咨询与建议

限定检索结果

文献类型

  • 9,315 篇 期刊文献
  • 465 篇 会议

馆藏范围

  • 9,780 篇 电子文献
  • 0 种 纸本馆藏

日期分布

学科分类号

  • 3,715 篇 工学
    • 695 篇 材料科学与工程(可...
    • 594 篇 化学工程与技术
    • 438 篇 计算机科学与技术...
    • 313 篇 电子科学与技术(可...
    • 260 篇 软件工程
    • 240 篇 机械工程
    • 214 篇 控制科学与工程
    • 212 篇 电气工程
    • 199 篇 仪器科学与技术
    • 177 篇 地质资源与地质工...
    • 165 篇 环境科学与工程(可...
    • 148 篇 力学(可授工学、理...
    • 141 篇 水利工程
    • 140 篇 信息与通信工程
  • 2,978 篇 理学
    • 557 篇 数学
    • 449 篇 生物学
    • 445 篇 物理学
    • 422 篇 化学
    • 371 篇 地质学
    • 214 篇 大气科学
    • 145 篇 生态学
  • 2,832 篇 医学
    • 2,075 篇 临床医学
    • 236 篇 公共卫生与预防医...
    • 203 篇 药学(可授医学、理...
    • 199 篇 基础医学(可授医学...
    • 189 篇 中西医结合
  • 995 篇 农学
    • 297 篇 作物学
    • 203 篇 农业资源与环境
  • 480 篇 管理学
    • 300 篇 管理科学与工程(可...
  • 241 篇 经济学
    • 207 篇 应用经济学
  • 133 篇 教育学
  • 124 篇 法学
  • 95 篇 文学
  • 55 篇 艺术学
  • 26 篇 哲学
  • 21 篇 军事学
  • 20 篇 历史学

主题

  • 64 篇 中国
  • 59 篇 cancer
  • 41 篇 deep learning
  • 31 篇 covid-19
  • 31 篇 analysis
  • 31 篇 ho
  • 30 篇 system
  • 26 篇 be
  • 26 篇 ta
  • 24 篇 of
  • 22 篇 应用
  • 21 篇 than
  • 20 篇 ba
  • 20 篇 zircon
  • 19 篇 temperature
  • 19 篇 dna
  • 18 篇 high
  • 18 篇 antioxidant
  • 18 篇 mortality
  • 18 篇 liver

机构

  • 129 篇 u.s.a.
  • 69 篇 university of mi...
  • 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 michigan state u...
  • 67 篇 NOT FOUND
  • 66 篇 national researc...
  • 66 篇 institut fur the...
  • 66 篇 dept.of physics ...
  • 66 篇 compas group ins...
  • 66 篇 rudolf peierls c...
  • 66 篇 department of ph...
  • 66 篇 department of ph...
  • 65 篇 nstitucio catala...
  • 65 篇 cern european or...
  • 65 篇 department of ph...
  • 65 篇 school of physic...

作者

  • 87 篇 v.i.belousov
  • 87 篇 j.beringer
  • 86 篇 f.krauss
  • 86 篇 g.weiglein
  • 86 篇 h.murayama
  • 86 篇 j.parsons
  • 86 篇 j.d.jackson
  • 86 篇 g.d'ambrosio
  • 86 篇 r.s.chivukula
  • 86 篇 y.kwon
  • 86 篇 m.white
  • 86 篇 m.drees
  • 86 篇 p.de jong
  • 85 篇 o.dahl
  • 85 篇 b.foster
  • 85 篇 g.rybka
  • 85 篇 a.ringwald
  • 85 篇 m.grnewald
  • 85 篇 s.raby
  • 85 篇 v.burkert

