The mathematical models of mechanical system,thermodynamic system and electromagnetic system of a compressor driven by moving-magnet linear motor were established on the basis of the control method that piston s displacement is changed by changing the triac s time of flow.
通过控制三端双向可控硅的导通时间来控制活塞位移的方法,建立了动磁直线电机驱动的压缩机的机械系统、热力系统及电磁系统数学模型。
To bring“ wetland” advantage into full play by establishing“ green kidney” which is as important as“ green lung”； set up green“ time channel” by using pluralistic“ cultural meaning” of green space； realize the goal of“ introducing nature into city” with the ecological theory“ climax community”； use the existing laws and regulations on the guaranty of raising the green space to a new stage.
为迎接新世纪的到来，上海要创建具有地方特色的绿色空间，应充分发挥“湿地”优势，建成与“绿肺”同等重要的“绿肾”；运用多元化“文化内涵”的绿色空间优势建成绿色“时间通道”；依照生态学的“顶极群落”理论实施“把自然引入城市”的计划；用好已有的法律法规是绿色空间上新台阶的保证。
To achieve PFC,this mode divides the logical control into two parts,then it determines the prescribed maximum inductor current and the minimum inductor current respectively by constant turn-on time technology and the average inductor current signal.
将电路的逻辑控制分为两个相对独立的部分 ,分别利用恒导通时间控制技术和平均电感电流信号来确定电感电流的上限和下限 ,即可实现PFC 。
One simple and useful calibration method to evaluate the delay of channels of data acquisition system is introduced in this paper.
本文介绍了数据采集系统通道间延时的一种简单实用的评价方法,讨论了评价过程的误差来源,以及减小其评价误差的几种对策;同时,给出了评价过程的计算机仿真结果。
Research of the V~2 Control Method Based on Constant on Time
基于恒定导通时间的V~2控制方法研究
Theoretical and Experimental Research of 100 kA Microsecond Conduction Time Plasma Erosion Opening Switch;
100kA微秒导通时间等离子体融蚀断路开关理论和实验研究
Measurement of Interval for IGBT′s Close Delay Time
关于IGBT导通延迟时间的精确测量方法
A connection between two conductors that permits a flow of current.
接触两个导体之间可容电流通过时的接触
The Combining Models of Traffic Control and Guidance with Arrival Time Constraint;
有到达时间限制的交通控制与诱导结合模型
a measure of the amount of electric charge flowing past a circuit point at a specific time.
测量在一定时间内通过导体横界面的电量的单位。
"In a wire, electric current is a flow of electrons that have been dislodged from atoms and is a measure of the quantity of electrical charge passing any point of the wire per unit time."
导线中以电子为载荷子的电流是单位时间内通过导线任意一点的电荷量的量度。
News reports must be timely.
新闻报导的时间性强。
To select part of(a wave)for transmission, reception, or processing by magnitude or time interval.
电波传送选择波的一部分，用来传导、接收或通过电流量或时间间隔来操作
the peak hour,ie when the greatest number of people are travelling to or from work
高峰时间（上下班交通繁忙时间）
He hasn't come round yet. Could you try and straighten him out?
他一时想不通，你开导开导他好吗?
Short time counts
短时（间）交通量调查
I was held up by a traffic jam
交通堵塞耽误了时间，
The hematoma will usually subside in time.
血肿通常随时间消逝。
The rush hour traffic is murder.
高峰时间的交通真要命。
Normally B.A.or B.S.degree course work can be complete in four years.
通常需要四年时间。
There is heavy traffic during the rush hours.
上下班时间交通很繁忙。
Traffic is very heavy during the rush hour.
尖峰时间交通十分繁忙。
