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31.
B. M. Koprov S. L. Zubkovsky V. M. Koprov M. I. Fortus T. I. Makarova 《Boundary-Layer Meteorology》1998,88(3):399-423
Surface-layer convection is investigated by analyzing multi-point measurements of temperature and velocity fluctuations at different sets of spatial points.The visual analysis of temperature and velocity fluctuations measured by sensors mounted on a mast of 36-m height clearly reveals the presence of large-scale convective cells (known as ramp structures) making large contributions to the heat transfer from the ground to lower atmosphere. The vertical temperature variability is described with the aid of empirical orthogonal functions derived from temperature covariance matrices for the heights of 1, 2, 5, 10, 18 and 36 m. Temporal-spatial correlation functions obtained allow estimates of a characteristic velocity scale, which may be interpreted as the downwind velocity of ramp structures. 相似文献
32.
We present estimates of the variability of the total solar flux and its spectral components of different wavelength intervals in the region from 1 nm to 240 mm with a time-scale to 11-years. We used the data published in the monograph Solar radiation flux (by E.A.Makarova et al., 1991) as well as new available data. 相似文献
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N. V. Makarova V. I. Makarov G. A. Postolenko B. E. Akinin 《Stratigraphy and Geological Correlation》2011,19(4):450-471
Based on a generalized knowledge of conditions and mechanisms for accumulation of the cycle terrace alluvium on plain and
mountain rivers, alluvium is suggested as an instrument for stratigraphic studies, interregional correlation, and correction
of present schemes. Diachronous alluvial formations are uniformly constructed. They include two subunits, a lower “warm” and
an upper “cool” one. In addition the formations are subdivided in dynamic phases that display a dominating regime and stages
of erosion-and-accumulation cycle. Alluvial formations are characterized by a peculiar mechanical and mineralogical composition,
gradation, bedding, thickness, landscape and climatic conditions of accumulation, paleontological content, character of occurrence,
and position in a cycle incision. All these characters of an alluvial formation and its subformations correspond to a complete
climatic rhythm and oscillation stages. Alluvial formations are associated in a certain way with glacial and marine sediments
making up a single formation complex. 相似文献
35.
A program is developed for determining the history of star-forming galaxies based on the use of two- or multicolor photometry of the resolved stars in a given galaxy. We create a library of synthetic color-magnitude diagrams from theoretical stellar isochrones, taking the initial mass function, distance to the galaxy, internal and external absorption, and photometric errors into account. The resulting synthetic diagrams are combined linearly and compared quantitatively with photometric data for stars in a galaxy in order to determine star formation rates as a function of age and metallicity. This program is tested in detail under different conditions using artificial color-magnitude diagrams. Special attention is given to the limiting case when only the brightest stars of a galaxy can be seen in the color-magnitude diagram and the number of resolved stars is at most a few hundred. This limiting case corresponds to a large fraction of the nearby galaxies at distances of 3-5 Mpc observed by large ground based telescopes and the Hubble Space Telescope. 相似文献
36.
Makarova M. A. Mamedov V. I. Alekhin Yu. V. Shipilova E. S. 《Doklady Earth Sciences》2019,489(1):1297-1300
Doklady Earth Sciences - Results of the hydrogeochemical study of bauxite-bearing lateritic mantles of the Futa Djallon‒Mandingo Province, West Africa, have allowed us to characterize for the... 相似文献
37.
We present BVIc photometry of the brightest stars andcompact star clusters in NGC 2976, a dwarf galaxy in the interacting M81/M82 group. Deep CCD images of the galaxy were obtained with the 6m‐Telescope of the Special Astrophysical Observatory (Russia) at arcsec resolution. About 290 young stars and concentrated young clusters were measured. Supplementary data in the ultraviolet are taken from the literature. The extinction to the measured objects is comparatively low, E(B — V) ∼ 0.15 .. 0.20 mag. We estimate the ages of youngest resolved stars and concentrated star clusters to be ∼5 · 106 years. This population is concentrated in a broad stripe facing M81. In the central disk the population is a bit older, about 8 · 106 years, this may be a hint to an outward spreading star formation process. The metallicity of the disk population is estimatedas solar (z ∼ 0.02) from a fitting to Padova theoretical stellar isochrones. 相似文献
38.
Mamedov V. I. Shipilova E. S. Boeva N. M. Slukin A. D. Makarova M. A. Vnuchkov D. A. Bortnikov N. S. 《Doklady Earth Sciences》2020,490(1):8-12
Doklady Earth Sciences - Investigation of the comprehensive geological material on the lateritic weathering rocks (Futa Jallon-Mandingo, Africa) led to original identification of a specific horizon... 相似文献
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M. V. Makarova A. V. Rakitin D. V. Ionov A. V. Poberovskii 《Izvestiya Atmospheric and Oceanic Physics》2011,47(4):468-479
The space-time variability of the fields of CO, NO2, and O3 concentrations and contents in the troposphere of northwestern Russia is analyzed on the basis of experimental data and the results of numerical modeling. The influence that the St. Petersburg emission has on the concentrations and contents of CO, NO2, and O3 in the troposphere is estimated for March 2006. A comparison of the measurements of the total CO content and the tropospheric NO2 content with the results of modeling showed a qualitative and, in come cases, quantitative agreement between the results of calculations and experimental data. When synoptic conditions are determined, the St. Petersburg train can be detected at a distance of more than 300 km, which can affect the atmospheric air quality in adjacent countries. 相似文献