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The safety aspect of sodium ion batteries for practical applications

Journal of Energy Chemistry 2024年第8期95卷 407-427页

作者： Yingshuai Wang Runqing Ou jingjing yang Yuhang Xin Preetam Singh Feng Wu Yumin Qian Hongcai Gao School of Materials Science & Engineering Beijing Institute of Technology Department of Ceramic Engineering Indian Institute of Technology(Banaras Hindu University) Varanasi School of Physics Beijing Institute of Technology yangtze Delta Region Academy of Beijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center

Sodium-ion batteries(SIBs) with advantages of abundant resource and low cost have emerged as promising candidates for the next-generation energy storage systems. However, safety issues existing in electrolytes, anodes, and cathodes bring about frequent accidents regarding battery fires and explosions and impede the development of high-performance SIBs. Therefore, safety analysis and high-safety battery design have become prerequisites for the development of advanced energy storage systems. The reported reviews that only focus on a specific issue are difficult to provide overall guidance for building high-safety SIBs. To overcome the limitation, this review summarizes the recent research progress from the perspective of key components of SIBs for the first time and evaluates the characteristics of various improvement strategies. By orderly analyzing the root causes of safety problems associated with different components in SIBs(including electrolytes, anodes, and cathodes), corresponding improvement strategies for each component were discussed systematically. In addition, some noteworthy points and perspectives including the chain reaction between security issues and the selection of improvement strategies tailored to different needs have also been proposed. In brief, this review is designed to deepen our understanding of the SIBs safety issues and provide guidance and assistance for designing high-safety SIBs.

关键词： Anode bulk modification Cathode bulk design Organic electrolytes modification Safety Sodium ion batteries Solid-state electrolyte

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A method for detecting two-dimensional plane stress distribution in basin-type insulator based on critically refracted longitudinal wave

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High Voltage 2024年第1期9卷 105-116页

作者： Zhaoyang Kang Fuqiang Ren Hongru Zhang jingjing yang Kaining Hou Qingquan Li Dongxin He Hongshun Liu Yongzhi Zhao Huaxin Wen Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment School of Electrical EngineeringShandong UniversityJinanChina Shandong Electrical Engineering&Equipment Group Co.Ltd JinanChina SDEE Hitachi High-voltage Switchgear Co. LtdJinanChina

Basin-type insulator often has small cracks due to stress concentration.The current method cannot accurately reflect the stress condition of the insulator to find the stress concentration areas.To solve these problems,a method for detecting two-dimensional plane stress(δ_(1) andδ_(2))within different depth ranges in a basin-type insulator is proposed based on critically refracted longitudinal(LCR)wave.First,the acoustoelastic equation characterising the relationship between the variation of LCR wave propagation time and the plane stress was derived.Next,the propagation characteristics of LCR wave in epoxy resin samples were investigated.Then,the stress distribution within different depth ranges of the insulator subjected to hydraulic load was measured using the proposed method,including direction(θ),δ_(1) andδ_(2).The results show that the magnitude of the stress alone cannot accurately characterise the stress state.Points with equal distances to the centre have similar stress magnitudes,but their directions are not the same.With increasing depth,θremains essentially unchanged at the same location,whileδ1 andδ2 decrease,and the rate of decrease varies at different locations.Comparing the measured and simulated data,the results showed that they were in good agreement,and the maximum errors of stress value andθwere 0.69 MPa and 2.97°,respectively,which confirmed the feasibility and accuracy of the stress detection in the proposed method.

关键词： stress insulator wave

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User friendly preferential private recommendation

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The Journal of China Universities of Posts and Telecommunications 2022年第3期29卷 43-53页

作者： yang jingjing Guo Yuchun Feng Tingting Chen Yishuai School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China China Unicom Network Technology Research Institute Beijing 100044China

To provide preferential protection for users while keeping good service utility, a preferential private recommendation framework(named as PrefER) is proposed. In this framework, a preferential budget allocation scheme is designed and implemented at the system side to provide multilevel protection.And users’ preference is utilized at the user side to improve recommendation performance without increasing users’ burden. This framework is generic enough to be employed with other schemes. Recommendation accuracy based on the MovieLens dataset by the collaborative filtering schemes and PrefER are compared and analyzed.The experimental results show that PrefER can provide preferential privacy protection with the improvement of recommendation accuracy.

关键词： preferential privacy protection differential privacy top-k recommendation personalized service

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How time latency in navigation Apps affects traffic

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The Journal of China Universities of Posts and Telecommunications 2022年第6期29卷 53-63页

作者： yang jingjing Guo Yuchun Zhao Yongxiang Chen Yishuai School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China

With the recent increase in routing App usage, it is urgent to analyze the impact of inevitable information delay in routing Apps on traffic.To analyze the negative impact of such delayed routing Apps on traffic, this paper investigates the impact of ideal and delayed routing Apps on traffic. Firstly, the effect of ideal routing Apps has been explored with theoretical analysis and derivation based on a macroscopic network model. Then, an extended network model is built to characterize the delayed routing.The impact of such delayed routing Apps is investigated by simulation experiments while considering routing usage proportion and amount of delay. The results demonstrate that ideal navigation does improve traffic efficiency, but in some cases, delayed navigation is even worse than no navigation.

