全文获取类型
收费全文 | 1368篇 |
国内免费 | 76篇 |
完全免费 | 312篇 |
专业分类
数学 | 1756篇 |
出版年
2022年 | 1篇 |
2021年 | 7篇 |
2020年 | 10篇 |
2019年 | 14篇 |
2018年 | 68篇 |
2017年 | 87篇 |
2016年 | 69篇 |
2015年 | 95篇 |
2014年 | 145篇 |
2013年 | 169篇 |
2012年 | 166篇 |
2011年 | 159篇 |
2010年 | 130篇 |
2009年 | 134篇 |
2008年 | 91篇 |
2007年 | 85篇 |
2006年 | 72篇 |
2005年 | 22篇 |
2004年 | 26篇 |
2003年 | 19篇 |
2002年 | 22篇 |
2001年 | 20篇 |
2000年 | 15篇 |
1999年 | 19篇 |
1998年 | 20篇 |
1997年 | 10篇 |
1996年 | 16篇 |
1995年 | 11篇 |
1994年 | 18篇 |
1993年 | 17篇 |
1992年 | 9篇 |
1991年 | 4篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
排序方式: 共有1756条查询结果,搜索用时 31 毫秒
1.
混合序列强大数定律的收敛速度 总被引:9,自引:0,他引:9
混合序列强大数定律的收敛速度薛留根(河南许昌师范高等专科学校数学系,许昌461000)河南省自然科学基金资助项目.1990年12月3日收到,1991年11月11日收到第一次修改稿.一、引言和引理关于独立同分布的随机变量序列{Xn}的强大数定律的收敛速... 相似文献
2.
单位阶跃函数在广义Fourier变换中的屏蔽效应 总被引:9,自引:0,他引:9
对u(t)在广义傅氏变换的作用进行了探讨,并给出了半屏、翻掩、隐匿、零点对应和对称等相关定理. 相似文献
3.
New classes of domains with explicit Bergman kernel 总被引:9,自引:1,他引:8
Roos GUY 《中国科学A辑(英文版)》2004,47(3):352-371
We introduce two classes of egg type domains, built on general bounded sym-metric domains, for which we obtain the Bergman kernel in explicit formulas. As an aux-iliary tool, we compute the integral of complex powers of the generic norm on a boundedsymmetric domains using the well-known integral of Selberg. This generalizes matrix in-tegrals of Hua and leads to a special polynomial with integer or half-integer coefficientsattached to each irreducible bounded symmetric domain. 相似文献
4.
Xin-yu Song Lan-sun ChenDepartment of Mathematics. Xinyang Teachers College Henan ChinaInstitute of Mathematics Academy of Mathematics System Sciences Chinese Academy of Sciences Beijing China 《应用数学学报(英文版)》2002,18(3):423-430
The dynamics of a predator-prey system, where prey population has two stages, an immature stage and a mature stage with harvesting, the growth of predator population is of Lotka-Volterra nature, are modelled by a system of retarded functional differential equations. We obtain conditions for global asymptotic stability of three nonnegative equilibria and a threshold of harvesting for the mature prey population. The effect of delay on the population at positive equilibrium and the optimal harvesting of the mature prey population are also considered. 相似文献
5.
Based on the interval analysis, an interval slope method is proposed for finding all global minimizers of a several peaks function f on domain X^0包含于R^n, which is given by interval slope discard tests and interval extension of objective function.Numerical results of representative test functions show that this method is practical and effective. 相似文献
6.
8.
Applications of F-expansion to periodic wave solutions for a new Hamiltonian amplitude equation 总被引:7,自引:0,他引:7
We present an extended F-expansion method for finding periodic wave solutions of nonlinear evolution equations in mathematical physics, which can be thought of as a concentration of extended Jacobi elliptic function expansion method proposed more recently. By using the F-expansion, without calculating Jacobi elliptic functions, we obtain simultaneously many periodic wave solutions expressed by various Jacobi elliptic functions for the new Hamiltonian amplitude equation introduced by Wadati et al. When the modulus m approaches to 1 and 0, then the hyperbolic function solutions (including the solitary wave solutions) and trigonometric function solutions are also given respectively. As the parameter ε goes to zero, the new Hamiltonian amplitude equation becomes the well-known nonlinear Schrödinger equation (NLS), and at least there are 37 kinds of solutions of NLS can be derived from the solutions of the new Hamiltonian amplitude equation. 相似文献
9.
On the apostol-bernoulli polynomials 总被引:7,自引:0,他引:7
Qiu-Ming Luo 《Central European Journal of Mathematics》2004,2(4):509-515
In the present paper, we obtain two new formulas of the Apostol-Bernoulli polynomials (see On the Lerch Zeta function. Pacific J. Math., 1 (1951), 161–167.), using the Gaussian hypergeometric functions and Hurwitz Zeta functions respectively, and give certain special cases and
applications. 相似文献
10.
Every Planar Graph with Maximum Degree 7 Is of Class 1 总被引:6,自引:0,他引:6
Limin Zhang 《Graphs and Combinatorics》2000,16(4):467-495
V.G. Vizing conjectured in 1968 that every planar graph with maximum degree 6 or 7 is of class 1. This paper shows that, for
planar graphs with maximum degree 7, Vizing's conjecture is true.
Revised: November 24, 1999 相似文献