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101.
Majorana zero modes,unconventional real-complex transition,and mobility edges in a one-dimensional non-Hermitian quasi-periodic lattice 下载免费PDF全文
A one-dimensional non-Hermitian quasiperiodic p-wave superconductor without PT-symmetry is studied.By analyzing the spectrum,we discovered that there still exists real-complex energy transition even if the inexistence of PT-symmetry breaking.By the inverse participation ratio,we constructed such a correspondence that pure real energies correspond to the extended states and complex energies correspond to the localized states,and this correspondence is precise and effective to detect the mobility edges.After investigating the topological properties,we arrived at a fact that the Majorana zero modes in this system are immune to the non-Hermiticity. 相似文献
102.
103.
The transition phase of GaAs from the zincblende (ZB)
structure to the rocksalt (RS) structure is investigated by ab initio plane-wave
pseudopotential density functional theory method, and the thermodynamic
properties of the ZB and RS structures are obtained through the
quasi-harmonic Debye model. It is found that the transition from the ZB
structure to the RS structure occurs at the pressure of about 16.3\,GPa,
this fact is well consistent with the experimental data and other theoretical results. The
dependences of the relative volume V/V0 on the pressure P, the Debye
temperature \Th and specific heat CV on the pressure P, as well as
the specific heat CV on the temperature T are also obtained
successfully. 相似文献
104.
Lai-Yu Lu Xiang-Rong Chen Guang-Fu Ji Xi-Jun Wang Jing Chang 《Molecular physics》2013,111(22):2373-2385
The structural, vibrational and thermodynamic properties of β-octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (β–HMX) crystal have been studied using the isothermal-isobaric molecular dynamics (NPT-MD) simulations. The variations of cell volume, lattice constants and molecular geometry of solid β–HMX are presented and discussed at different pressure and temperature. It was found that the N–N bond is significantly lengthened with increasing temperature, which suggests that it is relevant to the initial decomposition. An abrupt change at 27 Gpa for the volume and internal geometrical parameters was observed. This is in good accord with the experimental observation that there is a phase transition at 27 GPa, which is clearly due to conformational change, not chemical reaction. The vibrational frequencies at ambient conditions agree well with experimental results, and the pressure/temperature-induced frequency shifts of these modes are discussed. Frequency discontinuity was also observed at pressure when the phase transition occurred. The Grüneisen parameter was obtained using the vibrational frequency. 相似文献
105.
106.
107.
在全相对论理论框架下,利用多组态Dirac-Fock(MCDF)方法,系统计算了NⅡ离子2p4f—2p3d的辐射跃迁概率,得到的结果与已有实验值符合很好.具体计算中,详细分析了相对论效应、电子关联、弛豫效应、Breit相互作用和量子电动力学(QED)效应对能级精细结构及辐射跃迁概率的影响.结果表明:相对论效应、电子关联和弛豫效应对NⅡ 2p4f-2p3d辐射跃迁概率有很重要的影响,考虑了这些效应后计算值得到明显改善. 相似文献
108.
109.
Multireference calculations on low-lying states and the X~3 Π_u -~3 Π_g absorption spectra of indium dimers 下载免费PDF全文
Multireference configuration interaction calculations are carried out on 11 Λ-S low-lying electronic states of indium dimers. The states are investigated with spin-orbit pseudopotentials via the state-interacting method, and characterized by fitted spectroscopic constants based on computed potential energy curves. The vibrational structures of the double-potential well 0+g (I) ( 3 Σ g ) state are also analyzed. The experimentally observed absorption spectrum centred at ~ 13000cm-1 is simulated and assigned to X 3 Πu (v=0)-3Πg transition according to the present ab initio calculations on transition energies and dipole moment functions. 相似文献
110.
基于改进的Newman和Ziff算法以及有限尺寸标度理论, 通过对表征渗流相变特征物理量的序参量、平均集团尺寸、二阶矩、标准偏差及尺寸不均匀性的数值模拟, 分析研究了Erdös Rényi随机网络上Achlioptas爆炸渗流模型的相变性质.研究表明: 尽管序参量表现出了不连续相变的特征, 但序参量以及其他特征物理量仍具有连续相变的幂律标度行为.因此严格地说, Erdös Rényi随机网络中的爆炸渗流相变是一种奇异相变, 它既不是标准的不连续相变, 又与常规随机渗流表现出的连续相变处于不同的普适类.
关键词:
Erdös Rényi随机网络
爆炸渗流模型
相变
幂律标度行为 相似文献