咨询与建议

限定检索结果

文献类型

  • 12,863 篇 期刊文献
  • 1,163 册 图书
  • 740 篇 会议
  • 58 篇 学位论文
  • 45 篇 报纸
  • 3 篇 多媒体

馆藏范围

  • 14,315 篇 电子文献
  • 561 种 纸本馆藏

日期分布

学科分类号

  • 5,240 篇 工学
    • 960 篇 材料科学与工程(可...
    • 809 篇 计算机科学与技术...
    • 685 篇 化学工程与技术
    • 643 篇 电子科学与技术(可...
    • 540 篇 环境科学与工程(可...
    • 526 篇 机械工程
    • 494 篇 电气工程
    • 387 篇 建筑学
    • 354 篇 动力工程及工程热...
    • 353 篇 仪器科学与技术
    • 339 篇 信息与通信工程
    • 316 篇 地质资源与地质工...
  • 4,042 篇 医学
    • 3,220 篇 临床医学
    • 585 篇 公共卫生与预防医...
    • 503 篇 基础医学(可授医学...
  • 3,388 篇 理学
    • 1,143 篇 生物学
    • 692 篇 化学
    • 667 篇 物理学
    • 406 篇 数学
    • 348 篇 地球物理学
    • 348 篇 生态学
    • 346 篇 地质学
  • 1,490 篇 管理学
    • 652 篇 管理科学与工程(可...
    • 454 篇 公共管理
    • 388 篇 工商管理
  • 1,354 篇 农学
    • 409 篇 作物学
    • 364 篇 畜牧学
  • 1,094 篇 经济学
    • 961 篇 应用经济学
  • 805 篇 教育学
    • 521 篇 教育学
  • 681 篇 文学
    • 425 篇 外国语言文学
  • 514 篇 法学
  • 245 篇 艺术学
  • 164 篇 历史学
  • 161 篇 哲学
  • 34 篇 军事学

主题

  • 174 篇 中国
  • 92 篇 美国
  • 42 篇 analysis
  • 37 篇 气候变化
  • 37 篇 liver
  • 34 篇 mortality
  • 32 篇 dna
  • 31 篇 diabetes
  • 30 篇 management
  • 29 篇 metabolism
  • 27 篇 cancer
  • 26 篇 and
  • 25 篇 患者
  • 25 篇 软件
  • 25 篇
  • 24 篇 橡胶
  • 23 篇 品牌
  • 23 篇 性能
  • 23 篇 therapy
  • 22 篇 health

机构

  • 65 篇 北京大学
  • 51 篇 英国剑桥大学
  • 47 篇 澳大利亚monash大...
  • 43 篇 chongyang instit...
  • 42 篇 浙江大学
  • 39 篇 上海交通大学
  • 37 篇 清华大学
  • 28 篇 中国地质大学
  • 23 篇 中国科学院大学
  • 20 篇 复旦大学
  • 19 篇 中国人民大学
  • 19 篇 美国俄勒冈大学
  • 18 篇 health systems r...
  • 18 篇 section for inte...
  • 18 篇 中山大学
  • 18 篇 南京农业大学
  • 17 篇 首都医科大学
  • 17 篇 华东师范大学
  • 16 篇 华中科技大学
  • 16 篇 吉林大学

作者

  • 280 篇 john
  • 112 篇 john ross
  • 39 篇 john emsley
  • 38 篇 约翰·斯彼克曼
  • 26 篇 john gu
  • 24 篇 john edwards
  • 23 篇 simon lewin
  • 23 篇 李幼平
  • 19 篇 约翰·马特森
  • 18 篇 john abraham
  • 18 篇 艾哲庸
  • 17 篇 杨辉
  • 17 篇 john murtagh
  • 16 篇 蒋兰慧
  • 16 篇 john roach
  • 15 篇 john richardson
  • 15 篇 朱岳
  • 14 篇 john clyman
  • 14 篇 约翰·杜威
  • 14 篇 john.

