全文获取类型
收费全文 | 283篇 |
免费 | 7篇 |
国内免费 | 1篇 |
专业分类
化学 | 77篇 |
晶体学 | 2篇 |
力学 | 31篇 |
数学 | 58篇 |
物理学 | 123篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 7篇 |
2018年 | 9篇 |
2017年 | 4篇 |
2016年 | 9篇 |
2015年 | 10篇 |
2014年 | 17篇 |
2013年 | 23篇 |
2012年 | 14篇 |
2011年 | 17篇 |
2010年 | 27篇 |
2009年 | 38篇 |
2008年 | 16篇 |
2007年 | 23篇 |
2006年 | 9篇 |
2005年 | 17篇 |
2004年 | 5篇 |
2003年 | 7篇 |
2002年 | 2篇 |
2000年 | 3篇 |
1995年 | 4篇 |
1992年 | 1篇 |
1987年 | 2篇 |
1982年 | 2篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1977年 | 3篇 |
1976年 | 1篇 |
排序方式: 共有291条查询结果,搜索用时 0 毫秒
151.
This paper obtains the exact 1-soliton solution of the perturbed Korteweg-de Vries equation with power law nonlinearity. The topological soliton solutions are obtained. The solitary wave ansatz is used to carry out this integration. The domain restrictions are identified in the process and the parameter constraints are also obtained. It has been proved that topological solitons exist only when the KdV equation with power law nonlinearity reduces to simply KdV equation. 相似文献
152.
Exact solutions of KdV equation with time-dependent coefficients 总被引:1,自引:0,他引:1
In this paper, we study the Korteweg-de Vries (KdV) equation having time dependent coefficients from the Lie symmetry point of view. We obtain Lie point symmetries admitted by the equation for various forms for the time-dependent coefficients. We use the symmetries to construct the group-invariant solutions for each of the cases of the arbitrary coefficients. Subsequently, the 1-soliton solution is obtained by the aid of solitary wave ansatz method. It is observed that the soliton solution will exist provided that these time-dependent coefficients are all Riemann integrable. 相似文献
153.
This paper carries out the integration of a few nonlinear wave equations to obtain topological as well as non-topological soliton solutions. The mathematical techniques used to obtain the soliton solutions are He’s variational iteration method, the tanh method and the ansatz method. The nonlinear wave equations that are studied are coupled mKdV equations, Drinfeld-Sokolov equation and its generalized version. Finally, some numerical simulations are given to support the analytical solutions. 相似文献
154.
Saima Arshed Anjan Biswas Mahmoud Abdelaty Qin Zhou Seithuti P. Moshokoa Milivoj Belic 《Chinese Journal of Physics (Taipei)》2018,56(6):2879-2886
This paper employs two integration procedures to obtain soliton solutions to the perturbed Gerdjikov–Ivanov equation. They are G′/G2–expansion method and the sine–cosine method. Bright, dark and singular solitons are revealed along with a few of the combo–soliton solutions. The existence criteria of these solitons are also given. 相似文献
155.
Anjan Biswas 《Physics letters. A》2009,373(30):2546-2548
This Letter carries out the integration of the generalized Radhakrishnan, Kundu, Lakshmanan equation to obtain the 1-soliton solution. The solitary wave ansatz is used to carry out the integration, to obtain an exact solution of this equation. 相似文献
156.
This paper obtains the 1-soliton solution of the nonlinear Schrödinger’s equation in a Kerr law media. The technique that is used to carry out the integration of this equation is the Lie symmetry analysis. 相似文献
157.
Chaudry Masood Khalique Anjan Biswas 《International Journal of Theoretical Physics》2009,48(11):3110-3113
This paper talks about the stationary solitons for Langmuir waves in plasmas that are described by the Nonlinear Schrödinger’s equation with power law nonlinearity. The integration is carried out by the usage of Lie symmetry in presence of perturbation terms. 相似文献
158.
Optical soliton perturbation in a non-Kerr law media 总被引:2,自引:0,他引:2
Russell Kohl Anjan Biswas Daniela Milovic Essaid Zerrad 《Optics & Laser Technology》2008,40(4):647-662
This paper studies the optical soliton perturbation by the aid of soliton perturbation theory. The various perturbation terms, that arise in the study of optical solitons, are exhaustively studied in this paper. The adiabatic parameter dynamics of optical solitons are obtained in presence of these perturbation terms. The types of nonlinearities that are considered are Kerr law, power law, parabolic law as well as the dual-power law. 相似文献
159.
160.
S. K. Ghosal Biplab Raychaudhuri Anjan Kumar Chowdhury Minakshi Sarker 《Foundations of Physics Letters》2004,17(5):457-477
The paper discusses a recently posed paradox in relativity concerning the speed of light as measured by an observer on board a rotating turn-table. The counter-intuitive problem put forward by F. Selleri concerns the theoretical prediction of an anisotropy in the speed of light in a reference frame comoving with the edge of a rotatiing disc even in the limit of zero acceleration. The paradox not only challenges the internal consistency of the special relativity theory but also undermines the basic tenet of the conventionality of simultaneity thesis of relativity. The present paper resolves the issue in a novel way by recasting the original paradox in the Galilean world and thereby revealing, in a subtle way, the weak points of the reasonings leading to the fallacy. As a background the standard and the non-standard synchronies in the relativistic as well as in the Galilean world are discussed. In passing, this novel approach also clarifies (contrary to often made assertions in the literature) that the so-called desynchronization of clocks cannot be regarded as the root cause of the Sagnac effect. Finally in spite of the flaw in the reasonings leading to the paradox Selleri's observation regarding the superiority of the absolute synchrony over the standard one for a rotation observer has been upheld. 相似文献