流电的

METHODS: On the basis of PMT passive voltage biasing circuit, Bipolar Transistor or Field Effect Transistor were used. Additionally,"adjustable constant current technology" was adopted to avoid the effect of temperature on circuit.

在电阻型光电路倍增管偏置电的基础上，增加双极型晶体管或场效应晶体管构成有源光电倍增管偏置电路；并采用可调恒流技术，以解决温度对电路的影响。

This paper lists some important factors of influencing safe operation of bow net system,introduces pantograph and anti-scrape bow protection device which is installed on service locomotive,and discusses a new technology of improving pantagraph current quality——self-adaptive bow head system.

列举了影响弓网系统安全运行的几项重要因素；介绍在运营机车上试验安装的受电弓防刮弓保护装置，以及因该装置所产生的提高受流质量的新技术——自适应弓头系统；提出了两个系统整合的创新点。

FASS(field amplified sample stacking) is a technique for oncolumn enrichment in capillary zone electrophoresis. The distribution of solute in column during injection can be divided into two parts: the stack zone in running buffer and the sample solution zone imported by electroosmosis.

直接柱头场效应进样是一种毛细管区带电泳柱内富集，其进样过程中样品在柱内的分布可分为两部分，即在运行缓冲溶液中的堆积区段和由电渗流引入的样品溶液区段。

Because of the complexity of electric precipitator interior flow field, the problem can not be solved in theory. The precision and the range of use of kinds of equation are not satisfactory, the computational fluid dynamic can not easily attain better solution while the flow boundary condition is complicated.

由于电除尘器内部流场的复杂性，这一问题还无法从理论上来求解，而各种公式其精度和使用范围都不令人满意，计算流体力学在流动条件复杂的情况下不易取得较好的解。

The discharge scheme widely employed currently is the high voltage DC power which uses ballast resistor to restrict current and the typical electrical parameter scales are several kilovolt and hundred milliampere.

目前流行采用的是高压直流电源加镇流电阻的放电模式，典型电参数为接近10 kV 高电压、百毫安量级的低电流。

The precursive Fe3O4 films were sulfurized using constant current electrodepositing and oxidation treating, and Fe3O4 films was transformed into FeS2 thin films after heat sulfur annealing of 400℃ at different sulfurizing pressures.

采用恒流电沉积及氧化处理制备Fe3O4先驱体薄膜，再通过400℃下的热硫化退火，使Fe3O4先驱体薄膜在不同硫压下转变成为多晶FeS2薄膜。

It is revealed that the shearing Reynolds' stress in the fluid is the driving force of the fluid flow.

揭示了液体媒质中的雷诺切应力是电机声流场的驱动力。

As microfluidic technologies mature, accurate methods for the measurement of electroosmotic flow velocity on microfluidic chips are becoming increasingly important.

随着微芯片技术的成熟，越来越迫切地需要有一个准确而简洁的电渗流速度的检测方法。

Capillary phenomena was studied and discussed by the scholars about 200 years ago, but the progress was slow due to the limited equipments and manufacture precision of the microchannel.In recent years, because of the rapid development of MEMS and micromachining, many applications of the capillary flow is widely developing in some modern processes, such as underfilling of flip chip, flow in microfluidic chip or biochip, and a variety of other fields.

摘要 毛细现象大约在200年前便断断续续被欧美学者所研究讨论，但由於当时微细加工受到仪器设备和制造精度的限制，因此发展极为缓慢；近年来由於微机电系统与微细加工之精进，许多具有微流道的应用设备，陆续被制作问世，加上光学显微镜与影像撷取设备的普遍，对於研究此课题的推展极有助益；且随著微生医、覆晶底胶充填与微流体系统等领域之受到重视，毛细现象导致的充填问题、驱动原理及液体流动的控制，都变得相当的重要；本研究基於如此的动机与目的，进行微流道内液体之毛细流动现象及时间的探讨。

The performance of high speed electrohydraulic actuator applied to piston variable displacement compressor was analyzed.

针对高速开关阀流量限制导致的单高速开关阀驱动的电液执行器响应速度慢的问题，在对应用于活塞式变排量压缩机上的高速电液执行器进行性能分析的基础之上，提出了高速开关阀作为先导阀、二级机械阀作为配流阀的方案，建立了数学模型，并进行了仿真。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。