全文获取类型
收费全文 | 1102篇 |
免费 | 44篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 13篇 |
综合类 | 1篇 |
化学工业 | 288篇 |
金属工艺 | 31篇 |
机械仪表 | 49篇 |
建筑科学 | 22篇 |
能源动力 | 97篇 |
轻工业 | 44篇 |
水利工程 | 9篇 |
无线电 | 106篇 |
一般工业技术 | 263篇 |
冶金工业 | 64篇 |
原子能技术 | 9篇 |
自动化技术 | 152篇 |
出版年
2024年 | 3篇 |
2023年 | 17篇 |
2022年 | 36篇 |
2021年 | 54篇 |
2020年 | 46篇 |
2019年 | 42篇 |
2018年 | 73篇 |
2017年 | 47篇 |
2016年 | 63篇 |
2015年 | 32篇 |
2014年 | 44篇 |
2013年 | 103篇 |
2012年 | 57篇 |
2011年 | 65篇 |
2010年 | 61篇 |
2009年 | 64篇 |
2008年 | 61篇 |
2007年 | 61篇 |
2006年 | 26篇 |
2005年 | 24篇 |
2004年 | 21篇 |
2003年 | 22篇 |
2002年 | 15篇 |
2001年 | 11篇 |
2000年 | 10篇 |
1999年 | 5篇 |
1998年 | 12篇 |
1997年 | 6篇 |
1996年 | 8篇 |
1995年 | 7篇 |
1994年 | 13篇 |
1993年 | 8篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1989年 | 2篇 |
1987年 | 4篇 |
1984年 | 5篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 4篇 |
1979年 | 4篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有1148条查询结果,搜索用时 93 毫秒
1.
Kumar S. Ganesh Sridhar S. S. Hussain Azham Manikanthan S. V. Padmapriya T. 《Multimedia Tools and Applications》2022,81(7):9091-9109
Multimedia Tools and Applications - Discovering the relevant web services for specific applications in the dynamically changing business world becomes very critical. Researchers have used many... 相似文献
2.
Wireless Personal Communications - In this paper, cooperative communication (CC) assisted cognitive wireless sensor network (CWSN) is presented for monitoring health and activity of an end-user in... 相似文献
3.
4.
Polymer Bulletin - Depletion of the petroleum resources and poor flame-retardant properties of the epoxy resins drive researchers to develop an epoxy resin with good heat stability from... 相似文献
5.
A Synthetic Transcriptional Activator of Genes Associated with the Retina in Human Dermal Fibroblasts 下载免费PDF全文
6.
Agrawal Prachi Ganesh Talari Mohamed Ali Wagdy 《Neural computing & applications》2021,33(11):5989-6008
Neural Computing and Applications - To obtain the optimal set of features in feature selection problems is the most challenging and prominent problem in machine learning. Very few human-related... 相似文献
7.
8.
9.
Youngseok Lee Cheolmin Park Nagarajan Balaji Youn-Jung Lee Vinh Ai Dao 《Israel journal of chemistry》2015,55(10):1050-1063
Over the past few decades, crystalline silicon solar cells have been extensively studied due to their high efficiency, high reliability, and low cost. In addition, these types of cells lead the industry and account for more than half of the market. For the foreseeable future, Si will still be a critical material for photovoltaic devices in the solar cell industry. In this paper, we discuss key issues, cell concepts, and the status of recent high-efficiency crystalline silicon solar cells. 相似文献
10.
Three plain weave fabric composite analysis models are presented for the prediction of the on-axes thermal expansion coefficients. These are two-dimensional models in the sense that the actual strand cross-sectional geometry, strand undulation and the presence of a gap between the adjacent strands are taken into account. In the first two models, termed refined models, the representative unit cell is discretised into slices and elements and analysed. In the third method, a closed-form solution is presented. In this case, the representative unit cell is idealised as a crossply laminate and analysed. The relative merits and demerits of the models are also discussed. The predicted results are compared with the experimental values. A good correlation is observed. 相似文献