咨询与建议

限定检索结果

文献类型

  • 293,774 篇 期刊文献
  • 2,222 篇 会议
  • 6 册 图书
  • 1 篇 学位论文

馆藏范围

  • 296,002 篇 电子文献
  • 1 种 纸本馆藏

日期分布

学科分类号

  • 133,514 篇 工学
    • 24,490 篇 材料科学与工程(可...
    • 22,055 篇 化学工程与技术
    • 16,185 篇 机械工程
    • 13,564 篇 电气工程
    • 12,495 篇 计算机科学与技术...
    • 11,046 篇 环境科学与工程(可...
    • 10,180 篇 电子科学与技术(可...
    • 9,841 篇 动力工程及工程热...
    • 7,802 篇 土木工程
    • 7,712 篇 水利工程
    • 7,550 篇 软件工程
    • 7,534 篇 生物医学工程(可授...
    • 7,523 篇 仪器科学与技术
    • 7,490 篇 控制科学与工程
  • 108,346 篇 医学
    • 65,021 篇 临床医学
    • 16,250 篇 中西医结合
    • 15,172 篇 药学(可授医学、理...
    • 15,164 篇 公共卫生与预防医...
    • 12,427 篇 基础医学(可授医学...
    • 9,406 篇 中药学(可授医学、...
    • 7,902 篇 医学技术(可授医学...
  • 64,795 篇 理学
    • 24,428 篇 化学
    • 18,789 篇 生物学
    • 14,939 篇 物理学
    • 7,605 篇 生态学
  • 38,601 篇 农学
    • 12,578 篇 作物学
    • 8,541 篇 农业资源与环境
  • 19,432 篇 管理学
    • 7,563 篇 公共管理
    • 7,170 篇 管理科学与工程(可...
  • 10,919 篇 教育学
    • 7,769 篇 教育学
  • 6,726 篇 经济学
  • 3,930 篇 法学
  • 3,589 篇 文学
  • 1,963 篇 历史学
  • 1,814 篇 艺术学
  • 849 篇 哲学
  • 720 篇 军事学

主题

  • 2,273 篇 影响因素
  • 1,681 篇 数值模拟
  • 1,650 篇 儿童
  • 1,607 篇 预后
  • 1,565 篇 产量
  • 1,321 篇 大鼠
  • 1,173 篇 危险因素
  • 928 篇 诊断
  • 859 篇 细胞凋亡
  • 846 篇 应用
  • 838 篇 治疗
  • 834 篇 糖尿病
  • 819 篇 力学性能
  • 729 篇 磁共振成像
  • 698 篇 凋亡
  • 691 篇 合成
  • 637 篇 老年人
  • 570 篇 高效液相色谱法
  • 567 篇 疗效
  • 557 篇 玉米

机构

  • 2,361 篇 四川大学
  • 1,811 篇 中南大学
  • 1,802 篇 中国科学院大学
  • 1,760 篇 上海交通大学
  • 1,617 篇 吉林大学
  • 1,586 篇 北京大学
  • 1,556 篇 清华大学
  • 1,394 篇 西北农林科技大学
  • 1,381 篇 西安交通大学
  • 1,293 篇 北京中医药大学
  • 1,274 篇 中国地质大学
  • 1,215 篇 浙江大学
  • 1,212 篇 天津大学
  • 1,204 篇 华中科技大学
  • 1,177 篇 华南理工大学
  • 1,177 篇 中山大学
  • 1,140 篇 武汉大学
  • 1,071 篇 山东大学
  • 1,046 篇 中国农业大学
  • 1,029 篇 河南农业大学

