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   25403篇
  免费   2233篇
  国内免费   983篇
电工技术   1551篇
技术理论   1篇
综合类   2304篇
化学工业   3522篇
金属工艺   503篇
机械仪表   875篇
建筑科学   3420篇
矿业工程   1170篇
能源动力   1050篇
轻工业   1241篇
水利工程   1527篇
石油天然气   889篇
武器工业   266篇
无线电   1904篇
一般工业技术   1371篇
冶金工业   2332篇
原子能技术   185篇
自动化技术   4508篇
  2024年   50篇
  2023年   221篇
  2022年   351篇
  2021年   519篇
  2020年   579篇
  2019年   519篇
  2018年   506篇
  2017年   718篇
  2016年   932篇
  2015年   947篇
  2014年   1427篇
  2013年   1361篇
  2012年   1532篇
  2011年   1898篇
  2010年   1439篇
  2009年   1555篇
  2008年   1471篇
  2007年   1683篇
  2006年   1588篇
  2005年   1293篇
  2004年   1120篇
  2003年   1046篇
  2002年   897篇
  2001年   773篇
  2000年   555篇
  1999年   442篇
  1998年   308篇
  1997年   250篇
  1996年   205篇
  1995年   191篇
  1994年   167篇
  1993年   111篇
  1992年   104篇
  1991年   66篇
  1990年   98篇
  1989年   46篇
  1988年   49篇
  1987年   41篇
  1986年   38篇
  1985年   151篇
  1984年   245篇
  1983年   287篇
  1982年   208篇
  1981年   310篇
  1980年   119篇
  1979年   40篇
  1978年   42篇
  1976年   14篇
  1975年   22篇
  1974年   24篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Although continuing care is strongly related to positive treatment outcomes for substance use disorder (SUD), participation rates are low and few effective interventions are available. In a randomized clinical trial with 150 participants (97% men), 75 graduates of a residential Veterans Affairs Medical Center SUD program who received an aftercare contract, attendance prompts, and reinforcers (CPR) were compared to 75 graduates who received standard treatment (STX). Among CPR participants, 55% completed at least 3 months of aftercare, compared to 36% in STX. Similarly, CPR participants remained in treatment longer than those in STX (5.5 vs. 4.4 months). Additionally, CPR participants were more likely to be abstinent compared to STX (57% vs. 37%) after 1 year. The CPR intervention offers a practical means to improve adherence among individuals in SUD treatment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
62.
This investigation determined the influence of testosterone and neurobehavioral disinhibition (ND) on risk for substance use disorder (SUD). Testosterone level during puberty was hypothesized to promote social dominance associated with norm-violating behavior that, in turn, predisposes individuals to use of illicit drugs and, subsequently, SUD. Using a prospective paradigm, the authors recruited 179 boys (mean age=11.62 years, SD=0.88) and followed up when participants were ages 12-14, 16, 19, and 22. Results indicated that social dominance/norm-violating behavior (SD/NVB) at age 16 mediated the association between testosterone level (ages 12-14) and SUD (age 22). In addition, SD/NVB mediated the association between ND and SUD. These findings suggest that development of SUD is influenced by androgen-dependent and neurobehavioral processes via a social motivational style characterized by SD/NVB. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
63.
Presents a reply by B. Fowers and B. Davidov to Islam's comments (see record 2007-14606-019) regarding their article (see record 2006-11202-002). Islam noted that virtues are often presented as universally valid character strengths, yet formulations of virtues are always embedded in a particular cultural context, a point we took pains to make in our article. We focus our response on Islam's important suggestion that this tension between universal human characteristics and the particulars of cultural context is indissoluble. Whereas he suggested this tension leads to contradiction and paradox, we see it as a fertile dialectic. The virtue of openness to the other is also subject to the same tension of abstract formulation and particular application. Although we formulated this virtue in a very general way, any instantiation of it would be shaped by the particulars of the cultural context and the situation in which it is exercised. We introduced the concept of dialogue because it is constituted not only by differences between individuals or groups but even more fundamentally by the dialectical relationship between those differences in cultural particularities and the universal human capacities for reason, curiosity, and social engagement, among others. Dialogue acknowledges the indissoluble otherness one finds in those culturally different from oneself, and yet real interchange can only occur because participants in dialogue exercise the cognitive flexibility characteristic of human beings and recognize a shared humanity with the other. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
64.
Presents the citation, biography, and selected bibliography for J?rn Diedrichsen, one of the 2007 recipients of the American Psychological Association's Award for Distinguished Scientific Early Career Contributions to Psychology (perception/motor performance). (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
65.
Presents the citation, biography, and selected bibliography for Patrik O. Vuilleumier, one of the 2007 recipients of the American Psychological Association's Award for Distinguished Scientific Early Career Contributions to Psychology (behavioral and cognitive neuroscience). (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
66.
Presents the citation, biography, and selected bibliograpy for Larke Nahme Huang, the 2007 recipient of the American Psychological Association's Award for Distinguished Senior Career Contributions to Psychology in the Public Interest. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
67.
Ready-to-drinks (RTDs) are composed of an alcoholic component and a soft-drink base and are primarily consumed by a youth market. The authors explored whether liking and experience with an RTD soft-drink base predicts liking for the RTD. Participants (N=350) from ages 12 to 30 years sampled 3 RTDs and their respective soft-drink and alcoholic components. For milk- and fruit-based RTDs, liking for and familiarity with their soft-drink base was the best predictor of liking for and familiarity with the RTD itself. For the Coke-based RTD, familiarity with and liking for bourbon best predicted familiarity with and liking for the RTD. All of these effects were consistent across blind and nonblind testing. The authors' results suggest that where there is perceptual similarity between the RTD and its soft-drink base, these beverages may provide an easy transition into alcohol consumption for novice drinkers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
68.
Presents the citation, biography, and selected bibliography for R. Chris Fraley, one of the 2007 recipients of the American Psychological Association's Award for Distinguished Scientific Early Career Contributions to Psychology (individual differences). (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
69.
Presents the citation, biography, and selected bibliography for Bruce E. Wampold, the 2007 recipient of the American Psychological Association's Award for Distinguished Professional Contributions to Applied Research. Also presented is an article based on the author's award address delivered at the APA's 115th annual meeting, held August 17-20, 2007, in San Francisco, California. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
70.
This study examined whether social phobics differed from nonanxious controls in occupational adjustment. Results indicated that generalized and nongeneralized social phobics, in contrast to controls, were underemployed and believed that their supervisor would rate them as less dependable. Nongeneralized social phobics and controls believed their supervisor would rate them higher in work role conformance and likelihood of advancement than did generalized social phobics. Generalized socially phobic women, in contrast to nongeneralized and control group women, were more likely to be employed in noninterpersonally oriented jobs. Generalized social phobics were more anxious than controls when starting their current job but did not differ in job satisfaction. Results are discussed relative to the nature of social phobia, subtype differences, and counseling services. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  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