这不是对真实向量作叉乘，但还是起作用的。
I mean it is not an cross-product of actual vectors but it works the same way.
利用矢量运算中的内积算法和叉乘算法来推导有功功率和无功功率。
The inner product algorithm and cross multiply algorithm in the vector calculation are used to deduce active power and reactive power.
利用现有的公式对雅可比矩阵中的元素进行改写，将矢量叉乘变为矢量点乘。
After the formula of documents are used to rewrite elements of Jacobian matrix, the vector cross product is changed into the vector dot product in Jacobian matrix.
还有个很有趣的现象要注意一下，就是我们可以用乘积法则,对向量表达式求导，无论是点乘或叉乘。
OK, now, so there's an interesting thing to note, which is that we can use the usual product rule for derivatives with vector expressions, with dot products or cross products.
还有个很有趣的现象要注意一下，就是我们可以用乘积法则,对向量表达式求导，无论是点乘或叉乘。
OK, now, so there's an interesting thing to note, which is that we can use the usual product rule for derivatives with vector expressions, with dot products or cross products.
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