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Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan Wang Fan Zhang Xingyu Zhou Qian Wang changyu liu Yangyang liu Hui Wang Xiaojie liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

Abnormal Action Detection Based on Parameter-Efficient Transfer Learning in Laboratory Scenarios

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Computers, Materials & Continua 2024年第9期80卷 4219-4242页

作者： changyu liu Hao Huang Guogang Huang Chunyin Wu Yingqi Liang College of Mathematics and Informatics South China Agricultural UniversityGuangzhou510642China School of Oceanography Shanwei Institute of TechnologyShanwei516600China Technical Department Kerric(Guangdong)Laboratory Equipment Research and Manufacture Co.Ltd.Foshan528139China

Laboratory safety is a critical area of broad societal concern,particularly in the detection of abnormal *** enhance the efficiency and accuracy of detecting such actions,this paper introduces a novel method called TubeRAPT(Tubelet Transformer based onAdapter and Prefix TrainingModule).Thismethod primarily comprises three key components:the TubeR network,an adaptive clustering attention mechanism,and a prefix training *** components work in synergy to address the challenge of knowledge preservation in models pretrained on large datasets while maintaining training *** TubeR network serves as the backbone for spatio-temporal feature extraction,while the adaptive clustering attention mechanism refines the focus on relevant *** prefix training module facilitates efficient fine-tuning and knowledge *** results demonstrate the effectiveness of TubeRAPT,achieving a 68.44%mean Average Precision(mAP)on the CLA(Crazy LabActivity)small-scale dataset,marking a significant improvement of 1.53%over the previous TubeR *** research not only showcases the potential applications of TubeRAPT in the field of abnormal action detection but also offers innovative ideas and technical support for the future development of laboratory safety monitoring *** proposed method has implications for improving safety management systems in various laboratory environments,potentially reducing accidents and enhancing overall workplace safety.

关键词： Parameter-efficient transfer learning laboratory scenarios TubeRAPT abnormal action detection

DNEF:A New Ensemble Framework Based on Deep Network Structure

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Computers, Materials & Continua 2023年第12期77卷 4055-4072页

作者： Siyu Yang Ge Song Yuqiao Deng changyu liu Zhuoyu Ou College of Mathematics and Informatics South China Agricultural UniversityGuangzhou510642China School of Statistics and Mathematics Guangdong University of Finance and EconomicsGuangzhou510120China

Deep neural networks have achieved tremendous success in various fields,and the structure of these networks is a key factor in their *** this paper,we focus on the research of ensemble learning based on deep network structure and propose a new deep network ensemble framework(DNEF).Unlike other ensemble learning models,DNEF is an ensemble learning architecture of network structures,with serial iteration between the hidden layers,while base classifiers are trained in parallel within these hidden ***,DNEF uses randomly sampled data as input and implements serial iteration based on the weighting strategy between hidden *** the hidden layers,each node represents a base classifier,and multiple nodes generate training data for the next hidden layer according to the transfer *** DNEF operates based on two strategies:(1)The weighting strategy calculates the training instance weights of the nodes according to their weaknesses in the previous layer.(2)The transfer strategy adaptively selects each node’s instances with weights as transfer instances and transfer weights,which are combined with the training data of nodes as input for the next hidden *** two strategies improve the accuracy and generalization of *** research integrates the ensemble of all nodes as the final output of *** experimental results reveal that the DNEF framework surpasses the traditional ensemble models and functions with high accuracy and innovative deep ensemble methods.

