脉冲

Short TR, short TE spin echo or short TI, short TE composite inversion recovery (IR spin echo images are used to demonstrate the high signal that develops at some time after the ictus, as early as 10 hours but typically 2-3 days, and persists for a variable length of time, from a few weeks to a few months.

短TR，短TE回波脉冲(或短TI，短TE 整合反转恢复回波脉冲)影像主要用于显示高信号，这种信号常是病变爆发后产生，最早10小时，但典型是2-3天。并且高信号可持续几周甚至几个月。

The implanter equipped with intense current, pulsed cathodic arc metal plasma sources which have both strong coating function and gas and metal ion implantation function. Its pulse high voltage power supply can provide big output current. It can acquire very good implantation dose uniformity.

第三代多功能等离子体浸没离子注入装置的强流脉冲阴极弧金属等离子体源既具有强的镀膜功能，同时也具有强的金属离子注入功能；它的脉冲高压电源能输出大的电流；并可获得高的注入剂量均匀性。

A new-type composite gaseous-metallic ion implanter was developed for fully pulsate circuit by introducing the gaseous plasma induced by the pulse which is restrained by megnetic field so as to realize the gaseous and metallic arc discharge.

本文报道了新型全脉冲电路气体－金属复合离子注入源的结构和特性，采用在磁场约束条件下的脉冲引发的气体等离子体，分别引发气体放电和金属弧放电。

The basic principle of impulse response method and its progress in bone biomechanics research are briefly summarized in this paper.

文章介绍了脉冲响应法的基本原理以及在骨生物力学中的研究进展，并探讨了脉冲响应法的研究方向。

In chapter 4, we first discussed the existence of multiple positive solutions of the second order nonsingular Dirichlet boundary value problem for impulsive differential equations by using the fixed point index theorem in cones . Next, we presented some new existence results for singular boundary value problems for second order impulsive differential equations by using fixed point theorem in cones and Leray-Schauder nonlinear alternative theorem.

第四章我们首先利用锥不动点定理讨论了非奇异二阶脉冲微分方程狄利克莱边值问题多个正解的存在性；其次我们用锥不动点定理和Leray-Schauder型非线性抉择定理，讨论了奇异二阶脉冲微分方程狄利克莱边值问题一个及多个正解的存在性。

It is shown that what affect the amplitude of pre-pulse voltage are the grounding inductance and the frequency of the charging loop circuit, which is determined by the secondary coil inductance of transformer and the capacitance of PFL.

研究表明由变压器副边电感和脉冲形成线电容构成的回路充电频率和接地电感的大小是影响预脉冲电压幅值的主要因素。

The model is then used in an inductive storage circuit. Parameter analysis was applied in the simulation to obtain the performances of explosive wires.

然后将这个模型应用于一个含电爆炸丝断路开关的电感储能脉冲功率电路，以探讨电爆炸丝的参数选择对脉冲功率调制系统的影响。

The influences of reservoir pressure and pulse duration on instantaneous velocity are investigated.

在由 3根陶瓷滤管组成的实验装置上，利用热线风速仪对脉冲反吹时滤管外瞬态流场进行了测定，分析了喷吹压力和脉冲宽度对滤管外流场的影响。

The time domain electric field integral equation in conjunction with the reciprocity principle is applied to synthesize the transmitting impulse signals on condition that the receiving signals have already been known.

采用时域电场积分方程和互易原理相结合的方法，探讨了已知接收信号的情况下，脉冲发送信号的波形，并研究了视距和非视距两种传播路径对脉冲收发信号的影响。

Based on the Rayleigh-Sommerfeld diffraction integral and complex analytical signal representation,the free-space propagation equation and its Fourier spectrum for ultrashort chirped pulsed Gaussian beams are derived,and the far-field analytical electric field and spatial intensity are presented.

基于瑞利-索末菲衍射积分，使用复解析信号法推导出了啁啾脉冲高斯光束在自由空间中的传输方程及其傅里叶谱，给出了远场的光场和空间光强的解析式，研究了啁啾参数C对脉冲光束传输的影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。