1) hyperbolic secant distribution
双曲线正割分布
2) hyperbolical-secant solution
双曲线正割解法
3) modified hyperbolic secant square probability distribution function
修正双曲正割函数平方概率分布
6) normal distribution curve
正态分布曲线
1.
The parametric drawing and inserting of a normal distribution curve;
正态分布曲线的参数化绘制与插入
2.
On the relations between the normal distribution curve and the taiji image and their physical significance;
论正态分布曲线与太极图的联系性及物理意义
3.
The normal distribution curve grade method of forest tree seeds was suggested in this paper, that is determine the rate of every grade according to the requirement from production, management and user of forest tree seeds, and determine the specific indexes of every grade by using the normal distribution value formula u=(x- x )/s .
林木种子的数理统计正态分布曲线分级方法,是根据生产、经营、使用者对林木种子质量要求,来确定各级比例,用求正态分布值公式u=(x-x)/s确定各级指标。
补充资料:正割函数
在y=secx中,以x的任一使secx有意义的值与它对应的y值作为(x,y).在直角坐标系中作出的图形叫正割函数的图象,也叫正割曲线.
y=secx的性质:
(1)定义域,x不能取90度,270度,-90度,-270度等值;
(2)值域,|secx|≥1.即secx≥1或secx≤-1;
(3)y=secx是偶函数,即sec(-x)=secx.图象对称于y轴;
(4)y=secx是周期函数.周期为2kπ(k∈z,且k≠0),最小正周期t=2π.
并附上很难找到的正割图象.
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