作者

  • 3,524 篇 李媛
  • 1,739 篇 李源
  • 1,412 篇 李元
  • 1,303 篇 李媛媛
  • 1,092 篇 李伟
  • 875 篇 李渊
  • 874 篇 李静
  • 805 篇 李强
  • 765 篇 袁丽
  • 734 篇 李娜
  • 724 篇 张媛
  • 711 篇 李涛
  • 651 篇 王媛
  • 637 篇 李军
  • 628 篇 李明
  • 624 篇 李刚
  • 613 篇 袁媛
  • 597 篇 李远
  • 596 篇 李莉
  • 570 篇 李园

语言

  • 279,223 篇 中文
  • 16,777 篇 英文
  • 3 篇 日文
检索条件"作者=ru-Yuan Li"
296003 条 记 录,以下是1-10 订阅
排序:
Peroral endoscopic myotomy assisted with an elastic ring for achalasia with obvious submucosal fibrosis:A case report
收藏 引用
World Journal of Clinical Cases 2022年 第33期10卷 12257-12260页
作者: Bai-Hui Wang ru-yuan li Department of Gastroenterology Qilu HospitalCheeloo College of MedicineQingdao 266035Shandong ProvinceChina
BACKGROUND Peroral endoscopic myotomy(POEM)is an established treatment option for esophageal ***,technical challenges and failures *** fibrosis is a rare cause of aborted POEM *** SUMMARY We performed POEM with an ela... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Reconstruct recent multi-population migration history by using identical-by-descent sharing
收藏 引用
Journal of Genetics and Genomics 2024年 第6期51卷 642-651页
作者: Wenxiao Zhang Kai yuan ru Wen Haifang li Xumin Ni School of Mathematics and Statistics Beijing Jiaotong UniversityBeijing 100044China The Stanley Center for Psychiatric Research Broad Institute of MIT and HarvardCambridgeMA 02142USA Baidu Incorporated Beijing 100085China
Identical-by-descent(IBD)is a fundamental genomic characteristic in population genetics and has been widely used for population history ***,limited by the nature of IBD,which could only capture the relationship betwee... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Gastric ulcer treated using an elastic traction ring combined with clip: A case report
收藏 引用
World Journal of Clinical Cases 2022年 第31期10卷 11574-11578页
作者: Fei Pang Yan-Jun Song Yin-He Sikong Ai-Jun Zhang Xiu-li Zuo ru-yuan li Department of Gastroenterology Qilu Hospital(Qingdao)Cheeloo College of MedicineShangdong UniversityQingdao 266035Shandong ProvinceChina Department of Hematology Qilu Hospital(Qingdao)Cheeloo College of MedicineShangdong UniversityQingdao 266035Shandong ProvinceChina Department of Gastroenterology Qilu HospitalCheeloo College of MedicineShangdong UniversityJinan 250012Shandong ProvinceChina
BACKGROUND There is a high annual incidence of acute,nonvariceal upper gastrointestinal bleeding in Chinese *** endoscopic intervention can reduce rates of rebleeding,surgery,and *** metal clip is the most common meth... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Multi-stimuli-responsive aggregation-induced emission copper iodide cluster
收藏 引用
Science China Chemistry 2024年 第4期67卷 1193-1197页
作者: Bo li yuan-yuan liu Peng Luo Ye-ru liu Ying-Jun Chen Kai li Shuang-Quan Zang College of Chemistry and Pharmacy Engineering Nanyang Normal UniversityNanyang 473061China Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhou 450001China
Stimuli-responsive luminescent materials have attracted significant attention in the development of smart photoactive materials for both fundamental research and technological *** this work,a new copper iodide cluster... 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
Submucosal esophageal abscess evolving into intramural submucosal dissection:A case report
收藏 引用
World Journal of Clinical Cases 2022年 第29期10卷 10695-10700页
作者: Yang Jiao Yin-He Sikong Ai-Jun Zhang Xiu-li Zuo Pu-Yue Gao Qing-Guo Ren ru-yuan li Department of General Surgery Shandong University of Qilu Hospital(Qingdao)Qingdao 266000Shandong ProvinceChina Department of Gastroenterology Shandong University of Qilu Hospital(Qingdao)Qingdao 266000Shandong ProvinceChina Department of Gastroenterology Qilu Hospital of Shandong UniversityJinan 250000Shandong ProvinceChina Department of Radiology Shandong University of Qilu HospitalShandong UniversityQingdao 266000Shandong ProvinceChina
