热力学遗传算"~-(therm odynamical genetic algorithms，简称TDGA)借鉴固体退火过程中能量与熵的竞争 模式来协调GA 中“选择压力”和“种群多样性”之间的冲突．然而TDGA 目前极高的计算代价限制了其应用．为了提 高TDGA的计算效率，首先定义一种等级熵(rating—based entropy,J~j称RE)度量方法，它能以较小的计算成本度量种 群中个体适应值的分散程度．然后引入分量热力学替换规则(component thermod)rnami

近似熵是系统复杂性测度很有效的一种方法，在医学、机械设备故障的诊断等方面得到广泛应用。近似熵复杂性测度具有计算简便，对时间序列长度等条件要求相对较低等优点，因而更具有实用价值，是水文非线性系统领域中的新型工具。-Approximate entropy is a measure of system complexity, a very effective way, in medicine, the diagnosis of mechanical equipment failures, etc. a

基于MATLAB的编写的近似熵算法ApEn，还可以进行后续改进，如快速近似熵算法。-Prepared based on approximate entropy MATLAB algorithm ApEn, it can also be subsequent improvements, such as fast approximate entropy algorithm.

该程序用于计算多种生理信号的非线性特征近似熵，对于解决提取特征提供了便利-The program is used to calculate a variety of physiological signal of the nonlinear characteristic of approximate entropy, to solve the extracted features convenience,,,,