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∼2.5 nm pores in carbon-based cathode promise better zinc-iodine batteries

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Chinese Chemical Letters 2024年第5期35卷 471-476页

作者： yajun hou Chuanzheng Zhu Qiang Wang Xiaomeng Zhao Kun Luo Zongshuai Gong Zhihao Yuan School of Materials Science and Engineering Tianjin Key Laboratory of Photoelectric Materials&DevicesTianjin University of TechnologyTianjin 300384China

The relationship mechanism between the material pore structures and cathodic iodine chemistry plays a vital role in efficient Zn-I_(2) batteries,but is unclear,retarding further advances.This work innovatively indicates a great contribution of∼2.5nm pore structure of nanocarbons to efficient iodine adsorption,rapid I^(−)↔I_(2) conversion,and polyiodide inhibition,via scrupulously designing catalysts with controllable pore sizes systematically.The I_(2)-loading within the designed nitrogen-doped nanocarbons can reach up to as high as 60.8 wt%.The batteries based on the cathode deliver impressive performances with a large capacity of 178.8 mAh/g and long-term cycling stability more than 4000 h at 5.0 C.Notably,these is no polyiodide such as I_(3)−and I_(5)−detected during the charge-discharge processes from comprehensive electrochemical cyclic voltammetry,X-ray photoelectron spectroscopy,and Raman technique.This work provides a novel knowledge-guided concept for rational pore design,promising better Zn-I_(2) batteries,which is also hoped to benefit other advanced energy technologies,such as Li-S,Li-ion,and Al-I_(2) batteries.

关键词： Zinc-iodine batteries Structure-performance relationship Iodine conversion chemistry Cathode materials Porous carbon

High-static-low-dynamic stiffness isolator based on an electromagnetic negative stiffness spring with long linear stroke

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Science China(Technological Sciences) 2024年第3期67卷 740-752页

作者： YUAN ShuJin WU yajun SONG DaiPing PU HuaYan MOU LiSheng hou Lei ZHAO JingLei LI XuePing LUO Jun WU Jie HUANG XiaoXu State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China China Aerodynamics Research and Development Center Mianyang 621000China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

Negative stiffness mechanisms can improve low-frequency vibration isolation performance and have been widely used in the vibration isolation of precision equipment. However, the negative stiffness mechanism usually introduces a nonlinear stiffness,resulting in a nonlinear response and worsening the vibration isolation performance, especially under large amplitude vibration.In this paper, an electromagnetic spring with linear negative stiffness(ESLNS) is proposed, in which the antagonistic ampere forces of the energized coils are used to generate negative stiffness within a long linear stroke. The magnetic field distribution is improved through the design of the magnetic circuit, thereby increasing the stiffness generation efficiency. The stiffness can be adjusted bidirectionally by current within the range of positive and negative stiffness. An electromagnetic stiffness model was established based on the equivalent magnetic circuit method. Experimental measurements verified the accuracy of the model and proved the linearity of the electromagnetic spring. A vibration isolator with high static and low dynamic stiffness(HSLDS) based on the ESLNS is designed and tested. The experimental results prove that the introduction of the ESLNS can effectively expand the isolation frequency band without changing the equilibrium position. Moreover, the vibration isolator with ESLNS does not produce nonlinear response. The proposed electromagnetic spring with linear negative stiffness extends the application range of HSLDS isolators to a large amplitude vibration environment.

关键词： linear negative stiffness mechanism low-frequency vibration isolation electromagnetic spring vibration control

基于SDN具有缓存感知的NDN节点拥塞控制策略

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天津大学学报（自然科学与工程技术版） 2023年第2期56卷 214-220页

作者：刘开华侯雅俊李卓宫霄霖罗蓬天津大学微电子学院天津300072 天津市成像与感知微电子技术重点实验室天津300072 鹏城实验室深圳518000 国网河北省电力有限公司电力科学研究院石家庄050021

命名数据网(named data networking,NDN)作为一种新型的互联网架构,旨在应对日益增长的数据流量.然而,随着用户需求进一步增长,拥塞控制对于多路径传输的命名数据网仍然是一个具有挑战性的问题,亟需一种能够快速地检测网络拥塞和有效地... 详细信息

