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Aspect-level sentiment analysis based on semantic heterogeneous graph convolutional network

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Frontiers of Computer Science 2023年第6期17卷 87-99页

作者： Yufei ZENG zhixin li Zhenbin CHEN Huifang MA Guangxi Key Lab of Multi-source Information Mining and Security Guangxi Normal UniversityGuilin 541004China College of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China

The deep learning methods based on syntactic dependency tree have achieved great success on Aspect-based Sentiment Analysis(ABSA).However,the accuracy of the dependency parser cannot be determined,which may keep aspect words away from its related opinion words in a dependency ***,few models incorporate external affective knowledge for *** on this,we propose a novel architecture to tackle the above two limitations,while fills up the gap in applying heterogeneous graphs convolution network to ***,we employ affective knowledge as an sentiment node to augment the representation of ***,linking sentiment node which have different attributes with word node through a specific edge to form a heterogeneous graph based on dependency ***,we design a multi-level semantic heterogeneous graph convolution network(Semantic-HGCN)to encode the heterogeneous graph for sentiment *** experiments are conducted on the datasets SemEval 2014 Task 4,SemEval 2015 task 12,SemEval 2016 task 5 and ACL 14 *** experimental results show that our method achieves the state-of-the-art performance.

关键词： heterogeneous graph convolution network multi-head attention network aspect-based sentiment analysis deep learning affective knowledge

Efficient multi-scale community search method based on spectral graph wavelet

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Frontiers of Computer Science 2023年第5期17卷 89-101页

作者： Cairui YAN Huifang MA Qingqing li Fanyi YANG zhixin li College of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China Guangxi Key Lab of Multi-source Information Mining and Security Guangxi Normal UniversityGuilin 541004China

Community search is an important problem in network analysis,which has attracted much attention in recent *** a query-oriented variant of community detection problem,community search starts with some given nodes,pays more attention to local network structures,and gets personalized resultant communities *** existing community search method typically returns a single target community containing query nodes by *** is a strict requirement and does not allow much *** many realworld applications,however,query nodes are expected to be located in multiple communities with different *** address this limitation of existing methods,an efficient spectral-based Multi-Scale Community Search method(MSCS)is proposed,which can simultaneously identify the multi-scale target local communities to which query node *** MSCS,each node is equipped with a graph Fourier multiplier *** access of the graph Fourier multiplier operator helps nodes to obtain feature representations at various community *** addition,an efficient algorithm is proposed for avoiding the large number of matrix operations due to spectral *** experimental evaluations on a variety of real-world datasets demonstrate the effectiveness and efficiency of the proposed method.

关键词： community search multi-scale spectral wavelets

Community detection with attributed random walk via seed replacement

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Frontiers of Computer Science 2022年第5期16卷 45-56页

作者： Yang CHANG Huifang MA liang CHANG zhixin li College of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China Guangxi Key Lab of Multi-source Information Mining and Security Guangxi Normal UniversityGuilin 541004China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China

Community detection methods based on random walks are widely adopted in various network analysis *** could capture structures and attributed information while alleviating the issues of *** random walks on plain networks have been studied before,in real-world networks,nodes are often not pure vertices,but own different characteristics,described by the rich set of data associated with *** node attributes contain plentiful information that often complements the network,and bring opportunities to the random-walk-based ***,node attributes make the node interactions more complicated and are heterogeneous with respect to topological ***,attributed community detection based on random walk is challenging as it requires joint modelling of graph structures and node *** bridge this gap,we propose a Community detection with Attributed random walk via Seed replacement(CAS).Our model is able to conquer the limitation of directly utilize the original network topology and ignore the attribute *** particular,the algorithm consists of four stages to better identify communities.(1)Select initial seed nodes in the network;(2)Capture the better-quality seed replacement path set;(3)Generate the structure-attribute interaction transition matrix and perform the colored random walk;(4)Utilize the parallel conductance to expand the *** on synthetic and real-world networks demonstrate the effectiveness of CAS.

关键词： community detection seeds colored random walk parallel conductance

Simulation of tin penetration process in the surface layer of soda-lime-silica float glass

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Science China(Technological Sciences) 2011年第3期54卷 691-697页

作者： ZHANG Qin CHEN ZeJing li zhixin Key Laboratory of Thermal Science and Power Engineering of Ministry of Education School of Aerospace Tsinghua University Beijing 100084 China

Based on the analysis of tin penetration mechanism in the float glass process, the oxidation model of stannous ion is constructed considering the oxygen activity and the redox reaction in the glass surface layer. The calculation of stannous ion's oxidation rate makes it possible to predict both stannous and stannic ion's concentrations independently. And it is also the necessary precondition for the numerical verification of tin penetration mechanism. Coupled diffusion simulation method is established to simulate the penetration process of both stannous and stannic ions simultaneously. The result shows that when the green glass is formed in the reducing atmosphere in tin bath, the stannic ion is accumulated at the position where oxygen activity changes sharply. Satellite peak (internal local concentration maximum) occurs in the tin concentration profile of green glass, which is quite different from that in low iron glass. Compared with gradually cooling temperature regulation, the tin penetrated shifts to greater depth and the depth and magnitude of the satellite peak also increase when reheating temperature regulation is applied. In order to reduce the amount of penetrated tin, the residual time in the high temperature region should be shortened.

