935 resultados para General de Corte-S. XVII
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In this paper, a theory is developed to calculate the average strain field in the materials with randomly distributed inclusions. Many previous researches investigating the average field behaviors were based upon Mori and Tanaka's idea. Since they were restricted to studying those materials with uniform distributions of inclusions they did not need detailed statistical information of random microstructures, and could use the volume average to replace the ensemble average. To study more general materials with randomly distributed inclusions, the number density function is introduced in formulating the average field equation in this research. Both uniform and nonuniform distributions of inclusions are taken into account in detail.
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In this paper, a ground hydrologic model(GHM) is presented in which the vapor, heat and momentum exchanges between ground surface covers (including vegetation canopy) and atmosphere is described more realistically. The model is used to simulate three sets of field data and results from the numerical simulation agree with the field data well. GHM has been tested using input data generated by general circulation model (GCM) runs for both the North American regions and the Chinese regions, The results from GHM are quite different from those of GHMs in GCMs. It shows that a more active concerted effort on the land surface process study to provide a physically realistic GHM for predicting the exchange between land and atmosphere is important and necessary.
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This paper presents a general self-consistent theory of evolution and propagation of wavelets on the galactic disk. A simplified model for this theory, i. e. the thin transition-layer approximation is proposed.There are three types of solutions to the basic equation governing the evolution of wavelets on the disk: (ⅰ) normal propagating type; (ⅱ) swing type; (ⅲ) general evolving type. The results show that the first two types are applicable to a certain domain on the galactic disk and a certain region of the wave number of wavelets. The third is needed to join the other two types and to yield a coherent total picture of the wave motion. From the present theory, it can be seen that the well-known "swing theory" of the G-L sheet model holds only for a certain class of basic states of galaxies.
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Fecha: 15/23-10-1937 (>1970 reproducción) / Unidad de instalación: Carpeta 45 - Expediente 1-7 / Nº de pág.: 5 (mecanografiadas)
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Fecha: 29-12-1937 original (>1970 copia) / Unidad de instalación: Carpeta 48 - Expediente 8-9 / Nº de pág.: 3 (mecanografiadas)
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Fecha: >1970 / Unidad de instalación: Carpeta 48 - Expediente 7-2 / Nº de pág.: 2 (1 mecanografiada, 1 manuscrita)
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Fecha: 26/28-5-1939 (>1970 copia) / Unidad de instalación: Carpeta 45 - Expediente 2-5 / Nº de pág.: 7 (mecanografiadas)
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Fecha: 26/27-5-1939 / Unidad de instalación: Carpeta 45 - Expediente 2-8 / Nº de pág.: 4 (mecanografiadas)
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Leonard Carpenter Panama Canal Collection. Photographs: Dredging, Soldiers, and Ships. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida. (1 pamphlet; 15 pages)
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[ES]Este artículo tiene un doble objetivo. E1 primero, ofrecer una panorámica general sobre las contribuciones fiscales de las Provincias Vascas a la Corona durante el Antiguo Régimen,resaltando las diferencias que en ese orden existían entre las tres.El segundo,situar las demandas fiscales regias en el origen de las haciendas provinciales vascas,estableciendo los distintos ritmos que se siguieron en su conformación entre los siglos XVII y XVIII, hasta alcanzar una mayor homologación ya en 1a centuria siguiente.