咨询与建议

限定检索结果

文献类型

  • 77,703 篇 期刊文献
  • 5,318 册 图书
  • 5,223 篇 会议
  • 32 篇 学位论文
  • 19 篇 报纸

馆藏范围

  • 85,885 篇 电子文献
  • 2,529 种 纸本馆藏

日期分布

学科分类号

  • 31,470 篇 工学
    • 5,944 篇 材料科学与工程(可...
    • 3,591 篇 生物医学工程(可授...
    • 3,534 篇 化学工程与技术
    • 2,250 篇 机械工程
    • 2,178 篇 电子科学与技术(可...
    • 1,751 篇 计算机科学与技术...
    • 1,699 篇 地质资源与地质工...
    • 1,505 篇 动力工程及工程热...
    • 1,373 篇 仪器科学与技术
    • 1,198 篇 电气工程
    • 1,192 篇 水利工程
    • 1,054 篇 环境科学与工程(可...
  • 28,459 篇 医学
    • 22,994 篇 临床医学
    • 3,879 篇 医学技术(可授医学...
    • 2,839 篇 基础医学(可授医学...
    • 2,181 篇 中西医结合
    • 1,954 篇 公共卫生与预防医...
    • 1,358 篇 药学(可授医学、理...
  • 13,961 篇 理学
    • 2,472 篇 物理学
    • 2,294 篇 生物学
    • 2,233 篇 化学
    • 1,866 篇 地质学
    • 1,640 篇 数学
  • 7,530 篇 农学
    • 1,764 篇 作物学
    • 1,730 篇 畜牧学
    • 1,110 篇 农业资源与环境
  • 3,874 篇 管理学
    • 1,690 篇 管理科学与工程(可...
    • 1,180 篇 公共管理
  • 2,541 篇 经济学
    • 2,184 篇 应用经济学
  • 2,179 篇 教育学
    • 1,495 篇 教育学
  • 1,684 篇 文学
  • 1,563 篇 法学
  • 629 篇 艺术学
  • 589 篇 历史学
  • 586 篇 哲学
  • 176 篇 军事学

主题

  • 857 篇 ct
  • 805 篇 美国
  • 671 篇 mri
  • 519 篇 病人
  • 481 篇 患者
  • 418 篇 mr
  • 362 篇 北美洲
  • 291 篇 美利坚合众国
  • 189 篇 治疗
  • 180 篇 应用
  • 165 篇 cancer
  • 145 篇 中国
  • 141 篇 设计
  • 132 篇 诊断
  • 127 篇 儿童
  • 126 篇 analysis
  • 126 篇 产量
  • 119 篇 and
  • 118 篇 方程
  • 116 篇 英国

机构

  • 213 篇 北京大学
  • 117 篇 南京大学
  • 110 篇 清华大学
  • 102 篇 同济大学
  • 97 篇 同济医科大学附属...
  • 85 篇 university of ch...
  • 83 篇 美国加州大学
  • 81 篇 华中科技大学
  • 73 篇 中国科学院大学
  • 72 篇 浙江大学
  • 68 篇 university of mi...
  • 67 篇 institute for pa...
  • 67 篇 nikhef p.o.box 4...
  • 67 篇 fysikum stockhol...
  • 67 篇 michigan state u...
  • 66 篇 national researc...
  • 66 篇 institut fur the...
  • 66 篇 dept.of physics ...
  • 66 篇 compas group ins...
  • 66 篇 rudolf peierls c...

作者

  • 167 篇 叶鹏
  • 114 篇 郭俊
  • 85 篇 h.murayama
  • 85 篇 j.d.jackson
  • 85 篇 g.d'ambrosio
  • 84 篇 m.white
  • 71 篇 p.de jong
  • 69 篇 刘莉
  • 66 篇 朱国栋
  • 62 篇 j.zhang
  • 61 篇 唐光健
  • 60 篇 li j
  • 50 篇 china
  • 45 篇 王铮
  • 44 篇 郭战宏
  • 43 篇 胡孔足
  • 42 篇 余英豪
  • 41 篇 崔荣
  • 41 篇 v.i.belousov
  • 38 篇 李长根

