咨询与建议

限定检索结果

文献类型

  • 11,361 篇 期刊文献
  • 6,914 篇 学位论文
  • 472 篇 会议
  • 45 册 图书
  • 5 篇 科技报告
  • 4 篇 成果
  • 3 件 标准

馆藏范围

  • 18,785 篇 电子文献
  • 19 种 纸本馆藏

日期分布

学科分类号

  • 4,844 篇 工学
    • 1,670 篇 材料科学与工程(可...
    • 792 篇 计算机科学与技术...
    • 600 篇 软件工程
    • 589 篇 化学工程与技术
    • 443 篇 电气工程
    • 360 篇 环境科学与工程(可...
    • 301 篇 冶金工程
    • 293 篇 机械工程
    • 236 篇 生物工程
    • 198 篇 电子科学与技术(可...
    • 154 篇 仪器科学与技术
    • 150 篇 信息与通信工程
    • 123 篇 生物医学工程(可授...
  • 4,665 篇 理学
    • 3,126 篇 生物学
    • 844 篇 化学
    • 523 篇 物理学
    • 147 篇 数学
    • 126 篇 生态学
    • 111 篇 地球物理学
  • 3,644 篇 医学
    • 2,061 篇 临床医学
    • 1,010 篇 基础医学(可授医学...
    • 485 篇 药学(可授医学、理...
    • 447 篇 公共卫生与预防医...
    • 220 篇 中西医结合
    • 138 篇 医学技术(可授医学...
  • 967 篇 农学
    • 274 篇 作物学
    • 130 篇 农业资源与环境
  • 413 篇 管理学
    • 276 篇 管理科学与工程(可...
  • 202 篇 教育学
    • 122 篇 教育学
  • 200 篇 经济学
    • 139 篇 应用经济学
  • 127 篇 法学
  • 82 篇 文学
  • 47 篇 历史学
  • 44 篇 哲学
  • 40 篇 艺术学
  • 2 篇 军事学

主题

  • 18,804 篇 c
  • 7,360 篇 a
  • 7,263 篇 n
  • 6,982 篇 e
  • 6,828 篇 i
  • 6,824 篇 s
  • 6,778 篇 o
  • 6,549 篇 l
  • 5,916 篇 ,
  • 5,846 篇 t
  • 5,455 篇 r
  • 4,634 篇 d
  • 4,146 篇 m
  • 3,749 篇 u
  • 3,634 篇 p
  • 3,433 篇 g
  • 3,367 篇 h
  • 2,518 篇 b
  • 2,286 篇 y
  • 2,034 篇 v

机构

  • 147 篇 brno university ...
  • 136 篇 university of ca...
  • 117 篇 harvard universi...
  • 112 篇 state university...
  • 106 篇 the university o...
  • 96 篇 capella universi...
  • 93 篇 columbia univers...
  • 92 篇 yale university
  • 85 篇 the george washi...
  • 84 篇 university of il...
  • 82 篇 indiana universi...
  • 75 篇 university of ph...
  • 69 篇 princeton univer...
  • 68 篇 the university o...
  • 67 篇 ohio state unive...
  • 67 篇 university of ca...
  • 67 篇 university of ne...
  • 61 篇 university of ke...
  • 61 篇 the university o...
  • 59 篇 the university o...

作者

  • 34 篇 chopin j
  • 18 篇 markham kr
  • 16 篇 bouillant ml
  • 15 篇 besson e
  • 13 篇 li yang
  • 13 篇 wang dayong
  • 12 篇 li hejun
  • 12 篇 zhang yulei
  • 11 篇 li longbiao
  • 10 篇 erman je
  • 10 篇 li li
  • 10 篇 liu yang
  • 10 篇 mabry tj
  • 9 篇 wang jing
  • 9 篇 yang yang
  • 8 篇 shingo nakamoto
  • 8 篇 nicola coppola
  • 8 篇 cheng laifei
  • 8 篇 yu ca
  • 8 篇 esmann m

