检索结果-南通市图书馆

Surface deco.ation of mesocarbon microbeads with multifunctional TiNbO_(4-x)@C co.ting layer as high rate and stable anode of Li-ion batteries

引用

Rare Metals 2024年第5期43卷 2053-2066页

作者： Jia-Mei Lai Zhi-Min Zou Yu Bai Yu-Tao Xing Chun-Hai Jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of TechnologyXiamen 361024China Shanghai xfh science and technology Development co. Ltd.Shanghai 200949China Fujian xfh New Energy Materials co. Ltd.Yong'an 366000China shenzhen xfh science and technology co. Ltd.Shenzhen 518071China Laboratorio de Microsco.ia Eletronica de Alta Resolucao Centro de Caracterizagao Avangada Para a Industria de Petroleo(LaMAR/CAIPE)Universidade Federal FluminenseNiteroiRJ 24210-346Brazil

Surface modification of graphite anode with electroactive matters has been proven of a more practical strategy in enhancing the performance of Li-ion batteries than exploring alternative novel anode ***,rutile TiNbO_(4-x) nanoparticles with a tunnel structure are employed as multifunctional deco.ation substances in co.bination with a carbon co.ting layer to improve the rate and cycle properties of mesocarbon microbeads(MCMBs).As co.pared to pristine MCMB,the Li^(+)diffusion co.fficients of the co.posite anodes are enhanced due to the synergistic effect of TiNbO_(4-x)@***,the overcharge and voltage polarization of the co.posite anodes at high rate are obviously minimized due to the current sharing effect of the high-potential TiNbO_(4-x).Moreover,the amorphous Li_(y)TiNbO_(4-x) co.verted from TiNbO_(4-x) in the initial lithiation process can deliver pseudocapacitive capacity to the co.posite anodes from the seco.d *** of these functions of TiNbO_(4-x)@Cco.ting layer have directly co.tributed to the improved rate and cycle performance of the MCMB/TiNbO_(4-x)@C co.posite *** one co.taining 12.0 wt%TiNbO_(4-x) exhibits a high reversible specific capacity of 118 m Ah·g^(-1)at 10C(1C=372 m A·g^(-1)),together with a high capacity retention of 90.9%after 300 cycles at 3C,which are all much superior to those of pristine MCMB.

关键词： Li-ion batteries MCMB TiNbO_(4-x)@C Surface deco.ation Rate capability

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

Current status and development of CMOS SiPM for scintillator-based radiation detectors toward all-digital sensors[Invited]

引用

Chinese Optics Letters 2024年第2期22卷 17-27页

作者： Nico.a D'Ascenzo 胡文韬劳慧华越轩张博房磊奚道明郑睿邱奥 Emanuele Antonecchia 凌怡清刘雨晴李琰俞航肖鹏谢庆国 Wuhan National Laboratory for Optoelectronics Wuhan 430074China Biomedical Engineering Department Huazhong University of Science and TechnologyWuhan 430074China RAYQUANT technology co. Ltd.Ezhou 436044China RAYSOLUTION Healthcare co. Ltd.Hefei 230000China RAYMEASURE technology co. Ltd.Suzhou 215000China RAYCAN technology co. Ltd.Suzhou 215000China co.lege of co.puter science and Software Engineering Shenzhen UniversityShenzhen 518060China

Modern scintillator-based radiation detectors require silico. photomultipliers(Si PMs)with photon detection efficiency higher than 40%at 420 nm,possibly extended to the vacuum ultraviolet(VUV)region,single-photon time resolution(SPTR)co.nt rate(DCR)co.centrations at low CMOS scales,deep-level carrier generation in shallow trench isolation fabrication,and power co.sumption,among *** advances at 350 and 110 nm CMOS nodes are benchmarked against available Si PMs obtained in CMOS and co.mercial customized *** co.cept of digital multithreshold Si PMs with a single microcell readout is finally reported,proposing a possible direction toward fully digital scintillator-based radiation detectors.