语言

  • 8,907 篇 中文
  • 5,960 篇 英文
  • 1 篇 日文
检索条件"作者=john d.d.ckerty"
14872 条 记 录,以下是1-10 订阅
排序:
Aerodynamics of a Tandem-Bladed Axial Compressor Rotor under Circumferential distortion at different Rotational Speeds
收藏 引用
Journal of Thermal Science 2024年 第4期33卷 1340-1356页
作者: Amit KUMAR Jerry T.john A.M.PRAdEEP R.A.dAKKERMANS dragan KOZULOVIC department of Aerospace Engineering Indian Institute of Technology BombayMumbai400076India department of Automotive and Aeronautical Engineering Hamburg University of Applied Sciences20099HamburgGermany Institute of Jet Propulsion Bundeswehr University Munich85577NeubibergGermany
For most aircraft engines,inflow distortion is *** distortion is known to degrade the aerodynamic performance and stable operating limits of a *** rotor configuration is an arrangement that effectively controls the gr... 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
Hepatic angiotensin-converting enzyme 2 expression in metabolic dysfunction-associated steatotic liver disease and in patients with fatal COVId-19
收藏 引用
World Journal of Gastroenterology 2024年 第31期30卷 3705-3716页
作者: Angus K Jacobs Steven d Morley Kay Samuel Katie Morgan Lyndsey Boswell Timothy J Kendall david A dorward Jonathan A Fallowfield Peter C Hayes john N Plevris Hepatology Laboratory University of EdinburghEdinburgh EH164SBUnited Kingdom Scottish National Blood Transfusion Service Jack Copland CentreEdinburgh EH144BEUnited Kingdom Institute for Regeneration and Repair University of EdinburghEdinburgh EH164UUUnited Kingdom Edinburgh Pathology University of EdinburghEdinburgh EH164SBUnited Kingdom
BACKGROUNd Metabolic dysfunction-associated steatotic liver disease(MASLd),characterised by hepatic lipid accumulation,causes inflammation and oxidative stress accompanied by cell damage and *** injury(LI)is also freq... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Challenges and Opportunities in Preserving Key Structural Features of 3d-Printed Metal/Covalent Organic Framework
收藏 引用
Nano-Micro Letters 2024年 第8期16卷 362-381页
作者: Ximeng Liu dan Zhao john Wang department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore National University of Singapore(Chongqing)Research Institute Chongqing 401123People’s Republic of China
Metal-organic framework(MOF)and covalent organic framework(COF)are a huge group of advanced porous materials exhibiting attractive and tunable microstructural features,such as large surface area,tunable pore size,and ... 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
Experimental and analytical investigation on friction resistance force between buried coated pressurized steel pipes and soil
收藏 引用
Frontiers of Structural and Civil Engineering 2024年 第4期18卷 615-629页
作者: Shaurav ALAM Tanvir MANZUR john MATTHEWS Chris BARTLETT Erez ALLOUCHE Brent KEIL john KRAFT department of Civil Engineering and Construction Engineering Technology Louisiana Tech UniversityRustonLA 71270USA department of Civil Engineering Bangladesh University of Engineering and TechnologyDhaka 1000Bangladesh Georgia Tech Research Institute AtlantaGA 30332USA Stantec Inc. Edmonton T5J0K4Canada North West Pipe Company VancouverWA 98684USA
This paper presents an analytical approach for estimating frictional resistance to pipe movement at soil and external pipe surface of buried coated pressurized steel pipes relative to the internal thrust *** proposed ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
A Population dynamics Approach to the distribution of Space debris in Low Earth Orbit
收藏 引用
Communications on Applied Mathematics and Computation 2024年 第1期6卷 340-353页
作者: john Jurkiewicz Peter Hinow department of Mathematical Sciences University of Wisconsin-MilwaukeeMilwaukeeWI53201USA
The presence of the debris in the Earth’s orbit poses a significant risk to human activity in outer *** debris population continues to grow due to ground launches,the loss of external parts from space ships,and uncon... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Older Adult Compendium of Physical Activities:Energy costs of human activities in adults aged 60 and older
收藏 引用
Journal of Sport and Health Science 2024年 第1期13卷 13-17,F0003页
