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   9775篇
  免费   721篇
  国内免费   102篇
电工技术   128篇
综合类   29篇
化学工业   2071篇
金属工艺   192篇
机械仪表   368篇
建筑科学   209篇
矿业工程   35篇
能源动力   568篇
轻工业   1029篇
水利工程   107篇
石油天然气   70篇
武器工业   1篇
无线电   1231篇
一般工业技术   2244篇
冶金工业   620篇
原子能技术   116篇
自动化技术   1580篇
  2024年   45篇
  2023年   270篇
  2022年   542篇
  2021年   1002篇
  2020年   618篇
  2019年   688篇
  2018年   688篇
  2017年   582篇
  2016年   575篇
  2015年   380篇
  2014年   468篇
  2013年   763篇
  2012年   455篇
  2011年   539篇
  2010年   334篇
  2009年   284篇
  2008年   238篇
  2007年   216篇
  2006年   148篇
  2005年   106篇
  2004年   99篇
  2003年   105篇
  2002年   79篇
  2001年   61篇
  2000年   61篇
  1999年   77篇
  1998年   173篇
  1997年   138篇
  1996年   113篇
  1995年   92篇
  1994年   70篇
  1993年   65篇
  1992年   44篇
  1991年   49篇
  1990年   36篇
  1989年   36篇
  1988年   28篇
  1987年   34篇
  1986年   34篇
  1985年   36篇
  1984年   29篇
  1983年   31篇
  1982年   16篇
  1981年   16篇
  1980年   11篇
  1979年   10篇
  1978年   18篇
  1977年   20篇
  1976年   23篇
  1972年   8篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
The bivariate distributions are useful in simultaneous modeling of two random variables. These distributions provide a way to model models. The bivariate families of distributions are not much widely explored and in this article a new family of bivariate distributions is proposed. The new family will extend the univariate transmuted family of distributions and will be helpful in modeling complex joint phenomenon. Statistical properties of the new family of distributions are explored which include marginal and conditional distributions, conditional moments, product and ratio moments, bivariate reliability and bivariate hazard rate functions. The maximum likelihood estimation (MLE) for parameters of the family is also carried out. The proposed bivariate family of distributions is studied for the Weibull baseline distributions giving rise to bivariate transmuted Weibull (BTW) distribution. The new bivariate transmuted Weibull distribution is explored in detail. Statistical properties of the new BTW distribution are studied which include the marginal and conditional distributions, product, ratio and conditional momenst. The hazard rate function of the BTW distribution is obtained. Parameter estimation of the BTW distribution is also done. Finally, real data application of the BTW distribution is given. It is observed that the proposed BTW distribution is a suitable fit for the data used.  相似文献   
92.

Safety and reliability are absolutely important for modern sophisticated systems and technologies. Therefore, malfunction monitoring capabilities are instilled in the system for detection of the incipient faults and anticipation of their impact on the future behavior of the system using fault diagnosis techniques. In particular, state-of-the-art applications rely on the quick and efficient treatment of malfunctions within the equipment/system, resulting in increased production and reduced downtimes. This paper presents developments within Fault Detection and Diagnosis (FDD) methods and reviews of research work in this area. The review presents both traditional model-based and relatively new signal processing-based FDD approaches, with a special consideration paid to artificial intelligence-based FDD methods. Typical steps involved in the design and development of automatic FDD system, including system knowledge representation, data-acquisition and signal processing, fault classification, and maintenance related decision actions, are systematically presented to outline the present status of FDD. Future research trends, challenges and prospective solutions are also highlighted.

  相似文献   
93.
The Journal of Supercomputing - The buildup of huge data within business intelligence is essential because such data includes complete conceptual and technological stack in addition to raw and...  相似文献   
94.
The Journal of Supercomputing - Agile software development (ASD) and software product line (SPL) have shown significant benefits for software engineering processes and practices. Although both...  相似文献   
95.
The Journal of Supercomputing - This research presents the detection and mitigation of distributed denial of service (DDoS) in software defined networks (SDN). The proposed method consists of three...  相似文献   
96.
The Journal of Supercomputing - The Internet of Things is a rapidly evolving technology in which interconnected computing devices and sensors share data over the network to decipher different...  相似文献   
97.
Neural Computing and Applications - In order to provide benchmark performance for Urdu text document classification, the contribution of this paper is manifold. First, it provides a publicly...  相似文献   
98.
Microsystem Technologies - In this research a biologically inspired finger-like mechanism similar to human musculoskeletal system is developed based on Shape Memory Alloys (SMAs). SMA actuators are...  相似文献   
99.
Neural Computing and Applications - Autonomous driving research is an emerging area in the machine learning domain. Most existing methods perform single-task learning, while multi-task learning...  相似文献   
100.
Neural Computing and Applications - Preserving red-chili quality is of utmost importance in which the authorities demand quality techniques to detect, classify, and prevent it from impurities. For...  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