一个 正整数 的阶乘(factorial)是所有小于及等于该数的正整数的积,并且0的阶乘为1。 自然数 n的阶乘写作n!。1808年,基斯顿·卡曼引进这个表示法。 亦即n!=1×2×3×...×(n-1)×n。阶乘亦可以递归方式定义:0!=1,n!=(n-1)!×n。 反馈
Factorial函数主要用来求一个正整数的阶乘,它返回一个整数。例如,求5的阶乘值,只要输入5,则返回120。 Power函数主要用来计算一个数的乘方,它返回一个浮点型数字。例如,求4的3次方,只要输入4和3,则结果为64。 Round函数用来对一个浮点型数字进行四舍五入,它返回一个浮点型数字。例如,我们可以用此函数将3.1415进...
2007-01-10 14:26:14 ms结果已经出来了 赞 回复 方言即文化 楼主 2007-01-10 14:36:23 http://www.luschny.de/math/factorial/fffcalc.html click几下就行了 赞 回复 你的回复 回复请先 登录 , 或 注册 砳砳!海宝!大作战! 2081 人聚集在这个小组 加入小组 相关内容推荐 文化宫|《Buried ...
Basically, I*J*K factorial design有三个treatments,每个有I,J,K个levels. 最好保持intervention数量比较低,否则很可能出现interaction。除非确定不存在interaction,才能使用很多interventions. Incomplete or partial factorial design: 可能因为某些研究原因或道德原因,某些combination of interventions不能测量,因此这个cell就...
Factorial validity and invariance of the GHQ-12 among clinical and nonclinical samples. Assessment. 2012;20(2):219–29. https://doi.org/10.1177/1073191112465768. Article PubMed Google Scholar Hankins M. The factor structure of the twelve-item general health questionnaire (GHQ-12): the result ...
#!/usr/bin/env python3 from fractions import Fraction B=[Fraction(1),Fraction(-1,2)] def factorial(n): if n==0: return 1 return n*factorial(n-1) def binom(n,k): return Fraction(factorial(n),factorial(k)*factorial(n-k)) def next_bernoulli(): r=len(B) # Assume r>1 s=0 ...
The 12-item version of the General Health Questionnaire (GHQ-12) has become a popular screening instrument with which to measure general psychological health in different settings. Previous studies into the factorial structure of the GHQ-12 have mainly supported multifactor solutions, and only a few...
Using a confirmatory factor analysis, this study examined the factorial validity of the SF-12 (version 2) in a sample of 287 African American adults from a family medicine practice in a low-income neighborhood. Findings indicated a good-fitting two-factor model, with three cross-loadings and ...
Factorial structure of the Chinese version of the 12-item General Health Questionnaire in adolescents Aims. To evaluate the underlying factor structure of the Chinese version of General Health Questionnaire-12 using exploratory and confirmatory factor analy... W Li,J Chung,M Chui,... - 《Journal...
The factorial structure of the GHQ-12 This paper studies the factorial structure of the 12-item version of the General Health Questionnaire (GHQ-12), Dutch translation, in a large Belgian sampl... S Vanheule,S Bogaerts - 《Stress & Health》 被引量: 12发表: 2005年 The factorial structure...