咨询与建议

限定检索结果

文献类型

  • 61,691 篇 期刊文献
  • 1,857 篇 会议

馆藏范围

  • 63,548 篇 电子文献
  • 0 种 纸本馆藏

日期分布

学科分类号

  • 35,817 篇 工学
    • 8,944 篇 材料科学与工程(可...
    • 7,689 篇 化学工程与技术
    • 3,550 篇 电子科学与技术(可...
    • 2,778 篇 计算机科学与技术...
    • 2,470 篇 机械工程
    • 2,257 篇 电气工程
    • 2,210 篇 光学工程
    • 1,887 篇 控制科学与工程
    • 1,854 篇 软件工程
    • 1,839 篇 水利工程
    • 1,810 篇 仪器科学与技术
    • 1,571 篇 力学(可授工学、理...
    • 1,518 篇 环境科学与工程(可...
    • 1,316 篇 动力工程及工程热...
    • 1,182 篇 土木工程
    • 1,159 篇 农业工程
    • 1,128 篇 地质资源与地质工...
  • 25,030 篇 理学
    • 7,502 篇 物理学
    • 5,356 篇 化学
    • 3,150 篇 生物学
    • 2,728 篇 数学
    • 1,575 篇 生态学
    • 1,539 篇 大气科学
    • 1,411 篇 地质学
  • 10,419 篇 医学
    • 7,111 篇 临床医学
    • 1,172 篇 药学(可授医学、理...
    • 917 篇 中西医结合
  • 7,782 篇 农学
    • 3,030 篇 农业资源与环境
    • 2,110 篇 作物学
  • 2,402 篇 管理学
    • 1,604 篇 管理科学与工程(可...
  • 945 篇 经济学
  • 297 篇 教育学
  • 219 篇 文学
  • 161 篇 军事学
  • 134 篇 艺术学
  • 133 篇 法学
  • 71 篇 历史学
  • 39 篇 哲学

主题

  • 640 篇 soil
  • 319 篇 of
  • 298 篇 deep learning
  • 249 篇 analysis
  • 227 篇 and
  • 226 篇 machine learning
  • 219 篇 state
  • 215 篇 model
  • 203 篇 covid-19
  • 201 篇 stability
  • 200 篇 china
  • 183 篇 structure
  • 171 篇 microstructure
  • 165 篇 quantum
  • 162 篇 cancer
  • 160 篇 rare earths
  • 151 篇 water
  • 146 篇 climate change
  • 142 篇 system
  • 118 篇 inflammation

机构

  • 1,115 篇 university of ch...
  • 235 篇 university of ch...
  • 200 篇 state key labora...
  • 86 篇 state key labora...
  • 70 篇 collaborative in...
  • 67 篇 university of mi...
  • 67 篇 institute for pa...
  • 67 篇 albert einstein ...
  • 66 篇 dipartimento di ...
  • 66 篇 nikhef p.o.box 4...
  • 65 篇 fysikum stockhol...
  • 62 篇 ieee
  • 58 篇 department of ch...
  • 56 篇 graduate univers...
  • 55 篇 department of au...
  • 50 篇 michigan state u...
  • 44 篇 state key labora...
  • 42 篇 state key labora...
  • 40 篇 state key labora...
  • 32 篇 state key labora...

作者

  • 147 篇 lei wang
  • 124 篇 jian wang
  • 124 篇 wei li
  • 121 篇 wei wang
  • 115 篇 wei zhang
  • 95 篇 feng liu
  • 94 篇 xi chen
  • 91 篇 bin wang
  • 86 篇 lei zhang
  • 85 篇 rui wang
  • 84 篇 f.krauss
  • 84 篇 g.weiglein
  • 84 篇 h.murayama
  • 84 篇 j.parsons
  • 83 篇 j.d.jackson
  • 81 篇 g.d'ambrosio
  • 80 篇 r.s.chivukula
  • 69 篇 y.kwon
  • 68 篇 yu zhang
  • 64 篇 yang liu

