脉冲时间

Therefore, when counting the number of flow pulses to be pulsed method is more accurate measurement of time.

因此，在计数流量脉冲数时，以定脉冲测时间的方法更为准确。

According to the effect of relative permittivity εr on the pulse propagation velocity in lossy dielectric space and the effect on the turnround time of signal between the antenna and the buried objects, it is presented that lossy dielectric space can be transformed into free space and the simulation results abtained from free space can also be amended to lossy dielectric space.

对探地雷达的微波全息成像法进行了分析研究，根据有耗介质空间中的εr 对脉冲传播速度的影响，以及对脉冲在收发天线与目标之间的往返时间的影响指出：可将有耗介质空间转化到自由空间，再将自由空间中的计算结果修正到有耗介质空间。

It is found that the carrier phase and the parameter of sine function affect the pulse energy and the center of time gravity seriously when the pulse width is shorter than one optical oscillation period.

结果表明载波相位和正弦函数的参数对超短正弦高斯脉冲的脉冲能量和时间重心有很大的影响。

The appropriate propagation delays are 4.0ns for the unclamped pulse, and 4.8ns for the clamped (2X overdrive) pulse yielding an overdrive recovery time of 800ps.

适当的传播延迟为4.0ns的钳位脉冲，并4.8ns的钳制（2倍过载）脉冲产生的800ps过驱动恢复时间。

Objective To evaluate the application of impulse mode in the early stage of phacoemulsification.Methods Set impulse frequency at6-10/second when emulsifies the nucleus in150eyes.of131cases Linearly control the phaco power.Then analysis the phaco power,elapsed time and complication in three phases by turns.

目的 探讨脉冲乳化方式在超声乳化术初期阶段的应用方法对131例150眼白内障在乳化晶状体核时选用脉冲频率6～10次/s，线性控制能量，依序分三阶段进行分析所用超声能量、乳化时间以及并发症情况。

A commutation error is then considered in addition to the conventional residual error to generate the innovative residual error. Such an error is applied into cost functions to derive finite impulse response and infinite impulse response filter-based adaptive algorithms for ANC applications, referred to as FxRLS/CE and FuRLS/FRE+CE algorithms, respectively. Convergence analyses based on Lyapunov stability criteria for time-varying discrete-time systems can be carried out for the FxLMS/CE, FxRLS/CE and FuRLS/ FRE+CE algorithms to ensure stability. Computer simulations and experiments demonstrate that the innovative residual error-based adaptive algorithms can free the restriction of the slow-adaptation assumption in the conventional ANC approaches.

本文中也定义一交换误差并且加入到传统残留误差行形成新残留误差来改善适应性演算法的收敛速度，使用新残留误差推导出了有限脉冲响应滤波器与无限脉冲响应滤波器之适应演算法的新适应性演算法分别为： FxLMS/CE、 FxRLS/CE 和 FuRLS/FRE+CE 演算法，并且以离散时间的 Lyapunov 稳定性准则来证明演算法的收敛性，电脑模拟与实验也显示新演算法免除以往滤波器的参数必须缓慢更新的条件。

According to the initial density of a single-species with Allee effect,Chapter 3 presents two kinds of time-limited management models:the model with impulsive release and the model with impulsive harvest.

按照物种的初始密度，本章提出了两类具有Allee效应的单种群有限时间管理模型：脉冲投放模型和脉冲收获模型。

RESULTS: Patients, treaters, and raters were effectively masked. Minimal adverse effects did not differ by treatment arm, with an 88% retention rate (90% sham and 86% active).

干预措施：以120%的运动阈值（频率10赫兹，每系列持续4秒钟，其中每系列脉冲之间间歇26秒）时间为37.5分钟（每次治疗期间给与3000个脉冲），治疗仪器采用8字形固体核心线圈，假对照组采用的仪器是一个相似的线圈，将镍镉耐热合金插入其中以屏蔽磁场，阻止头皮电极传导双侧躯体本体感觉。

On this paper, the pulse electrochemical compound finishing technology parameters which influence the finishing surface roughness was paid attention to, such parameters include the pulse frequency, the duty factor, the peak voltage, the finishing time and so on. Then basic craft rule of two kinds of mold material in finishing process were obtained, and each kind of parameter in this craft was optimized by means of the orthogonal experiments.

在此基础上，重点考察了脉冲电化学复合光整加工过程中各工艺参数对光整后表面粗糙度的影响，如：脉冲频率、占空比、峰值电压、光整时间等，由此获得了这两种模具材料在整个过程中的基本工艺规律，并通过正交试验对光整加工中的各参数进行优化。

In the design of the system, one method of intelligent control is used which combines the Programmable Logical Controller and the Sensor, uses the shaft-type sensor to gather vehicles pulse and the high speed counter of the PLC to count the number of the pulse, uses certain principles of intelligent control to adjust the length of traffic lights automatically according to the data obtained, reduces the phenomenon of the vehicles stranded in a large scale, solves the problems of not equilibrium and unstable traffic flow magnitude well.

在系统的设计中，主要使用了PLC可编程序控制器和传感器相结合的一种智能控制方法，使用压轴式传感器采集车辆脉冲，用PLC高速计数器时脉冲进行计数，根据取得的数据运用一定的智能控制原则自动调节红绿灯的时间长度，最大限度地减少车辆滞留现象，较好地解决了车流量不均衡、不稳定问题。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。