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81.
82.
83.
Marija Borna Alim Ormeci Ulrich Burkhardt Raul Cardoso-Gil 《Journal of solid state chemistry》2011,184(2):296-303
Application of high-pressure high-temperature conditions (3.5 GPa at 1673 K for 5 h) to mixtures of the elements (RE:B:S=1:3:6) yielded crystalline samples of the isotypic rare earth-thioborate-sulfides RE9[BS3]2[BS4]3S3, (RE=Dy-Lu), which crystallize in space group P63 (Z=2/3) and adopt the Ce6Al3.33S14 structure type. The crystal structures were refined from X-ray powder diffraction data by applying the Rietveld method. Dy: a=9.4044(2) Å, c=5.8855(3) Å; Ho: a=9.3703(1) Å, c=5.8826(1) Å; Er: a=9.3279(12) Å, c=5.8793(8) Å; Tm: a=9.2869(3) Å, c=5.8781(3) Å; Yb: a=9.2514(5) Å, c=5.8805(6) Å; Lu: a=9.2162(3) Å, c=5.8911(3) Å. The crystal structure is characterized by the presence of two isolated complex ions [BS3]3- and [BS4]5- as well as [□(S2-)3] units. 相似文献
84.
Journal of Statistical Physics - In the simplest model of single-file diffusion, N point particles wander on a segment of the x axis of length L, with hard core interactions, which prevent passing,... 相似文献
85.
Ohne Zusammenfassung 相似文献
86.
H. Burkhardt F. Dydak J. G. H. DeGroot R. Hagelberg M. Krasny J. May H. J. Meyer P. Palazzi F. Ranjard J. Rothberg D. Schlatter J. Steinberger H. Taureg H. Wahl J. Wotschack H. Blümer H. Brummel P. Buchholz J. Duda F. Eisele B. Kampschulte K. Kleinknecht J. Knobloch E. Müller B. Pszola B. Renk K. Schmitz R. Belusević B. Falkenburg T. Flottmann R. Geiges C. Geweniger V. Hepp H. Keilwerth K. Tittel P. Debu C. Guyot S. Loucatos J. P. Merlo A. Para P. Perez F. Perrier B. Peyaud J. Rander J. P. Schuller R. Turlay B. Vallage H. Abramowicz J. Krolikowski J. H. He T. Z. Ruan W. M. Wu 《Zeitschrift fur Physik C Particles and Fields》1986,31(1):39-49
From exposures of the CDHS detector at the CERN SPS we have obtained 367μ + μ ? events in neutrino beams and 73μ + μ + events in an antineutrino beam. The magnitude of a prompt like-sign signal has been controversial in the past and moreover could not be explained by known production mechanisms. A critical discussion of the experimental situation is given. We have tried to reduce the systematic uncertainties of previous experiments and to get more information on the dependence of the signal with energy and the muon momentum cut-off. This experiment yields a signal of 2.8σ (2.4σ) of prompt like-sign dimuon events in the case of neutrinos (antineutrinos). The rate to charged current events is of the order of 10?4 forp μ<9GeV andE>100 GeV. The prompt signal has all the properties expected from the production and decay of charm-anticharm events. The magnitude, however, is substantially higher then the prediction of perturbative QCD but lower than some other experiments. 相似文献
87.
88.
Theodore W. Burkhardt 《Zeitschrift für Physik A Hadrons and Nuclei》1974,269(3):237-240
In anα-α′ phase transition of the type discussed by Wagner and Horner, the smoothly varying hydrogen distribution generates coherency stresses in the metal crystal. The system is in a metastable state, which is expected to have a long lifetime if the internal stresses are smaller than some critical stress for destroying coherency. A comparison of the calculated internal shear stress with the experimental value of the critical shear stress for the onset of plastic deformation in a Nb crystal suggests that there may well be an appreciable region in which a coherent transition is experimentally observable. 相似文献
89.
90.
Milica D. Milosavljević Dr. Ulrich Burkhardt Prof. Dr. Philip J. W. Moll Dr. Markus König Dr. Horst Borrmann Prof. Yuri Grin 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(57):14209-14216
In a joint effort utilizing modified sample preparation, microscopy, X-ray diffraction and micro-fabrication, it became possible to prepare single crystals of the “hidden” phase AlCr2. High-resolution X-ray diffraction analysis is described in detail for two crystals with the similar overall composition, but different degree of disorder, which seems to be the main cause for the differing unit cell parameters. Chemical bonding analysis of AlCr2 in comparison to prototypical MoSi2 shows pronounced differences reflecting the interchange of main group element vs. transition metal as majority component. 相似文献