咨询与建议

限定检索结果

文献类型

  • 18,276 篇 期刊文献
  • 1,005 篇 会议
  • 213 册 图书
  • 17 篇 学位论文

馆藏范围

  • 19,436 篇 电子文献
  • 83 种 纸本馆藏

日期分布

学科分类号

  • 8,819 篇 医学
    • 7,636 篇 临床医学
    • 1,007 篇 基础医学(可授医学...
    • 883 篇 医学技术(可授医学...
    • 659 篇 公共卫生与预防医...
    • 551 篇 中西医结合
    • 498 篇 药学(可授医学、理...
  • 7,552 篇 工学
    • 2,364 篇 材料科学与工程(可...
    • 1,424 篇 化学工程与技术
    • 992 篇 生物医学工程(可授...
    • 863 篇 电子科学与技术(可...
    • 729 篇 环境科学与工程(可...
    • 726 篇 机械工程
    • 720 篇 计算机科学与技术...
    • 708 篇 电气工程
    • 674 篇 力学(可授工学、理...
    • 578 篇 动力工程及工程热...
    • 527 篇 地质资源与地质工...
    • 485 篇 冶金工程
    • 461 篇 水利工程
    • 441 篇 核科学与技术
  • 6,813 篇 理学
    • 2,124 篇 化学
    • 1,957 篇 物理学
    • 1,706 篇 生物学
    • 969 篇 数学
    • 670 篇 天文学
    • 659 篇 地球物理学
    • 630 篇 地质学
    • 517 篇 生态学
  • 1,971 篇 农学
    • 756 篇 作物学
    • 489 篇 农业资源与环境
  • 576 篇 管理学
  • 394 篇 教育学
  • 389 篇 经济学
  • 273 篇 法学
  • 189 篇 文学
  • 89 篇 历史学
  • 65 篇 艺术学
  • 55 篇 哲学
  • 13 篇 军事学

主题

  • 118 篇 患者
  • 73 篇 analysis
  • 64 篇 diabetes
  • 63 篇 mri
  • 61 篇 of
  • 61 篇 ct
  • 54 篇 properties
  • 52 篇 acid
  • 50 篇 and
  • 49 篇 phylogeny
  • 44 篇 health
  • 43 篇 deep learning
  • 42 篇 印度
  • 42 篇 中国
  • 40 篇 corrosion
  • 39 篇 therapy
  • 37 篇 安慰剂对照
  • 36 篇 prevalence
  • 36 篇 plasma
  • 35 篇 magnetic

机构

  • 68 篇 university of mi...
  • 68 篇 department of ph...
  • 67 篇 institute for pa...
  • 67 篇 nikhef p.o.box 4...
  • 67 篇 fysikum stockhol...
  • 67 篇 michigan state u...
  • 67 篇 institut fur the...
  • 67 篇 dept.of physics ...
  • 67 篇 compas group ins...
  • 67 篇 rudolf peierls c...
  • 67 篇 nstitucio catala...
  • 67 篇 school of physic...
  • 67 篇 ludwig-maximilia...
  • 67 篇 cea/saclay dsm/i...
  • 67 篇 department of ph...
  • 66 篇 national researc...
  • 66 篇 department of ph...
  • 66 篇 kobayashi-maskaw...
  • 66 篇 high energy phys...
  • 66 篇 department of ph...

作者

  • 85 篇 h.murayama
  • 85 篇 j.d.jackson
  • 85 篇 g.d'ambrosio
  • 85 篇 m.white
  • 85 篇 p.de jong
  • 84 篇 v.i.belousov
  • 82 篇 v.burkert
  • 78 篇 y.hayato
  • 78 篇 a.v.gritsan
  • 76 篇 a.gurtu
  • 76 篇 m.carena
  • 74 篇 叶鹏
  • 74 篇 a.masoni
  • 69 篇 s.rolli
  • 67 篇 a.d.martin
  • 66 篇 b.heltsley
  • 64 篇 kavli ipmu
  • 63 篇 l.pape
  • 63 篇 s.r.klein
  • 59 篇 d.h.weinberg

