检索结果-南通市图书馆

From knowledge based software engineering to knowware based software engineering

在线全文

学校读者我要写书评

暂无评论

Science in China(Series F) 2008年第6期51卷 638-660页

作者： LU RuQian jin zhi Academy of Mathematics and System sciences & institute of {2. {3. Chinese Academy ofSciences Beijing 100190 China

The first part of this paper reviews our efforts on knowledge-based software engineering, namely PROMIS, started from 1990s. The key point of PROMIS is to generate applications automatically based on domain knowledge as well as software knowledge. That is featured by separating the development of domain knowledge from the development of software. But in PROMIS, we did not find an appropriate representation for the domain knowledge. Fortunately, in our recent work, we found such a carrier for knowledge modules, i.e. knowware. Knowware is a commercialized form of domain knowledge. This paper briefly introduces the basic definitions of knowware, knowledge middleware and knowware engineering. Three life circle models of knowware engineering and the design of corresponding knowware implementations are given. Finally we discuss application system automatic generation and domain knowledge modeling on the J2.E platform, which combines the techniques of PROMIS, knowware and J2.E, and the development and deployment framework, i.e. PROMIS/KW＊＊.

关键词： PROMIS knowledge based software engineering knowware J2.E PROMIS/KW** knowware based software engineering

Heterogeneous integration of InP HEMTs on quartz wafer using BCB bonding technology

在线全文

学校读者我要写书评

暂无评论

chinese Physics B 2022年第1期31卷 658-663页

作者： Yan-Fu Wang Bo Wang Rui-Ze Feng zhi-Hang Tong Tong Liu Peng ding Yong-Bo Su {2.g-Tao Zhou Feng Yang Wu-Chang ding zhi {2. University of chinese Academic of sciences Beijing 100029China High-Frequency High-Voltage Device and Integrated Circuits Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Guangxi Key Laboratory of Precision Navigation technology and Application Guilin University of Electronic TechnologyGuilin 541004China

Heterogeneous integrated InP high electron mobility transistors(HEMTs)on quartz wafers are fabricated successfully by using a reverse-grown InP epitaxial structure and benzocyclobutene(BCB)bonding *** channel of the new device is In_(0.7)Ga_(0.3.As,and the gate length is 100 nm.A maximum extrinsic transconductance gm,max of 855.5 mS/mm and a maximum drain current of 53..5 mA/mm are *** current gain cutoff frequency is as high as 2.2.GHz and the maximum oscillation frequency reaches 2.8 *** addition,a small signal equivalent circuit model of heterogeneous integration of InP HEMTs on quartz wafer is built to characterize device performance.

关键词： heterogeneous integration InP high electron mobility transistor quartz small-signal model

A one-step method for producing microencapsulated phase change materials

在线全文

学校读者我要写书评

暂无评论

Particuology 2010年第6期8卷 588-590页

作者： Yi jin Waipeng Lee Zenfira Musina Yulong ding institute of Process Engineering Chinese Academy of Sciences Beijing China institute of Particle Science & Engineering University of Leeds Clarendon Road LS2 9JT Leeds UK

This short communication reports our recent work on the synthesis and characterisation ofmicrocapsules of phase change materials using silica as the shell material through a one-step method. The method uses no surfactants or dispersants for stabilising the capsules. The results show that the one-step method allows the tuning of the size and polydispersity of the capsules, and the use of different core materials. Analyses of the capsules show that they contain about 65% phase change materials. The results also suggest no need for a stabilising agent due to self-stabilisation by the amine groups. Further work is underway to investigate the mechanical and thermal properties of the microcapsules and the scale-up of the method.

关键词： Microencapsulation Phase change materials One-step method Thermal energy storage

