全文获取类型
收费全文 | 87篇 |
免费 | 2篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 5篇 |
金属工艺 | 1篇 |
机械仪表 | 2篇 |
建筑科学 | 2篇 |
矿业工程 | 1篇 |
能源动力 | 3篇 |
轻工业 | 10篇 |
无线电 | 5篇 |
一般工业技术 | 8篇 |
冶金工业 | 40篇 |
自动化技术 | 10篇 |
出版年
2024年 | 1篇 |
2022年 | 1篇 |
2018年 | 2篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 2篇 |
2011年 | 7篇 |
2010年 | 1篇 |
2009年 | 5篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 1篇 |
2000年 | 3篇 |
1998年 | 14篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1977年 | 1篇 |
1969年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有89条查询结果,搜索用时 15 毫秒
1.
2.
Rebecca C. Hedreen Jennifer L. Johnson Mack A. Lundy Peg Burnette Carol Perryman Guus Van Den Brekel 《国际互联网参考资料服务季刊》2013,18(2-3):167-195
ABSTRACT In April 2006, Alliance Library System and Online Programming for All Libraries partnered to start the Second Life Library 2.0 in the online world Second Life and in August 2006 purchased an island on the Teen grid of Teen Second Life. Second Life is a virtual world, a descendant of multiplayer online games. Educational institutions have recently been drawn into Second Life's robust economy and vibrant cultural life. The Second Life Library 2.0 works with librarians from around the world and with other educational partners such as TechSoup, WorldBridges, and the New Media Consortium. Second Life Library 2.0 provides “traditional” library services such as ready reference, book discussions, and search assistance, but, at heart, it explores what it means to be a virtual library in a virtual world. 相似文献
3.
4.
Samples of tripe obtained after commercial processing with alkaline hydrogen peroxide were compared with raw tripe for nutritional quality. A large number (108) of commercial tripe samples were found to vary markedly in their protein content from 8·4 to 19·3%. The moisture content was negatively correlated with the pH of the tripe samples. However, the amino acid analyses and rat bioassays indicated that the nutritional value of the protein was not significantly decreased by the processing. Oxidation of sulphur amino acids and formation of lysino-alanine were not evident. Thiamine was completely destroyed by the processing. 相似文献
5.
We present a novel algorithm for joint state-parameter estimation using sequential three dimensional variational data assimilation (3D Var) and demonstrate its application in the context of morphodynamic modelling using an idealised two parameter 1D sediment transport model. The new scheme combines a static representation of the state background error covariances with a flow dependent approximation of the state-parameter cross-covariances. For the case presented here, this involves calculating a local finite difference approximation of the gradient of the model with respect to the parameters. The new method is easy to implement and computationally inexpensive to run. Experimental results are positive with the scheme able to recover the model parameters to a high level of accuracy. We expect that there is potential for successful application of this new methodology to larger, more realistic models with more complex parameterisations. 相似文献
6.
7.
Every year between one and two million African children under five die of malaria. If one adds to this the contribution of malaria to all-cause infant mortality then clearly the burden of the disease is catastrophic--a disaster quietly happening each and every year. New tools are needed urgently to support those currently available for control of the disease. An effective vaccine remains elusive. This article outlines the potential contribution to malaria control services of satellite information, which is being used by resource managers in other sectors. In particular, it highlights the lessons which can be learned from early warning systems in other areas, especially those designed to respond to famine. An appendix provides a brief introduction to satellite data and their interpretation. 相似文献
8.
L. J. Perryman N. A. S. Foster D. R. Nicholls 《International Journal of Pressure Vessels and Piping》1995,61(2-3):593-608
For a number of years the Plant Specific Probabilistic Risk Assessment of Koeberg Nuclear Power Station has been used to support maintenance optimisation. By ranking all components by their importance to nuclear safety we have ensured that the most stringent maintenance regimes are only applied to components where it is absolutely necessary. Further, the overall level of safety is set by our licensing authority. This implies that a certain level of reliability is required for each component involved in safety. By monitoring performance and using the Bayesian analysis technique, it can be deduced whether an acceptable reliability is being achieved and whether a reduction in the maintenance frequency may be justified. 相似文献
9.
10.