全文获取类型
收费全文 | 70篇 |
免费 | 0篇 |
专业分类
化学 | 57篇 |
晶体学 | 1篇 |
数学 | 9篇 |
物理学 | 3篇 |
出版年
2021年 | 2篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2015年 | 1篇 |
2013年 | 5篇 |
2012年 | 3篇 |
2011年 | 8篇 |
2010年 | 1篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 1篇 |
2006年 | 4篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 4篇 |
1997年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1991年 | 1篇 |
1988年 | 1篇 |
1983年 | 3篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1973年 | 1篇 |
1941年 | 2篇 |
1936年 | 1篇 |
1935年 | 4篇 |
1934年 | 2篇 |
1933年 | 2篇 |
1932年 | 1篇 |
1931年 | 2篇 |
1924年 | 1篇 |
排序方式: 共有70条查询结果,搜索用时 15 毫秒
1.
Christophe Cuny 《Journal of multivariate analysis》2006,97(8):1842-1869
Let (Xm,n)(m,n)∈Z2 be a Cp-valued wide sense stationary process. We study the prediction theory of such processes according to different total orders on Z2. In the case of a “rational order”, we give the spectral distribution of the resulting evanescent component and prove that for two different rational orders, the resulting evanescent components are mutually orthogonal. 相似文献
2.
Fruit juice authentication by <Superscript>1</Superscript>H NMR spectroscopy in combination with different chemometrics tools 总被引:1,自引:0,他引:1
Cuny M Vigneau E Le Gall G Colquhoun I Lees M Rutledge DN 《Analytical and bioanalytical chemistry》2008,390(1):419-427
To discriminate orange juice from grapefruit juice in a context of fraud prevention, 1H NMR data were submitted to different treatments to extract informative variables which were then analysed using multivariate
techniques. Averaging contiguous data points of the spectrum followed by logarithmic transformation improved the results of
the data analysis. Moreover, supervised variable selection methods gave better rates of classification of the juices into
the correct groups. Last, independent-component analysis gave better classification results than principal-component analysis.
Hence, ICA may be an efficient chemometric tool to detect differences in the 1H NMR spectra of similar samples, and so may be useful for authentication of foods. 相似文献
3.
4.
5.
We prove that the divisor function d(n) counting the number of divisors of the integer n is a good weighting function for the pointwise ergodic theorem. For any measurable dynamical system (X, A, ν, τ) and any f ∈ L p (ν), p > 1, the limit exists ν-almost everywhere. The proof is based on Bourgain’s method, namely the circle method based on the shift model. Using more elementary ideas we also obtain similar results for other arithmetical functions, like the θ(n) function counting the number of squarefree divisors of n and the generalized Euler totient function J s (n) = Σ d|n d s μ(n/d), s > 0.
相似文献
$$\mathop {\lim }\limits_{n \to \infty } \frac{1}{{\Sigma _{k = 1}^nd\left( k \right)}}\sum\limits_{k = 1}^n {d\left( k \right)f\left( {{\tau ^k}x} \right)} $$
6.
A new approach is proposed for exploring the low-energy structures of small to medium-sized aggregates of atoms and molecules. This approach uses the recently proposed reconnaissance metadynamics method [G. A. Tribello, M. Ceriotti, and M. Parrinello. Proc. Natl. Acad. Sci. U.S.A. 107(41), 17509 (2010)] in tandem with collective variables that describe the average structure of the coordination sphere around the atoms/molecules. We demonstrate this method on both Lennard-Jones and water clusters and show how it is able to quickly find the global minimum in the potential energy surface, while exploring the finite temperature free energy surface. 相似文献
7.
B. Batscha J. M. Kolthoff E. A. Pearson L. Cuny J. Golse und H. N. Thomson 《Fresenius' Journal of Analytical Chemistry》1933,94(1-2):44-46
Ohne Zusammenfassung 相似文献
8.
9.
10.
Ruthenium catalyzed ring opening cross-metathesis of resin-bound bicyclic alkenes with terminal aryl olefins was utilized
for the construction of a combinatorial library containing highly functionalized cyclopentane derivatives. The technology
described herein represents a convergent method for the diastereospecific synthesis of unique cyclopentane molecular scaffolds
useful for exploratory medicinal chemistry.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献