全文获取类型
收费全文 | 128篇 |
免费 | 7篇 |
国内免费 | 2篇 |
专业分类
化学 | 81篇 |
晶体学 | 1篇 |
力学 | 12篇 |
数学 | 21篇 |
物理学 | 22篇 |
出版年
2023年 | 3篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 2篇 |
2015年 | 3篇 |
2013年 | 6篇 |
2012年 | 8篇 |
2011年 | 10篇 |
2010年 | 4篇 |
2009年 | 5篇 |
2008年 | 6篇 |
2007年 | 7篇 |
2006年 | 9篇 |
2005年 | 9篇 |
2004年 | 2篇 |
2003年 | 4篇 |
2002年 | 8篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1974年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有137条查询结果,搜索用时 140 毫秒
131.
Recent developments in meshless numerical methods have led to algorithms that can be used to solve arbitrarily large problems
without the support of a connected mesh, and without the computational cost and numerical ill-conditioning issues usually
associated with such solution techniques. This work applies the Local Hermitian Interpolation (LHI) method, based on local
interpolation with Radial Basis Functions (RBFs), to the solution of 3D unsaturated porous media problems. The proposed implementation
is capable of handling real soil properties, provided either as an analytical function or as a series of pointwise measurements.
The technique is implemented with implicit and explicit timestepping, and is validated against two transient Richards’ equation
models, of which one has a known analytical solution. In addition, a real-world infiltration problem based on a saturated–unsaturated
formulation is modelled, using a realistic variation of soil properties with water-pressure. 相似文献
132.
A method for carrying out strain partition under load is described. An ultrasonic device and a suitable extensometer are used
simultaneously. Applied to a ceramic matrix composite, it allows one to evaluate the contribution of the various damage mechanisms
on its highly nonlinear behavior. 相似文献
133.
Equality between the interval dimensions of a poset and its MacNeille completion, announced in [7], has been obtained by the authors as a byproduct of their study of Galois lattices in [8]. The purpose of this note is to give a direct proof, similar to the classical proof of Baker's result stating that the dimension (in the Dushnik-Miller sense) of a poset and its MacNeille completion are the same.Supported by French PRC Math-Info. 相似文献
134.
135.
Chemical investigation of an endophytic fungus, Pestalotiopsis theae, isolated from the leaves of Turraeanthus longipes (Meliaceae) collected in Cameroon, resulted in the isolation of six new epoxyquinols, cytosporins F–K (2–7), together with the known cytosporin D (1). The structures of the new compounds were unambiguously determined by analysis of the 1D, 2D NMR, and HRMS spectra. Cytosporins G–K (3–7) are the first cytosporins with a hydroxyl substituted C7 side chain, while cytosporins F–I (2–5) contain a 13-acetoxyl group that was not reported previously. A plausible biosynthetic pathway for the cytosporin derivatives is proposed. 相似文献
136.
137.