关键词： silico. photomultiplier co.plementary metal-oxide semico.ductor digital SiPM

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

Regulating the inner Helmholtz plane structure at the electrolyte-electrode interface for highly reversible aqueous Zn batteries

引用

Journal of Energy Chemistry 2024年第8期95卷 57-67,I0002页

作者： Jianghe Liu Sanlue Hu Hexin Guo Guobin Zhang Wen Liu Jianwei Zhao Shenhua Song Cuiping Han Baohua Li shenzhen Key Laboratory on Power Battery Safety and shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina shenzhen Key Laboratory of Advanced Materials School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina Faculty of Materials science and Energy Engineering/Institute of technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina shenzhen HUASUAN technology co. Ltd.Shenzhen 518055GuangdongChina

The development of aqueous Zn batteries is limited by parasitic water reactions,co.rosion,and dendrite *** address these challenges,an inner Helmholtz plane(IHP)regulation method is proposed by employing low-co.t,non-toxic maltitol as the electrolyte *** preferential adsorption behavior of maltitol can expel the water from the inner Helmholtz plane,and thus hinder the immediate co.tact between Zn metal and H_(2)***,strong interaction between maltitol and H_(2)O molecules can restrain the activity of H_(2)***,the"IHP adsorption effect"along with the low LUMO energy level of maltitol-CF_(3)SO_(3)^(-)can promote the in-situ formation of an organic-inorganic co.plex solid electrolyte interface(SEI)*** a result,the hydrogen/oxygen evolution side reaction,co.rosion,and dendrites issues are effectively suppressed,thereby leading to highly reversible and dendrite-free Zn plating/*** Zn‖I_(2)battery with hybrid electrolytes also demonstrates high electrochemical performance and ultralong cycling stability,showing a capacity retention of 75%over 20000 charge-discharge cycles at a large current density of 5 A g^(-1).In addition,the capacity of the device has almost no obvious decay over20000 cycles even at-30℃.This work offers a successful electrolyte regulation strategy via the IHP adsorption effect to design electrolytes for high-performance rechargeable Zn-ion batteries.

关键词： Inner Helmholtz plane Adsorption effect Dendrite suppression SEI layer Zn||I_(2)battery

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

Addressable structured light system using metasurface optics and an individually addressable VCSEL array

引用

Photonics Research 2024年第6期12卷 1129-1137页

作者： CHENYANG WU XUANLUN HUANG YIPENG JI TINGYU CHENG JIAXING WANG NAN CHI SHAOHUA YU co.NIE J.CHANG-HASNAIN School of Information science and technology Fudan UniversityShanghai 200433China Berxel Photonics co. Ltd.Shenzhen 518071China Peng Cheng Laboratory Shenzhen 518055China Chinese University of Hong Kong Shenzhen 518172China

Structured-light(SL)based 3D sensors have been widely used in many *** SL is the most widely deployed among all SL sensors due to its light weight,co.pact size,fast video rate,and low *** transmitter(known as the dot projector)co.sists of a randomly patterned vertical-cavity surface-emitting laser(VCSEL)array multiplicated by a diffractive optical element(DOE)with a fixed repeated *** that the separation of any two speckles is only one known and fixed number(albeit random),there are no other known scales to cal-ibrate or ***,typical SL sensors require extensive in-factory calibrations,and the depth resolution is limited to 1 mm at-60 cm *** this paper,to the best of our knowledge,we propose a novel dot projector and a new addressable SL(ASL)3D sensor by using a regularly spaced,individually addressable VCSEL array,multiplicated by a metasurface-DOE(MDOE)into a random pattern of the *** turning on or off the VCSELs in the array provides multiple known distances between neighboring speckles,which is used as a“built-in caliper”to achieve higher accuracy of *** as a precise“vernier caliper,”the addressable VCSEL array enables fine co.trol over speckle positions and high detection *** experimentally dem-onstrated that the proposed method can result in sub-hundred-micron level *** new co.cept opens new possibilities for applications such as 3D co.putation,facial reco.nition,and wearable devices.

关键词： speckle light surface

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

A Blockchain-Based Proxy Re-Encryption Scheme with co.ditional Privacy Protection and Auditability

引用

China co.munications 2024年第7期21卷 267-277页

作者： Chen Guo PengWeijun Wu Jing Fang Youxuan Ye Keke Xin Yanshuang China Mobile Information technology co. LtdBeijing 100037China China Mobile Information technology co. LtdShenzhen 518048China

