In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps.
在一些地方，水位正以每年一米的速度下降，需要定期加深井并使用更强大的水泵。
And points out that the periodic maintenance is great helpful to reduce the failure rate of CT.
并指出CT的定期保养对减少故障率有很大的作用。
For example, as a preparer or user, knowing that a zero-coupon bond matures in 10 years, how do you use the implicit interest rate to compute the periodic interest expense?
例如，无论你是制作者或是使用者，要是你知道一个零票息债券10年内到期，你会如何利用隐含利率去计算出每期间的利息支出呢？
Specifying the future value of an annuity based on periodic, fixed payments and a fixed interest rate.
数据类型值，指定按定期定额支付且利率固定的年金的未来值。
A hybrid robust repetitive control scheme is presented to reject position relevant periodic disturbance in rate system of turntable.
提出了一种混合形式的鲁棒重复控制方法，来抑制转台速率系统中存在的位置相关周期性扰动。
The results show that this method can efficiently restrain the rate ripple of the table caused by the periodic errors of position feedback elements, and can raise the rate stability of tables.
结果表明：该方法能够有效地抑制位置反馈元件周期性误差导致的速率波动，提高转台的速率平稳性。
The paper analyzes the periodic characteristics of China GDP increasing rate by means of minimal error analytical method and forecasts the GDP increasing rate in a few years.
利用最小偏差分析法，分析了我国GDP增长率的周期性特征，并对我国今后几年的GDP增长率进行了预测。
The movable side wall box-car has advantages of high automatic rate and short periodic time, it has widely used in the developed countries, such as America and England.
活动侧墙棚车在箱装货物及托盘货物运输中，具有机械化装卸效率高、车辆运转周期快的特点，目前在英、美等发达国家得到了日益广泛的应用。
Objective To study structure of the unstable periodic orbits (UPOs) of R-R interval signals of heart during orthostatic standing, and to reveal the dynamic characters of heart rate variability (HRV).
目的研究立位心脏R- R间期信号的非稳定周期轨道的结构，进一步探讨心率变异（HRV）的动力学特征。
The incidence rate of PIA in two groups was compared, and the general condition and periodic breathing of premature were observed.
同时观察两组早产儿的一般状况及周期性呼吸情况。
The spread spectrum (SS) signal is modulated by high-rate pseudo noise code, and belongs to typically periodic signal.
被高速伪随机码调制的扩频信号，其伪随机码是具有随机编码信号特征的周期信号。
This paper relates to the major problems in the decoder of the periodic bias signal added to the dithered laser gyro when used to measure micro angular rate.
本文讨论了激光陀螺抖动偏频解调与微小角速度检测的主要技术难点。
This paper present an improved method for analyzing the schedulability of periodic task sets under Rate Monotonic(RM) priority assignment.
在单调速率调度策略的基础上，提出一种改进的任务集可调度性判定算法。
This paper present an improved method for analyzing the schedulability of periodic task sets under Rate Monotonic(RM) priority assignment.
在单调速率调度策略的基础上，提出一种改进的任务集可调度性判定算法。
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