全文获取类型
收费全文 | 101篇 |
免费 | 1篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 3篇 |
金属工艺 | 8篇 |
机械仪表 | 9篇 |
建筑科学 | 5篇 |
轻工业 | 7篇 |
无线电 | 14篇 |
一般工业技术 | 21篇 |
冶金工业 | 16篇 |
自动化技术 | 17篇 |
出版年
2023年 | 2篇 |
2019年 | 2篇 |
2016年 | 3篇 |
2014年 | 1篇 |
2013年 | 9篇 |
2012年 | 2篇 |
2011年 | 2篇 |
2010年 | 3篇 |
2009年 | 2篇 |
2008年 | 5篇 |
2007年 | 1篇 |
2006年 | 6篇 |
2005年 | 4篇 |
2004年 | 4篇 |
2003年 | 1篇 |
2002年 | 6篇 |
2001年 | 6篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 6篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1976年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有102条查询结果,搜索用时 62 毫秒
101.
Many firms are considering Flexible Manufacturing Systems (FMS) as a means for increasing productivity, quality and profitability. In this paper a methodology for properly comparing and evaluating FMS's is presented, The appropriate financial criteria are presented. Mathematical models of different FMS's are presented. The important stochastic variables are determined. The principles of stochastic dominance, risk preference and the value of information; and a decision analysis cycle are used to evaluate the FMSY 相似文献
102.
Katharina Kruppa Itzhak I. Maor Frank Steinbach Vadim Beilin Meirav Mann-Lahav Mario Wolf Gideon S. Grader Armin Feldhoff 《Journal of the American Ceramic Society》2023,106(2):1170-1181
Oxide-based ceramics offer promising thermoelectric (TE) materials for recycling high-temperature waste heat, generated extensively from industrial sources. To further improve the functional performance of TE materials, their power factor should be increased. This can be achieved by nanostructuring and texturing the oxide-based ceramics creating multiple interphases and nanopores, which simultaneously increase the electrical conductivity and the Seebeck coefficient. The aim of this work is to achieve this goal by compacting electrospun nanofibers of calcium cobaltite Ca3Co4−xO9+δ, known to be a promising p-type TE material with good functional properties and thermal stability up to 1200 K in air. For this purpose, polycrystalline Ca3Co4−xO9+δ nanofibers and nanoribbons were fabricated by sol–gel electrospinning and calcination at intermediate temperatures to obtain small primary particle sizes. Bulk ceramics were formed by sintering pressed compacts of calcined nanofibers during TE measurements. The bulk nanofiber sample pre-calcined at 973 K exhibited an improved Seebeck coefficient of 176.5 S cm−1 and a power factor of 2.47 μW cm−1 K−2 similar to an electrospun nanofiber-derived ceramic compacted by spark plasma sintering. 相似文献