1. This idea rooted in the
supposal that combustion pressure is a pulse force and the characters that waveform parameters are sensitive to pulse.
这思路来源于将柴油机作功冲程的爆发力近似看成一个脉冲激励的假设,以及波形参数对脉冲激励敏感的特点。
2. The event study is based on the
supposal that the market is effective, that is to say, the stock price reflects all the known public information.
事件研究方法是基于有效市场假设的,即股票价格反映所有已知公共信息。