流电的

This paper described the design of constant current discharging device based on thermal sensitive element of PTC,including discharging battery at constant current and limiting current simulation load of charging sets.

文章介绍了一种采用PTC热敏元件设计的恒流放电装置，着重介绍了对蓄电池组的恒流放电和作为充电机的限流模拟负载的工作原理，实现对蓄电池恒流放电。

Monoid algebra system is selected as the mathematical model of PORDBMS, and BSP as the parallel model. Monoid algebra system is powerful in expanding data types, offers a uniform notation for queries involving collection data types and methods, and provides a rigorous theoretical foundation.

在电网络有功分配与计算方面，本文较系统地分析了一般电网络模型与网络流规划算法模型的关系，从非线性无损失网络和有损失网络的角度研究了非线性网络流规划法求解电力系统网络问题的方法。

Since the ion radial distributions in liquid directly affect the electroosmotic flow, this study is useful for electroosmotic flow research and the design of nanofluidic devices for species separation by applied potential gradient.

由于离子的径向分布对电渗流有直接影响，因此这一仿真对电渗流的理论研究和利用外电场实现离子分离的纳流体器件的设计具有重要的参考价值。

In the downstream, a sudden expansion microchannel with asymmetric pairs of microelectrodes is designed. The multi-electrodes are formed beside the expansion microchannel and result in the trap of micro-particles. AC electric potentials are applied to each pair of asymmetric electrodes creating a non-uniform electric field. The tangential component of the field produces a force on the induced charges in the diffused double layer.

此外在扩张管道上采用一种可调控式的微粒子撷取装置，主要是在扩张管道的侧边镀上多对的电极，利用电极间电场所引起的局部的电渗流(Electro-Osmotic Flow， EOF)和轴向压力驱动流彼此间相反的运动方向，进而在管道壁面电极区间产生回流区。

The addition of 0.2 mmol/L of cetyltrimethylammonium bromide could change the direction of electroosmotic flow.

由于在背景电解质中加入了0.2 mmol／L十六烷基三甲基溴化铵，因而电渗流的方向与传统的毛细管区带电泳中电渗流的方向相反。

In order to improve the hydrophobicility of surface and control the magnitude of the electroosmotic flow, we modified the wall by dynamic coating and treated with oxygen plasma.

其中，为了改善高分子流道表面的疏水性质及调控适当的电渗流，以动态涂布及电浆处理对管壁进行修饰。

To determine whether α1 and α2-adrenoceptors are located postsynaptically on renal vascular smooth muscle, a new method was developed as the following: the right renal vascular beds in the pithed rats were perfused with blood drawn from carotid artery at constant rate by a pump.

本实验用颈动脉血恒速满流毁脑脊髓大鼠单侧肾脏的方法，观察了高度选择性α_1受体阻断剂哌唑嗪和α_2受体阻断剂育亨宾与去甲肾上腺素、肾上腺素及电刺激肾交感神经对肾血管平滑肌的相互作用。哌唑嗪明显抑制电刺激引起肾灌流压升高，但尚存留一小部分既不能被增加哌唑嗪的剂量所阻断也不能被育亨宾所阻断。

Electro-hydraulic valve and electromagnetic relief valve is not energized, the electro-hydraulic valve leakage in the medium load, electromagnetic relief valve is also in charge state of discharge, the main oil pump output back through the radiator tank.

电液换向阀和电磁溢流阀不通电时，电液换向阀处于中位泄荷，电磁溢流阀也处于泄荷状态，主油泵输出的油经散热器的回油箱。

In succession, by using of the simulative program under various running conditions, we studies the different effects that various parameters on the dynamic current-collecting such as running speed, span length, ocs tension force, masses of pantograph head and framework, damping capacity and stiffness etc. Moreover, measures are suggested to improve the quality of current-collecting, especially the idea of active control scheme, which restains the fluctuation of contact force by modulating the air pressure of pantographs airbag.

利用弓网仿真程序对各种工况的弓网受流进行模拟仿真，分别研究了列车运行速度、接触网跨距、接触线张力以及受电弓弓头和框架质量、阻尼、刚度等对弓网系统受流的影响，提出通过主动控制技术对弓网系统的振动进行抑制的气囊调节方法，将受电弓气囊的气压值作为控制对象，通过对气囊气压的调节来抑制弓网接触压力的波动。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

论文的主要研究工作为：运用化学反应工程理论，结合硝基苯的电还原机理，设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽，并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据，研究了流型随流量变化的规律；通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性，初步评选出了用于硝基苯电还原的电极材料；结合循环伏安的测定结果，在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线，得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值；在基础研究结论指导下，采用板框式电解槽，在高温、强酸、贫氧系统中，进行了一系列的电解实验，分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响，最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜，得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件：反应温度85℃，电流密度500A·m~(-2)，硫酸浓度20％wt。

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。