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HSEGRL:一种分层可自解释的图表示学习模型

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计算机研究与发展 2024年第8期61卷 1993-2007页

作者：李平宋舒寒张园曹华伟叶笑春唐志敏处理器芯片全国重点实验室(中国科学院计算技术研究所) 北京100190 中国科学院大学北京100049 中国科学院大学南京学院南京211135

近年来,随着图神经网络(graph neural network,GNN)技术在社交、信息、化学、生物等领域的广泛应用,GNN可解释性也受到广泛的关注.然而,现有的解释方法无法捕获层次化的解释信息,同时,这些层次信息未能被充分利用以提升图分类任务的准确... 详细信息

近年来,随着图神经网络(graph neural network,GNN)技术在社交、信息、化学、生物等领域的广泛应用,GNN可解释性也受到广泛的关注.然而,现有的解释方法无法捕获层次化的解释信息,同时,这些层次信息未能被充分利用以提升图分类任务的准确率.基于这一问题,提出了一种层次化自解释的图表示学习(hierarchical self-explanation graph representation learning,HSEGRL)模型,该模型通过发现图结构中的层次信息进行图分类预测的同时,输出层次化的模型自解释结果.具体而言,针对图层次信息的发现设计了提取信息的基本单元——解释子,该解释子由提取节点特征的编码器获取层次化解释感知子图的池化层和抽取高阶解释信息的解码器组成.其中,为了准确提取层次化的解释子图,针对该模型的池化操作进行了解释感知优化设计,该设计通过评估模型的拓扑及特征重要性,层次化地筛选解释子图,实现分层自解释的同时完成图分类任务.HSEGRL是一个功能完备且便于迁移的图表示学习自解释模型,可以层次化综合考虑模型的拓扑信息与节点特征信息.在模型有效性验证层面,分别在分子、蛋白质和社交数据集上进行大量实验,实验结果表明所提模型在图分类任务中的分类准确率高于已有的先进的GNN自解释模型和GNN模型,并通过可视化分层解释结果的信息证明了该解释方法可信.

关键词：图表示学习图神经网络可自解释模型图拓扑消息传递机制

硫酸钠制备碳酸氢钠过程中Na_(2)SO_(4)-NH_(3)-CO_(2)-H_(2)O体系相平衡规律

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化工进展 2024年第3期43卷 1621-1629页

作者：胡洪远张洋张贺东范兵强郑诗礼汤吉海南京工业大学化工学院江苏南京211816 中国科学院过程工程研究所绿色过程与工程重点实验室战略金属资源绿色循环利用国家工程研究中心北京100190 郑州中科新兴产业技术研究院河南郑州450000

Na_(2)SO_(4)-NH_(3)-CO_(2)-H_(2)O体系相平衡规律的掌握,对硫酸钠高值利用制备碳酸氢钠过程的工艺优化有重要意义。本文采用等温溶解平衡法在101.3~1099.0kPa下303.15K、323.15K和343.15K时研究了Na_(2)SO_(4)-NH_(3)-CO_(2)-H_(2)O体系以及其子体系Na_(2)SO_(4)-NH_(3)-H_(2)O的液-固相平衡关系,并获得了Na_(2)SO_(4)-NH_(3)-H_(2)O体系以及SO_(4)^(2-)、CO_(3)^(2-)和HCO_(3)^(-)在Na_(2)SO_(4)-NH_(3)-CO_(2)-H_(2)O体系相平衡规律。研究结果表明,Na_(2)SO_(4)-NH_(3)-H_(2)O体系中氨对硫酸钠有强烈盐析作用,当温度低于305.55K时在氨的作用下,体系平衡固相以无水硫酸钠的形式存在。同时硫酸钠氨盐水溶液通入二氧化碳进行碳酸化可促进硫酸钠的溶解。低温、高压有利于促进硫酸钠氨盐水溶液的碳酸化,并提高硫酸钠向碳酸氢钠的转化率。

关键词：硫酸钠相平衡碳酸化氨气碳酸氢钠

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地铁杂散电流引起变压器直流偏磁抑制方法

电网技术 2024年第4期48卷 1700-1710,I0085页

作者：程新翔喻锟曾祥君倪砚茹唐雨杭韩炜智能电网运行与控制湖南省重点实验室(长沙理工大学) 湖南省长沙市410114 国网山西省太原供电公司山西省太原市030000

针对城市地铁运行时泄漏的杂散电流会引起沿线变压器直流偏磁问题,提出一种基于碳化硅PiN二极管的偏磁抑制方法。首先,建立杂散电流分布模型并采集现场地电位实测数据,明晰了地铁运行下城区整体大地电位的数值分布特点。然后利用碳化硅... 详细信息

