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with different shape parameters 参数α,β与二阶矩和四阶矩的关系如下式: , (4) 式中:σ2为方差;κ为峰度. 对于参数α和β的求解,本文采用最小化相对熵(relative entropy)或称作KL散度(Kullback-Leibler divergence)法.基本思想是通......
将会再次调整初始权重,以便得到更好的降维效果.其中针对初始权重的好坏,引用交叉熵(Cross entropy)进行评判.在预训练过程中得到的RBM连接起来并将其展开得到需要的Autoencoder,如图4所示. 2.2.3 微调过程 微调过程就是在预训练过程中得到初始权重后,对该权重进行进一步调整,主要采用交叉熵函数[13]评估以得出最优的权重.交叉熵是度量目标概率分布与实际概率分布之......
北电力大学学报, 2008, 35(6): 72-76. GU Yujiong, CHEN Kunliang, YANG Kun. Maintenance mode decision making for power plant equipment based on entropy and analytic hierarchy process[J]. Journal of North China......
变缓.在压力较小时,孔隙概率熵与压缩系数没有明显的相关性,主要受土体结构性影响.随着压力增加,孔隙概率熵与压缩系数呈正相关关系,概率熵越小,孔隙的排列越有序,结构越稳定,压缩性越低. 图10 孔隙概率熵随着固结压力的变化 Fig. 10 Variation of probability entropy on pressure 玫瑰图表示各个方向上的孔隙数分布,图11所示为......
based on entropy coefficient and ideal point method[J]. Journal of China Coal Society, 2010, 35(2): 218-221. [18] 冯少杰, 孙世国, 段伟国, 等. 边坡稳定性模糊数学评价方法的应用[J]. 煤矿安全, 2009(2): 53-55. FENG Shaojie, SUN Shiguo......
,测试与诊断, 2010, 30(1): 55-58. ZHANG Ping, ZHANG Xiaodong. Application of proof entropy in fault diagnosis of rotating machinery[J]. Journal of Vibration, Measurement & Diagnosis, 2010, 30(1): 55-58......
]. 计算机学报, 2004, 27(9): 92-97. LI Sujian, WANG Houfeng, YU Shiwen, et al. Research on maximum entropy model for keyword indexing[J]. Chinese Journal of Computers, 2004, 27(9): 92-97. [4] Nguyen T D......
Wenbin. Multi-objective comprehensive evaluation for performance of asphalt concrete pavement based on fuzzy entropy[J]. Journal of Central South University (Science and Technology), 2013, 44(8......
. Some new entropy measures for interval-valued intuitionistic fuzzy sets based on distances and their relationships with similarity and inclusion measures[J]. Information Sciences, 2014, 283(1): 55-69......
Xiaolong. Application of extension theory based on entropy weight to rock quality evaluation[J]. Rock and Soil Mechanics, 2010, 31(2): 535-540. [9] 刘爱华, 苏龙, 朱旭波, 等. 基于距离判别分析与模糊数学的岩体质量评判法[J]. 采矿与安全工程学报, 2011......