BACKGROUND Here we report a rare case of submucosal esophageal abscess evolving into intramural submucosal *** SUMMARY An 80-year-old woman was admitted to our emergency department with a chief complaint of dysphagia ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Modulation on electrostatic potential to build a firm bridge at NiO_(x)/perovskite interface for efficient and stable perovskite solar cells
收藏 引用
Journal of Energy Chemistry 2024年 第9期96卷 249-258页
作者: Xiangbao yuan Xufeng ling Hongyu Wang Chengxia Shen ru li Yehao Deng Shijian Chen Chongqing Key Laboratory of Interface Physics in Energy Conversion College of PhysicsChongqing UniversityChongqing 401331China Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Center of Modern Physics Institute for Smart City of Chongqing University in LiyangLiyang 213300JiangsuChina
The NiO_(x)/perovskite interface in NiO_(x)-based inverted perovskite solar cells(PSCs)is one of the main issues that restrict device performance and long-term stability,as the unwanted interfacial defects and undesir... 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
Hydrogen-based mineral phase transformation mechanism investigation of pyrolusite ore
收藏 引用
International Journal of Minerals,Metallurgy and Materials 2024年 第11期31卷 2445-2457页
作者: ruofeng Wang Shuai yuan Yanjun li Peng Gao ru li School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient exploitation technology for Refractory Iron Ore Resources Shenyang 110819China
Pyrolusite comprises the foremost manganese oxides and is a major source of manganese *** innovative hydrogenbased mineral phase transformation technology to pyrolusite was proposed,where a 96.44%distribution rate of ... 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
Robustness of the octupole collectivity in 144Ba within the cranking covariant density functional theory in 3D lattice
收藏 引用
Nuclear Science and Techniques 2024年 第8期35卷 124-131页
作者: Ze‑Kai li yuanyuan Wang Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China
The octupole deformation and collectivity in octupole double-magic nucleus 144Ba are investigated using the Cranking covariant density functional theory in a three-dimensional lattice *** reduced B(E3)transition proba... 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
Overview of ectopic pancreas
收藏 引用
World Journal of Gastrointestinal Surgery 2024年 第2期16卷 284-288页
作者: Chang-Fei li Qiu-ru li Miao Bai yuan-Shi Lv Yan Jiao Patient Service Center The Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Neurology The Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Fundus Disease The Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Thyroid Head and Neck Surgery Jilin Cancer HospitalChangchun 130000Jilin ProvinceChina Department of Hepatobiliary and Pancreatic Surgery General Surgery CenterThe First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina
This editorial discusses the article written by Zheng et al that was published in the latest edition of the World Journal of Gastrointestinal *** primary focus is on the causes,location,diagnosis,histological classifi... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Dynamic mechanical characteristics of deep Jinping marble in complex stress environments
收藏 引用
Journal of Rock Mechanics and Geotechnical Engineering 2024年 第2期16卷 630-644页
作者: Chendi Lou Heping Xie ru Zhang Hai Ren Hao Luo Kun Xiao yuan Peng Qiang Tan li Ren Institute for Disaster Management and Reconstruction Sichuan UniversityChengdu610207China College of Water Resource&Hydropower Sichuan UniversityChengdu610065China MOE Key Laboratory of Deep Earth Science&Engineering Sichuan UniversityChengdu610065China Yalong River Hydropower Development Company Ltd.Chengdu610051China (Chongqing)International Engineering Technology Company Ltd.Chongqing401121China
To reveal the dynamic mechanical characteristics of deep rocks,a series of impact tests under triaxial static stress states corresponding to depths of 300-2400 m were *** results showed that both the strain rates and ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论