Estimation of the third and fourth order central moments of measurement errors from sums of powers of least squares adjustment residuals     

Wiśniewski Zbigniew 《Journal of Geodesy》1996,70(5):256-262

Summary In the paper a method of determination of estimators of the central moments of the third and fourth order on the basis of the least squares adjustment is presented. These estimators concern the moments of the observation results as well as to readjustment (better) of observation sets with application of methods that take into consideration moments of higher order (not only the variance-covariance matrix).The obtained estimators are not biased, but their effectiveness was not studied. That is why the presented theory is not completed (in the sense of the estimators properties).  相似文献   

Book review     

Stuart R. Malin  S. J. Gibowicz  Bogusław Domański  Zbigniew Fajklewicz  J. A. Majorowicz  Scott King  Maciej Sadowski  Krzysztof E. Haman 《Pure and Applied Geophysics》1990,132(4):811-824

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Book reviews     

S. J. Gibowicz  Carlo Denis  Manfred Koch  Chen Yong  Michael Manga  Tapan Mukerji  Gary Mavko  W. Bielski  Maria Jeleńska  Frazer Tabeart  Lucia Lovison-Golob  Peter Ketelaar  Douglas J. Galpin  Carlo Denis  M. Ghil  C. L. Keppenne  Tracey K. Tromp  Louis François  Zbigniew Sorbjan 《Pure and Applied Geophysics》1995,145(2):363-398

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Shipping policy and seaport development in Poland     

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

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Book review     

Zbigniew Fajklewicz 《Pure and Applied Geophysics》1985,123(1):171-172

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Book reviews     

Brian J. Mitchell  Zbigniew Fajklewicz  Emile A. Okal  Leszek Czechowski  Richard Barakat  Brian Farrell  Roberto Legnani  Ennio Tosi  Stanisŀaw Michnowski 《Pure and Applied Geophysics》1985,123(6):976-994

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On similarity in the atmospheric boundary layer   总被引：2，自引：2，他引：2  

Zbigniew Sorbjan 《Boundary-Layer Meteorology》1986,34(4):377-397

A similarity theory for the atmospheric boundary layer is presented. The Monin-Obukhov similarity theory for the surface layer is a particular case of this new theory, for the case of z 0. Universal functions which are in agreement with empirical data are obtained for the stable and convective regimes.On leave from Institute of Environmental Engineering, Warsaw Technical University, 00653 Warsaw, Poland. Present address, Department of Geological and Geophysical Sciences, University of Wisconsin, Milwaukee, WI 53201 U.S.A.  相似文献   

Flow of metals into the global atmosphere     

Zbigniew Jaworowski  Maria Bysiek  Ludwika Kownacka 《Geochimica et cosmochimica acta》1981,45(11):2185-2199

Concentrations of ¹³⁷Cs, ²¹⁰Pb, ²²⁶Ra, U, V, Pb, Cd and Hg have been measured in firn and ice deposited during the past three decades in accumulation zones of glaciers and also in pre-industrial glacier ice collected in Spitsbergen, Northern Norway, Alaska, Southern Norway, Alps, Himalayas, Ruwenzori, Peruvian Andes, and at King George Island in Antarctica. Except for Hg, the geographical distribution of mean concentrations of ²²⁶Ra, U and stable heavy metals in contemporary ice is not uniform, with the lowest concentrations found in Northern Norway, Alaska and Antarctica, and the highest in continental locations at equatorial and middle latitudes. We did not find evidence of changes in rate of metal deposition during the last three decades, as compared with pre-industrial period, however, our samples of pre-industrial ice might be contaminated in part by contemporary fallout migrating from the exposed surface of old parts of glaciers into the deeper ice layers. Using the data on annual injections of ¹³⁷Cs into the global atmosphere and mean global concentrations of radionuclides and heavy metals found in contemporary ice the global annual flows of ²²⁶Ra, ²¹⁰Pb, U,V, Pb, Cd and Hg were estimated as 6.6 kCi, 485 kCi, 12kt, 4870kt, 590 kt, 180 kt and 190 kt, respectively. These estimates are 1–2 orders of magnitude higher than estimates based on primary paniculate emissions. The anthropogenic contribution is a small fraction of the flows, which are dominated by natural processes leading to enrichment of metals in airborne dust.  相似文献   

Structural integrity of cracks in the head of Washington on Mount Rushmore     

Zbigniew Hladysz 《Geotechnical and Geological Engineering》1989,7(4):315-322

Summary Preliminary studies of the stability of Mt Rushmore shows a tendency for permanent crack deformation resulting from seasonal opening and closing of cracks in the structure.  相似文献   

Petroleum exploration models—Estimation and applications     

Zbigniew ?ucki  Zbigniew Szkutnik 《Mathematical Geology》1989,21(5):495-512

Three statistical models of oil and gas exploration prevail in the literature: field size distribution, exploration function, and effectiveness of exploration models. They may have many functional forms and may be used for prediction and planning results of future exploration activity. A review of American and Soviet literature of exploration models is presented with special emphasis on functions suitable for countries which, like Poland, are not rich in oil and gas. Two new procedures are proposed: a method for assessing field size distribution and a method for simultaneous interval estimation of parameters of the exploration function. The methods complement existing ones as they are suited to areas that are not rich in hydrocarbons. Examples of application to exploration of two Polish petroliferous basins are given.  相似文献