With the development of Internet of Things technology,intelligent door lock devices are widely used in the field of house *** the traditional housing leasing scenario,problems of door lock information disclosure,tenant privacy disclosure and rental co.tract disputes frequently occur,and the security,fairness and auditability of the housing leasing transaction cannot be *** solve the above problems,a blockchain-based proxy re-encryption scheme with co.ditional privacy protection and auditability is *** scheme implements fine-grained access co.trol of door lock data based on attribute encryption technology with policy hiding,and uses proxy re-encryption technology to achieve auditable supervision of door lock information *** encryption technology and zero-knowledge proof technology are introduced to ensure the co.fidentiality of housing rent information and the fairness of rent *** co.struct a decentralized housing lease transaction architecture,the scheme realizes the efficient co.laboration between the door lock data ciphertext stored under the chain and the key information ciphertext on the chain based on the blockchain and InterPlanetary File ***,the security proof and co.puting performance analysis of the proposed scheme are carried *** results show that the scheme can resist the chosen plaintext attack and has low co.putational co.t.

关键词： attribute encryption blockchain homomorphic encryption house leasing proxy re-encryption zero-knowledge proof

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

High-repetition-rate and high-power efficient pico.eco.d thin-disk regenerative amplifier

引用

High Power Laser science and Engineering 2024年第2期12卷 16-23页

作者： Sizhi Xu Yubo Gao Xing Liu Yewang Chen Deqin Ouyang Junqing Zhao Minqiu Liu Xu Wu Chunyu Guo Cangtao Zhou Qitao Lue Shuangchen Ruan Key Laboratory of Advanced Optical Precision Manufacturing technology of Guangdong Higher Education Institutes Sino-German College of Intelligent ManufacturingShenzhen Technology UniversityShenzhenChina Han’s Laser technology Industry Group co. Ltd.ShenzhenChina shenzhen Key Laboratory of Laser Engineering College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina shenzhen Key Laboratory of Ultraintense Laser and Advanced Material technology College of Engineering PhysicsShenzhen Technology UniversityShenzhenChina

We present an effective approach to realize a highly efficient,high-power and chirped pulse amplification-free ultrafast ytterbium-doped yttrium aluminum garnet thin-disk regenerative amplifier pumped by a zero-phonon line 969 nm laser *** amplifier delivers an output power exceeding 154 W at a pulse repetition rate of 1 MHz with custom-designed 48 pump *** exceptional thermal management on the thin disk through high-quality bonding,efficient heat dissipation and a fully locked spectrum co.lectively co.tributes to achieving a remarkable optical-to-optical efficiency of 61%and a near-diffraction-limit beam quality with an M2 factor of *** the best of our knowledge,this represents the highest co.version efficiency reported in ultrafast thin-disk regenerative ***,the amplifier operates at room temperature and exhibits exceptional stability,with root mean square stability of less than 0.33%.This study significantly represents advances in the field of laser amplification systems,particularly in terms of efficiency and average *** advantageous co.bination of high efficiency and diffraction limitation positions the thin-disk regenerative amplifier as a promising solution for a wide range of scientific and industrial applications.

关键词： high efficiency high power pico.eco.d laser regenerative amplifier thin-disk laser

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

Multilevel carbon architecture of subnanosco.ic silico. for fast‐charging high‐energy‐density lithium‐ion batteries

引用

Carbon Energy 2024年第4期6卷 256-268页

作者： Meisheng Han Yongbiao Mu Lei Wei Lin Zeng Tianshou Zhao shenzhen Key Laboratory of Advanced Energy Storage Southern University of Science and TechnologyShenzhenChina SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhenChina Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhenChina

Silico.(Si)is widely used as a lithium‐ion‐battery anode owing to its high capacity and abundant crustal ***,large volume change upon cycling and poor co.ductivity of Si cause rapid capacity decay and poor fast‐charging capability limiting its co.mercial ***,we propose a multilevel carbon architecture with vertical graphene sheets(VGSs)grown on surfaces of subnanosco.ically and homogeneously dispersed Si–C co.posite nanospheres,which are subsequently embedded into a carbon matrix(C/VGSs@Si–C).Subnanosco.ic C in the Si–C nanospheres,VGSs,and carbon matrix form a three‐dimensional co.ductive and robust network,which significantly improves the co.ductivity and suppresses the volume expansion of Si,thereby boosting charge transport and improving electrode *** VGSs with vast exposed edges co.siderably increase the co.tact area with the carbon matrix and supply directional transport channels through the entire material,which boosts charge *** carbon matrix encapsulates VGSs@Si–C to decrease the specific surface area and increase tap density,thus yielding high first co.lombic efficiency and electrode co.paction ***,C/VGSs@Si–C delivers excellent Li‐ion storage performances under industrial electrode *** particular,the full cells show high energy densities of 603.5 Wh kg^(−1)and 1685.5 Wh L^(−1)at 0.1 C and maintain 80.7%of the energy density at 3 C.

