1) triangle replacement
三角替换
2) Trigonometrical transform
三角变换
1.
In this paper,the unified form of the trigonometrical transform which includes the discret sine transform,the discret cosine transform and the discret W transform are constructed,and we also discuss the orthogonality conditions of the discret Trigonometrical transform.
构造出了三角变换的一般形式,把离散正弦变换、离散余弦变换和离散W变换统一起来。
2.
Based on the unified form of the discrete trigonometrical transform,under orthogonality conditions,a kind of fast algorithms with halved structure is proposed,the parallel times being o(Nlog2 N).
根据离散三角变换的一般形式,在正交条件下,按频域分法提出了一类具有二分结构的快速算法,其运算量为o(Nlog2N)。
3) trigonomentrical substitutions
三角代换
1.
The paper explains with examples the limits on the degrees of intersectional angle in calculating indefinite integral by using trigonomentrical substitutions which belong to the second mathematical manipulation,and this operation doesn t change the definition of the function.
通过实例说明第二换元积分法使用三角代换对夹角范围的限制,没有缩小被积函数的定义域的范围。
4) Change ofTriangle Variable
三角换元
5) exchangeable cam;changeable cam
变换三角
6) interchangeable cam
互换三角
补充资料：替换
1.把原来的(工作着的人﹑使用着的衣物等)调换下来;倒换。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条