Especially the way of zero vector by turns of switch frequency optimized modulation has lower device switching frequency and lower harmonic of output voltage .

其中尤其是开关频率优化中的 零矢量交替相 移空间 矢量法具有开关频率更低，输出电压谐波更小的特点；

Based on zero sequence injection or modulation waves decomposition two neutral point feedback control strategies are proposed . Using the two strategies not only output voltage can be guaranteed no distortion but also neutral point voltage can be adjusted at will .

提出了基于 调制波分解和基于 零序注入的两种中点电位反馈控制策略，在保证输出交流电压无畸变的同时还能实现中点电位的任意调节。

In order to reject the zero sequence and negative sequence disturbance due to unbalanced load a solution using two-stage four-leg matrix converter based on carrier modulation strategy was proposed .

为了抑制不平衡负载中的 零、负序扰动，提出一种基于载波 调制的双级四脚矩阵变换器解决方案。

Modulation signals have peak value at zero frequency section and the noise was no significant peak in the section we can use this characteristic to distinguish the noise and modulation signal . By calculating the ratio of maximum and average signal to determine whether exist signals .

该算法根据调制信号在 零频率的循环谱截面存在峰值，而噪声在该截面无明显峰值这一特点来区分噪声和 信号，通过计算该截面的最大值与均值的比例来判断是否为信号。

The Gap Zero Code at Delta Modulation System and Its Suppression

增量 调制系统的间隙 零码及其抑制方法

Introduces the principle of over zero modulation communication and the application of long-distance copy record of meter system .

介绍了工频过 零 调制通信的基本原理，及以该技术为核心的远程抄表系统的应用。

By using multiple scale method the two-dimensional nonlinear Klein-Gordon equation is discussed . In zero order a NLS equation for the amplitude is obtained . By analysing the modulation stability of the solution the envelop solitary waves solution is got for the NLS equation .

利用多重尺度分析法，对二维非线性Klein-Gordon方程作了摄动分析，推导出了 零阶近似解的振幅NLS方程，并对解的 调制稳定性进行了分析，求出了该问题的包络孤立子解。

In this paper the principles and application of DC-DC positive active clamp has been introduced and the zero voltage switching-pulse width modulation is also included .

介绍DC-DC正激式有源钳位 零电压开关-脉宽 调制 变换器（ZVS-PWM）的工作原理及其应用。

The wavelength conversion of 2.5 Gbit / s non return to zero optical pulse based on cross gain modulation in semiconductor optical amplifier is demonstrated .

采用半导体光放大器（SOA）的交叉增益 调制进行了25Gbit/s的非归 零码光脉冲的波长变换。

The paper presents a novel ultra-audio frequency ( UAF ) induction welding power based on ZCS-PWM ( Zero Current Switching-Pulse Width Modulation ) technology .

介绍一种基于ZCS-PWM（ 零电流开关-脉宽 调制）技术的新型超音频感应焊接电源。

This scheme introduces zero voltage resonant technology of pulse width modulation and phasing resonant controller UC3875 and its application in power converter .

介绍了相移脉宽调制 零电压谐振技术和相移 脉宽 调制谐振控制器UC3875的性能及其在功率变换中的应用。

It is obvious that seven segments modulation and zero vectors alternation modulation PS-SVPWM can reach an effect of higher equivalent switching frequency through counteracting lower order harmonics so it has a perfect performance on harmonic feature .

通过研究证明，七段法和 零矢量交替等 PS-SVPWM能够在较低的器件开关频率下实现较高开关频率的效果，通过低次谐波的相互抵消提高等效开关频率，具有良好的谐波特性。

Zero voltage switching is realized for all switches over a large load range by using an inductor and the leakage inductance of a high frequency transformer . The diode reverse recovery is also reduced with zero current switching with pulse-width modulation control .

在电感和变压器漏感的作用下，变换器中的开关元件能够在较大的负载范围内实现零电压开关，同时在脉宽 调制的控制下，二极管实现了 零电流关断。