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Vyhodnocování grantové soutěže pomocí otevřené expertní databáze
Grim, Jiří
2018 - Czech
Keywords:
open expert database; research funding; grants
Fulltext is available at external website.
Vyhodnocování grantové soutěže pomocí otevřené expertní databáze
Appearance Acquisition and Analysis of Effect Coatings
Filip, Jiří; Maile, F. J.
2017 - English
Keywords:
effect coatings; appearance capturing; polychromatic; particle orientation
Fulltext is available at external website.
Appearance Acquisition and Analysis of Effect Coatings
Monitoring of creep changes on heat and mechanical stressed steel samples using acoustic emission
Tichavský, Petr
2017 - Czech
The report describes the data obtained in the heat and mechanical steel specimen strain experiment to detect creep changes in the material. Zpráva popisuje data získaná pří experimentu s tepelným a mechanickým namáháním vzorku oceli za účelem detekce creepových změn v materiálu.
Keywords:
akustika
Fulltext is available at external website.
Monitoring of creep changes on heat and mechanical stressed steel samples using acoustic emission
The report describes the data obtained in the heat and mechanical steel specimen strain experiment to detect creep changes in the material.
Sledování creepových změn na tepelně a mechanicky namáhaném vzorku oceli pomocí akustické emise II
Tichavský, Petr
2017 - Czech
The report describes the data obtained in the heat and mechanical steel specimen experiment to detect creep changes in the material. The acoustic emission was simultaneously recorded from two sensors. Zpráva popisuje data získaná pří experimentu s tepelným a mechanickým namáháním vzorku oceli za účelem detekce creepových změn v materiálu. Akustická emise byla snímána současně dvěmi snímači.
Keywords:
akustická emise
Fulltext is available at external website.
Sledování creepových změn na tepelně a mechanicky namáhaném vzorku oceli pomocí akustické emise II
The report describes the data obtained in the heat and mechanical steel specimen experiment to detect creep changes in the material. The acoustic emission was simultaneously recorded from two ...
Multi-period Factor Model of a Loan Portfolio
Šmíd, Martin; Dufek, J.
2017 - English
We construct a general dynamic model of losses of a large loan portfolio, secured by collaterals. In the model, the wealth of a debtor and the price of the corresponding collateral depend each on two factors: a common one, having a general distribution, and an individual one, following an AR(1) process. The default of a loan happens if the wealth stops to be su cient for repaying the loan. We show that the mapping transforming the common factors into the probability of default (PD) and the loss given default (LGD) is one-to-one twice continuously differentiable. As the transformation is not analytically tractable, we propose a numerical technique for its computation and demonstrate its accuracy by a numerical study.\nWe show that the results given by our multi-period model may differ signi cantly from\nthose resulting from single-period models, and demonstrate that our model naturally replicates\nthe empirically observed decrease of PDs within a portfolio in time. In addition, we give a formula for the overall loss of the portfolio and, as an example of its application, we formulate a simple optimal scoring decision problem and discuss its solution.
Keywords:
Credit Risk; Structural Factor Models; Loan Portfolio Management
Fulltext is available at external website.
Multi-period Factor Model of a Loan Portfolio
We construct a general dynamic model of losses of a large loan portfolio, secured by collaterals. In the model, the wealth of a debtor and the price of the corresponding collateral depend each on two ...
Analysis of corrosion damage to steam duct through acoustic emission:\ntheoretical starting points and first results
Tichavský, Petr
2017 - Czech
The report describes the first results of the analysis of the acoustic emission data obtained by measuring the steam pipeline at the Jaslovské Bohunice Atomic Power Plant, which was made for the purpose of investigation of corrosion damage to the pipeline. Zpráva popisuje první vysledky analýzy dat akustické emise získané měřením na parovodním potrubí v Atomové elektrárně Jaslovské Bohunice pořízené za účelem zkoumání korozního poškození potrubí.
Keywords:
acoustic emission
Fulltext is available at external website.
Analysis of corrosion damage to steam duct through acoustic emission:\ntheoretical starting points and first results
The report describes the first results of the analysis of the acoustic emission data obtained by measuring the steam pipeline at the Jaslovské Bohunice Atomic Power Plant, which was made for the ...
