咨询与建议

限定检索结果

文献类型

  • 87,282 篇 期刊文献
  • 5,171 篇 会议
  • 3,867 册 图书
  • 150 篇 学位论文
  • 16 篇 报纸
  • 2 篇 多媒体

馆藏范围

  • 94,777 篇 电子文献
  • 1,791 种 纸本馆藏

日期分布

学科分类号

  • 34,314 篇 工学
    • 6,890 篇 材料科学与工程(可...
    • 3,891 篇 化学工程与技术
    • 3,743 篇 生物医学工程(可授...
    • 2,450 篇 电子科学与技术(可...
    • 2,370 篇 机械工程
    • 1,933 篇 计算机科学与技术...
    • 1,811 篇 动力工程及工程热...
    • 1,610 篇 地质资源与地质工...
    • 1,328 篇 仪器科学与技术
    • 1,310 篇 电气工程
    • 1,280 篇 力学(可授工学、理...
    • 1,217 篇 水利工程
    • 1,199 篇 环境科学与工程(可...
  • 33,231 篇 医学
    • 27,581 篇 临床医学
    • 4,048 篇 医学技术(可授医学...
    • 2,850 篇 基础医学(可授医学...
    • 2,395 篇 中西医结合
    • 1,939 篇 公共卫生与预防医...
    • 1,425 篇 药学(可授医学、理...
  • 16,548 篇 理学
    • 3,101 篇 物理学
    • 2,905 篇 化学
    • 2,702 篇 数学
    • 2,366 篇 生物学
    • 1,758 篇 地质学
  • 7,915 篇 农学
    • 1,917 篇 作物学
    • 1,745 篇 畜牧学
    • 1,291 篇 农业资源与环境
  • 3,532 篇 管理学
    • 1,579 篇 管理科学与工程(可...
  • 2,372 篇 经济学
    • 2,066 篇 应用经济学
  • 1,899 篇 教育学
    • 1,356 篇 教育学
  • 1,371 篇 法学
  • 1,308 篇 文学
  • 523 篇 历史学
  • 505 篇 艺术学
  • 465 篇 哲学
  • 153 篇 军事学

主题

  • 964 篇 ct
  • 841 篇 mri
  • 584 篇 美国
  • 530 篇 病人
  • 498 篇 患者
  • 429 篇 mr
  • 417 篇 and
  • 408 篇 of
  • 329 篇 cancer
  • 247 篇 北美洲
  • 218 篇 治疗
  • 206 篇 analysis
  • 194 篇 美利坚合众国
  • 189 篇 covid-19
  • 160 篇 disease
  • 153 篇 儿童
  • 147 篇 诊断
  • 141 篇 water
  • 134 篇 应用
  • 130 篇 energy

机构

  • 158 篇 北京大学
  • 133 篇 同济医科大学附属...
  • 105 篇 中国科学院大学
  • 100 篇 清华大学
  • 80 篇 浙江大学
  • 71 篇 华中科技大学同济...
  • 68 篇 university of mi...
  • 67 篇 institute for pa...
  • 67 篇 albert einstein ...
  • 66 篇 美国加州大学
  • 66 篇 dipartimento di ...
  • 66 篇 nikhef p.o.box 4...
  • 66 篇 fysikum stockhol...
  • 65 篇 michigan state u...
  • 61 篇 华中科技大学
  • 56 篇 香港理工大学
  • 54 篇 NOT FOUND
  • 54 篇 中国地质大学
  • 49 篇 南京农业大学
  • 47 篇 germany

作者

  • 238 篇 叶鹏
  • 234 篇 m.k
  • 123 篇 郭战宏
  • 113 篇 刘莉
  • 110 篇 郭俊
  • 85 篇 f.krauss
  • 85 篇 g.weiglein
  • 85 篇 h.murayama
  • 85 篇 j.parsons
  • 85 篇 j.d.jackson
  • 84 篇 g.d'ambrosio
  • 83 篇 r.s.chivukula
  • 74 篇 唐光健
  • 73 篇 y.kwon
  • 63 篇 李开
  • 52 篇 王亭忠
  • 50 篇 s.blusk
  • 49 篇 刘凯
  • 47 篇 m.white
  • 45 篇 余英豪

