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Thermal characteristic evolution of lithium-ion batteries during the whole lifecycle

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Journal of Energy Chemistry 2024年第5期92卷 534-547页

作者： Guangxu Zhang Xuezhe Wei donghai chen Xueyuan Wang Siqi chen Jiangong Zhu Haifeng Dai School of Materials Science and Engineering Tongji UniversityShanghai 201804China Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China School of Automotive Studies Tongji UniversityShanghai 201804China

This work extensively investigates the thermal characteristic evolution of lithium-ion batteries under different degradation paths,and the evolution mechanism through multi-angle characterization is *** different degradation paths,the evolution trend of temperature rise rate remains unchanged with respect to depth of discharge during the adiabatic discharge process,albeit to varying degrees of *** temperature rise rate changes significantly with aging during the adiabatic discharge process under low-temperature cycling and high-rate cycling *** total heat generation rate,irreversible heat generation rate,and reversible heat generation rate exhibit similar evolution behavior with aging under different degradation *** interval range of endothermic process of reversible electrochemical reactions increases and the contribution of irreversible heat to the total heat increases with *** further standardize the assessment of different degradation paths on the thermal characteristics,this work introduces the innovative concept of“Ampere-hour temperature rise”.In low-temperature cycling and high-rate cycling paths,the ampere-hour temperature rise increases significantly with aging,particularly accentuated with higher discharge ***,in high-temperature cycling and high-temperature storage paths,the ampere-hour temperature rise remains relatively stable during the initial stages of aging,yet undergoes a notable increase in the later stages of *** multi-angle characterization reveals distinct thermal evolution behavior under different degradation paths primarily attributed to different behavior changes of severe side reactions,such as lithium *** findings provide crucial insights for the safe utilization and management of lithium–ion batteries throughout the whole lifecycle.

关键词： Lithium-ion batteries Adiabatic discharge Thermal characteristics Ampere-hour temperaturerise Degradation

Interior-Point Algorithm for Linear Optimization Based on a New Kernel Function

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Wuhan University Journal of Natural Sciences 2012年第1期17卷 12-18页

作者： chen donghai ZHANG Mingwang LI Weihua College of Science China Three Gorges UniversityYichang 443002HubeiChina

In this paper, we design a primal-dual interior-point algorithm for linear optimization. Search directions and proximity function are proposed based on a new kernel function which includes neither growth term nor barrier term. Iteration bounds both for large-and small-update methods are derived, namely, O（nlog（n/c）） and O（√nlog（n/ε））. This new kernel function has simple algebraic expression and the proximity function has not been used before. Analogous to the classical logarithmic kernel function, our complexity analysis is easier than the other pri- mal-dual interior-point methods based on logarithmic barrier functions and recent kernel functions.

关键词： linear optimization interior-point algorithms pri- mal-dual methods kernel function polynomial complexity

An Efficient Load Balancing Approach for N-Hierarchical Web Server Cluster

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Wuhan University Journal of Natural Sciences 2015年第6期20卷 537-542页

作者： PAK Ilchol QIAO Baiyou SHEN Muchuan ZHU Junhai chen donghai College of Information Science and Engineering Northeastern University College of Information Science and Technology Kim Chaek University of Technology

Aiming at the load imbalance and poor scalability in single-tier Web server clusters, an efficient load balancing ap- proach is proposed for constructing an N-hierarchical （multi-tier） Web server cluster. In each layer, multiple load balancers are set to receive the user requests simultaneously, and different load bal- ancing algorithms are used to construct the high-scalable Web cluster system. At the same time, an improved load balancing al- gorithm is proposed, which can dynamically calculate weights according to the utilization of the server resources, and reasonably distribute the loads for each server according to the load status of the servers. The experimental results show that the proposed ap- proach can greatly decrease the load imbalance among the Web servers and reduce the response time of the entire Web cluster system.

关键词： Web server cluster load balancing algorithm scalability availability

Vacuum ammonia stripping from liquid digestate:Effects of pH,alkalinity,temperature,negative pressure and process optimization

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Journal of Environmental Sciences 2025年第3期149卷 638-650页

作者： Qiuhong chen donghai Yang Xiang chen Xiankai Wang Bin Dong Xiaohu Dai State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China YANGTZE Eco-Environment Engineering Research Center National Engineering Research Center of Eco-environment Protection for Yangtze River Economic BeltChina Three Gorges CorporationWuhan 430010China

High ammonia-nitrogen digestate has become a key bottleneck limiting the anaerobic digestion of organic solid *** ammonia stripping can simultaneously remove and recover ammonia nitrogen,which has attracted a lot of attention in recent *** investigate the parameter effects on the efficiency and mass transfer,five combination conditions(53℃ 15 kPa,60°C 20 kPa,65°C 25 kPa,72°C 35 kPa,and 81°C 50 kPa)were conducted for ammonia stripping of sludge *** results showed that 80%of ammonia nitrogen was stripped in 45 min for all experimental groups,but the ammonia transfer coefficient varied under different conditions,which increased with the rising of boiling point temperature,and reached the maximum value(39.0 mm/hr)at 81°C 50 *** ammonia nitrogen removal efficiency was more than 80%for 30 min vacuum stripping after adjusting the initial pH to above 9.5,and adjustment of the initial alkalinity also affects the pH value of liquid *** was found that pH and alkalinity are the key factors influencing the ammonia nitrogen dissociation and removal efficiency,while temperature and vacuum mainly affect the ammonia nitrogen mass transfer and removal *** terms of the mechanism of vacuum ammonia stripping,it underwent alkalinity destruction,pH enhancement,ammonia nitrogen dissociation,and free ammonia *** this study,two-stage experiments of alkalinity destruction and ammonia removal were also carried out,which showed that the two-stage configuration was beneficial for ammonia *** provides a theoretical basis and practical technology for the vacuum ammonia stripping from liquid digestate of organic solid waste.

