检索结果-南通市图书馆

Wearable Robots for human Underwater Movement Ability Enhancement:A Survey

iEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 967-977页

作者： h.isheng xia Muhammad Alamgeer Khan Zhijun Li MengChu zhou iEEE Department of Automation University of Science and Technology of ChinaHefei 230026China institute of Artificial intelligence Hefei Comprehensive National Science CenterHefei 230026China helen and John C.hartmann Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewark NJ 07102 USA Department of Cyber-Physical Systems St.Petersburg State Marine Technical UniversitySt.Petersburg 198262Russia

Underwater robot technology has shown impressive results in applications such as underwater resource *** underwater applications that require extremely high flexibility,robots cannot replace skills that require human dexterity yet,and thus humans are often required to directly perform most underwater *** robots(exoskeletons)have shown outstanding results in enhancing human movement on *** are expected to have great potential to enhance human underwater *** purpose of this survey is to analyze the state-of-the-art of underwater exoskeletons for human enhancement,and the applications focused on movement assistance while excluding underwater robotic devices that help to keep the temperature and pressure in the range that people can *** work discusses the challenges of existing exoskeletons for human underwater movement assistance,which mainly includes human underwater motion intention perception,underwater exoskeleton modeling and human-cooperative *** research should focus on developing novel wearable robotic structures for underwater motion assistance,exploiting advanced sensors and fusion algorithms for human underwater motion intention perception,building up a dynamic model of underwater exoskeletons and exploring human-in-theloop control for them.

关键词： Cyborg intelligence diving exoskeleton intention perception modeling and control swimming underwater exoskeletons underwater robots wearable robots

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An isometric Embedding of Mbius Band with Positive Gaussian Curvature

引用

Acta Mathematica Sinica,English Series 2004年第6期20卷 961-964页

作者： h.i xia hE Zi zhou TANG Department of Mathematical Sciences Tsinghua University College of Mathematical Sciences Beijing Normal University

The main purpose of this paper is to show that there is an isometric embedding from M?bius band to ?4 with positive Gaussian curvature.

关键词： Veronese map Gaussian curvature isometric immersion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multivariate synergy for h.ightening ionic hOF robustness and proton conductivity

引用

Science China Chemistry 2025年

作者： xiang-Tian Bai Li-h.i Cao Xu-Yong Chen Jia-Yu Wang Zi-Ye zhou Shaanxi Key Laboratory of Chemical Additives for industry College of Chemistry and Chemical EngineeringShaanxi University of Science and Technology

Multicomponent crystalline materials construct more complex and diversified structures with different combinations and modes,which expands the material structure space and application *** this work,we have successfully synthesized two twocomponent ionic hydrogen-bonded organic frameworks （ihOF-32 and ihOF-33） and a three-component ihOF （ihOF-34）.Guanidine hydrochloride which.is rich.in N and h and has a short ch.in length strengthens the hydrogen bonding network of ihOF,thereby aiding in the efficient migration of *** rigid architecture of 1,1'-diamino-4,4'-bipyridine diiodide furnishes additional scaffolding for the ihOFs and enhances its robustness under harsh ***-34 accomplishes the combination of the ultra-high proton conductivity of ihOF-32 and the robustness of ihOF-33 by the synergistic interaction among the three components of *** addition,ihOF-34 was fabricated as a composite membrane with a peak proton conductivity of 1.55×10-1S cm-1,which.is 3.8 times higher than that of recast Nafion,and has extensive potential in fuel *** self-assembly strategy of multicomponent hOFs opens up new avenues for constructing diverse structures while promising new opportunities for applications in the fields of proton conduction and energy storage.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

An integrable Decomposition of Defocusing Nonlinear Schr(o|¨)dinger Equation

引用

Communications in Theoretical Physics 2009年第8期52卷 203-205页

作者： xia Bao-Qiang zhou Ru-Guang Department of Mathematics Zhengzhou University Zhengzhou 450052 China School of Mathematical Sciences Xuzhou Normal University Xuzhou 221116 China

The method of nonlinearization of spectral problems is developed to the defocusing nonlinear Schr(o|¨)*** an application,an integrable decomposition of the defocusing nonlinear Schr(o|¨)dinger equation is presented.