语言

  • 59,504 篇 中文
  • 36,971 篇 英文
  • 2 篇 日文
  • 1 篇 法文
检索条件"作者=m.A.Shah"
96488 条 记 录,以下是1-10 订阅
排序:
日粮精粗比、能量和酵母培养物添补对体外干物质降解的影响
收藏 引用
动物营养学报 2004年 第3期16卷 26-32页
作者: 谭支良 m.a.shah m.R.murphy 中国科学院亚热带农业生态研究所 Department of Animal Science University of IllinoisUrbanaIL 61801USA
本试验采集泌乳期奶牛的瘤胃液,按2×4×2因子设计,用体外尼龙袋发酵技术研究了60:40和50:50两种精粗比日粮,棉籽油作为能源在奶牛日粮中分别添补0%、2.5%、5%、10%和在日粮中分别添加0%、0.5%的酵母培养物及其互作对体外干物质降解率... 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
体外法研究日粮不同来源氮和碳水化合物比例对干物质体外降解率的影响
收藏 引用
动物营养学报 2004年 第4期16卷 18-24页
作者: 谭支良 周传社 m.a.shah m.R.murphy 中国科学院亚热带农业生态研究所 DepartmentofAnimalScience UniversityofIllinois UrbanaIL61801USA
本试验的氮源是纯化大豆蛋白(IsolatedSoybeanProtein,ISP)和尿素(NPN),按80:20、50:50和20:80分3组;碳水化合物源分别是从干草中提取的中性洗涤纤维(NDF)、玉米淀粉和蔗糖,按10:85:5、10:80:10、10:75:15、30:65:5、30:60:10、30:55:15... 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
日粮不同来源氮和碳水化合物比例对中性洗涤纤维体外降解率的影响
收藏 引用
动物营养学报 2005年 第1期17卷 29-29页
作者: 谭支良 周传社 m.a.shah m.R.murphy 中国科学院亚热带农业生态研究所 DepartmentofAnimalScience UniversityofIllinoisUrbanaIL61801USA
本试验的目的是研究日粮纯化大豆蛋白与尿素蛋白比例和NDF、淀粉与蔗糖比例及其组合对NDF和Dm体外降解率的影响,为优化高产泌乳期荷尔斯坦奶牛的日粮结构提供营养参数。试验将纯化大豆蛋白和尿素分别组合成80∶20、50∶50和20∶80三个比... 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
macular microvascular and structural changes on optical coherence tomography angiography in atypical optic neuritis
收藏 引用
World Journal of methodology 2025年 第1期15卷 88-94页
作者: Chinmay mahatme madhurima Kaushik Veerappan Rathinasabapathy Saravanan Karthik Kumar Virna m shah Department of General Ophthalmology Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia Department of Neuro-ophthalmology Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia Department of Vitreoretina Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia
BACKGROUND Atypical optic neuritis,consisting of neuromyelitis optica spectrum disorders(NmOSD)or myelin oligodendrocyte glycoprotein antibody disease(mOGAD),has a very similar presentation but different prognostic im... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells
收藏 引用
Nano-micro Letters 2025年 第1期17卷 310-332页
作者: Sajid Rauf muhammad Bilal Hanif Zuhra Tayyab matej Veis mAKYousaf shah Naveed mushtaq Dmitry medvedev Yibin Tian Chen Xia martin motola Bin Zhu College of mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of microelectronics Hubei UniversityWuhan 430062People’s Republic of China
The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high... 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
Research and development of the back-end electronics for the two-dimensional improved resistive plate chambers in CmS upgrade
收藏 引用
Radiation Detection Technology and methods 2021年 第2期5卷 181-191页
作者: P.Cao Z-A.Liu J.Zhao H.Kou J.Tao J.Song W.Gong N.Wang A.Samalan m.Tytgat N.Zaganidis G.A.Alves F.marujo F.Torres.Da.S.ilva.De.Araujo E.m.Da Costa D.De Jesus Damiao H.Nogima A.Santoro S.Fonseca De Souza A.Aleksandrov R.Hadjiiska P.Iaydjiev m.Rodozov m.Shopova G.Sultanov m.Bonchev A.Dimitrov L.Litov B.Pavlov P.Petkov A.Petrov S.J.Qian C.Bernal A.Cabrera J.Fraga A.Sarkar S.Elsayed Y.Assran m.El Sawy m.A.mahmoud Y.mohammed X.Chen C.Combaret m.Gouzevitch G.Grenier I.Laktineh L.mirabito K.Shchablo I.Bagaturia D.Lomidze I.Lomidze V.Bhatnagar R.Gupta P.Kumari J.Singh V.Amoozegar B.Boghrati m.Ebraimi R.Ghasemi m.mohammadi Najafabadi E.Zareian m.Abbrescia R.Aly W.Elmetenawee N.De Filippis A.Gelmi G.Iaselli S.Leszki F.Loddo I.margjeka G.Pugliese D.Ramos L.Benussi S.Bianco D.Piccolo S.Buontempo A.Di Crescenzo F.Fienga G.De Lellis L.Lista S.meola P.Paolucci A.Braghieri P.Salvini P.montagna C.Riccardi P.Vitulo B.Francois T.J.Kim J.Park S.Y.Choi B.Hong K.S.Lee J.Goh H.Lee J.Eysermans C.Uribe Estrada I.Pedraza H.Castilla-Valdez A.Sanchez-Hernandez C.A.mondragon Herrera D.A.Perez Navarro G.A.Ayala Sanchez S.Carrillo E.Vazquez A.Radi A.Ahmad