截断和绝对Student变量的一阶矩
First moments of the truncated and absolute Student's variates
摘要：
虽然其中一些已经是一个众所周知的推导，其余的可能已经在早期的出版物中获得，但本说明计算了在零处截断的学生变量和绝对（或折叠）学生变量的前两个矩。
英文摘要：
While some of the enclosed already is a well-known derivation, and the remaining may have been obtained in earlier publications, this note computes the first two moments of a Student's variate truncated at zero and of an absolute (or folded) Student's variate.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