关键词： traffic network delayed routing system performance

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Oral pyroptosis nanoinhibitor for the treatment of inflammatory bowel disease

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Nano Research 2024年第3期17卷 1748-1759页

作者： Zhenxing Zhu Dongtao Zhou Yi Yin Zhun Li Zhen Guo Yongchun Pan Yanfeng Gao jingjing yang Weiming Zhu Yujun Song Yi Li Department of General Surgery Affiliated Jinling HospitalMedical SchoolNanjing UniversityNanjing 210093China College of Engineering and Applied Sciences State Key Laboratory of Analytical Chemistry for Life ScienceNanjing UniversityNanjing 210023China Department of General Surgery Affiliated Drum Tower HospitalMedical SchoolNanjing UniversityNanjing 210008China Department of Biochemistry and Molecular Biology School of Medicine&Holistic Integrative MedicineJiangsu Collaborative Innovation Center of Chinese Medicinal Resources IndustrializationNanjing University of Chinese MedicineNanjing 210023China

Inflammatory bowel disease(IBD)is an autoimmune gastrointestinal disease characterized by chronic relapsing inflammation of the intestine.Excessive pyroptosis that exists in the inflamed intestine can activate damage signals and aggravate local inflammation in IBD.Here,we designed an oral pyroptosis nanoinhibitor,DXMS@CuM@PPADT@PSS(DCMP),which can target intestinal lesions,and respond to reactive oxygen species(ROS)to release active sites and drugs at the lesion.DCMP can inhibit the activation of the nucleotide-binding domain and leucine-rich repeat family pyrin domain containing 3(NLRP3)inflammasomes by scavenging ROS,resulting in the down-regulation of gasdermin D(GSDMD)cleavage thus inhibiting pyroptosis.It also improved intestinal barrier function,decreased inflammatory cytokine levels,and increased the diversity of gut microbiota in mice with colitis.This work is believed to expand the biomedical application of nanomaterials for innate immunity modulation.

关键词： inflammatory bowel disease nanoinhibitors pyroptosis synergistic therapy antioxidant

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非物质文化遗产保护传承的实践研究及对策分析——以河南省为例

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河南社会科学 2024年第4期32卷 87-93页

作者：杨静静河南中医药大学管理学院河南郑州450046

非物质文化遗产是中华优秀传统文化的重要组成部分,其保护传承工作意义重大。系统把握非物质文化遗产的历史价值、文化价值、经济价值、社会价值等多重价值,是推动非物质文化遗产创造性转化、创新性发展的有力支撑。河南历史文化积淀深... 详细信息

非物质文化遗产是中华优秀传统文化的重要组成部分,其保护传承工作意义重大。系统把握非物质文化遗产的历史价值、文化价值、经济价值、社会价值等多重价值,是推动非物质文化遗产创造性转化、创新性发展的有力支撑。河南历史文化积淀深厚,孕育了丰富的非物质文化遗产,具有种类丰、分布广、价值高和影响大的特点,在加强非物质文化遗产保护传承中形成了一系列卓有成效的实践探索,但同时也面临文化土壤流失、传承后继乏人、传播效能不佳等问题,今后应从挖掘价值、焕发生命力,善作善为、增强保护力,厚植基础、激活原动力,传承教育、注入新活力,守正创新、提升竞争力,数字赋能、提升传播力,加强宣传、扩大影响力七个方面,在融合创新中激发非遗保护传承的动力活力,在推动文化新辉煌中有更大作为。

关键词：非物质文化遗产保护传承价值对策

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高等教育缓解流动人口相对贫困的作用研究

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高教探索 2024年第2期 12-22页

作者：刘宁宁杨菁菁湖南师范大学教育科学学院长沙410081

在后扶贫时代,流动人口的相对贫困将是城市贫困发生的主要来源。基于2018年中国家庭追踪调查数据,对我国流动人口相对贫困的现状及高等教育缓解相对贫困的作用进行分析发现:(1)相对贫困问题在流动人口中覆盖范围较广,该群体的医疗、工... 详细信息

在后扶贫时代,流动人口的相对贫困将是城市贫困发生的主要来源。基于2018年中国家庭追踪调查数据,对我国流动人口相对贫困的现状及高等教育缓解相对贫困的作用进行分析发现:(1)相对贫困问题在流动人口中覆盖范围较广,该群体的医疗、工伤保险以及工会加入等权益缺失严重。(2)接受高等教育能够有效降低流动人口陷入相对贫困的概率,且其减贫成效存在显著的背景差异,即对已婚群体的影响大于未婚群体,对老生代群体的影响大于新生代群体,对流入东部、中部就业的群体的影响大于流入西部的群体。(3)高等教育主要通过提升流动人口的社会资本和信息能力来缓解流动人口的相对贫困。为此,政府要进一步完善社会保障体系、优化流动人口的教育培训、重构流动人口社会融合制度、提升流动人口信息能力。

