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   909篇
  免费   57篇
  国内免费   33篇
电工技术   10篇
综合类   148篇
化学工业   23篇
金属工艺   9篇
机械仪表   15篇
建筑科学   65篇
矿业工程   3篇
轻工业   22篇
水利工程   3篇
石油天然气   4篇
无线电   110篇
一般工业技术   56篇
冶金工业   180篇
自动化技术   351篇
  2024年   1篇
  2023年   7篇
  2022年   10篇
  2021年   20篇
  2020年   21篇
  2019年   18篇
  2018年   10篇
  2017年   23篇
  2016年   23篇
  2015年   25篇
  2014年   67篇
  2013年   56篇
  2012年   52篇
  2011年   78篇
  2010年   64篇
  2009年   73篇
  2008年   75篇
  2007年   71篇
  2006年   66篇
  2005年   57篇
  2004年   33篇
  2003年   40篇
  2002年   13篇
  2001年   27篇
  2000年   11篇
  1999年   3篇
  1998年   5篇
  1997年   7篇
  1996年   3篇
  1995年   3篇
  1994年   9篇
  1993年   5篇
  1992年   8篇
  1991年   2篇
  1989年   2篇
  1988年   4篇
  1986年   1篇
  1982年   1篇
  1966年   1篇
  1962年   1篇
  1957年   1篇
  1955年   1篇
  1954年   1篇
排序方式: 共有999条查询结果,搜索用时 875 毫秒
1.
2.
移动增值业务在全球的发展速度依然很快,非话音收入占电信总收入的比重越来越大.在移动增值业务的发展上,日本遥遥领先,韩国紧随其后.在中国,虽然短信业务收入开始下降,但无线应用协议(WAP)、交互式语音回应(lVR)等业务收入快速攀升,从而保证了移动增值业务在中国的发展速度.由于中国信息产业部整顿收费混乱的移动增值业务市场,使服务提供商/内容提供商(SP/CP)的暴利时代成为过去,增值业务市场进入精耕细作期.随着用户对移动增值业务新的需求的不断增长,整首音乐下载、移动E-mail以及手机电视等业务将成为未来全球最有前途的移动增值业务.  相似文献   
3.
According to Carl Jung, a person's symptoms occur as a result of the psyche's creative attempt to self-regulate. These symptoms are viewed as the symbol-making function of the psyche. Music therapy as a therapeutic tool is also viewed as having a symbol-making function in that the physical act of making music involves conceptualizing one's symptoms into sounds. The sound serves as a musical symbol of the symptom. The myth of Orpheus is offered as an example of how early man amplified the creative potential contained in music to heal from life's woes. The Orphic archetype illustrates that music serves as a medium for healing and as an expression of Self. That psyche can be healed by music is a reminder of the connection between music therapy and the myth of Orpheus. In using the therapeutic tool of music one can transcend, through the symbol making process inherent in music therapy, the tension of opposites that are created at the crossroads of disease and wellness. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
4.
In its policy rationale for evidence-based practice in psychology (EBPP), the APA Presidential Task Force on Evidence-Based Practice (see record 2006-05893-001) claims to have constituted itself with "scientists and practitioners from a wide range of perspectives and traditions, reflecting the diverse perspectives within the field" (p. 273). We applaud this attention to diversity but contend that an entire perspective of the debate was omitted in the Task Force's newly approved policy and its underlying report. The failure to consider a philosophy of science perspective led the Task Force to make a number of epistemological assumptions that are not based on evidence or rationale and that thus violate the very spirit of evidence-based decision making. In this comment, we reveal a few of these assumptions and discuss their detrimental consequences. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
5.
A nonlinear method named detrended fluctuation analysis (DFA) was utilized to investigate the scaling behavior of the human electroencephalogram (EEG) in three emotional music conditions (fear, happiness, sadness) and a rest condition (eyes-closed). The results showed that the EEG exhibited scaling behavior in two regions with two scaling exponents β1 and β2 which represented the complexity of higher and lower frequency activity besides α band respectively. As the emotional intensity decreased the value of β1 increased and the value of β2 decreased. The change of β1 was weakly correlated with the 'approach-withdrawal' model of emotion and both of fear and sad music made certain differences compared with the eyes-closed rest condition. The study shows that music is a powerful elicitor of emotion and that using nonlinear method can potentially contribute to the investigation of emotion.  相似文献   
6.
研究利用Windows的计划任务来解决扩音机和电脑的自动开关及建立相关音乐曲库、自动播放任务,以此实现广播系统的自动化播出。  相似文献   
7.
8.
9.
Research with computer systems and musical grammars into improvisation as found in the tabla drumming system of North India has indicated that certain musical sentences comprise (a) variable prefixes, and (b) fixed suffixes (or cadences) identical with those of their original rhythmic themes. It was assumed that the cadence functioned as a kind of target in linear musical space, and yet experiments showed that defining what exactly constituted the cadence was problematic. This paper addresses the problem of the status of cadential patterns, and demonstrates the need for a better understanding and formalization of ambiguity in musico-cognitive processing. It would appear from the discussion that the cadence is not a discrete unit in itself, but just part of an ever-present underlying framework comprising the entire original rhythmic theme. Improvisations (variations), it is suggested, merely break away from and rejoin this framework at important structural points. This endorses the theory of simultaneity. However, the general cognitive implications are still unclear, and further research is required to explore musical ambiguity and the interaction of musical, linguistic, and spatio-motor grammars.  相似文献   
10.
在快乐中培养公民高尚的道德品行是亚里士多德音乐教育思想的道德目标。在审美通感的基础上,通过道德移情进行理性灵魂的德性活动,是公民通过音乐教育培养道德品行的心理机制。“执中”为善、积习成德是音乐教育培塑道德公民的途径。  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