Ionization detector for environmental scanning electron microscope

Předkládaná práce se zabývá environmentální rastrovací elektronovou mikroskopií. Na začátek je stručně popsána stavba přístroje. Důležitá část práce je věnována interakcím elektronů se vzorkem a signálům vystupujícím ze vzorku. Zejména se práce soustředí na detekci sekundárních elektronů pomocí ionizačního detektoru. Experimentálně je v práci určen vliv pracovních podmínek a velikosti elektrodového systému ionizačního detektoru na velikost detekovaného signálu.Presented work deals with environmental scanning electron microscopy. The construction of the device is described concisely in the beginning. Important part is devoted to interaction of electrons with specimen and signals emitted from the specimen. The work aims especially at detection of secondary electrons using the ionization detector. Experimentally is determined effect of working environment and size of electrode system of ionization detector on detected signal.

Support for Expert Estimations in Transportation Projects

This paper deals with risk analysis as a part of the financial assessment of transportation projects. Two approaches to risk assessment are discussed. A risk can be evaluated either directly in terms of the probabilistic distribution of the assessment criterion; or an indirect determination of the risk can be applied without constructing the probability distribution, but by determining the characteristic features of the project.

A case analysis of a sustainable food supply chain distribution system—A multi-objective approach

Sustainable supply chain management is a topical area which is continuing to grow and evolve. Within supply chains, downstream distribution from producers to customers plays a significant role in the environmental performance of production supply chains. With consumer consciousness growing in the area of sustainable food supply, food distribution needs to embrace and adapt to improve its environmental performance, while still remaining economically competitive. With a particular focus on the dairy industry, a robust solution approach is presented for the design of a capacitated distribution network for a two-layer supply chain involved in the distribution of milk in Ireland. In particular the green multiobjective optimisation model minimises CO2 emissions from transportation and total costs in the distribution chain. These distribution channels are analysed to ensure the non-dominated solutions are distributed along the Pareto fronts. A multi-attribute decision-making approach, TOPSIS, has been used to rank the realistic feasible transportation routes resulting from the trade-offs between total costs and CO2 emissions. The refined realistic solution space allows the decision-makers to geographically locate the sustainable transportation routes. In addition to geographical mapping the decision maker is also presented with a number of alternative analysed scenarios which forcibly open closed distribution routes to build resiliency into the solution approach. In terms of model performance, three separate GA based optimisers have been evaluated and reported upon. In the case presented NSGA-II was found to outperform its counterparts of MOGA-II and HYBRID

A solution method for a two-layer sustainable supply chain distribution model

This article presents an effective solution method for a two-layer, NP-hard sustainable supply chain distribution model. A DoE-guided MOGA-II optimiser based solution method is proposed for locating a set of non-dominated solutions distributed along the Pareto frontier. The solution method allows decision-makers to prioritise the realistic solutions, while focusing on alternate transportation scenarios. The solution method has been implemented for the case of an Irish dairy processing industry׳s two-layer supply chain network. The DoE generates 6100 real feasible solutions after 100 generations of the MOGA-II optimiser which are then refined using statistical experimentation. As the decision-maker is presented with a choice of several distribution routes on the demand side of the two-layer network, TOPSIS is applied to rank the set of non-dominated solutions thus facilitating the selection of the best sustainable distribution route. The solution method characterises the Pareto solutions from disparate scenarios through numerical and statistical experimentations. A set of realistic routes from plants to consumers is derived and mapped which minimises total CO2 emissions and costs where it can be seen that the solution method outperforms existing solution methods

Analysis of Oral Diadochokinesis in Progressive Neurological Diseases via Automated Acoustic Analysis

Tato práce se zabývá problematikou automatické klasifikace neurodegenerativních onemocnění pomocí akustické analýzy orální diadochokineze. Dvě varianty algoritmu pro segmentaci řeči, který je nedílnou součástí pro vyhodnocení diadochokineze, jsou navrženy. Jejich přesnosti jsou porovnány a ten lepší je porovnán s předešlými algoritmy. S využitím tohoto algoritmu jsou pak z promluv pacientů extrahovány příznaky, jejichž významnost je vyhodnocena. Posledním krokem je klasifikace onemocnění s pomocí jednoduchého klasifikátoru. Práce je zakončena diskuzí nad výsledky a návrhy k budoucí práci.This thesis deals with an automated assessment of neurodegenerative diseases by acoustic speech analysis using oral diadochokinesis. Two variants of speech segmentation algorithm necessary for the diadochokinetic task are designed. Their performance is evaluated and compared to previously designed algorithms from the literature. Furthermore, the speech segmentation algorithm is used to extract features from the utterances. The features are evaluated in terms of significance, and a simple classifier is built to distinguish between the neurodegenerative diseases. Finally, we discuss the results and make proposals for future work

Simulation of temperature and airflow in a field distributor with frequency converter

Předkládaná práce se zabývá teorií přenosu tepla a způsoby určení tohoto přenosu. V úvodu je rozebrána teorie tepla a způsoby jeho šíření spolu se souvisejícími veličinami a rovnicemi. Dále se práce věnuje popisu komínovému jevu a vlivu teploty na elektrotechnická zařízení. Je zde popsán průmyslově vyráběný rozváděč firmy ABB řady ACS a analytické řešení přenosu tepla prouděním podle normy IEC 60890. V praktické části najdeme řešení přenosu tepla pomocí výpočtového CFD programu Flow Simulation a je popsána metoda konečných objemů. Důležitá část práce je věnována nastavení a optimalizaci simulace. Na závěr je provedeno několik změn stavby rozváděče a je posuzován jejich vliv na odvod tepla.Presented work deals with heat transfer and its methods. At the beginning thesis describes the theory and the ways of heat transfer with connected quantities and equations. Then it explains the stack effect and impact of temperature on electro technical device. In work is also described ABB driver ACS line and calculation of heat transfer according to IEC 60890 standard. In the practical part there is the calculation of heat transfer in Flow Simulation simulating CFD program solved and finite element method is mentioned. Important part of work is devoted to setting and optimization of simulation. In conclusion are made some changes of construction of driver, dependence on heat transfer is inspected.

Lower Bound and Hybrid ILS-VND for a Location Arc Routing Problem

International audienc

Recherche Local Itérée pour le TSP avec profits

National audienc

A genetic algorithm for the two dimensional bin packing problem with partial conflicts

International audienc