全文获取类型
收费全文 | 1077篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
化学 | 50篇 |
力学 | 14篇 |
综合类 | 2篇 |
数学 | 684篇 |
物理学 | 261篇 |
综合类 | 71篇 |
出版年
2024年 | 1篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2012年 | 38篇 |
2011年 | 179篇 |
2010年 | 179篇 |
2009年 | 179篇 |
2008年 | 147篇 |
2007年 | 124篇 |
2006年 | 91篇 |
2005年 | 43篇 |
2004年 | 20篇 |
2003年 | 25篇 |
2002年 | 20篇 |
2001年 | 1篇 |
2000年 | 9篇 |
1999年 | 3篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1993年 | 4篇 |
排序方式: 共有1082条查询结果,搜索用时 15 毫秒
821.
It has been known that every planar 4-graph has a 2-bend 2-D orthogonal drawing, with the only exception being the octahedron, every planar 3-graph has a 1-bend 2-D orthogonal drawing with the only exception being K4, and every outerplanar 3-graph with no triangles has a 0-bend 2-D orthogonal drawing. We show in this paper that every series-parallel 4-graph has a 1-bend 2-D orthogonal drawing. 相似文献
822.
Lizheng Lu 《Journal of Computational and Applied Mathematics》2009,231(1):412-422
We present a simple method for degree reduction of tensor product Bézier surfaces with tangent plane continuity in L2-norm. Continuity constraints at the four corners of surfaces are considered, so that the boundary curves preserve endpoints continuity of any order α. We obtain matrix representations for the control points of the degree reduced surfaces by the least-squares method. A simple optimization scheme that minimizes the perturbations of some related control points is proposed, and the surface patches after adjustment are C∞ continuous in the interior and G1 continuous at the common boundaries. We show that this scheme is applicable to surface patches defined on chessboard-like domains. 相似文献
823.
824.
Luis Verde-Star 《Journal of Mathematical Analysis and Applications》2002,274(2):755-771
The authors aim here at finding all the generalizations of the binomial formula that are given by a generating-function of the generalized Appell form for a sequence of Newton polynomials. The formulas obtained include the well-known q-analogue of the binomial formula, several formulas involving hyperbolic functions, a trigonometric analogue, and some formulas involving the geometric and the exponential series. 相似文献
825.
Chun-Gil Park 《Journal of Mathematical Analysis and Applications》2002,275(2):711-720
We prove the generalized Hyers-Ulam-Rassias stability of the linear mapping in Banach modules over a unital Banach algebra. 相似文献
826.
In this paper, we will give a decomposition theorem for some type of holomorphic mappings. This result is the generalization of many known results. 相似文献
827.
李家 《辽宁师范大学学报(自然科学版)》2004,27(2):254-256
就C语言教学中数组名的量纲、数组名与指针的关系及指针的本质等教材和讲授中容易产生理解误区的内容进行了探讨,总结了C语言中数组定义和引用语句间的内在联系,将其归纳为“升格降格法”用以对数组和指针的使用进行量纲判断. 相似文献
828.
Thermodynamic measurements on irradiated Na2[Fe(CN)5NO]⋅ 2H2O reveal the existence of four light-induced long-lived metastable states, which decay exponentially in time. The activation energies and frequency factors of the four independent states are determined from isothermal calorimetric and differential scanning calorimetric measurements. 相似文献
829.
Richard Ehrenborg 《Advances in Mathematics》2005,193(1):205-222
We present a method of lifting linear inequalities for the flag f-vector of polytopes to higher dimensions. Known inequalities that can be lifted using this technique are the non-negativity of the toric g-vector and that the simplex minimizes the cd-index. We obtain new inequalities for six-dimensional polytopes. In the last section we present the currently best known inequalities for dimensions 5 through 8. 相似文献
830.
Hideyuki Miura 《Journal of Functional Analysis》2005,218(1):110-129
We investigate a limiting uniqueness criterion to the Navier-Stokes equations. We prove that the mild solution is unique under the class , where bmo-1 is the “critical” space including Ln. As an application of uniqueness theorem, we also consider the local well-posedness of Navier-Stokes equations in bmo-1. 相似文献