脉冲

By using the theories and methods of impulsive,discrete and continuous dynamical system,arithmetic operators,optimiza-tion and numerical simulation,we study locally and globally asymptotieal stability of the boundary periodic solutions,and the permanence of the these systems.

以脉冲动力系统理论为基础，同时结合离散动力系统、连续动力系统、算子理论、优化理论等相关的理论和方法，在已有的研究成果的基础上，研究这些模型的边界周期解的局部和全局渐进稳定性、系统的持续生存、周期解的存在性与唯一性以及周期解的轨道稳定性等等。

In this paper,the method of feedback pulse of system variable was applied to control the discrete map and continuous nonlinear system for transforming a stable periodic motion into an unstable chaotic motion.

用系统变量的脉冲反馈法控制离散和连续非线性系统，使系统由稳定的周期运动转变为不稳定的混沌运动。

In chapter one, by using a competely continuous operator on cone and the Krasnoselskii fixed point theorem, we study the existence of positive periodic solutions of differential equations with impulses and delays, and some sufficient conditions will be given.

第一章讨论了一类具脉冲时滞微分方程周期正解的存在性，通过建立锥上的全连续算子，利用Krasnoselskii不动点定理，得到了存在周期正解的若干充分条件。

The relay is driven by a pulsed signal instead of a continuous signal.

这种继电器驱动而不是一个连续信号脉冲信号。

Laser light is, of course, available as a continuous wave or in the form of pulses.

当然，激光既可以是连续波，也可以是脉冲的形式。

In the 20th century, 70 years ago, due to the high-power continuous wave laser has not yet developed, the study focused on pulsed laser pick on.

在20世纪70年代以前，由于高功率连续波形激光器尚未开发出来，所以研究重点集中在脉冲激光接上。

With digital communication, there is no continuous carrier wave. Instead, bits are transmitted as brief, discrete pulses.

事实上，大量的新的通信设备是数字式的，用数字通信不存在连续的载波，而是把数位作为简单的离散脉冲传输。

The present paper proposed one kind of numerical control single-phase inversion structure, in detail elaborated the system parameter design, the rectification work basic principle of work, the contravariant basic principle and the SPWM sine pulse width modulation.

本论文提出了一种数字控制的单相逆变器结构，详细论述了系统的参数设计，整流工作的基本工作原理，逆变的基本原理及SPWM正弦脉冲宽度调制。

The presentpaper proposed one kind of numerical control single-phase inversionstructure, in detail elaborated the system parameter design, therectification work basic principle of work, the contravariant basicprinciple and the SPWM sine pulse width modulation.

本论文提出了一种数字控制的单相逆变器结构，详细论述了系统的参数设计，整流工作的基本工作原理，逆变的基本原理及SPWM正弦脉冲宽度调制。

Generalized Pulse-Spectrum Technique is a kind of widely applied and effective methods for solving inverse problems of geophysical prospecting. But it is still imperfect in the aspects of convergence domain, ability of anti-noise, computaional cost, choice of regularized parameter, and so on.

广义脉冲谱方法是求解地球物理反问题的应用广泛而有效的一类方法，但在收敛范围、抗噪能力、计算量、以及正则参数选取等方面仍存在较大不足。

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。