关键词： Liquid digestate Vacuum ammonia stripping Alkalinity Mass transfer Process optimization

Small RNA existed in commercial reverse transcriptase： primary evidence of functional small RNAs

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Protein & Cell 2015年第1期6卷 1-5页

作者： Jie Xu Xi chen donghai Li Qun chen Zhen Zhou Dongxia Hou Jin Wang Qipeng Zhang Ke Zen chen-Yu Zhang Jiangsu Engineering Research Center for microRNA Biology and Biotechnology State Key Laboratory of Pharmaceutical Biotechnology School of Life Sciences Nanjing University Nanjing 210093 China

SMALL RNA IN REVERSE TRANSCRIPTASE： TOO SMALL TO BE FOUND Significant background in no-template or no-primer RT-PCR is frequently noted. However, the underlying mechanism is still unclear. In this issue, Jie Xu and colleagues reveal that the com- mercial reverse transcriptases contain small RNAs. In AMV reverse transcriptase, they detected microRNAs derived from the virus host chick or other birds. This surprising finding at least partially explains the high background in some AMV reverse transcriptases based RT-PCR.

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椭圆振动修整超声磨削ZrO_2温度试验研究

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振动．测试与诊断 2009年第2期29卷 234-236页

作者：陈东海刘春孝河南理工大学机械与动力工程学院焦作454003 焦作大学远程教育学院焦作454000

采用椭圆超声振动辅助金刚石笔修整方法修整金属结合剂金刚石砂轮,考察声学系统参数及磨削参数对超声振动辅助磨削纳米氧化锆陶瓷过程中磨削温度的影响。试验结果表明,椭圆超声振动辅助修整的金刚石砂轮超声振动磨削中,磨削温度相对较... 详细信息

采用椭圆超声振动辅助金刚石笔修整方法修整金属结合剂金刚石砂轮,考察声学系统参数及磨削参数对超声振动辅助磨削纳米氧化锆陶瓷过程中磨削温度的影响。试验结果表明,椭圆超声振动辅助修整的金刚石砂轮超声振动磨削中,磨削温度相对较低。相比其他修整参数,修整深度对磨削温度的影响较小。磨削参数中,磨削深度对磨削温度影响因子较大,砂轮速度影响较弱。此外,磨粒在切削过程中做超声振动,改变了切削条件及散热条件,弱化了砂轮表面地貌对磨削温度的影响,因此,不同修整方式的金刚石砂轮的磨削温度差别不大,两种修整方式下磨削温度下降的梯度大致相当。

关键词：椭圆振动超声修整金刚石砂轮磨削温度

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基于簇头功能分化的无线传感器网络成簇算法

传感技术学报 2015年第2期28卷 244-248页

作者：陈东海李长庚中南大学物理与电子学院长沙410083

以LEACH为基础演化而来的各类算法在簇头选举时始终包含有＂随机选择＂的成分,导致无线传感器网络在拓扑结构的优化和能量消耗的均衡上受到限制。从分化簇头功能和优化功能节点选举机制的角度出发,提出一种分化簇头功能的分布式算法,引... 详细信息

以LEACH为基础演化而来的各类算法在簇头选举时始终包含有＂随机选择＂的成分,导致无线传感器网络在拓扑结构的优化和能量消耗的均衡上受到限制。从分化簇头功能和优化功能节点选举机制的角度出发,提出一种分化簇头功能的分布式算法,引入功能节点推荐机制,弱化簇头选举中的随机成分,分化簇头功能,将以往簇头管理节点、融合数据、转发信息的三大功能分别由管理节点、融合节点、转发节点3个功能节点来承担。仿真数据表明,提出的分簇算法能有效优化簇内拓扑结构、提高节点能量消耗均衡性,能够延长网络生存周期15%~20%。

关键词：无线传感器网络功能分化管理节点融合节点转发节点

Collnearity and similar expression pattern of rice DREB1s reveal their functional conservation in the cold-responsive pathway

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Collnearity and similar expression pattern of rice DREB1s re...

水平线性互补问题的广义中心路径跟踪算法(英文)

第十三届全国植物基因组学大会

作者： donghai Mao,Caiyan chen~* Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China

The clustered genes C-repeat(CRT) binding factor(CBF)1/dehydration-responsive element binding protein DREB1B,CBF2/DREB1C,and CBF3/DREB1A play a central role in cold acclimation and facilitate plant resistance to freezing in Arabidopsis ***(Oryza sativa L.) is very sensitive to low temperature;enhancing the cold stress tolerance of rice is a key challenge to increasing its *** this study,we

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应用数学 2011年第2期24卷 304-311页

作者：陈东海张明望三峡大学理学院湖北宜昌443002

对水平线性互补问题提出了一种广义中心路径跟踪算法.任意的原始-对偶可行内点均可作为算法的初始点.每步迭代选择"仿射步"与"中心步"的凸组合为新的迭代方向,采用使对偶间隙尽可能减小的最大步长.算法的迭代复杂性为O(nL).

关键词：水平线性互补问题内点方法广义中心路径跟踪算法多项式复杂性