命名数据网(named data networking,NDN)作为一种新型的互联网架构,旨在应对日益增长的数据流量.然而,随着用户需求进一步增长,拥塞控制对于多路径传输的命名数据网仍然是一个具有挑战性的问题,亟需一种能够快速地检测网络拥塞和有效地管理网络资源的拥塞控制机制.针对这一问题,提出了一种基于软件定义网络技术的、具有缓存感知功能的命名数据网节点拥塞控制策略,称BCMCC.首先,介绍了BCMCC的新型网络架构.利用软件定义网络控制平面与数据平面解耦合技术,该架构将拥塞控制功能集中于SDN控制器中,以实现集中式节点拥塞控制、降低节点运行负荷的目的.其次,基于新型网络架构,研究了BCMCC的缓存感知算法和多路径选择拥塞控制算法.其中,缓存感知算法实现了网络缓存内容的感知以及缓存内容全局流行度的计算,能够利用命名数据网的节点缓存特性,降低缓存内容对拥塞控制的影响;多路径选择拥塞控制算法协同节点更新转发端口信息以实现流量迁移、智能化管理多路径容量,达到提高网络资源利用率、有效避免和缓解网络拥塞的目的.最后,在ndnSIM仿真平台进行BCMCC的性能测试.实验结果表明,BCMCC在丢包量、网络吞吐量以及传输时延等方面优于Best-Route算法、NCC算法和Random算法.在网络流量相同的情况下,BCMCC平均传输时延比Random低14.16%,比NCC低22.68%,比Best-Route低17.24%,同时相比Best-Route具有更稳定的网络吞吐量.BCMCC可以有效解决命名数据网拥塞问题.

关键词：命名数据网缓存感知多路径选择拥塞控制软件定义网络

互联网背景下高职经管类专业学生自适应学习可行性探究

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成才之路 2022年第11期 53-55页

作者：侯亚军长春职业技术学院吉林长春130000

自适应学习有助于提高学生的自主学习能力,帮助学生实现终身学习目标。当前互联网背景,能够为高职经管类专业学生进行自适应学习提供条件支持,学生进行自适应学习具有可行性。文章介绍自适应学习的内涵,分析高职经管类专业学生自适应学... 详细信息

自适应学习有助于提高学生的自主学习能力,帮助学生实现终身学习目标。当前互联网背景,能够为高职经管类专业学生进行自适应学习提供条件支持,学生进行自适应学习具有可行性。文章介绍自适应学习的内涵,分析高职经管类专业学生自适应学习现状及产生这种现状的原因,并论证高职经管类专业学生自适应学习的可行性,探索高职经管类专业学生自适应学习模式的构建策略。

关键词：互联网背景高职经管类专业自适应学习可行性

Emergence of highly pathogenic avian influenza A(H5N8)clade 2.3.4.4b viruses in grebes in Inner Mongolia and Ningxia,China,in 2021

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Journal of Integrative Agriculture 2024年第1期23卷 348-353页

作者： Qiuzi Xu Xinru Lü Yi Li Hua Luo Zhen Zhang Xiang Li Rongxiu Qin Qing An Fengyi Qu Zhenliang Zhao Chengbo Zhang Weidong Wang Yuecheng Li yajun Wang Xiangwei Zeng Zhijun hou Jingqiang Ren Yulong Wang Yanbing Li Hongliang Chai College of Wildlife and Protected Area Northeast Forestry UniversityHarbin 150040China Harbin Veterinary Research Institute Chinese Academy of Agricultural SciencesHarbin 150040China Wenzhou Key Laboratory for Virology and Immunology Institute of VirologyWenzhou UniversityWenzhou 325000China Ordos Forestry and Grassland Administration Ordos 017000China Monitoring Center for Terrestrial Wildlife Epidemic Diseases Yinchuan 750000China

Highly pathogenic avian influenza(HPAI)subtype H5Nx viruses have spread globally and are a major concern for poultry,wild birds,mammals,and even humans(de Vries et al.2015;Zeng et al.2022).The hemagglutinin(HA)genes of H5 subtype viruses have evolved into multiple clades and some of these clades have been further divided into subclades(Cui et al.2022).Clade 2.***.4.4H5N8 HPAI viruses(HPAIVs)have caused several waves of disease outbreaks in wild birds and domestic poultry(Wang et al.2022).

关键词： poultry Ningxia influenza

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BCK-代数的稳定化子

浙江大学学报（理学版） 2023年第1期50卷 20-24页

作者：程晓云王军涛杨青侯亚军西安航空学院理学院陕西西安710077 西安石油大学理学院陕西西安710065

引入了BCK-代数的稳定化子概念,给出了其相关性质,重点研究了左稳定化子与正则理想之间的关系。进一步,引入了BCK-代数的相对稳定化子概念,讨论了相对稳定化子与正则理想、固执理想及布尔理想之间的关系。借助左相对稳定化子,证明了BCK... 详细信息

