全文获取类型
收费全文 | 1049篇 |
免费 | 126篇 |
国内免费 | 82篇 |
专业分类
化学 | 464篇 |
晶体学 | 9篇 |
力学 | 11篇 |
综合类 | 3篇 |
数学 | 286篇 |
物理学 | 484篇 |
出版年
2024年 | 1篇 |
2023年 | 68篇 |
2022年 | 20篇 |
2021年 | 32篇 |
2020年 | 50篇 |
2019年 | 34篇 |
2018年 | 35篇 |
2017年 | 55篇 |
2016年 | 34篇 |
2015年 | 53篇 |
2014年 | 90篇 |
2013年 | 88篇 |
2012年 | 85篇 |
2011年 | 56篇 |
2010年 | 76篇 |
2009年 | 99篇 |
2008年 | 74篇 |
2007年 | 75篇 |
2006年 | 77篇 |
2005年 | 36篇 |
2004年 | 17篇 |
2003年 | 12篇 |
2002年 | 16篇 |
2001年 | 18篇 |
2000年 | 8篇 |
1999年 | 32篇 |
1998年 | 12篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1959年 | 1篇 |
排序方式: 共有1257条查询结果,搜索用时 234 毫秒
91.
92.
The exact metric of a Schwarzschild black hole in the true radiation gauge was recently reported.In this work, we base on this gravity and calculate the gravitational deflection of relativistic massive particles up to the fourth post-Minkowskian order. It is found that the result is consistent with the previous formulations for both the case of dropping the fourth-order contribution and the case of light deflection. Our result might be helpful for future high-accuracy observations. 相似文献
93.
LIU Jing-Jing LUO Zhi-Quan 《理论物理通讯》2008,49(1):239-242
The electron capture of Gamow--Teller transition on iron group nuclei is investigated in a strong magnetic. field at the crusts of neutron stars. The results show that the magnetic field has only a slight effect on the electron capture rates with the range of the magnetic fields (10^9 - 10^13 G) on surfaces of most neutron stars, whereas for some magnetars whose range of the magnetic field is 10^13 - 10^18 G, the electron capture rates of most iron group nuclei would be debased greatly and may be even decreased overrun 3 orders of magnitude by the strong magnetic field. 相似文献
94.
Hawking Radiation from Topological Kerr Anti-de-Sitter Black Hole with One Rotational Parameter via Covariant Anomalies 总被引:3,自引:0,他引:3 下载免费PDF全文
Using anomalous viewpoint, we study the Hawking radiation from a kind of topological Kerr Anti-de-Sitter (Kerr-AdS) black hole with one rotational parameter. We employ the covariant gauge and gravitational anomalies. The result supports the Robinson-Wilczek opinion and shows that the Hawking temperature can be correctly determined by cancelling covariant gauge and gravitational anomalies at the horizon. 相似文献
95.
A Kind of Exact Inflationary Solution in the Chaotic Inflation Model to Non-minimally Coupled Scalar Field 下载免费PDF全文
We present a kind of exact inflationary solution in the chaotic inflation scenario to non-minimal coupled scalar field, taking the Hubble parameter directly as a function of the scalar field φ, H(φ) = αφ^n. Using the analysis of the WMAP3 data, we give the range of power index n. 相似文献
96.
Yi-Wen Han Xiao-Xiong Zeng Shu-Zheng Yang 《International Journal of Theoretical Physics》2008,47(7):2011-2020
The recent work of Robinson and Wilczek that Hawking radiation can be determined by the compensating fluxes is extended to the charged and magnetized Reissner-Nordström de Sitter black hole. We reconstruct the electromagnetic field tensor and the Lagrangian of the field corresponding to the source with electric and magnetic charges to redefine an equivalent charge and gauge potential. We construct the effect field theory between the event horizon and cosmological horizon to respectively determine the compensating fluxes from them, which are shown to exactly equal to those of Hawking radiation, by the covariant anomaly cancellation conditions. 相似文献
97.
Based on the anomaly cancellation method, initiated by Robinson and Wilczek, we investigate Hawking radiation from the event horizon and cosmological horizon of the higher dimensional Reissner–Nordström–de Sitter black hole via covariant gauge and gravitational anomalies. Unlike in black hole space-time, to describe the observable physics, the effective field theory here is constructed between the event horizon and cosmological horizon. Our result shows that to restore the underlying gauge covariance and diffeomorphism covariance at the quantum level, the covariant compensating fluxes of gauge and energy–momentum tensor, which are shown to equal to those of Hawking radiation, should be radiated from the event horizon and absorbed from the cosmological horizon, respectively. 相似文献
98.
在本文中,我们引入了非精确均值投影算法来求解多重集非凸分裂可行问题,其中这些非凸集合为半代数邻近正则集合.通过借助著名的Kurdyka-Lojasiewicz不等式理论,我们建立了算法的收敛性. 相似文献
99.
JIANG Qing-Quan 《理论物理通讯》2012,58(2):237-243
The Banerjee-Majhi's recent work shows that the Hawking radiation and entropy/area quantum of the black hole horizon (EH) can be well described in the tunneling picture. In this paper, we develop this idea to the case of a de Sitter tunneling from the cosmological horizon (CH), and obtain the Hawking emission spectrum and entropy/area spectroscopy from the CH of the purely de Sitter black hole as well as the Schwarzschild-de Sitter black hole. It is interestingly found that the area of the CH is quantized by Δ A=4lpl2, as was given by Hod for the area quantum of -the EH by considering the Heisenberg uncertainty principle and Schwinger-type emission process. Also, we conclude from our derivation that the entropy/area quantum of the CH is universal in the sense that it is independent of the black hole parameters. This realization implies that, (at least) at a semiclassical level, the de Sitter gravity shares the similar quantum behavior as the usual gravity without presence of a cosmological constant. 相似文献
100.
Applying Parikh's quantum tunneling model, we study the quantum tunneling radiation of Reissner-Nordström de Sitter black hole with a global monopole. The result shows that the tunneling rates at the event
horizon and the cosmic horizon are related to Bekenstein-Hawking entropy
if we take the energy conservation into consideration, and the true radiate
spectrum is not precisely thermal. 相似文献