National Repository of Grey Literature 59 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Input data for municipal waste collection routes optimization
Kulich, Marek ; Nevrlý, Vlastimír (referee) ; Pavlas, Martin (advisor)
The aim of the thesis is to describe the systems of collection of separated waste as well as collection monitoring, which includes identification of containers, sensors and data transfer. The data is then summarized and analyzed for use in the optimization software that uses advanced ARP models. The practical part is devoted to the analysis of real data sets. On selected geographical area are determined the parameters of waste, the plan of the collection routes and their evaluation. The use of local infrastructure will be then shown by cartographic representations of the routes in the maps.
Logistic problems and their applications
Žlebek, Petr ; Nevrlý, Vlastimír (referee) ; Pavlas, Martin (advisor)
The thesis deals with transportation problems using optimization methods. The first part summarizes theoretical facts about the graph theory, mathematical programming, transportation problems and genetic algorithm. Those informations are used in the second part of the thesis where the specific transportation model dealing with waste collection management is described. The model is implemented in Matlab environment. Real data from the area of Czech republic are then applied to the model. Finally the results are throughly discussed.
Applications of scheduling algorithms in railway transportation
Fajmon, Michal ; Kokrda, Lukáš (referee) ; Pavlas, Martin (advisor)
Bachelor’s thesis is focused on creation of mathematical model, which uses multiple methodsforwastecollectionatthelevelofmunicipalities.Modelisfocusedon railfreight transport. Main reasons are of lower production of emissions and reduction of burden on road traffic. In order to create model, the knowledge of graph theory, integer and linear programmingisused.CreatedmodelisimplementedinGAMSenvironmentonsmallscale data. At the end there are stated possibilities for further development of the model.
Approximation of spatially-distributed hierarchically organized data
Smejkalová, Veronika ; Žák, Libor (referee) ; Pavlas, Martin (advisor)
The forecast of the waste production is an important information for planning in waste management. The historical data often consists of short time series, therefore traditional prognostic approaches fail. The mathematical model for forecasting of future waste production based on spatially distributed data with hierarchically structure is suggested in this thesis. The approach is based on principles of regression analysis with final balance to ensure the compliance of aggregated data values. The selection of the regression function is a part of mathematical model for high-quality description of data trend. In addition, outlier values are cleared, which occur abundantly in the database. The emphasis is on decomposition of extensive model into subtasks, which lead to a simpler implementation. The output of this thesis is tool tested within case study on municipal waste production data in the Czech Republic.
Transportation systems in waste management
Koutná, Marie ; Pavlas, Martin (referee) ; Gregor, Jiří (advisor)
The aim of the thesis is to elaborate on transport systems in waste management as they represent a key part of the waste management process. Its theoretical part covers legislation in waste management and sorts and systems of household waste collection. In the practical part there are commercially used vehicles chosen out and the fixed costs of their operation determined. Based on operation data, average velocities in an out of urban areas are calculated. As an outcome of a waste transport prices software, the influence of transport distance and waste mass are described, taking the average velocities into account.
Environmental aspect of optimal waste management design
Šťastná, Liliana ; Šomplák, Radovan (referee) ; Pavlas, Martin (advisor)
This bachelor thesis of research character is focused on a life cycle assessment method LCA (life cycle assessment), especially at impact assessment LCIA (life cycle impact assessment). At the beginning of this thesis, there is an introduction to LCA method and characterization of its stages with a closer focus on the LCIA and associated methodologies. The thesis characterizes basic categories of impact and also substances with immission limits that have an impact on the categories of impact. Then there is an evaluation of the quality of air in recent years and the emissions of the TERMIZO incinerator in Liberec.
Dispersion studies for logistic problems
Dvořáček, Jan ; Šomplák, Radovan (referee) ; Pavlas, Martin (advisor)
Presented diploma thesis deals with the application of dispersion modelling of emissions from stationary sources of pollution as a potential tool which can be used for data preparation in reverse logistic models. In this case, the stationary source is represented by a waste-to-energy plant. The thesis consists of two main parts -- theoretical and computational. Firstly, emission sources and pollutants originating in thermal waste treatment are discussed. In the second chapter, legislation linked to the problem of air pollution is listed and the topics of current air quality in the Czech Republic and dispersion studies are outlined. Closing section of the theoretical part provides information about the principals of dispersion calculations and classification of dispersion models is given. In the computational part, the used dispersion software SYMOS'97 is introduced and the series of conducted calculations is presented. The calculations investigated the influence of plant capacity, dispersion conditions and terrain on the results. The input data of plant capacity and wind rose were indicated as key parameters in the calculation. The final evaluation revealed a good potential of the used dispersion model as a support tool in reverse logistic models.
Bio-gas plant heat utilisation effectivity analysis
Šmarda, Marek ; Frič, Ondřej (referee) ; Pavlas, Martin (advisor)
This thesis focuses on the analysis of heat efficiency and effectiveness of the Vojtěchov biogas station unit. The material balances were developed in connection with biogas created in the cogeneration unit. The heat produced by the cogeneration unit is distributed to reactors and drying rooms. Pursuing the main goal of the thesis, the research of the complete heating balance for all months has been conducted. Additionally, a variety of options were assessed, to find the best solution of how to increase the effectivity of the heat. As for the final solution, two recommendations have been proposed in the thesis. The first recommendation lies in a better usage of low-level heat distributed to the secondary fermentor. The second suggestion deals with the amount of heat from cogeneration unit to the system. The result of the analysis is the final recommendation on how to increase the efficiency of the heat usage and potential impacts of the solution on the subsidy according to the KVET standards received in the given year.
Operational research in waste recycling
Camara, Assa ; Popela, Pavel (referee) ; Pavlas, Martin (advisor)
The bachelor thesis is aimed at finding and describing a mathematical model that reconstructs the actual current financial costs of collecting and collecting waste at the level of municipalities with expanded scope, which are not easily available and are needed for further planning in waste management. In order to create the model, the knowledge of optimization, statistics and graph theory are summarized in the text. The model is applied to real data in the GAMS environment. The results of the application are commented on and analysed. Based on this analysis, there are also possibilities to develop this model.
Optimization of rail waste transportation
Ambrozková, Anna ; Hrabec, Dušan (referee) ; Pavlas, Martin (advisor)
The bachelor thesis focuses on optimization of rail waste transportation. Theoretical part is about graph theory and optimization, where is introduced for example representation of graphs, network flows or linear programming. Practical part deals with comparison of road and rail networks, motivational example and at least with the application on real data of whole Czech Republic.

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3 Pavlas, Michal
4 Pavlas, Miroslav
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