咨询与建议

限定检索结果

文献类型

  • 508,318 篇 期刊文献
  • 3,846 篇 会议
  • 2 篇 学位论文

馆藏范围

  • 512,166 篇 电子文献
  • 0 种 纸本馆藏

日期分布

学科分类号

  • 207,390 篇 工学
    • 29,048 篇 材料科学与工程(可...
    • 28,018 篇 化学工程与技术
    • 18,290 篇 机械工程
    • 14,821 篇 计算机科学与技术...
    • 11,637 篇 软件工程
    • 11,078 篇 电气工程
    • 10,637 篇 食品科学与工程(可...
    • 10,406 篇 仪器科学与技术
    • 10,040 篇 生物医学工程(可授...
    • 9,807 篇 环境科学与工程(可...
    • 9,223 篇 电子科学与技术(可...
    • 8,792 篇 动力工程及工程热...
    • 8,742 篇 生物工程
  • 192,489 篇 医学
    • 104,543 篇 临床医学
    • 28,610 篇 中西医结合
    • 20,456 篇 公共卫生与预防医...
    • 19,910 篇 药学(可授医学、理...
    • 16,742 篇 中药学(可授医学、...
    • 14,638 篇 基础医学(可授医学...
    • 13,051 篇 医学技术(可授医学...
    • 9,561 篇 护理学(可授医学、...
    • 9,270 篇 中医学
  • 66,436 篇 理学
    • 16,749 篇 化学
    • 16,174 篇 生物学
  • 64,087 篇 农学
    • 18,309 篇 作物学
    • 11,914 篇 农业资源与环境
  • 29,295 篇 管理学
    • 11,394 篇 管理科学与工程(可...
    • 11,093 篇 公共管理
  • 19,817 篇 教育学
    • 15,520 篇 教育学
  • 10,119 篇 经济学
    • 8,894 篇 应用经济学
  • 6,569 篇 法学
  • 5,478 篇 文学
  • 2,731 篇 艺术学
  • 2,065 篇 历史学
  • 1,247 篇 军事学
  • 1,200 篇 哲学

主题

  • 3,641 篇 影响因素
  • 3,002 篇 预后
  • 2,992 篇 儿童
  • 2,658 篇 大鼠
  • 2,510 篇 数值模拟
  • 2,460 篇 产量
  • 2,387 篇 危险因素
  • 1,873 篇 诊断
  • 1,834 篇 应用
  • 1,784 篇 糖尿病
  • 1,721 篇 磁共振成像
  • 1,701 篇 细胞凋亡
  • 1,540 篇 力学性能
  • 1,522 篇 治疗
  • 1,330 篇 护理
  • 1,304 篇 凋亡
  • 1,287 篇 合成
  • 1,266 篇 高效液相色谱法
  • 1,236 篇 高血压
  • 1,234 篇 教学改革

机构

  • 3,103 篇 上海交通大学
  • 2,988 篇 北京大学
  • 2,885 篇 中国科学院大学
  • 2,879 篇 吉林大学
  • 2,541 篇 西北农林科技大学
  • 2,519 篇 北京中医药大学
  • 2,486 篇 浙江大学
  • 2,477 篇 四川大学
  • 2,362 篇 清华大学
  • 2,298 篇 西安交通大学
  • 2,235 篇 天津大学
  • 2,197 篇 中国农业大学
  • 2,134 篇 中南大学
  • 2,060 篇 中国矿业大学
  • 2,031 篇 山东大学
  • 2,005 篇 中国地质大学
  • 1,989 篇 解放军总医院
  • 1,903 篇 西北工业大学
  • 1,895 篇 郑州大学
  • 1,879 篇 华中科技大学

作者

  • 9,544 篇 张艳
  • 9,036 篇 张燕
  • 5,772 篇 张岩
  • 4,091 篇 张云
  • 2,782 篇 张伟
  • 2,471 篇 张妍
  • 2,445 篇 张磊
  • 2,444 篇 张海燕
  • 2,359 篇 王艳
  • 2,257 篇 王燕
  • 2,045 篇 张彦
  • 2,030 篇 李艳
  • 1,961 篇 张静
  • 1,908 篇 李岩
  • 1,867 篇 张敏
  • 1,776 篇 张勇
  • 1,744 篇 刘艳
  • 1,643 篇 李燕
  • 1,600 篇 张涛
  • 1,596 篇 张鹏