关键词： Machine learning ensemble learning deep ensemble deep network structure classification

Enhancing Heat Transfer and Energy Storage Performance of Shell-and-Tube Latent Heat Thermal Energy Storage Unit with Unequal-Length Fins

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Journal of Thermal Science 2023年第6期32卷 2018-2031页

作者： WU Yangyang LI Dong YANG Ruitong MÜSLÜM Arıcı liu changyu School of Architecture and Civil Engineering Northeast Petroleum UniversityDaqing163318China Engineering Faculty Mechanical Engineering DepartmentKocaeli UniversityUmuttepe CampusKocaeliİzmit41001Turkey

Previous studies in literatures adequately emphasized that inserting fins into phase change material is among the most promising techniques to augment thermal performance of shell-and-tube latent heat thermal energy storage *** this study,the novel unequal-length fins are designed from the perspective of synergistic benefits of heat transfer and energy storage performance,and the effects of arrangement,number and total length of unequal-length fins are numerically *** show that utilization of fins with ascending length,when short and long fins are located in the inlet and outlet of heat transfer fluid respectively,can further promote the heat transfer and energy storage performance compared with equal length fins,and a maximum 6.17%and 0.43%increment of heat transfer performance and stored energy is achieved in full melting time,*** number of unequal-length fins plays a major role in the energy storage,and 18.95%and 0.91%improvement of heat transfer performance and stored energy is realized when equipped with 2 unequal-length fins.A 21.17%improvement of the heat transfer performance is obtained when the total length of unequal-length fins is 18 *** present study is helpful to make further efforts to enhance heat transfer and energy storage of shell-and-tube latent heat thermal energy storage unit with unequal-length fins.

关键词： unequal-length fin enhanced heat transfer energy storage shell and tube heat exchanger PCM

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Understanding of the sodium storage mechanism in hard carbon anodes

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Carbon Energy 2022年第6期4卷 1133-1150页

作者： Xiaoyang Chen changyu liu Yongjin Fang Xinping Ai Faping Zhong Hanxi Yang Yuliang Cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina Shenzhen National Engineering Research Center of Advanced Energy Storage Materials ShenzhenChina

Hard carbon has been regarded as the most promising anode material for sodiumion batteries(SIBs)due to its low cost,high reversible capacity,and low working ***,the uncertain sodium storage mechanism hinders the rational design and synthesis of high-performance hard carbon anode materials for practical *** the past decades,tremendous efforts have been put to stimulate the development of hard carbon *** this review,we discuss the recent progress of the study on the sodium storage mechanism of hard carbon anodes,and the effective strategies to improve their sodium storage performance have been *** is anticipated that hard carbon anodes with high electrochemical properties will be inspired and fabricated for large-scale energy storage applications.

关键词： anode electrochemical energy storage hard carbon sodium-ion batteries sodium storage mechanism

ABA-SAGA'S ACTIVITIES DURING THE REIGN OF ?ULGI IN THE UR Ⅲ DYNASTY

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Journal of Ancient Civilizations 2016年第1期31卷 1-6页

作者： changyu liu Institute of East China Sea Rim and Borderland Department of HistoryCollege of HumanitiesZhejiang Normal University

Aba-saga(Ab-ba-sa_6-ga) was a significant official in the Puzri?-Dagan organization during the Third Dynasty of Ur. Although his main administrative practices date to the reign of Amar-Suen, Aba-saga is also attested in texts dating to the reign of ?ulgi. As his father Nasa's auxiliary, Aba-saga played an important role in the Puzri?-Dagan organization during ?ulgi's second half of regnal years.

关键词：美国航天局 ABA 文字记载传奇行政伊拉克儿子

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BOOK REVIEWS

Journal of Ancient Civilizations 2013年第1期28卷 136-139页

作者： changyu liu Seminar für Sprachen und Kulturen des Vorderen Orients–Assyriologie Ruprecht-Karls-Universitat Heidelberg

Review article:OZAKI Tohru and SIGRIST *** in Jerusalem:Sainte-Anne and Saint-étienne.(Periodic Publications on Ancient Civilizations,No.4).Changchun:*** 1004-9371,CN 22–1213/K,Pp.164+70 plates,$50(hardcover).