关键词： fast charging high energy densities lithium‐ion batteries multilevel carbon architecture subnanosco.ic silico. anode

来源：

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

co.trol Strategies for Digital Twin Systems

引用

IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 170-180页

作者： Guo-Ping Liu IEEE the Center for co.trol science and technology Southern University of Science and TechnologyShenzhen 518055China

With the co.tinuous breakthrough in information technology and its integration into practical applications, industrial digital twins are expected to accelerate their development in the near future. This paper studies various co.trol strategies for digital twin systems from the viewpoint of practical *** make full use of advantages of digital twins for co.trol systems, an architecture of digital twin co.trol systems, adaptive model tracking scheme, performance prediction scheme, performance retention scheme, and fault tolerant co.trol scheme are proposed. Those schemes are detailed to deal with different issues on model tracking, performance prediction, performance retention, and fault tolerant co.trol of digital twin systems. Also, the stability of digital twin co.trol systems is analysed. The proposed schemes for digital twin co.trol systems are illustrated by examples.

关键词： Digital twin co.trol systems fault tolerant co.trol model tracking performance prediction performance retention

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

Carbon efficiency modeling and optimization of solar-powered cellular networks

引用

science China(Information sciences) 2024年第5期67卷 228-243页

作者： Yuxi ZHAO Xiaohu GE Wen YAN Tao HAN Yi ZHONG School of Electronic Information and co.munications Huazhong University of Science and Technology Huawei technology co. Ltd.

As wireless co.munication traffic experiences rapid growth, the carbon emissions caused by the co.munication industry are also on the rise. To achieve “carbon neutrality”, researchers are co.sidering the use of renewable energy sources to power cellular networks, thereby reducing carbon emissions. However, a challenge arises when using renewable energy, specifically owing to the unpredictable nature of both the energy co.sumption of the cellular network and the power generation from renewable sources. This inco.sistency results in low renewable energy utilization and reduced carbon efficiency. Herein, we co.struct a carbon efficiency model of solar-powered cellular networks using practical data from solar radiation. We propose a mechanism that alternately optimizes the performance of the renewable energy network and the cellular network. This approach is based on co.vex optimization theory and the Dinkelback algorithm, and it leads to the design of a carbon efficiency optimization algorithm. This algorithm aims to improve the carbon efficiency of cellular networks and reduce their carbon emissions. Simulation results demonstrate that our optimization scheme yields a maximum improvement of 2.56 × 108bps/g in the carbon efficiency of the cellular network as co.pared to co.ventional power allocation schemes such as the traditional water filling method and heuristic energy sharing and charge/discharge algorithms.

关键词： cellular networks renewable energy carbon efficiency co.vex optimization theory dinkelbach

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

Welding depth measurement for different mode lasers using optical co.erence tomography

引用

Chinese Optics Letters 2024年第1期22卷 41-46页

作者：谢冠明王三宏张跃强李由胡彪傅愉于起峰 Institute of Intelligent Optical Measurement and Detection Shenzhen UniversityShenzhen 518060China co.lege of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China shenzhen Sincevision technology co. Ltd.Shenzhen 518055China National Key Laboratory of Human Factors Engineering China Astronaut Research and Training CenterBeijing 100094China co.lege of Aerospace science and Engineering National University of Defense TechnologyChangsha 410073China

Optical co.erence tomography(OCT)allows a direct and precise measurement of laser welding depth by co.xially measuring the keyhole depth and can be used for process monitoring and *** OCT measurement was taken during single-beam laser welding,the keyhole instability of aluminum welding resulted in highly scattered OCT data and co.plicated the welding depth extraction *** a co.bination of an inner co.e beam and an outer ring beam,a novel adjustable ring mode(ARM)laser for producing a stable keyhole was applied to the OCT *** ARM laser power arrangements were co.ducted on aluminum and *** results indicated that the ring beam greatly improved the stability of the co.e beam-induced keyhole,and smooth welding depth can be extracted from the co.centrated OCT data.

关键词： optical co.erence tomography adjustable ring mode laser laser welding welding depth

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：