咨询与建议

限定检索结果

文献类型

  • 41,501 篇 期刊文献
  • 2,599 册 图书
  • 1,601 篇 会议
  • 30 篇 学位论文
  • 27 篇 报纸

馆藏范围

  • 44,512 篇 电子文献
  • 1,289 种 纸本馆藏

日期分布

学科分类号

  • 15,888 篇 工学
    • 3,347 篇 材料科学与工程(可...
    • 1,784 篇 化学工程与技术
    • 1,571 篇 生物医学工程(可授...
    • 1,224 篇 机械工程
    • 974 篇 电子科学与技术(可...
    • 864 篇 地质资源与地质工...
    • 786 篇 计算机科学与技术...
    • 735 篇 动力工程及工程热...
    • 610 篇 仪器科学与技术
    • 603 篇 水利工程
    • 585 篇 电气工程
    • 574 篇 环境科学与工程(可...
  • 13,943 篇 医学
    • 11,562 篇 临床医学
    • 1,708 篇 医学技术(可授医学...
    • 1,145 篇 基础医学(可授医学...
    • 988 篇 中西医结合
    • 820 篇 公共卫生与预防医...
  • 7,639 篇 理学
    • 1,511 篇 物理学
    • 1,282 篇 化学
    • 1,071 篇 生物学
    • 1,008 篇 数学
    • 906 篇 地质学
    • 548 篇 地球物理学
  • 3,299 篇 农学
    • 775 篇 作物学
    • 726 篇 畜牧学
    • 552 篇 农业资源与环境
  • 1,732 篇 管理学
    • 734 篇 管理科学与工程(可...
    • 583 篇 公共管理
  • 1,164 篇 经济学
    • 1,012 篇 应用经济学
  • 1,019 篇 教育学
    • 770 篇 教育学
  • 873 篇 文学
  • 658 篇 法学
  • 376 篇 历史学
  • 332 篇 哲学
  • 276 篇 艺术学
  • 68 篇 军事学

主题

  • 266 篇 ct
  • 242 篇 mri
  • 240 篇 患者
  • 208 篇 美国
  • 154 篇 病人
  • 123 篇 of
  • 115 篇 mr
  • 113 篇 analysis
  • 88 篇 covid-19
  • 82 篇 北美洲
  • 72 篇 and
  • 71 篇 cancer
  • 70 篇 治疗
  • 66 篇 diabetes
  • 63 篇 temperature
  • 59 篇 acid
  • 58 篇 疾病
  • 56 篇 方程
  • 51 篇 高血压
  • 48 篇 大洋洲

机构

  • 74 篇 北京大学
  • 68 篇 university of mi...
  • 68 篇 中国科学院大学
  • 67 篇 institute for pa...
  • 67 篇 albert einstein ...
  • 67 篇 dipartimento di ...
  • 67 篇 nikhef p.o.box 4...
  • 67 篇 fysikum stockhol...
  • 67 篇 同济医科大学附属...
  • 66 篇 michigan state u...
  • 66 篇 tifr homi bhabha...
  • 66 篇 institut fur the...
  • 65 篇 dept.of physics ...
  • 64 篇 rudolf peierls c...
  • 64 篇 department of ph...
  • 64 篇 department of ph...
  • 63 篇 max-planck-insti...
  • 63 篇 nstitucio catala...
  • 63 篇 cern european or...
  • 63 篇 school of physic...

作者

  • 85 篇 f.krauss
  • 85 篇 g.weiglein
  • 85 篇 h.murayama
  • 85 篇 j.parsons
  • 85 篇 j.d.jackson
  • 85 篇 g.d'ambrosio
  • 85 篇 r.s.chivukula
  • 85 篇 y.kwon
  • 84 篇 m.white
  • 82 篇 m.drees
  • 81 篇 叶鹏
  • 74 篇 s.blusk
  • 61 篇 k.monig
  • 58 篇 p.de jong
  • 51 篇 郭战宏
  • 48 篇 o.dahl
  • 43 篇 刘凯
  • 43 篇 b.foster
  • 35 篇 王铮
  • 33 篇 t.gries