I.Asghar H.Hoorani S.muhammad m.a.shah I.Crotty Department of Physics and Astronomy Ghent UniversityProeftuinstraat 869000 GhentBelgium Centro Brasileiro Pesquisas Fisicas R.Dr.Xavier Sigaud150-UrcaRio de JaneiroRJ 22290-180Brazil Dep.de Fisica Nuclear e Altas Energias Instituto de FisicaUniversidade do Estado do Rio de JaneiroRua Sao Francisco Xavier524BR-Rio de Janeiro 20559-900RJBrazil Bulgarian Academy of Sciences Inst.for Nucl.Res.and Nucl.EnergyTzarigradsko shaussee Boulevard 721784 SofiaBulgaria Faculty of Physics University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria School of Physics Peking UniversityBeijing 100871China Institute of High Energy Physics UCAS/CAS19(B)Yuquan RoadShijingshan DistrictBeijing 100049China Universidad de Los Andes Apartado Aereo 4976Carrera 1Eno.18A 10BogotaCOColombia Egyptian Network for High Energy Physics Academy of Scientific Research and Technology101 Kasr El-Einy St.CairoEgypt The British University in Egypt(BUE) P.O.Box 43Elsherouk CitySuez Desert RoadCairo 11837Egypt Suez University Elsalam CitySuez-Cairo RoadSuez 43522Egypt Department of Physics Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt Center for High Energy Physics Faculty of ScienceFayoum UniversityEl-Fayoum 63514Egypt Univ Lyon Univ Claude Bernard Lyon 1CNRS/IN2P3IP2I LyonUMR 582269622 VilleurbanneFrance Georgian Technical University 77 Kostava Str.Tbilisi 0175Georgia Department of Physics Panjab UniversityChandigarh 160014India School of Particles and Accelerators Institute for Research in Fundamental Sciences(IPM)P.O.Box 19395-5531TehranIran School of Engineering Damghan UniversityDamghan ***Iran INFN Sezione di BariVia Orabona 470126 BariItaly INFN Laboratori Nazionali di Frascati(LNF)Via Enrico Fermi 4000044 FrascatiItaly INFN Sezione di NapoliComplesso Univ.Monte S.AngeloVia Cintia80126 NaplesItaly INFN Sezione di PaviaVia Bassi 6PaviaItaly INFN Sezione di Pavia and University of PaviaVia Bassi 6PaviaItaly Hanyang University 222 Wangsimni-roSageun-dongSeongdong
Purpose To complement and ensure redundancy in the endcap muon system of the Compact muon Solenoid(CmS)detector and to extend the Resistive Plate Chamber(RPC)system coverage,improved RPCs(iRPCs)with either orthogonal ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
R&D of back-end electronics for improved resistive plate chambers for the phase 2 upgrade of the CmS end-capmuon system
收藏 引用
Radiation Detection Technology and methods 2022年 第3期6卷 306-316页
作者: H.Kou Z.-A.Liu J.Zhao J.Song Q.Hou W.Diao P.Cao W.Gong N.Wang A.Samalan m.Tytgat m.El Sawy G.A.Alves F.marujo E.A.Coelho F.Torres Da Silva De Araujo E.m.Da Costa H.Nogima A.Santoro S.Fonseca De Souza D.De Jesus Damiao m.Thiel m.Barroso Ferreira Filho K.mota Amarilo A.Aleksandrov R.Hadjiiska P.Iaydjiev m.Rodozov m.Shopova G.Sultanov A.Dimitrov L.Litov B.Pavlov P.Petkov A.Petrov E.Shumka S.J.Qian C.Avila D.Barbosa A.Cabrera A.Florez J.Fraga J.Reyes Y.Assran m.A.mahmoud Y.mohammed I.Laktineh G.Grenier m.Gouzevitch L.mirabito K.Shchablo C.Combaret W.Tromeur G.Galbit A.Luciol X.Chen I.Bagaturia I.Lomidze Z.Tsamalaidze V.Amoozegar B.Boghrati m.Ebraimi E.Zareian m.mohammadi Najafabadi m.Abbrescia G.Iaselli G.Pugliese F.Loddo N.De Filippis R.Aly D.Ramos W.Elmetenawee S.Leszki I.margjeka D.Paesani L.Benussi S.Bianco D.Piccolo S.meola S.Buontempo F.Carnevali L.Lista P.Paolucci F.Fienga A.Braghieri P.Salvini P.montagna C.Riccardi P.Vitulo E.Asilar J.Choi T.J.Kim S.Y.Choi B.Hong K.S.Lee H.Y.Oh J.Goh I.Yu C.Uribe Estrada I.Pedraza H.Castilla-Valdez R.L.Fernandez A.Sanchez-Hernandez E.Vazquez m.Ramirez-Garcia N.Zaganidis A.Radi H.Hoorani S.muhammad A.Ahmad I.Asghar m.a.shah W.A.Khan J.Eysermans I.Crotty on behalf of the CmS muon Group Department of Physics and Astronomy Ghent UniversityProeftuinstraat 869000 GhentBelgium