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排序方式: 共有343条查询结果,搜索用时 140 毫秒
31.
A. Gadea G. de Angelis C. Fahlander M. De Poli E. Farnea Y. Li D.R. Napoli Q. Pan P. Spolaore D. Bazzacco S.M. Lenzi S. Lunardi C.M. Petrache F. Brandolini P. Pavan C. Rossi Alvarez M. Sferrazza P.G. Bizzeti A.M. Bizzeti Sona J. Nyberg M. Lipoglavsek J. Persson J. Cederkäll D. Seweryniak A. Johnson H. Grawe F. Soramel M. Ogawa A. Makishima R. Schubart S. Frauendorf 《Zeitschrift für Physik A Hadrons and Nuclei》1997,358(2):193-194
The structure of 105Sn has been investigated through the 50Cr(58Ni,2pn) reaction at a beam energy of 210 MeV. In addition to an extension of the spherical level scheme, a regular sequence of dipole transitions has been found. The experimental results are in agreement with the prediction of Tilted Axis Cranking calculations, which satisfactorily explain the properties of the band. 相似文献
32.
M. I. Gallardo S. M. Lenzi A. Vitturi 《Zeitschrift für Physik A Hadrons and Nuclei》1993,346(4):269-274
We study pairing correlations in deformed nuclei in the framework of the Nilsson+BCS theory. As in the spherical case, the pairing interaction is found to induce strong spacial correlations between the partners of each paired couple. The presence of the deformed mean field gives rise to a non-spherical pair field, whose deformation is governed by the properties of a few single-particle orbitals around the Fermi surface and does not necessarily follow the shape of the mean field. Multipole expansion of the pair field yields all the pair densities associated with the direct two-particle transfer processes to the members of the g.s. rotational band in the A+2 system. The interplay of the deformations of the mean and the pair fields can lead to different relative magnitudes and phases of these densities and therefore to different excitation patterns of the rotational bands in two-particle transfer reactions. In the case of non-collective twoquasiparticles and bands the associated pair densities display large components with high multipoles and the associated transfer processes may be favoured in heavy-ion collisions by kinematical conditions. Examples corresponding to both prolate and oblate cases are considered. 相似文献
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35.
The apparent molal volume v of sucrose in water has been measured at 25°C in the concentration range 0.04–4.4m from precise density measurements. The same property was also determined for dilute solutions of sucrose in mixed aqueous solvents containing NaCl, KCl, or urea. The limiting values
v
°
and the slopesS
v
*
were obtained in each case, and their significance has been discussed briefly. The mean apparent molal volumes v of the ternary systems were also calculated, and the predictive accuracy of Ward and Millero's modified Young's rule for v was found to be comparable to that for other electrolyte-nonelectrolyte solutions. For the system H2O-sucrose-urea, an additivity rule based simply on total molality predicted v with similar accuracy.Deceased January 15, 1976. 相似文献
36.
37.
Miljenko Perić Mirjana Mladenović Jasenka Fejzo Christel M. Marian Pablo J. Bruna 《Chemical physics letters》1982,88(6):547-552
The results of an ab initio study of the vibronic and rotational structure in the 2Π state of HNO+ are presented. It is shown that the absorption spectrum at 7200 Å observed by Herzberg could be caused by the transition from the ground to the first excited electronic state of HNO+ 相似文献
38.
We present a uniform version of Di Nola Theorem, this enables to embed all MV-algebras of a bounded cardinality in an algebra of functions with values in a single non-standard ultrapower of the real
interval [0,1]. This result also implies the existence, for any cardinal α, of a single MV-algebra in which all infinite MV-algebras of cardinality at most α embed. Recasting the above construction with iterated ultrapowers, we show how to construct such an algebra of values in a definable way, thus providing a sort of “canonical” set of values for the functional representation. 相似文献
39.
Pablo J. Bruna Gerhard Hirsch Sigrid D. Peyerimhoff Robert J. Buenker 《Molecular physics》2013,111(4):875-898
A series of calculated potential curves is reported for the low lying valence and (selected) Rydberg states of the PH molecule by employing the multi-reference (single- and) double-excitation CI method. A large AO basis including f functions on phosphorous is chosen for this study and up to twenty main configurations are used to generate a given MRD-CI space in the accompanying theoretical treatment. Very good agreement is obtained between calculation and experiment for a variety of spectroscopic constants and a number of predictions for electronically excited states of PH are made for cases in which no comparable empirical data are yet available. The repulsive 5∑- state is shown to be responsible for the predissociation of several states of the neutral system and is also thought to explain the failure to detect a number of low lying Rydberg states experimentally. Analogous calculations for the PH+ molecular ion have also been carried out and spectroscopic constants for this system are reported. In this case the 4Π state plays much the same role as the neutral 5∑- species in bringing about predissociation in its electronic spectrum. Finally a comparison is made throughout between the results for PH and PH+ and a number of isovalent systems, especially NH and NH+ and also SiH. 相似文献
40.
The origin of the broad maximum in the specific heat (c P) of glassy systems in the c P/T 3 representation, in correspondence with the boson peak, has been described from a semiclassical perspective. A new model, based in the Debye approximation, taking into account the anharmonic vibrations of correlated atoms, is proposed. The theoretical predictions are shown to be in good agreement with the experimental data obtained in several glass samples in the temperature range 2–80 K. 相似文献