检索结果-内蒙古大学图书馆

SSRN 2025年

作者： Wang, Di Yang, Ya Liu, Shiyi Yan, Hailong Cheng, Jinbing Lu, Yang Luo, Yongsong Yang, Hui Ying School of Physics and Electronic Engineering Xinyang Normal University Xinyang464000 China Henan International Joint Laboratory of MXene Materials Microstructure Nanyang Normal University Nanyang473061 China Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road Singapore487372 Singapore

Lithium-sulfur (Li-S) batteries are confronted with challenges such as capacity degradation and limited rate capacity, which stem from the passivation of active materials, polysulfide shuttle effect, and slow redox kinetics. To address these issues, a composite material comprising CoSe quantum dots (QDs)/NiO PCNFs (porous carbon nanofibers) built on hollow carbon nanofibers had been designed and synthesized. This advanced design maximizes the exposure of active sites, which are crucial for the anchoring and conversion of lithium polysulfides (LiPSs). The CoSe QDs/NiO PCNFs utilized the synergistic effects between the components to enhance the cyclic stability over 500 cycles with an ultra-low capacity decay rate of 0.034 % per cycle at a current density of 2 C. The heterostructure and the built-in electric field (BIEF) work in concert to mitigated the polysulfide shuttle effect and promote faster electron and lithium-ion transport. This design offered a promising pathway to improving the energy density, power density, and cycle life of Li-S batteries, bringing them one step closer to practical and widespread application. © 2025, The Authors. All rights reserved.

关键词： Passivation

来源：评论

学校读者我要写书评

暂无评论

Tailored Lmo@Cof Composite Electrodes for Direct Electrochemical Lithium Extraction from High-Temperature Brines

SSRN

引用

SSRN 2023年

作者： Zhao, Xiaoyu Gong, Yaxin Gao, Kai Wang, Yanfei Yang, Hui Ying Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin300457 China Pillar of Engineering Product Development Singapore University of Technology and Design 487372 Singapore

A composite electrode material LiMn2O4-Pyr-2D was designed by combining the covalent organic frameworks (COFs) Pyr-2D with LiMn2O4(LMO). Pyridine(Pyr) was used to form a planar and conjugated structure, which enabled the formation of ordered and stable molecular building blocks with regular pores and uniform element distribution. The structure is reduced the rate of Mn dissolution and Jahn-Teller effect-induced structural collapse of LMO under high temperatures, significantly improving the high-temperature resistance and lithium extraction efficiency of LiMn2O4 in geothermal brine. Furthermore, the fast ion diffusion rate at high temperatures was utilized to improve the lithium extraction efficiency. The results show that LiMn2O4-Pyr-2D achieved an initial discharge capacity of 154.00 mAh/g in a LiCl solution at 60 ℃, and a capacity retention rate of 93.32% after 15 cycles of lithium extraction in geothermal water from Tibet at 60 ℃. The unit energy consumption was 0.46 Wh/mol with an extraction capacity was 47.03 mmol/g. This approach opens a new way for electrochemical lithium extraction from high-temperature brine with high efficiency. © 2023, The Authors. All rights reserved.

关键词： Lithium compounds

来源：评论

学校读者我要写书评

暂无评论

Comprehensive Evaluation of Clinical Antimicrobial Resistance Using Impedance-Accelerated Single-Bacterium Multiplex Screening Strategy

SSRN

引用

SSRN 2024年

作者： Chang, Yifu Zhong, Jianwei Kassim, Asyraaf Khair Bin Koo, Seok Hwee Tan, Thean Yen Zhou, Yinning Ai, Ye Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa999078 China Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road Singapore487372 Singapore Research Laboratory Changi General Hospital Singapore529889 Singapore Department of Laboratory Medicine Changi General Hospital Singapore529889 Singapore