关键词：高等教育流动人口相对贫困社会资本信息能力

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Fabrication of BiOBr-silicone aerogel photocatalyst in an aqueous system with degradation performance by sol-gel method

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Science China(Technological Sciences) 2020年第5期63卷 859-865页

作者： GE Bo REN GuiNa yang Hang yang jingjing PU XiPeng LI WenZhi JIN ChuanYu ZHANG ZhaoZhu School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China School of Environmental and Material Engineering Yantai UniversityYantai 264405China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

It is a challenge to endow the material with the ability to pollutants degradation while maintaining the oil/water separation performance. Herein, the mixed dispersion of BiOBr photocatalyst and silicone sol was adsorbed in melamine foam. Superhydrophobic BiOBr-silicone aerogel(WCA=154°) was obtained through the transfer melamine foam to an autoclave and reaction at 80℃ for 20 h. The prepared superhydrophobic BiOBr-silicone aerogel can effectively remove the water soluble pollutants which remain within the water phase after oil/water separation. The band gap of the superhydrophobic BiOBr-silicone aerogel was calculated to be 2.71 eV, which shows sensitivity to visible light(458 nm). Through mechanism analysis, it is found that the VB position of BiOBr is at 1.07 eV and the position of CB is at-1.64 eV. Finally, we prepared a superhydrophobic BiOBr-silicone aerogel(5 cm×5 cm×3 cm) for the verification of the large scale preparation.

关键词： BiOBr silicone aerogel melamine sponge water purification

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西部地区护理人力资源配置的区域差异及变化趋势

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中华护理杂志 2024年第13期59卷 1624-1632页

作者：阳晶晶刘婷婷陈洁婷石河子大学医学院护理系新疆维吾尔自治区石河子市832003

目的探索西部地区护理人力资源配置的区域差异及变化趋势,为护理人力资源均衡配置提供科学有效的依据。方法运用Dagum基尼系数、核密度估计方法、马尔可夫链等方法分析2011年—2020年西部地区12个省(区、市)护理人力资源配置的区域差异... 详细信息

目的探索西部地区护理人力资源配置的区域差异及变化趋势,为护理人力资源均衡配置提供科学有效的依据。方法运用Dagum基尼系数、核密度估计方法、马尔可夫链等方法分析2011年—2020年西部地区12个省(区、市)护理人力资源配置的区域差异、动态变化与趋势预测。结果从区域差异看,西部地区护理人力资源配置的总体地区差异呈缩小趋势,且主要源于地区内差异;城市、农村总体地区差异主要源于地区间差异。从动态变化过程看,西部地区护理人力资源配置水平不断提升且绝对差异逐步增大。从趋势预测看,西部地区护理人力资源配置各水平间转移概率低,空间因素对其产生极化影响。结论西部地区护理人力资源配置水平逐步提升,总体差异不断缩小,各配置水平护理人力资源具有稳定性,受空间因素影响明显。政府应建立区域、城市、县域护理专科联盟以及创新信息化护理服务模式,实施护理人才培养机制,以提高西部地区护理人力资源配置的均衡性。

关键词：护理人力资源西部地区 Dagum基尼系数核密度马尔可夫链护理管理研究

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金融科技的现金股利效应——基于中国A股上市公司的实证研究

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投资研究 2024年第3期43卷 43-65页

作者：杨菁菁罗梁丽吴凯茜广东外语外贸大学金融学院

金融科技借助各种信息技术与金融业务进行深度融合,降低了金融市场的摩擦,为企业稳定现金流提供了保障。本文使用2014-2019年沪深A股非金融行业上市公司财务数据,探究金融科技是如何利用信息技术影响上市企业现金股利政策及其传导机制,... 详细信息

金融科技借助各种信息技术与金融业务进行深度融合,降低了金融市场的摩擦,为企业稳定现金流提供了保障。本文使用2014-2019年沪深A股非金融行业上市公司财务数据,探究金融科技是如何利用信息技术影响上市企业现金股利政策及其传导机制,使投资者获得合理的投资回报。研究发现金融科技的发展能够增强企业发放现金股利的意愿和提高现金股利支付水平。该效应在民营企业、基金持股比例较高、经济不发达的西部地区、第一大股东持股比例较低的企业中更为显著。使用工具变量控制内生性问题后,以上结论依然稳健。进一步地,实证表明金融科技通过提高其覆盖广度和使用深度来促进企业发放现金股利。机制分析验证金融科技可以通过“缓解融资约束”和“提高公司治理水平”来影响企业现金股利支付。在金融供给侧改革背景下,我国应持续推进金融科技的创新,发挥其空间聚集效应和技术知识溢出效应,以创新驱动实体经济的高质量发展。

关键词：金融科技现金股利信息不对称融资约束公司治理水平

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