咨询与建议

限定检索结果

文献类型

  • 80,997 篇 期刊文献
  • 11,807 篇 会议
  • 2,896 册 图书
  • 125 篇 学位论文
  • 12 篇 报纸

馆藏范围

  • 94,555 篇 电子文献
  • 1,352 种 纸本馆藏

日期分布

学科分类号

  • 37,727 篇 工学
    • 6,398 篇 材料科学与工程(可...
    • 4,707 篇 化学工程与技术
    • 2,968 篇 电子科学与技术(可...
    • 2,808 篇 机械工程
    • 2,801 篇 控制科学与工程
    • 2,718 篇 生物医学工程(可授...
    • 2,704 篇 计算机科学与技术...
    • 2,104 篇 动力工程及工程热...
    • 2,100 篇 仪器科学与技术
    • 1,624 篇 软件工程
    • 1,571 篇 地质资源与地质工...
    • 1,529 篇 水利工程
    • 1,399 篇 电气工程
  • 26,784 篇 医学
    • 21,448 篇 临床医学
    • 2,891 篇 医学技术(可授医学...
    • 2,429 篇 基础医学(可授医学...
    • 2,119 篇 中西医结合
    • 1,663 篇 公共卫生与预防医...
    • 1,372 篇 药学(可授医学、理...
  • 19,055 篇 理学
    • 3,682 篇 数学
    • 3,493 篇 化学
    • 3,104 篇 物理学
    • 2,466 篇 生物学
    • 1,775 篇 系统科学
    • 1,564 篇 地质学
  • 7,972 篇 农学
    • 2,089 篇 作物学
    • 1,504 篇 畜牧学
  • 4,774 篇 教育学
    • 3,186 篇 体育学
  • 4,604 篇 管理学
    • 2,372 篇 管理科学与工程(可...
  • 2,889 篇 经济学
    • 2,557 篇 应用经济学
  • 1,512 篇 法学
  • 1,376 篇 文学
  • 596 篇 历史学
  • 524 篇 艺术学
  • 487 篇 哲学
  • 252 篇 军事学

主题

  • 625 篇 ct
  • 503 篇 mri
  • 426 篇 of
  • 350 篇 美国
  • 339 篇 患者
  • 308 篇 病人
  • 301 篇 and
  • 250 篇 中国
  • 248 篇 mr
  • 224 篇 analysis
  • 195 篇 应用
  • 159 篇 治疗
  • 155 篇 cancer
  • 142 篇 model
  • 142 篇 in
  • 139 篇 北美洲
  • 127 篇 acid
  • 125 篇 设计
  • 124 篇 诊断
  • 113 篇 disease

机构

  • 433 篇 深圳大学
  • 252 篇 山东大学
  • 147 篇 北京大学
  • 123 篇 西南民族大学
  • 104 篇 南京大学
  • 89 篇 四川大学
  • 75 篇 同济医科大学附属...
  • 75 篇 浙江大学
  • 73 篇 华中科技大学
  • 73 篇 西安交通大学
  • 69 篇 香港理工大学
  • 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...
  • 67 篇 institut fur the...
  • 67 篇 dept.of physics ...
  • 67 篇 compas group ins...
  • 67 篇 rudolf peierls c...

作者

  • 663 篇 p.r.china
  • 195 篇 叶鹏
  • 150 篇 p. r. china
  • 95 篇 刘莉
  • 85 篇 h.murayama
  • 85 篇 j.d.jackson
  • 85 篇 g.d'ambrosio
  • 85 篇 m.white
  • 76 篇 china
  • 70 篇 p.de jong
  • 60 篇 p.r. china
  • 59 篇 beijing
  • 57 篇 jocelyn richards
  • 56 篇 郭俊
  • 53 篇 朱国栋
  • 49 篇 shanghai
  • 49 篇 王铮
  • 38 篇 v.i.belousov
  • 37 篇 崔荣
  • 33 篇 tsinghua univers...