关键词： nonlinearization of spectral problem defocusing nonlinear Schrodinger equation integrable hamiltonian system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of flow and heat transfer characteristics of micro-pin fin heat sink using silver nanofluids

引用

Science China(Technological Sciences) 2012年第1期55卷 155-162页

作者： zhou MingZheng xia GuoDong Ch.i Lei Li Jian zhou LiJun Key Laboratory of Enhanced heat Transfer and Energy Conservation Ministry of Education College of Environmental and Energy Engineering Beijing University of Technology Beijing 100124 China

Silver nanofluids with three different volume fractions are prepared by a one-step chemical reduction method(Ultra-sound-assisted Membrane Reaction(UAMR)).The convective heat transfer and friction characteristics of silver nanofluid in micro-pin fin heat sink are investigated *** results indicate that the pressure drops of nanofluids with different volume fractions have little *** to the base fluid(polyvinylpyrrolidone(PVP) solution),the pressure drop of nanofluids increases slightly at the same volume flow *** the flow rate is small,the increment is not *** in-troduction of surfactant increases the fluid viscosity,so the pressure drops of nanofluids are larger than those of pure water,under the same flow ***,the maximum difference is no more than 10%.The volume fraction of silver nanoparticles significantly affects the convection heat transfer coefficient of micro-pin fin heat *** presence of nanoparticles improves significantly the heat transfer ***,high viscosity of the nanofluids hinders the heat transfer strengthening effect of *** the present work,when the volume fraction of silver particles reaches to 0.012%,the thermal resistance of nanofluid gradually becomes lower than that of deionized water,which.indicates the integrated heat transfer enhancement of nanofluids.

关键词： nanofluids micro-pin fin heat transfer viscosity volume fraction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simultaneous CO2 capture and h2 generation using Fe2O3/Al2O3 and Fe2O3/CuO/Al2O3 as oxygen carriers in single packed bed reactor via chemical looping process

引用

Frontiers of Environmental Science & Engineering 2015年第6期9卷 1117-1129页

作者： Jie ZhU Wei WANG Xiuning hUA zhou xia zhou DENG School of Environment Tsinghua University Beijing 100084 China Jian Kun New Energy Technology Co. Ltd. Beijing 100085 China

The chemical looping concept provided a novel way to achieve carbon separation during the production of energy or substances. in this work, hydrogen generation with.inherent CO2 capture in single packed bed reactor via this concept was discussed. Two oxygen carriers, Fe203 60 wt.% and Fe2O3 55 wt.%/CuO 5 wt.% supported by Al2O3, were made by ball milling method. First, according to the characteristics of the reduction breakthrough curve, a strict fuel supply strategy was selected to achieve simultaneous CO2 capture and hE production. Then, in the long term tests using CO as fuel, it was proved that CuO addition improved hydrogen generation with the maximum intensity of 3700 μmol h2·g^-1 Fe2O3 compared with Fe-Al of 2300 μmol hE.g^-1 Fe2O3. The overall CO2 capture efficiency remained 98%- 98.8% over 100 cycles. Moreover, the reactivity of deactivated materials was recovered nearly like that of fresh ones by sintering treatment. Finally, two kinds of complex gases consist of CO, hE, Ch4 and CO2 were utilized as fuels to test the feasibility. The results showed all components could be completely converted by Fe-Cu- Al in the reduction stage. The intensity of hydrogen production and the overall CO2 capture efficiency were in the range of 2000-2400 μnol h2^g^-1 Fe2O3 and 89%, 95%, respectively.

