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Overdischarge-induced evolution of Cu dendrites and degradation of mechanical properties in lithium-ion batteries

Journal of Energy Chemistry 2023年第3期78卷 497-506,I0014页

作者： zixin guo Siguo Yang Wenyang Zhao Shenghui Wang Jiong Liu Zhichao Ma Hongwei Zhao Luquan Ren Key Laboratory of CNC Equipment Reliability Ministry of EducationJilin UniversityChangchun 130025JilinChina School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130015JilinChina Key Laboratory of Bionic Engineering Ministry of Education Jilin UniversityChangchun 130025JilinChina Weihai Institute for Bionics-Jilin University Weihai 264400ShandongChina

The degradation of mechanical properties of overdischarge battery materials manifests as a significant effect on the energy density,safety,and cycle life of the batteries.However,establishing the correlation between depth of overdischarge and mechanical properties is still a significant challenge.Studying the correlation between depth of overdischarge and mechanical properties is of great significance to improving the energy density and the ability to resist abuse of the batteries.In this paper,the mechanical properties of the battery materials during the whole process of overdischarge from discharge to complete failure were studied.The effects of depth of overdischarge on the elastic modulus and hardness of the cathode of the battery,the tensile strength and the thermal shrinkage rate of the separator,and the performance of binder were investigated.The precipitation of Cu dendrites on the separator and cathode after dissolution of anode copper foil is a key factor affecting the performance of battery materials.The Cu dendrites attached to the cathode penetrate the separator,causing irreversible damage to the coating and base film of the separator,which leads to a sharp decline in the tensile strength,thermal shrinkage rate and other properties of the separator.In addition,the Cu dendrites wrapping the cathode active particles reduce the adhesion of the active particles binder.Meanwhile,the active particles are damaged,resulting in a significant decrease in the elastic modulus and hardness of the cathode.

关键词： Overdischarge Cu dendrites Mechanical properties Nanoindentation Micron scratch

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Olive oil ameliorate allergic response in ovalbumin-induced food allergy mouse by promoting intestinal mucosal immunity

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Food Science and Human Wellness 2023年第3期12卷 801-808页

作者： Yu Ma Ming Liu Donghui Li Jie Li zixin guo Yunjun Liu Shengnan Wan Yixiang Liu College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China National Food and Strategic Reserves Administration Beijing 100083China Collaborative Innovation Center of Provincial and Ministerial Co-Construction for Marine Food Deep Processing Dalian Polytechnic UniversityDalian 116034China

The numerous health benefits of olive oil are widely known,however,it also provides anti-allergic properties that have not yet been fully defined.In this study,the anti-allergic activity of olive oil was evaluated by analyzing the clinical symptoms and immune-related factors in BALB/c mice that had ingested600 mg/(kg·day)olive oil for two weeks prior to the evaluation.An allergy model was subsequently constructed for analysis,the results of which showed that the olive oil reduced the scores of allergic symptoms in the mice,and up-regulated the hypothermia and the decline in the immune organ index.Moreover,fewer allergy-related cytokines and reduced intestinal inflammation was discovered in the olive oil-treated group.In addition,analysis of intestinal mucosal immune-related factors revealed that the olive oil promoted the expression of intestinal tight junction proteins(Claudin-1,Occludin,and ZO-1)and IL-22,and helped maintain the integrity of the intestinal epithelial physical barrier.Increased levels of mucin 2 andβ-defensin were also found in the intestinal mucus of the olive oil-treated mice.These findings suggest that the oral administration of olive oil effectively attenuated the ovalbumin-induced allergic immune response in the mice,and had a positive effect on intestinal epithelial mucosal immunity.

关键词： Olive oil Ovalbumin-induced food allergy Anti-food allergy Intestinal mucosal immunization

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Human activity recognition based on HMM by improved PSO and event probability sequence

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Journal of Systems Engineering and Electronics 2013年第3期24卷 545-554页

作者： Hanju Li Yang Yi Xiaoxing Li zixin guo Department of Computer Science Sun Yat-sen University Information Centre Dongguan Power Supply BureauGuangdong Power Grid Co Xinhua College Sun Yat-sen University

This paper proposes a hybrid approach for recognizing human activities from trajectories. First, an improved hidden Markov model （HMM） parameter learning algorithm, HMM-PSO, is proposed, which achieves a better balance between the global and local exploitation by the nonlinear update strategy and repulsion operation. Then, the event probability sequence （EPS） which consists of a series of events is computed to describe the unique characteristic of human activities. The anatysis on EPS indicates that it is robust to the changes in viewing direction and contributes to improving the recognition rate. Finally, the effectiveness of the proposed approach is evaluated by data experiments on current popular datasets.

关键词： human activity recognition hidden Markov model （HMM） event probability sequence （EPS） particle swarm optimization （PSO）.