语言

  • 486,900 篇 中文
  • 25,262 篇 英文
  • 4 篇 日文
检索条件"作者=yun-yan zhang"
512166 条 记 录,以下是1-10 订阅
排序:
SYNTIIESIS OF 2-AMINO-5-THIO-THIADIAZOLINE β-D-RIBOFURANOSIDES
收藏 引用
Chinese Chemical Letters 1996年 第4期7卷 309-312页
作者: yun yan zhang yun DING Yi Bing zhang Yao Quan CHEN Laboratory of Bio-organic and Natural Products Chemistry Shanghai Institute of organic Chemistry Chinese Academy of Sciences 354 Fenglin RoadShanghai 200032
Amino-5-thio-l,3,4-thiadiazoline and 1-O-acety1-2,3,5-triO-benzoylribofuranose were allowed to react by fusion or by the Vorbruggen procedure. Two products were isolated and characterized to be positional isomers 4-(... 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
CCNO mutation as a cause of primary ciliary dyskinesia:A case report
收藏 引用
World Journal of Clinical Cases 2022年 第25期10卷 9148-9155页
作者: yun-yan zhang yan Lou Han yan Hao Tang Department of Respiratory and Critical Care Medicine Changzheng HospitalNaval Military Medical UniversityShanghai 200003China Department of Orthopedic Oncology Spine Tumor CenterChangzheng HospitalNaval Military Medical UniversityShanghai 200003China Department of Nephrology 905th Hospital of PLA NavyNaval Military Medical UniversityShanghai 200050China
BACKGROUND Primary ciliary dyskinesia(PCD)is an uncommon and genetically diverse *** to reports,most patients had more than 50 visits before being diagnosed with PCD,and the age at diagnosis was mostly in preschool,wi... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Multi-time Collaborative Restoration for Integrated Electrical-gas Distribution Systems Based on Rolling Optimization
收藏 引用
CSEE Journal of Power and Energy Systems 2024年 第2期10卷 660-671页
作者: Jingyang yun Zheng yan yun Zhou Peichao zhang Weidong Hu Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Department of Electrical EngineeringShanghai Jiao Tong University
This paper proposes a multi-time collaborative restoration model for integrated electricity-gas distribution sys-tems(IEGDSs)considering multiple resources after extreme weather *** on the linearized power flow constr... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Harmonic Inversion of Recurrence Spectra of Nonhydrogen Atom in an Electric Field
收藏 引用
Communications in Theoretical Physics 2008年 第5期49卷 1291-1294页
作者: GAO Song XU Xue-You LI Hong-yun zhang yan-Hui LIN Sheng-Lu College of Physics and Electronics Shandong Normal University Jinan 250014 China
An extended harmonic inversion method is analytically continued to approach bifurcation region of the dosed orbits thus to obtain highly resolved spectra of lithium atom in external field. The suitable band-limited si... 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
Clustering for Bivariate Functional Data
收藏 引用
Acta Mathematicae Applicatae Sinica 2024年 第3期40卷 613-629页
作者: Shi-yun CAO yan-qiu ZHOU yan-ling WAN Tao zhang School of Science Guangxi University of Science and TechnologyLiuzhou 545006China School of Marxism Guangxi University of Science and TechnologyLiuzhou 545006China Key Laboratory of Intelligent Information Processing and Graph Processing Guangxi University of Science and TechnologyLiuzhou 545006China
In this paper,we consider the clustering of bivariate functional data where each random surface consists of a set of curves recorded repeatedly for each *** k-centres surface clustering method based on marginal functi... 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
Advances in doping strategies for sodium transition metal oxides cathodes:A review
收藏 引用
Frontiers in Energy 2024年 第2期18卷 141-159页
作者: Zhijing zhang Haoze zhang Yaopeng WU Wei yan Jiujun zhang yun ZHENG Lanting QIAN Department of Chemical Engineering Waterloo Institute of NanotechnologyUniversity of WaterlooWaterloo ON N2L 3G1Canada School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China Institute of New Energy Materials Science and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China
The electrochemistry of cathode materials for sodium-ion batteries differs significantly from lithium-ion batteries and offers distinct ***,the progress of commercializing sodium-ion batteries is currently impeded by ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
An adaptive physics-informed deep learning method for pore pressure prediction using seismic data
收藏 引用
Petroleum Science 2024年 第2期21卷 885-902页
作者: Xin zhang yun-Hu Lu yan Jin Mian Chen Bo Zhou State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China College of Artificial Intelligence China University of Petroleum(Beijing)Beijing102249China PetroChina Tarim Oilfield Company KorlaXinjiang841000China
Accurate prediction of formation pore pressure is essential to predict fluid flow and manage hydrocarbon production in petroleum *** deep learning technique has been receiving more interest due to the great potential ... 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
Composition optimization and performance prediction for ultra-stable water-based aerosol based on thermodynamic entropy theory
收藏 引用
Defence Technology(防务技术) 2024年 第3期33卷 437-446页
作者: Tingting Kang Canjun yan Xinying Zhao Jingru Zhao Zixin Liu Chenggong Ju Xinyue zhang yun zhang yan Wu College of Chemical Engineering and Materials Science Tianjin University of Science and TechnologyNo.29 13th AvenueEconomic and Technologic Development ZoneTianjin 300457China Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization Tianjin University of Science and TechnologyTianjin 300457China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China
Water-based aerosol is widely used as an effective strategy in electro-optical countermeasure on the battlefield used to the preponderance of high efficiency,low cost and ***,the stability of the water-based aerosol i... 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
Self-Powered Flexible Multicolor Electrochromic Devices for Information Displays
收藏 引用
Research 2024年 第2期2023卷 529-540页
作者: Wenzhao Xue yun zhang Feng Liu Yao Dou Mei yan Wenshou Wang School of Chemistry and Chemical Engineering University of JinanJinan 250022P.R.China
The development of self-powered flexible multicolor electrochromic(EC)systems that could switch different color without an external power supply has remained extremely ***,a new trilayer film structure for achieving s... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Upregulation of circ0000381 atienuates microglial/macrophage pyroptosis after spinal cord injury
收藏 引用
Neural Regeneration Research 2024年 第6期19卷 1360-1366页
作者: yan zhang Wenkai zhang Tao Liu Ziqian Ma Wenxiu zhang yun Guan Xueming Chen Central Laboratory Beijing Luhe HospitalCapital Medical UniversityBeijingChina Department of Orthopedics Beijing Luhe HospitalCapital Medical UniversityBeijingChina Department of Emergency Medicine Aerospace Center HospitalBeijingChina Department of Anesthesiology and Critical Care Medicine Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Neurological Surgery Johns Hopkins University School of MedicineBaltimoreMDUSA
Neuroinflammation exacerbates secondary damage after spinal cord injury,while microglia/macrophage pyroptosis is important to *** RNAs(circRNAs)play a role in the central nervous ***,the functional role and mechanism ... 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