语言

  • 30,090 篇 中文
  • 15,654 篇 英文
检索条件"作者=G rodríguez-Leal"
45758 条 记 录,以下是91-100 订阅
排序:
Electron states and electron Raman scattering in semiconductor double cylindrical quantum well wire
收藏 引用
Chinese Physics B 2016年 第11期25卷 453-460页
作者: M Munguía-rodríguez Ri Betancourt-Riera Re Betancourt-Riera R Riera J M Nieto Jalil Departamento de Investigación en Física Universidad de Sonora Apartado Postal 5-88 83190 Hermosillo Sonora México Instituto Tecnológico de Hermosillo. Avenida Tecnologico S/N Col. Sahuaro 83170 Hermosillo Sonora México Tecnológico de Monterrey-Campus Sonora Norte. Bulevar Enrique Mazón Lopez No. 965 83000 Hermosillo Sonora México
The differential cross section for an electron Raman scattering process in a semiconductor gaAs/AlgaAs double quantum well wire is calculated,and expressions for the electronic states are *** system is modeled by cons... 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
An experimental study on the conversion between IFPUg and UCP functional size measurement units
收藏 引用
Journal of Zhejiang University-Science C(Computers and Electronics) 2014年 第3期15卷 161-173页
作者: Juan J.CUADRADO-gALLEgO Alain ABRAN Pablo rodríguez-SORIA Miguel A.LARA Ecole de Technologie Supérieure-ETS 1100 Notre-Dame Ouest Computer Science Department University of Alcala
The use of functional size measurement(FSM) methods in software development organizations is growing during the years. Also, object oriented(OO) techniques have become quite a standard to design the software and, in 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
Agro-Industrial Waste as a Source of Raw Material:Eggshell and Ash of Agave salmiana Useful for the Synthesis of Hydroxyapatite
收藏 引用
Journal of Renewable Materials 2022年 第12期10卷 3559-3572页
作者: Nora Elizondo-Villarreal Luz HVerástegui-Dominguez Jose JQuijano-Briones Francisco JVázquez-rodríguez Eden rodríguez-Castellanos Enrique López-Cuellar Ernesto Torres-Lopez Victor MCastaño-Meneses Universidad Autónoma de Nuevo León Facultad de Ciencias Fisico MatemáticasCiudad UniversitariaSan Nicolás de los GarzaNuevo LeónMéxico Universidad Autónoma de Nuevo León Facultad de ArquitecturaCiudad UniversiariaSan Nicolás de los GarzaNuevo LeónMéxico Universidad Autónoma de Nuevo León Facultad de Ingeniería Mecainicay EléctricaCiudad UniversitariaSan Nicolás de los GarzaNuevo LeónMéxico Centro de Física Aplicada y Tecnología Avanzada Universidad Nacional Autonoma de MéxicoQuerétaroMéxico
Agave salmiana ash and poultry eggshell powder as CaO sources were used for obtaining nanostructured hydro-xyapatite(HAP).The synthesis was carried out by the green Chemistry Hydrothermal Biosynthesis at 180℃ with a ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Novel genetic markers in inflammatory bowel disease
收藏 引用
World Journal of gastroenterology 2007年 第42期13卷 5560-5570页
作者: Lorena rodríguez-Bores gabriela C Fonseca Marco A Villeda Jesús K Yamamoto-Furusho IBD Clinic Department of Gastroenterology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Vasco de Quiroga 15 colonia Sección XVI Tlalpan CP 14000 México
genetic factors play a significant role in determining inflammatory bowel disease(IBD)*** data support genetic contribution to the pathogenesis of IBD,which include familial aggregation,twin studies,racial and ethnic ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Wood anatomical acclimation in the endemic genus Polylepis in Peruvian Andean forests
收藏 引用
Journal of Mountain Science 2024年 第9期21卷 2986-3000页
作者: Anthony gUERRA Fressia N.AMES-MARTÍNEZ Ernesto C.rodrÍguez-RAMÍREZ Postgraduate Programme in Agronomy/Plant Physiology Department of Biology-Institute of Natural Sciences Federal University of LavrasLavras 37203-202Minas Gerais 30000-31999Brazil Laboratory of Biotechnology and Molecular Biology Continental UniversitySan Antonio UrbanizationHuancayo 12000Peru Ecology and Biodiversity Research Programme ANDINUS AssociationMiguel Grau Street 370Huancayo 12000Peru Dendrochronology Laboratory Continental UniversitySan Carlos Avenue 1980Huancayo 12000Peru
