全文获取类型
收费全文 | 568篇 |
免费 | 14篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 217篇 |
金属工艺 | 9篇 |
机械仪表 | 6篇 |
建筑科学 | 35篇 |
能源动力 | 94篇 |
轻工业 | 18篇 |
无线电 | 12篇 |
一般工业技术 | 68篇 |
冶金工业 | 40篇 |
原子能技术 | 5篇 |
自动化技术 | 77篇 |
出版年
2021年 | 8篇 |
2020年 | 5篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 11篇 |
2016年 | 6篇 |
2015年 | 8篇 |
2014年 | 10篇 |
2013年 | 68篇 |
2012年 | 19篇 |
2011年 | 22篇 |
2010年 | 21篇 |
2009年 | 20篇 |
2008年 | 16篇 |
2007年 | 12篇 |
2006年 | 11篇 |
2005年 | 22篇 |
2004年 | 22篇 |
2003年 | 17篇 |
2002年 | 23篇 |
2001年 | 10篇 |
2000年 | 12篇 |
1999年 | 14篇 |
1998年 | 17篇 |
1997年 | 21篇 |
1996年 | 17篇 |
1995年 | 7篇 |
1994年 | 16篇 |
1993年 | 14篇 |
1992年 | 14篇 |
1991年 | 5篇 |
1990年 | 8篇 |
1989年 | 8篇 |
1988年 | 6篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 5篇 |
1981年 | 8篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 6篇 |
1977年 | 2篇 |
1976年 | 6篇 |
1975年 | 6篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1966年 | 3篇 |
1958年 | 2篇 |
排序方式: 共有582条查询结果,搜索用时 140 毫秒
581.
In this paper, the choice of optimal set-points and cost minimizing control strategies for the denitrification process in an activated sludge process are treated. In order to compare different criterion functions, simulations utilizing the COST/IWA simulation benchmark are considered. By means of operational maps the results are visualized. It is found that it is easy to distinguish set-point areas where the process can be said to be efficiently controlled in an economic sense. The characteristics of these set-point areas depend on the chosen effluent nitrate set-point as well as the distribution of the different operating costs. It is also discussed how efficient control strategies may be accomplished. 相似文献
582.
Bengt Sandblad Jan Gulliksen Carl borg Inger Boivie Jenny Persson Bengt G ransson Iordanis Kavathatzopoulos Stefan Blomkvist sa Cajander 《Behaviour & Information Technology》2003,22(6):375-387
Work environment and occupational health problems of different nature are constantly increasing in computer supported work. Most efforts to improve the work environment are focused primarily on physical aspects, and to some extent on psychosocial aspects. Mental workload and cognitive problems are of a more complex nature, more difficult to measure and provide efficient solutions to, and are more seldom studied or solved. Solutions to work environment problems are usually applied to already existing work situations through improved equipment and work place design, health programmes, education, reorganizations, etc. The problems are seldom prevented by means of applying relevant methods early in the systems development process, before the artefacts have been designed and implemented. This paper, and the following papers of this special issue, will focus on the need to integrate different interdisciplinary methods at different phases in the development process of computerized support systems, with the ultimate goal to prevent work environment problems and decrease the health risks to the users. 相似文献