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Interface regulation of Cu_(2)Se via Cu–Se–C bonding for superior lithium-ion batteries

Nano Research 2023年第2期16卷 2421-2427页

作者： Kefu Zhu Shiqiang Wei Quan Zhou Shuangming Chen Yunxiang Lin Pengjun Zhang Yuyang Cao changda Wang Yixiu Wang Yujian Xia Dengfeng Cao Zeinab Mohamed Xin Guo Xiya Yang Xiaojun Wu Li Song National Synchrotron Radiation Laboratory Chinese Academy of Sciences(CAS)Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230029China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China School of Chemistry and Material Sciences University of Science and Technology of ChinaHefei 230026China

Transition metal selenides have aroused great attention in recent years due to their high theoretical ***,the huge volume fluctuation generated by conversion reaction during the charge/discharge process results in the significant electrochemical performance ***,the carbon-regulated copper(I)selenide(Cu_(2)Se@C)is designed to significantly promote the interface stability and ion diffusion for selenide *** systematic X-ray spectroscopies characterizations and density functional theory(DFT)simulations reveal that the Cu–Se–C bonding forming on the surface of Cu2Se not only improves the electronic conductivity of Cu_(2)Se@C but also retards the volume change during electrochemical cycling,playing a pivotal role in interface ***,the storage kinetics of Cu_(2)Se@C is mainly controlled by the capacitance process diverting from the ion diffusion-controlled process of *** employed this distinctive Cu_(2)Se@C as anode active material in Li coin cell configuration,the ultrahigh specific capacity of 810.3 mA·h·g^(−1)at 0.1 A·g^(−1)and the capacity retention of 83%after 1,500 cycles at 5 A·g^(−1)is achieved,implying the best Cu-based Li^(+)-storage capacity reported so *** strategy of heterojunction combined with chemical bonding regulation opens up a potential way for the development of advanced electrodes for battery storage systems.

关键词： Cu–Se–C bonding interface regulation lithium-ion battery X-ray absorption spectroscopy(XAS) operando synchrotron radiation X-ray diffraction(SRXRD)

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管卡板牙式锁紧机构轴向承载力的试验研究

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中国海洋大学学报（自然科学版） 2023年第1期53卷 122-129页

作者：石湘马长达何镇阳中国海洋大学工程学院山东青岛266100

板牙式锁紧机构提供全结构管卡加固管道的结构承载能力。为了解决在管卡设计中其轴向承载性能的有关结构计算问题,本文通过模型试验对4种规格的板牙式锁紧机构进行了轴向承载力测试,分析了内板牙齿挤毁管道表面并刮断累积金属屑层的锁... 详细信息

板牙式锁紧机构提供全结构管卡加固管道的结构承载能力。为了解决在管卡设计中其轴向承载性能的有关结构计算问题,本文通过模型试验对4种规格的板牙式锁紧机构进行了轴向承载力测试,分析了内板牙齿挤毁管道表面并刮断累积金属屑层的锁紧机构失效模式,借鉴刨削力计算公式拟合得到了板牙式锁紧机构单齿轴向承载力与咬入深度的经验公式,并分析了齿间距、齿顶角对单齿承载力的影响。试验结果表明对于相同齿顶角的锁紧机构,齿间距越大的单齿承载力越大;对于相同齿间距的锁紧机构,90°齿顶角的单齿承载力比80°齿顶角的大。

关键词：管卡板牙式锁紧机构轴向承载力模型试验经验公式

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In situ trapped high-density single metal atoms within graphene： Iron-containing hybrids as representatives for efficient oxygen reduction

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Nano Research 2018年第4期11卷 2217-2228页

作者： Daobin Liu Chuanqiang Wu Shuangming Chen Shiqing Ding Yaofeng Xie changda Wang Tao Wang Yasir A. Haleem Zia ur Rehman Yuan Sang Qin Liu Xusheng Zheng Yu Wang Binghui Ge Hangxun Xu Li Song National Synchrotron Radiation Laboratory Department of Physics Department of Polymer Science and Engineering CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei 230026 China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Atomically dispersed catalysts have attracted attention in energy conversion applications because their efficiency and chemoselectivity for special catalysis are superior to those of traditional catalysts. However, they have limitations owing to the extremely low metal-loading content on supports, difficulty in the precise control of the metal location and amount as well as low stability at high temperatures. We prepared a highly doped single metal atom hybrid via a single-step thermal pyrolysis of glucose, dicyandiamide, and inorganic metal salts. High-angle annular dark field-scanning transmission electron microscopy （HAADF-STEM） and X-ray absorption fine structure spectroscopy （XAFS） revealed that nitrogen atoms doped into the graphene matrix were pivotal for metal atom stabilization by generating a metal-Nx coordination structure. Due to the strong anchoring effect of the graphene matrix, the metal loading content was over 4 wt.% in the isolated atomic hybrid （the Pt content was as high as 9.26 wt.% in the Pt-doped hybrid）. Furthermore, the single iron-doped hybrid （Fe@N-doped graphene） showed a remarkable electrocatalytic performance for the oxygen reduction reaction. The peak power density was - 199 mW·cm-2 at a current density of 310 mA·cm-2 and superior to that of a commercial Pt/C catalyst when it was used as a cathode catalyst in assembled zinc-air batteries. This work offered a feasible approach to design and fabricate highly doped single metal atoms （SMAs） catalysts for potential energy applications.

