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Electrical control of excitonic oscillator strength and spatial distribution in a monolayer semiconductor

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Nano Research 2024年第9期17卷 8424-8430页

作者： Yanming Wang Junrong Zhang Tianhua ren Meng Xia long Fang Xiangyi Wang Xingwang Zhang Kai Zhang Junyong Wang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacao 999078China College of New Energy Inner Mongolia University of TechnologyHohhot 010051China

Electrical modulation of luminescence is significant to modern light-emitting *** transition metal dichalcogenides are emerging direct-bandgap luminescent materials with unique excitonic properties,and the multiple exciton complexes provide new opportunities to modulate the property of luminescence in atomically thin ***,we report an electrical control of exciton emission in the oscillator strength and spatial distribution of excitons in a monolayer *** modulation of excitonic emission intensity with a degree of modulation of~92%has been demonstrated by an electric field at room *** spatial carrier redistribution tuned by a lateral electric field results in distinct excitonic emission patterns by *** modulation approach to exciton oscillator strength and distribution provides an efficient way to investigate the exciton diffusion dynamics and to construct electrically tunable optoelectronic devices.

关键词： monolayer semiconductor exciton electrical modulation spatial distribution

Enhancing hourly heat demand prediction through artificial neural networks:A national level case study

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Energy and AI 2024年第1期15卷 288-299页

作者： Meng Zhang Michael-Allan Millar Si Chen Yaxing ren Zhibin yu James yu James Watt School of Engineering University of GlasgowGlasgowG128QQUK University of Lincoln Brayford PoolLincolnLN67TSUK Scottish Power GlasgowG28DQUK

Meeting the goal of zero emissions in the energy sector by 2050 requires accurate prediction of energy consumption,which is increasingly ***,conventional bottom-up model-based heat demand forecasting methods are not suitable for large-scale,high-resolution,and fast forecasting due to their complexity and the difficulty in obtaining model *** paper presents an artificial neural network(ANN)model to predict hourly heat demand on a national level,which replaces the traditional bottom-up model based on extensive building simulations and *** ANN model significantly reduces prediction time and complexity by reducing the number of model input types through feature selection,making the model more realistic by removing non-essential *** improved model can be trained using fewer meteorological data types and insufficient data,while accurately forecasting the hourly heat demand throughout the year within an acceptable error *** model provides a framework to obtain accurate heat demand predictions for large-scale areas,which can be used as a reference for stakeholders,especially policymakers,to make informed decisions.

关键词： Heating demand in buildings National level forecast Feature selection Machine learning Artificial neural network

Recent progress in bio-inspired macrostructure array materials with special wettability—from surface engineering to functional applications

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International Journal of Extreme Manufacturing 2024年第1期6卷 208-256页

作者： Zhongxu Lian Jianhui Zhou Wanfei ren Faze Chen Jinkai Xu Yanling Tian Huadong yu School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130022People’s Republic of China Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing Changchun University of Science and TechnologyChangchun 130022People’s Republic of China College of Mechanical and Electrical Engineering Changchun University of Science and TechnologyChangchun 130022People’s Republic of China School of Mechanical Engineering Tianjin UniversityTianjin 300350People’s Republic of China School of Engineering University of WarwickCoventry CV47ALUnited Kingdom

Bio-inspired macrostructure array(MAA,size:submillimeter to millimeter scale)materials with special wettability(MAAMs-SW)have attracted significant research attention due to their outstanding performance in many applications,including oil repellency,liquid/droplet manipulation,anti-icing,heat transfer,water collection,and oil–water *** this review,we focus on recent developments in the theory,design,fabrication,and application of bio-inspired *** first review the history of the basic theory of special wettability and discuss representative structures and corresponding functions of some biological surfaces,thus setting the stage for the design and fabrication of bio-inspired *** then summarize the fabrication methods of special wetting MAAs in terms of three categories:additive manufacturing,subtractive manufacturing,and formative manufacturing,as well as their diverse functional applications,providing insights into the development of these ***,the challenges and directions of future research on bio-inspired MAAMs-SW are briefy *** efforts,progress,and breakthroughs from surface engineering to functional applications elaborated herein will promote the practical application of bio-inspired MAAMs-SW.

