检索结果-南通市图书馆

Reconstructing interfacial manganese deposition for durable aqueous zinc-manganese batteries

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第10期10卷 139-150页

作者： yida hu Zhexuan Liu Lanyan Li Shan Guo Xuefang Xie Zhigao Luo Guozhao Fang Shuquan Liang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South University School of Science Hunan University of Technology and Business College of Physical Science and Technology Xinjiang University College of Chemistry Xiangtan University

Low-cost,high-satety,and broad-prospect aqueous zinc-manganese batteries(ZMBs) are limited by complex interracial *** solid-liquid interfacial state of the cathode dominates the Mn dissolution/deposition process of aqueous ZMBs,especially the important influence on the mass and charge transfer behavior of Zn2+and Mn2+.We proposed a quasi-eutectic electrolyte(QEE) that would stabilize the reversible behavior of interracial deposition and favorable interracial reaction kinetic of manganese-based cathodes in a long cycle process by optimizing mass and charge *** emphasize that the initial interfacial reaction energy barrier is not the main factor affecting cycling performance,and the good reaction kinetics induced by interfacial deposition during the cycling process is more conducive to the stable cycling of the battery,which has been confirmed by theoretical analysis,quartz crystal microbalance with dissipation monitoring,depth etching X-ray photon-electron spectroscopy,*** a result,the QEE electrolyte maintained a stable specific capacity of 250 mAh g-1at 0.5 A g-1after 350 cycles in zinc-manganese *** energy density retention rate of the ZMB with QEE increased by 174%compared to that of conventional aqueous ***,the multi-stacked soft-pack battery with a cathodic mass load of 54.4 mg maintained a stable specific capacity of 200 mAh g-1for 100 cycles,demonstrating its commercial *** work proves the feasibility of adapting lean-water QEE to the stable aqueous ZMBs.

关键词： quasi-eutectic electrolyte aqueous zinc −manganese batteries solid −liquid interfacial state mass transfer charge transfer

Center tracking for healthy and diseased cardia

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2021年第11期64卷 243-244页

作者： Baiquan SU Yunlai TENG Zehao WANG yida hu Shaolong KUANG Ye WANG Tingting ZHANG Jie TANG Wei YAO Ye ZONG Medical Robotics Laboratory School of Automation Beijing University of Posts and Telecommunications Brigham and Women's Hospital Harvard Medical School Robotics and Microsystems Center School of Mechanical Engineering Soochow University Gastroenterology Department Peking University Third Hospital Department of Gastroenterology Beijing Friendship Hospital Capital Medical University Neurosurgery Department Xuanwu Hospital Capital Medical University

Dear editor,Autonomous gastrointestinal robots are the future form of traditional manually operated endoscopes for reducing adverse events, such as perforation of the gastrointestinal tract [1–3]. Cardia center detection is a key task for gastrointestinal robots to autonomously enter the stomach to fulfill inspection and therapeutic operations. However, none of the existing studies addresses the problem of finding the center of the cardia, i.e., an image guidance task serving the gastrointestinal robots for passing the cardia.

关键词： Information Systems and Communication Service

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

显微手术机器人末端微小型传感器集成研究

北京航空航天大学学报 2005年第7期31卷 794-798页

作者：胡一达李大寨杨洋孙旭光北京航空航天大学机械工程及自动化学院北京100083 北京市眼科研究所北京100730

为提高显微手术机器人实施手术的效果,需要在机器人末端集成微小型传感器.在提出传感器集成设计要求的基础上,研究机器人末端环钻钻切力和深度的测量机理.采用微型力传感器和微型位移传感器测量手术中的钻切力和深度信息.采用线性滑动... 详细信息

为提高显微手术机器人实施手术的效果,需要在机器人末端集成微小型传感器.在提出传感器集成设计要求的基础上,研究机器人末端环钻钻切力和深度的测量机理.采用微型力传感器和微型位移传感器测量手术中的钻切力和深度信息.采用线性滑动轴承和差动测杆机构实现对相应手术信息的测量.开发传感器数据采集卡,用功率谱估计分析传感器数据,并提出两种数字滤波方法来消除干扰信号.两种方法分别适合于PC机的低通、带阻串联结构滤波器和适合于数据采集卡的移动平均滤波算法.钻切实验表明,机器人末端传感器集成满足设计要求,末端环钻可以准确完成手术操作.

