zero frequency的例句大全

In Fourier transform profilometry ( FTP), zero frequency of the captured patterns influences the measuring range and measuring precision, and even makes the reconstruction of three-dimensional surface incorrect.

在实际傅里叶变换轮廓术测量中，获取条纹图的零频分量对傅里叶变换轮廓术的测量精度和测量范围有很大影响，甚至妨碍三维面形的正确重建。

The new methods can rapidly and efficiently obtain the informations of a real sinusoidal signal's phase on time domain or frequency domain by zero-crossings or FFT transforming. The modified methods can extend the threshold SNR of frequency estimation, and it is easily implemented.

新的修改算法利用零交越或FFT变换，能快速有效地在时域或频域上得到实正弦信号的相位信息，改善了频率估计的SNR阈值，且便于工程实现。

The fuze is provided with some Anti-jamming function by means of instantaneous time average zero-over rate representing Doppler signal's frequency of continuous wave radio Doppler system fuze.

用短时平均过零率表征连续波多普勒体制无线电近炸引信多普勒信号频率，使引信具有一定的抗干扰能力。

The cyclic auto correlation and cyclic spectrum of the sampled sequence are derived, which become time average auto correlation and time average spectrum when the cyclic frequency is set to zero.

推导了样值序列的周期自相关和周期谱，当周期频率为零时，它们分别等于时间平均自相关和时间平均功率谱。

A phase shift converter can achieve zero voltage switching on the leading leg and zero current switching on the trailing leg by utilizing the reverse avalanche characteristics of IGBT. This circuit can provide low switching losses when IGBT is operating in high switching frequency.

利用IGBT的反向雪崩特性，实现伪相移变换器前臂零电压、尾臂零电流开关，使IGBT可在高开关频率下运行，且降低了开关损耗。

The dominant frequency of wavelet is estimated by using quality borehole-side seismic trace of migrated depth section, and zero phase wavelet is used here.

要在深度偏移剖面上选取品质较好的井旁地震道计算子波的主频，要选用零相位子波。

This work deals with the fundamentals of basic frequency band signal transmission sys-tem for well logging and analyzes the bipolar return-to-zero system and Manchester trans-mission system for well logging in detail.

本文介绍了基带传输系统的原理，并较详细地分析了用于测井的双流归零制基带传输系统和曼彻斯特传输系统。

When circumjacent load makes the lowest natural frequency zero, critical load is obtained.

当周边面力使夹层圆板的最低固有频率为零时，就可获得临界载荷的值。

During the IBW Pulses, the density fluctuation is suppressed markedly in the whole frequency domain and the local outward particle flux and heat flux induced by electrostatic fluctuation decrease to almost zero.

在离子玻恩斯坦波调制时，密度涨落被明显抑制，同时由静电涨落引起的向外的粒子通量和热通量减少到零。

Logarithmic Transformation to Joint Power Spectrum can enhance the intensity of high frequency component, improve the modulation degree, weigh down the zero-order diffraction, and increase the recognition efficiency of joint transform correlation system.

为增强联合功率谱的高频成分，改善其调制程度，可对功率谱进行对数变换，从而有效保留更多的高频成份，压低零级衍射光斑，提高联合变换相关器的识别能力。

In view of the distribution of different frequency in terms of phase-frequency characteristic, the polarity of zero sequence transient current in fault line is demonstrated to be opposite to those in healthy feeders in the selected frequency band ( SFB).

根据线路的相频特性将频率分为不同的区段，论证了在选定频段（SFB）内，小电流接地系统健全线路零序电流极性与故障线路相反；

The time-averaged speckle pattern of vibration can be described as a zero-order bessel function by high frequency modulation.

用数字散斑干涉术时间平均法测得的物体表面稳态振动，可描述为受高频分量调制的零阶Bessel函数。

Coupling capacitor C 13 has an effect on the slope of S curve. It will also have an effect on the contrast between the above half and the below half in the S curve and the frequency when S curve passes zero.

耦合电容C13除了影响S曲线的斜率外，还会影响S曲线上下半部的对称及S曲线过零点的频率。

This paper describes a software filtering method for eliminating industrial frequency interference in ordinary industrial process control with the aid of zero cross detection circuits. A detailed account of the filtering theory and its application is also given.

本文介绍了一种在一般工业过程控制中借助于过零检测电路来实现滤除工频干扰的软件滤波方法，阐述了其滤波原理与应用。

The stability of the inverted pendulum system is improved by introducing a high frequency signal with the average value equal to zero in the vertical direction of the bearing POint of the inverted pendulum, and then the inverted pendulum become vibrational stable at the inverted position.

通过在倒上摆支承点的垂直方向上加入一个零均值的高频振荡信号，改善了倒立摆系统本身的稳定性，使其在倒立位置附近成为一振荡稳定系统。

Experiments show that droplet transfer keep all to one-peak-zero-base type under controlling by this method as the welding parameter varies, such as peak current, base current and pulse frequency.

它是一种物理状态控制法。试验表明：当峰值电流、基值电流、脉冲频率等焊接参数改变时，本方法均能保持熔滴过渡为1峰0基的过渡。

an ideal excitation source would have an impulse function with frequency spectrum extends from zero to infinity and a constant amplitude.

理想激励源脉冲函数的频谱从零扩展到无穷大且有着恒定的幅值。

the transient vibration is reduced further for safety problems by the input shaping technique which utilizes zero placement method in the frequency domain to design multi-hump robust input shapers.

输入整形技术采用频域的零点配置方法设计多峰鲁棒输入整形器用来进一步减小负载的瞬时振荡，保障安全作业；

in addition, line mode and zero-mode voltage wave cross each other at the point of fault which causes the natural frequency "aliasing" .

此外，故障电压行波于非对称短路点发生线模与零模行波相互交叉透射，致使故障电压自然频率“混叠”。

preliminary inquiry of implementation of zero phase shift for frequency divider

分频器实现零相移的初步探讨