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3D nitrogen and boron dual-doped carbon quantum dots/reduced graphene oxide aerogel for advanced aqueous and flexible quasi-solid-state zinc-ion hybrid capacitors

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Rare Metals 2023年第7期42卷 2307-2323页

作者： Jun-Jun Yao Chang liu Jing-Ying li Zhong-liang Hu ru-Yi Zhou chen-chen Guo Xin-ru liu Fei-Fan Yang Yi-Rong Zhu Hunan Key Laboratory of Green Metallurgy and New Energy Materials College of Materials and Advanced ManufacturingHunan University of TechnologyZhuzhou412007China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan411104China National&Local Joint Engineering Research Center for Advanced Packaging Material and Technology Hunan University of TechnologyZhuzhou412007China

As prospective energy storage devices,zinc-ion hybrid capacitors(ZHCs)still suffer from unsatisfactory cathode ***,the three dimensional(3D)N,B dual-doped carbon quantum dots/reduced graphene oxide(N,B-CQDs/rGO)composite aerogel is prepared via a onepot hydrothermal *** to the synergism of CQDs modification and N,B dual-doping,the resultant N,B-CQDs/rGO composite aerogel delivers superior electrochemical ***,the as-obtained N,B-CQDs/rGO composite aerogel is served as a cathode for aqueous and flexible quasi-solid-state ZHCs for the first ***,the aqueous N,B-CQDs/rGO//Zn ZHC manifests a large energy density of 96.2 Wh·kg^(-1)at80 W·kg^(-1)and still remains a high energy density of 54.7Wh·kg^(-1)at a superb power density of 80 kW·kg^(-1).Meanwhile,kinetic analyses are employed to elucidate the prominent power performance,and various ex situ tests are undertaken to explore the energy storage mechanism of aqueous *** notably,the flexible quasi-solid-state N,B-CQDs/rGO//Zn ZHC displays a desirable energy density(89.1μWh·cm^(-2)),a superior power density(96,000μW·cm^(-2))and exceptional flexible *** present study offers a valuable reference for designing and developing advanced cathode materials for aqueous and flexible quasi-solid-state ZHCs.

关键词： Carbon quantum dots(CQDs) Graphene aerogel Heteroatom dual-doping Energy storage mechanism Zinc-ion hybrid capacitors(ZHCs)

TWO-SCALE FEM FOR ELliPTIC MIXED BOUNDARY VALUE PROBLEMS WITH SMALL PERIODIC COEFFICIENTS

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Journal of Computational Mathematics 2001年第5期19卷 549-560页

作者： Jin-ru chen Jun-zhi Cui School of Mathematics and Computer Sciences Nanjing Normal UniversityNanjing 210097China ICMSEC Academy of Mathematics and Systems SciencesChinese Academy of SciencesBeijing 100080China

Presents a study which proposed a dual approximate expression of the exact solution for mixed boundary value problems of second order elliptic partial differential equation with small periodic coefficients. Dual appro... 详细信息

关键词： two-scale FEM mixed boundary value small periodic coefficients

CT local reconstruction of solid rocket motor based on PI-POCS-TVM

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航空动力学报 2017年第2期32卷 470-476页

作者： LU Hong-yi chen Qing-gui ZHU Min li Peng ZHAO ru-yan WANG Bin Airborne Vehicle Engineering Department Naval Aeronautical and Astronautical University Yantai Shandong 264001 China Qingdao Branch Naval Aeronautical and Astronautical University Qingdao Shandong 266041 China No. 7 Department Naval Aeronautical and Astronautical University Yantai Shanctong 264001 China

In order to test the defects of solid rocket motor(SRM)accurately and efficiently,the computed tomography(CT)inspection scheme for SRM's defects was investigated and a CT local reconstruction algorithm called prior information-projection onto convex sets-total variation minimization(PI-POCS-TVM)was *** SRM was first inspected by industrial CT(ICT)to generate a low-resolution SRM image used as the prior information,then high-resolution local inspection was carried out for SRM's *** validate the effectiveness of the CT inspection scheme for SRM's defects,one SRM was inspected by a narrow fan beam ICT *** back projection(FBP)algorithm,POCS,POCS-TVM and PI-POCS-TVM algorithms were applied to reconstruct CT *** performance of these algorithms was also *** demonstrated the effectiveness of the CT inspection scheme for SRM's ***,the PI-POCS-TVM algorithm has better local reconstruction image quality than the other three algorithms,showing great significance for accurate measurement of SRM's defects.

