那种矢量就叫做”零矢量“。
该系统用零矢量分割的准圆轨迹法生成pwm波形。
PWM wave is generated by splitting Zero vector quasi circular locus method.
同时随机化零矢量，通过约束保证平均开关频率等于采样频率。
Zero vectors are randomized with the sample frequency and the average switching frequency equals to sample frequency with some constraint.
本文研究了主震与若干余震的震源机制解，并应用零矢量方法确定了地震破裂面的走向。
In this paper the focal mechanism of the major shock and several aftershocks has been studied and the strike of seismic fracture has been also determined by means of null vector data.
在伽例略变换下，巧妙利用零矢量，给出了任意正交曲线坐标系中质点速度和加速度的矩阵表式方法。
Under Galilean transformations, expressions of Veloeities and accelerations in vertical curve Coordinates are derived by the ingenious use of Zero Vector and means of matrix.
提出了一种基于新型Z源逆变器的光伏水泵系统，阐述了Z源逆变器的工作原理及其带直通零矢量的SVPWM控制策略。
A photovoltaic pump system based on a new Z-source inverter, whose theory and control strategy of space vector pulse width modulation (SVPWM) with short through states were introduced.
空间矢量pwm控制技术中两个零矢量的不同分配方案会产生多种PWM方式，并且会对逆变器的控制特性产生重要影响。
In the space vector PWM technology a large number of PWM methods can be generated with different distributions of the two zero vectors which would have great influence on the inverter characteristic.
在空间电压矢量形成PWM波的基础上，通过两个零矢量作用时间的不同分配及调节各矢量作用顺序，形成了不同形式的相电压波形。
Based on the method of SVPWM, various forms of phase voltage waveforms are generated by adjusting the duty time of the two zero vectors and the duty order of every vector.
利用计算出来的速度反馈构成了速度闭环系统，并采用低通滤波方法减小误差，同时应用了零矢量调制控制法减小转矩脉动，提高了整个系统的控制性能。
Constituted the speed closed-loop system with the speed feedback, used the low pass filter method to reduce the error, so the overall system control performance is advanced.
另一方面，如果大多数矢量的大多数值都是非零的，则比较适合使用DenseVector。
On the other hand, if most values for most vectors are non-zero, then a DenseVector is more appropriate.
清单20中的函数返回矢量的矢量，这是因为每个文档都可能生成零到多个映射条目，而每个映射条目都被表示为一个矢量。
The function in Listing 20 returns a vector of vectors. This is because each document could generate zero to many map entries, and each map entry is represented as a vector.
就线性运动而论，如果作用于严格物体上的诸力的矢量之和是零，那么这个物体就处于平衡。
In so far as linear motion is concerned, a body is in equilibrium if the vector sum of the.
就线性运动而论，如果作用于严格物体上的诸力的矢量之和是零，那么这个物体就处于平衡状态。
In so far as linear motion is concerned, a body is in equilibrium if the vector sum of the forces acting upon it is zero.
双空间矢量调制两级协调控制能实现整流级零电流换流，极大地减少了开关损耗，提高了变换器的效率。
Double space vector modulation can realize zero current commutation of the rectifier side, greatly reduce the switch loss, and improve the efficiency of the converter.
分析了零电压矢量在不同转速范围内对转矩的减小作用，并设计了新的选择表。
New selecting tables are defined based on the effect of torque reduction caused by zero voltage vectors in different speed range.
针对平面拦截问题，选择导弹和目标之间的相对速度矢量与导弹-目标视线之间的夹角（称为相对航向误差角）作为将要被控制到零的输出。
For the case of planar interception, the so called relative heading error angle between the relative velocity vector and the LoS (Line of Sight) is chosen as the output to be controlled to zero.
提出了一种新的二维矢量数字地图的零水印算法。
A new zero-watermark copyright protection algorithm for 2d vector maps is proposed.
文中最后讨论了矢量中值滤波在零偏移距VSP资料处理中的应用和效果。
The paper fin- ally describes both the application of VMF to zero-offset VSP data processing and the effect.
针对四开关逆变器没有零电压控制矢量的特点，提出了回扫延时的概念。
In this method eight voltage controlling vectors are summarized, four vectors of which are selected to control a motor.
算法结合误差曲面特性以及运动矢量中心偏移特性，得到最佳参考运动矢量；利用运动矢量的方向和强度信息，确定搜索方向，切换搜索模式，搜索的同时应用全零块的中止准则。
It gets the best reference motion vectors from the error - surface and the center deviation characteristics, and it USES the direction and intensity information to choose the proper searching mode.
该方法一方面利用三阶累积量提高了抗噪性能，同时又使用非零奇异值矢量减少了存储量与运算量。
The third-order cumulant is used to improve the robustness to noise, and the singular value vector is used to reduce the memory and complicatedness. The…
该方法一方面利用三阶累积量提高了抗噪性能，同时又使用非零奇异值矢量减少了存储量与运算量。
The third-order cumulant is used to improve the robustness to noise, and the singular value vector is used to reduce the memory and complicatedness. The simulated experimental …
研究采用正负斜率交替的锯齿载波，成功地解决了主电路在任何电压矢量下都能实现零电压开关动作；
The saw-tooth carrier waves with positive or negative slope alternately are studied and applied into the three-phase PWM inverter soft-switching operation.
研究采用正负斜率交替的锯齿载波，成功地解决了主电路在任何电压矢量下都能实现零电压开关动作；
The saw-tooth carrier waves with positive or negative slope alternately are studied and applied into the three-phase PWM inverter soft-switching operation.
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