语言

  • 11,363 篇 英文
  • 8,146 篇 中文
  • 1 篇 法文
  • 1 篇 其他
检索条件"作者=Todd s.Fredericks.n"
19511 条 记 录,以下是31-40 订阅
排序:
Morphometry and Mineral Content in the seeds and soil of Two species of Argemone L.(Papaveraceae)in the Central Part of the Chihuahuan Desert
收藏 引用
Phyton-International Journal of Experimental Botany 2024年 第2期93卷 371-386页
作者: Perla Patricia Ochoa-García Jaime sánchez-salas Ricardo Trejo-Calzada Jesús JosafathQuezada-Rivera Fabián García-González Unidad Regional Universitaria de ZonasÁridas BermejilloUniversidad Autónoma ChapingoDurango35230México Facultad de Ciencias Biológicas Universidad Juárez del Estado de DurangoGómez PalacioDurango35010México
The genus Argemone L.(Papaveraceae)is found widely distributed in Mexico’s Chihuahuan Desert(CD).some species of this genus are of phytochemical or ethnobotanical *** are inedible plants considered as *** date they h... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Enhancement of coercivity,permeability,and dielectric properties of Co_(0.2)Zn_(0.3)ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites for memory and high frequency devices
收藏 引用
Journal of Rare Earths 2024年 第6期42卷 1128-1135,I0005页
作者: I.sardar M.D.Hossain M.s.sikder M.n.I.Khan M.R.Rahman Physics Discipline Khulna UniversityKhulna9208Bangladesh Department of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh Department ofComputer science and Engineering Northern University of Business&Technology KhulnaKhulna9100Bangladesh Material science Division Atomic Energy CentreDhaka1000Bangladesh
spinel cubic ferrites have huge applications in me mory and high frequency *** the improvement of these modern devices,the magnetic coercivity,permeability,and dielectric properties of a ferrite are the important *** ... 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
nucleoside modified mRnA-lipid nanoparticles as a new delivery platform for the repair of the injured spinal cord
收藏 引用
neural Regeneration Research 2025年 第8期20卷 2311-2312页
作者: Krisztián Pajer Tamás Bellák Antal nógrádi Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary
spinal cord injury and treatment opportunities:The adult mammalian spinal cord has a very limited capacity for spontaneous regeneration due to various intrinsic molecular and cellular *** the spinal cord neurons have ... 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
Landau quantization effects on damping Kawahara solitons in electron–positron–ion plasma in rotating ionized medium
收藏 引用
Communications in Theoretical Physics 2024年 第10期 143-152页
作者: E I El-Awady s Hussain n Akhtar Department of Physics Faculty of Science Port Said University Theoretical Physics Division (TPD) PINSTECH
For the dynamics of three-dimensional electron–positron–ion plasmas, a fluid quantum hydrodynamic model is proposed by considering Landau quantization effects in dense ***–neutral collisions in the presence of the ...
来源: 同方期刊数据库 同方期刊数据库 评论
Dust particle surface potential in an argonhelium plasma using the(r,q)-distribution function
收藏 引用
Communications in Theoretical Physics 2024年 第9期76卷 143-150页
作者: Bahaaudin M Raffah A A Abid Abdullah Khan Amin Esmaeili Yas Al-Hadeethi M n s Qureshi Department of Physics Faculty of Sciences King Abdulaziz University Lithography in Devices Fabrication and Development Research Group Deanship of Scientific ResearchKing Abdulaziz University Joint Laboratory of Plasma Application Technology Institute of Advanced Technology University of Science and Technology of China CAs Key Laboratory of Geospace Environment University of Science and Technology of China Department of Physics Zhejiang Normal University Department of Physics Graduate School of Science Tokyo Metropolitan University Department of Physics GC University
In this paper, the dust particle surface potential for argon-helium plasma is evaluated analytically and numerically in the context of negatively charged dust particles by employing a power-law(r, q)-distribution func... 详细信息
来源: 同方期刊数据库 同方期刊数据库 评论
Compression properties of cost-efficient porous expanded clay reinforced AA7075 syntactic foams fabricated by industrial-oriented die casting technology
