For customers who can afford a relatively short term of database instance unavailability, scheduling downtimes at the time of week with the possible lowest impact could be an acceptable compromise.

The closing time of quick closing valve is the time that oil completely flows out of the piston vat.

在液流惯性阻力未知的情况下解决了速关阀关闭时间问题。即速关阀关闭的时间即为活塞缸中液体油完全排出的时间。

Results: After hypobaric hypoxia the number of NMDA mRNA positive neurons was decreased, the open probability of NMDA receptor was reduced, the open time constant was decreased, the close time constant was increased.

结果：胎鼠低压低氧后，NMDA受体数量和通道开放机率减少，通道开放时间常数减少，通道关闭时间常数增加。

The variation of negative pressures in seedling launching mechanism and the relationship of seedling dropping time and displacement with pressure were studied to determine the best opening and closing times of air sucking valve and seedling launching valve.

研究水稻钵苗有序移栽机投苗装置内部负压变化规律以及钵苗下落时间和位移关系，确定吸气活门、投苗活门的最佳开启和关闭时间。

General Motors and Ford are also closing some plants beyond the usual two-week end of year production break.

通用汽车和福特也准备在年终通常的两个星期停产时间外，再延长一些工厂的关闭时间。

Determination the Time of Ductal Closure in Healthy Newborn by Pulsed Doppler Echocardiography

健康足月新生儿动脉导管关闭时间的超声多普勒测定

Rats treated with newborn hypoxia or fetus hypoxia, the open probability of NMDA receptors channel in hippocampus neurons was reduced. Analyzed by Marquardt-LSQ fit, the open time constants was decreased, the close time constants is increased.

低氧幼鼠和孕鼠缺氧后所生子鼠海马神经元NMDA通道的开放机率下降，经单指数拟合后，通道开放时间常数减少，关闭时间常数增加。

When the turn-off time is controlled within 3-5 μ s, and the turn-on time is controlled about 2 μ s., most of the devices can work satisfactorily.

当关断时间控制在3到5微秒，开通时间控制在2微秒时，多数元件都能满意地工作。

Considering the influences of the thermally induced diffraction losses and the turn-off time of AO Q-switch on the dual-wavelength pulse, a rate equation model describing the actively Q-switched laser with AO modulator has been established.

在考虑到热致衍射损耗及声光开关时间对双波长调Q脉冲性能影响的基础上，给出了描述LD泵浦调Q双波长激光运转速率方程模型。

To the measurement of turn-off time of thyristor, the author puts forward a new approach based on the analysis of the traditional approach as well as on the study of the turn-off characteristic and turn-off pattern of thyristor.

本文简要介绍了晶闸管的关断特性和关断方式，并通过对晶闸管关断时间传统测量方法进行分析，提出了晶闸管关断时间测量的新方案。

The key technique of transient electromagnetic transmitter is to resolve the problem about the turn-off time and linearity of current impulse on high power projecting.

如何在大功率、大电感情况下实现电流脉冲短关断延时和下降沿高线性度是瞬变电磁发射机的关键问题。

So, how to improve the tradeoff relationship between turn-off time and forward voltage is a key problem in power devices.

因此，提高开关速度并改善正向导通电压和关断时间的折衷关系是这类器件的关键问题之一。

The results were that TX-KA101's its driving voltage is reasonable, have three-sect current protection, its soft turn-off time and over-current protect threshold value can be regulated.

测试结果表明，TX&KA101输出驱动电压合理，具有IGBT过流三段式保护，慢关断时间和过压保护阚值可调。

Infrared light emitting diode is used to deliver appropriate light pulse with a very short turn-off time in the range of 0.5~ 1 micro-s-econd.

利用红外发光二极管作为闪光源，获得了合适的光强和0.5～1微秒的短余辉。

Error voltage vector generated by dead-time, switching devices turn-on and turn-off time are introduced. Weakening methods that consist of decreasing carrier frequency and decreasing direct current bus voltage are educed.

给出因死区时间和开关器件开通、关断时间引起的误差电压矢量，依据误差电压矢量的表达式，采用降低载波频率和减小直流母线电压的方法削弱死区效应。

Whether the turn-on time of the same arm thyristors was uniform or not, the turn-off time was always identical.

无论导通时刻是否一致，同臂号晶闸管的关断截止时刻总是相同的。

Analyses on Turn-Off Time and On-State Voltage Drop of a New Type of Thin Emitter Thyristors with Low Loss and High Speed

新型低损耗快速薄发射极晶闸管关断时间和通态压降的分析

Having much less turn-off time, eliminating the current over-shot and improving the turn-off consistency, the proposed snubber is suitable as the load energy snubber of TEM transmitter.

实验证明，推荐电路具有关断延时短、正负脉冲一致性好、无过冲现象等特点，适宜于TEM发射机的负载能量吸收电路。

Therefore, the study of turn-off time of RSD and the improving of measurement accuracy is important on our application of RSD.

因此，有关关断时间检测的研究以及测量准确度的提高对我们应用RSD有着重要的意义。

KEY OFREINSTALL THE BACK-UP LAMP RELAY.

关闭开关.重新安装后上灯电路继电器.

Is the sender's posture open and friendly, or closed and cold?

发送者的姿势是开放的和友好的, 还是关闭的和冷淡的?