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Modulating p-type doping of two-dimensional material palladium diselenide

Nano Research 2024年第4期17卷 3232-3244页

作者： Jiali Yang Yu liu En-Yang Wang Jinbo Pang Shirong huang Thomas Gemming Jinshun Bi Alicja Bachmatiuk Hao Jia Shu-Xian Hu Chongyun Jiang Hong liu Gianaurelio Cuniberti Weijia Zhou Mark H Rümmeli Institute for Advanced Interdisciplinary Research(iAIR) University of JinanJinan 250022China Institute for Materials Chemistry Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhou 215006China school of Integrated Circuits University of Chinese Academy of SciencesBeijing 101408China Institute of Microelectronics of Tianjin Binhai New Area Tianjin 300451China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China Lukasiewicz Research Network PORT Polish Center for Technology DevelopmentStablowicka 147Wroclaw 54-066Poland school of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China College of electronic information and optical engineering Nankai UniversityTianjin 300350China Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie Sklodowskiej 34Zabrze 41-819Poland Center for Energy and Environmental Technologies VŠB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinan 250100China Dresden Center for Computational Materials science Technische Universität DresdenDresden 01062Germany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresden 01062Germany Institute for Materials science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresden 01069Germany Center for Advancing electronics Dresden Technische Universität DresdenDresden 01069Germany

The van der Waals heterostructures have evolved as novel materials for complementing the Si-based semiconductor ***-10 noble metal dichalcogenides(e.g.,PtS_(2.,PtSe_(2.,PdS_(2.,and PdSe_(2.)have been listed into two-dimensional(2.)materials toolkit to assemble van der Waals *** them,PdSe_(2. demonstrates advantages of high stability in air,high mobility,and wide tunable ***,the regulation of p-type doping of PdSe_(2. remains unsolved problem prior to fabricating p–n junction as a fundamental platform of semiconductor ***,a quantitative method for the controllable doping of PdSe_(2. is yet to be *** this study,the doping level of PdSe_(2. was correlated with the concentration of Lewis acids,for example,SnCl_(4),used for *** the transfer characteristics,the threshold voltage(the gate voltage corresponding to the minimum drain current)increased after SnCl_(4) soaking ***_(2. transistors were soaked in SnCl_(4) solutions with five different *** threshold voltages from the as-obtained transfer curves were extracted for linear fitting to the threshold voltage versus doping concentration correlation *** study provides in-depth insights into the controllable p-type doping of PdSe_(2..It may also push forward the research of the regulation of conductivity behaviors of 2. materials.

关键词： two-dimensional(2.)materials Lewis acid treatment p-type doping field-effect transistors transfer characteristic

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Brain-inspired artificial intelligence research: A review

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science china(Technological sciences) 2024年第8期67卷 2282-2296页

作者： WANG GuoYin BAO HuaNan liu Qun ZHOU Tiangang WU Si {2. TieJun YU ZhaoFei LU CeWu GONG YiHong ZHANG ZhaoXiang HE Sheng Chongqing Key Laboratory of Computational Intelligence Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Cyberspace Big Data Intelligent Security Chongqing University of Posts and TelecommunicationsChongqing 400065China College of computer and Information science Chongqing Normal UniversityChongqing 401331China State Key Laboratory of Brain and Cognitive science Institute of BiophysicsChinese Academy of SciencesBeijing 100101China school of Psychological and Cognitive sciences Peking UniversityBeijing 100871China State Key Laboratory of Multimedia Information Processing School of Computer SciencePeking UniversityBeijing 100871China Department of computer science School of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Electronic and Information engineering Xi’an Jiaotong UniversityXi’an 710049China The Center for Research on Intelligent Perception and Computing Institute of AutomationChinese Academy of SciencesBeijing 100190China Institute of Biophysics Chinese Academy of SciencesBeijing 100101China

Artificial intelligence(AI) systems surpass certain human intelligence abilities in a statistical sense as a whole, but are not yet the true realization of these human intelligence abilities and behaviors. There are differences, and even contradictions, between the cognition and behavior of AI systems and humans. With the goal of achieving general AI, this study contains a review of the role of cognitive science in inspiring the development of the three mainstream academic branches of AI based on the three-layer framework proposed by David Marr, and the limitations of the current development of AI are explored and analyzed. The differences and inconsistencies between the cognition mechanisms of the human brain and the computation mechanisms of AI systems are analyzed. They are found to be the cause of the differences and contradictions between the cognition and behavior of AI systems and humans. Additionally, eight important research directions and their scientific issues that need to focus on braininspired AI research are proposed: highly imitated bionic information processing, a large-scale deep learning model that balances structure and function, multi-granularity joint problem solving bidirectionally driven by data and knowledge, AI models that simulate specific brain structures, a collaborative processing mechanism with the physical separation of perceptual processing and interpretive analysis, embodied intelligence that integrates the brain cognitive mechanism and AI computation mechanisms,intelligence simulation from individual intelligence to group intelligence(social intelligence), and AI-assisted brain cognitive intelligence.

