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81.
Sfirloaga Paula Vlase Gabriela Vlase Titus Malaescu Iosif Marin Catalin Nicolae Vlazan Paulina 《Journal of Thermal Analysis and Calorimetry》2020,141(5):1817-1827
Journal of Thermal Analysis and Calorimetry - Porous media are very useful tools used for energy management. They are used in vast fields such as in solar heat exchangers to enhance heat transfer... 相似文献
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Positivity - The main result of the note describes certain optimal-score partitions. This result is based on the fact that any nonnegative square matrix whose column sums are the same as the... 相似文献
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C. B. Collins F. Davanloo M. C. Iosif R. Dussart J. M. Hicks S. A. Karamian C. A. Ur I. I. Popescu V. I. Kirischuk J. M. Pouvesle P. McDaniel C. E. Crist 《Physics of Atomic Nuclei》2000,63(12):2067-2072
A sample containing 6.3×1014 nuclei of the 16+ isomer of 178Hf having a half-life of 31 yr and an excitation energy of 2.446 MeV was irradiated with x-ray pulses from a device operated at 15 mA to produce bremsstrahlung with an endpoint energy of 90 keV. The gamma spectra of the isomeric target were taken with a Ge detector. The intensity of the 325.5-keV (6+ → 4+) transition in the ground-state band of 178Hf was found to increase by about 2%. Such an enhanced decay of the 178Hf isomer is consistent with an integrated cross section value of 3×10?23 cm2 keV if resonance absorption occurs within energy ranges corresponding to the maxima of the x-ray flux, either near 20 keV or at the energies of the characteristic emission lines of W. 相似文献
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Simultaneous normalized differential reflectance spectroscopy (DeltaR/R) and second harmonic generation (SHG) has been employed to follow, independently, OH and adsorbed CO (CO(ads)) on a single Pt(111) microfacet in CO-saturated aqueous perchloric acidic solutions during voltammetric cycles, leading to the oxidation of CO(ads) and subsequent readsorption of CO on the surface. The results obtained are consistent with the disruption of the radical19 x radical19R19.1 degrees phase just prior to the oxidation of adsorbed CO. 相似文献
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