首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   18207篇
  免费   573篇
  国内免费   265篇
电工技术   168篇
技术理论   4篇
综合类   6941篇
化学工业   997篇
金属工艺   440篇
机械仪表   607篇
建筑科学   2432篇
矿业工程   110篇
能源动力   41篇
轻工业   282篇
水利工程   146篇
石油天然气   89篇
武器工业   4篇
无线电   903篇
一般工业技术   637篇
冶金工业   1722篇
原子能技术   18篇
自动化技术   3504篇
  2024年   75篇
  2023年   174篇
  2022年   280篇
  2021年   408篇
  2020年   337篇
  2019年   258篇
  2018年   191篇
  2017年   180篇
  2016年   311篇
  2015年   465篇
  2014年   1191篇
  2013年   912篇
  2012年   1161篇
  2011年   1402篇
  2010年   1427篇
  2009年   1405篇
  2008年   1188篇
  2007年   1106篇
  2006年   1095篇
  2005年   934篇
  2004年   845篇
  2003年   912篇
  2002年   760篇
  2001年   407篇
  2000年   386篇
  1999年   247篇
  1998年   116篇
  1997年   64篇
  1996年   51篇
  1995年   47篇
  1994年   39篇
  1993年   25篇
  1992年   30篇
  1991年   23篇
  1990年   22篇
  1989年   27篇
  1988年   47篇
  1987年   39篇
  1986年   27篇
  1982年   27篇
  1981年   23篇
  1979年   19篇
  1964年   27篇
  1960年   16篇
  1959年   17篇
  1958年   17篇
  1957年   30篇
  1956年   21篇
  1955年   34篇
  1954年   26篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
在对影响体育教学质量的几种环境因素分析的基础上,提出了克服体育实践教学环境 因素的消极影响的主要措施以及正确利用这些物理因素的积极作用。  相似文献   
32.
This article describes the role of certification by the American Board of Professional Psychology (ABPP) in easing the process by which psychologists move beyond their original jurisdictional boundaries to practice psychology. Meeting the requirements for licensure or certification in the various jurisdictions can be a difficult task because these requirements vary considerably from jurisdiction to jurisdiction. Other mechanisms that are available to facilitate this process include the Certificate of Professional Qualification in Psychology issued by the Association of State and Provincial Psychology Boards and certification by the National Register of Health Service Providers in Psychology. The ABPP certificate/diploma has been regarded by many state psychological associations and state boards of psychology as an appropriate way in which to recognize psychologists who are eligible for licensure/certification in a jurisdiction because of the examination requirements for board certification. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
33.
我国的工程造价管理体系正在逐步规范,并建立以市场形成价格为主的价格体制;改革现行工程定额管理方式,这些对造价工程师的执业能力和水平提出了更高的要求。造价工程师面临机遇、挑战,必须不断调整知识结构,提高整体素质,拓展个人在专业领域的空间。  相似文献   
34.
This paper describes how SWoRD (scaffolded writing and rewriting in the discipline), a web-based reciprocal peer review system, supports writing practice, particularly for large content courses in which writing is considered critical but not feasibly included. To help students gain content knowledge as well as writing and reviewing skills, SWoRD supports the whole cycle of writing, reviews, back-reviews, and rewriting by scaffolding the journal publication process as its authentic practice model. In addition, SWoRD includes algorithms that compute individual reviewer’s review accuracy, which is in turn used to support the various drawbacks of reciprocal peer reviews (e.g., variation in motivation or ability of reviewers). Finally, this paper describes an empirical evaluation showing that the SWoRD approach is effective in improving writing quality in content classes.  相似文献   
35.
不良的生活方式和个人行为对健康是一种“自我制造的危害”。吸烟有害世人皆知,然而,近年来吸烟大军更表现为年青化、女性化的特点,青年大学生们吸烟也较普遍,烟草危害在吸烟者身上表现也很明显,已给国家造成极大的疾病负担;青年大学生吸烟还有漫延之势,必须积极开设健康教育,传授保健知识,让他们自己起来同不良的生活习惯作斗争,同时,还必须制定有效的行政干预措施,才能把吸烟带来的毒害控制在最小范围。  相似文献   
36.
论述了制造业中、高级岗位职业技术教育的意义、现状、存在问题及其人才市场要求,探讨了办好制造业职业技术教育的几个关键问题。  相似文献   
37.
For the last seven years, a summer Research Experiences for Undergraduates site in structural engineering, funded by the National Science Foundation, has operated at the University of Alabama at Birmingham. During this time, 33 students from 22 colleges and universities have participated in the site. Participants are recruited nationally and have come from as far away as California and Puerto Rico. The program is intended to provide students interested in graduate studies with an introduction to research methods, and to provide students who will not continue their studies past a bachelor of science in civil engineering with a better understanding of how research provides the theoretical foundation of engineering practice. Students work individually with faculty on literature reviews, computer modeling, laboratory testing, and field research. Three students have researched structural failure case studies and the technical and ethical lessons to be learned from them. Participants also have the opportunity to tour construction sites and construction material manufacturers’ and fabricators’ facilities. During the past three years, an ethics seminar series has been added. At the end of the program, students prepare research papers and Web pages documenting their work and present their results to faculty, students, and other participants.  相似文献   
38.
简述了中国传统职业道德教育思想;并就高职院校如何借鉴和发掘优秀传统职业道德教育资源,科学、合理、有效地运用优秀传统职业道德资源塑造当代新人进行了探讨。  相似文献   
39.
Abstract This paper outlines the work of the Conceptual Change in Science project, funded as part of the ESRC InTER programme. The aims of this research project are to clarify and describe the process of change in learners' conceptual understandings of natural phenomena. The domain of reasoning selected for study is that of mechanics. Computer software which may be useful in exploring and developing pupils' reasoning and promoting conceptual change in this domain is being developed and evaluated. The group that is carrying out the research is based at the Universities of Leeds, Glasgow and the Open University.  相似文献   
40.
论校园文化和德育目标的一致性   总被引:3,自引:0,他引:3  
中系统介绍了校园化和德育目标的关系,并找准两之间的结合点,通过分析两的一致性和辩证统一关系,达到育人目的。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号