咨询与建议

限定检索结果

文献类型

  • 694,358 篇 期刊文献
  • 5,892 篇 会议
  • 49 篇 学位论文
  • 31 册 图书

馆藏范围

  • 700,325 篇 电子文献
  • 5 种 纸本馆藏

日期分布

学科分类号

  • 320,903 篇 工学
    • 43,320 篇 材料科学与工程(可...
    • 34,182 篇 化学工程与技术
    • 31,267 篇 机械工程
    • 24,276 篇 计算机科学与技术...
    • 20,452 篇 电气工程
    • 18,898 篇 软件工程
    • 17,719 篇 土木工程
    • 16,821 篇 仪器科学与技术
    • 16,154 篇 动力工程及工程热...
    • 14,947 篇 环境科学与工程(可...
    • 14,681 篇 交通运输工程
    • 13,952 篇 控制科学与工程
    • 13,622 篇 电子科学与技术(可...
    • 13,472 篇 水利工程
    • 12,331 篇 食品科学与工程(可...
  • 202,759 篇 医学
    • 116,624 篇 临床医学
    • 27,370 篇 中西医结合
    • 20,300 篇 公共卫生与预防医...
    • 17,917 篇 药学(可授医学、理...
    • 15,034 篇 中药学(可授医学、...
    • 14,101 篇 医学技术(可授医学...
    • 13,399 篇 基础医学(可授医学...
  • 82,547 篇 理学
    • 17,969 篇 化学
    • 15,663 篇 生物学
  • 70,320 篇 农学
    • 18,011 篇 作物学
    • 14,920 篇 农业资源与环境
  • 53,681 篇 管理学
    • 21,420 篇 管理科学与工程(可...
    • 17,602 篇 公共管理
  • 34,442 篇 教育学
    • 26,697 篇 教育学
  • 22,198 篇 经济学
    • 19,368 篇 应用经济学
  • 17,665 篇 法学
  • 10,337 篇 文学
  • 5,266 篇 艺术学
  • 4,827 篇 历史学
  • 2,756 篇 哲学
  • 2,102 篇 军事学

主题

  • 4,434 篇 数值模拟
  • 4,408 篇 影响因素
  • 3,417 篇 预后
  • 3,284 篇 儿童
  • 2,997 篇 应用
  • 2,706 篇 产量
  • 2,569 篇 力学性能
  • 2,417 篇 危险因素
  • 2,397 篇 诊断
  • 2,267 篇 大鼠
  • 2,263 篇 治疗
  • 2,077 篇 对策
  • 1,993 篇 磁共振成像
  • 1,873 篇 教学改革
  • 1,726 篇 中国
  • 1,596 篇 糖尿病
  • 1,589 篇 综述
  • 1,521 篇 稳定性
  • 1,485 篇 合成
  • 1,459 篇 细胞凋亡

机构

  • 4,280 篇 中国科学院大学
  • 4,218 篇 清华大学
  • 3,932 篇 哈尔滨工业大学
  • 3,887 篇 吉林大学
  • 3,775 篇 北京大学
  • 3,580 篇 天津大学
  • 3,551 篇 兰州大学
  • 3,524 篇 西北农林科技大学
  • 3,481 篇 上海交通大学
  • 3,425 篇 西安交通大学
  • 3,401 篇 浙江大学
  • 3,396 篇 同济大学
  • 3,248 篇 山东大学
  • 3,064 篇 中国矿业大学
  • 2,989 篇 中国地质大学
  • 2,914 篇 宁夏大学
  • 2,872 篇 四川大学
  • 2,811 篇 西北工业大学
  • 2,669 篇 中国石油大学
  • 2,608 篇 大连理工大学

