sine distribution meaning in English

正弦分布

In order to solve this problem , the distribution of the force was studied . with analyzing the data of ship launching , the paper educes seven typical distribution forms , include uniform distribution , sine distribution ( 1 / 2 amplitude ) , trapezoid distribution , right triangle distribution , sine distribution ( 1 / 4 amplitude ) , parabola distribution , isosceles triangle distribution
主要有七种分布形式，包括分布趋势较平缓的均匀分布形式、正弦( 1 2波形)分布形式、梯形分布形式；峰值出现在滑道最前端的直角三角形分布、正弦( 1 4波形)分布、抛物线形分布；还有峰值出现在分布区域中间的等腰三角形分布。