针对城市地铁运行时泄漏的杂散电流会引起沿线变压器直流偏磁问题,提出一种基于碳化硅PiN二极管的偏磁抑制方法。首先,建立杂散电流分布模型并采集现场地电位实测数据,明晰了地铁运行下城区整体大地电位的数值分布特点。然后利用碳化硅PiN二极管在直流电压和故障电流下的电压阻断能力及电流导通特性,提出了基于碳化硅PiN二极管的变压器直流偏磁抑制电路结构与工作流程。最后基于PSCAD/EMTDC仿真平台搭建了城市电网110kV变电站主变直流偏磁仿真模型,验证了偏磁抑制方法故障电流导通能力和偏磁直流抑制效果。仿真结果表明:电网故障时,偏磁抑制方法瞬时导通,继电保护迅速动作跳闸;变压器实施偏磁抑制后,中性点直流电流被阻隔,磁滞回线、一次侧绕组电流及励磁电流畸变率降低,直流偏磁得到有效抑制。

关键词：杂散电流地表电位变压器直流偏磁碳化硅二极管偏磁抑制

Biological significance of RNA-seq and single-cell genomic research in woody plants

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Journal of Forestry Research 2019年第5期30卷 1555-1568页

作者： Wei tang Anna Y.tang College of Arts and Science East Carolina UniversityGreenvilleNC 27858USA University of North Carolina at Chapel Hill 101 Stadium DriveChapel HillNC 27514USA

RNA-seq and single-cell genomic research emerge as an important research area in the recent years due to its ability to examine genetic information of any number of single cells in all living *** knowledge gained from RNA-seq and single-cell genomic research will have a great impact in many aspects of plant *** this review,we summary and discuss the biological significance of RNA-seq and single-cell genomic research in plants including the single-cell DNA-sequencing,RNA-seq and single-cell RNA sequencing in woody plants,methods of RNA-seq and single-cell RNA-sequencing,single-cell RNA-sequencing for studying plant development,and single-cell RNA-sequencing for elucidating cell type *** will focus on RNA-seq and single-cell RNA sequencing in woody plants,understanding of plant development through single-cell RNAsequencing,and elucidation of cell type composition via single-cell *** presented in this review will be helpful to increase our understanding of plant genomic research in a way with the power of plant single-cell RNA-sequencing analysis.

关键词： Cell type composition Genomics Plant development Single-cell RNA-sequencing methods

基于分布式潮流控制器的海上风电系统谐波治理方法和控制策略

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电力系统自动化 2024年第2期48卷 20-28页

作者：唐爱红宋幸尚宇菲郭国伟余梦琪詹细妹武汉理工大学自动化学院湖北省武汉市430070 广东电网有限责任公司佛山供电局广东省佛山市528000

由于电力电缆的电容效应,海上风电经电缆汇集系统极易出现谐波谐振放大的现象,造成电能质量的下降。分布式潮流控制器属于基于电压源换流器的装置,在进行潮流调节的同时也能进行谐波治理。文中首先构建了海上风电系统的频域相关模型,基... 详细信息

由于电力电缆的电容效应,海上风电经电缆汇集系统极易出现谐波谐振放大的现象,造成电能质量的下降。分布式潮流控制器属于基于电压源换流器的装置,在进行潮流调节的同时也能进行谐波治理。文中首先构建了海上风电系统的频域相关模型,基于该模型分析了谐波谐振放大的原因;随后,采用了将分布式潮流控制器串入海上风电系统的谐波治理方式,推导并得到了含分布式潮流控制器的海上风电系统的谐波特性。基于该谐波特性,设计了一种控制策略。该策略通过控制分布式潮流控制器实时跟踪使并网点谐波电压幅值为零的谐波补偿电压,从而降低并网点的谐波电压含量。仿真结果表明,所提出的基于分布式潮流控制器的海上风电系统谐波治理方法和控制策略能够有效地降低并网点的谐波电压,改善电能质量。

关键词：海上风电电能质量谐波治理分布式潮流控制器变增量电导增量法

Mode crossing induced soliton frequency comb generation in high-Q yttria-stabilized zirconia crystalline optical microresonators

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Photonics Research 2022年第3期10卷 731-739页

作者： Guoping Lin tang Sun Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System School of ScienceHarbin Institute of TechnologyShenzhen 518055China Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

We demonstrate for the first time,to the best of our knowledge,the fabrication of high-Q crystalline optical microresonators from cubic yttria-stabilized zirconia(YSZ).Intrinsic Q factors up to 80 million are obtained,indicating an upper bound absorption coefficient of 0.001cm^(−1) for YSZ crystals at the telecom *** laser-scanned spectroscopy on a few-mode YSZ microresonator with a radius of 300μm,we find that the mode crossing effect in the case of weak coupling can induce a repelling disruption of free spectral range values between transverse mode *** of soliton and soliton crystals in such a YSZ microcomb platform operated in the normal dispersion regime is observed.A breathing comb behavior is also *** finding has enriched comb generation platforms with potential multidisciplinary capabilities linked to properties of YSZ crystals in superconducting films and sensors.

