Especially , paper research that the k - order rational b - spline function change to polynomial b - spline when h limit to 0 , + . last the spline function can be used to express the hyperbolic curves . then , when k = 3 , 4 , paper research the infection of curve because qi is changed 當形狀參數(shù)h 0 ~ + , +時, k階指定極點有理b樣條退化成多項式b樣條,最后還給出了雙曲線的精確表示
This paper has broaden the concept of maximum likehood estimate , put forward a new concept : so called " direction maximum likehood estimate " , and has proved the isosceles hyperbolic curve relationship of parameter , under the condition of normal distribution and logarithm normal distribution 摘要在本文中將極大似然估計的定義進行了推廣,提出了方向極大似然估計的新概念,并在正態(tài)分布、對數(shù)正態(tài)分布下證明了兩參數(shù)、的等腰雙曲線型關系。