Estimation of acoustic wave propagation velocity in a steel sample to monitor creep changes using acoustic emission
Tichavský, Petr; Slunéčko, T.; Svobodová, M.; Chmela, T.
2017 - Czech
The report describes the measurement of the sound propagation velocity in a sample of material subjected to heat and mechanical stress by means of an acoustic emission. Zpráva popisuje měření rychlosti šíření zvuku ve vzorku materiálu podrobeném tepelnému a mechanickému namáhání pomocí signálu akustické emise.
Keywords:
sound propagation
Fulltext is available at external website.
Estimation of acoustic wave propagation velocity in a steel sample to monitor creep changes using acoustic emission
The report describes the measurement of the sound propagation velocity in a sample of material subjected to heat and mechanical stress by means of an acoustic emission.
Alternative Formulation of Pay-as-clear Auction in Electricity Markets
Aussel, D.; Červinka, Michal; Henrion, R.; Pištěk, Miroslav
2017 - English
In widely used formulation of pay-as-clear electricity market the clearing price is given by the Lagrange multiplier of the demand sat- isfaction constraint in the problem of the Independent System Operator (ISO). Following this idea, one may usually calculate the market clearing\nprice analytically even for problems of higher dimensions. However, the economic interpretation of such a market setting is in question, since the minimized criterion does not correspond neither to the cost of production nor to the overall payment of consumers. This observation motivated us\nto propose an alternative clearing mechanism where the total payment of consumers is explicitly minimized. We show existence and uniqueness of the clearing price in such a setting.
Keywords:
electricity market; Lagrange multiplier; Independent System Operator
Available at various institutes of the ASCR
Alternative Formulation of Pay-as-clear Auction in Electricity Markets
In widely used formulation of pay-as-clear electricity market the clearing price is given by the Lagrange multiplier of the demand sat- isfaction constraint in the problem of the Independent System ...
An assessment of radiological consequences of accidental radioactive releases from repositories of spent nuclear fuel
Pecha, Petr
2017 - Czech
The investigation of potential accidental releases o radionuclides from spent fuel repositories is resumed. Short-term life of radionuclides are assumed to be subsided and decisive role in radiological impact assessment have lradionuclides with long half-lives. Further decrease of radioactivity is then very slow. Comparable analysis of the results acquired by HARP code developed in ÚTIA with results of European code COSYMA is presented. Zkoumána oblast postulovaných nehod ve skladech (bazénech a pak úložištích) vyhořelého paliva. Zde se předpokládá, že krátkodobé nebezpečné nuklidy se již rozpadly na zanedbatelné úrovně a počáteční inventář vyhořelého paliva klesá s časem uskladnění (řádově roky). Na významu nabývají nuklidy s dlouhým poločasem rozpadu. Uvedena srovnávací analýza výsledků kódu HARP s evropským kódem COSYMA.
Keywords:
Spent nuclear fuel; fuel repository; release source terms
Fulltext is available at external website.
An assessment of radiological consequences of accidental radioactive releases from repositories of spent nuclear fuel
The investigation of potential accidental releases o radionuclides from spent fuel repositories is resumed. Short-term life of radionuclides are assumed to be subsided and decisive role in ...
Diffusion MCMC for Mixture Estimation
Reichl, Jan; Dedecius, Kamil
2016 - English
Distributed inference of parameters of mixture models by a network of cooperating nodes (sensors) with computational and communication capabilities still represents a challenging task. In the last decade, several methods were proposed to solve this issue, predominantly formulated within the expectation-maximization framework and with the assumption of mixture components normality. The present paper adopts the Bayesian approach to inference of general (non-normal) mixtures via the Markov chain Monte Carlo simulation from the parameter posterior distribution. By collaborative tuning of node chains, the method allows reliable estimation even at nodes with significantly worse observational conditions, where the components may tend to merge due to high variances. The method runs in the diffusion networks, where the nodes communicate only with their adjacent neighbors within 1 hop distance.
Keywords:
Mixture; mixture estimation; MCMC
Fulltext is available at external website.
Diffusion MCMC for Mixture Estimation
Distributed inference of parameters of mixture models by a network of cooperating nodes (sensors) with computational and communication capabilities still represents a challenging task. In the last ...
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