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611.
Toshihide Hikida Masashi Fukabori Takeshi Watanabe 《Journal of Molecular Spectroscopy》2005,232(2):202-212
Eleven absorption lines belonging to one of the Fermi-tetrad bands of CO2, (3, 00, 1)III centered at 6231 cm−1, have been recorded by a newly constructed near-infrared diode laser spectrometer. Precise line parameters, linestrength, and self-broadening parameters were determined from the observed spectra by analyzing the data using the Galatry profile function. 相似文献
612.
Zhang Shuna 《Advances in Applied Clifford Algebras》2005,15(2):233-238
In this paper, the concepts of Lorentz inner product with (p, q) form, the Lorentz space and the Lorentz transformation with (p, q) form are given by using Clifford algebra. It is shown that Lmp,q is the Lorentz transformation with (p, q) form, and the matrix equality relation of Minkowski space with (n − 1, 1) form is given. The examples are given to illustrate the corresponding results. 相似文献
613.
Daniel Arteaga Renaud Parentani Enric Verdaguer 《International Journal of Theoretical Physics》2004,43(3):731-747
Radiative corrections evaluated in nontrivial backgrounds lead to dispersion relations which effectively break the local Lorentz symmetry even if Lorentz invariance holds at a fundamental level. We report on progress made toward the calculation of radiative corrections which are induced by gravity. These should be relevant when approaching Planck scale. We first present the properties of the self-energy of a scalar particle traveling in a thermal graviton bath. We then discuss the possibility of performing the corresponding calculation in a curved background. We give the connection between two different approaches to the dispersion relation, based on the self-energy and the effective action, and we emphasize the need for the closed-time-path formalism in curved backgrounds. 相似文献
614.
From the modified Maxwell theory coupled to gravity, we establish a possible scenario of the violation of the Lorentz symmetry and write an effective metric for the cosmic string spacetime. Then, we investigate the arising of an analogue of the Anandan quantum phase for a relativistic Dirac neutral particle with a permanent magnetic dipole moment in the cosmic string spacetime under Lorentz symmetry breaking effects. Besides, we analyse the influence of the effects of the Lorentz symmetry violation and the topology of the defect on the Aharonov–Casher geometric quantum phase in the nonrelativistic limit. 相似文献
615.
The behaviour of a relativistic scalar particle in a possible scenario that arises from the violation of the Lorentz symmetry is investigated. The background of the Lorentz symmetry violation is defined by a tensor field that governs the Lorentz symmetry violation out of the Standard Model Extension. Thereby, we show that a Coulomb-type potential can be induced by Lorentz symmetry breaking effects and bound states solutions to the Klein–Gordon equation can be obtained. Further, we discuss the effects of this Coulomb-type potential on the confinement of the relativistic scalar particle to a linear confining potential by showing that bound states solutions to the Klein–Gordon equation can also be achieved, and obtain a quantum effect characterized by the dependence of a parameter of the linear confining potential on the quantum numbers {n,l} of the system. 相似文献
616.
617.
We study the condition for the consistency of the Gödel metric with the dynamical Chern–Simons modified gravity. It turns out to be that this compatibility can be achieved only if the cosmological constant is variable in the space. 相似文献
618.
郭愉生 《武汉大学学报(理学版)》1995,(5)
利用光速不变原理,在尽可能少的条件下,导出了特殊Lorentz变换公式,避开了在以往的特殊Lorentz变换公式的推导中所添加的那些除光速不变原理以外的种种限制,简化推导步骤,以利于扩大其应用领域. 相似文献
619.
Shaul Katzir 《Physics in Perspective (PIP)》2005,7(3):268-292
Henri Poincaré (1854–1912) developed a relativistic physics by elevating the empirical inability to detect absolute motion,
or motion relative to the ether, to the principle of relativity, and its mathematics ensured that it would be compatible with
that principle. Although Poincaré’s aim and theory were similar to those of Albert Einstein (1879–1955) in creating his special
theory of relativity, Poincaré’s relativistic physics should not be seen as an attempt to achieve Einstein’s theory but as
an independent endeavor. Poincaré was led to advance the principle of relativity as a consequence of his reflections on late
nineteenth-century electrodynamics; of his conviction that physics should be formulated as a physics of principles; of his
conventionalistic arguments on the nature of time and its measurement; and of his knowledge of the experimental failure to
detect absolute motion. The nonrelativistic theory of electrodynamics of Hendrik A.Lorentz (1853–1928) of 1904 provided the
means for Poincaré to elaborate a relativistic physics that embraced all known physical forces, including that of gravitation.
Poincaré did not assume any dynamical explanation of the Lorentz transformation, which followed from the principle of relativity,
and he did not seek to dismiss classical concepts, such as that of the ether, in his new relativistic physics.
Shaul Katzir teaches in the Graduate Program in History and Philosophy of Science, Bar Ilan University. 相似文献
620.
H. K. Urbantke 《Foundations of Physics Letters》2003,16(2):111-117
We point out, by exhibiting two examples and mentioning a third one, that it is sometimes useful to consider Lorentz transformations as generated from hyperplane or line reflections. One example concerns the construction of boosts linking two given 4-vectors, the other one concerns the Minkowski geometric understanding of V. Moretti's polar decomposition of orthochronous Lorentz matrices. 相似文献