语言

  • 56,671 篇 英文
  • 6,877 篇 中文
检索条件"机构=Department of Soil Science North Dakota State University"
63548 条 记 录,以下是4991-5000 订阅
排序:
Multiwavelength erbium-doped fiber laser exploiting intracavity polarization inhomogeneity
收藏 引用
science China(Technological sciences) 2000年 第2期43卷 194-198页
作者: 孙军强 丘军林 黄德修 1. department of Optoelectronic Engineering Huazhong University of Science and Technology 430074 Wuhan China 2. state Key Laboratory of Laser Technology Huazhong University of Science and Technology 430074 Wuhan China
Simultaneous multiwavelength lasing is demonstrated exploiting intracavity polarization in-homogeneity in an erbium-doped fiber laser. Experiments indicate that polarization hole burning can be enhanced by the changes... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Bitter receptor TAS2R138 facilitates lipid droplet degradation in neutrophils during Pseudomonas aeruginosa infection
收藏 引用
Signal Transduction and Targeted Therapy 2021年 第7期6卷 2154-2163页
作者: Qinqin Pu Kai Guo Ping Lin Zhihan Wang Shugang Qin Pan Gao Colin Combs Nadeem Khan Zhenwei Xia Min Wu department of Biomedical sciences School of Medicine and Health SciencesUniversity of North DakotaGrand ForksNDUSA department of Neurology University of MichiganAnn ArborMlUSA Wound Trauma Medical Center State Key Laboratory of TraumaBurns and Combined InjuryDaping HospitalArmy Medical UniversityChongqingChina Biological science Research Center Southwest UniversityChongqing 400716China West China School of Basic Medical sciences&Forensic Medicine Sichuan UniversityChengduSichuanChina state Key Laboratory of Biotherapy and Cancer Center West China HospitalSichuan Universityand Collaborative Innovation Center for BiotherapyChengduSichuanChina department of Pediatrics Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiPeople's Republic of China
Bitter receptors function primarily in sensing taste,but may also have other functions,such as detecting pathogenic organisms due to their agile response to foreign *** mouse taste receptor type-2 member 138(TAS2R138)... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Luminescence of halophosphate solid-solution Ca5(PO4)3(F0.8Cl0.2):Eu^2+,Mn^2+ for WLED
收藏 引用
Journal of Rare Earths 2018年 第11期36卷 1157-1161页
作者: Jiashan Mao Hongwei Fang Yonghu Chen department of Physics University of Science and Technology of China Hefei 230026 China The science and Technology department of Fujian Province Fuzhou 350003 China
Solid-solution based luminescent materials have been widely explored due to their tunable optical properties in recent years. In this work, instead of more common cation-substitution approach, we investigated the lumi... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Gap analysis in decision support systems for real-estate in the era of the digital earth
收藏 引用
International Journal of Digital Earth 2021年 第1期14卷 121-138页
作者: Hamidreza Rabiei-Dastjerdi Gavin McArdle Stephen A.Matthews Peter Keenan School of Computer science and CeADAR University College Dublin(UCD)DublinIreland department of Sociology&Criminology and department of Anthropology The Pennsylvania State UniversityUniversity ParkUSA School of Business University College Dublin(UCD)DublinIreland
Searching for a property is inherently a multicriteria spatial *** decision is primarily based on three high-level criteria composed of household needs,building facilities,and location *** choice is driven by diverse ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Nonreciprocal metasurface with space-time phase modulation
收藏 引用
Light(science & Applications) 2019年 第1期8卷 30-38页
作者: Xuexue Guo Yimin Ding Yao Duan Xingjie Ni department of Electrical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA
Creating materials with time-variant properties is critical for breaking reciprocity that imposes fundamental limitations on wave ***,it is challenging to realize efficient and ultrafast temporal modulation in a photo... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Furan Donor for NIR-II Molecular Fluorophores with Enhanced Bioimaging Performance
收藏 引用
Research 2023年 第3期6卷 377-387页
作者: Chunchen Liu Mengfei Li Huilong Ma Zhubin Hu Xinyuan Wang Rui Ma Yingying Jiang Haitao Sun Shoujun Zhu Yongye Liang department of Materials science and Engineering Shenzhen Key Laboratory of Printed Organic ElectronicsSouthern University of Science and TechnologyShenzhen 518055China state Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China state Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China department of Chemistry and Bio-X Stanford UniversityStanfordCA 94305USA Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi 030006China
The second near-infrared(NIR-II,1,000 to 1,700 nm)molecular fluorophores containing donor–acceptor–donor conjugated backbone have attracted substantial attention due to their outstanding advantages,such as stable em... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Efficient three-step entanglement concentration for an arbitrary four-photon cluster state
收藏 引用
Chinese Physics B 2013年 第3期22卷 137-142页
作者: 司斌 苏石磊 孙立莉 程留永 王洪福 张寿 department of Physics College of ScienceYanbian University Center for the Condensed-Matter science and Technology Department of PhysicsHarbin Institute of Technology School of Physics and Optoelectronic Technology Dalian University of Technology
We propose an entanglement concentration protocol to concentrate an arbitrary partially-entangled four-photon cluster *** a pioneering three-step entanglement concentration scheme,our protocol only needs a single-phot... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
On random coefficient INAR(1) processes
收藏 引用
science China Mathematics 2013年 第1期56卷 177-200页
作者: ROITERSHTEIN Alexander ZHONG Zheng department of Mathematics Iowa State University
The random coefficient integer-valued autoregressive process was introduced by Zheng,Basawa,and Datta in *** this paper we study the asymptotic behavior of this model(in particular,weak limits of extreme values and th... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Preparation and Mechanical Properties of HIPS Composites Containing PS-grafted-hydroxyapatite Particles
收藏 引用
Journal of Wuhan university of Technology(Materials science) 2005年 第B12期20卷 52-55页
作者: 龚兴厚 解孝林 department of Chemistry Huazhong University of Science and Technology Wuhan 430074 China department of Chemistry Huazhong University of Science and Technology Wuhan 430074 ChinaState Key Laboratory of Plastic Forming Simulation and Die & Mould TechnologyHuazhong University of Science and Technology Wuhan 430074 China
The surfaces of the micron- sized HA particles were modified by in situ copolymerization of vinyl triethoxyl silane (VIES) and styrene ( St ). Then, the modified HA particles were compounded with HIPS. The results... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Perspectives on search strategies in automated test input generation
收藏 引用
Frontiers of Computer science 2020年 第3期14卷 217-219页
作者: Yang CAO Yanyan JIANG Chang XU Jun MA Xiaoxing MA state Key Laboratory for Novel Software Technology Nanjing UniversityNanjing 210023China department of Computer science and Technology Nanjing UniversityNanjing 210023China
1 Introduction Automatically generating a limited number of high-quality inputs to reveal bugs,crashes,and hangs becomes a central problem in software testing research[1].The two most extensively studied approaches to... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论