语言

  • 63,131 篇 中文
  • 25,142 篇 英文
  • 1 篇 德文
  • 1 篇 法文
  • 1 篇 日文
  • 1 篇 其他
检索条件"作者=K.j.a"
88295 条 记 录,以下是1-10 订阅
排序:
Insm1:orchestrating cellular mimicry in the thymus medulla
收藏 引用
Cellular & Molecular Immunology 2024年 第4期21卷 414-416页
作者: k.D.james j.E.Cowan UCL Institute of Immunity and Transplantation The Pears BuildingRowland Hill StreetLondonNW32PPUK
The thymus is the primary production site for a functional and self-tolerant T-cell *** establishment of immune tolerance is mediated by the generation and presentation of tissue-restricted self-antigens(TRAs)by medul... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Use of donepezil for neurocognitive recovery after brain injury in adult and pediatric populations:a scoping review
收藏 引用
Neural Regeneration Research 2024年 第8期19卷 1686-1695页
作者: Avery L.Miller Nathan k.Evanson j.Michael Taylor University of Cincinnati College of Medicine CincinnatiOHUSA Department of Pediatrics University of CincinnatiCincinnatiOHUSA Department of Neurology and Rehabilitation Medicine University of CincinnatiCincinnatiOHUSA Division of Pediatric Rehabilitation Medicine Cincinnati Children’s Hospital Medical CenterCincinnatiOHUSA Division of Neurology Cincinnati Children’s Hospital Medical CenterCincinnatiOHUSA
There are few pharmacologic options for the treatment of cognitive deficits associated with traumatic brain injury in pediatric *** inhibitors such as donepezil have been evaluated in adult patients after traumatic br... 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
Supposition of graphene stacks to estimate the contact resistance and conductivity of nanocomposites
收藏 引用
Applied Mathematics and Mechanics(English Edition) 2024年 第4期45卷 663-676页
作者: Y.ZARE M.T.MUNIR G.j.WENG k.Y.RHEE Biomaterials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Department of Mechanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Department of Mechanical Engineering(Bk21 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea
In this study,the effects of stacked nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity of samples are evaluated with developed equ... 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
Bayesian inference-based wear prediction method for plain bearings under stationary mixed-friction conditions
收藏 引用
Friction 2024年 第6期12卷 1272-1282页
作者: Florian kÖNIG Florian WIRSING Georg jACOBS Rui HE Zhigang TIAN Ming j.ZUO Institute for Machine Elements and Systems Engineering RWTH Aachen UniversityAachen 52062Germany Department of Mechanical Engineering University of AlbertaEdmonton T6G1H9Canada Qingdao International Academician Park Research Institute Qingdao 266000China
This study introduces a method to predict the remaining useful life(RUL)of plain bearings operating under stationary,wear-critical *** this method,the transient wear data of a coupled elastohydrodynamic lubrication(mi... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Exploring public perception and willingness to pay for a renewable source of energy:evidence from an emerging economy of renewable-energy development
收藏 引用
Clean Energy 2024年 第2期8卷 177-188页
作者: Mohammed j.k.Bashir Senadjki Abdelhak Wael A.Salah Mai Abuhelwa School of Engineering&Technology Central Queensland University120 Spencer St.MelbourneQLD 3000Australia Faculty of Business and Finance Universiti Tunku Abdul RahmanKamparPerakMalaysia Department of Electrical Engineering College of Engineering and TechnologyPalestine Technical University-KadooriePO Box 7Yafa StreetTulkarmPalestine Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO 65211USA
The study focuses on the transition from conventional energy sources to sustainable renewable energy(RE)in Palestine,particularly in the West Bank and Gaza *** research aims to understand the relationship between key ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Photon orbits and phase transition for Letelier AdS black holes immersed in perfect fluid dark matter
收藏 引用
Chinese Physics C 2024年 第6期48卷 247-259页
作者: Ashima Sood Md Sabir Ali j.k.Singh Sushant G.Ghosh Department of Mathematics Netaji Subhas University of TechnologyNew Delhi-110078India Centre for Theoretical Physics Jamia Millia IslamiaNew Delhi 110025India Department of Physics Mahishadal Raj CollegePurba MedinipurWest Bengal721628India Institute of Theoretical Physics&Research Center of Gravitation Lanzhou UniversityLanzhou 730000China key Laboratory of Quantum Theory and Applications of MoE Lanzhou UniversityLanzhou 730000China Lanzhou Center for Theoretical Physics&key Laboratory of Theoretical Physics of Gansu Province Lanzhou UniversityLanzhou 730000China Astrophysics and Cosmology Research Unit School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa
