汉英词典
Chinese-English Dictionary
MEANING OF 數量積
數量積 (数量积)
scalar product (of vectors)
又称内积”、点积”,物理学上称为标量积”。两向量a与b的数量积是数量|a|·|b|cosθ,记作a·b;其中|a|、|b|是两向量的模,θ是两向量之间的夹角(0≤θ≤π)。
() shù/shǔ/shuò liàng/liáng () jī
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