UniversitéLibre de Bruxelles Avenue Franklin Roosevelt50-1050 BruxellesBelgium Centro Brasileiro Pesquisas Fisicas R.Dr.Xavier Sigaud150UrcaRio de JaneiroRio de Janeiro 22290-180Brazil Department de Fisica Nuclear e Altas Energias Instituto de FisicaUniversidade do Estado do Rio de JaneiroRua Sao Francisco Xavier524Rio de JaneiroRio de Janeiro 20559-900Brazil Bulgarian Academy of Sciences Institute for Nuclear Researches and Nuclear EnergyTzarigradsko Shaussee Boulevard 721784 SofiaBulgaria Faculty of Physics University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria School of Physics Peking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences B325Main BuildingNo.19(A)Yuquan RoadShijingshan DistrictBeijing 100049China Universidad de Los Andes Carrera 1No.18A-12BogotáColombia Egyptian Network for High Energy Physics Academy of Scientific Research and Technology101 Kasr El-Einy St.CairoEgypt Suez University SuezCairo RoadElsalam CitySuez 43522Egypt Center for High Energy Physics(CHEP-FU) Faculty of ScienceFayoum UniversityEl-Fayoum 63514Egypt Univ Lyon Univ Claude Bernard Lyon 1CNRS/IN2P3IP2I LyonUMR 582269622 VilleurbanneFrance Georgian Technical University 77 Kostava Str.0175 TbilisiGeorgia School of Particles and Accelerators Institute for Research in Fundamental Sciences(IPM)P.O.Box 19395-5531 TehranIran School of Engineering Damghan UniversityDamghan ***Iran INFN Sezione di BariVia Orabona 470126 BariItaly INFN Laboratori Nazionali di Frascati(LNF)Via Enrico Fermi 4000044 FrascatiItaly INFN Sezione di NapoliComplesso University Monte S.AngeloVia Cintia80126 NapoliItaly Dipartimento di Ingegneria Elettrica e delle Tecnologie dell’Informazione UniversitàDegli Studi di Napoli Federico II80126 NapoliI
Purpose The Large Hadron Collider(LHC)at European Organization for Nuclear Research is planned to be upgraded to the high luminosity *** the luminosity makes muon triggering reliable and offline reconstruction very ***... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Reflection of thermoelastic wave on the interface of isotropic half-space and tetragonal syngony anisotropic medium of classes 4, 4/m with thermomechanical effect
收藏 引用
Chinese Physics B 2016年 第3期25卷 414-417页
作者: Nurlybek A Ispulov Abdul Qadir m.a.shah Ainur K Seythanova Tanat G Kissikov Erkin Arinov S. Toraygyrov Pavlodar State University Pavlodar 140008 Kazakhstan Department of Electrical Engineering Sukkur Institute of Business Administration Sindh Pakistan Zhezkazgan University Kazakhstan
The thermoelastic wave propagation in a tetragonal syngony anisotropic medium of classes 4, 4/m having heterogeneity along z axis has been investigated by employing matrizant method. This medium has an axis of second-... 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
Enhancing secrecy rates in a wiretap channel
收藏 引用
Digital Communications and Networks 2020年 第1期6卷 129-135页
作者: shahid m.shah Vinod Sharma Department of ECE Indian Institute of ScienceBangalore560012India
Reliable communication imposes an upper limit on the achievable rate,namely the Shannon ***'s wiretap coding ensures a security constraint and reliability,but results in a decrease of achievable *** mitigate the loss ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
PREPARATION AND CHARACTERIZATION OF SCHIFF BASE POLYmERS DERIVED FROm 4,4'-mETHYLENEBIS(CINNAmALDEHYDE)
收藏 引用
Chinese Journal of Polymer Science 2007年 第4期25卷 399-407页
作者: m.Y. Khuhawar A. shah m.A. mughal Dr. m.A. Kazi Institute of Chemistry University of SindhJamshoroSindhPakistan
New Schiff base polymers poly[4,4'-methylenebis(cinnamaldehyde)ethylenediimine] (PmBCen), poly[4,4'- methylenebis(cinnamaldehyde)1,2-propylenediimine] (PmBCPn), poly[4,4'-methylenebis(cinnamaldehyde)1,3-p... 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