关键词： artificial intelligence cognitive science brain science intelligence science large language model

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基于同步网的BPEL建模和验证

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系统仿真学报 2007年第A1期19卷 97-100页

作者：徐春香屈婉玲王捍贫黄雨袁崇义北京大学信息科学技术学院软件研究所教育部高可信软件技术重点实验室北京100871

Web服务组合是面向服务架构的一个应用,是指将已有的Web服务组合成为新的服务。业务流程执行语言BPEL(Business Process Execution Language)是一种描述Web服务组合的语言。为了保证BPEL描述的Web服务组合的正确性,提出了分层建模和验... 详细信息

Web服务组合是面向服务架构的一个应用,是指将已有的Web服务组合成为新的服务。业务流程执行语言BPEL(Business Process Execution Language)是一种描述Web服务组合的语言。为了保证BPEL描述的Web服务组合的正确性,提出了分层建模和验证的思想,将BPEL流程分为逻辑层和语义层,并分别建立形式化模型和验证方法。这样不仅能保证对流程正确地建模,而且能降低建模和验证的复杂度。在逻辑层,BPEL元素映射为基于同步网的WSL_net模型。畅通性和无冗余变迁性质保证了BPEL流程基本控制流的正确性并避免了资源的浪费。语义层的建模和验证将另文给出。

关键词： Web服务组合 BPEL 建模验证同步网 WSL_net

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Friend or foe? Using eye-tracking technology to investigate the visual discrimination ability of giant pandas

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Current Zoology 2024年第4期70卷 430-439页

作者： Xinrui huang Guo Li Guiquan Zhang Zixiang Li Lin Zhao Mengdie Zhu Qinghua Xiang Xuefeng liu Mei Tian Hemin Zhang Christina D.Buesching Dingzhen liu Ministry of Education Key Laboratory of Biodiversity Science and Ecological EngineeringDepartment of EcologyCollege of Life SciencesBeijing Normal UniversityBeijing 100875China Key Laboratory of State Forestry and Grassland Administration on Conservation Biology of Rare Animals in the Giant Panda National Park China Conservation and Research Center for the Giant PandaSichuan 623004China school of computer and Information Technology Beijing Jiaotong UniversityBeijing 100044China beijing Key Laboratoryof CaptiveWildlife Technology Beijing ZooBeijing100044China Department of Biology Irving K.Barber Faculty of ScienceThe University of British ColumbiaOkanagan CampusKelownaBCCanada

The role that visual discriminative ability plays among giant pandas in social communication and individual discrimination has received less attention than olfactory and auditory ***,we used an eye-tracker technology to investigate pupil fixation patterns for 8 captive male giant pandas Ailuropoda *** paired images(N=2.)of conspecifics against:1)sympatric predators(gray wolves and tigers),and non-threatening sympatric species(golden pheasant,golden snub-nosed monkey,takin,and red panda),2.conspecifics with atypical fur colora-tion(albino and brown),and 3)zookeepers/non-zookeepers wearing either work uniform or plain *** each session,we tracked the pan-da's pupil movements and measured pupil first fixation point(FFP),fixation latency,total fixation count(TFC),and duration(TFD)of attention to each ***,pandas exhibited similar attention(FFPs and TFCs)to images of predators and non-threatening sympatric *** of golden pheasant,snub-nosed monkey,and tiger received less attention(TFD)than images of conspecifics,whereas images of takin and red panda received more attention,suggesting a greater alertness to habitat or food competitors than to potential ***'TFCs were greater for images of black-white conspecifics than for albino or brown phenotypes,implying that familiar color elicited more *** reacted differently to images of men versus *** images of women only,pandas gave more attention(TFC)to familiar combinations(uniformed zookeepers and plain-clothed non-zookeepers),consistent with the familiarity *** pandas can use visual perception to discriminate intra-specifically and inter-specifically,including details of human appearance,has applications for panda conservation and captive husbandry.

