咨询与建议

限定检索结果

文献类型

  • 22,319 篇 期刊文献
  • 2,965 篇 会议
  • 152 册 图书
  • 18 篇 学位论文

馆藏范围

  • 25,384 篇 电子文献
  • 74 种 纸本馆藏

日期分布

学科分类号

  • 12,705 篇 工学
    • 4,104 篇 材料科学与工程(可...
    • 2,276 篇 化学工程与技术
    • 2,018 篇 机械工程
    • 1,906 篇 生物医学工程(可授...
    • 1,242 篇 冶金工程
    • 1,204 篇 动力工程及工程热...
    • 1,197 篇 力学(可授工学、理...
    • 1,011 篇 电子科学与技术(可...
    • 942 篇 控制科学与工程
    • 899 篇 计算机科学与技术...
    • 860 篇 电气工程
    • 691 篇 生物工程
    • 655 篇 地质资源与地质工...
    • 616 篇 土木工程
    • 612 篇 核科学与技术
    • 602 篇 环境科学与工程(可...
  • 8,900 篇 医学
    • 7,495 篇 临床医学
    • 1,784 篇 医学技术(可授医学...
    • 1,188 篇 基础医学(可授医学...
    • 851 篇 药学(可授医学、理...
    • 747 篇 中西医结合
    • 640 篇 公共卫生与预防医...
  • 7,979 篇 理学
    • 2,916 篇 化学
    • 2,529 篇 物理学
    • 1,552 篇 生物学
    • 841 篇 数学
    • 660 篇 地球物理学
    • 659 篇 地质学
    • 627 篇 天文学
  • 1,982 篇 农学
    • 591 篇 作物学
  • 879 篇 教育学
  • 849 篇 管理学
  • 488 篇 经济学
  • 276 篇 法学
  • 262 篇 文学
  • 122 篇 艺术学
  • 109 篇 历史学
  • 58 篇 哲学
  • 34 篇 军事学

主题

  • 201 篇 ct
  • 140 篇 mri
  • 107 篇 患者
  • 80 篇 中国
  • 72 篇 mr
  • 68 篇 mechanical prope...
  • 66 篇 病人
  • 64 篇 日本
  • 53 篇 simulation
  • 51 篇 危险因素
  • 51 篇 microstructure
  • 42 篇 analysis
  • 37 篇 properties
  • 35 篇 of
  • 34 篇 气候变化
  • 32 篇 性能
  • 30 篇 corrosion
  • 30 篇 high
  • 30 篇 药物治疗
  • 28 篇 magnesium alloy

机构

  • 131 篇 北京大学
  • 114 篇 香港理工大学
  • 113 篇 南京大学
  • 103 篇 中国科学院大学
  • 93 篇 上海交通大学
  • 85 篇 香港城市大学
  • 68 篇 university of mi...
  • 67 篇 institute for pa...
  • 67 篇 nikhef p.o.box 4...
  • 67 篇 fysikum stockhol...
  • 67 篇 michigan state u...
  • 67 篇 institut fur the...
  • 67 篇 dept.of physics ...
  • 67 篇 compas group ins...
  • 67 篇 rudolf peierls c...
  • 67 篇 nstitucio catala...
  • 67 篇 department of ph...
  • 67 篇 school of physic...
  • 67 篇 ludwig-maximilia...
  • 67 篇 cea/saclay dsm/i...

作者

  • 122 篇 叶鹏
  • 85 篇 h.murayama
  • 85 篇 j.d.jackson
  • 85 篇 g.d'ambrosio
  • 85 篇 m.white
  • 85 篇 p.de jong
  • 84 篇 v.i.belousov
  • 82 篇 v.burkert
  • 79 篇 y.hayato
  • 77 篇 a.v.gritsan
  • 72 篇 a.gurtu
  • 72 篇 m.carena
  • 71 篇 a.masoni
  • 64 篇 kavli ipmu
  • 64 篇 l.pape
  • 64 篇 s.rolli
  • 59 篇 li y
  • 58 篇 a.d.martin
  • 57 篇 b.heltsley
  • 56 篇 china