语言

  • 6,677 篇 英文
  • 3,103 篇 中文
检索条件"机构=U.S.Dept.Agriculture"
9780 条 记 录,以下是1-10 订阅
排序:
EMDs 3.0:A modeling framework for coping with complexity in environmental assessment and planning
收藏 引用
science China(Technological sciences) 2006年 第z1期49卷 63-75页
作者: Keith M.Reynolds u.s.dept.agriculture Forest ServicePacific Northwest Research Station3200 SW Jefferson WayCorvallisOR 97331USA
The Ecosystem Management Decision support (EMDs) system is an application framework for knowledge-based decision support of ecological assessments at any geographic scale. The system integrates state-of-the-art geogra... 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
Woody biochar potential for abandoned mine land restoration in the u.s.:a review
收藏 引用
Biochar 2021年 第1期3卷 7-22页
作者: Carlos Rodriguez‑Franco Deborah s.Page‑Dumroese u.s.Department of agriculture Forest ServiceWashington Office.Research and Development20114th StreetS.W.2 NWWashingtonDC 20250USA u.s.Department of agriculture Forest ServiceRocky Mountain Research Station1221 S.MainMoscowID 83843USA
There are thousands of abandoned mine land(AML)sites in the *** need to be restored to reduce wind and water erosion,provide wildlife forage,shade streams,and improve *** created from woody biomass that would normally... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Translational machinery and translation regulation in axon regeneration
收藏 引用
Neural Regeneration Research 2025年 第5期20卷 1392-1394页
作者: Homaira Nawabi stephane Belin univ.Grenoble Alpes InsermU1216Grenoble Institut NeurosciencesGrenobleFrance
Over the centuries,the regeneration field has been puzzled by the dual response of the central nervous system(CNs-brain,spinal cord,cranial nervesⅠandⅡ)and the peripheral nervous system(PNs that refers to all the ne... 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
Central role of altered phosphodiesterase 2-dependent signaling in the pathophysiology of cognition-based brain disorders
收藏 引用
Neural Regeneration Research 2025年 第8期20卷 2302-2303页
作者: Asma Boulksibat Alessandra Tempio Barbara Bardoni Institut de Pharmacologie Moléculaire et Cellulaire CNRS UMR7275Inserm U1323ValbonneFrance
The second messengers 3',5'-cyclic adenosine monophosphate(cAMP)and 3',5'-cyclic guanosine monophosphate(cGMP)modulate molecular pathways that are involved in a large variety of cellular *** the brain,these processes ... 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
Flow near a model spur dike with a fixed scoured bed
收藏 引用
International Journal of sediment Research 2013年 第3期28卷 349-357页
作者: Roger KuHNLE Carlos ALONsO National sedimentation Laboratory U.S.Department of AgricultureAgricultural Research Service
Three-dimensional flow velocities were measured using an acoustic Doppler velocimeter at a closely spaced grid over a fixed scoured bed with a submerged spur ***-dimensional flow velocities were measured at 3,484 posi... 详细信息
来源: 同方期刊数据库 同方期刊数据库 评论
sulfolane‑Based Flame‑Retardant Electrolyte for High‑Voltage sodium‑Ion Batteries
收藏 引用
Nano-Micro Letters 2025年 第2期17卷 498-516页
作者: Xuanlong He Jie Peng Qingyun Lin Meng Li Weibin Chen Pei Liu Tao Huang Zhencheng Huang Yuying Liu Jiaojiao Deng shenghua Ye Xuming Yang Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Biwei Xiao Jiangtao Hu Qianling Zhang Graphene Composite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Center of Electron Microscopy State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINM(Guangdong)Research Institute for Advanced Materials and Technology FoshanGuangdong 528051People’s Republic of China College of Energy Engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China school of Materials science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China shenzhen Eigen-Equation Graphene Technology Co.Ltd Shenzhen 518000People’s Republic of China
sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an uns... 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
Evolving carbon dioxide emission rate intensities of coal-fired power plant on u.s. electricity operating systems
收藏 引用
Journal of Modern Power systems and Clean Energy 2018年 第6期6卷 1103-1112页
作者: Robert Kennedy sMITH u.s. Department of Energy Office of Fossil Energy
For many years, coal-fired power plant generation comprised the largest share of electricity in the *** sector. While natural gas plants now constitute a greater portion of the total, coal is projected to remain a shr... 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
Metabolomic analysis of longissimus from underperforming piglets relative to piglets with normal preweaning growth
收藏 引用
Journal of Animal science and Biotechnology 2018年 第3期9卷 630-638页
作者: Timothy G.Ramsay Margo J.stoll Amy E.shannon Le Ann Blomberg Animal Biosciences and Biotechnology Laboratory U.S.Department of Agriculture Agricultural Research Service
Background: Recent increases in intra-litter variability in weaning weight have raised swine production costs. A contributor to this variability is the normal birth weight pig that grows at a slower rate than litterma... 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
spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for ultra‑Thin Electromagnetic Wave Absorber
收藏 引用
Nano-Micro Letters 2025年 第1期17卷 424-438页
作者: Honghan Wang Xinyu Xiao shangru Zhai Chuang Xue Guangping Zheng Deqing Zhang Renchao Che Junye Cheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefinerySchool of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034People’s Republic of China school of Life science and Biotechnology Dalian University of TechnologyDalian 116024People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China school of Materials science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Department of Materials science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China
The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engin... 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
Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays
收藏 引用
Nano-Micro Letters 2025年 第3期17卷 297-309页
作者: Chang Gu Guojian Yang Wenxuan Wang Aiyan shi Wenjuan Fang Lei Qian Xiaofei Hu Ting Zhang Chaoyu Xiang Yu‑Mo Zhang Laboratory of Optoelectronic Information Technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China university of science and Technology of China Hefei 230026People’s Republic of China state Key Lab of supramolecular structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China
High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental sta... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论