引入了BCK-代数的稳定化子概念,给出了其相关性质,重点研究了左稳定化子与正则理想之间的关系。进一步,引入了BCK-代数的相对稳定化子概念,讨论了相对稳定化子与正则理想、固执理想及布尔理想之间的关系。借助左相对稳定化子,证明了BCK-代数的所有理想之集构成一个相对伪补格。

关键词： BCK-代数稳定化子相对稳定化子理想相对伪补格

松质骨弹性模量与表观密度的关系──基于杆-杆结构和带孔板结构相结合的模型

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生物医学工程学杂志 2006年第1期23卷 78-81页

作者：侯亚君朱兴华吉林大学机械科学与工程学院

从杆-杆结构模型开始,然后以此框架为基础逐渐填加固体物质形成带孔板的框架模型,从而将松质骨的两种微结构模型结合起来,利用均匀化理论计算松质骨的弹性模量,通过对所得结果的分析,讨论了松质骨的弹性模量与表观密度的关系。得出弹性... 详细信息

从杆-杆结构模型开始,然后以此框架为基础逐渐填加固体物质形成带孔板的框架模型,从而将松质骨的两种微结构模型结合起来,利用均匀化理论计算松质骨的弹性模量,通过对所得结果的分析,讨论了松质骨的弹性模量与表观密度的关系。得出弹性模量与表观密度的关系为E=1.781ρ.88(GPa),该结果与用胞元结构理论导出的关系式比较接近,可能更合理。

关键词：松质骨弹性模量表观密度微结构均匀化理论

L-Ergothioneine ameliorates MPTP-induced Parkinson's disease in C57BL/6J mice by activating DJ-1

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Food Science and Human Wellness 2024年

作者： Xianshe Meng# Huawen Meng# Shuzeng hou Zequn Yin Xuerui Wang Ke Gong Feng Zhang Qingshan Li Shuang Zhang Yuanli Chen Xiaoxiao Yang Zhiwei Zhao Chenzhong Liao yajun Duan Department of Cardiology the First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes Hefei University of Technology

Parkinson’s disease (PD) is one of the most common neurodegenerative diseases. The loss of dopaminergic (DAergic) neurons in the substantia nigra and the decrease of dopamine (DA) levels accelerate the process of PD. L-Ergothioneine (EGT) is a natural antioxidant derived from microorganisms， especially in edible mushrooms. EGT can penetrate blood-brain barrier and its levels are significantly decreased in the plasma of PD patients. Therefore， we speculated that EGT could ameliorate PD， and determined its effect on PD development by using 1-methyl-4-phenyl-1，2，3，6-tetrahydropyridine (MPTP)-induced PD mouse models and neurotoxin 1-methyl-4-phenylpyridinium (MPP+)-induced cell models. Our results show that EGT alleviated MPTP-induced behavioral dysfunction in mice. Mechanistically， we innovatively revealed that EGT is a key regulator of DJ-1. EGT restored DA levels by activating the DJ-1-Nuclear receptor-related factor 1(Nurr1) axis. Furthermore， it reduced reactive oxygen species (ROS) levels by regulating the DJ-1-Nuclear factor erythroid 2-related factor 2 (Nrf2) pathway， which inhibited oxidative stress-induced DAergic neuronal apoptosis. Combined treatment with DJ-1-siRNA transfection revealed that blocking DJ-1 reversed EGT upregulated Nurr1 and Nrf2 expression in the nucleus， which significantly decreased the benefits of EGT. Taken together， our study suggests that EGT can ameliorate PD and be considered as a strategy for PD treatment.

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有限公司股权流通与人合性保护的利益衡量以可持续发展为视角

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法学论坛 2024年第3期39卷 143-152页

作者：侯东德韦雅君西南政法大学民商法学院重庆401120

“南钢控制权转让案”中间接收购与股东优先购买权的冲突背后蕴藏着有限公司股权流通与人合性保护的利益冲突。在可持续发展的框架下,促进股权流通和保护有限公司的人合性在一定程度上分别契合促进充分竞争、实现长期价值、保护整体利... 详细信息

“南钢控制权转让案”中间接收购与股东优先购买权的冲突背后蕴藏着有限公司股权流通与人合性保护的利益冲突。在可持续发展的框架下,促进股权流通和保护有限公司的人合性在一定程度上分别契合促进充分竞争、实现长期价值、保护整体利益的内在要求,但在二者相互冲突的情形下,则需要通过利益衡量作出取舍。依据股权之流通性优于有限公司之人合性的利益衡量结果,公司法变革应区分有限公司的资合属性与人合性特征,改变股权转让触发股东优先购买权的条件,细化关于“同等条件”的具体规定,对有限公司股权对外转让中股东优先购买权的行使进行限制,促进股权自由流通。

关键词：间接收购股东优先购买权股权转让人合性公司法改革