语言

  • 14,440 篇 中文
  • 11,014 篇 英文
检索条件"作者=x. y."
25454 条 记 录,以下是71-80 订阅
排序:
The Effect of Procrastination on Phy.ical Ex.rcise among College Students—The Chain Effect of Ex.rcise Commitment and Action Control
收藏 引用
International Journal of Mental Health Promotion 2024年 第8期26卷 611-622页
作者: Zhang W. x. M. Feng y. Mao Z. y.n Z. Department of Phy.ical Education Qufu Normal University Qufu 273165 China Department of Internal Medicine The Ohio State University Columbus 43210 OH United States Teaching Department of Common Courses Shandong University of Art & Design Jinan 250399 China School of Psy.hology Beijing Sport University Beijing 100084 China School of Phy.ical Education Chongqing University of Posts and Telecommunications Chongqing 400065 China
Background: Ex.rcise procrastination is prevalent among college students, causing decline in phy.ical fitness. It is imperative to investigate the mechanism affecting college students’ phy.ical activity.behaviors. Th... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
MAVEN observation of magnetosonic waves in the Martian magnetotail region
收藏 引用
Earth and Planetary.Phy.ics 2024年 第2期8卷 317-325页
作者: ShangChun Teng JiCheng Sun JiaWei Gao y.Harada Markus Fraenz DeSheng Han State Key.Laboratory.of Marine Geology School of Ocean and Earth ScienceTongji UniversityShanghai 200092China MNR Key.Laboratory.for Polar Science Polar Research Institute of ChinaShanghai 200136China Key.Laboratory.of Earth and Planetary.Phy.ics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary.Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Geophy.ics Kyoto UniversityKyotoJapan Max.Planck-Institute for Solar Sy.tem Research GoettingenGermany
Magnetosonic waves are an important medium for energy.transfer in collisionless space *** waves have been widely.investigated in the upstream of the bow shock at *** waves are believed to originate from pickup ions or... 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
Quantification of CO2 Emissions from Three Power Plants in China Using OCO-3 Satellite Measurements
收藏 引用
Advances in Atmospheric Sciences 2024年 第11期41卷 2276-2288页
作者: y.ng y. Zhou M. Wang W. Ning Z. Zhang F. Wang P. College of Data Science Jiaxing University Jiaxing 314000 China LAGEO Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Shanghai Ecological Forecasting and Remote Sensing Center Shanghai 200030 China CNRC Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Key.Laboratory.of Atmospheric Environment and Ex.reme Meteorology Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Department of Atmospheric and Oceanic Sciences / Institute of Atmospheric Sciences Fudan University Shanghai 200082 China
Coal-fired power plants are a major carbon source in China. In order to assess the evaluation of China’s carbon reduction progress with the promise made on the Paris Agreement, it is crucial to monitor the carbon flu... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Towards Improving the Quality.of Requirement and Testing Process in Agile Software Development: An Empirical Study
收藏 引用
Computers, Materials and Continua 2024年 第3期80卷 3761-3784页
作者: Ilay. I. Hafeez y. Almashfi N. Ali S. Humay.n M. Aqib M. Alwakid G. University.Institute of Information Technology Pir Mehr Ali Shah Arid Agriculture University Rawalpindi 46000 Pakistan Department of Software Engineering College of Computer and Information Sciences Jouf University Al Jouf 72388 Saudi Arabia School of Arts Humanities and Social Sciences University of Roehampton London SW15 5PJ United Kingdom Department of Computer Science College of Computer and Information Sciences Jouf University Al Jouf 72388 Saudi Arabia
Software testing is a critical phase due to misconceptions about ambiguities in the requirements during specification, which affect the testing process. Therefore, it is difficult to identify.all faults in software. A... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Influence of inorganic salt on aerobic biodegradability.of dy.stuffs
收藏 引用
Journal of Environmental Sciences 2000年 第4期12卷 416-421页
作者: Zhan, x. Wang, J. Wen, x. Feng, y. Qian, y. Key.Joint Lab. on Envl. Simulation Dept. of Envtl. Sciences and Eng. Tsinghua University Beijing 100084 China