关键词：书评耶路撒冷古代文明出版物

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Rural E-commerce and New Model of Rural Development in China:A Comparative Study of "Taobao Village" in Jiangsu Province

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Asian Agricultural Research 2015年第11期7卷 35-37,46页

作者： changyu liu Jiale LI Jing liu School of Economics and Management Nanjing Agricultural University

With the development of electronic commerce,there is a special phenomenon in rural areas of China that a lot of farmers in these areas depend on opening shops on Taobao online for a living. The products are made from the village workshop,and farmers become fullyfledged network businessmen. Electronic business platform mode of " Taobao Village" is the result of integrated development of primary,secondary and tertiary industries. In this study,we take two kinds of typical Taobao villages( Dongfeng Village and Yanxia Village) as sample areas,and conduct comparative analysis of this new rural business model based on field survey data,case studies and theoretical research. We also probe into the problems in the development of Taobao villages,and set forth the recommendations for the new rural business model.

关键词： Farmers E-commerce Taobao Village Rural development

A novel Na_(8)Fe_(5)(SO_(4))_(9)@rGO cathode material with high rate capability and ultra-long lifespan for low-cost sodium-ion batteries

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eScience 2024年第1期4卷 96-103页

作者： changyu liu Kean Chen Huiqian Xiong Along Zhao Haiyan Zhang Qingyu Li Xinping Ai Hanxi Yang Yongjin Fang Yuliang Cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072China Guangdong Engineering Laboratory of Energy Storage Materials and Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China

Sodium-ion batteries(SIBs)are regarded as the most promising technology for large-scale energy storage ***,the practical application of SIBs is still hindered by the lack of applicable cathode ***,a novel phase-pure polyanionic Na_(8)Fe_(5)(SO_(4))_(9) is designed and employed as a cathode material for SIBs for the first *** Na_(8)Fe_(5)(SO_(4))_(9) has an alluaudite-type sulfate framework and small Naþion diffusion *** expected,the as-synthesized Na_(8)Fe_(5)(SO_(4))_(9)@rGO exhibits a high working potential of 3.8 V(versus Na/Naþ),a superior reversible capacity of 100.2 mAh g1 at 0.2 C,excellent rate performance(~80 mAh g1 at 10 C,~63 mAh g1 at 50 C),and an ultra-long cycling life(91.9%capacity retention after 10,000 cycles at 10 C,81%capacity retention after 20,000 cycles at 50 C).We use various techniques and computational methods to comprehensively investigate the electrochemical reaction mechanisms of Na_(8)Fe_(5)(SO_(4))_(9)@rGO.

关键词： Na_(8)Fe_(5)(SO_(4))_(9) Phase-pure Density functional theory Cathode materials Sodium-ion batteries

Visualization of the protective role of estrogen against female liver fibrosis via an ER viscosity NIR fluorescent probe

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Science China Chemistry 2025年第1期68卷 360-368页

作者： Zheng liu changyu Zhang Zipeng Li Wanying Ma Jia liu Xiang Xia Ning Xu Wen Sun Jianjun Du Jiangli Fan Xiaojun Peng State Key Laboratory of Fine Chemicals Dalian University of Technology Ningbo Institute of Dalian University of Technology

Endoplasmic reticulum(ER) viscosity has emerged as a new potential biomarker for hepatic fibrosis(HF). Herein, we report the first ER-targeting viscosity-responsive near-infrared(NIR) fluorescent probe HBT-PP for investigations of HF *** twisted intramolecular charge transfer(TICT) and the excited state intramolecular proton transfer(ESIPT) are combined to endow HBT-PP with the selective response towards viscosity(～62-fold) and a super large stokes shift(～320 nm). HBT-PP mainly targets organelle ER and is able to image the drug-or alcohol-induced viscosity elevation in living cells. Significantly,HBT-PP was successfully applied to visualize the gender difference in HF and the protective role of estrogen in restraining HF progression. Of note, after 10 min of stain with HBT-PP, HF lesions showed a stage-based response, indicating the potential of this probe in fast and early diagnosis of HF. These results clearly demonstrated the promising application of HBT-PP as a new tool for exploring ER viscosity-involved physiological and pathological processes.

关键词： NIR fluorescent probe ER viscosity hepatic fibrosis gender difference estrogen