Search results for "Equations"
showing 10 items of 955 documents
Diferenciālvienādojumi un variāciju rēķini, 1. daļa
1937
Diferenciālvienādojumi un variāciju rēķini, 2. daļa
1938
Variāciju rēķinu direktās metodes: maģistra darbs
1942
Математика: Дифференциальные уравнения
1994
Rakstu krājums satur zinātniskos rakstus, kuri veltīti parasto diferenciālvienādojumu teorijai. Pētīti jautājumi par diferenciālvienādojumu atrisinājumu eksistenci, atrisinājumu kopas struktūru un atrisinājumu īpašībām. Daži raksti veltīti konkrēto praktisko problēmu pētījumu metožu (tai skaitā skaitlisko) izstrādei.
Математика: Дифференциальные уравнения
1992
Сборник содержит 13 статей, большая часть работ посвящена разработке общей теории нелинейных краевых задач обыкновенных дифференциальных уравнений. В ряде статей решаются конкретные актуальные задачи, строятся разностные схемы решения задач в частных производных, рассматриваются операторные уравнения и уравнения с различными особенностями.
Математика: Дифференциальные уравнения
1990
Сборник содержит 16 статей, большинство статей посвящено изучению различных актуальных теоретических и прикладных вопросов нелинейных краевых задач обыкновенных дифференциальных уравнений. В ряде статей рассматриваются уравнения с частными производными, уравнения с запаздыванием, а также строятся разностные схемы решения начальных и краевых задач.
Mathematical modelling and experimental study of straw co-firing with gas
2019
The main goal of the present study is to promote a more effective use of agriculture residues (straw) as an alternative renewable fuel for cleaner energy production with reduced greenhouse gas emissions. With the aim to improve the main combustion characteristics at thermo-chemical conversion of wheat straw, complex experimental study and mathematical modelling of the processes developing when co-firing wheat straw pellets with a gaseous fuel were carried out. The effect of co-firing on the main gasification and combustion characteristics was studied experimentally by varying the propane supply and additional heat input into the pilot device, along with the estimation of the effect of co-firing on…
Optical non-contact electric field mapping by LIF in Cs vapor
2007
We present experimental and theoretical studies of the possibility of using cesium vapor as a tracer gas for optical non-contact electric field mapping. Optical images of electric field distributions have been obtained.
A physical description of fractional-order Fourier diffusion
2014
In this paper the authors introduce a physical picture of anomalous heat transfer in rigid conductor. The analysis shows that a fractional-order Fourier transport is obtained by the analysis of the heat transport in a functionally graded conductor. The order of the fractional-type operator obtained is related to the grading of the physical properties of the conductor.
Modelling of Pe C alloys solidification using the artificial heat source method
1997
Abstract In the paper the numerical solutions concerning the cast iron and also the carbon steel solidification are presented. In order to take into account the non-linearities appearing in differential equations describing the boundary-initial problem considered — a certain algorithm called the artificial heat source method has been used. The examples illustrating the possibilities of proposed method applications have been solved by means of the boundary element method, but the others numerical methods can be also utilized.