Polylepis(Queñua)is a dominant woody plant genus in Andean Puna forests that occurs in a wide range of montane habitats and is ecologically diverse in endemism,which may be particularly threatened by climate *** anato... 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
Pisco grape pomace:Iron/copper speciation and antioxidant properties,towards their comprehensive utilization
收藏 引用
Food Bioscience 2022年 第3期47卷 1213-1221页
作者: Fátima rodríguez-Ramos Raúl Cañas-Sarazúa Vilbett Briones-Labarca Departamento de Ingeniería en Alimentos Universidad de La SerenaAv.Raúl Bitrán Nachary 1305Box 5991720010La SerenaChile
The pisco and wine industry produces hundreds of tons of grape pomace each year in Chile,generating environmental problems,and demanding urgent strategies for its *** aim of this work was to study the pisco grape poma... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Deadly oasis:Recurrent annihilation of Cretaceous desert bryophyte colonies;the role of solar,climate and lithospheric forcing
收藏 引用
geoscience Frontiers 2021年 第1期12卷 1-12页
作者: Juan Pedro rodríguez-Lópeza Eduardo Barrón Daniel Peyrot gary B.Hughes Department of geology.Faculty of Science.United Arab Emirates University.50009.Al Ain Abu DhabiUnited Arab Emirates Instituto geológico y Minero de Espana(IgME) Ríos Rosas 23E-28003MadridSpain School of Earth and Environment University of Western Australia.6101CrawleyWestern AustraliaAustralia Centre for Energy geosciences University of Western Australia.6101CrawleyWestern AustraliaAustralia Physics Department University of CaliforniaSanta BarbaraCA93106USA
Many oases(wet interdunes)are sedimentary systems characterized by high-frequency water-level oscillations,marked changes in salinity and intense biological activity at their *** are considered to be one of the most c... 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
Periodic Solutions in Unbounded Domains for the Boussinesq System
收藏 引用
Acta Mathematica Sinica,English Series 2010年 第5期26卷 837-862页
作者: Elder Jesús VILLAMIZAR-ROA María ngeles rodríguez-BELLIDO Marko Antonio ROJAS-MEDAR Escuela de Matemáticas Universidad Nacional de Colombia Dpto. Ecuaciones Diferenciales y Análisis Numérico Universidad de Sevilla Aptdo Dpto. de Ciencias Básicas Facultad de Ciencias Universidad del Bío BíoCampus Fernando May
Assuming that the external forces of the system are small enough, the reference temperature being a periodic function, we study the existence, the uniqueness and the regularity of time-periodic solutions for the Bouss... 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
Role of climatic variability in shaping intraspecific variation of thermal tolerance in Mediterranean water beetles
收藏 引用
Insect Science 2024年 第1期31卷 285-298页
作者: Susana Pallarés David garoffolo Belén rodríguez David Sánchez-Fernández Department of Zoology University of SevilleSevilleSpain Faculty of Biology Department of Ecology and HydrologyUniversity of MurciaCampus EspinardoMurciaSpain
The climatic variability hypothesis(CVH)predicts that organisms in more thermally variable environments have wider thermal breadths and higher thermal plasticity than those from more stable ***,due to evolutionary tra... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Weak Continuity of Riemann Integrable Functions in Lebesgue-Bochner Spaces
收藏 引用
Acta Mathematica Sinica,English Series 2010年 第2期26卷 241-248页
作者: J.M.CALABUIg J.rodríguez E.A.SNCHEZ-PREZ Instituto Universitario de Matemlica Pura y Aplicada Universidad Politcnica de Valencia
In general, Banach space-valued Riemann integrable functions defined on [0, 1] (equipped with the Lebesgue measure) need not be weakly continuous almost everywhere. A Banach space is said to have the weak Lebesgue 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