Frontiers in high entropy alloys and high entropy functional materials

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao Zhang Wen Huang Fu-Jie Yu Qi Zhao Xin-Dong Zhu Tao Feng Yao Jiang Xiao-Ming Li Xue-Fei Miao He Zhu Si Lan Xue-Qian Wang Bao-Long Shen Zhe Jia Feng-Qi Zhang Wei Wang Qi Liu Yang Ren Xun-Li Wang Xiao-Ya Cui Xiao-Yang Wang Ya-Nan Chen Bing-Bing Fan Meng-Ru Li Qi-Long Gao Jia-Ming Guo Zeng-Bao Jiao zhi-Min Guo Yu-Ping Zhao Qian Yu Rui Huang Ling-Kun Zhang Yi-Ping Lu Xu-Bo Li Huai-Jun Lin Yan Ma Wei-Ming Yang zhi-Hua Shen Hai-Yan He Yong-Gang Sun Yong-Jiang Huang De-Zhuang Wang Qing-Feng Liu Fei-Yang Wang Hui Liu Hong-Hui Wu Li-Qiang Wang Yang Lu Nan Wang Tian-Li Wang Wei-Bing Liao Yi-Han Wang Yuan Wu Yu-Zhen Yin Jie Pan Yi Zhang Qing Wang Jian-Yang Zhang Tao Yang Yasir Sohail {2.-Yu Zhang Hua Ji Qiang Li Wei-Di Liu zhi-Gang Chen Xiong-Jun Liu Wen Ma Liang Mao Zhen-Duo Wu School of Materials Science and Engineering Nanjing University of Science and Technology Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and Engineering Southeast University Department of Physics City University of Hong Kong School of Materials Science and Engineering Tianjin University School of Physics and Microelectronics Zhengzhou University Department of Mechanical Engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Key Laboratory of Solidification Control and Digital Preparation technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology institute of Advanced Wear & Corrosion Resistance and Functional Materials Jinan University School of Mechanics and Civil Engineering China University of Mining and Technology School of Physical sciences Great Bay University School of Materials Science andEngineering Harbin Institute of Technology State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University beijing Advanced Innovation Center for Materials Genome Engineering Research Institute for Carbon Neutrality University of Science and Technology Beijing Department of Mechanical Engineering The University of Hong Kong School of computing Macquarie University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing State Key Laboratory of Materials Processing and Die & Mould technology School of Materials Science and Engineering Huazhong University of Science and Technology institute of materials Shanghai University Department of Materials Science and Engineering C

Owing to their exceptional properties, high-entropy alloys(HEAs) and high-entropy materials have emerged as promising research areas and shown diverse applications. Here,the recent advances in the field are comprehensively reviewed,organized into five sections. The first section introduces the background of HEAs, covering their definition, significance,application prospects, basic properties, design principles, and microstructure. The subsequent section focuses on cutting-edge high-entropy structural materials, highlighting developments such as nanostructured alloys, grain boundary engineering,eutectic systems, cryogenic alloys, thin films, micro-nano-lattice structures, additive manufacturing, high entropy metallic glasses, nano-precipitate strengthened alloys, composition modulation, alloy fibers, and refractory systems. In the following section, the emphasis shifts to functional materials, exploring HEAs as catalysts, magneto-caloric materials, corrosion-resistant alloys, radiation-resistant alloys, hydrogen storage systems, and materials for biomedicine. Additionally, the review encompasses functional high-entropy materials outside the realm of alloys, including thermoelectric, quantum dots, nanooxide catalysts, energy storage materials, negative thermal expansion ceramics,and high-entropy wave absorption materials. The paper concludes with an outlook, discussing future directions and potential growth areas in the field. Through this comprehensive review,researchers, engineers, and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： Cutting-edge structural materials Cutting-edgefunctional materials High entropy alloys

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

“食药同源”的生物学原理

药学学报 2024年第6期59卷 1509-1518页

作者：丁劲文迟湘胤张玉王璐璐蒋建东林媛中国医学科学院、北京协和医学院药物研究所天然药物活性物质与功能国家重点实验室北京100050 中国医学科学院、北京协和医学院医药生物技术研究所北京100050

随着社会快速发展以及“健康中国”战略的提出,人民群众对生活质量和健康水平的需求日益增长,“食药同源”的理念也逐渐受到人们重视。“食药同源”概念在我国历史悠久,是我国传统医学中食疗、药膳、养生及治未病等多种思想的凝练。“... 详细信息

随着社会快速发展以及“健康中国”战略的提出,人民群众对生活质量和健康水平的需求日益增长,“食药同源”的理念也逐渐受到人们重视。“食药同源”概念在我国历史悠久,是我国传统医学中食疗、药膳、养生及治未病等多种思想的凝练。“食药同源”具有坚实的科学基础,其活性物质成分具有多种类、多机制和多靶点等特点,经过口服吸收及代谢转化后,发挥其生物学效应,而且安全性好。本文从化合物、生物大分子及肠道菌群与肠道这三方面解析多种“食药同源”物质发挥药理活性的化学基础及生物学原理;并以肠道菌群为主要研究内容,重点分析了几个经典“食药同源”物质的生物学原理;论述了研究“食药同源”的科学意义。本文旨在从现代医药学的角度来理解和探索“食药同源”这一传统理念的科学内涵,为新药研发及人类健康发展提供理论参考。

关键词：食药同源治未病肠道菌群化学基础药理作用标本兼治

在线全文

学校读者我要写书评

暂无评论

从《碧血剑》内外看满汉间的族群互动

天津师范大学学报(社会科学版) 2003年第1期 28-33页

作者：定宜庄胡鸿保中国社会科学院历史研究所中国人民大学社会学系北京10073. 北京100872

袁崇焕是明末清初之际最重要的历史人物之一 ,三百多年来 ,前贤学者有关他的传记和论著已经为数不少 ;金庸的《碧血剑》和《袁崇焕评传》,又给我们提供了武侠小说及其作者的审视视角 ;而为袁大将军守墓的佘家后人口耳相传的故事 ,则是... 详细信息

