全文获取类型
收费全文 | 4579篇 |
免费 | 248篇 |
国内免费 | 179篇 |
专业分类
电工技术 | 319篇 |
综合类 | 464篇 |
化学工业 | 95篇 |
金属工艺 | 27篇 |
机械仪表 | 78篇 |
建筑科学 | 1251篇 |
矿业工程 | 77篇 |
能源动力 | 55篇 |
轻工业 | 37篇 |
水利工程 | 174篇 |
石油天然气 | 82篇 |
武器工业 | 3篇 |
无线电 | 89篇 |
一般工业技术 | 220篇 |
冶金工业 | 1486篇 |
原子能技术 | 15篇 |
自动化技术 | 534篇 |
出版年
2023年 | 45篇 |
2022年 | 82篇 |
2021年 | 105篇 |
2020年 | 125篇 |
2019年 | 65篇 |
2018年 | 39篇 |
2017年 | 45篇 |
2016年 | 97篇 |
2015年 | 86篇 |
2014年 | 229篇 |
2013年 | 128篇 |
2012年 | 216篇 |
2011年 | 309篇 |
2010年 | 301篇 |
2009年 | 303篇 |
2008年 | 297篇 |
2007年 | 370篇 |
2006年 | 275篇 |
2005年 | 187篇 |
2004年 | 186篇 |
2003年 | 182篇 |
2002年 | 115篇 |
2001年 | 85篇 |
2000年 | 51篇 |
1999年 | 57篇 |
1998年 | 39篇 |
1997年 | 43篇 |
1995年 | 36篇 |
1994年 | 27篇 |
1992年 | 24篇 |
1990年 | 24篇 |
1989年 | 39篇 |
1988年 | 26篇 |
1987年 | 26篇 |
1986年 | 42篇 |
1985年 | 28篇 |
1984年 | 22篇 |
1981年 | 35篇 |
1979年 | 23篇 |
1978年 | 21篇 |
1977年 | 23篇 |
1973年 | 24篇 |
1971年 | 32篇 |
1970年 | 26篇 |
1969年 | 24篇 |
1968年 | 49篇 |
1966年 | 26篇 |
1965年 | 36篇 |
1964年 | 32篇 |
1956年 | 22篇 |
排序方式: 共有5006条查询结果,搜索用时 115 毫秒
21.
BT项目实施模式分析 总被引:1,自引:0,他引:1
根据实践中出现的各种BT项目管理模式,归纳出了具有代表性的“施工二次招标型BT模式,直接施工型BT模式,施工同体型BT模式,带资承包型BT模式”四种BT项目管理模式,并根据现行法律法规对其适用性和实施中应注意的问题进行了论述。 相似文献
22.
No authorship indicated 《Canadian Metallurgical Quarterly》1985,26(4):317a
The Annual General Meeting of the Canadian Psychological Association was held at the World Trade and Convention Centre, Halifax, Nova Scotia, on June 7,1985 at 4:00 p.m. The President, Elinor Ames, acted as Chair of the Meeting and the Administrative Officer, Brenda Stoneham, as Secretary. The minutes presented here include: Adoption of Agenda; Approval of Minutes; Report of the President; CPA Awards; Appointments; Finance; By-Laws, Rules, and Procedures; Membership and Journal Circulation; Executive Director's Report; Journal Reports; Division Reports; Annual Meetings; Committee Reports; Affiliations; Other Business; and Adjournment. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
23.
No authorship indicated 《Canadian Metallurgical Quarterly》1995,50(4):243
Presents the citation, biography, and selected bibliography for Robert B. McCall, one of the 1994 recipients of the American Psychological Association's Award for Distinguished Professional Contributions--Distinguished Professional Contributions to Public Service. From McCall's citation: "Building on a prolific research career in child development, Robert B. McCall communicated the scientific findings of his colleagues to the public through the mass media, winning four national awards and demonstrating to a sometimes skeptical profession that such articles and TV programs could be both accurate and interesting. Subsequently, he became the inaugural director for the University of Pittsburgh Office of Child Development, a unique interdisciplinary, university-community facilitative unit that has broadened the definition of university public service to embrace partnerships among faculty and community service professionals, funders, and policymakers that have created innovative interdisciplinary training and research programs, human service demonstration and evaluation projects, and policy studies." (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
24.
25.
No authorship indicated 《Canadian Metallurgical Quarterly》1985,40(2):221
The APA Membership Committee announces that the 1,838 persons listed here were elected to initial membership in the American Psychological Association as of January 1, 1985. Of these, 1,392 were elected as Members, and 446 as Associate members. Though not all of them have validated their election by payment of initial dues, all but a few will eventually do so. In addition, in accordance with Article II, Section 8, of the Bylaws, 316 Associate members were transferred to Member status as of January 1, 1985. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
26.
27.
No authorship indicated 《Canadian Metallurgical Quarterly》1994,49(4):271
The Early Career Awards, given for the first time in 1974, recognize the large number of excellent young psychologists. Recipients of this award may not have held a doctoral degree for more than nine years. For purposes of this award, psychology has been divided into 10 areas: animal learning and behavior, comparative; developmental; health; cognition/human learning; psychopathology; behavioral and cognitive neuroscience; perception/motor performance; social; applied research; and individual differences. Five areas are considered each year, with areas rotated in two-year cycles. The citation, biography, and selected bibliography of Robert M. Nosofsky, one of the 1993 recipients of the Award for Distinguished Scientific Early Career Contributions to Psychology (Cognition/Human Learning), are presented here. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
28.
No authorship indicated 《Canadian Metallurgical Quarterly》1994,49(4):289
Presents the citation, biography, and selected bibliography of Jill N. Reich, one of the 1993 recipients of the American Psychological Association's Award for Distinguished Contribution to Education and Training in Psychology. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
29.
No authorship indicated 《Canadian Metallurgical Quarterly》1988,43(4):241b
Presents the citation, biography, and selected bibliography for Edwin Shneidman, one of the 1987 recipients of the American Psychological Association's Award for Distinguished Professional Contributions to Public Service. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
30.
文章分析了工程量清单计价的费用组成,阐述了按照清单计价规范招投标的工程在合同签订时使用《合同示范文本》应注意的问题,并分析了合同履行过程中加强合同监督的必要性。 相似文献