全文获取类型
收费全文 | 47篇 |
免费 | 1篇 |
专业分类
化学 | 33篇 |
力学 | 1篇 |
数学 | 7篇 |
物理学 | 7篇 |
出版年
2019年 | 1篇 |
2018年 | 2篇 |
2015年 | 1篇 |
2014年 | 1篇 |
2013年 | 2篇 |
2012年 | 1篇 |
2011年 | 1篇 |
2010年 | 1篇 |
2009年 | 2篇 |
2008年 | 4篇 |
2007年 | 1篇 |
2005年 | 1篇 |
2004年 | 1篇 |
2002年 | 3篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1996年 | 3篇 |
1988年 | 2篇 |
1985年 | 1篇 |
1965年 | 1篇 |
1942年 | 1篇 |
1941年 | 2篇 |
1939年 | 1篇 |
1935年 | 2篇 |
1930年 | 2篇 |
1929年 | 1篇 |
1927年 | 3篇 |
1926年 | 1篇 |
排序方式: 共有48条查询结果,搜索用时 16 毫秒
1.
B. Schoofs T. Mouganie B. A. Glowacki V. Cloet S. Hoste I. Van Driessche 《Journal of Sol-Gel Science and Technology》2007,41(2):113-122
Today, the deposition of coated conductors on a variety of substrates is often performed using a vacuum or low pressure technique.
However, obtaining uninterrupted deposition at high speed, increasing flexibility in composition and attaining independence
of geometric constraints of the substrates are areas in which vacuum techniques will need sustained development in order to
answer industrial demands. The development of the next generation of deposition methods, based on deposition under atmospheric
environment and from aqueous precursor solutions is a real challenge. This work describes the deposition of thin NdBa2Cu3O7-y layers on SrTiO3 single crystals based on a new sol-gel dip coating process using aqueous precursor solutions. Two inorganic aqueous sol-gel
routes were investigated, a metal nitrate–citric acid based and a metal acetate–triethanol amine based solution. Using detailed
thermal analysis, it is shown that adjusting the different parameters during thermal treatment can be used to control the
morphology of the films. Also special attention is given to the microstructure of the thin film because of its relevance to
the superconducting transport properties of the coated conductor system. 相似文献
2.
Arvid Uhler 《Acta Mathematica》1929,53(1):131-180
Ohne Zusammenfassung 相似文献
3.
Improved Spectral Coverage and Fluorescence Quenching in Donor–acceptor Systems Involving Indolo[3‐2‐b]carbazole and Boron‐dipyrromethene or Diketopyrrolopyrrole 下载免费PDF全文
Adis Khetubol Sven Van Snick Melissa L. Clark Eduard Fron Eduardo Coutiño‐González Arvid Cloet Koen Kennes Yuliar Firdaus Maarten Vlasselaer Volker Leen Wim Dehaen Mark Van der Auweraer 《Photochemistry and photobiology》2015,91(3):637-653
A novel π‐conjugated triad and a polymer incorporating indolo[3,2‐b]‐carbazole (ICZ) and 4,4‐difluoro‐4‐bora‐3a,4a‐diaza‐s‐indacene (BODIPY) were synthesized via a Sonogashira coupling. Compared to the parent BODIPY the absorption and fluorescence spectrum were for both compounds broader and redshifted. The redshift of the fluorescence and the decrease of the fluorescence quantum yield and decay time upon increasing solvent polarity were attributed to the formation of a partial charge‐transfer state. Upon excitation in the ICZ absorption band the ICZ fluorescence was quenched in both compounds mainly due to energy transfer to the BODIPY moiety. In a similar ICZ–π–DPP polymer (where DPP is diketopyrrolopyrrole), a smaller redshift of the absorption and fluorescence spectra compared to the parent DPP was observed. A less efficient quenching of the ICZ fluorescence in the ICZ–π–DPP polymer could be related to the unfavorable orientation of the transition dipoles of ICZ and DPP. The rate constant for energy transfer was for all compounds an order of magnitude smaller than predicted by Förster theory. While in a solid film of the triad a further redshift of the absorption maximum of nearly 100 nm was observed, no such shift was observed for the ICZ–π–BODIPY polymer. 相似文献
4.
5.
6.
David A. Naylor Arvid A. Schultz Stephen E. Bougerolle T. Alan Clark 《Mikrochimica acta》1988,95(1-6):289-293
A new method is described for eliminating channel spectra from data obtained with a high resolution Fourier transform spectrometer. 相似文献
7.
Waldemar M. Fischer Arvid Schmidt M. Rabinowitsch A. S. Fokin und I. A. Atanasiu 《Fresenius' Journal of Analytical Chemistry》1930,79(9):358-360
Ohne Zusammenfassung 相似文献
8.
9.
Arvid Perego 《Mathematische Annalen》2010,346(2):367-391
The aim of this work is to show that the moduli space M
10 introduced by O’Grady is a 2-factorial variety. Namely, M
10 is the moduli space of semistable sheaves with Mukai vector v: = (2, 0, −2) in
Hev(X,\mathbbZ){H^{ev}(X,\mathbb{Z})} on a projective K3 surface X. As a corollary to our construction, we show that the Donaldson morphism gives a Hodge isometry between v^{v^{\perp}} (sublattice of the Mukai lattice of X) and its image in
H2 ([(M)\tilde]10, \mathbbZ){H^{2} (\widetilde{M}_{10}, \mathbb{Z})}, lattice with respect to the Beauville form of the 10-dimensional irreducible symplectic manifold [(M)\tilde]10{\widetilde{M}_{10}}, obtained as symplectic resolution of M
10. Similar results are shown for the moduli space M
6 introduced by O’Grady to produce its 6-dimensional example of irreducible symplectic variety. 相似文献
10.
Linghua Chen Espen Robstad Jakobsen Arvid Naess 《Advances in Computational Mathematics》2018,44(3):693-721
We study a numerical method to compute probability density functions of solutions of stochastic differential equations. The method is sometimes called the numerical path integration method and has been shown to be fast and accurate in application oriented fields. In this paper we provide a rigorous analysis of the method that covers systems of equations with unbounded coefficients. Working in a natural space for densities, L 1, we obtain stability, consistency, and new convergence results for the method, new well-posedness and semigroup generation results for the related Fokker-Planck-Kolmogorov equation, and a new and rigorous connection to the corresponding probability density functions for both the approximate and the exact problems. To prove the results we combine semigroup and PDE arguments in a new way that should be of independent interest. 相似文献