Wyniki wyszukiwania

1

An analysis of digital selective calling system with regard to generating false distress signals within Global Maritime Distress and Safety System

100%

Czajkowski J.

Polish Maritime Research

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2001

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tom 08

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nr 3

2

Matematicheskoe modelirovanie dvukhehlektrodnogo pervichnogo preobrazovatelja

88%

Gons'or O.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2016

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tom 18

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nr 5

3

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Derivation of the formula for the filtration coefficient by application of Poiseuille's law in membrane transport

75%

Jarzynska M., Pietruszka M.

Acta Societatis Botanicorum Poloniae

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2009

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tom 78

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nr 2

93-96

On the basis of Kedem-Katchalsky equations a mathematical analysis of volume flow (Jv) of a binary solution through a membrane (M) is presented. Two cases of transport generators have been considered: hydrostatic (Δp) as well as osmotic (Δπ) pressure difference. Based on the Poiseuille's law we derive the formula for the membrane filtration coefficient (Lp) which takes into account the membrane properties, kinetic viscosity and density of a solution flowing across the membrane. With use of this formula we have made model calculations of the filtration coefficient Lp and volume flow Jv for a polymer membrane in the case when the solutions on both sides of the membrane are mixed.

4

The rheological model of silt clay loam

75%

Oida A., Triratanasirichai K.

International Agrophysics

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1992

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tom 06

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nr 1-2

5

Measures of central tendency of aquatic habitat parametres: application to river macrophyte communities

63%

Szoszkiewicz K., Kayzer D., Staniszewski R., Dawson H. F.

Polish Journal of Ecology

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2010

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tom 58

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nr 4

The aim of this paper is to assess usefulness of different measures when determining central tendencies which characterise the environmental requirements of living organisms. Mathematical analyses were made of the environmental parameters of river macrophyte communities which were taken as a representative pattern of different levels of biological structures. To deliver a representative dataset, botanical surveys were carried out on a range of British rivers together with environmental assessment and the plant communities groups were identified based on characteristic species according to eslished phytosociological criteria. The mean values and standard univariate medians of the revealed associations were compared with means calculated on the basis of advanced transformation and also with the rarely calculated multivariate L median. Due to high variance and asymmetrical distribution, the analyses based on the mean-value appeared to be limited in application. To avoid this disadvantage transformation to obtain normality of the dataset standardisation was proposed although even this did not fully reach a satisfactory symmetry. It was concluded that each environmental variable for each single biota must be individually treated by a suile transformation to obtain approximately normal distributions. The univariate median was very resistant to the effects of outliers but gave a flattened output of the environmental dataset making the partitioning of biological units very difficult. The multivariate L median appeared to be unaffected by outliers. It enabled to obtain considerable ordering of communities against individual environmental parameters without data transformation.

6

Standardization of a vehicle's power effectiveness on the basis of a indicator of similarity of speed distribution

63%

Burski Z.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2008

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tom 08

7

Ivan Avgustovich Time - precursor of scientific approach to wood machining

51%

Wieloch G., Porankiewicz B.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2015

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tom 90

8

Optimisation of the design and operation capacities of mobile cutting and manipulation system to minimise soil disturbance and contaminant load in forests

51%

Janecek A., Dvorak J.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2002

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tom 05

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