If you took the opposite vector field that contracts everything to the origin that will have negative divergence.
如果每点处取负的向量的话，就会得到负的散度了。
This value can be negative to extrude in the direction opposite the Face object's normal vector.
这个值可以为负，从而在Face对象的法向量的反方向上挤压。
Two types of digital negative sequence strainer using vector method and sampling method are researched in this paper.
本文对向量法和采样点计算法两种数字式负序滤过器进行研究。
The time-averaged Poynting vector gives the conditions for negative refraction that occurs at the interface, which are consistent with the analysis in crystal physics.
利用时间平均的坡印亭矢量，给出了在晶体和介质界面发生负折射的条件，与晶体物理学中的分析结果一致。
Because the learning support vector machine is an instructing learning, a negative algorithm is introduced. The negative result of facial feature is provided for the support vector machine learning.
针对支持向量机学习是一种有导师的学习，引入了否定算法，把人脸特征否定的结果来供支持向量机学习。
The concept of a new- style and high- precision fault component, synthetic negative sequence vector SNSV is proposed in the paper.
文中提出一种新型的、高精度的故障分量——综合负序矢量的概念 ，并给出综合三相负序分量的实时算法。
But it is very difficult to compute the number of non-negative matrix with fixed score row or column vectors, so to compute the number of tournament matrix with fixed score vector is also difficult.
竞赛矩阵和竞赛图由于具有固定行和向量及列和向量的非负矩阵类的计数，是组合数学的一个非常困难的问题，因此对具有固定得分向量的竞赛矩阵的计数问题也比较困难。
Objective to explore the possibility of using HBV as a gene delivery vector, and to test the anti-HBV effects by intracellular expression of dominant negative mutants of core protein.
目的探索H BV作为基因治疗载体的可能性及检验HBV点突变表达显性阴性突变体抗hbv的作用。
The method employed high-frequency voltage-signal injection to make motor form a high-frequency current-vector, of which the negative component current contained rotor space-position information.
该方法采用高频电压载波注入方式形成高频电流矢量，其负序分量包含了转子空间位置信息。
Virus without anti-Smad was served as negative control, and that without adenovirus vector was served as blank control.
以空载病毒作为阴性对照组，以无病毒载体作为空白对照组。
Virus without anti-Smad was served as negative control, and that without adenovirus vector was served as blank control.
以空载病毒作为阴性对照组，以无病毒载体作为空白对照组。
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