作者

  • 4,638 篇 马超
  • 3,644 篇 马丽
  • 3,391 篇 马宁
  • 3,381 篇 马强
  • 3,299 篇 马静
  • 3,110 篇 马涛
  • 2,891 篇 马军
  • 2,832 篇 马骏
  • 2,586 篇 马莉
  • 2,419 篇 马勇
  • 2,334 篇 马力
  • 2,242 篇 马琳
  • 2,174 篇 马杰
  • 1,923 篇 马艳
  • 1,653 篇 马林
  • 1,636 篇 马玲
  • 1,586 篇 马俊
  • 1,503 篇 马健
  • 1,414 篇 马飞
  • 1,414 篇 马瑞

语言

  • 663,913 篇 中文
  • 36,406 篇 英文
  • 10 篇 日文
  • 1 篇 法文
检索条件"作者=hai‑Fen ma"
700330 条 记 录,以下是1-10 订阅
排序:
Clinical heterogeneity and five phenotypes identified in pediatric Behçet’s syndrome: a cohort study from Shanghai Behçet’s syndrome database
收藏 引用
World Journal of Pediatrics 2024年 第8期20卷 801-808页
作者: Dan Hu Chun-Hui She Hua-Fang Bao Jun Zou Jian-Fei Cai Jing‑fen Ye Yan Shen hai‑fen ma Dan Luo Jian-Long Guan Department of Rheumatology and Immunology Huadong Hospital Affiliated to Fudan University221 Yan’an West Road200040ShanghaiChina
Objectives Behçet’s syndrome(BS)is a rare disease of unknown etiology,with limited reports especially in pediatric *** clinical characteristics and phenotypes of pediatric BS as a highly heterogeneous variable vessel... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
A Review on Vibration Control of Multiple Cylinders Subjected to FlowInduced Vibrations
收藏 引用
China Ocean Engineering 2024年 第2期38卷 183-197页
作者: XU Wan-hai ma Ye-xuan State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin UniversityTianjin 300350China Institute of Mechanics Chinese Academy of SciencesBeijing 100190China
The fatigue damage caused by flow-induced vibration(FIV)is one of the major concerns for multiple cylindrical structures in many engineering *** FIV suppression is of great importance for the security of many cylindri... 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
Study on trifluoromethanesulfonic acid-promoted synthesis of daidzein: Process optimization and reaction mechanism
收藏 引用
Chinese Journal of Chemical Engineering 2024年 第7期71卷 132-139页
作者: hai Cao haibin Yang Yanxiong Fang Yuandi Zeng Xiaolan Cai Jingjing ma School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China
Daidzein has been widely used in pharmaceuticals,nutraceuticals,cosmetics,feed additives,*** preparation process and related reaction mechanism need to be further investigated.A cost-effective process for synthesizing... 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
Human influence on the duration of extreme temperature events in Asia's hotspot regions
收藏 引用
Advances in Climate Change Research 2024年 第2期15卷 312-326页
作者: Zi-Meng WANG Hong-Yun ma Wei LI hai-Shan CHEN Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory of Meteorological Disaster Ministry of Education(KLME)Nanjing University of Information Science and TechnologyNanjing 210044China
Observations and models indicate that human activities exert a considerable impact on the frequency and intensity of extreme temperature events,which are associated with global ***,changes in the duration of extreme t... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Prognostic value of PEA3 subfamily gene expression in cholangiocarcinoma
收藏 引用
World Journal of Gastrointestinal Oncology 2024年 第9期16卷 4014-4027页
作者: Li Wang Zhe Zhang hai-Zhang ma Department of Emergency The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina Department of Emergency Medicine The First People’s Hospital of Linping District HangzhouHangzhou 311100Zhejiang ProvinceChina Department of General Surgery Qilu Hospital of Shandong UniversityJinan 250000Shandong ProvinceChina
BACKGROUND Cholangiocarcinoma(CCA)is a lethal malignancy with limited treatment options and poor *** PEA3 subfamily of E26 transformation specific genes:ETV1,ETV4,and ETV5 are known to play significant roles in variou... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Prediction of surface settlement caused by synchronous grouting during shield tunneling in coarse-grained soils:A combined FEM and machine learning approach
收藏 引用
Underground Space 2024年 第3期16卷 206-223页