关键词： CO2 capture chemical looping hydrogengeneration iron based oxygen carriers single packed bedreactor long-term test complex gases fuel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Existence of Positive Solutions for a Singular p-Laplacian Differential Equation

引用

Acta Mathematica Sinica,English Series 2008年第8期24卷 1331-1344页

作者： xia Li Zheng An YAO Wen Shu zhou Department of Mathematics Shenzhen University Shenzhen 518060 P. R. China Department of Mathematics Zhongshan University Guangzhou 510275 P. R. China Department of Mathematics Jilin University Changchun 130012 P. R. China

in this paper, we are concerned with the existence of positive solutions for a singular p-Laplacian differential equation（φp（u＇））＇＋β/r φp（u＇）-γ ｜u＇｜^p/u ＋ g（r）=0,0〈r〈1,subject to the Dirichlet boundary conditions： u（0） = u（1） =0, where φp（s） = ｜sl^P-2s,p 〉 2,β 〉0, γ〉（p-1）/p （β ＋ 1）, and g（r） ∈ C^1 [0, 1] with g（r）〉 0 for all τ ∈ [0, 1]. We use the method of elliptic regularization, by carrying out two limit processes, to get a positive solution.

关键词： p-Laplacian differential equation positive solution existence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Palladium installed copper-organic framework for C–C coupling reactions

引用

Science China Chemistry 2025年

作者： Yu-Mei Wang Mei-xia Tao Kai-Ming Mo Xu Chen Shu-hua Zhong Elena S Shubina Guo-hong Ning Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–h arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Sound velocity in dense stellar matter with strangeness and compact stars

引用

Chinese Physics C 2021年第5期45卷 237-246页

作者： Chengjun xia Zhenyu Zhu xia zhou Ang Li School of information Science and Engineering Zhejiang University Ningbo Institute of Technology.Ningbo 315100 China Department of Astronomy Xiamen UniversityXiamen 361005China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China

The phase state of dense matter in the intermediate density range(~1-10 times the nuclear saturation density)is both.intriguing and unclear and can have important observable effects in the present gravitational wave era of neutron *** matter density increases in compact stars,the sound velocity is expected to approach the con-formal limit(cs/c=1/√3)at high densities and should also fulfill the causality limit(cs/chowever,its de-tailed behavior remains a prominent topic of *** was suggested that the sound velocity of dense matter could be an important indicator of a deconfinement phase transition,where a particular shape might be expected for its density *** this work,we explore the general properties of the sound velocity and the adiabatic index of dense matter in hybrid stars as well as in neutron stars and quark *** conditions are employed for the had-ron-quark phase transition with varying interface *** find that the expected behavior of the sound velocity can also be achieved by the nonperturbative properties of the quark phase,in addition to a deconfinement phase ***,it leads to a more compact star with a similar *** then propose a new class of quark star equation of states,which can be tested by future high-precision radius measurements of pulsar-like objects.

关键词： quark matter hadron-quark phase transition neutron star

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Characterization of Graphs with No 2-connected Spanning Subgraph of V_(8)as a Minor

引用

Acta Mathematicae Applicatae Sinica 2022年第4期38卷 902-915页

作者： xiao-min zhou xia-xia GUAN Cheng-fu QiN Wei-hua YANG Department of Mathematics Taiyuan University of TechnologyTaiyuan 030000China School of Mathematical Sciences Xiamen UniversityXiamen 361005China School of Mathematics Science Guangxi Teachers Education UniversityNanning 530001China

it is difficult to characterize graphs which contain no a 2-connected graph as a minor in graph *** V_(8)be a graph constructed from an 8-cycle by connecting the antipodal *** are thirteen 2-connected spanning subgraphs of V_(8).in particular,one of them is obtained from the Petersen graph by deleting two vertices and it is also a hard problem to characterize Petersen-minor-free *** this paper,we characterize internally 4-connected graphs which contain a 2-connected spanning subgraph of V_(8)as a forbidden minor.

关键词： V_(8) internally 4-connected graph minor-free 2-connected subgraph

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：