关键词： single metal atoms (SMAs) high loading X-ray absorption fine structure spectroscopy (XAFS) high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) oxygen reduction reaction(ORR)

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连续焊接-冷拔生产焊管新技术

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钢铁 1989年第8期24卷 24-27,16页

作者：陈昌达上钢十厂钢管分厂

本文介绍了国内新发展的焊管连续焊接-冷拔生产新技术。它将焊接、冷拔、矫直,剪切等工序集于一休,实现了连续化生产。试验结果和生产实践表明效果显著。该项新技术不仅改进了国内巾、小直径焊管的生产状况,同时具有占用场地小,生产效率... 详细信息

本文介绍了国内新发展的焊管连续焊接-冷拔生产新技术。它将焊接、冷拔、矫直,剪切等工序集于一休,实现了连续化生产。试验结果和生产实践表明效果显著。该项新技术不仅改进了国内巾、小直径焊管的生产状况,同时具有占用场地小,生产效率高,金属消耗低等优点。

关键词：焊管焊接冷拔连续化生产

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An Image Hidden Transmission Method of Networked Inverted Pendulum Visual Servo Control System

An Image Hidden Transmission Method of Networked Inverted Pe...

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第32届中国控制与决策会议

作者： Bing Liu Dajun Du Xue Li changda Zhang Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and AutomationShanghai University

In the real-time control of Networked Inverted Pendulum Visual Servo Control Systems（NIPVSCSs）,how to achieve safe and efficient image transmission is an important and challenging ***,the inverted pendulum image is directly transmitted so that the security of images during the network transmission can not be guaranteed in the *** solve this problem,our contributions of the paper include:1) A Chaos-based Image Hiding（CIH） algorithm to hide the inverted pendulum image is used to improve the security of the image during the network transmission;2)The effectiveness and feasibility of the proposed method is confirmed by simulations and real-time control experiments.

关键词： Inverted pendulum Chaos-based Image hiding Security of image Network transmission

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基于光学纳米结构的物理型信息安全技术

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中国激光 2023年第18期50卷 110-126页

作者：薛建材周长达何国立李锶阳周张凯广东工业大学物理与光电工程学院广东省信息光子技术重点实验室广东广州510006 中山大学物理学院光电材料与技术国家重点实验室广东广州510275

信息安全对人类社会极为重要,关系到个人和各类组织的财产与安全,因此一直以来受到人们的极大关注。其中,物理型信息安全技术因其物理载体和实现原理的多样性和隐匿性而具有极高的安全性。当前,通过引入特征尺寸小、功能丰富的光学纳米... 详细信息

信息安全对人类社会极为重要,关系到个人和各类组织的财产与安全,因此一直以来受到人们的极大关注。其中,物理型信息安全技术因其物理载体和实现原理的多样性和隐匿性而具有极高的安全性。当前,通过引入特征尺寸小、功能丰富的光学纳米结构,物理型信息安全技术借助纳米尺度光场调控的新方法和新实践,在信息容量、安全性和功能性等方面都得到了极大提升。为厘清该领域的发展脉络与方向,本文将回顾近年来基于光学纳米结构的物理型信息安全技术的新发展,介绍该技术的基本原理、实现方法与优势特点,重点阐述其中的基于表面结构色图像、全息和轨道角动量的信息安全技术。此类信息安全技术不仅对于军用、民用机密信息防护具有重要意义,而且在商标防伪和身份认证等领域也有着巨大的应用潜能。

关键词：全息纳米结构信息安全技术结构色轨道角动量

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经皮椎间孔入路脊柱内镜下应用骨凿技术减压治疗老年单侧腰椎侧隐窝狭窄的疗效

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西安交通大学学报（医学版） 2021年第6期42卷 813-816页

作者：王贺谢昌达王辰超李展奇西安市人民医院/西安市第四医院陕西西安710004

目的观察经皮椎间孔入路脊柱内镜下应用骨凿技术减压治疗老年单侧腰椎侧隐窝狭窄的疗效。方法选取本院2017年3月-2019年7月年龄>60岁且因单侧腰椎侧隐窝狭窄症接受经皮椎间孔入路脊柱内镜手术的患者46例,收集患者术前、术后的VAS评分、... 详细信息