关键词： float glass tin penetration satellite peak

Entransy-dissipation-based thermal resistance analysis of heat exchanger networks

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Chinese Science Bulletin 2011年第31期56卷 3289-3295页

作者： QIAN XiaoDong li Zhen li zhixin Key Laboratory of Thermal Science and Power Engineering of Ministry of Education School of Aerospace Tsinghua University Beijing 100084China

Heat exchanger network optimization has an important role in high-efficiency energy utilization and energy conservation. The thermal resistance of a heat exchanger network is defined based on its entransy dissipation. In two-stream heat exchanger networks, only heat exchanges between hot and cold fluids are considered. Thermal resistance analysis indicates that the maximum heat transfer rate between two fluids corresponds to the minimum entransy-dissipation-based thermal resistance; i.e. the minimum thermal resistance principle can be exploited in optimizing heat exchanger networks.

关键词：换热网络最小热阻耗散基础网络优化节约能源能源利用传输速率

Entransy dissipation analysis and optimization of separated heat pipe system

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Science China(Technological Sciences) 2012年第8期55卷 2126-2131页

作者： QIAN XiaoDong li Zhen MENG JiAn li zhixin Key Laboratory of Thermal Science and Power Engineering of Ministry of Education School of AerospaceTsinghua UniversityBeijing 100084China

Seperated heat pipe systems are widely used in the fields of waste heat recovery and air conditioning due to their high heat transfer capability,and optimization of heat transfer process plays an important role in high-efficiency energy utilization and energy *** this paper,the entransy dissipation analysis is conducted for the separated heat pipe system,and the result indicates that minimum thermal resistance principle is applicable to the optimization of the separated heat pipe *** in the applications of waste heat recovery or air conditioning,the smaller the entransy-dissipation-based thermal re-sistance of the separated heat pipe system is,the better the heat transfer performance will *** on the minimum thermal resistance principle,the optimal area allocation relationship between evaporator and condenser is deduced,which is numeri-cally verified in the optimation design of separated heat pipe system.

关键词： separated heat pipe system entransy-dissipation-based thermal resistance minimum thermal resistance principle area allocation optimization

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基于异构系统的OTA升级优化研究

电子设计工程 2025年第1期33卷 160-165页

作者：吴怀仁车龙李志新广州汽车集团股份有限公司广东广州510656

针对异构系统在升级时面临的多系统并发升级往往耗时较长,会加重用户等待负担的问题,采用OTA升级技术进行优化。通过对升级流程的深度革新,提出了基于A核与M核并行刷写,且M核的Norflash擦写采用流控并发的方法。通过实验证明,提出的方... 详细信息

针对异构系统在升级时面临的多系统并发升级往往耗时较长,会加重用户等待负担的问题,采用OTA升级技术进行优化。通过对升级流程的深度革新,提出了基于A核与M核并行刷写,且M核的Norflash擦写采用流控并发的方法。通过实验证明,提出的方法可有效缩短异构系统升级时间,确保在各种电量条件下都能高效安全地完成升级任务,为智能汽车的OTA升级体验带来了实质性的改善。

关键词：智能汽车汽车电子架构异构系统 OTA 升级时长

Effect of blank quenching on shear spinning forming precision of 2219 aluminum alloy complex thin-walled components

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Chinese Journal of Aeronautics 2023年第4期36卷 538-555页

作者： zhixin li Mei ZHAN Xiaoguang FAN Yunda DONG Luopeng XU School of Science Civil Aviation Flight University of ChinaGuanghan 618307China State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of High-Performance Precision Forming

The quenching-spinning(Q-S)process,i.e.,shear spinning after blank quenching,has been increasingly utilized to form 2219 aluminum alloy complex thin-walled ***,the changes in material property,shape and stress of the blanks after quenching will affect the spin-ning forming *** this study,the rules and mechanisms of these effects are investigated based on a combined finite element(FE)model including blank quenching and component spinning *** results indicate that the increase of material strength and the existence of distortion of the quenched blank lead to a notable increase in the non-uniformity of the circumferential compres-sive stress in the spinning area and the increase of the flange swing height during *** changes result in an increase in the wall thickness and component-mandrel gap of the *** quenching residual stress has little effect on wall thickness and roundness but can noticeably reduce the component-mandrel *** is because that the existence of quenching residual stress of the blank can lead to the decrease of the maximum circumferential compressive stress of the workpiece in spinning and an obvious drop in the maximum compressive stress after reaching the stress *** distortion is the main factor affecting the ***,the opti-mized installation way of the blank for spinning is obtained.

关键词： 2219 aluminum alloy Complex thin-walled com-ponents Finite element analysis Quenching distortion Residual stress Shear spinning

Optical remote sensing image characteristics of large amplitude convex mode-2 internal solitary waves:an experimental study

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Acta Oceanologica Sinica 2023年第6期42卷 16-23页

作者： zhixin li Meng Zhang Keda liang Jing Wang College of Physics and Optoelectronic Engineering Ocean University of ChinaQingdao 266100China

A series of experiments are designed to propose a new method to study the characteristics of convex mode-2internal solitary waves(ISWs)in optical remote sensing images using a laboratory-based optical remote sensing simulation *** corresponding wave parameters of large-amplitude convex mode-2 ISWs under smooth surfaces are investigated along with the optical remote sensing characteristic *** mode-2 ISWs in the experimentally obtained optical remote sensing image are produced by their overall modulation effect on the water surface,and the extreme points of the gray value of the profile curve of bright-dark stripes appear at the same location as the real optical remote sensing *** present data extend to a larger range than previous studies,and for the characteristics of large amplitude convex mode-2 ISWs,the experimental results show a second-order dependence of wavelength on *** is a close relationship between optical remote sensing characteristic parameters and wave parameters of mode-2 ISWs,in which there is a positive linear relationship between the bright-dark spacing and wavelength and a nonlinear relationship with the amplitude,especially when the amplitude is very large,there is a significant increase in bright-dark spacing.

关键词： mode-2 internal solitary waves optical remote sensing characteristic parameter wave characteristic