全文获取类型
收费全文 | 77篇 |
免费 | 2篇 |
专业分类
化学工业 | 8篇 |
机械仪表 | 1篇 |
轻工业 | 5篇 |
无线电 | 7篇 |
一般工业技术 | 7篇 |
冶金工业 | 43篇 |
原子能技术 | 6篇 |
自动化技术 | 2篇 |
出版年
2017年 | 2篇 |
2016年 | 1篇 |
2013年 | 2篇 |
2012年 | 3篇 |
2011年 | 3篇 |
2010年 | 1篇 |
2009年 | 5篇 |
2008年 | 6篇 |
2007年 | 5篇 |
2006年 | 3篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 5篇 |
1992年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1981年 | 1篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1973年 | 2篇 |
1972年 | 1篇 |
1969年 | 1篇 |
1925年 | 1篇 |
1923年 | 1篇 |
排序方式: 共有79条查询结果,搜索用时 10 毫秒
1.
2.
The homogeneity of comminuted composites of 20 lb samples of apples, cabbage, and green beans containing field-incurred residues of p, p'-methoxychlor was studied to determine whether a 5 min comminution in a 40 qt vertical cutter mixer produces a homogeneous composite and whether the size of test portions used accurately represents the composite. Duplicate test portions of 100, 50, 25, 10, 5, and 2 g taken from each of 6 separate sections of the mixer were analyzed by standard pesticide residue methodology for p, p'-methoxychlor. Results of this study confirmed that comminution of fresh produce in a 40 qt vertical cutter mixer, according to instructions described in the U.S. Food and Drug Administration's Pesticide Analytical Manual, Volume I, Section 203B, produces a homogeneous composite. No significant differences were found in the data for the 3 crops taken from the 6 sections of the mixer. Test portion weights of 100, 50, and 25 g produced equivalent results for all 3 crops. Statistically significant differences were observed for cabbage at 2, 5, and 10 g and for green beans at 2 g. 相似文献
3.
S.-R. G. Christopoulos D. C. Parfitt E. N. Sgourou C. A. Londos R. V. Vovk A. Chroneos 《Journal of Materials Science: Materials in Electronics》2016,27(11):11268-11272
Irradiation induced defects in silicon are technologically important as they impact the electronic properties. Calculations based on density functional theory employing hybrid functionals have been previously used to investigate the structures and relative energies of defect clusters formed between vacancies, self-interstitials, carbon and oxygen atoms in silicon. In this study we employ a model to calculate the relative concentrations of carbon related defects in silicon. It is calculated that the carbon content has a significant impact upon the concentration of carbon-related defects. The CiCs defect is the most populous for all the conditions considered followed by the CiOiSiI and the CiOi defects. CiOiSiI and the CiOi become increasingly important for silicon with high carbon concentrations. 相似文献
4.
5.
6.
7.
AM Parfitt 《Canadian Metallurgical Quarterly》1998,13(8):1213-1220
8.
The stability of concentrated colloidal dispersions of submicron carbon black particles in solutions of Aerosol-OT in p-xylene is discussed. Electrostatic and electrodynamic forces compete leading to coagulation of the primary particles resulting in increasing particle radius. Growth continues until electrostatic stabilisation dominates. These stable dispersions are characterised by particle size, electrophoresis and Theological measurements. The effect of ionic strength is studied and discussed in terms of fundamental electric double layer theory. This work is of significance to practical concentrated dispersions in media where the dielectric constant is very low 相似文献
9.
10.