全文获取类型
收费全文 | 1450篇 |
免费 | 53篇 |
国内免费 | 102篇 |
专业分类
化学 | 81篇 |
晶体学 | 1篇 |
力学 | 58篇 |
综合类 | 25篇 |
数学 | 1198篇 |
物理学 | 242篇 |
出版年
2023年 | 15篇 |
2022年 | 20篇 |
2021年 | 26篇 |
2020年 | 31篇 |
2019年 | 34篇 |
2018年 | 24篇 |
2017年 | 35篇 |
2016年 | 34篇 |
2015年 | 18篇 |
2014年 | 71篇 |
2013年 | 108篇 |
2012年 | 36篇 |
2011年 | 50篇 |
2010年 | 60篇 |
2009年 | 103篇 |
2008年 | 98篇 |
2007年 | 83篇 |
2006年 | 78篇 |
2005年 | 64篇 |
2004年 | 41篇 |
2003年 | 55篇 |
2002年 | 59篇 |
2001年 | 46篇 |
2000年 | 44篇 |
1999年 | 52篇 |
1998年 | 45篇 |
1997年 | 45篇 |
1996年 | 32篇 |
1995年 | 17篇 |
1994年 | 23篇 |
1993年 | 11篇 |
1992年 | 13篇 |
1991年 | 16篇 |
1990年 | 12篇 |
1989年 | 9篇 |
1988年 | 9篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 11篇 |
1983年 | 9篇 |
1982年 | 11篇 |
1981年 | 6篇 |
1980年 | 4篇 |
1979年 | 9篇 |
1978年 | 4篇 |
1977年 | 9篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1973年 | 4篇 |
排序方式: 共有1605条查询结果,搜索用时 15 毫秒
61.
Given a subset E of convex functions from
into
which satisfy growth conditions of order p>1 and an open bounded subset
of
, we establish the continuity of a map μΦμ from the set of all Young measures on
equipped with the narrow topology into a set of suitable functionals defined in
and equipped with the topology of Γ-convergence. Some applications are given in the setting of periodic and stochastic homogenization. 相似文献
62.
63.
Tero Kilpelä inen Xiao Zhong 《Proceedings of the American Mathematical Society》2002,130(6):1681-1688
We show that sets of Hausdorff measure zero are removable for -Hölder continuous solutions to quasilinear elliptic equations similar to the -Laplacian. The result is optimal. We also treat larger sets in terms of a growth condition. In particular, our results apply to quasiregular mappings.
64.
Multi-Fractal Formalism for Quasi-Self-Similar Functions 总被引:1,自引:0,他引:1
The study of multi-fractal functions has proved important in several domains of physics. Some physical phenomena such as fully developed turbulence or diffusion limited aggregates seem to exhibit some sort of self-similarity. The validity of the multi-fractal formalism has been proved to be valid for self-similar functions. But, multi-fractals encountered in physics or image processing are not exactly self-similar. For this reason, we extend the validity of the multi-fractal formalism for a class of some non-self-similar functions. Our functions are written as the superposition of similar structures at different scales, reminiscent of some possible modelization of turbulence or cascade models. Their expressions look also like wavelet decompositions. For the computation of their spectrum of singularities, it is unknown how to construct Gibbs measures. However, it suffices to use measures constructed according the Frostman's method. Besides, we compute the box dimension of the graphs. 相似文献
65.
For a translation invariant Gibbs measure on the configuration space X of a lattice finite spin system, we consider the set X
of generic points. Using a Breiman type convergence theorem on the set X
of generic points of an arbitrary translation invariant probability measure on X, we evaluate the Hausdorff dimension of the set X
with respect to any metric out of a wide class of scale metrics on X (including Billingsley metrics generated by Gibbs measures). 相似文献
66.
Roman Frič 《Czechoslovak Mathematical Journal》2002,52(4):861-874
We show that each sequentially continuous (with respect to the pointwise convergence) normed measure on a bold algebra of fuzzy sets (Archimedean MV-algebra) can be uniquely extended to a sequentially continuous measure on the generated ukasiewicz tribe and, in a natural way, the extension is maximal. We prove that for normed measures on ukasiewicz tribes monotone (sequential) continuity implies sequential continuity, hence the assumption of sequential continuity is not restrictive. This yields a characterization of the ukasiewicz tribes as bold algebras absolutely sequentially closed with respect to the extension of probabilities. The result generalizes the relationship between fields of sets and the generated -fields discovered by J. Novák. We introduce the category of bold algebras and sequentially continuous homomorphisms and prove that ukasiewicz tribes form an epireflective subcategory. The restriction to fields of sets yields the epireflective subcategory of -fields of sets. 相似文献
67.
Mochi M. Pacelli G. Recchioni M. C. Zirilli F. 《Journal of Optimization Theory and Applications》1999,100(1):29-57
In this paper, we consider an inverse problem for a class of two-dimensional diffusion equations with piecewise constant coefficients. This problem is studied using an explicit formula for the relevant spectral measures and an asymptotic expansion of the solution of the diffusion equations. A numerical method that reduces the inverse problem to a sequence of nonlinear least-square problems is proposed and tested on synthetic data. 相似文献
68.
Consider a closed Jackson type network in which each queue has a single exponential server. Assume that N customers are moving among k queues. We establish simple closed form bounds on the network throughput (both lower and upper), which are sharper than those that are currently available. Numerical evaluation indicates that the improvements are significant. 相似文献
69.
Zhijian Wu 《Proceedings of the American Mathematical Society》1999,127(11):3243-3249
We establish a capacitary strong type estimate for Lipschitz space and characterize the related Carleson measures.
70.
Steven Arnold 《Journal of multivariate analysis》1984,15(3):325-335
Fairly general sufficient conditions are given to guarantee that invariant tests about means in the multivariate linear model and the repeated measures model have the correct asymptotic size when the normal assumption under which the tests are derived is relaxed. These conditions are the same as Huber's condition which guarantees asymptotic validity of the size of the F-test for the univariate linear model. 相似文献