关键词： eye movement tracker giant panda images total fixation duration total pupil fixation count visual discrimination.

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iMashup:a mashup-based framework for service composition

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science china(Information sciences) 2014年第1期57卷 5-24页

作者： liu xuanzhe {2. {2. ZHAO Qi MEI Hong BLAKE M.Brian Key Laboratory of High Confidence Software Technologies (peking university) Ministry of Education school of electronics {2. and computer science Peking University Department of computer science and {2. University of Notre Dame

The Web has undergone a tremendous change from a primarily publication platform towards a participatory and"programmable"platform,where a large number of heterogeneous Web-delivered services(including SOAP and RESTful Web services,RSS and Atom feeds)are *** results in the creation of Web mashup applications with rich user ***,the integration of Web-delivered services is still a challenging *** not only requires the developers’tedious eforts in understanding and coordinating heterogeneous service types,but also results in the time-consuming development of user *** this paper,we propose the iMashup composition framework to facilitate mashup development and *** provide a unified mashup component model for the common representation of heterogeneous Web-delivered service *** component model specifies necessary properties and behaviors at both business and user interface *** associate the component model with semantically meaningful tags,so that mashup developers can fast understand the service *** mashup developers can search and put the proper mashup components into the Web browser based composition environment,and connect them by data flows based on the tag-based *** an integration manner might prevent some low-level programming eforts and improve the composition efciency.A series of experimental study are conducted to evaluate our framework.

关键词： service composition mashup component model Web-delivered service

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Co-enhancement of thermal conduction and radiation through morphologies controlling of graphene functional layer for chip thermal management

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Nano Research 2024年第10期17卷 8885-8892页

作者： Shuting Cheng Kun Wang Shichen Xu Yi Cheng Ruojuan liu Kewen huang Hao Yuan Wenjuan Li Yuyao Yang Fushun Liang Fan Yang Kangyi Zheng Zhiwei Liang Ce Tu Mengxiong liu Xiaomin Yang Jingnan Wang Xuzhao Gai Yuejie Zhao Xiaobai Wang Yue Qi Zhongfan liu State Key Laboratory of Heavy Oil Processing College of ScienceChina University of PetroleumBeijing 102249China Centre for Nanochemistry Beijing Science and Engineering Centre for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China beijing Graphene Institute(BGI) Beijing 100095China College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Department of Chemistry College of Chemistry and Materials EngineeringBeijing Technology and Business UniversityBeijing 100048China

With the continuous advancements in electronics towards downsizing and integration,efficient thermal dissipation from chips has emerged as a critical factor affecting their lifespan and operational *** fan-less chip cooling system has two critical interfaces for thermal transport,which are the contact interface between the base and the chip dominated by thermal conduction,and the surface of the fins dominated by thermal *** different thermal transfer modes of these two critical interfaces pose different requirements for thermal management *** the study,a novel approach was proposed by developing graphene thermal transport functional material whose morphology could be intentionally designed via reformed plasmaenhanced chemical vapor deposition(PECVD)methods to meet the diverse requirements of heat transfer ***,graphene with multilevel branching structure of vertical graphene(BVG)was fabricated through the hydrogenassisted PECVD(H_(2.-PECVD)strategy,which contributed a high emissivity of~*** was deposited on the fins’surface and functioned as the radiation enhanced layer to facilitate the rapid radiation of heat from the heat sinks into the surrounding ***,the well-oriented vertical graphene(OVG)was successfully prepared through the vertical electric field-assisted PECVD process(EF-PECVD),which showed a high directional thermal conductivity of~53.5 W·m^(-1)·K^(-1).OVG was deposited on the contact interface and functioned as the thermal conduction enhanced layer,allowing for the quick transmission of heat from the chip to the heat *** this design concept,the two critical interfaces in the chip cooling system can be jointly enhanced,resulting in a remarkable cooling efficiency enhancement of~30.7%,demonstrating that this novel material possessed enormous potential for enhancing the performance of cooling ***,this research not only provided new design concepts for the cooling system

关键词： chip thermal management thermal conduction thermal radiation graphene morphology control

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波分复用系统中偏振模色散特性的研究

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中国激光 2001年第12期28卷 1103-1107页

作者：刘秀敏杨伯君张晓光北京邮电大学理学院基础部

推导了双折射光纤中两个波长的光波所满足的耦合非线性薛定谔方程。建立了研究两信道波分复用(WDM)系统中偏振模色散效应的模型。基于这一模型,在考虑偏振模色散情况下,数值模拟了在两信道WDM系统中光信号的传输变化。