Rapid detection of bacterial antibiotic resistance is paramount in clinical settings to enable timely and effective therapeutic interventions. Traditional approaches such as disc diffusion and broth dilution are indeed dependable, however, they suffer from a notable drawback of long assay durations. This is attributed to the inherent delay caused by bacteria's macroscopic growth rate, which often necessitates measurement periods exceeding 20 hours, a timeframe incompatible with the clinical urgency. In this study, we demonstrate a comprehensive strategy on rapid bacterial antimicrobial resistance profiling and testing in clinical samples via a label-free impedance-accelerated single-bacterium screening. This system involves one newly developed parameter that is calculated from the two-dimensional kernel density values of different density regions in bacterial impedance spectra. By evaluating the changes in bacterial populations over a certain period using this new parameter, antimicrobial resistance of individual strains of bacteria can be determined within 20-minute antibiotics exposure. This high-throughput method rapidly and accurately determines the resistance profiles of five clinical Enterobacteriaceae strains against six antibiotic types. During the analysis of the impedance spectrum, we have also observed that antibiotics with different antimicrobial mechanisms have distinct effects on the bacterial impedance profile. This proposed method demonstrates excellent accuracy and rapid response time, providing a novel and practical strategy for next-generation antimicrobial susceptibility testing (AST) and antibiotic management. © 2024, The Authors. All rights reserved.

关键词： Bacteria

来源：评论

学校读者我要写书评

暂无评论

Defect and Doping Co‑Engineered Non‑Metal Nanocarbon ORR Electrocatalyst

引用

Nano-Micro Letters 2021年第4期13卷 178-207页

作者： Jian Zhang Jingjing Zhang Feng He Yijun Chen Jiawei Zhu Deli Wang Shichun Mu Hui Ying Yang Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Pillar of Engineering Product Development Singapore University of Technology and Design8 Somapah RoadSingapore 487372Singapore State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200People’s Republic of China

Exploring low-cost and earth-abundant oxygen reduction reaction(ORR)electrocatalyst is essential for fuel cells and metal–air *** them,non-metal nanocarbon with multiple advantages of low cost,abundance,high conductivity,good durability,and competitive activity has attracted intense interest in recent *** enhanced ORR activities of the nanocarbons are normally thought to originate from heteroatom(e.g.,N,B,P,or S)doping or various induced ***,in practice,carbon-based materials usually contain both dopants and *** this regard,in terms of the co-engineering of heteroatom doping and defect inducing,we present an overview of recent advances in developing non-metal carbon-based electrocatalysts for the *** characteristics,ORR performance,and the related mechanism of these functionalized nanocarbons by heteroatom doping,defect inducing,and in particular their synergistic promotion effect are emphatically analyzed and ***,the current issues and perspectives in developing carbon-based electrocatalysts from both of heteroatom doping and defect engineering are *** review will be beneficial for the rational design and manufacturing of highly efficient carbon-based materials for electrocatalysis.

关键词： Defect Doping Electrocatalyst Oxygen reduction reaction Non-metal nanocarbon

来源：评论

学校读者我要写书评

暂无评论

Arbitrary Engineering of Spatial Caustics with 3D-printed Metasurfaces

arXiv

引用

arXiv 2023年

作者： Zhou, Xiaoyan Wang, Hongtao Liu, Shuxi Wang, Hao En Chan, John You Pan, Cheng-Feng Zhao, Daomu Yang, Joel K.W. Qiu, Cheng-Wei Zhejiang Province Key Laboratory of Quantum Technology and Device School of Physics Zhejiang University Hangzhou310058 China Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore Engineering Product Development Singapore University of Technology and Design Singapore487372 Singapore

Caustics occur in diverse physical systems, spanning the nano-scale in electron microscopy to astronomical-scale in gravitational lensing. As envelopes of rays, optical caustics result in sharp edges or extended networks. Caustics in structured light, characterized by complex-amplitude distributions, have innovated numerous applications including particle manipulation, high-resolution imaging techniques, and optical communication. However, these applications have encountered limitations due to a major challenge in engineering caustic fields with customizable propagation trajectories and in-plane intensity profiles. Here, we introduce the "compensation phase" via 3D-printed metasurfaces to shape caustic fields with curved trajectories in free space. The in-plane caustic patterns can be preserved or morphed from one structure to another during propagation. Large-scale fabrication of these metasurfaces is enabled by the fast-prototyping and cost-effective two-photon polymerization lithography. Our optical elements with the ultra-thin profile and sub-millimeter extension offer a compact solution to generating caustic structured light for beam shaping, high-resolution microscopy, and light-matter-interaction studies. Copyright © 2023, The Authors. All rights reserved.

