零位置

The structure and characteristic of the band-pass filter are analyzed,and parameters of components are calculated,and a Back-EMF zero-cross detection circuit for BLDC motor sensorless control is designed in this paper.

分析了带通滤波器的结构、幅频和相频特性，计算获得了符合要求的参数，设计了由带通滤波器构成的无刷直流电动机无位置传感器控制用反电动势过零检测电路，并给出了该检测电路的简化型式。

The sort of circumlocution is required in nearly every use of a method that returns null in place of a zero length array.

类遁辞在几乎在零的长度列阵位置退回零位对方法的每个用途需要。

After a power spectrum is constructed, empirical wavelet coefficients are used to detect the jump points in the function to obtain the strong consistent estimator of the position and number of the frequencies. Numerical simulations show this method is reliable.

根据它们的协方差函数可以表示为一个Fourier级数，而其Fourier系数可通过协方差函数的逆变换得到的特性，我们对于零均值的近周期相关序列构造了类似于周期图的函数，并构造其经验小波系数，利用频率处于此函数的尖点的特性，以及此性质在经验小波系数中的反映，来确定频率的个数和位置，所有的估计量都是强相合的，此外，数值模拟的结果表明，我们的方法是有效的。

The positions at cavity mirror of ray which propagates back and forth in the CCP laser resonator are analyzed, it shows that the CCP resonator with three equal dihedral angle errors (three dihedral angle errors are not 0) is an unstable resonator.

对在腔内往返传输的光线在镜面上的位置进行了分析，结果表明：3个二面角误差相同且不为零的角锥棱镜构成的谐振腔为约束非稳腔。

In last several years, there have been numerous publications on sensorless operation, but most of these techniques only rely on the fundamental machine equations, which limits the low speed and zero speed operation of the machine, and are sensitive to the machine parameters.

目前，永磁同步电动机无位置传感器控制技术的研究已经取得了丰硕的成果，但大多依赖于对电动机基波方程的分析，不适于低速及零速下应用，而且对电动机的参数非常敏感。

When the galvanometer reads zero the circuit is in the null-balance position.

当检流计的读数为零时，电路处于零平衡位置。

3 Indicator error calibration:示值误差校准: Take turns place the standard gauge blocks with measure 10mm,20mm,30mm,40mm,50mm in the middle of plane measure heads ,adjust the gauge block position , make the center plane and measure staff axes plane touch with gently, after tranquilization, read the display result .

依次将尺寸为 10mm，20mm，30mm，40mm，50mm 的标准量块放入平面测头之间，调整量块位置，使其中心面与测杆轴线面轻轻接触，待稳定后，读取显示结果，其示值误差应在±0.5um 内为合格，否则停用修理(每次测量块时，要重新清零)。

When defining an indentation different from 0, the position of the tabulation is not considered.

任何不是零的缩进的位置将被忽略。

Because changes in winter and summer tend to offset, the change in the annual average insolation at any given location is near zero, but the redistribution of energy between summer and winter does strongly affect the intensity of seasonal cycles.

因为变化冬季和夏季往往抵消，改变，年均日照在任何特定的位置是在零附近，但重新分配的能源之间的夏季和冬季并不强烈影响强度的季节性周期。

It is pointed out that the adaptive controller based on Lyapunov stability theory completes the integration of the square term caused by the integration of the multiplication term, and the integration of the square term is exactly the source of the slow-drift and its instability.

本文用均值平衡位置内摄动分析法，分析了有正态零均值噪音及有未建模动态时MRAC 的慢漂移。指出用Ляцунов稳定性理论或超稳定性理论设计的自适应控制器中，完成相乘项和平方项的积分，是MRAC慢漂移及慢漂移不稳定的根源。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。