检索结果-南通市图书馆

Ultra-homogeneous dense Ag nano layer enables long lifespan solid-state lithium metal batteries

Journal of Energy Chemistry 2024年第9期96卷 110-119页

作者： Yaning Liu Tianqi Yang Ruyi Fang Chengwei Lu Ruojian Ma Ke Yue Zhen Xiao xiaozheng zhou Wenkui Zhang Xinping He Yongping Gan Jun Zhang Xinhui Xia Hui Huang Xinyong Tao Yang Xia College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesChina Jiliang UniversityHangzhou 310018ZhejiangChina

The unstable electrolyte/lithium(Li)anode interface has been one of the key challenges in realizing high energy density solid-state lithium metal batteries(LMBs)***,a dense and uniform silver(Ag)nano interlayer with a thickness of∼35 nm is designed accurately by magnetron sputtering technology to optimize the electrolyte/Li anode *** Ag nano layer reacts with Li metal anode to in-situ form Li-Ag alloy,thus enhancing the physical interfacial contact,and further improving the interfacial wettability and *** particular,the Li-Ag alloy is inclined to form AgLi phase proved by cryo-TEM and DFT,effectively preventing SN from continuously“attacking”the Li metal anode due to the lower adsorption of succinonitrile(SN)molecules on AgLi than that of pure Li metal,thereby significantly reinforcing the interfacial ***,the enhanced physical and chemical stability of electrolyte/Li anode interface promotes the homogeneous deposition of Li^(+)and inhibits the dendrite *** Li-symmetric cell maintains stable operation for up to 1700 h and the cycling stability of LiFePO_(4)|SPE|Li full cell is remarkably improved at room temperature(capacity retention rate of 91.9%for 200 cycles).This work opens an effective way for accurate and controllable interface design of long lifespan solid-state LMBs.

关键词： Silvernano layer Poly(ethylene oxide) Solid polymer electrolyte Succinonitrile Lithium metal battery

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***的检索特色

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图书情报工作 2005年第9期49卷 136-139页

作者：周晓政南京医科大学图书馆南京210029

从收录范围、检索途径、标引深度和循证医学资料收集等方面,对*** 4.0(荷兰《医学文摘》Web版)和PubMed进行对比分析。指出*** 4.0对于检索药学和神经精神卫生文献具有一定优势,是医药学证据来源的必备检索工具。

关键词：荷兰《医学文摘》Web版检索特色证据检索

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亚洲体坛开始联合行动共襄武术进奥运(英文)

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中国体育（中英文版） 2002年第11期 -页

作者： zhou xiaozheng

The Olympic Council of Asia (OCA), Asia's top sportsgoverning body, and all its members will support wushu, or theChinese martial arts, to become an official event at the 2008Beijing Olympics, OCA President Sheikh Ahmad AI-Fahad Al-Sabah said on September 27 in the South Korean city of Busan."I think all Asia will go together to support wushu to be partof the Olympic Games," said Al-Sabah, who flew in Busan forthe 14th Asian Games which began on September 29 and endedon October 14.

关键词：联合行动

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High performance receiving and processing technology in satellite beam hopping communication

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Journal of Systems Engineering and Electronics 2024年第4期35卷 815-828页

作者： ZHAI Shenghua HUI Tengfei GONG Xianfeng ZHANG Zehui GAO xiaozheng YANG Kai School of Communication Engineering Xi’Dian UniversityXian 710126China CAST(China Academy of Space Technology)-Xi’an Institute of Space Radio Technology Xi’an 710010China School of Cyberspace Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

Beam-hopping technology has become one of the major research hotspots for satellite communication in order to enhance their communication capacity and ***,beam hopping causes the traditional continuous time-division multiplexing signal in the forward downlink to become a burst signal,satellite terminal receivers need to solve multiple key issues such as burst signal rapid synchronization and high-per-formance ***,this paper analyzes the key issues of burst communication for traffic signals in beam hopping sys-tems,and then compares and studies typical carrier synchro-nization algorithms for burst ***,combining the requirements of beam-hopping communication systems for effi-cient burst and low signal-to-noise ratio reception of downlink signals in forward links,a decoding assisted bidirectional vari-able parameter iterative carrier synchronization technique is pro-posed,which introduces the idea of iterative processing into car-rier *** at the technical characteristics of communication signal carrier synchronization,a new technical approach of bidirectional variable parameter iteration is adopted,breaking through the traditional understanding that loop struc-tures cannot adapt to low signal-to-noise ratio burst ***,combining the DVB-S2X standard physical layer frame format used in high throughput satellite communication systems,the research and performance simulation are *** results show that the new technology proposed in this paper can significantly shorten the carrier synchronization time of burst signals,achieve fast synchronization of low signal-to-noise ratio burst signals,and have the unique advantage of flexible and adjustable parameters.