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EdgeKeeper: a trusted edge computing framework for ubiquitous power Internet of Things

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Frontiers of Information Technology & Electronic Engineering 2021年第3期22卷 374-399页

作者： Weiyong YANG Wei LIU Xingshen WEI zixin guo Kangle YANG Hao HUANG Longyun QI Department of Computer Science and Technology Nanjing UniversityNanjing 210023China NARI Group Co. Ltd.Nanjing 210003China

Ubiquitous power Internet of Things(IoT)is a smart service system oriented to all aspects of the power system,and has the characteristics of universal interconnection,human-computer interaction,comprehensive state perception,efficient information processing,and other convenient and flexible applications.It has become a hot topic in the field of IoT.We summarize some existing research work on the IoT and edge computing framework.Because it is difficult to meet the requirements of ubiquitous power IoT for edge computing in terms of real time,security,reliability,and business function adaptation using the general edge computing framework software,we propose a trusted edge computing framework,named“EdgeKeeper,”adapting to the ubiquitous power IoT.Several key technologies such as security and trust,quality of service guarantee,application management,and cloud-edge collaboration are desired to meet the needs of the edge computing framework.Experiments comprehensively evaluate EdgeKeeper from the aspects of function,performance,and security.Comparison results show that EdgeKeeper is the most suitable edge computing framework for the electricity IoT.Finally,future directions for research are proposed.

关键词： Internet of Things Ubiquitous power Internet of Things Edge computing Trusted computing Network security

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基于GIS的国土空间规划编制信息管理系统设计与实现

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测绘与空间地理信息 2024年第1期47卷 142-144,151页

作者：郭子鑫西藏康桑地质工程有限公司西藏拉萨850000

规划编制是国土空间规划建设体系中的一项重要内容,传统规划编制模式和工具已无法满足信息化、精细化、智慧化的城市发展建设要求。文本利用GIS、云计算以及大数据等技术,结合规划编制管理需求,开发了国土空间规划编制信息管理系统,实... 详细信息

规划编制是国土空间规划建设体系中的一项重要内容,传统规划编制模式和工具已无法满足信息化、精细化、智慧化的城市发展建设要求。文本利用GIS、云计算以及大数据等技术,结合规划编制管理需求,开发了国土空间规划编制信息管理系统,实现了规划编制项目管理、行业管理、成果管理、“双评价”管理以及规划辅助设计管理等功能,有效地提高了规划编制信息化水平。

关键词： GIS 国土空间规划规划编制信息管理

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制度诱导对高新技术企业创新的影响——以珠三角制造业高新技术企业为例

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科技管理研究 2024年第7期44卷 1-9页

作者：窦子欣孙延明郭秀强广州大学管理学院广东广州510006 广州大学现代产业高质量发展研究中心广东广州510006 华南理工大学工商管理学院广东广州510641

首先探讨企业创新制度前因,判断选择性和普惠性制度诱导分别对企业实质性和策略性创新的影响情况。基于此,使用企业内部研发机构进行调节分析。最后,进行异质性检验、稳健性检验以及因果性检验。结果发现:(1)选择性制度更能诱导企业实... 详细信息

首先探讨企业创新制度前因,判断选择性和普惠性制度诱导分别对企业实质性和策略性创新的影响情况。基于此,使用企业内部研发机构进行调节分析。最后,进行异质性检验、稳健性检验以及因果性检验。结果发现:(1)选择性制度更能诱导企业实质性创新;普惠性制度则更能诱导企业策略性创新;(2)在企业内部研发机构调节下,制度诱导对企业实质性创新作用更显著;(3)上市高新技术企业和火炬重点高新技术企业更能凸显制度诱导作用效果。研究证实企业内部研究机构对制造业高新技术企业创新能力提升具有重要现实意义,政府应鼓励并扶持高新技术企业设立内部研发机构。

关键词：高新技术企业制度诱导研发机构企业创新

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稻米中蛋白体的分离纯化及表征

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中国粮油学报 2024年第2期39卷 54-62页

作者：许子鑫郭玉宝魏秦刘昕煜王馨雨安徽工程大学生物与食品工程学院芜湖241000

以糙米为原料,建立利用低浓度氢氧化钠从稻米胚乳中分离蛋白体的方法。以蛋白体体积分数为指标,得到蛋白体分离条件为:碱液浓度14 mmol/L、液料比12 mL/g、搅拌时间90 min、超声功率90 W、超声温度35℃和超声时间40 min,蛋白体体积分数... 详细信息

以糙米为原料,建立利用低浓度氢氧化钠从稻米胚乳中分离蛋白体的方法。以蛋白体体积分数为指标,得到蛋白体分离条件为:碱液浓度14 mmol/L、液料比12 mL/g、搅拌时间90 min、超声功率90 W、超声温度35℃和超声时间40 min,蛋白体体积分数达20.10%。再经0.1、5.0μm滤膜过滤及4.0 mol/L氯化钙去除残余淀粉,获得纯化的蛋白体。所得蛋白体呈微球形,有荧光;具有16、22、33、57 ku的蛋白亚基;X-衍射19.9°处显示β-折叠峰;红外1464、1534 cm^(-1)属于AmideⅡ带;拉曼1303、1651 cm^(-1)属于AmideⅢ和AmideⅠ带,均为蛋白质的特征吸收。因此,以低浓度氢氧化钠分离并经微孔滤膜和氯化钙纯化从稻米中获取蛋白体是可行的,这为研究稻米胚乳中蛋白体的结构和性质提供了方法学参考。