关键词：偏振模色散波分复用耦合非线性薛定谔方程数值模拟光纤通信

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Tribo-chemistry of lubricant depletion at head-disk interface

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science china Mathematics 2001年第S1期44卷 193-198页

作者： WANG Wei huang Qing WANG Haocai YANG Mingchu LUO Jianbin WEN Shizhu 1. Institute of information materials engineering, {2. of electronics science and Technology 2. {2. of Southwest Jiaotong {2. 3. State key laboratory of tribology, Tsinghua {2., beijing 100084, china

Lubricant on magnetic hard disk is essential to the stable lubrication at the head/diskinterface of the computer hard disk drive, The depletion phenomenon of the perfluoropolyalkylether(PFPE) lubricant ZDOL caused by the head was investigated. FC72., a type ofpoly(fiuoroalkylmethacrylate) used as anti-wetting-agent (AWA) on the magnetic head, and its ef-fect on reducing lubricant depletion was study. Time-of-flight secondary ion mass spectrometer(TOF-SIMS) was used to characterize the lubricant ZDOL and AWA. TOF-SIMS results suggestthat the lubricant depletion should be due to dynamic friction between the magnetic head and diskduring the head flying or seeking over the disk surface, the amount of lubricant picked up by thehead varying with the different flying height. The AWA coating layer on head obviously reduces theamount of lubricant picked-up. The possible molecular interaction mechanics of AWA and ZDOLwith DLC overcoat of the head was discussed.

关键词： Tribo-chemistry depletion ZDOL lubricant TOF-SIMS

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ADAPTIVE COPY AND DATA DISSEMINATION IN VEHICULAR AD-HOC NETWORKS

ADAPTIVE COPY AND DATA DISSEMINATION IN VEHICULAR AD-HOC NET...

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2.09 IEEE International Conference on Communication Technology and Applications（ICCTA2.09）

作者： Jianwei Niu~1 Chang liu~1 Canfeng Chen~2.Jian Ma~2.1school of {2. {2. and engineering Beihang university beijing 100191 china 2.Nokia Research Center beijing 100176 china

＜正＞Vehicular ad-hoc networks（VANETs） are promising for more and more intelligent transportation applications,where information is disseminated over a group of *** are characterized for its unstable framework,in which the isolated vehicles communicate with others only when the unexpected meetings occur. As a result,some available data dissemination schemes do not work well in VANETs. In this paper,we propose an opportunistic auto-adaptive dissemination scheme-Adaptive Copy and Spread（ACS） Algorithm - for VANETs,which makes use of the moving patterns of vehicles like direction and velocity,and dynamically adjusts the dissemination *** scheme dynamically increases or decreases the number of message copies inside the broadcast area,and vehicles can intelligently decide when to start or stop broadcast a *** is designed to keep the message at the effective area’s boundary to inform the entering vehicles as soon as *** simulation results show that ACS enhance the data dissemination performance significantly with a smaller network load compared with random choice algorithm and Epidemic dissemination algorithm over a series of scenarios.

关键词： Adaptive Copy and Spread Vehicular Ad hoc Networks Opportunistic Networks Data Dissemination

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空战武器装备的系统对抗分析

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系统工程理论与实践 2002年第9期22卷 117-120,127页

作者：黄俊刘华翔怀进鹏武哲北京航空航天大学计算机科学与工程系北京100083 北京航空航天大学飞行器设计与应用力学系北京100083

建立了空对空作战体系对抗的物理模型 ,基于多元兰彻斯特方程 ,给出了不同空战武器战术交战的数学模型 ,考虑现代战争的高技术特征 ,发展了战役优势参数的概念 ,使其更加准确地反映空对空作战的实质 .以数学模型和战役优势参数为核心 ,... 详细信息

建立了空对空作战体系对抗的物理模型 ,基于多元兰彻斯特方程 ,给出了不同空战武器战术交战的数学模型 ,考虑现代战争的高技术特征 ,发展了战役优势参数的概念 ,使其更加准确地反映空对空作战的实质 .以数学模型和战役优势参数为核心 ,采用随机分配目标战术和用“对数法”计算战斗机对空作战能力指数 ,实现了优势评估、进程预测、装备反算。

关键词：空战武器装备系统对抗分析作战效能战役优势兰彻斯特方程

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