环电流

When circuited in this manner, there is virtually no current draw until a ring signal is present.

当以这种方式短路，几乎没有电流消耗，直到一环信号存在。

The main content consists of the following aspects: The essential techniques of rate control are introduced, such as the principle of rate detection by quartz crystal﹑the relationship between filament emission current and filament temperature﹑the temperature dependence of material evaporation characteristic﹑the electron beam focalizing characteristic and the theory of rate closed-loop control.

主要内容包括以下几个方面：围绕电子束蒸发速率控制综合了速率控制的相关技术，比如蒸发速率石英晶振探测的原理﹑灯丝发射电流与灯丝温度的关系﹑膜料蒸发特性与蒸发温度的关系﹑电子束焦斑聚焦特性及速率闭环控制的原理。

In this study,the muscarinic current was induced by carbachol(50 umol/ L) or GTPYB(0.5 mmol/L).The results showed that hyposmotic superfusate(202mOsmol/ L) increased carbachol-induced current by 145士27%and increased GTPYS-induced current by 183士30%;but in the presence of cytochalasirr B(cyt- B,20 umol/ L),an actin cytoskeleton disrupter,posmotic membrane stretch increased 1CC6 by 70士6%.However,hypos motic membrane tretch induced increase in 1CC6 was potentiated to 545士81% by phalloidin(20 umol/ L),an actin microfilament stabilizer.

当豚鼠胃窦平滑肌细胞的膜电位钳制在一20 m V时，灌流液中50umol/ L卡巴胆碱(carbachol ， CCh)或电极内液中0.5 mmol/L GTPYS均可引导毒覃碱电流，2 m Os mol/ L分别使其增加145士27%和183士30；当电极内液中加入20 umol/ L的细胞松弛B时，低渗牵张使1 cce只增加70士6；而电极内液中加入20 umol/ L的鬼笔环肤则使Icce增加了545士81。

The magnet is levitated by eddy currents induced in the ring by the approaching magnet.

导体环中由变化磁场感生的电流使磁铁悬浮了起来。

Moreover, based on small signal analysis method, the equivalent small-signal model of the main circuit is achieved, and the system transfer function is established by predigesting the double control loop to a single one. On the basis of transfer function, the frequency characteristic of the system is analyzed and the compensator is designed. Emulation results show a good dynamic characteristic of the closed system.

同时，采用小信号分析的方法，建立了开关电源主电路的等效小信号模型，并通过将电流电压双环控制系统转化为单环控制系统获得了开关电源系统的传递函数，在分析系统频率特性的基础上设计了系统的补偿器，仿真结果表明，补偿后的系统具有良好的动态特性。

There occurred "sediment upturning" phenomenon in treatment of mine tail water in a mining water treatment plant,and the cause was analyzed.

某矿区自来水厂在处理矿井尾水时出现了&翻池&现象，分析了产生&翻池&的原因，介绍了对原水进行混合、缓冲、稳流，增设流动电流与浊度双闭环加流量前馈控制的自动加药系统，投加助凝剂等一系列对策，以及达到的效果。

By locking laser frequency to atomic absorption spectrum through current negative feedback and locking microwave frequency to electromagnetic induced transparency resonance peak through voltage negative feedback, it is realized to lock the clock frequency of this laboratorial desktop experimental CPT frequency standard.

通过采用电流负反馈将激光频率锁定在原子对激光的吸收峰上，电压负反馈将微波频率锁定在电磁感应透明共振峰上，用该物理系统实现了闭环锁定的实验室桌面CPT频标实验系统。

By locking laser frequency to atomic absorption spectrum through current negative feedback and locking microwave frequency to electromagnetic induced transparency resonance peak through voltage negative feedback respectively, the locking of the clock frequency of this laboratorial desktop experimental CPT frequency standard is realized.

介绍了相干布居囚禁原子频标的小型、低功耗物理系统，并应用它开展实现了CPT原子频标的激光锁定、微波锁定方案的实验室研究。通过采用电流负反馈将激光频率锁定在原子对激光的吸收峰上，电压负反馈将微波频率锁定在电磁感应透明共振峰上，用该物理系统实现了闭环锁定的实验室桌面CPT频标实验系统。

In the study of output current closed-loop system, large and small signal models are proposed, and the models are suitable to the dynamic process of arc welding.

在电流闭环控制系统中，建立了适合弧焊动态过程的大、小信号模型。

Rated breaking current when load switch closed.

负荷开关额定闭环开断电流。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。