全文获取类型
收费全文 | 97篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
化学 | 29篇 |
数学 | 54篇 |
物理学 | 15篇 |
出版年
2023年 | 1篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 8篇 |
2012年 | 6篇 |
2011年 | 12篇 |
2010年 | 2篇 |
2009年 | 4篇 |
2008年 | 6篇 |
2007年 | 7篇 |
2006年 | 9篇 |
2005年 | 4篇 |
2004年 | 7篇 |
2003年 | 6篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1996年 | 1篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1977年 | 1篇 |
1974年 | 1篇 |
1967年 | 1篇 |
1960年 | 1篇 |
排序方式: 共有98条查询结果,搜索用时 31 毫秒
1.
Semyon Alesker 《Geometric And Functional Analysis》2007,17(4):1321-1341
This is a non-technical survey of a recent theory of valuations on manifolds constructed in [A10], [A11], [AF] and [A12],
and actually a guide to this series of articles. We also review some recent related results obtained by a number of people.
Received: February 2006, Revision: June 2006, Accepted: June 2006 相似文献
2.
3.
Semyon Rabinovich 《Accreditation and quality assurance》2007,12(11):603-608
The “Guide to the expression of uncertainty in measurement” (GUM) is an extremely important document. It unifies methods for
calculating measurement uncertainty and enables the consistent interpretation and comparison of measurement results, regardless
of who obtained these measurements and where they were obtained. Since the document was published in 1995, it has been realised
that its recommendations do not properly address an important class of measurements, namely, non-linear indirect measurements.
This drawback prompted the initiation of the revision of the GUM in the Working Group 1 of the Joint Committee for Guides
in Metrology, which commenced in October 2006. The upcoming revision of the GUM provides the metrological community with an
opportunity to improve this important document, in particular, to reflect developments in metrology that have occurred since
the first GUM publication in 1995. Thus, a discussion of the directions for this revision is important and timely. By identifying
several shortcomings of the GUM and proposing directions for its improvement, we hope this article will contribute to this
discussion.
Papers published in this section do not necessarily reflect the opinion of the Editors, the Editorial Board and the Publisher. 相似文献
4.
Semyon Dyatlov 《Communications in Mathematical Physics》2011,306(1):119-163
We provide a rigorous definition of quasi-normal modes for a rotating black hole. They are given by the poles of a certain
meromorphic family of operators and agree with the heuristic definition in the physics literature. If the black hole rotates
slowly enough, we show that these poles form a discrete subset of
\mathbb C{\mathbb C} . As an application we prove that the local energy of linear waves in that background decays exponentially once orthogonality
to the zero resonance is imposed. 相似文献
5.
Semyon Rafalson 《Journal of Approximation Theory》1996,87(3):328-337
Fourier–Jacobi series with nonnegative Fourier–Jacobi coefficients are considered. Under special restrictions on the Jacobi weight function, we establish in terms of Fourier–Jacobi coefficients a necessary and sufficient condition in order that the sum of the Fourier–Jacobi series should possess certain structural properties. 相似文献
6.
Semyon B. Yakubovich 《Journal of Approximation Theory》2004,131(2):175
We establish analogs of the Hausdorff–Young and Riesz–Kolmogorov inequalities and the norm estimates for the Kontorovich–Lebedev transformation and the corresponding convolution. These classical inequalities are related to the norms of the Fourier convolution and the Hilbert transform in Lp spaces, 1p∞. Boundedness properties of the Kontorovich–Lebedev transform and its convolution operator are investigated. In certain cases the least values of the norm constants are evaluated. Finally, it is conjectured that the norm of the Kontorovich–Lebedev operator is equal to . It confirms, for instance, by the known Plancherel-type theorem for this transform when p=2. 相似文献
7.
Let Lq (1q<∞) be the space of functions f measurable on I=[−1,1] and integrable to the power q, with normL∞ is the space of functions measurable on I with normWe denote by AC the set of all functions absolutely continuous on I. For nN, q[1,∞] we setWn,q={f:f(n−1)AC, f(n)Lq}.In this paper, we consider the problem of accuracy of constants A, B in the inequalities (1) || f(m)||qA|| f||p+B|| f(m+k+1)||r, mN, kW; p,q,r[1,∞], fWm+k+1,r. 相似文献
8.
9.
We provide a representation for the nonmyopic optimal portfolio of an agent consuming only at the terminal horizon when the single state variable follows a general diffusion process and the market consists of one risky asset and a risk-free asset. The key term of our representation is a new object that we call the “rate of macroeconomic fluctuation” whose properties are fundamental for the portfolio dynamics. We show that, under natural cyclicality conditions, (i) the agent’s hedging demand is positive (negative) when the product of his prudence and risk tolerance is below (above) two and (ii) the portfolio weights decrease in risk aversion. We apply our results to study a general continuous-time capital asset pricing model and show that under the same cyclicality conditions, the market price of risk is countercyclical and the price of the risky asset exhibits excess volatility. 相似文献
10.
Yoav D. Livney Ory Ramon Ellina Kesselman Uri Cogan Shimon Mizrahi Yachin Cohen 《Journal of Polymer Science.Polymer Physics》2001,39(22):2740-2750
The swelling of dextran gels (Sephadex) in salt solutions with a water activity of 0.937, compared with the swelling in pure water, exhibited anion specificity as evidenced by an increased swelling ratio in the following order: Na2SO4 < H2O < NaCl < NaSCN. The swelling ratio showed a good linear correlation with the osmotic pressure of dextran (500 kD) in these solutions. The salt‐concentration difference (imbalance) between the polymer‐solution side of the membrane and the polymer‐free permeate side during the osmotic‐pressure measurements positively correlated with the effect of the salt on the polymer osmotic pressure. These phenomena conform to Hofmeister‐type (or lyotropic) behavior. The diminishing augmentation of dextran osmotic pressure and the change in the salt‐concentration imbalance with rising NaSCN concentration imply a positive preferential interaction and adsorption of the salt onto the polymer. © 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 39: 2740–2750, 2001 相似文献