语言

  • 54,397 篇 中文
  • 41,429 篇 英文
  • 1 篇 日文
  • 1 篇 其他
检索条件"作者=P.Richards.n"
95837 条 记 录,以下是1-10 订阅
排序:
Development of surrogate-optimization models for a novel transcritical power cycle integrated with a small modular reactor
收藏 引用
Energy and AI 2024年 第1期15卷 15-25页
作者: Yili Zhang Jacob Bryan Geordie richards Hailei Wang Department of Mechanical&Aerospace Engineering Utah State UniversityLoganUT 84322USA
In recent years,various types of surrogate optimization models have been proposed to reduce the computational time and to improve the emulation *** this study,by leveraging an Ann surrogate model developed earlier,a c... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Stochastic Ranking Improved Teaching-Learning and Adaptive Grasshopper Optimization Algorithm-Based Clustering Scheme for Augmenting network Lifetime in WSns
收藏 引用
China Communications 2024年 第9期21卷 159-178页
作者: n Tamilarasan SB Lenin p Mukunthan nC Sendhilkumar Department of Electronics and Communications Engineering Sri Indu College of Engineering and TechnologyHyderabadTelanganaIndia Department of Electronics and Communications Engineering Sri Manakula Vinayagar Engineering CollegePondicherryIndia
In Wireless Sensor networks(WSns),Clustering process is widely utilized for increasing the lifespan with sustained energy stability during data *** clustering protocols were devised for extending network lifetime,but ... 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
Calibration of the DEM sliding friction and rolling friction parameters of a cohesionless bulk material
收藏 引用
particuology 2024年 第9期92卷 126-139页
作者: Jonatan Marín pérez Tugrul Comlekci Yevgen Gorash Donald MacKenzie University of Strathclyde 75 Montrose StreetG11XJGlasgowUnited Kingdom
The discrete element method(DEM)has become a valuable tool for understanding the mechanical behaviour of granular assemblies,however,the accuracy of the DEM simulations depends on several interaction parameters such a... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
In-situ study of the microstructure evolution during tension of a Mg-Y-Zn-Al alloy processed by rapidly solidified ribbon consolidation technique
收藏 引用
Journal of Magnesium and Alloys 2024年 第5期12卷 2024-2040页
作者: Jeno Gubicza Kristián Máthis péter nagy péter Jenei Zoltán Hegedus Andrea Farkas Jozef Vesely Shin-ichi Inoue Daria Drozdenko Yoshihito Kawamura Department of Materials physics Faculty of ScienceEotvos Loránd UniversityPázmány P.sétány 1/ABudapest H-1117Hungary Department of physics of Materials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116 Praha 2Czech Republic Deutsches Elektronen-Synchrotron DESY Notkestr.85Hamburg 22603Germany Magnesium Research Center Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan
Mg-Y-Zn-Al alloys processed by rapidly solidified ribbon consolidation(RSRC)technique exhibit an exceptional mechanical performance indicating promising application *** material has a bimodal microstructure consisting... 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
Effects of site preparation methods on soil physical properties and outplanting success of coniferous seedlings in boreal forests
收藏 引用
Journal of Forestry Research 2024年 第2期35卷 70-80页
作者: Aleksey S.Ilintsev Elena n.nakvasina Alexander p.Bogdanov northern Research Institute of Forestry 13 Nikitova Str.Arkhangelsk 163062Russian Federation Department of Silviculture and Forest Management Northern(Arctic)Federal University Named After M.V.LomonosovSevernoy Dviny Emb.17Arkhangelsk 163002Russian Federation
This study assessed the effect of patch scarification and mounding on the physical properties of the root layer and the success of tree planting in various types of *** study was conducted on 12 forest sites in taiga ... 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
RBC aggregation,deformation and adhesion to endothelium:Role of nitric oxide derived from L-Arginine and sodium nitroprusside
收藏 引用
Journal of Innovative Optical Health Sciences 2024年 第5期17卷 53-65页
作者: M.K.Maksimov p.B.Ermolinskiy O.n.Scheglovitova n.n.Sklyankina A.V.Muravyov A.E.Lugovtsov A.V.priezzhev Faculty of physics M.V.Lomonosov Moscow State University bld.1subbuilding.2Leninskie goryMoscow 11991Russia n.F.Gamaleya national Research Center for Epidemiology and Microbiology 18 Gamaleya StreetMoscow 123098Russia K.D.Ushinsky Yaroslavl State pedagogical University 108/1 Respublikanskaya StreetYaroslavl 150000Russia
Red blood cells(RBCs)are the most abundant human blood *** aggregation and deformation strongly determine blood viscosity which impacts hemorheology and *** turn,RBC properties depend on di®erent endogenous and exogen... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Stability Analysis of DC Microgrid Clusters Based on Step-by-step System Matrix Building Algorithm
收藏 引用
Journal of Modern power Systems and Clean Energy 2024年 第3期12卷 900-912页
作者: K.Jithin n.Mayadevi R.Hari Kumar V.p.Mini the Department of Electrical Engineering College of Engineering TrivandrumAPJ Abdul Kalam Technological University(APJAKTU)ThiruvananthapuramIndia
DC microgrids(DCMGs)are made up of a network of sources and loads that are connected by a number of power electronic converters(pECs).The increase in the number of these pECs instigates major concerns in system *** in... 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
Wettability,reactivity,and interface structure in Mg/ni system
收藏 引用
Journal of Magnesium and Alloys 2024年 第2期12卷 659-672页
作者: S.Terlicka n.Sobczak Ł.Maj p.Darłak J.J.Sobczak Institute of Metallurgy and Materials Science Polish Academy of Sciences25 Reymonta Str.KrakowPoland Faculty of Foundry Engineering AGH University23 Reymonta Str.KrakowPoland
The sessile drop method was applied to the experimental investigation of the wetting and spreading behaviors of liquid Mg drops on pure ni *** comparison,the experiments were performed in two variants:(1)using the Cap... 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
The interaction of the structure-directing agent with the zeolite framework determines germanium distribution in SCM-15 germanosilicate
收藏 引用
Frontiers of Chemical Science and Engineering 2024年 第5期18卷 105-114页
作者: Stoyan p.Gramatikov petko St.petkov Zhendong Wang Weimin Yang Georgi n.Vayssilov Faculty of Chemistry and pharmacy University of Sofia1126 SofiaBulgaria State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Sinopec Shanghai Research Institute of Petrochemical Technology Co.Ltd.Shanghai 201208China
We report results from computational modeling of the relative stability of germanosilicate SCM-15 structure due to different distribution of germanium heteroatoms in the double four-member rings(D4Rs)of the framework ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Optimum profiles of Endwall Contouring for Enhanced net Heat Flux Reduction and Aerodynamic performance
收藏 引用
Journal of Harbin Institute of Technology(new Series) 2024年 第2期31卷 80-92页
作者: Arjun K S Tide p S Biju n Division of Mechanical Engineering School of EngineeringCochin University of Science&TechnologyKalamassery 682022India
Successfully utilized non-axisymmetric endwalls to enhance turbine efficiencies(aerodynamic and turbine inlet temperatures)by controlling the characteristics of the secondary flow in a blade *** is accomplished by ste... 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