脉冲

Consequently,the self-focusing properties of the pulse with large chirp in the nonlinear medium with normal dispersion were different from those of femtosecond pulse,but similar to those of nanosecond pulse.

因此，具有大啁啾的脉冲在非线性正色散介质中的自聚焦特性不同于飞秒脉冲，而与纳秒脉冲相似。

Firstly, we consider SIQR epidemical models with continuous and pulse vaccinations; the reproduction numbers have been obtained for those models; by using Dulac function, we prove the global stabilities of equilibrium of SIQR model with continuous vaccination. In the SIQR epidemical models with pulse vaccinations, we have also discussed the existence of the infection-free periodic solution, the global stabilities of the infection-free periodic solutions, and the effectiveness of pulse vaccination and continuous vaccination policies has been compared for the two models.

文中首先考虑具有连续免疫接种和脉冲免疫接种的SIQR传染病模型，分别获得了它们各自的基本再生数；利用Dulac函数方法证明了具有连续免疫接种的SIQR模型无病平衡点的全局渐近稳定性；在脉冲免疫接种下SIQR传染病模型里，讨论了无病周期解的存在性，证明了该周期解的全局渐近稳定性，并且对连续和脉冲接种下的SIQR传染病模型的接种效率进行了比较。

We had also performed numerical simulations to study energetic particle injection at L=3.5 to discuss the effect of different pulse parameters on particle injection.

我们也完成在 L=3.5 的电子流量模拟，讨论不同的脉冲参数对於粒子传输的影响和电磁脉冲传输粒子至该处的可能性，以了解是否此电磁脉冲模型可应用於了解磁暴时，在 L=3.5 处高能粒子流量增加的可能性。

It is found that due to the interference between the multi-reflected beams inside the etalon,the transmitting pulse is composed of a series of sub-pulses which are separated by the one-way traverse time of the light inside the etalon.

由于光在标准具内多次反射所引起的干涉效应，发现输出的光脉冲包含了一连串的次脉冲，这些次脉冲的时间间隔等于光单次通过标准具的时间。

From the ultrashort pulsed Gaussian beams, based on the properties of Laguerre polynomial, a family of solutions are found in theory, which represents a new family of ultrashort pulsed beams called ultrashort pulsed elegant Laguerre-Gaussian beams.

从超短高斯脉冲光束出发，根据拉盖尔多项式的性质，用理论解析推导的方法，给出了一组新的超短脉冲光束的解析解，称为超短复宗量拉盖尔高斯脉冲光束。

A new finger-print recognition method using pulse-coupled neural network s;2. Image segmentation based on pulse-coupled neural network ;3. The principle of pulse-coupled neural network used for determining the optimum route is analyzed.

分析了脉冲耦合神经网络的路径寻优原理，针对交通诱导系统的要求提出了脉冲耦合神经网络的简化方法和应用模型，给出了基于脉冲耦合神经网络简化模型的最短路径的算法。

The paper introduced a dispenser cathode (411 M) which was 55 mm in diameter. A 200 kV long pulsed power generator with 2 μs flattop based on Marx-PEN and system with heat and voltage insulation were built.

介绍一种直径为φ5mm的饿膜(411M)储备式热阴极，并以此为基础，建立了一套脉冲电压幅度为200 kV、脉冲平顶宽度大于等于2 μs的长脉冲功率源以及配套的加热系统与高压隔离网络电路。

Variations of attenuation coefficients with rain rate for MP and LP model are compared under Mie theory and Rayleigh approximation. The approach to the solution of the Fourier integral in closed form is adopted for pulse propagation through rain medium .

在此基础上应用傅立叶时域积分近似解的方法研究了毫米波段脉冲波通过雨介质时，脉冲畸变随频率、降雨率、传播距离及脉冲宽度变化的关系。

Trigger control circuit in accordance with pulse phase and input along the angle of the trigger value, the corresponding time delay after the rising edge of trigger pulse, open SCR, and in the corresponding half-cycle before the end of hair falling edge trigger pulse, turn-off thyristor, for the next half cycle of the trigger ready.

触发控制电路根据鉴相脉冲沿和输入的触发角数值，延迟相应时间后发出触发脉冲上升沿，打开可控硅，并在相应半个周期结束前发触发脉冲下降沿，关断可控硅，为下个半周期触发做好准备。

The relation between the center of time gravity of the ultrashort pulse and the carrier phase was studied by using three kinds of pulses,named Gauss,Hyperbolic Secant and Lorentz pulses.The analytical expressions of the relation between them was deduced.

以Gauss、Hyperbolic Secant、Lorentz三种脉冲为例，利用理论推导和数值模拟的方法研究了载波相位对超短脉冲时间重心的影响，并给出了三种脉冲的时间重心与载波相位的解析表达式和数值模拟的图形。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。