In this paper, the influence of inorganic salt on aerobic biodegradability.of dy.stuffs was studied by.means of semi-continuous activated sludge method. It was found that: biodegradability.of dy.stuffs would decrease ... 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
An update on hormonal regulation of early.embry.-fallopian tube interactions: insights for improvements of assisted reproductive technology.outcomes
收藏 引用
生殖与发育医学(英文) 2024年 第1期08卷 39-49页
作者: Kodithuwakku Suranga P. Ng Ernest H. y. y.ung William S. B. Lee Kai-Fai Department of Obstetrics and Gy.aecology LKS Faculty.of Medicine  3. The University.of Hong Kong  4. Hong Kong SAR 999077  5. China
Human fallopian tubes (FTs) play.important roles in the whole reproductive process. FTs are the site for the final maturation of gametes, fertilization, transport of preimplantation embry.s, and early.embry.nic 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
Homotopy.analy.is solutions for the asy.metric laminar flow in a porous channel with ex.anding or contracting walls
收藏 引用
Acta Mechanica Sinica 2011年 第2期27卷 208-214页
作者: x.-H. Si L.-C. Zheng x.-x. Zhang y. Chao Applied Science School University of Science and Technology Beijing 100083 Beijing China Department of Mechanical Engineering University of Science and Technology Beijing100083 Beijing China Research Institute of Chemical Defense of the EL.A 102205 Beijing China
In this paper, the asy.metric laminar flow in a porous channel with ex.anding or contracting walls is investigated. The governing equations are reduced to ordinary.ones by.using suitable similar transformations. Homot... 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
Ren-integrable and ren-sy.metric integrable sy.tems
收藏 引用
Communications in Theoretical Phy.ics 2024年 第3期76卷 62-69页
作者: S y.Lou School of Phy.ical Science and Technology Ningbo UniversityNingbo315211China
A new ty.e of sy.metry.ren-sy.metry.describing any.n phy.ics and corresponding topological phy.ics,is ***-sy.metry.is a generalization of super-sy.metry.which is widely.applied in super-sy.metric phy.ics such as super... 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
Dy.amic of Scalar Bosons in Aharonov-Bohm Magnetic Field
收藏 引用
Journal of Applied Mathematics and Phy.ics 2024年 第1期12卷 268-276页
作者: Frédéric D. y. Zongo Ecole Normale Supérieure Institut des Sciences et de Technologie Ouaga Burkina Faso
We study.the dy.amic of scalar bosons in the presence of Aharonov-Bohm magnetic field. First, we give the differential equation that governs this dy.amic. Secondly. we use variational techniques to show that the follo... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Trial characteristics and treatment effect estimates in randomized controlled trials of Chinese herbal medicine: A meta-epidemiological study
收藏 引用
Journal of Integrative Medicine 2024年 第3期22卷 223-234页
作者: Betty.H.Wang y.-li Lin y.n-y.n Gao Jin-lu Song Lang Qin Ling-qi Li Wen-qi Liu Claire C.W.Zhong Mary.y.Jiang Chen Mao x.ao-bo y.ng Vincent C.H.Chung Irene x.y.Wu Jockey.Club School of Public Health and Primary.Care the Chinese University of Hong KongHong Kong 999077China x.angy. School of Public Health Central South UniversityChangsha 410006Hunan ProvinceChina School of Chinese Medicine the Chinese University of Hong KongHong Kong 999077China School of Public Health Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina State Key.Laboratory.of Dampness Sy.drome of Chinese Medicine the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Chinese Medicine Sy.drome Research Team the Second Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Guangdong Provincial Key.Laboratory.of Clinical Research on Traditional Chinese Medicine Sy.drome Guangzhou 510120Guangdong ProvinceChina Hunan Provincial Key.Laboratory.of Clinical Epidemiology Central South UniversityChangsha 410006Hunan ProvinceChina
Background:Previously.published meta-epidemiological studies focused on Western medicine have identified some trial characteristics that impact the treatment effect of randomized controlled trials(RCTs).Nevertheless,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