全文获取类型
收费全文 | 161篇 |
免费 | 10篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 41篇 |
金属工艺 | 3篇 |
机械仪表 | 3篇 |
建筑科学 | 3篇 |
能源动力 | 6篇 |
轻工业 | 19篇 |
水利工程 | 3篇 |
石油天然气 | 1篇 |
无线电 | 11篇 |
一般工业技术 | 49篇 |
冶金工业 | 19篇 |
原子能技术 | 1篇 |
自动化技术 | 11篇 |
出版年
2023年 | 2篇 |
2022年 | 7篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 6篇 |
2018年 | 4篇 |
2017年 | 11篇 |
2016年 | 11篇 |
2015年 | 7篇 |
2014年 | 4篇 |
2013年 | 7篇 |
2012年 | 5篇 |
2011年 | 7篇 |
2010年 | 12篇 |
2009年 | 7篇 |
2008年 | 8篇 |
2007年 | 4篇 |
2006年 | 3篇 |
2005年 | 5篇 |
2004年 | 7篇 |
2003年 | 4篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 8篇 |
1997年 | 4篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 3篇 |
1980年 | 4篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1972年 | 1篇 |
1965年 | 1篇 |
1959年 | 1篇 |
排序方式: 共有172条查询结果,搜索用时 15 毫秒
171.
A knowledge-based approach to design for manufacturability 总被引:4,自引:1,他引:3
A. R. Venkatachalam Joseph M. Mellichamp David M. Miller 《Journal of Intelligent Manufacturing》1993,4(5):355-366
In the light of growing global competition, organizations around the world today are constantly under pressure to produce high-quality products at an economical price. The integration of design and manufacturing activities into one common engineering effort has been recognized as a key strategy for survival and growth. Design for manufacturability (DFM) is an approach to design that fosters the simultaneous involvement of product design and process design. The implementation of the DFM approach requires the collaboration of both the design and manufacturing functions within an organization. Many reasons can be cited for the inability to implement the DFM approach effectively, including: lack of interdisciplinary expertise of designers; inflexibility in organizational structure, which hinders interaction between design and manufacturing functions; lack of manufacturing cost information at the design phase; and absence of integrated engineering effort intended to maximize functional and manufacturability objectives. The purpose of this research is to show how expert systems methodology could be used to provide manufacturability expertise during the design phase of a product. An object- and rule-based expert system has been developed that has the capability: (1) to make process selection decisions based on a set of design and production parameters to achieve cost-effective manufacture; and (2) to estimate manufacturing cost based on the identified processes. The expertise for primary process selection is developed for casting and forging processes. The specialized processes considered are die casting, investment casting, sand casting, precision forging, open die forging and conventional die forging. The processes considered for secondary process selection are end milling and drilling. The cost estimation expertise is developed for the die casting process, the milling and drilling operations, and the manual assembly operations. The results obtained from the application of the expert system suggest that the use of expert systems methodology is a feasible method for implementing the DFM approach. 相似文献
172.
The electrochemical dissolution of nickel in sulphuric acid by alternating current has been studied. Experiments with sine wave a.c. (50 cps) have shown that the dissolution efficiency increases with increase in concentration of sulphuric acid as well as current density. However, the dissolution efficiency increases with increase in concentration of sulphuric acid but decreases with increase in current density when square wave type a.c. of low frequency (0.5 cps) is used. Increase of frequency of square wave a.c. increases the dissolution efficiency. 相似文献