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In analyzing the symmetrical element features of power system, the definition of circulator element and circulator node is developed.

通过对相分量法短路故障处理的分析,以定长度向量方程的多态相分量法为基础,提出了用于处理电力系统短路故障的残量变换法和残压变换法。

Since continuum hypothesis is still valid for liquid flow in microchannels with hydraulic diameter at about 100 micro-meters, a turbulence convection heat transfer model for single-phase liquid flow in microchannels is established, in which wall surface roughness viscosity is introduced.

分析表明水力直径为100μm左右的微管道内单相液体流动仍满足连续介质假设,引入粗糙度粘性系数,建立了微管道内单相液体湍流对流换热模型,并采用3维有限容积法进行了数值计算,将计算结果与实验结果进行了对比。

Thus, the output will always be driven by a single transistor, either P- channel or N-channel. Since they are as closely matched as possible, the output resistance of the gate will always be the same, and signal behavior is therefore more predictable. Fig. 3.4 CMOS NAND gate One of the main problems with CMOS gates is their speed. They cannot operate very quickly, because of their inherent input capacitance. B-series devices help to overcome these 24 Lesson 3 CMOS Logic Circuit 25 limitations to some extent, by providing uniform output current, and by switching output states more rapidly, even if the input signals are changing more slowly. Note that we haven't gone into all of the details of CMOS gate construction here. For example, to avoid damage caused by static electricity, different manufacturers developed a number of input protection circuits to prevent input voltages from becoming too high. [3] However, these protection circuits don't affect the logical behavior of the gates, so we won't go into the details here. New Words and Phrases 1. CMOS abbr.

略语互补金属氧化物半导体(complementary metallic oxide semiconductor)逻辑,逻辑学,逻辑性,推理方法补充的,补足的,互补的电池供电的门电路,逻辑门,闸门,控制栅,大门,通道,门口,入口伏特,环骑,闪避基础的,基本的,主要的基本原则,基本原理增强型金属氧化物半导体场效应晶体管(metallic oxide semiconductor field effect transistor)反相器,反用换流器,变极器来源,水源,消息来源,原始资料,发起者源,源极排水沟,消耗,排水漏极排出,喝干,耗尽排水,流干,耗尽相同的,相配的,匹配的匹配有效地,有力地,事实上,实际上无限的东西无穷大无穷的,无限的,无数的,极大的接地的正向偏置的,正偏的或非 25 2。

A mathematical model for heat transfer of PCM in storage cell based on the enthalpy method was developed.

采用焓法,分析了蓄能相变材料相变区比热特性对其蓄换热性能的影响。

Mathematic model of the refrigeration system is presented with applying the distributed parameters method. In the models of condenser and evaporator, the flow patterns and its effects on the heat transfer coefficients of refrigerant side are considered.

采用分布参数的方法建立了制冷系统的数学模型,在建立冷凝器和蒸发器两相区模型时采用了分相流模型,并考虑了流型变化对制冷剂流动换热过程的影响。

Finally, the reaserch of two-phase frictional pressure drop both inside the tube and outside the tube is carried out.

文中也给出了冷凝换热时,煤油和水的两相换热系数的关联式。

The association effect of inert gas and gas phase acetic acid-water in condensing process was considered, the heat and mass transfer behavior of the heat exchangers at every step and the influence of heat and mass transfer on the design of heat exchangers were analyzed for the condensing process of acetic acid, water, and mixed nitrogen vapor in the condenser in the PTA oxidation process.

针对PTA氧化反应中冷凝器内的醋酸、水和氮气混合蒸气冷凝过程,考虑冷凝过程中惰性气体和气相醋酸-水缔合效应,分析了各级换热器内传热传质行为以及传递对换热器设计的影响。

During high pressure nitrogen quenching, besides the phase transformation process, the synthetic surface heat transfer coefficient is smooth. With increasing of nitrogen pressure, the synthetic surface heat transfer coefficient is improved.

计算结果表明,除相变阶段外,高压氮气淬火时的表面综合换热系数比较平稳,随着氮气压力的提高,表面综合换热系数呈总体增大趋势。2。

According to thermodynamic law of conservation of mass and energy and heat transfer theory, a group of differential equations on thermal balance of cover, thermal balance of indoor air, thermal balance of multi-layers of north wall, thermal balance of multi-layers of soil, thermal balance of multi-layers of north roof and thermal balance of plant were built.

该文建立了日光温室热环境模拟模型,定量描述了日光温室内的太阳辐射、对流换热、辐射换热、热传导、自然通风和水分相变带来的潜热对日光温室热环境的影响,根据质能平衡和传热学理论,得到一组关于覆盖物、室内空气、温室分层后墙、分层地面土壤、分层后坡和作物热平衡的微分方程组。

Based on the theoretical of ice slurry phase flow and heat transfer, established a heat transfer model of ice slurry flowing in horizontal pipes, at same time analyzed the effects of flow and ice packing fraction on heat transfer of fan and coil

在传统液固两相流的研究成果基础上,建立起二元冰在水平管内换热的数学模型,同时针对二元冰在风机盘管中的输送情况,分析了输送速度、含冰率对于二元冰换热的影响

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。