We obtain an exact solution for spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter(PFDM).Considering the cosmological constant as the positive pressure of the system and volume as its... 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
Scoring microvascular invasion in hepatocellular carcinoma:are we meeting the grade?
收藏 引用
Hepatobiliary Surgery and Nutrition 2024年 第1期13卷 184-187页
作者: Derek j.Erstad kenneth k.Tanabe Division of Surgical Oncology Baylor College of MedicineHoustonTXUSA Division of Gastrointestinal and Oncologic Surgery Harvard Medical School and Massachusetts General HospitalBostonMAUSA
Hepatocellular carcinoma(HCC)is the second leading cause of cancer-related mortality and has rising global incidence(1).A perplexing aspect of this disease is the high rate of recurrence(50-70%)after curative-intent,m... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Sequential good lattice point sets for computer experiments
收藏 引用
Science China Mathematics 2024年 第9期67卷 2153-2170页
作者: Xue-Ru Zhang Yong-Dao Zhou Min-Qian Liu Dennis k.j.Lin NITFID LPMC&KLMDASRSchool of Statistics and Data ScienceNankai UniversityTianjin 300071China Department of Statistics Purdue UniversityWest LafayetteIN 47907USA
Sequential Latin hypercube designs(SLHDs) have recently received great attention for computer experiments, with much of the research restricted to invariant spaces. The related systematic construction methods are infl... 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
In vivo and in vitro study of resorbable magnesium wires for medical implants:Mg purity,surface quality,Zn alloying and polymer coating
收藏 引用
journal of Magnesium and Alloys 2024年 第6期12卷 2472-2488页
作者: k.Tesar j.Luňácková M.jex M.Žaloudková R.Vrbová M.Bartoš P.klein L.Vištejnová j.Dušková E.Filová Z.Sucharda M.Steinerová S.Habr k.Balík A.Singh Department of Materials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of Physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental Medicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Department of Physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Department of Composites and Carbon Materials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatomy First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biomedical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Department of Pathological Physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Department of Histology and Embryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of Pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Department of Biomaterials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural Materials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan
Magnesium is an excellent material in terms of biocompatibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and H_(2)generation limit the potential of Mg-based *** low... 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
A review of public health guidelines for postpartum physical activity and sedentary behavior from around the world
收藏 引用
journal of Sport and Health Science 2024年 第4期13卷 472-483,F0003页
作者: kelly R.Evenson Wendy j.Brown Alison k.Brinson Emily Budzynski-Seymour Melanie Hayman Department of Epidemiology Gillings School of Global Public HealthUniversity of North Carolina at Chapel HillChapel HillNC 27599-8050USA Faculty of Health Sciences and Medicine Bond UniversityGold CoastQLD 4226Australia School of Human Movement and Nutrition Sciences The University of QueenslandBrisbaneQLD 4072Australia Department of Anthropology University of North Carolina at Chapel HillChapel HillNC 27599-3115USA Carolina Population Center University of North Carolina at Chapel HillChapel HillNC 27599-8120USA Faculty of Sport Health and Social SciencesSolent UniversitySouthamptonSO140YNUK Appleton Institute School of HealthMedical and Applied SciencesCentral Queensland UniversityRockhamptonQLD 4701Australia
Background:The period following pregnancy is a critical time window when future habits with respect to physical activity(PA) and sedentary behavior(SB) are established;therefore,it warrants *** purpose of this scoping... 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