脉冲

An image processing algorithm was developed to acquire topside and backside sizes of weld pool.

分析了一个脉冲周期内不同时刻的熔池正反面图象，获得了在脉冲周期内最佳的取象焊接电流和取象时刻。

The present invention discloses a silver iodide acetone solution above-ground combustion equipment, including liquid storage tank, air compressor, liquid-supplying and gas-supplying pipelines, filter, atomizer, pulse high-voltage igniter, combustion chamber and wind-proofing device, the above-mentioned components are placed on a base seat. The liquid storage tank is communicated with liquid inelt of atomizer by means of filter, the air outlet of air compressor is communicated with air inlet of the atomizer, the combustion chamber is a circular truncated cone shaped cylinder body whose upper portion is larger and lower portion is smaller, and is placed on a vertical rod.

本发明公开了一种碘化银丙酮溶液地面燃烧装置，包括储液罐、空气压缩机、供液供气管路、过滤器、雾化器、脉冲高压点火器、燃烧室和防风装置，上述装置均设置在一底座上；其中储液罐通过过滤器连通到雾化器进液口，空气压缩机出气口连通到雾化器进气口；燃烧室为一下大上小的圆台形筒体，设置在一竖杆上，雾化器的出口设置在燃烧室内；燃烧室上外围设置防风装置，该防风装置是一圆形防风圈；所述脉冲高压点火器的一电极设置在燃烧室壁面，另一电极设置在燃烧室内。

The locomotive adopts chopper main circuit of 4 uncombined phases and a control mode featuring accessory pulse generated firstly, main pulse secondly, and central phase shifting of the 4 phases.

该车采用了4相不重的斩波主电路和先发副脉冲、后发主脉冲及4相集中移相的控制方式，并特别试制了适用于斩波的滤波电容器及换相电容器。

If the impulse force does not work on the centroid of projectile, the correction effect under OIT can achieve that when force work on the centroid, the machining and assemble tolerances can be lower, and a better correction can be achieved.

如果脉冲推力冲量没有作用于弹丸质心，有利触发时机的修正效果可以达到脉冲推力冲量作用于质心时的结果，降低修正弹药的加工装配精度要求，获得较理想的修正预期。

The unoperated sides of the treated animals also served as controls. Six normal rats were treated as normal control group. Three different siRNA plasmid solution containing RC2-Ⅰ, MAFbx-Ⅱ, CON (50μl , 0.8μg/μl)was injected and transfected by electroporation as methods mentioned above, respectively. The changes of RC2 and MAFbx mRNA levels and RC2 protein levels after 3 days were determined by real-time quantitative PCR and Western blot, respectively. On postoperative 2, 3 and 4 weeks, the rate of wet muscle weight preservation, mean diameter of muscle fiber and mean cross-section area of muscle fiber and muscle protein content were checked and then compared between group CON and group RC2 or group MAFbx, respectively. The differences between groups were analyzed by one-way ANOVA. Ultrastructural changes of muscle fiber were observed at 2, 3, 4 weeks postoperation.Results GFP plasmid was efficiently deliverd into muscle by electroporation and robust GFP expression in muscle could be observed more than three weeks. Histology shows that injected plasmid DNA diffuses extensively in muscle tissue.

1、健康雌性SD大鼠18只，随机分为电穿孔组和非电穿孔组，每组9只，制作右下肢趾长伸肌失神经支配模型；EP组为将质粒pEGFP-N1溶液50μl(0.8μg／μl)注射入右趾长伸肌后，立即于两侧腱腹交接处给予电穿孔，电穿孔参数为：电场强度为200V／Cm，脉冲100μs，频率1Hz，施加10次脉冲；NEP组仅质粒pEGFP-N1溶液注射；转染后1、2、3周，荧光显微镜下观察趾长伸肌中GFP的表达情况，转染后1周行Western印迹检测趾长伸肌中GFP蛋白的表达情况，检测和优化体内转染效率。2、健康雌性SD大鼠78只，随机分为失神经对照组、RC2基因治疗组(RC2组)，MAFbx基因治疗组，每组24只，制作右下肢趾长伸肌失神经支配模型，余6只为正常组；分别将含CON、RC2、MAFbx基因的siRNA重组质粒注射入趾长伸肌，之后给予电穿孔，方法同上；治疗后3天实时定量PCR和Western印迹检测各组中RC2或MAFbx基因的mRNA和蛋白的表达变化，治疗后2、3、4周检测各组肌湿重维持率、肌细胞直径和肌细胞截面积，肌细胞超微结构变化以及肌纤维中蛋白含量变化。

In Chapter 3, we consider the stability and unstability with respect to part of the variables in equation.

第三章，我们讨论了具有固定脉冲时刻的脉冲微分方程的稳定性和不稳定性。

First of all, we review the development of ultrashort pulse-laser technique ,and key techniques to upbuild high-energy ultrashort pulse-laser system and estimate of the techniques are introdused.

本文首先回顾了超短脉冲激光技术发展的历史，分析了目前飞秒激光的现状，并且讨论了建立高功率短脉冲激光装置的关键技术。

It was found that the selective photoreductionreaction of this uranyl compound could take place under pulsed IR laser irradiation and the rate ofphotoreduction depended on the frequency, energy fluence and numbers of pulses of laser.

用TEA-CO_2激光研究了室温下固体的甲酸铀酰钠的红外光化学反应，发现该化合物在脉冲红外激光照射下可产生选择性的光化还原反应，其光化还原率与激光频率、能量密度和脉冲数有关。

A design of capacitive resistor voltage divider is provided for the experimental research of pulse capacitor discharge characteristics.

该文设计了一种包括脉冲电阻分压器和高压云母电容器的阻容型分压器，用于脉冲电容器放电特性的实验研究。

The voltage ratio of the capacitive voltage divider was determined to be 418.5 with an accuracy of 4.6% and the resistance of the stainless steel film 1.43 mΩ with an accuracy of 5.1%.

1引言在脉冲功率技术中，脉冲高电压和大电流是十分重要的电气参数，要求测量得到的电压和电流波形真实准确。

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。