关键词： interior tomography exterior tomography compressed sensing prior information projection onto convex sets-total variation minimization(POCS-TVM) solid rocket motor

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基于多切线技术的盾构隧道开挖面稳定性分析

岩土工程学报 2025年第1期47卷 76-84页

作者：钟军豪 CHIAN Siau chen 李永鑫刘明芳陈明辉吴振元龙桂华杨小礼周德中南大学土木工程学院湖南长沙410075 新加坡国立大学土木与环境工程系新加坡117576 合肥工业大学汽车与交通工程学院安徽合肥230009 深圳市市政工程总公司广东深圳518000

针对非线性条件下深埋隧道开挖面稳定性问题,采用多切线技术分段线性近似Power-Law(P-L)准则,基于极限分析上限定理,构建1种新的开挖面多曲线圆锥破坏机构,提出1种考虑拉应力截断Tensioncut-off(T-C)效应的开挖面稳定性理论计算方法。... 详细信息

针对非线性条件下深埋隧道开挖面稳定性问题,采用多切线技术分段线性近似Power-Law(P-L)准则,基于极限分析上限定理,构建1种新的开挖面多曲线圆锥破坏机构,提出1种考虑拉应力截断Tensioncut-off(T-C)效应的开挖面稳定性理论计算方法。通过与既有文献结果对比,验证所提方法的可靠性。根据反算的应力分布和破坏机构几何特点,探究不同参数条件下T-C对开挖面稳定性的影响。结果表明:(1)在线性条件下,黏聚力较大且内摩擦角较小时,T-C对开挖面临界支护力的影响较大;在非线性条件下,m的增加并不会放大T-C对开挖面稳定性的影响。(2)在抗拉强度较大时,T-C对开挖面稳定性影响较为显著,随着抗拉强度的折减,T-C控制的破坏机构尺寸逐渐减小,且顶部区域明显钝化。

关键词：开挖面稳定性多切线技术 Power-Law准则拉应力截断极限分析

2D Q-compensated multi-component elastic Gaussian beam migration

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Petroleum Science 2023年第1期20卷 230-240页

作者： Chao chen Ji-Dong Yang Xin-ru Mu Zhen-Chun li Jian-Ping Huang China University of Petroleum(East China) Qingdao266580ShandongChina

Elastic waves are affected by viscoelasticity during the propagation through the Earth,resulting in energy attenuation and phase distortion,in turn resulting in low seismic imaging ***,viscoelasticity should be considered in seismic migration *** propose a Q compensated multicomponent elastic Gaussian beam migration(Q-EGBM)method to(1)separate the elastic-wave data into longitudinal(P)and transverse(S)waves to perform PP-wave and PS-wave imaging;(2)recover the amplitude loss caused by attenuation;(3)correct phase distortions caused by dispersion;(4)improve the resolution of migration *** this paper,to accomplish(2),(3),and(4),we derive complex-valued traveltimes in viscoelastic *** results of numerical experiments using a simple five-layer model and a sophisticated BP gas model show that the method presented here has significant advantages in recovering energy decay and correcting phase distortion,as well as significantly improving imaging resolution.

关键词： Q-compensated Viscoelastic Gaussian beam migration Multi-component Absorption attenuation

Optimizations for High Performance Network Virtualization

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Journal of Computer Science & Technology 2016年第1期31卷 107-116页

作者： Fan-Fu Zhou ru-Hui Ma Jian li li-Xia chen Wei-Dong Qiu Hai-Bing Guan Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiao Tong University Shanghai 200240 China

The increasing requirements of intensive interoperaterbility among the distributed nodes desiderate the high performance network connections, owing to the substantial growth of cloud computing and datacenters. Network I/O virtualization aggregates the network resource and separates it into manageable parts for particular servers or devices, which provides effective consolidation and elastic management with high agility, flexibility and scalability as well as reduced cost and cabling. However, both network I/O virtualization aggregation and the increasing network speed incur higher traffic density, which generates a heavy system stress for I/O data moving and I/O event processing. Consequently, many researchers have dedicated to enhancing the system performance and alleviating the system overhead for high performance networking virtualizatiou. This paper first elaborates the mainstreaming I/O virtualization methodologies, including device emulation, split-driver model and hardware assisted model. Then, the paper discusses and compares their specific advantages in addition to performance bottlenecks in practical utilities. This paper mainly focuses on the comprehensive survey of state- of-the-art approaches for performance optimizations and improvements as well as the portability management for network I/O virtualization. The approaches include various novel data delivery schemes, overhead mitigations for interrupt processing and adequate resource allocations for dynamic network states. Finally, we highlight the diversity of I/O virtualization besides the performance improvements in network virtualization infrastructure.

