2) inversion formula of trigonometric sums
三角和反转公式
4) triangle cam
三角凸轮
1.
In this paper,microstructures of triangle cam made of steel Cr12MoV under various conditions were studied.
通过对不同加工状态下Ｃｒ１２ＭｏＶ钢三角凸轮样品显微组织的观察分析，提出较合理的加工工艺和方法。
5) 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)。
6) 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。
补充资料：30p式和30rp式12号霰弹枪
中文名称: 菲律宾30p式和30rp式12号霰弹枪
研制国别: 菲律宾
研制机构: 菲律宾枪械公司
分类: e922.17
关键词: 枪械 陆军装备 霰弹枪和防暴枪
简介
为了满足保安、执法人员防暴自卫的需要，菲律宾枪械公司对30r式和30dg式12号霰弹枪进行了改进，研制生产了30p式和30rp式霰弹枪，现已装备使用。
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