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An attempt at mathematical modelling of the process of microbiological biodegradation of diesel oil

Hawrot-Paw M., Nowak A.

Environment Protection Engineering

2012

Vol. 38, nr 3

23--29

A mathematical model has been created describing the process of biodegradation of diesel oil. Data for model development were obtained from two previously conducted laboratory experiments. The correlation between the measured and calculated of the biodegradation of diesel fuel data indicates the existing connection between them. It was found that the proposed mathematical approach of the biological process showed similar direction and nature of changes occurring in these two data sets.

A theoretical approach to the solutions of surface irregularities parameters

Haghi A. K.

International Journal of Applied Mechanics and Engineering

2005

Vol. 10, no 2

359-364

In this paper, the probability characteristics of surface irregularities parameters described by the composition of the deterministic component and the homogeneous random normal field were analysed. Formulae for the calculation of the mathematical expectation of the Ras parameter and the evaluation of its variance are given.