作者: Chao Liu Zepan Wang hai Liu Jie Cui Xiangyun Huang Lixing ma Shuang Zheng School of Civil Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Engineering Research Center for Underground Infrastructural Protection in Coastal Clay Areas Guangzhou UniversityGuangzhou 510006China Earthquake Engineering Research&Test Center Guangzhou UniversityGuangzhou 510006China CSCEC4 Civil Engineering Co. Ltd.Shenzhen 518052China
This paper presents a surrogate modeling approach for predicting ground surface settlement caused by synchronous grouting during shield tunneling *** proposed method combines finite element simulations with machine le... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Effect of Sonic hedgehog gene-modified bone marrow mesenchymal stem cells on graft-induced retinal gliosis and retinal ganglion cells survival in diabetic mice
收藏 引用
International Journal of Ophthalmology(English edition) 2024年 第1期17卷 34-41页
作者: Tong Wang hai-Chun Li Jin ma Xi-Ling Yu State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhou 510060Guangdong ProvinceChina
AIM:To investigate the effects of Sonic hedgehog(Shh)gene-modified bone marrow mesenchymal stem cells(MSCs)on graft-induced retinal gliosis and retinal ganglion cells(RGCs)survival in diabetic ***:Bone marrow-derived ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Research on casing deformation prevention technology based on cementing slurry system optimization
收藏 引用
Petroleum Science 2024年 第2期21卷 1231-1240页
作者: Yan Yan Meng Cai Wen-hai ma Xiao-Chuan Zhang Li-Hong Han Yong-Hong Liu State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment materials CNPC Tubular Goods Research InstituteXi©an710077ShaanxiChina College of Mechanical and Electrical Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Shale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province Chengdu610095SichuanChina CNPC Daqing Oilfield Company Daqing163453HeilongjiangChina
The casing deformation prevention technology based on the optimization of cement slurry is proposed to reduce the casing deformation of shale oil and gas wells during hydraulic fracturing. In this paper, the fracture ... 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
Influence of initial check, information exchange, final accuracy check, reaction information nursing on the psychology of elderly with lung cancer
收藏 引用
World Journal of Clinical Cases 2024年 第4期12卷 737-745页
作者: Cui Jiang Jing ma Wen He hai-Ying Zhang The Second Ward of Thoracic Radiotherapy Hubei Cancer Hospital Affiliated to Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430079Hubei ProvinceChina Nursing School Henan University of Science and TechnologyLuoyang 471000Henan ProvinceChina Department of Intensive Care Unit Wuhan First HospitalWuhan 430033Hubei ProvinceChina Department of Nursing Huangpi District People′s Hospital of WuhanWuhan 430300Hubei ProvinceChina
BACKGROUND As one of the fatal diseases with high incidence,lung cancer has seriously endangered public health and *** patients usually have poor self-care and are more likely to show a series of psychological *** To ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Enhanced hydrogen evolution performance by 3D ordered macroporous Ru-CoP@NC electrocatalysts
收藏 引用
Rare Metals 2024年 第3期43卷 1095-1107页
作者: Chen-Chen Zhang Sheng Wei Li-Xian Sun Yi-Fang Ouyang fen Xu hai-Liang Chu Hong-GePan Li-Xin Chen Xue-Zhang Xiao School of material Science and Engineering Guilin University of Electronic TechnologyGuilin541004China School of Chemistry and Chemical Engineering Guangxi UniversityNanning530004China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen518055GuangdongChina Institute of Science and Technology for New Energy Xi'an Technological UniversityXi'an710021China School of materials Science and Engineering Zhejiang UniversityHangzhou310058China
Electrocatalytic water splitting coupled with sustainable energies is identified as an environmentally friendly and renewable strategy to generate high-quality hydrogen for the fuel ***,the main challenge is to develo... 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