收藏 引用
China Foundry 2024年 第1期21卷 60-70页
作者: İsmail Cem Akgün Çağın Bolat Ali Gökşenli Faculty of Mechanical Engineering Istanbul Technical University34437İstanbulTurkey Faculty of Engineering Samsun University55420SamsunTurkey
In today’s manufacturing industries,hard competition between rival firms makes it compulsory for researchers to design lighter and cheaper machine components due to the megatrends of cost-effectiveness and *** this 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
A 63-Year-Old Male with D-Transposition of the Great Arteries Who Had an Early Form of the Arterial switch Operation
收藏 引用
Congenital Heart Disease 2024年 第1期19卷 65-68页
作者: Michael A.Rebolledo Jane s.Yao Jason n.Johnson Umar s.Boston Benjamin R.Waller III Division of Pediatric Cardiology Department of PediatricsThe University of Tennessee Health Science CenterThe Heart InstituteLe Bonheur Children’s HospitalMemphisUSA College of Medicine The University of Tennessee Health ScienceMemphisUSA Division of Pediatric Cardiothoracic surgery Department of SurgeryThe University of Tennessee Health Science CenterHeart InstituteLe Bonheur Children’s HospitalMemphisUSA
We describe a 63-year-old male who appears to have undergone an early form of the arterial switch operation for D-transposition of the great arteries performed in the *** review the clinical and imaging data that supp... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Enhanced termination of zinc and cadmium ions from wastewater employing plain and chitosan-modified mxenes: synthesis, characterization,and adsorption performance
收藏 引用
Green Chemical Engineering 2024年 第3期5卷 339-347页
作者: njood R.Azeez suhaib s.salih Mohammed Kadhom Harith n.Mohammed Tushar K.Ghosh Department of Chemical Engineering College of Engineering University of Tikrit Department of Environmental science College of Energy and Environmental Science Al-Karkh University of Science Department of nuclear science & Engineering Institute University of Missouri-Columbia
Zinc and cadmium pollutants cause a significant environmental effect that cannot be ignored. Due to their considerable amount in an aqueous environment, industries are seeking suitable adsorbents that are environmenta... 详细信息
来源: 评论
Measurement of yields and angular distributions ofγ-quanta from the interaction of 14.1 MeV neutrons with oxygen,phosphorus,and sulfur
收藏 引用
Chinese Physics C 2024年 第3期48卷 79-92页
作者: D.n.Grozdanov n.A.Fedorov s.B.Dabylova Yu.n.Kopatch I.n.Ruskov V.R.skoy T.Yu.Tretyakova C.Hramco P.I.Kharlamov G.V.Pampushik P.G.Filonchik A.V.Andreev Joint Institute for nuclear Research(JInR) DubnaRussia Institute for nuclear Research and nuclear Energy Bulgarian Academy of SciencesSofiaBulgaria Faculty of Physics Lomonosov Moscow State UniversityMoscowRussia L.n.Gumilyov Eurasian national University AstanaKazakhstan skobeltsyn Institute of nuclear Physics Moscow State UniversityMoscowRussia Institute of Chemistry of Moldova ChisinauRepublic of Moldova Moscow Institute of Physics and Technology MoscowRussia
A study of the inelastic scattering of neutrons with an energy of 14.1 MeV on the nuclei of oxygen,phosphorus,and sulfur was performed at the TAnGRA facility at JInR(Dubna).The experiment aimed to refine existing data... 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
sodium nitroprusside as a signal molecule for up-regulating membrane characteristics, antioxidant defense system to improve flax productivity under water stress
收藏 引用
Oil Crop science 2024年 第3期9卷 160-169页
作者: Al-Ashkar n.M. Bakry B.A. El-Bassiouny H.M.s. Abdallah M.M.s. sadak M.s. Botany Department Agricultural and Biological Research Institute National Research Centre 33 El Bohouth Street P.O. 12622 Dokki Giza Egypt Field Crops Research Department Agricultural and Biological Research Institute National Research Centre 33 El Bohouth Street P.O. 12622 Dokki Giza Egypt
Water stress is a critical environmental adversity that significantly impacts the growth, development, and yield of flax plants. In this study, flax seeds were cultivated under different water irrigation requirements ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论