直流的

Battery is a basic part of substation DC system, and it is the important device of energy storage and the core of uninterrupted power system.

蓄电池是变电站直流系统的基本组成部分，是重要的储能设备，也是不间断电源的核心。

The calculated results reveal that the turbulent mixing coefficient of particles increased by pulse corona discharge and 4 times that of D.

计算结果表明，脉冲放电加大了粒子的紊流掺混系数，是直流电晕的4倍左右，使粒子的静电收集效率降低。

Every summer, plenty of slender squash and tender cucumbers hung from the green vines; we never needed to go to the vegetable market. All you had to do was to pick a cucumber here, grab an eggplant there, chop them up, toss them on the fire, and an aromatic "DaRu Needle" would be ready in no time, sure to make your mouth water.

一到夏天，绿藤上便挂满了细长的丝瓜、鲜嫩的黄瓜……我们根本不需要到集市上去买菜，东家摘个黄瓜，西家摘个茄子，在炉火上一加工，香喷喷的打卤面便呈现在眼前，保证你馋得直流口水。

The deaerator tank is one of the main auxiliaries. The dynamic properties of the deaerator tank will directly affect the economy and safety of the operation in the once-through boiler units when it starts up.

研究除氧器水箱在直流锅炉启动时的动态特性对提高机组运行的可靠性和经济性具有重要的实际意义，因此成为上海市产学研难题攻关项目之一。

SB2015-3 Precision Decade DC Resistance Box adopts high voltage glass glaze resistors and special high voltage seal switch.Its electric performance is very stable and insulation intension is very high.The resistance value can be adjusted under the condition of ceaselessly opening voltage(Note:The using switch should not be at the point of 0.)It is easy to operate and suitable to be used to calibrate insulation resistance meter,and suitable to be used as high resistance standard.

SB2015-3型精密十进位直流电阻箱采用高压玻璃釉电阻器及独特的高压密封开关，电性能稳定可靠、绝缘强度高、可在不断开测试电压的条件下调节电阻值（正在使用的那只开关不处在"0"位置时）、操作方便，适用于检定/校准绝缘电阻表，也可作为高阻标准。

The core of this parallel algorithm is the models and algorithms of coarse-grain space parallel fast decoupled load flow and coarse-grain space parallel linearized load flow proposed in this dissertation based on the decomposition and coordination principle of large-scale networks.

该方法的核心是基于大规模电网分解协调计算原理，本文提出的粗粒度空间并行的快速解耦潮流模型及算法和直流潮流模型及算法。

The electrical propulsion system proposed in this article utilizes the advantages of PMSM such as small volume, light weight, small moment of inertia and high effectiveness of operation, high reliability, against the DC electric propulsion system"s defectiveness on structure and asynchronous electric propulsion system"s power defectiveness and inefficiency.

本文设计的PMSM电力推进系统利用了永磁同步电动机体积小、重量轻、转动惯量小、运行效率高、可靠性高等优点，弥补了直流电力推进系统在结构上的固有缺陷以及异步电力推进系统功率因素低和效率低的缺陷。

The relation between winding demagnetization and rotor position detection of sensorless BLDC motor control is discussed in this paper.

本文阐述了无位置传感器直流无刷电机控制中退磁与转子位置检测的关系，通过对退磁过程的分析，提出了通过PWM配置使断电绕组具有最大反向电压的加速退磁方法。

Experiments on purification technologies for the conversion of cornstalk biomass into the industrial product were made to produce cornstalk gas in the down-flow fixed by the gasifier. The experiment focused on the technical procedures for deoxygenation. catalytic cracking of tar, hydrogenation, etc. Quality straw syngas was produced for methanol synthesis. The catalysis of methanol synthesis for the production of cornstalk syngas was earned out in a tubular-flow integral and isothermal reactor under the pressure of 5MPa over Cu-based catalyst C301 (particle size: 0.833mm×0.351mm), a catalyst made in China. Thirty-three sets of test data were obtained.

为了实现秸秆类生物质合成燃料甲醇的工业转化，有效利用生物质能，对下吸式固定床气化炉产生的低热值玉米秸秆燃气进行除氧、分解焦油和配氢等纯化试验，制备出合成甲醇的优质秸秆合成气，在直流流动等温积分反应器中，使用国产C301铜基催化剂，催化剂粒度为20~40目(0.833mm×0.351mm)，在5MPa反应压力下，对玉米秸秆合成气进行催化合成甲醇试验研究，获得33套试验数据。

The error of dielectric loss angle calculated by this way is reduced more than 18% than the former one.

仿真结果表明，该方法计算介质损耗角时的误差，较单独使用相关系数法时减少18%以上，克服了谐波及直流分量的影响，提高了相关系数法测量介质损耗角的精度。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。