关键词：机器人传感器集成显微手术

在线全文

学校读者我要写书评

暂无评论

角膜移植显微手术机器人系统的研究

高技术通讯 2005年第1期15卷 49-53页

作者：胡一达李大寨宗光华孙旭光北京航空航天大学机器人研究所北京市眼科研究所

在借鉴眼外科显微手术机器人系统研究经验基础上,对角膜移植显微手术机器人系统结构进行深入的研究,针对角膜移植手术的过程和特点,对角膜移植显微手术机器人系统的手术流程、交互方式进行了分析,提出了合理的机器人系统物理结构.研究... 详细信息

在借鉴眼外科显微手术机器人系统研究经验基础上,对角膜移植显微手术机器人系统结构进行深入的研究,针对角膜移植手术的过程和特点,对角膜移植显微手术机器人系统的手术流程、交互方式进行了分析,提出了合理的机器人系统物理结构.研究了机构型式、末端手术工具、各子系统的关系,并开发了研制样机.切割实验表明,系统设计满足手术要求,可以准确完成手术动作.

关键词：显微手术角膜移植手术眼外科手术要求研究实验末端机器人系统物理结构系统设计

Exploiting H-induced lattice expansion in β-palladium hydride for enhanced catalytic activities toward oxygen reduction reaction

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第3期98卷 205-211页

作者： Yunwei Liu Zelin Chen Chang Liu Jinfeng Zhang Wenbin hu yida Deng Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300372China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China

We have developed an efficient strategy to synthesize an active and durable electrocatalyst of Pd hydride nanocubes(NCs).Instead of the traditional chemical method,the PdH_(0.43)NCs are firstly prepared via a hydrogen diffusion procedure,followed by hydrothermal synthesis of an amorphous CuO layer encapsulating the PdH_(0.43)NCs to prevent the hydrogen atoms from *** lattice expansion is demonstrated playing a pivotal role in the enhancement of their oxygen reduction reaction(ORR)activity and *** obtained PdH_(0.43)@CuO NCs catalysts exhibit an ORR mass activity of 0.18 A mg^(−1) at 0.90 V versus reversible hydrogen electrode in an alkaline medium,which is about five times higher than that of commercial Pt/*** durability tests show that there is only a 32 mV decay in halfwave potential even after 10,000 potential cycles,indicating the excellent stability of PdH_(0.43)@CuO *** functional theory(DFT)calculations also indicate that,compared to Pd,PdH_(0.43)has a lower limiting barrier to form OH−during the ORR *** present study illustrates the importance of lattice expansion caused by hydrogen and offers an available strategy to design highly efficient and durable Pdbased electrocatalysts for alkaline fuel cells.

关键词： Lattice expansion Pd hydride Amorphous CuO Elecrocatalysis Oxygen reduction reaction

How the surface Cu layer affected the activity of Ni foil for alkaline hydrogen evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第2期169卷 11-18页

作者： Qingfeng hu Yuan Liu Xuerong Zheng Jinfeng Zhang Jiajun Wang Xiaopeng Han yida Deng Wenbin hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

Synthesizing bimetallic nanomaterials,with noble metals as the surface layers and inert metals as the substrates,has been proven to be an effective way to reduce the use of noble metals with maintained catalytic ***,an atomic diffusion from the inert substrate to the surface during the long-term operation has been reported to significantly decrease the *** this work,a series of catalysis-inert Cu-coated Ni foil were fabricated through electrodeposition and their activities for alkaline hydrogen evolution were ***,the Ni/Cu-60 sample showed a similar catalytic property with pure Ni foil and only a slight decrease in HER activity was *** X-ray photoelectron spectroscopy(XPS)results indicated a decreased electron concentration of Cu in Ni/Cu-60,and theoretical calculations further demonstrated the electron transfer between the Ni substrate and Cu *** results reveal that a specific composition or structure of an inert metal layer might not significantly decrease the electrocatalytic activity of active ***,there are more possibilities for the rational design of metal-based catalysts for electrocatalysis.

