针对现有图嵌入方法损失函数来源单一导致节点表示不能被充分优化的问题,提出了基于同步联合优化的注意力图自编码器(attentional graph auto-encoder based on synchronous joint optimization,AGE-SJO)。设计基于注意力机制的编码器...针对现有图嵌入方法损失函数来源单一导致节点表示不能被充分优化的问题,提出了基于同步联合优化的注意力图自编码器(attentional graph auto-encoder based on synchronous joint optimization,AGE-SJO)。设计基于注意力机制的编码器学习节点表示,并利用内积解码器重建图结构生成重建损失(L_(R));为从多方面优化表示,将编码器和多层感知机分别作为生成模型和判别模型进行对抗训练,获得生成损失(L_(G))和判别损失(L_(D));提出同步联合优化策略,依次在L_(R)的k步、L_(D)的k步和L_(G)的1步之间优化表示,并将其应用于链路预测和节点聚类。在引文数据集上的实验结果表明,所提出的AGE-SJO性能优越,与最强基线相比,AUC、AP、ACC、NMI和ARI指标可分别提升1.6%、2.1%、10.6%、4.9%和12.4%。展开更多
Remarkable progress has been achieved on microseismic signal denoising in recent years,which is the basic component for rock-burst detection.However,its denoising effectiveness remains unsatisfactory.To extract the ef...Remarkable progress has been achieved on microseismic signal denoising in recent years,which is the basic component for rock-burst detection.However,its denoising effectiveness remains unsatisfactory.To extract the effective microseismic signal from polluted noisy signals,a novel microseismic signal denoising method that combines the variational mode decomposition(VMD)and permutation entropy(PE),which we denote as VMD–PE,is proposed in this paper.VMD is a recently introduced technique for adaptive signal decomposition,where K is an important decomposing parameter that determines the number of modes.VMD provides a predictable eff ect on the nature of detected modes.In this work,we present a method that addresses the problem of selecting an appropriate K value by constructing a simulation signal whose spectrum is similar to that of a mine microseismic signal and apply this value to the VMD–PE method.In addition,PE is developed to identify the relevant effective microseismic signal modes,which are reconstructed to realize signal filtering.The experimental results show that the VMD–PE method remarkably outperforms the empirical mode decomposition(EMD)–VMD filtering and detrended fl uctuation analysis(DFA)–VMD denoising methods of the simulated and real microseismic signals.We expect that this novel method can inspire and help evaluate new ideas in this field.展开更多
文摘针对现有图嵌入方法损失函数来源单一导致节点表示不能被充分优化的问题,提出了基于同步联合优化的注意力图自编码器(attentional graph auto-encoder based on synchronous joint optimization,AGE-SJO)。设计基于注意力机制的编码器学习节点表示,并利用内积解码器重建图结构生成重建损失(L_(R));为从多方面优化表示,将编码器和多层感知机分别作为生成模型和判别模型进行对抗训练,获得生成损失(L_(G))和判别损失(L_(D));提出同步联合优化策略,依次在L_(R)的k步、L_(D)的k步和L_(G)的1步之间优化表示,并将其应用于链路预测和节点聚类。在引文数据集上的实验结果表明,所提出的AGE-SJO性能优越,与最强基线相比,AUC、AP、ACC、NMI和ARI指标可分别提升1.6%、2.1%、10.6%、4.9%和12.4%。
基金supported by the National Natural Science Foundation of China(No.51904173)Shandong Provincial Natural Science Foundation(No.ZR2018MEE008)the Project of Shandong Province Higher Educational Science and Technology Program(No.J18KA307).
文摘Remarkable progress has been achieved on microseismic signal denoising in recent years,which is the basic component for rock-burst detection.However,its denoising effectiveness remains unsatisfactory.To extract the effective microseismic signal from polluted noisy signals,a novel microseismic signal denoising method that combines the variational mode decomposition(VMD)and permutation entropy(PE),which we denote as VMD–PE,is proposed in this paper.VMD is a recently introduced technique for adaptive signal decomposition,where K is an important decomposing parameter that determines the number of modes.VMD provides a predictable eff ect on the nature of detected modes.In this work,we present a method that addresses the problem of selecting an appropriate K value by constructing a simulation signal whose spectrum is similar to that of a mine microseismic signal and apply this value to the VMD–PE method.In addition,PE is developed to identify the relevant effective microseismic signal modes,which are reconstructed to realize signal filtering.The experimental results show that the VMD–PE method remarkably outperforms the empirical mode decomposition(EMD)–VMD filtering and detrended fl uctuation analysis(DFA)–VMD denoising methods of the simulated and real microseismic signals.We expect that this novel method can inspire and help evaluate new ideas in this field.
