The variation and transmit of the radial and tangential energy flow in the air gap of electrical machines are illustrated by analyzing the divergence of Poynting vector.

通过对坡印亭矢量的散度的分析，阐明了电机气隙中径向能流和切向能流的变化和传递。

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Therefore the maximum of the radial energy during the P-wave arrive appears in the direction of the first singular vector.

证明了资料矩阵的总能量可用奇异值的平方和来表达，以及P波到达的径向能量最大值在第一奇异向量方向出现。

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In this paper we discuss the important parameter the ocean surface current and raise an algorithm to generate the vector current map in terms of data from two pieces of radial current map.

针对海洋动力学重要参数-海流，利用两台雷达的海洋表面径向流图，来生成海洋表面矢量流图的算法，并给出计算机模拟的结果。

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It's good to have a vector pointing in the radial direction of length one.

所以引入这么一个模长为 1,方向沿圆心向外辐射的矢量作用很大

耶鲁公开课 - 基础物理课程节选

At each point, er is a different vector pointing in the radial direction of length one.

矢量 er 在每一点处都不同,方向都从圆心指向该点,模长为1

耶鲁公开课 - 基础物理课程节选