1,751 research outputs found

    Evidence theory and VPRS model

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    The Rough Set Theory (RST) was proposed by Pawlak [4] as a new mathematical approach to deal with uncertain knowledge in expert systems. In 1991 Ziarko [11] proposed the Variable Precision Rough Set Model (VPRSM) as a certain extension of the rough set theory. VPRSM approach makes it possible to use a certain level of misclassi cation. The aim of this paper is to introduce belief and plausibility functions de ned by the {approximation regions. On the basis of the {approximation regions, the {basic probability assignment is de ned and the Dempster's combination rule for product of two decision tables is constructed. This entire approach is illustrated by examples

    Valerie Weaver: Overcoming cancer's stiff resistance

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    Weaver investigates the mechanical properties of tumors and how changes in the tumor microenvironment influence cancer cell behavior

    Automatic measuring with LabVIEW

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    Práce bude seznamovat s programem LabVIEW, měřením stejnosměrného motoru s cizím buzením, návrhem automatizovaného měřicího pracoviště a popisem řídícího software. V prvním bodě bude popsána virtuální laboratoř. Druhá kapitola bude popisovat program LabVIEW, jednotlivá okna programu a tvorbu virtuálního přístroje. Třetí část se bude zabývat měřením charakteristik stejnosměrného motoru s cizím buzením, kde bude popsáno použití a spouštění motorů, zkouška naprázdno a zatěžovací zkouška. Ve čtvrté kapitole bude návrh automatizovaného měřicího pracoviště a popis přístrojů, které jej tvoří včetně jednotlivých vlastností a parametrů. Pátý bod bude seznamovat s funkcí řídícího software, popisovat nejen blokové diagramy, ale i čelní panely virtuálního přístroje pro bloky nastavovací, měřicí, ukládací a kontrolující. Šestá kapitola bude zobrazovat tabulku a průběhy vzniklé měřením stejnosměrného motoru s cizím buzením. Nakonec se provede zhodnocení jejich hodnot a průběhů.The thesis will introduce a program Labview, a measurement of DC motor separately excited, a design of an automated workplace and a description of its control software. The first section will describe a virtual laboratory. The second chapter will describe the LabVIEW program, each program window and a creation of a virtual instrument. The third part will deal with measurings of characteristics of the DC motor separately excited where the usage and function of motors, load test and a load test will be described. The fourth chapter will introduce the design of the automated measuring workplace and its machine descriptions including their individual characteristics and parameters. The fifth section will deal with functions of the control software describing not only block diagrams but also front panels of the virtual instrument for setting, measuring, storing and controlling blocks. The sixth chapter will depict a chart and waveforms created by the measurement of the DC motor separately excited. Finally, an evaluation of their values and waveforms will be performed.

    The Role Of Enculturation In Student Writing-Related Beliefs, Values, And The Potential For Transfer

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    This qualitative research project examines the relationship between students’ perception of their disciplinary identities, epistemologies, and writing and learning to write in an Intermediate Composition course. More specifically, this study investigates the impact of these “enculturative influences” on students’ perception of the writing classroom, uptake of writing studies skills and strategies, and eventual transfer of these skills and strategies to future writing contexts

    Growing Down

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    Development of the Strength of the Fluidized Bed Combustion Fly Ash Based Geopolymer in Time

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    ThispaperpresentsastudyintothemechanicalbehaviourofFluidizedBedCombustion (FBC)fly ash-based geopolymer.FBCflyashisaby-product of a burning of a solid fuel (hard coal in case of this study) in a furnace at a low temperature. FBC fly ash is a type of a waste which is more difficult to recycle than pulverized fly ash.UsingFBCflyashin geopolymers offers one possible way to recycle it. The main goals of the investigation were to determine the influence of curing temperature and curing conditions on the strength of FBC fly ash-based geopolymer; to determine the changes of strength over time and the changes of the temperature inside the geopolymer during the curing process. Tests have shown that the strength of the geopolymer generally increases in line with the increase of a curing temperature. The compressive strength stabilizes after 5 days of curing and yet continues to gain extra strength over the longer term. Theflexuralbehaviourisnotmonotonicandthereforehardtopredict.The temperature inside the geopolymer rises rapidly until reaching around 27.5°C and then decreases steadily. Keywords: geopolymer, Fluidized Bed Combustion Fly ash, temperature, strengt

    A family tree of Markov models in systems biology

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    Motivated by applications in systems biology, we seek a probabilistic framework based on Markov processes to represent intracellular processes. We review the formal relationships between different stochastic models referred to in the systems biology literature. As part of this review, we present a novel derivation of the differential Chapman-Kolmogorov equation for a general multidimensional Markov process made up of both continuous and jump processes. We start with the definition of a time-derivative for a probability density but place no restrictions on the probability distribution, in particular, we do not assume it to be confined to a region that has a surface (on which the probability is zero). In our derivation, the master equation gives the jump part of the Markov process while the Fokker-Planck equation gives the continuous part. We thereby sketch a {}``family tree'' for stochastic models in systems biology, providing explicit derivations of their formal relationship and clarifying assumptions involved.Comment: 18 pages, 2 figure

    Regeneration of vegetation in manor park in Laskowice (Dąbrowa Forest District)

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    Laskowice is a village located in Kujawsko-Pomorskie Voivodeship, in Świecie Upland near Świecie. On the edges of the village there is a manor-palace complex established by Franz von Gordon in the first half of the 19th century. Since the palace was destroyed in 1945, the maintenance of the park was ceased. Currently the object is administrated by Dąbrowa Forest District. The aim of the study was to determine the direction of vegetation transformation of the park in the light of lack of use. Lack of human interference within examined object has initiated regeneration processes. At present the vegetation of the park refers to structure and species composition of natural forest plant communities. Phytosociological research carried out in 2015 and 2016 revealed the presence of following associations: Ficario-Ulmetum , Fraxino-Alnetum and Tilio-Carpinetum. Shrub vegetation of Rhamno-Prunetea class develops in places. Non-forest vegetation of meadows ( Arrhenatheretum elatioris ) and nitrophilous edges ( Urtico-Aegopodietum ) are present. In case of analyzed object the physionomy and species composition of forest communities differs from typical forms. An attention is paid to a strongly developed layer of brushwood. There is a lack of some characteristic species, alien species are present in treestand and shrub layers. A large share in phytocoenoses of Ficario-Ulmetum and Tilio-Carpinetum has Sambucus nigra and in case of the first association also alien species – Philadelphus coronarius and Symphoricarpos albus . Values of calculated indices of synanthropization confirm the regeneration of forest communities: index of natural character achieves value 40% and synanthropization index ranges from 48.78% for Tilio-Carpinetum to 60.00% for Fraxino-Alnetum

    Simultaneous Reconstruction of Duplication Episodes and Gene-Species Mappings

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    We present a novel problem, called MetaEC, which aims to infer gene-species assignments in a collection of gene trees with missing labels by minimizing the size of duplication episode clustering (EC). This problem is particularly relevant in metagenomics, where incomplete data often poses a challenge in the accurate reconstruction of gene histories. To solve MetaEC, we propose a polynomial time dynamic programming (DP) formulation that verifies the existence of a set of duplication episodes from a predefined set of episode candidates. We then demonstrate how to use DP to design an algorithm that solves MetaEC. Although the algorithm is exponential in the worst case, we introduce a heuristic modification of the algorithm that provides a solution with the knowledge that it is exact. To evaluate our method, we perform two computational experiments on simulated and empirical data containing whole genome duplication events, showing that our algorithm is able to accurately infer the corresponding events
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