语言

  • 14,026 篇 英文
  • 2,852 篇 中文
  • 1,874 篇 其他
  • 18 篇 荷兰文
  • 14 篇 法文
  • 13 篇 德文
  • 8 篇 日文
  • 5 篇 西班牙文
  • 3 篇 俄文
  • 1 篇 波兰文
  • 1 篇 塞尔维亚文
  • 1 篇 土耳其文
检索条件""
18804 条 记 录,以下是4651-4660 订阅
排序:
Adsorption behaviour of methylene blue on carbon nanoparticles
收藏 引用
MIcRO & NANO LETTERS 2012年 第10期7卷 1060-1063页
作者: Yang, Sheng-Tao Luo, Jianbin Zhou, Qinghan Wan, Jing Ma, chen Liao, Rong Southwest Univ Nationalities Coll Chem & Environm Protect Engn Chengdu 610041 Peoples R China
Nanoadsorbents have been regarded as promising materials for water treatment. The adsorption behaviour determines the applications of nanoadsorbents. In this reported work, the authors studied the adsorption behaviour... 详细信息
来源: 评论
Biomass-derived porous carbon-protected silver nanoflowers construction of long-term stable SERS substrate for ultrasensitive detection of organic pollution
收藏 引用
JOURNAL OF MATERIALS RESEARcH 2023年 第2期38卷 519-531页
作者: Zhu, Sijia Wang, Qing Yang, Jinhui Li, Hongmei Gao, Ningning Zhong, Furu Fu, Jihong Tang, Jun Wang, Tao Xinjiang Univ Phys & Chem Anal Ctr Urumqi 830046 Peoples R China Xinjiang Univ Coll Phys & Technol Urumqi 830046 Peoples R China Zunyi Normal Coll Sch Phys & Elect Sci Zunyi 563006 Guizhou Peoples R China Xinjiang Univ Coll Chem Engn Urumqi 830046 Peoples R China
Biomass-derived porous carbon (Pc) loaded with precious metals have a synergistic enhancement effect on surface-enhanced Raman scattering (SERS). In this paper, Pc containing various functional groups and large specif... 详细信息
来源: 评论
Energetics of graphene origami and their "spatial resolution"
收藏 引用
MRS BULLETIN 2021年 第6期46卷 481-486页
作者: Yang, Yang Zhang, Zhuhua Hu, Zhili Penev, Evgeni S. Yakobson, Boris I. Rice Univ Dept Mat Sci & NanoEngn Houston TX 77005 USA Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct Key Lab Intelligent Nano Mat & Devices Minist EducInst Nano Sci Nanjing Peoples R China
The extreme thinness of graphene combined with its tensile strength made it a material appealing for discussing and even making complex cut-kirigami or folded-only origami. In the case of origami, its stability is mai... 详细信息
来源: 评论
Application of electrochemical techniques for the control of cracks and steel corrosion in concrete
收藏 引用
JOURNAL OF APPLIED ELEcTROcHEMISTRY 2002年 第6期32卷 635-639页
作者: Ryu, JS Otsuki, N Univ Calif Berkeley Dept Civil & Environm Engn Berkeley CA 94720 USA Tokyo Inst Technol Dept Int Dev Engn Tokyo 1528552 Japan
Electrochemical techniques are becoming increasingly popular as a means of rehabilitating deteriorated reinforced concrete. In this paper we explore the possibility of using an electrodeposition technique for repairs ... 详细信息
来源: 评论
Effects of rotational restraints on the thermal buckling of carbon nanotube
收藏 引用
MIcRO & NANO LETTERS 2019年 第2期14卷 158-162页
作者: Yayli, Mustafa Ozgur Bursa Uludag Univ Dept Civil Engn Fac Engn 16059 Gorukle Campus Bursa Turkey
The thermal buckling response of nanotubes with rotational restraints is investigated using a Timoshenko beam model with non-local elasticity theory. Two trigonometric (Fourier) series are selected to analyse the ther... 详细信息
来源: 评论