关键词： network virtualization single root I/O virtualization (SR-IOV) virtual machine monitor (VMM)

A novel intelligent adaptive control of laser-based ground thermal test

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Chinese Journal of Aeronautics 2016年第4期29卷 1018-1026页

作者： Gan Zhengtao Yu Gang li Shaoxia He Xiuli chen ru Zheng Caiyun Ning Weijian Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences

Laser heating technology is a type of potential and attractive space heat flux simulation technology, which is characterized by high heating rate, controlled spatial intensity distribution and rapid response. However, the controlled plant is nonlinear, time-varying and uncertainty when implementing the laser-based heat flux simulation. In this paper, a novel intelligent adaptive controller based on proportion-integration-differentiation (PID) type fuzzy logic is proposed to improve the performance of laser-based ground thermal test. The temperature range of thermal cycles is more than 200 K in many instances. In order to improve the adaptability of controller, output scaling factors are real time adjusted while the thermal test is underway. The initial values of scaling factors are optimized using a stochastic hybrid particle swarm optimization (H-PSO) algorithm. A validating system has been established in the laboratory. The performance of the proposed controller is evaluated through extensive experiments under different operating conditions (reference and load disturbance). The results show that the proposed adaptive controller performs remarkably better compared to the conventional PID (PID) controller and the conventional PID type fuzzy (F-PID) controller considering performance indicators of overshoot, settling time and steady state error for laser-based ground thermal test. It is a reliable tool for effective temperature control of laser-based ground thermal test. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

关键词： Adaptive control Fuzzy logic Ground thermal test Laser heating Thermal control

SWRR:The link Scheduling Algorithm Based on Weighted Round-Robin

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Computers, Materials & Continua 2019年第6期59卷 965-982页

作者： Tianbo Lu ru Yan Chao li lihua Yin Hao chen Xieyu Zou School of Software Engineering Beijing University of Posts and TelecommunicationsBeijing100876China Key Laboratory of Trustworthy Distributed Computing and Service(Beijing University of Posts and Telecommunications) Ministry of EducationBeijing100876China Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou510006China Department Computer Science and Engineering The University of Texas at ArlingtonArlington76091USA

With the rapid development of the Internet,people pay more and more attention to the protection of *** second-generation onion routing system Tor is the most commonly used among anonymous communication systems,which can be used to protect user privacy *** recent years,Tor’s congestion problem has become the focus of attention,and it can affect Tor’s performance even user ***,we investigate the causes of Tor network congestion and summarize some link scheduling algorithms proposed in recent *** we propose the link scheduling algorithm SWRR based on WRR(Weighted Round Robin).In this process,we design multiple weight functions and compare the performance of these weight functions under different congestion conditions,and the appropriate weight function is selected to be used in our algorithms based on the experiment ***,we also compare the performance of SWRR with other link scheduling algorithms under different congestion conditions by experiments,and verify the effectiveness of the algorithm SWRR.

关键词： Weighted Round-Robin Tor congestion control link scheduling anonymous communication

Iron homeostasis and ferroptosis in human diseases: mechanisms and therapeutic prospects

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SIGNAL TRANSDUCTION AND TARGETED THERAPY 2024年第1期9卷 271页

作者： ru, Qin li, Yusheng chen, lin Wu, Yuxiang Min, Junxia Wang, Fudi Jianghan Univ Inst Intelligent Sport & Proact Hlth Dept Hlth & Phys Educ Wuhan Peoples R China Cent South Univ Xiangya Hosp Dept Orthoped Changsha Peoples R China Cent South Univ Xiangya Hosp Natl Clin Res Ctr Geriatr Disorders Changsha Peoples R China Zhejiang Univ Affiliated Hosp 1 Sch Med Hangzhou Peoples R China Zhejiang Univ Affiliated Hosp 2 Sch Publ Hlth Sch MedState Key Lab Expt Hematol Hangzhou Peoples R China

Iron, an essential mineral in the body, is involved in numerous physiological processes, making the maintenance of iron homeostasis crucial for overall health. Both iron overload and deficiency can cause various disorders and human diseases. Ferroptosis, a form of cell death dependent on iron, is characterized by the extensive peroxidation of lipids. Unlike other kinds of classical unprogrammed cell death, ferroptosis is primarily linked to disruptions in iron metabolism, lipid peroxidation, and antioxidant system imbalance. Ferroptosis is regulated through transcription, translation, and post-translational modifications, which affect cellular sensitivity to ferroptosis. Over the past decade or so, numerous diseases have been linked to ferroptosis as part of their etiology, including cancers, metabolic disorders, autoimmune diseases, central nervous system diseases, cardiovascular diseases, and musculoskeletal diseases. Ferroptosis-related proteins have become attractive targets for many major human diseases that are currently incurable, and some ferroptosis regulators have shown therapeutic effects in clinical trials although further validation of their clinical potential is needed. Therefore, in-depth analysis of ferroptosis and its potential molecular mechanisms in human diseases may offer additional strategies for clinical prevention and treatment. In this review, we discuss the physiological significance of iron homeostasis in the body, the potential contribution of ferroptosis to the etiology and development of human diseases, along with the evidence supporting targeting ferroptosis as a therapeutic approach. Importantly, we evaluate recent potential therapeutic targets and promising interventions, providing guidance for future targeted treatment therapies against human diseases.

关键词： diseases homeostasis therapeutic