负指数分布又称指数分布。泊松事件流的等待时间（相继两次出现之间的间隔）服从指数分布。用于描述非老化性元件的寿命（元件不老化，仅由于突然故障而毁坏）。常假定排队系统中服务器的服务时间和Petri网中变迁的实施速率符合指数分布。
统计分析各优势组的节理间距，得出各优势组节理间距符合负指数分布。
The joint spacing of each set of joint is calculated and can be effectively fitted by negative exponential function.
叙述预测微通道板工作寿命试验过程，指出微通道板工作寿命曲线服从负指数分布。
A test for prediction of MCP life-time is described and it is pointed that the life-time curve of MCP depends on negative exponent distribution.
修理过程马上开始，经过一个负指数分布的修理时间后系统又重新进入正常工作状态。
A repair process then starts immediately, the system will back to the normal situation after a repair time which is exponentially distributed.
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