Influence of carbon black with different concentration on dynamic properties and heat buildup of semi-efficient natural rubber composites
收藏 引用
MIcRO & NANO LETTERS 2016年 第7期11卷 402-406页
作者: Zhang, Huan Zhang, Zhiyi Zhao, Guizhe Liu, Yaqing North Univ China Shanxi Key Lab Nano Funct Composite Mat Taiyuan 030051 Peoples R China North Univ China Coll Mat Sci & Engn Taiyuan 030051 Peoples R China
High abrasion furnace black (HAF) filler has long been recognised as reinforcing filler, but the impact of concentration on dynamic mechanics performance and heat buildup of vulcanisates is rarely reported. Therefore,... 详细信息
来源: 评论
Preparation of fluorescent carbon dots from peat for Fe3+ sensing and cellular imaging
收藏 引用
MIcRO & NANO LETTERS 2020年 第2期15卷 86-89页
作者: Han, Shuai Wu, Baoshuang Wang, Hong Wang, Guangshuo Yang, Jiajia He, Leqin Wei, Fangfang Qin, Shenjun Hebei Univ Engn Coll Mat Sci & Engn Handan 056038 Peoples R China Hebei Univ Engn Key Lab Resource Explorat Res Hebei Prov Handan 056038 Peoples R China First Hosp Hebei Shijiazhuang City Dept Geriatr 1 Shijiazhuang 050011 Hebei Peoples R China
Novel fluorescent carbon dots (cDs) were fabricated using the hydrothermal carbonisation method by peat, which is a very abundant and low-cost natural material in the world. The transmission electron microscopy images... 详细信息
来源: 评论
Superior lithium storage performance of polyacrylonitrile-modified NASIcON structure Na3V2(PO4)3 materials
收藏 引用
JOURNAL OF THE AUSTRALIAN cERAMIc SOcIETY 2020年 第3期56卷 1073-1077页
作者: Jia, Maomao Su, Zhi Tian, Hualing Xinjiang Normal Univ Coll Chem & Chem Engn Urumqi 830054 Xinjiang Peoples R China
Nanoparticle Na3V2(PO4)(3)/c materials with different polyacrylonitrile contents can be successfully synthesized using precipitation method. As an energy storage material used in the production of lithium batteries wh... 详细信息
来源: 评论
Effect of preparation methods of graphene oxide on permeability of free-standing membranes against polar and nonpolar species
收藏 引用
SOFT MATERIALS 2021年 第1期19卷 24-39页
作者: Zomorodkia, Ali Asghar Bazgir, Saeed Zaarei, Davood Gorji, Mohsen Ardjmand, Mehdi Islamic Azad Univ Sci & Res Branch Dept Chem Engn Tehran Iran Islamic Azad Univ South Tehran Branch Dept Polymer Engn Tehran Iran Amirkabir Univ Technol NTRC Tehran Iran Islamic Azad Univ South Tehran Branch Dept Chem Engn Tehran Iran
In this study, graphene oxide (GO) was synthesized using Hummers, modified Hummers and improved Hummers methods, and then freestanding membranes were prepared based on these materials. Effects of different GO preparat... 详细信息
来源: 评论
Prediction of gas product yield from packaging waste pyrolysis: support vector and Gaussian process regression models
收藏 引用
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ScIENcE AND TEcHNOLOGY 2023年 第1期20卷 461-476页
作者: Yapici, E. Akgun, H. Ozkan, K. Gunkaya, Z. Ozkan, A. Banar, M. Eskisehir Tech Univ Fac Engn Dept Environm Engn TR-26555 Eskisehir Turkey Eskisehir Osmangazi Univ Fac Engn & Architecture Dept Comp Engn Eskisehir Turkey
The pyrolysis process enables the transformation of plastic waste into products such as oil, solid residue, and gas at temperatures of around 300-900 degrees c by thermal decomposition. conversion of such waste into v... 详细信息
来源: 评论