关键词： Bimetallic heterostructure Charge redistribution Water splitting Alkaline hydrogen evolution

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

针对进修医师的临床脑电图教学策略

中华医学教育探索杂志 2016年第11期15卷 1166-1170页

作者：胡以达李凤全凤英刘光维王学峰重庆医科大学附属第一医院神经内科 400016

脑电图学内容广泛、理论抽象、图形复杂，而进修医师之间专业水平、学习能力及主观能动性存在差异，进修带教难度较大。为提高带教质量、更好地为进修医师服务，在教学过程中应用了如下策略：既根据每位进修医师实际情况拟定培训目标，... 详细信息

脑电图学内容广泛、理论抽象、图形复杂，而进修医师之间专业水平、学习能力及主观能动性存在差异，进修带教难度较大。为提高带教质量、更好地为进修医师服务，在教学过程中应用了如下策略：既根据每位进修医师实际情况拟定培训目标，又端正其学习态度、促其服从教学安排；既立足于电极安装、诱发试验设置、床旁监测排除干扰等操作技能培训，又促使进修医师用纵向发展变化和横向比较的视角在实际判读过程中寻找图形的规律；既规范其报告，又不断开拓其视野。

关键词：脑电图进修医师教学策略

Powder metallurgy synthesis of porous Ni-Fe alloy for oxygen evolution reaction and overall water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第2期37卷 154-160页

作者： Wenbo Li Qingfeng hu Yunwei Liu Mengmeng Zhang Jiajun Wang Xiaopeng Han Cheng Zhong Wenbin hu yida Deng Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072China

Developing inexpensive and high efficient catalysts is essential for generating oxygen and hydrogen via water ***,based on powder metallurgy,a Ni-Fe based compound(Ni8Fe2 alloy)with unique porous structure and controllable phase has been designed and *** using a solvent or template,the alloy exhibits a porous structure with uniformly distributed *** obtained Ni8Fe2 alloy exhibits an efficient oxygen evolution reaction(OER)performance and good longterm stability in alkaline electrolyte(i.e.1.0 M KOH).Additionally,an alkaline water splitting device has been assembled using porous Ni8Fe2 alloy as both anode and cathode *** system requires a cell voltage of 1.65 V to reach the 10 mA cm-2 current density for overall water splitting and maintains good stability for 25 *** efficient electrocatalytic performance of the Ni8Fe2 alloy is owing to the unique porous microstructure,increased active sites and accelerated charge ***,the reaction kinetics of OER are significantly promoted.

关键词： Water splitting Oxygen evolution reaction Ni-Fe alloy Porous structure

Selective electrocatalytic reduction of CO_(2) to formate via carbon-shell-encapsulated In_(2)O_(3) nanoparticles/graphene nanohybrids

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第26期121卷 220-226页

作者： Yidu Wang Jingnan Ding Jun Zhao Jiajun Wang Xiaopeng Han yida Deng Wenbin hu Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhouBinhai New City 350207China

Constructing nanohybrids with a synergistic effect using multi-components and specific micro/nanostructures can significantly enhance their electrocatalytic *** this work,we fabricated an In_(2)O_(3)■NC@GO nanohybrid,in which In_(2)O_(3)nanoparticles(NPs)were encapsulated by an N-doped carbon(NC)shell and supported on *** multi-components in In_(2)O_(3)■NC@GO synergistically optimize the structural and electronic properties of the *** particle size and dispersion of In_(2)O_(3)NPs were optimized owing to the separation effect of the amorphous NC shell and graphene *** separation effect exposes more number of active sites for the electrochemical *** oxygen vacancies exist in In_(2)O_(3),leading to a stronger ability for the adsorption and activation of *** NC shell inhibits the direct contact between the electrolyte and In_(2)O_(3),which significantly suppresses competitive *** charge transfer during the electrocatalysis process is also effectively enhanced due to the carbon *** synergistic effect of multi-components in the In_(2)O_(3)■NC@GO sample results in a significantly improved COreduction reaction performance with a high HCOOFaradic efficiency(FE)of 91.2%and a current density of 40.38 m A cmat–0.8 V obtained using a flow *** present work demonstrates that rationally designing nanohybrids with multifunctional components is an effective strategy for optimizing the structural and electrocatalytic properties of materials for energy conversion.

关键词： In_(2)O_(3) CO_(2)reduction electrocatalyst Oxygen vacancies N-doped carbon Nanohybrids