作者: Erik A.Willis Stephen d.Herrmann Mary Hastert Chelsea L.Kracht Tiago V.Barreira john M.Schuna Jr. Zhenghua Cai Minghui Quan Scott A.Conger Wendy J.Brown Barbara E.Ainsworth Center for Health Promotion and disease Prevention University of North Carolina at Chapel HillChapel HillNC 27599USA Kansas Center for Metabolism and Obesity Research The University of Kansas Medical CenterKansas CityKS 66160USA division of Physical Activity and Weight Management Department of Internal MedicineUniversity of Kansas Medical CenterKansas CityKS 66160USA Clinical Science division Pennington Biomedical Research CenterBaton RougeLA 70808USA Exercise Science department Syracuse UniversitySyracuseNY 13244USA School of Exercise&Sport Science Oregon State UniversityCorvallisOR 97331USA School of Exercise and Health Shanghai University of SportShanghai 200438China department of Kinesiology Boise State UniversityBoiseID 83725USA School of Human Movement and Nutrition Sciences The University of QueenslandSt.LuciaQLD 4072Australia Faculty of Health Sciences and Medicine Bond UniversityGold CoastQLD 4229Australia College of Health Solutions Arizona State UniversityPhoenixAZ 85003USA
Purpose:To describe the development of a Compendium for estimating the energy costs of activities in adults>60 years(OA Compendium).Methods:Physical activities(PAs)and their metabolic equivalent of task(MET)values wer... 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
Surgical treatment of inflammatory bowel disease:From the gastroenterologist’s stand-point
收藏 引用
World Journal of Gastrointestinal Surgery 2024年 第5期16卷 1235-1254页
作者: john K Triantafillidis Inflammatory Bowel disease Unit “Metropolitan General”HospitalHolargos 15562AtticaGreece Hellenic Society of Gastrointestinal Oncology Haidari 12461AthensGreece
Treatment of ulcerative colitis(UC)and Crohn’s disease(Cd)represents,in the majority of cases,a real challenge to the gastroenterologist’s abilities and skills as well as a clinical test concerning his/her levels of... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Conservative management of spinal pathology with autologous conditioned serum: A systematic review of the literature
收藏 引用
World Journal of Orthopedics 2024年 第9期15卷 870-881页
作者: Christian J Rajkovic Matthew L Merckling Alyssa W Lee Galadu Subah Aryan Malhotra Zachary d Thomas Sabrina L Zeller john V Wainwright Merritt d Kinon department of Neurosurgery Westchester Medical CenterValhallaNY 10595United States
BACKGROUNd Chronic inflammatory pain is associated with increased expression of interleukin(IL)-1,an inflammatory cytokine,and activity on its receptor(IL-1R).In response,the body produces IL-1R antagonist(IL-1Ra)to r... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Study of hybrid nanofluid flow in a stationary cone-disk system with temperature-dependent fluid properties
收藏 引用
Applied Mathematics and Mechanics(English Edition) 2024年 第4期45卷 677-694页
作者: A.S.john B.MAHANTHESH G.LORENZINI Center for Mathematical Needs Department of MathematicsCHRIST(Deemed to be University)Karnataka 560029India School of Mathematical and Statistical Sciences The University of Texas Rio Grande ValleyTexas 78539U.S.A. department of Engineering and Architecture University of ParmaParma 43124Italy
Cone-disk systems find frequent use such as conical diffusers,medical devices,various rheometric,and viscosimetry *** this study,we investigate the three-dimensional flow of a water-based Ag-Mg O hybrid nanofluid in a... 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
2024 Adult Compendium of Physical Activities:A third update of the energy costs of human activities
收藏 引用
Journal of Sport and Health Science 2024年 第1期13卷 6-12页
作者: Stephen d.Herrmann Erik A.Willis Barbara E.Ainsworth Tiago V.Barreira Mary Hastert Chelsea L.Kracht john M.Schuna Jr. Zhenghui Cai Minghui Quan Catrine Tudor-Locke Melicia C.Whitt-Glover david R. Jacobs Jr. Kansas Center for Metabolism and Obesity Research University of Kansas Medical CenterKansas CityKS 66160USA division of Physical Activity and Weight Management Department of Internal MedicineUniversity of Kansas Medical CenterKansas CityKS 66160USA Center for Health Promotion and disease Prevention University of North Carolina at Chapel HillChapel HillNC 27599USA College of Health Solutions Arizona State UniversityPhoenixAZ 85003USA School of Exercise and Health Shanghai University of SportShanghai 200438China Exercise Science department Syracuse UniversitySyracuseNY 13244USA Clinical Sciences division Pennington Biomedical Research CenterBaton RougeLA 70808USA School of Exercise and Sport Science Oregon State UniversityCorvallisOR 97331USA College of Health and Human Services University of North Carolina at CharlotteCharlotteNC 28223USA Gramercy Research Group KnightdaleNC 27545USA division of Epidemiology and Community Health School of Public HealthUniversity of MinnesotaMinneapolisMN 55454USA
Background:The Compendium of Physical Activities was published in 1993 to improve the comparability of energy expenditure values assigned to self-reported physical activity(PA)across *** original version was updated i... 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