全文获取类型
收费全文 | 49篇 |
免费 | 3篇 |
专业分类
化学 | 45篇 |
数学 | 2篇 |
物理学 | 5篇 |
出版年
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 2篇 |
2011年 | 3篇 |
2008年 | 1篇 |
2005年 | 1篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2002年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1968年 | 1篇 |
1955年 | 2篇 |
排序方式: 共有52条查询结果,搜索用时 78 毫秒
11.
U. VeereswaraRao U. Muralikrishna und G. GopalaRao 《Fresenius' Journal of Analytical Chemistry》1955,145(1):12-16
Ohne Zusammenfassung 相似文献
12.
Yue-Wei Yin Muralikrishna Raju Wei-Jin Hu Xiao-Jun Weng Ke Zou Jun Zhu Xiao-Guang Li Zhi-Dong Zhang Qi Li 《Frontiers of Physics》2012,7(4):380-385
Magnetic tunnel junctions with ferroelectric barriers, often referred to as multiferroic tunnel junctions, have been proposed recently to display new functionalities and new device concepts. One of the notable predictions is that the combination of two charge polarizing states and the parallel and antiparallel magnetic states could make it a four resistance state device. We have recently studied the ferroelectric tunneling using a scanning probe technique and multiferroic tunnel junctions using ferromagnetic La0.7Ca0.3MnO3 and La0.7Sr0.3MnO3 as the electrodes and ferroelectric (Ba, Sr)TiO3 as the barrier in trilayer planner junctions. We show that very thin (Ba, Sr)TiO3 films can sustain ferroelectricity up till room temperature. The multiferroic tunnel junctions show four resistance states as predicted and can operate at room temperatures. 相似文献
13.
Bayesian image restoration,with two applications in spatial statistics 总被引:35,自引:0,他引:35
Julian Besag Jeremy York Annie Mollié 《Annals of the Institute of Statistical Mathematics》1991,43(1):1-20
There has been much recent interest in Bayesian image analysis, including such topics as removal of blur and noise, detection of object boundaries, classification of textures, and reconstruction of two- or three-dimensional scenes from noisy lower-dimensional views. Perhaps the most straightforward task is that of image restoration, though it is often suggested that this is an area of relatively minor practical importance. The present paper argues the contrary, since many problems in the analysis of spatial data can be interpreted as problems of image restoration. Furthermore, the amounts of data involved allow routine use of computer intensive methods, such as the Gibbs sampler, that are not yet practicable for conventional images. Two examples are given, one in archeology, the other in epidemiology. These are preceded by a partial review of pixel-based Bayesian image analysis.An earlier version of this article was presented at the symposium on the Analysis of Statistical Information held in the Institute of Statistical Mathematics, Tokyo during December 5–8, 1989.This research was carried out partly at the University of Durham, U.K., with the support of an award by the Complex Stochastic Systems Initiative of the Science and Engineering Research Council. 相似文献
14.
A spectrophotometric method for the determination of 2,5-dichloro-, 2,6-dichloro- and 2,3,5,6-tetrachloro-1,4-benzoquinones is based on the yellow products of their reaction with morpholine, thiomorpholine and piperazine in chloroform. 相似文献
15.
Conditions were established for the determination of ascorbic acid using phsophovanadotungstic acid as reagent. The method was applied to the determination of ascorbic acid in pure form, pharmaceutical preparations and fruit juices. The method is sensitive (2-24 micrograms ml-1 of ascorbic acid) and rapid and tolerates the presence of common ingredients usually found in fruit juices. The results obtained with the proposed method showed good agreement with those given by the standard method. 相似文献
16.
17.
18.
A simple indirect titrimetric determination of uric acid with manganese(IV) sulfate has been proposed. The method is stoichiometric and accurate and can be conveniently adapted for the assay of urinary uric acid. 相似文献
19.
20.