目的观察经皮椎间孔入路脊柱内镜下应用骨凿技术减压治疗老年单侧腰椎侧隐窝狭窄的疗效。方法选取本院2017年3月-2019年7月年龄>60岁且因单侧腰椎侧隐窝狭窄症接受经皮椎间孔入路脊柱内镜手术的患者46例,收集患者术前、术后的VAS评分、ODI指数及改良MacNab疗效等指标评估疼痛、腰椎功能及患者满意度,比较术前、术后CT侧隐窝矢状径评估侧隐窝减压情况。随访至少1年并观察并发症情况。结果 46例患者均接受随访,随访时间17~42个月,1例出现硬脊膜撕裂,2例出现一过性神经根刺激症状,无其他并发症。所有患者末次随访的腰痛VAS评分、下肢痛VAS评分及ODI指数较术前明显改善(P<0.05)。末次随访时改良MacNab疗效评估结果显示,优良率91.3%(优38、良4、可4)。骨性侧隐窝矢状径(mm)术后1年较术前显著改善(4.22±1.25 vs. 2.71±0.57,t=6.354,P<0.001)。矢状径平均增加55.8%。结论经皮椎间孔入路脊柱内镜下应用骨凿技术减压治疗老年单侧侧隐窝狭窄可获得良好临床疗效。

关键词：侧隐窝狭窄症椎间孔入路骨凿技术经皮脊柱内镜老年患者

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Glycyrrhiza uralensis flavonoids inhibit brain microglial cell TNF-α secretion,p-IκB expression,and increase brain-derived neurotropic factor(BDNF)secretion

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Journal of Traditional Chinese Medical Sciences 2014年第1期1卷 28-37页

作者： Sangita P.Patil changda Liu Joseph Alban Nan Yang Xiu-Min Li Department of Pediatrics Division of Pediatric Allergy and ImmunologyJaffe Food Allergy InstituteCenter for Integrative Medicine for Allergies and WellnessIcahn School of Medicine at Mount Sinai1425 Madison AvenueBox 1089New YorkNY 10029-6574USA

Objective:Asthma sufferers exhibit high prevalence of anxiety/*** tumor-necrosis factor-alpha(TNF-α)levels in peripheral system and central nervous system(CNS)are associated with anxiety/depression,whereas brain-derived neurotropic factor(BDNF)has anti-depressant *** anti-asthma herbal medicine intervention ASHMI inhibits peripheral TNF-αsecretion in an animal model of *** hypothesize that ASHMI and its compounds may have modulatory effects on CNS TNF-αand BDNF *** sought to determine the effect of ASHMI and individual herb constituents on brain microglial cell TNF-αproduction,and identify the active compounds that suppress TNF-αand increase ***:BV-2 mouse microglial cells were pre-treated with ASHMI or extracts of Ganoderma lucidum(***),Sophora flavescens Ait(***),and Glycyrrhiza uralensis Fischer(***),the herbal constituents in ASHMI,or individual compounds isolated from *** at different concentrations and then stimulated with ***-αlevels in culture supernatants were measured by *** effect of active compounds on NFkB signaling pathway and on BDNF production were determined by western blotting and ELISA,***:ASHMI produced dose-dependent inhibition of TNF-αsecretion by cultured-mousemicroglia BV2 *** the three herb extracts in ASHMI,only *** significantly and dosedependently inhibited TNF-α*** the 5 flavonoids isolated from ***,isoliquiritigeninwas themost *** suppression of TNF-αproduction was associated with attenuation of p-NF-kB expression,andwas accompanied by increased BDNF ***:ASHMI and its effective flavonoid,isoliquiritigenin,inhibited TNF-αproduction by LPS stimulatedmicroglial cells and elevated BDNF levels,which may prove to have anti-CNS inflammatory and anti-anxiety effects.

关键词： Anti-asthma herbal medicine intervention Anxiety and asthma Flavonoids TNF-α BDNF

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A Honeypot-based Attack Detection Method for Networked Inverted Pendulum System

A Honeypot-based Attack Detection Method for Networked Inver...

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第40届中国控制会议

作者： Baoyue Xu Dajun Du changda Zhang Jin Zhang Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and AutomationShanghai University

The data transmitted via the network may be vulnerable to cyber attacks in networked inverted pendulum system（NIPS）,how to detect cyber attacks is a challenging *** solve this problem,this paper investigates a honeypot-based attack detection method for ***,honeypot for NIPS attack detection（namely NipsPot） is constructed by deceptive environment module of a virtual closed-loop control system,and the stealthiness of typical covert attacks is ***,attack data is collected by NipsPot,which is used to train supported vector machine（SVM） model for attack ***,simulation results demonstrate that NipsPot-based attack detector can achieve the accuracy rate of 99.78%,the precision rate of 98.75%,and the recall rate of 100%.

关键词： networked inverted pendulum system covert attacks NipsPot supported vector machine

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铁路曲线正矢合计闭合差分析与处理探讨

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铁道建筑 2006年第3期46卷 76-77页

作者：邓昌大湖南交通工程职业技术学院交通工程系湖南衡阳421001

通过对计划正矢编制和正矢测量误差分析,剖析了曲线正矢合计闭合差产生的原因,提出了曲线正矢合计闭合差的限值标准,介绍正矢合计闭合差的正确处理方法和绳正法的使用要点。

关键词：计划正矢实测正矢等精度双观测误差正矢合计闭合差绳正法

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