关于拉氏变换积分下限取值问题,目前大多数电工教材中都说明为了包括t=0时函数可能出现的冲激函数应将拉氏变换积分下限取为O_-。但目前仍有少数书籍采用下限为O,对于进行t为正值的单边拉氏变换来说这里的下限O实为O_+。这样当t=0函数有跃变时就产生了拉氏变换表达式的差异,主要表现为微分性质的差异(对于时域函数本来就包含有冲激函数时, About the Laplace transform integral lower limit value problem, at present most of the electrician textbook shows that in order to include the impulse function that t = 0 when the function may appear, the lower limit of Laplace transform integral should be taken as O_-. However, there are still a few books with a lower limit of O, and the lower limit O here is O_ + for unilateral Laplace transformations with positive value of t. So when the t = 0 function has a jump in the Laplace transform expression is generated, mainly for the differential nature of the difference (for the time domain function already contains an impulse function,