Podáváme přehled molekulárních simulací tekutin s důrazem na originální příspěvky českých pracovišť k rozvoji různých metod. Detailněji diskutujeme metody určení chemického potenciálu, reakční soubor umožňující přimý výpočet fázové rovnováhy v systémech s chemickou reakcí, simulace při konstantní entalpii, metody optimalizace simulací a molekulovou dynamiku polarizovatelných systémů. Zmiňujeme hlavní aktivity v oblasti simulací tekutin i problémy a omezení s výhledem dalšího rozvoje., Ivo Nezbeda, Jiří Kolafa, Martin Lísal., and Obsahuje seznam literatury
Later than in the wet of Europe, it was only in the course of the 12th century that the water wheel caught on in Bohemia and Moravia. At the same time hand-powered mills were still requently being used. Until the end of the 12th century most water mills as well as water courses were the property of princes, so permission to run an existing mil or to build a new one had to be granted. The location, design of and technology used in mediaeval mills in our vicinity have not been archaeologically researched. The hypotheritcal appearance of such mills and what equipment they had can be modelled based on the results of research abroad, since similar structures might also have been in use in mediaeval Bohemia and Moravia., Lucie Galusová, Martina Maříková., and Obsahuje seznam literatury
In the present paper we consider the problem of fitting parametric spatial Cox point process models. We concentrate on the moment estimation methods based on the second order characteristics of the point process in question. These methods represent a simulation-free faster-to-compute alternative to the computationally intense maximum likelihood estimation. We give an overview of the available methods, discuss their properties and applicability. Further we present results of a simulation study in which performance of these estimating methods was compared for planar point processes with different types and strength of clustering and inter-point interactions.
Conditions, under which the elements of a locally convex vector space are the moments of a regular vector-valued measure and of a Pettis integrable function, both with values in a locally convex vector space, are investigated.
Here we initiate an investigation into the class mLMn×m of monadic n × m-valued Lukasiewicz-Moisil algebras (or mLMn×m-algebras), namely n × m-valued Lukasiewicz-Moisil algebras endowed with a unary operation. These algebras constitute a generalization of monadic n-valued Lukasiewicz-Moisil algebras. In this article, the congruences on these algebras are determined and subdirectly irreducible algebras are characterized. From this last result it is proved that mLMn×m is a discriminator variety and as a consequence, the principal congruences are characterized. Furthermore, the number of congruences of finite mLMn×m-algebras is computed. In addition, a topological duality for mLMn×m-algebras is described and a characterization of mLMn×m-congruences in terms of special subsets of the associated space is shown. Moreover, the subsets which correspond to principal congruences are determined. Finally, some functional representation theorems for these algebras are given and the relationship between them is pointed out.