关键词： beam-hopping high throughput satellite high per-formance reception processing

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Polyoxometalate-based flexible conductive materials with superionic conductivity

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Science China Chemistry 2024年第10期67卷 3299-3309页

作者： Yuxin Wang Shuping Xue Jun Geng Ying Lu Teng Li xiaozheng Duan Xue Bai Yanli Yang Jingqi Yang Shuxia Liu Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education College of ChemistryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Flexible ion-conductive materials exhibit intriguing advantages for applications in flexible electronic ***,the further enhancement of their conductivity within environmental limitations is an urgent demand for the development of flexible electronic devices,yet remains as a great ***,we report a“dual-acid”strategy,via the encapsulation of two acids,H_(3)PW_(12)O_(40)(HPW) and NH_(2)SO_(3)H(SA),with synergistic interaction into poly(vinyl alcohol)-glycerol(PVA-Gly) hydrogel,to achieve polyoxometalate(POM)-based flexible materials with superionic conductivity under various environmental *** a representative example,the prepared PVA-Gly/HPW-SA-20% hydrogel presents an ultrahigh proton conductivity ranging from -30℃(3.33×10^(-2)S cm^(-1)) to room temperature(2.78×10^(-1)S cm^(-1)) under ambient ***,the PVA-Gly/HPW-SA-20% hydrogel exhibits remarkable advantages in anti-freezing,mechanical flexibility and self-adhesiveness,making it a promising multifunctional electrolyte for flexible electronic *** experimental results and molecular dynamics(MD) simulations jointly demonstrate that SA bridges HPW clusters to form a dense proton transport pathway induced by multiple electrostatic and hydrogen bonding interactions between SA and HPW counterparts,which contributes to the high-level proton conductivity of the PVA-Gly/HPW-SA-20% *** work provides new insights into the design of POM-based flexible materials with superionic conductivity.

关键词： polyoxometalates proton conduction dual-acid effect hydrogel molecular dynamics simulation

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信息—知识—智能转换视野下图书馆信息素养教育的目标功能定位

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现代情报 2016年第1期36卷 26-29页

作者：周晓政王正兴南京医科大学图书馆江苏南京210029 淮海工学院图书馆江苏连云港222005

本文在信息—知识—智能的转换视野下研究图书馆职能、图书馆员的能力和信息素养,证明图书馆是扩展人类自身"信息和智能能力"的社会装置,图书馆员的核心能力就是信息素养,图书馆是信息素养教育主要场所,图书馆信息素养教育的功能定位是... 详细信息

本文在信息—知识—智能的转换视野下研究图书馆职能、图书馆员的能力和信息素养,证明图书馆是扩展人类自身"信息和智能能力"的社会装置,图书馆员的核心能力就是信息素养,图书馆是信息素养教育主要场所,图书馆信息素养教育的功能定位是优化学习者思维。这个目标功能定位解决了图书馆信息素养教育如何应对图书馆外部急速变化的生态环境,信息素养教育回归到图书情报学特质和图书馆员职业智能本质传承上来。

关键词：信息知识智能转换信息素养教育图书馆职能图书

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Atomically dispersed Fe sites on hierarchically porous carbon nanoplates for oxygen reduction reaction

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Journal of Energy Chemistry 2024年第3期90卷 7-15,I0002页

作者： Ruixue Zheng Qinglei Meng Hao Zhang Teng Li Di Yang Li Zhang Xiaolong Jia Changpeng Liu Jianbing Zhu xiaozheng Duan Meiling Xiao Wei Xing State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026AnhuiChina Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123JiangsuChina State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina

Developing cost-effective,robust and stable non-precious metal catalysts for oxygen reduction reaction(ORR) is of paramount importance for electrochemical energy conversion devices such as fuel cells and metal-air *** Fe-N-C single atom catalysts(SACs) have been hailed as the most promising candidate due to the optimal binding strength of ORR intermediates on the Fe-N_(4) sites,they suffer from serious mass transport limitations as microporous templates/substrates,i.e.,zeolitic imidazolate frameworks(ZIFs),are usually employed to host the active *** by this challenge,we herein develop a hydrogen-bonded organic framework(HOF)-assisted pyrolysis strategy to construct hierarchical micro/mesoporous carbon nanoplates for the deposition of atomically dispersed Fe-N_(4) *** a design is accomplished by employing HOF nanoplates assembled from 2-aminoterephthalic acid(NH_(2)-BDC) and p-phenylenediamine(PDA) as both soft templates and C,N *** from the structural merits inherited from HOF templates,the optimized catalyst(denoted as Fe-N-C SAC-950) displays outstanding ORR activity with a high half-wave potential of 0.895 V(*** hydrogen electrode(RHE)) and a small overpotential of 356 mV at 10 mA cm^(-2) for the oxygen evolution reaction(OER).More excitingly,its application potential is further verified by delivering superb rechargeability and cycling stability with a nearly unfading charge-discharge gap of 0.72 V after 160 *** dynamics(MD) simulations reveal that micro/mesoporous structure is conducive to the rapid mass transfer of O_(2),thus enhancing the ORR *** situ Raman results further indicate that the conversion of O_(2) to~*O_(2)-the rate-determining step(RDS) for Fe-N-C *** work will provide a versatile strategy to construct single atom catalysts with desirable catalytic properties.

