标题： 基于内燃机内部压力实验时间序列的粗粒度熵的噪声水平估计 显示英文标题

标题： Estimation of a Noise Level Using Coarse-Grained Entropy of Experimental Time Series of Internal Pressure in a Combustion Engine

摘要： 我们报告在单缸火花点火发动机中的非周期性实验时间序列的压力结果。 实验是在不同负载水平下进行的。 我们通过计算连续循环中最大压力的变化来估计内部压力的噪声水平。 结果表明，燃烧的动力学是一个由噪声介导的非线性多维过程。 我们的结果表明，这样定义的内部压力中的噪声水平并不是负载的单调函数。 显示英文摘要

摘要： We report our results on non-periodic experimental time series of pressure in a single cylinder spark ignition engine. The experiments were performed for different levels of loading. We estimate the noise level in internal pressure calculating the coarse-grained entropy from variations of maximal pressures in successive cycles. The results show that the dynamics of the combustion is a nonlinear multidimensional process mediated by noise. Our results show that so defined level of noise in internal pressure is not monotonous function of loading.