡(midblastula transition，MBT)，胚胎细胞周期时相的组成在此期间发生变化，首次出现G1期，周期时限延长，细胞分裂的同步性丧失，大批合子型基因活化转录也在此时开始。

When a pathway, such as the Embden-Meyerhof pathway or the TCA cycle are amphibolic pathway is referred to as an amphibolic pathway .Pathways of glycolysis and the TCA cycle are amphibolic pathways because they provide ATP and chemical intermediates to build new cell material .The main metabolic pathways ,and their relationship to biosynthesis of cell material ,are shown in figure 21 below.

当一种方式，譬如Embden-Meyerhof方式或三辛胺周期方式，指一条醣解作用为方式路径，并且三辛胺周期是一种方式，因为它们提供ATP 和化工中间体建立新细胞物质主要新陈代谢的方式，与它们的关系构成细胞材料生物合成，下面介绍表21 。

A new approach by use of an electro-optic aperiodically poled lithium niobate is proposed to realize Q-switch operation of the simultaneous dual-wavelength laser.

利用PPMgO：LN晶体，获得了1571~1679nm范围内的宽带输出。5、提出了一种利用倾斜周期极化晶体非共线光学参量振荡产生宽带光源的新方法。6、提出了一种利用非周期极化铌酸锂晶体电光效应实现双波长激光器调Q的新方案。

Sufficient conditions are derived for the permanence and for the existence, uniqueness and global attractivity of periodic solution.

给出了当系统为周期系统时，其周期解存在惟一和全局吸引的条件

By Independent-subsystem method, the results of existence and global attractivity of a positive periodic solution are obtained.

本文运用重合度理论中的Mawhin延拓定理或系统的持久性结果得到了几类种群生态学模型正周期解的存在性条件；并通过构造Lyapunov泛函(或Razumikhin函数)研究了某些模型正周期解的全局吸引性。

The sufficient conditions for persistence and global attractivity of peridic solutions are obtained by means of using differential inequality and constructing suitable Lyapunov function.

研究了一类扩散具有时滞的非自治捕食系统的持久生存与周期解问题，利用微分不等式和L iapunov泛函的方法得到了该系统持久生存与周期解全局吸引的充分条件。

In chapter 2, we introduce a generalized harvesting model, which is belong to piecewise continuous argument delay equations, we present sufficient condition to ensure the global attractivity of unique positive equilibrium and explore the possibility of emerging complex behavior-chaos.

研究了其正平衡解的全局吸引性，和可能出现的复杂动力学行为－－混沌；利用概周期序列的概念研究了分段连续时滞的微分方程的概周期解的存在性。

The existence of positive periodic solution is obtained by the help of Mawhin continuation coincidence degree theory and the global attractivity of positive periodic solution is presented by Lyapunove method.

推广和改进了已有的相应的非脉冲微分方程的结论；利用Lyapunov泛函，得到了该系统正周期解是全局渐近稳定的，从而得到了周期解的存在唯一性，通过数值模拟来验证了所得到的结果。

Firstly, sufficient conditions are given for permanence and global attractivity of the systems, and some results of Li Chuanrong and Lu Songjian on the periodic systems are generalized to general nonautonomous systems.

首先，我们给出了该系统持久和全局吸引的充分条件，把李传荣和卢松坚关于周期系统的有关工作推广到一般非自治系统；其次，改进了周期情形的有关结果。

The two mesoscale vortices for east-west distribution are similar to azimuthally wave number two and intensify TC more strong than other two vortices distributing and weaker than actual azimuthally wave number two waves disturbance.

台风内核区和眼壁附近扰动的减弱使台风最大切向风速的增幅减小，且强度增强，风速变化的震荡性加强，震荡的周期缩短；强度减弱，风速变化的震荡性减弱，震荡的周期加长。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。