关键词： Fe single atom catalysts Oxygen reduction reaction Mesoporous structure Active sites Zinc-air battery

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人口素质是我国人口问题的关键

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科技导报 1989年第4期 17-19页

作者：周孝正中国人民大学社会学研究所研究人员

中国大陆人口在今年4月已达11亿。根据我国最近进行的一次生育节育抽样调查结果(出生率23.29‰,死亡率7.23‰,自然增长率16.06‰)进行简单外推,中国大陆人口1994年将超过12亿,1999年将超过13亿,到2000年将达13.3亿。中国人口数量急剧增... 详细信息

中国大陆人口在今年4月已达11亿。根据我国最近进行的一次生育节育抽样调查结果(出生率23.29‰,死亡率7.23‰,自然增长率16.06‰)进行简单外推,中国大陆人口1994年将超过12亿,1999年将超过13亿,到2000年将达13.3亿。中国人口数量急剧增长,形势十分严峻。但从某种意义上讲,数量增长还不是最关键的。以从黑龙江省爱辉县到云南省腾冲县的直线为界,东南部和西北部人口密度有很大差异。东南部面积占全国面积的42.9%,而人口占全国人口的94.4%,人口密度为每平方公里252人。日本全国人口密度是每平方公里325人。我国台湾省的人口密度是每平方公里559人。由此可见,和日本及“亚洲四小龙”相比人口数量还不是我国人口问题的关键。隐藏在数量背后的更为关键的是人口素质问题。

关键词：人口素质人口数量爱辉县云南省腾冲县总和生育率 “亚洲四小龙” 抽样调查结果人口质量人口政策人口再生产

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Parallel Physics-Informed Neural Networks Method with Regularization Strategies for the Forward-Inverse Problems of the Variable Coefficient Modified KdV Equation

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Journal of Systems Science & Complexity 2024年第2期37卷 511-544页

作者： zhou Huijuan School of Science Shanghai Maritime UniversityShanghai 201306China

This paper mainly introduces the parallel physics-informed neural networks(PPINNs)method with regularization strategies to solve the data-driven forward-inverse problems of the variable coefficient modified Korteweg-de Vries(VC-MKdV)*** the forward problem of the VC-MKdV equation,the authors use the traditional PINN method to obtain satisfactory data-driven soliton solutions and provide a detailed analysis of the impact of network width and depth on solving accuracy and ***,the author finds that the traditional PINN method outperforms the one with locally adaptive activation functions in solving the data-driven forward problems of the VC-MKdV *** for the data-driven inverse problem of the VC-MKdV equation,the author introduces a parallel neural networks to separately train the solution function and coefficient function,successfully addressing the function discovery problem of the VC-MKdV *** further enhance the network’s generalization ability and noise robustness,the author incorporates two regularization strategies into the *** amount of numerical experimental data in this paper demonstrates that the PPINNs method can effectively address the function discovery problem of the VC-MKdV equation,and the inclusion of appropriate regularization strategies in the PPINNs can improves its performance.

关键词： Data-driven forward-inverse problems parallel physics-informed neural networks regularization strategies variable coefficient modified KdV equation

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Synchronization control of stochastically coupled neural networks with mixed time-delays

Synchronization control of stochastically coupled neural net...

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2009中国控制与决策会议

作者： xiaozheng Mou,Wuneng zhou~☆,Lin Pan and Qingyu Zhu College of Information Science and Technology,Donghua University,Shanghai 201620,China

＜正＞This paper is concerned with the synchronization control problem of an array of linearly stochastically coupled identical neural networks with discrete and distributed *** the discrete and distributed time-delays terms are introduced to model a more realistic dynamical behavior of systems in practice,besides the stochastic coupling *** utilizing the Lyapunov-Krasovskii functional method and linear matrix inequality（LMI） approach,several new criterions are derived to ensure the synchronization of the system studied in this ***,on the basis of the stable conditions of the error system,the estimation gains of the novel delayed feedback controller can be *** examples are provided to present the effectiveness of the theoretical results.

关键词： Synchronization Stochastic coupling Discrete and distributed time-delays Lyapunov-Krasovskii functional Global asymptotic stability

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