关键词： macrostructure arrays superhydrophobic 3D printing laser droplet manipulation

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创业支撑体系建设的实证分析

重庆大学学报（自然科学版） 2006年第9期29卷 156-161页

作者：曹阳任玉珑重庆大学经济与工商管理学院重庆400030

创业的支撑体系建设是国家和区域创新系统的重要组成部分,目前从宏观层面特别是政府角度的研究比较多,从创业企业的视角进行的研究比较少.中国大学科技园是企业创业的摇篮,企业样本足够丰富,创业过程具有代表性.文中结合国内外的相关理... 详细信息

创业的支撑体系建设是国家和区域创新系统的重要组成部分,目前从宏观层面特别是政府角度的研究比较多,从创业企业的视角进行的研究比较少.中国大学科技园是企业创业的摇篮,企业样本足够丰富,创业过程具有代表性.文中结合国内外的相关理论研究,从创业企业的角度,使用重庆大学科技园区企业的问卷调查数据,运用实证分析的方法,对创业企业的需求情况进行了研究,并针对不同规模、不同发展阶段的创业企业需求进行了比较分析,从而有针对性的提出创业支撑体系建设的对策和建议.

关键词：创业支撑体系大学科技园实证研究

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发电侧电力市场中多主体动态博弈仿真研究

系统工程学报 2008年第5期23卷 563-569页

作者：刘贞任玉珑重庆大学经济与工商管理学院重庆400030

外购电比率,政府税收,舍约电量比率及市场规模等是影响发电市场均衡的主要因素.分析这些因素由于涉及到多种主体之间交互作用而显得复杂.在复杂适应系统理论的基础上,提出一种基于 Swarm 架构的发电市场多主体动态博弈仿真模型.该模型... 详细信息

外购电比率,政府税收,舍约电量比率及市场规模等是影响发电市场均衡的主要因素.分析这些因素由于涉及到多种主体之间交互作用而显得复杂.在复杂适应系统理论的基础上,提出一种基于 Swarm 架构的发电市场多主体动态博弈仿真模型.该模型可以对真实发电市场环境进行仿真,并对影响发电市场均衡的主要因素进行定量分析.仿真方法及结果为解决电力市场化改革中出现的问题提供了可供借鉴的方法和数据.

关键词：发电市场合约电量市场规模 Swarm仿真

Visceral adipose tissue predicts severity and prognosis of acute pancreatitis in obese patients

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Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 458-462页

作者： yuan Tian Qing Huang yu-Tang ren Xuan Jiang Bo Jiang Department of Gastroenterology Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

Acute pancreatitis is a common systemic inflammatory disease, manifested by a spectrum of severity, ranging from mild in the majority of patients to severe acute pancreatitis. Patients with severe acute pancreatitis suffer from severe local and systemic complications and organ failure, leading to a poor prognosis. The early recognition of the severe condition is important to improve prognosis. Obesity has risen in tandem with an increase in the severity of acute pancreatitis in recent years. Studies have revealed that adipose tissue, particularly visceral adipose tissue is associated with the prognosis of acute pancreatitis. This review discussed the role of visceral adipose tissue in obese patients with acute pancreatitis and explored the possible mechanism involved.

关键词： Visceral adipose tissue Obesity Acute pancreatitis

A nitroreductase-responsive nanoprobe with homogeneous composition and high loading for preoperative non-invasive tumor imaging and intraoperative guidance

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Chinese Chemical Letters 2024年第7期35卷 313-318页

作者： Jingqi Xin Shupeng Han Meichen Zheng Chenfeng Xu Zhongxi Huang Bin Wang Changmin yu Feifei An yu ren Institute of Medical Engineering Department of BiophysicsSchool of Basic Medical ScienceHealth Science CenterXi'an Jiaotong UniversityXi'an 710061China School of Public Health Health Science CenterXi'an Jiaotong UniversityXi'an 710061China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211816China Department of Breast Surgery the First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061China

