Semi entropy is a measure to characterize the indeterminacy of the uncertain random variable considering the values of the uncertain random variable which are lower than the mean.As important roles of semi entropy in ...Semi entropy is a measure to characterize the indeterminacy of the uncertain random variable considering the values of the uncertain random variable which are lower than the mean.As important roles of semi entropy in finance,this paper presents the concept of semi entropy for uncertain random variables.In order to compute semi entropy for uncertain random variables,Monte-Carlo approach is provided.As an application of semi entropy,portfolio selection problems are optimized based on mean-semi entropy mode.展开更多
提出了一种基于粒子群优化(PSO)算法的长短期记忆网络(LSTM)方法,对质子交换膜燃料电池(PEMFC)的电堆电压进行了退化预测。首先,分析了PEMFC的退化机理。然后,应用LSTM建立了电压退化预测模型,并采用Dropout层来防止过拟合以提高模型的...提出了一种基于粒子群优化(PSO)算法的长短期记忆网络(LSTM)方法,对质子交换膜燃料电池(PEMFC)的电堆电压进行了退化预测。首先,分析了PEMFC的退化机理。然后,应用LSTM建立了电压退化预测模型,并采用Dropout层来防止过拟合以提高模型的泛化能力。此外,使用PSO算法优化LSTM方法中的初始学习率和Dropout概率以提升预测效果。最后,使用IEEE 2014 Data Challenge Data的燃料电池实际老化数据进行验证。结果表明,本文方法可以精确地预测燃料电池的退化,相比于传统的LSTM方法,预测精度提升了50%。展开更多
文摘Semi entropy is a measure to characterize the indeterminacy of the uncertain random variable considering the values of the uncertain random variable which are lower than the mean.As important roles of semi entropy in finance,this paper presents the concept of semi entropy for uncertain random variables.In order to compute semi entropy for uncertain random variables,Monte-Carlo approach is provided.As an application of semi entropy,portfolio selection problems are optimized based on mean-semi entropy mode.
文摘提出了一种基于粒子群优化(PSO)算法的长短期记忆网络(LSTM)方法,对质子交换膜燃料电池(PEMFC)的电堆电压进行了退化预测。首先,分析了PEMFC的退化机理。然后,应用LSTM建立了电压退化预测模型,并采用Dropout层来防止过拟合以提高模型的泛化能力。此外,使用PSO算法优化LSTM方法中的初始学习率和Dropout概率以提升预测效果。最后,使用IEEE 2014 Data Challenge Data的燃料电池实际老化数据进行验证。结果表明,本文方法可以精确地预测燃料电池的退化,相比于传统的LSTM方法,预测精度提升了50%。