袁崇焕是明末清初之际最重要的历史人物之一 ,三百多年来 ,前贤学者有关他的传记和论著已经为数不少 ;金庸的《碧血剑》和《袁崇焕评传》,又给我们提供了武侠小说及其作者的审视视角 ;而为袁大将军守墓的佘家后人口耳相传的故事 ,则是民间流传文本 ,三种类型的文本对于这一真实的历史人物与事件的解释和表述方式有同有异 ,展示了不同的文化心态 ,反映出满汉族群互动关系的复杂性

关键词：小说口述史族群互动

A comparative study on radiation reliability of composite channel InP high electron mobility transistors

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

chinese Physics B 2021年第7期30卷 178-183页

作者： Jia-Jia Zhang Peng ding Ya-Nan jin Sheng-Hao Meng Xiang-Qian Zhao Yan-Fei Hu Ying-Hui Zhong {2. jin School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China institute of Microelectronics Chinese Academy of SciencesBeijing 100029China Microelectronics institute Xidian UniversityXi'an 710071China

This paper proposes a reasonable radiation-resistant composite channel structure for In P *** simulation results show that the composite channel structure has excellent electrical properties due to increased modulation doping efficiency and carrier ***,the direct current(DC)and radio frequency(RF)characteristics and their reliability between the single channel structure and the composite channel structure after 75-ke V proton irradiation are compared in *** results show that the composite channel structure has excellent radiation *** analysis demonstrates that the composite channel structure weakens the carrier removal *** phenomenon can account for the increase of native carrier and the decrease of defect capture rate.

关键词： proton irradiation composite channel InP HEMTs TCAD modeling

Preparation and Luminescence Properties of Nano-polycrystalline Cr3.:Lu3.a5O12

在线全文

学校读者我要写书评

暂无评论

Preparation and Luminescence Properties of Nano-polycrystall...

Predicting thermal conductivity of liquid suspensions of nanoparticles (nanofluids) based on rheology

第11届全国发光学学术会议

作者： LIU Wen-peng~(1,2.) ZHANG Qing-li~1 ding Li-hua~(1,2. SHAO Shu-fang~(1,2. SUN Dun-lu~1 XIAO jin~(1,2. YIN Shao-tang~1 1.Anhui {2. of Optics and Fine Mechanics,chinese Academy of {3.,Hefei 2.003.,China 2.Graduate University of chinese Academy of Science,beijing 100049,China

Polycrystalline Cr:LuGaO(Cr:LGG)was obtained by sintering the Cr:LGG precursor, which was synthesized via co-precipitation *** Ga,LuO and CrO were used as starting materials and ammonia as *** X-Ray diffraction patterns(XRD),excitation and emission spectra were *** XRD results show that co-precipitation precursor powder sintered at 1000℃ for 3. has translated into polycrystalline Cr:*** lattice constant and average grain size were 12.173.A and 2. nm,*** excitation spectrum comprises three parts,in which two bands positioned at 462.nm and 608 nm correspond to A→T, A→T transition of Cr and another below 3.0 nm ascribes to the charge transition of Cr. The emission spectrum extends from 600 nm to 840 nm,which is ascribed to the T→A transition of *** fluorescence decay curve monitored at 703.nm is exponential and the fluorescence decay lifetime is 890 μ*** results indicate that Cr:LGG is a promising material for tunable laser.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Particuology 2009年第2期7卷 151-157页

作者： Haisheng Chen Sanjeeva Witharanaa Yi jin Chongyoup Kim Yulong ding institute of Particle Science andEngineering University of Leeds Leeds LS2 9JT UK institute of Engineering Thermophysics Chinese Academy of Science Beijing 100190 China institute of Environmental Engineering University of Science and Technology Beijing 100083 China Department of Chemical and Biological Engineering Korea University Seoul Republic of Korea

A methodology is proposed for predicting the effective thermal conductivity of dilute suspensions of nanoparticles （nanofluids） based on rheology. The methodology uses the rheological data to infer microstructures of nanoparticles quantitatively, which is then incorporated into the conventional Hamilton-Crosser equation to predict the effective thermal conductivity of nanofluids. The methodology is experimentally validated using four types of nanofluids made of titania nanoparticles and titanate nanotubes dispersed in water and ethylene glycol. And the modified Hamilton-Zrosser equation successfully predicted the effective thermal conductivity of the nanofluids.

关键词： Nanofluids Thermal conductivity Rheology Viscosity Microstructure