查询词典 null vector

It used chebyshev polynomials to calculate sine function for improving its accuracy. It adopted optimized null vector distribution strategy to decrease switching times and switching current.

其采用Chebyshev多项式计算三角函数，提高了运算精度；采用零矢量象限间交错分布的优化策略，以减小开关次数，降低开关电流。

Furthermore,a cost function which can null the noise compontnt of signal vector is presented.

设计了一个代价函数，满足此代价函数就可使信号向量在噪声子空间的投影为零。

The reason of unbalanced load voltage for station transformer in 220 kV substation was analyzed,the important influence of null line wirings in three-phase four-wire system on three-phase load voltage balancing was explained,and put forward a kind of simple,visual and practical vector analysis method.

分析一220kV变电站站用变压器负荷电压不平衡的原因，说明了三相四线制中的零线接线准确与否对负荷三相电压平衡性的重要影响，并提出了一种简单、直观的实用矢量图分析方法。

The vector pointer can also be set to NULL in which case a delta of (0,0 will be used.

矢量指针也可以设置为NULL，在这种情况下将使用(0， 0)的delta。

We can prove that there is only one null vector exists.

我们可以证明將只有一个零向量存在。

Simulation results show that it can improve the systems performance with low torque ripple, using the null vector rationally.

仿真结果表明，正确地使用零电压矢量能够有效减少转矩脉动，改善系统性能。

Null vector transfection as the control.

以空质粒转染组为对照。

A method based on the orthogonal property between signal subspace and noise subspace is proposed for robust adaptive beamforming. The robustness would be achieved by projecting the signal steering vector and the null constrain steering vector on signal subspace followed by LCMVB.

针对此情况，基于信号子空间与噪声子空间的彼此正交特性，对存在误差的信号导向矢量和干扰导向矢量，同时向信号于空间投影，然后对投影后的导向约束采用LCMV准则进行自适应波束形成。

An input phase voltage is divided into a main range and a transition range in which new P, M, N conditions and PM, NP, MN transition conditions are defined, some null vector is selected and the condition combination sequence of bidirectional power switches are adjusted in each modulation period to realize the safe, reliable and rapid commutation and the stable operation of the matrix converter.

本发明属于矩阵变换器控制技术，为一种用于矩阵变换器的控制方法，通过把输入相电压划分为主区间和过渡区间、在过渡区间定义新的P、M、N状态和PM、NP、MN暂态以及在每个调制周期内选择特定的零矢量并调整双向功率开关状态组合顺序，实现矩阵变换器安全、可靠、快速换流和稳定运行。

Null vector STZ-Ad.

Null载体STZ-Ad。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。