摘要：
例 1 Suppose that customers are in line to receive service that is provided sequentially by a server; whenever a service is completed, the next person 阅读全文
摘要：
### Exponential Distribution 随机变量$X$服从指数分布的参数为$\lambda$的密度函数是：$f(x) = \left\{\begin{align*} &\lambda e^{-\lambda x},\quad x\geq 0\\ &0,\quad else \end 阅读全文