关键词： crystalline soliton mode

AnimeNet: A Deep Learning Approach for Detecting Violence and Eroticism in Animated Content

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Computers, Materials & Continua 2023年第10期77卷 867-891页

作者： Yixin tang Department of Cooperative Course of Performance Film&AnimationSejong UniversitySeoul05006Korea

Cartoons serve as significant sources of entertainment for children and ***,numerous animated videos contain unsuitable content,such as violence,eroticism,abuse,and vehicular *** content detection methods rely on manual inspection,which is resource-intensive,time-consuming,and not always ***,more efficient detection methods are necessary to safeguard young *** paper addresses this significant problem by proposing a novel deep learning-based system,AnimeNet,designed to detect varying degrees of violent and erotic content in *** utilizes a novel Convolutional Neural Network(CNN)model to extract image features effectively,classifying violent and erotic scenes in videos and *** novelty of the work lies in the introduction of a novel channel-spatial attention module,enhancing the feature extraction performance of the CNN model,an advancement over previous efforts in the *** validate the approach,I compared AnimeNet with state-of-the-art classification methods,including ResNet,RegNet,ConvNext,ViT,and *** were used to identify violent and erotic scenes within specific video *** results showed that AnimeNet outperformed these models,proving it to be well-suited for real-time applications in videos or *** work presents a significant leap forward in automatic content detection in animation,offering a high-accuracy solution that is less resource-intensive and more reliable than current *** proposed approach enables it possible to better protect young audiences from exposure to unsuitable content,underlining its importance and potential for broad social impact.

关键词： Computer vision animation deep learning classification attention mechanism

VR helicity density and its application in turbomachinery tip leakage flows

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Chinese Journal of Aeronautics 2022年第11期35卷 1-17页

作者： Yumeng tang Yangwei LIU School of Energyand Power Engineering Beihang UniversityBeijing 100083China National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics Beihang UniversityBejing 100083China State Key Laboratory of Aerodynamics China Aerodynamics Research and Development CenterMianyang 621000China

Helicity is an important quantity that represents the topological interpretation of vortices;however,helicity is not a Galilean *** this study,VR helicity density(HVR)is derived via taking the dot product of vorticity with the unit real eigen vector of the velocity gradient tensor when the complex eigenvalues *** analytical solution of HVR is derived to resolve it in a local pointwise manner,and the Galilean invariance of HVR is *** leakage flow structures in a direct numerical simulation of a tip leakage flow model and a delayed detached eddy simulation of a low-speed large-scale axial compressor rotor are extracted using helicity,eigen helicity density and HVR *** show that the utilization of HVR permits the identification and accentuation of concentrated *** identified by HVR appear in more connective *** in the case of helicity,the sign of HVR distinguishes between primary and secondary vortices,while eigen helicity density *** normalized HVR is superior to the normalized helicity density in locating the vortex axis,especially for the induced vortex ***,HVR is a strong candidate to replace the helicity density,especially when Galilean invariance is required.

关键词： Compressor Flow visualization Helicity Tip leakage flow Vortex identification Vortical flow

CFRP/Al抽芯铆钉单剪干涉配合的渐进损伤数值模拟研究

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复合材料学报 2024年第6期41卷 3258-3270页

作者：王兵兵周钊元金万军何超唐正强贵州大学机械工程学院贵阳550025 中国航空工业标准件制造有限责任公司贵阳550014

干涉配合在改善抽芯铆钉连接复合材料的力学性能方面具有较强优势。然而,干涉配合下抽芯铆钉的安装往往会导致碳纤维增强树脂复合材料(CFRP)层压板的损坏,削弱铆接接头的力学性能。本文采用了完整的抽芯铆钉模型,基于连续损伤力学、扩... 详细信息

干涉配合在改善抽芯铆钉连接复合材料的力学性能方面具有较强优势。然而,干涉配合下抽芯铆钉的安装往往会导致碳纤维增强树脂复合材料(CFRP)层压板的损坏,削弱铆接接头的力学性能。本文采用了完整的抽芯铆钉模型,基于连续损伤力学、扩展的三维破坏准则和应变率效应,通过有限元和Abaqus二次开发相结合的方法,研究了CFRP/Al单剪铆接中抽芯铆钉与连接孔的干涉量和铆钉的安装速度对复合材料损伤的影响。从模拟结果来看受安装速度的影响显著,安装阻力呈现出两个典型的阶段,分别由铝合金板、CFRP板与抽芯铆钉的摩擦产生造成。抽芯铆钉安装在干涉配合情况下,安装速度越大对于降低安装阻力十分有利。然而,过高的安装速度会导致孔壁的损伤增加,尤其在高干涉量下更明显。抽芯铆钉铆接接头的失效模式以CFRP损伤为主,并受干涉尺寸的影响显著。

关键词： CFRP 抽芯铆钉渐进损伤有限元分析干涉配合