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In this study, the CPE processes of four different kinds of polyaromatic hydrocarbons, acenaphthene, anthracene, phenanthrene a...

今利用两种聚醚型有机硅表面活性剂DC-193和DC-190，对蒽、菲、芘和苊四种多环芳烃进行浊点萃取研究，分别使用加热、加盐、离心和搅拌等辅助方法改变相分离过程的速度。

New bone formation was observed to be increasing significamly in both DCN bone cements and DC bone cements with the passage of time. By the end of 24 weeks, new bone had bridged the gap between the proximal and distal fragments in DCN bone cements and DC bone cements. By histomorphological detection in DCN bone cements, Abundant of chondral and new bone islands were seen at the site of defects 4 weeks after the operation and a number of new bones formed and enlarged by both enchondral ossification and appositional formation by the 8th weeks.

研究发现，DCN骨水泥植入4周大量间充质细胞分化，在材料与骨端之间出现一层软骨细胞，软骨细胞继续增生并向编织骨分化；8周材料降解的同时，小梁骨出现；12周新骨长入材料并已经基本替代完成，形成初步骨性连接；24周骨缺损完成骨性连接，新骨进行结构改建，材料内部形态结构明显变化。

By means of simulation, the authors research the over-voltage level at AC and DC sides of converter station as well as arrestor operation condition caused by last breaker trip occurred in inverter station of UHVDC power transmission project from Yunnan to Guangdong; analyze and reveal the interrelations among over-voltage level, various operation conditions and different action delay of DC protections and propose the requirement to the time of protection coordination to ensure secure and reliable operation of equipments for the project.

文章对云广特高压直流系统逆变站最后断路器跳闸引起的换流站交直流侧过电压水平以及避雷器工况进行仿真研究，分析揭示不同运行工况、不同直流保护动作延时与过电压水平的相互关系，提出对保护配合时间的要求，以确保系统设备能安全可靠运行。

Brought up as a Field Artilleryman,his duty positions include Commanding General of the US Army Combined Arms Command Fort Leavenworth/Deputy CG, US Army Training and Doctrine Command for Combined Arms, Fort Leavenworth, Kansas; CG, 3rd Infantry Division, US Army Europe and Seventh Army; Director of Force Development,Office of the Deputy Chief of Staff for Operations and Plans, US Army,Washington, DC; Director, Army Airland Battle Deep Attack Programs Office, and Deputy Chief of Staff for Operations and Plans, US Army, Washington, DC; and Director of Studies and Analysis, Office of the Deputy Chief of Staff for Combat Developments, TRADOC, Fort Monroe,Virginia.

他是一名与生俱来的野战炮兵，他曾经担任的职位包括：肯萨斯州莱文沃思堡美国陆军合成兵种司令部的将军级指挥官；肯萨斯州莱文沃思堡美国陆军训练与条令司令部负责合成兵种的副将军级指挥官；美国驻欧洲陆军和第七集团军第三机械化步兵师的将军级指挥官；华盛顿特区美国陆军副参谋长办公室负责作战与计划的部队发展主管；华盛顿特区美国陆军机降作战纵深攻击项目办公室主管，和负责作战与计划的副参谋长；弗吉尼亚州门罗堡训练与条令司令部负责作战开发的副参谋长办公室研究与分析主管。

The DC and AC attenuator circuits provide ranging for the AC and DC functions.

直流和交流衰减器电路提供直流和交流功能的量程切换。

According to capability of the circuit of DC motor, build the model of DC motor; designed the speed-current double closed loop system based on the model of DC motor; analyzed the method to solve the problem of discontinuousness of current.

二、根据直流电机回路，建立电动机的数学模型；针对该电动机模型，选用速度——电流双闭环控制系统，建立双闭环系统的控制方框图；分析晶闸管相控整流方式中出现电流断续现象的解决方法。

It has function of high performance DC pules TIG welding, DC TIG welding and DC manual welding, is a kind of applied machine.

具有高性能直流脉冲TIG焊、直流TIG焊功能，又可直流手弧焊是经济实用性机型

In order to study diesel locomotive AC-DC electric-drive system, this thesis makes a analysis of the primary capability parameters of AC-DC electric-drive system, under the train"s running state, such as traction dynamotor"s voltage/ current, pulling power and train velocity, then makes a research in the ideal running characteristic and the adjust characteristic of dynamotor and the speed adjust characteristic of electromotor with the theory of AC-DC electric-drive.

本文针对内燃机车交-直电力传动系统，对机车运行过程中，传动系统的主要性能指标参数(如牵引发电机电压/电流、牵引力、机车速度等)及其关系进行分析；并运用交-直电力传动原理，对机车电力传动过程中牵引发电机的理想外特性、调整特性及牵引电动机的速度调节特性进行研究；通过参考东风7型内燃机车的性能、结构参数，运用Visual Basic对内燃机车交-直电力传动系统进行数学建模。

Introduced the analysis and processing of a transformer with three-phase winding of DC resistance imbalanced defect,through further analysis of the after processed DC resistance,believed the transformer still existing the polarity selector"-" side contact deficiency,further on finding out the method of comparing corresponding DC resistance difference rate at each tap has the advantage to detect the polarity selector defect more accurately more sensitively and more directly.

对一台变压器出现三相绕组直流电阻不平衡缺陷的分析和处理情况做了介绍；通过对处理后直流电阻的进一步分析认为，该变压器还存在极性选择开关&－&向侧仍有接触不良方面的缺陷，遂进一步提出，如采用比较各对应分接位置下直流电阻差率的方法能够有更准确、灵敏、直接地发现极性选择器方面缺陷的优点；还提出了测试变压器绕组直流电阻时的几点注意事项。

This paper proposes a switched-mode boost DC-DC converter, which doesn't need not only a saw-tooth wave generator but also an error amplifier. By using a comparator and a fixed duty-cycle oscillator, the proposed controller will offer a high DC voltage of 15V to drive the LED backlight driver for Liquid Crystal Display.

中文摘要本论文提出ㄧ种不需锯齿波产生器和误差放大器的架构，其系利用比较器和输出固定责任比的振荡器来替代锯齿波讯号，藉此控制开关的动作，完成升压式直流电压控制晶片，以提供15伏特直流偏压给小尺寸液晶显示器(Liquid Crystal Display， LCD)。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。