...文 第五章 最大似然估计闭值法对超声回波消噪的研究 37-44 5.1 引言 37 5.2 脉冲回波信号的概率密度(Probability Density，PD)特征及最大似然估计(Maximum Likelihood Estimation，MLE)阈值处理 3...
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由于MQAM信号的概率密度函数服从莱斯分布，从而用莱斯分布来构造识别算法。
Because the probability density function of MQAM signal obeys L-S distribution, so it may construct the algorithm of discerning with L-S distribution.
根据信号、本底的时间分布以及时间、时间误差、质量、质量差等变量之间的关系，构建概率密度函数。
The probability density function (PDF) is constructed from the time distributions of signal and backgrounds and the relations among time, time uncertainty, mass, and mass difference variables.
利用概率密度技术捕捉声信号的微小变化，能够有效地识别气侵并报警。
The possibility density technology was used to entrap a little change of acoustical signal, which can discern the gas incursion and give the alarm efficaciously.
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