A new approach to geodetic networks     

Jokl  Luděk  Marek  I. 《Studia Geophysica et Geodaetica》1984,28(4):337-349

Studia Geophysica et Geodaetica - The linearized model of a geodetic network, expressed by the relationv=A h−I, does not generally satisfy the following conditions: Therefore, intermediary...  相似文献   

Shipping policy and seaport development in Poland     

Marek Potrykowski Dr.  Zbigniew Taylor Dr. 《GeoJournal》1986,12(3):281-288

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Tectonic lineaments on the cocos plate     

Marek Truchan  Roger L. Larson 《Earth and Planetary Science Letters》1973,17(2):426-432

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Quantifying volume transports during SKAGEX with the Norwegian Ecological Model system     

Morten D. Skogen  Einar Svendsen  Marek Ostrowski 《Continental Shelf Research》1997,17(15):1817-1837

A coupled 3-dimensional physical, chemical and biological model system, NORWECOM (the NORWegian ECOlogical Model system), is validated and used to identify and quantify the short-term variability of the different water masses being transported into and out of Skagerrak. The model system is a nesting between a coarse grid model set up for an extended North Sea, and a fine grid defined in the Skagerrak/Kattegat area.Originating from the extensive SKAGEX (SKAGerrak EXperiment) database, several interesting events have been identified and become the focus of the modeling. Through interactive use of the SKAGEX data set and NORWECOM, it is possible to gain a new insight into a very complex hydrodynamic system, an insight that is hard to achieve based on measurements only.  相似文献   

Retrieval of effective cloud field parameters from radiometric data     

Paulescu  Marius  Badescu  Viorel  Brabec  Marek 《Theoretical and Applied Climatology》2018,132(1-2):437-450

Theoretical and Applied Climatology - This study presents evaluation of the ability of Rossby Centre Regional Climate Model (RCA4) driven by nine global circulation models (GCMs), to skilfully...  相似文献   

The simulation of the initial mass function and star formation efficiency     

Marek Wolf  Vladimir Vanýsek 《Astrophysics and Space Science》1986,128(1):229-235

The fragmentation of a molecular cloud is modelled as a random process by the Monte Carlo method. The probability of the fragmentation is a function of the cloud initial mass and decreases rapidly for mass lower than critical mass, which is a defined parameter. The modelled IMF is compared with the mean mass function in open clusters assumed here as the observed IMF. The best fit was found for initial mass 3×10³ M _s and for the critical mass range 0.4 to 0.6M _s . It also implies the star formation efficiency to be about 0.3.Paper presented at a Workshop on The Role of Dust in Dense Regions of Interstellar Matter, held at Georgenthal, G.D.R., in March 1986.  相似文献   

Erratum to: Effectiveness of observation-domain sidereal filtering for GPS precise point positioning     

Christopher Atkins  Marek Ziebart 《GPS Solutions》2016,20(1):123-123

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The evolution of short-period binary pulsars: a systematic study     

Ene Ergma  Marek J. Sarna  & Jelena Antipova 《Monthly notices of the Royal Astronomical Society》1998,300(2):352-358

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A note on the conditions for SSD–ADAF transitions     

Marek A. Abramowicz    Igor V. Igumenshchev  & Jean-Pierre Lasota 《Monthly notices of the Royal Astronomical Society》1998,293(4):443-446

One of the necessary matching conditions between an optically thin, hot, advectively dominated part of an accretion disc (ADAF) and the standard Shakura–Sunyaev disc (SSD) part is that the matching transition region must rotate with an orbital speed that is faster than the Keplerian one. We discuss properties of the SSD–ADAF transition in terms of a simple two-dimensional hydrodynamical model.  相似文献   

Crack modelling of concrete, rock and soil with inner softening bands     

Robert Tano  Marek Klisinski 《Engineering Geology》1998,49(3-4):271-276

To model the cracking behaviour of brittle materials, different existing methods for treating the fracture zone can be used. The inner softening band (ISB) approach belongs to those methods which introduce a displacement discontinuity in which a constitutive relationship between opening displacements and tractions is assumed. This group of methods avoids difficulties in the localization zone caused by ambiguous definitions of strain measures and fracture zone widths. Whichever method is used, it is important that the proper amount of energy is dissipated. This is achieved automatically in ISB without the introduction of any extra material parameters other than the elastic constants and those describing the softening curve. Variations in mesh sizes and arrangements have shown no great influence on the total response, and the crack pattern is a part of the solution in contrast to most other methods in which it must be presumed. The concept is simple and inner softening bands have been successfully implemented within triangular three-node elements and preliminary within six-node triangular elements. The results obtained so far from various kinds of tests have shown very good performance and further development is planned.  相似文献