Tumor microenvironment(TME)-activatable probes have been proven to effectively increase signal-tobackground ratios(SBRs)and improve the success rate of complete tumor ***,many fluorescence probes have to be loaded into a nanocarrier for tumor targeted delivery,which consequently encounters poor drug loading,heterogeneous composition and non-encapsulated drug aggregates occurred during nanoformulation ***,a nitroreductase(NTR)-activated“OFF-ON”near-infrared fluorescence nanoprobe,named Nano Bodipy,was synthesized by the spontaneous self-assembling of NTRresponsive dye-polyethylene glycol(PEG)amphiphilic polymer in *** NTR-responsive dye acted as the hydrophobic segment in the amphiphilic polymer,yielding a homogeneous composition and a high loading of 12.2 wt%(according to calculation)in the synthesized Nano *** synthesized Nano Bodipy can efficiently accumulate in tumors via the enhanced permeability and retention(EPR)effect,enabling non-invasive tumor-targeted fluorescence imaging and guiding complete tumor *** the synthesized Nano Bodipy entered the tumor cells,they dissociated and were activated by overexpressed *** the real-time fluorescence guide of Nano Bodipy,complete tumor resection surgery was performed successfully.

关键词： Nitroreductase Tumor diagnosis Intraoperative guidance Self-assembly Nanoprobe

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发电商垄断市场行为的仿真分析

电网技术 2008年第1期32卷 61-66页

作者：刘贞任玉珑重庆大学经济与工商管理学院重庆市沙坪坝区400030

基于地理位置和电网运输成本约束条件提出一个基于多主体的发电商动态演化博弈仿真模型。该模型假定在一个二维平面中均匀分布多个相互分割的市场,在资源较丰富地区分布着发电商,发电商可以在不同市场中分别进行产量和价格决策,以使其... 详细信息

基于地理位置和电网运输成本约束条件提出一个基于多主体的发电商动态演化博弈仿真模型。该模型假定在一个二维平面中均匀分布多个相互分割的市场,在资源较丰富地区分布着发电商,发电商可以在不同市场中分别进行产量和价格决策,以使其总体利润最大化。通过仿真分析得出以下结论:电力市场中电网运输成本使发电商存在一个明显的垄断边界交叉区域,该区域随电网运输成本的降低而不断扩大。从发电商的自然特性来讲,增加发电商的规模可以在一定程度上缓解电力紧张的局面。但由于输电成本的存在,该措施并不能从根本上解决发电商在电力市场中的垄断市场力。

关键词：垄断市场市场规模市场力动态博弈演化博弈电力市场

Surface engineering on MnO_(2)nanorods by La single atoms to accelerate oxygen reduction kinetics

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Rare Metals 2024年第9期43卷 4302-4311页

作者： Zhang-long He Liu-Qi Wang Min Jiang Jia-Nan Xie Shan Liu Jin-Can ren Rui Sun Wen-Bin Lv Wei-Bin Guo yu-Ling Liu Bing Li Qi Liu Hao He School of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410000China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics City University of Hong KongHong Kong 999077China

Surface engineering,which modulates the electronic structure and adsorption/desorption properties of electrocatalysts,is one of the key strategies for improving the catalytic ***,we demonstrate a facile solid-phase reaction for surface engineering of MnO_(2)to boost the oxygen reduction *** reaction with surface hydroxy groups,La single atoms with loading amount up to 2.7 wt%are anchored onto a-MnO_(2)*** surface engineering,the oxygen reduction reaction(ORR)kinetics is significantly improved with the half-wave potential from 0.70 to 0.84 V,the number of transferred electrons from 2.5 to 3.9 and the limiting current density from 4.8 to 6.0 mA·cm^(-2).In addition,the catalyst delivers superior discharge performance in both alkaline and neutral metal–air *** functional theory(DFT)calculations reveal that atomic La modulates the surface electronic configuration of MnO_(2),reduces its d-band center and thus lowers the OOH*and O*reaction energy *** work provides a new route for rational design of highly active electrocatalyst and holds great potential for application in various catalytic reactions.

关键词： Surface engineering Single atoms Electron injection Oxygen reduction reaction Metal-air batteries