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The pulse overflow DDS, in which the overflow signal of the phase accumulator is used for the pulse output, can be easily implemented by using FPGA. But its pulse output has the drawback of the phase jitter.

脉冲溢出型DDS利用相位累加器的溢出信号作为输出信号，很容易用FPGA器件实现，但它输出的脉冲信号存在相位抖动的缺点。

In order to provide increased pulse width without compromising range resolution, a technique is used that provides for the transmission of a long pulse that can be compressed into a short pulse length in the receiver.

为了提供更多的脉冲宽度不损害分辨能力范围，使用提供长脉冲传输的技术，它可以在接收器中被压缩成短脉冲长度。

Resonant laser ablation is a two-step process, occurring within a pulse of a tunable laser, in which the leading edge of the laser pulse ablates the surface of the solid sample to produce neutral atoms or molecules that are then resonantly ionized by the trailing edge of the same pulse.

共振激光烧蚀技术是指发生在同一激光脉冲时间内的两步过程，它是指用波长可调谐的染料激光取代固定波长输出的激光，并调谐激光输出波长实现所研究原子或分子电子态之间的共振跃迁，激光单次脉冲的前沿对样品进行烧蚀，烧蚀的物质在激光光束内形成粒子气团，同一次激光脉冲的后沿实现对气相原子或分子的共振电离。

Result］ The syndrome of phlegm heat blocking lung is featured with fever,heavy cough,much sputum,red tongue,yellow greasy moss,slippery and quick pulse/purple and stagnant finger mark;the syndrome of wind heat with fever,heavy cough,snuffle and runny nose,red tongue,thin and yellow moss,shallow and quick pulse/ purple and shallow finger mark;qi deficiency of lung and spleen with impotent cough,much sputum,pale face,light tongue,white and greasy moss,thin pulse/light red or stagnant finger mark.

结果］痰热闭肺证以发热，咳声重浊，痰多，舌红，苔黄腻、厚，脉滑数、指纹紫滞为特点；风热证以发热，咳声重浊，鼻塞流涕，舌红，苔薄黄，脉浮数/指纹浮紫为特点；肺脾气虚证以咳声无力，痰多，面白无华，舌淡，苔白腻，脉细、指纹淡红或淡滞为特点。

The L band 500W SSPA module which has reached national level is the first sample of the Southwest China Research Institute of Electronic Equipment in this aspect;2. The method which to obtain fast rising time for narrow pulse width is got;3. The method of eliminating autoecious surge with pulse power amplifier is presented;The cause of pulse shape aberration is analysed.

二、工作的创新之处(1)L波段500W固态功放组件达到国内先进水平，是29所研制的第一台固态雷达功放组件；(2)得到了如何在窄脉宽情况下获得快速上升沿的方法；(3)提出了针对脉冲功率放大器的消除寄生振荡的方法；(4)对脉冲波形变差进行了分析。

The author mainly introduces the test devices for high-voltage pulse of ignitor, testing devices for pulse of ballests for lamps with overall activating devices and testing devices for the partial rectification of pulse of electronic ballast for fluorescent lamps, for reference.

由于一些照明电器检测装置使用上的不广泛性和功能上的特殊性，所以往往没有现成的装置可买，并且有些看似简单的东西确隐含着较高的技术难点。下面介绍几种已试制成功并能可靠使用的且能满足 IEC 标准和国标的检测装置，供业内同行们共享。

The author mainly introduces the test devices for high-voltage pulse of ignitor, testing devices for pulse of ballests for lamps with overall activating devices and testing devices for the partial rectification of pulse of electronic ballast for fluorescent lamps, for reference.

作者重点介绍了触发器高压脉冲检测装置、带整体式启动装置的灯用的镇流器脉冲试验装置及荧光灯电子镇流器局部整流效应检测装置，供业内人士参考。

The multicycle laser pulse is synthesized by a 10 fs/800 nm fundamental pulse and a 15 fs/1200 nm control pulse.

利用波长为800 nm，脉宽为10 fs的基频场和波长为1200 nm的控制场组成的双色场作用于不对称分子，发现不对称分子的高次谐波在平台区的末端呈现出光滑的超连续结构。

The numerical simulation shows that the harmonics at the end of the plateau become continuous and form a supercontinuum with a bandwidth of about 80 eV, from which a 50 as isolated pulse in the transform limited case can be generated, when asymmetric molecules are exposed to a multicycle two-color field, which is synthesized by a 10 fs/800 nm fundamental pulse and a 15 fs/1200 nm control pulse.

通过计算机数值模拟，发现当波长为800 nm，脉宽为10 fs的基频场和波长为1200 nm的控制场组成的多光周期双色场作用于不对称分子时，不对称分子的高次谐波在平台区的末端呈现出光滑的超连续结构。超连续谱谱宽达80 eV，可以支持傅里叶极限脉宽为50 as的单个脉冲输出。

The conventional SHPB technique is improved by using a pulse shaper. Pulse shapers technique is used to modify the incident wave and decrease the effect of wave dispersion to ensure stress equilibrium and homogeneous deformation in specimen, and furthermore a constant strain rate is attained during the loading history. The lasting time of acceleration pulse is enhanced to numerable MSEL, which is more close to actual loading.

本文改进了传统的霍普金森压杆技术，采用波形整形技术，改变加载波形，获得了比较光滑的入射波，降低了波的弥散效应，保证实验时火工品试样中的应力平衡和均匀变形，得到了更接近常应变率的动态加载条件，使加速度脉冲持续时间t提高数倍，更加真实的反映了火工品实际加载环境。

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。