关键词： Optical communication

来源：评论

学校读者我要写书评

暂无评论

Surface active-site engineering in hierarchical PtNi nanocatalysts for efficient triiodide reduction reaction

引用

Nano Research 2021年第12期14卷 4714-4718页

作者： Jiabin Cui Pin Ma Weidan Li Rui Jiang Lirong Zheng Yuan Lin Chang Guo Xiong Yin Leyu Wang State Key Laboratory of Chemical Resource Engineering Innovation Centre for Soft Matter Science and EngineeringCollege of ChemistryBeijing University of Chemical TechnologyBeijing100029China Beijing National Laboratory for Molecular Sciences Key Laboratory of PhotochemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Pillar of Engineering Product Development Singapore University of Technology and DesignSingapore487372Singapore

Hierarchical Pt-alloys enriched with active sites are highly desirable for efficient catalysis,but their syntheses generally need time-consuming and elaborate annealing treatment at high *** herein report a surface active-site engineering strategy for constructing the hierarchical PtNi nanocatalysts with an atomic Pt-skin layer(PtNi@Pt-SL)towards efficient triiodide reduction reaction(TRR)via an acid-dealloying *** facile acid-dealloying process promotes the formation of surface Pt active sites on the hierarchical Pt-alloys,and thus results in good catalytic performance towards *** calculation reveals that the enhanced catalytic property stems from the moderate energy barriers for iodide atoms on the surface Pt *** surface active-site engineering strategy paves a new way for the design of active and durable electrocatalysts.

关键词： surface active-site engineering Pt skin-layer hierarchical structure dealloying triiodide reduction reaction

来源：评论

学校读者我要写书评

暂无评论

Simplifying Robot Grasping in Manufacturing with a Teaching Approach based on a Novel User Grasp Metric

引用

Procedia Computer Science 2024年 232卷 1961-1971页

作者： Matteo Pantano Vladislav Klass Qiaoyue Yang Akhil Sathuluri Daniel Regulin Lucas Janisch Markus Zimmermann Dongheui Lee Technology Department Siemens Aktiengesellschaft D-81739 Munich Germany Human-Centered Assistive Robotics Technical University of Munich D-80333 Munich Germany Laboratory for Product Development and Lightweight Design Technical University of Munich D-85748 Garching Germany Autonomous Systems Technische Universität Wien AT-1040 Vienna Austria Institute of Robotics and Mechatronics German Aerospace Center D-82234 Wessling Germany

The manufacturing industry is undergoing rapid evolution, necessitating flexible and adaptable robots. However, configuring such machines requires technical experts, which are hard to find, especially for small and medium enterprises. Therefore, the process needs to be simplified by allowing non-experts to configure robots. During such configuration, one key aspect is the definition of objects’ grasping poses. The literature proposes deep learning techniques to compute grasping poses automatically and facilitate the process. Nevertheless, practical implementation for inexperienced factory operators can be challenging, especially if task-specific knowledge and constraints should be considered. To overcome this barrier, we propose an approach that facilitates teaching such poses. Our method, employing a novel user grasp metric, combines the operator's initial grasp guess given by a 3D spatial device with a state-of-the-art deep learning algorithm, thus returning reliable grasping poses but simultaneously close to the operator's initial guess. We compare this approach against commercial grasping pose definition interfaces through a user test involving 28 participants and against state-of-the-art deep learning grasp estimators. The results demonstrate a significant improvement in system usability (+24%) and a reduced workload (-16%). Furthermore, our experiments reveal an increased grasp success rate when utilizing the user grasp metric, surpassing state-of-the-art deep learning grasping estimators.

关键词： operator empowerment spatial interaction robotic grasping usability small medium enterprises cobots

来源：评论

学校读者我要写书评

暂无评论

Synergistic Effects of Kinetics and Lyophilicity Stimulated by Mg2+/Li+ Co-Insertion in Bi2-XsbXs2 Toward Reversible Hybrid Batteries

SSRN

引用

SSRN 2024年

作者： Du, Yibo Wang, Zhitao Ma, Heping Si, Wenhui Wang, Wenlong Zhang, Wenming Yang, Hui Ying Chen, Song Hebei Key Laboratory of Optic-Electronic Information and Materials National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices College of Physics Science and Technology Hebei University Baoding071002 China Henan Engineering Research Center of Design and Recycle for Advanced Electrochemical Energy Storage Material School of Materials Science and Engineering Henan Normal University Xinxiang453007 China Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road 487372 Singapore Singapore

