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91.
92.
P. G. Varmette D. T. Shidot W. C. Ma A. V. Ramayya R. V. F. Janssens C. N. Davids J. H. Hamilton I. Ahmad H. Amro B. R. S. Babu B. Back K. S. Bindra D. J. Blumenthal L. T. Brown M. P. Carpenter W. L. Croft B. Crowell S. M. Fischer U. Garg R. G. Henry T. Ishii T. L. Khoo J. Kormicki T. Lauritsen C. J. Lister D. Nisius H. Penttila R. B. Piercey J. A. Winger S. J. Zhu andP. B. Semmes 《Physics letters. [Part B]》1997,410(2-4):103-109
In-beam γ-ray transitions in 181Hg, the lightest odd-A Hg isotope known thus far, have been identified from fragment mass-γ and γ-γ coincidence measurements. Five prolate deformed rotational bands were placed in the level scheme. A decoupled band built on the strongly prolate deformed 1/2−[521] ground state was observed up to 29/2−. A 5/2−[512] configuration is suggested for a pair of strongly coupled bands displaying no signature splitting. The other two bands are also signature partner bands. They are populated with the largest intensity and exhibit splitting. They have been associated with the mixed neutron i13/2 orbitals and are proposed to decay to an i13/2 isomeric state associated with an oblate state. 相似文献
93.
Richard K. Haynes Burkhard Fugmann Jrg Stetter Karl Rieckmann Hans‐Dietrich Heilmann Ho‐Wai Chan Man‐Ki Cheung Wai‐Lun Lam Ho‐Ning Wong Simon L. Croft Livia Vivas Lauren Rattray Lindsay Stewart Wallace Peters Brian L. Robinson Michael D. Edstein Barbara Kotecka Dennis E. Kyle Bernhard Beckermann Michael Gerisch Martin Radtke Gabriele Schmuck Wolfram Steinke Ute Wollborn Karl Schmeer Axel Rmer 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2006,118(13):2136-2142
94.
MR Eskildsen AB Abrahamsen PL Gammel DJ Bishop NH Andersen K Mortensen PC Canfield 《Pramana》2002,58(5-6):903-905
We compare the results of small angle neutron scattering on the flux line lattice (FLL) obtained in the borocarbide superconductor
LuNi2B2C with the applied field along the c- and a-axes. For H‖c the temperature dependence of the FLL structural phase transition from square to hexagonal symmetry was investigated. Above
10 K the transition onset field. H
2(T), rises sharply, bending away from H
c2(T) in contradiction to theoretical predictions of the two merging. For H‖a a first order FLL reorientation transition is observed at H
tr=3–3.5 kOe. Below H
tr the FLL nearest neighbor direction is parallel to the b-axis, and above H
tr to the c-axis. This transition cannot be explained using nonlocal corrections to the London model. 相似文献
95.
96.
The structure of the chlorine atom-benzene complex has been a topic of significant controversy for more than 50 years. We have reexamined the structure of this complex with new density functional methods especially designed for non-covalent complexes, and compared the structures and energetics to those obtained using standard DFT and high accuracy composite methods. We find that the popular B3LYP functional fails to identify stationary points revealed by other functionals, and that the eta(1)-sigma complex appears to be more stable than the eta(1)-pi complex, contrary to other recent work, highlighting the careful selection of methods required in non-covalent radical systems. 相似文献
97.
Dr. Man‐Rong Li Maria Retuerto Dr. David Walker Tapati Sarkar Dr. Peter W. Stephens Dr. Swarnakamal Mukherjee Tanusri Saha Dasgupta Dr. Jason P. Hodges Dr. Mark Croft Dr. Christoph P. Grams Joachim Hemberger Dr. Javier Sánchez‐Benítez Ashfia Huq Dr. Felix O. Saouma Joon I. Jang Martha Greenblatt 《Angewandte Chemie (International ed. in English)》2014,53(40):10774-10778
Above‐room‐temperature polar magnets are of interest due to their practical applications in spintronics. Here we present a strategy to design high‐temperature polar magnetic oxides in the corundum‐derived A2BB′O6 family, exemplified by the non‐centrosymmetric (R3) Ni3TeO6‐type Mn2+2Fe3+Mo5+O6, which shows strong ferrimagnetic ordering with TC=337 K and demonstrates structural polarization without any ions with (n?1)d10ns0, d0, or stereoactive lone‐pair electrons. Density functional theory calculations confirm the experimental results and suggest that the energy of the magnetically ordered structure, based on the Ni3TeO6 prototype, is significantly lower than that of any related structure, and accounts for the spontaneous polarization (68 μC cm?2) and non‐centrosymmetry confirmed directly by second harmonic generation. These results motivate new directions in the search for practical magnetoelectric/multiferroic materials. 相似文献
98.
Andrey E. Sheshenev Anna K. Croft Alexandre S. Shashkov Ivan G. Bolesov 《Tetrahedron letters》2006,47(16):2839-2843
1-Trimethylsilyl-3-phenylcyclopropene undergoes a highly stereocontrolled ene-reaction to give a dimer and further reaction leads to one or more trimers derived through two ene-reactions. 相似文献
99.
100.
CFD modelling of ‘real‐life’ thermo‐fluid processes often requires solutions in complex three‐dimensional geometries, which can result in meshes containing aspects that are badly distorted. Cell‐centred finite volume methods (CC‐FV), typical of most commercial CFD tools, are computationally efficient, but can lead to convergence problems on meshes that feature cells with highly non‐orthogonal shapes. The control volume‐finite element method (CVFE) uses a vertex‐based approach and handles distorted meshes with relative ease, but is computationally expensive. A combined vertex‐based—cell‐centre technique (CFVM), detailed in this paper, allows solutions on distorted meshes where purely cell‐centred solutions procedures fail. The method utilizes the ability of the vertex‐based approach to resolve the flow field on a distorted mesh, enabling well established cell‐centred physical models to be employed in the solution of other transported quantities. The vertex‐based flow code is verified against a manufactured 3D solution and error norms are compared on meshes with various degrees of distortion. The CFVM method is validated with benchmark solutions for thermally driven flow and turbulent flow. Finally, the method is illustrated on three‐dimensional turbulent flow over an aircraft wing on a distorted mesh where purely cell‐centred techniques fail. The CFVM is relatively straightforward to embed within generic CC based CFD tools allowing it to be employed in a wide variety of processing applications. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献