关键词：稻米蛋白体分离纯化形态结构鉴定

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Olive oil ameliorate allergic response in OVA-induced food allergy mouse by promoting intestinal mucosal immunity

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Food Science and Human Wellness 2022年

作者： Yu Ma Ming Liu Donghui Li Jie Li zixin guo Yunjun Liu Shengnan Wan Yixiang Liu Collaborative Innovation Center of Provincial and Ministerial Co-construction for Marine Food Deep Processing， Dalian Polytechnic University College of Ocean Food and Biological Engineering， Jimei University National Food and Strategic Reserves Administration

The numerous health benefits of olive oil are widely known， however， it also provides anti-allergic properties that have not yet been fully defined. In this study， the anti-allergic activity of olive oil was evaluated by analyzing the clinical symptoms and immune-related factors in BALB/c mice that had ingested 600 mg/(kg·d) olive oil for two weeks prior to the evaluation. An allergy model was subsequently constructed for analysis， the results of which showed that the olive oil reduced the scores of allergic symptoms in the mice， and up-regulated the hypothermia and the decline in the immune organ index. Moreover， fewer allergy-related cytokines and reduced intestinal inflammation was discovered in the olive oil-treated group. In addition， analysis of intestinal mucosal immune-related factors revealed that the olive oil promoted the expression of intestinal tight junction proteins (Claudin-1， Occludin， and ZO-1) and IL-22， and helped maintain the integrity of the intestinal epithelial physical barrier. Increased levels of mucin 2 and β-defensin were also found in the intestinal mucus of the olive oil-treated mice. These findings suggest that the oral administration of olive oil effectively attenuated the OVA-induced allergic immune response in the mice， and had a positive effect on intestinal epithelial mucosal immunity.

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基于自然资源全要素分类的调查监测本底数据处理方法

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测绘通报 2024年第S1期 29-34页

作者：孙常建李蕊娟印青金子鑫郭秀丽河南省地理信息院河南郑州450003 吉奥时空信息技术股份有限公司湖北武汉430223

统一自然资源分类标准是自然资源有效管理的基础,夯实调查监测本底数据是支撑自然资源调查监测、分析评价的有力保障。本文通过比较、分析现行自然资源分类标准的特点及存在问题,结合地方实际需求,提出了一种自然资源全要素分类标准,阐... 详细信息

统一自然资源分类标准是自然资源有效管理的基础,夯实调查监测本底数据是支撑自然资源调查监测、分析评价的有力保障。本文通过比较、分析现行自然资源分类标准的特点及存在问题,结合地方实际需求,提出了一种自然资源全要素分类标准,阐述了基于统一分类标准的调查监测数据融合处理方案,并选取试点区域进行了数据验证,以期为河南省自然资源调查监测工作提供可行思路。

关键词：自然资源全要素分类标准调查监测

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航空铝合金薄板自冲铆接头静力学性能的研究

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热加工工艺 2024年第9期53卷 39-44页

作者：郭子鑫赵伦郭媛媛霍小乐林森王红英辽宁科技大学材料与冶金学院辽宁鞍山114051 深圳职业技术学院智能制造技术研究院广东深圳518055

自冲铆是近年兴起的一种性能优异、绿色和高效的连接新技术,可连接同种、异种和多层板材,有望成为航空轻合金薄板材料连接的关键技术。本文以2A12(A组)和6061(B组)异质自冲铆接头为研究对象,进行静力学性能测试及失效微观分析,对接头成... 详细信息

自冲铆是近年兴起的一种性能优异、绿色和高效的连接新技术,可连接同种、异种和多层板材,有望成为航空轻合金薄板材料连接的关键技术。本文以2A12(A组)和6061(B组)异质自冲铆接头为研究对象,进行静力学性能测试及失效微观分析,对接头成形质量、力学性能、失效形式及失效机理进行系统分析。结果表明:SBA(6061-2A12)接头成形质量最佳,SBB(6061-6061)接头密封性能最好,SAA(2A12-2A12)接头对称性最优;SAA接头具有最强静载强度,SBB接头具有最优抗震吸收能力,SBA和SAB(2A12-6061)接头的综合力学性能较好。SBB接头失效形式均为拉脱失效;SAA接头失效形式最不稳定,出现了3种不同失效形式;接头最主要的失效形式是拉脱失效。

关键词： 2A12铝合金 6061铝合金自冲铆接力学性能能量吸收

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