Co-intercalation type hybrid magnesium-lithium-ion batteries (MLIBs) have received widespread attention in recent years for higher electrolyte utilization and conspicuous insertion kinetics. However, the co-intercalation strategy is rarely explored in replaceable anode host structures. We propose a cation exchange strategy to optimize metal sulfide, endowing MLIBs with high specific capacity, prominent cycle stability and rate performance. Kinetics analyses combined with density functional theory (DFT) calculations demonstrate the preferential absorption of Mg2+/Li+ in Bi-Sb sites and fast migration kinetics induced by Mg2+/Li+ co-insertion. COMSOL Multiphysics simulations further prove the prominent lyophilic effect of the bimetallic sulfide in facilitate ion diffusion. In addition, the multi-step reaction mechanisms and structural evolutions are profoundly revealed by a series of ex-situ investigations. Our findings provide inspirations on exploring novel electrode materials with outstanding electrochemical performance toward large-scale energy storage applications. © 2024, The Authors. All rights reserved.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

A matrix-based blueprint for system architecture design a case study with an industrial partner 22

A matrix-based blueprint for system architecture design a ca...

引用

22nd International Dependency and Structure Modeling Conference, DSM 2020

作者： Lender, Benjamin Trauer, Jakob Schweigert-Recksiek, Sebastian Spreitzer, Karsten Chmielewski, Nils Zimmermann, Markus Laboratory for Machine Tools and Production Engineering Wzl of the Rwth Aachen University Laboratory for Product Development and Lightweight Design Technical University of Munich Germany Viessmann Werke Allendorf GmbH

ISBN: (纸本)9781912254125

Trends like digitalization, servitization and the ongoing globalization drive an ever more growing product complexity. To handle this challenge and to succeed on fast-paced markets, companies need to constantly model, organize, and improve their system architectures. This paper combines different approaches from the literature with specific needs of the industry partner. An overview of definitions and processes found in literature is the basis for deriving a generic framework that enables companies to implement a system architecture design process that builds the basis for further actions like risk management or the introduction of platform strategies. The main part of the framework is a guideline on how to ensure a comprehensive system architecture regardless of the amount of resources spent on the process. The framework is applied to different use cases of the industry partner at varying levels of complexity. Copyright © Proceedings of the 22nd Inter. Dep. and Structure Modeling Conf., DSM 2020.

关键词： Risk management

来源：评论

学校读者我要写书评

暂无评论

Reconfigurable intelligent surfaces for wireless communications:Overview of hardware designs,channel models,and estimation techniques

引用

Intelligent and Converged Networks 2022年第1期3卷 1-32页

作者： Mengnan Jian George C.Alexandropoulos Ertugrul Basar Chongwen Huang Ruiqi Liu Yuanwei Liu Chau Yuen the Wireless Research Institute ZTE CorporationBeijing 100029China the State Key Laboratory of Mobile Network and Mobile Multimedia Technology Shenzhen 518055China Department of Informatics and Telecommunications National and Kapodistrian University of AthensAthens 15784Greece Communications Research and Innovation Laboratory(CoreLab) Department of Electrical and Electronics EngineeringKoçUniversityIstanbul 34450Turkey College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China School of Electronic Engineering and Computer Science Queen Mary University of LondonLondonE14NSUK. the Engineering Product Development(EPD)Pillar Singapore University of Technology and DesignSingapore 487372Singapore

The demanding objectives for the future sixth generation(6G)of wireless communication networks have spurred recent research efforts on novel materials and radio-frequency front-end architectures for wireless connectivity,as well as revolutionary communication and computing *** the pioneering candidate technologies for 6G belong the reconfigurable intelligent surfaces(RISs),which are artificial planar structures with integrated electronic circuits that can be programmed to manipulate the incoming electromagnetic field in a wide variety of *** RISs in wireless networks have been recently advocated as a revolutionary means to transform any wireless signal propagation environment to a dynamically programmable one,intended for various networking objectives,such as coverage extension and capacity boosting,spatiotemporal focusing with benefits in energy efficiency and secrecy,and low electromagnetic field *** by the recent increasing interests in the field of RISs and the consequent pioneering concept of the RIS-enabled smart wireless environments,in this paper,we overview and taxonomize the latest advances in RIS hardware architectures as well as the most recent developments in the modeling of RIS unit elements and RIS-empowered wireless signal *** also present a thorough overview of the channel estimation approaches for RIS-empowered communications systems,which constitute a prerequisite step for the optimized incorporation of RISs in future wireless ***,we discuss the relevance of the RIS technology in the latest wireless communication standards,and highlight the current and future standardization activities for the RIS technology and the consequent RIS-empowered wireless networking approaches.

关键词： reconfigurable intelligent surfaces beyond 5G 6G channel modeling hardware architecture channel estimation smart wireless environment standardization

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：