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Choosing the location of the opening cut to expose brown coal deposits – problem solving and decision making with the use of multiple-criteria decision analysis (MCDA)

Sikora Mateusz Henryk

Gospodarka Surowcami Mineralnymi

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2020

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T. 36, z. 1

93--104

EN

Global brown coal resources are estimated to be extracted at around 512 million Mg. They are found in over a dozen countries, including primarily: Australia, China, the Czech Republic, Greece, Germany, Poland, Russia, the United States and Turkey. More than 80% of total brown coal production in the EU takes place in: Germany, Poland, Greece and the Czech Republic. This means that the majority of production still uses conventional fuels, including both hard coal and brown coal. Given the current energy needs in the context of brown coal reserves depletion and the impacts of the current climate and energy policies of the EU, it is very important that all new investments in mining and energy complexes based on brown coal resources must be prepared carefully to ensure high production efficiency and minimize negative environmental impacts. This article attempts to solve a problem involving the choice of the location of the opening cut to expose brown coal deposits. Due to the stratified nature of brown coal deposits and the associated open-cast mining technology used in a continuous mining system with bucket wheel excavators, belt conveyor systems and spreaders, the location of the opening cut is not completely random and the number of potential solutions is finite. The multifaceted technical, organizational, economic, social and environmental problems require a holistic approach to this research problem. Such an approach should take the different, often opposing, perspectives of the many stakeholders into account. These issues can be solved using mathematical tools designed for multiple-criteria decision support. With the proposed method, a ranking of alternatives can be created, depending on the predefined location of the opening cut.

PL

Światowe zasoby węgla brunatnego możliwe do wydobycia szacowane są na około 512 mln Mg i koncentrują się w kilkunastu krajach, przede wszystkim: Australii, Chinach, Czechach, Grecji, Niemczech, Polsce, Rosji, Stanach Zjednoczonych i Turcji. Ponad 80% całkowitej produkcji węgla brunatnego w UE koncentruje się w Niemczech, Polsce, Grecji i Czechach. Mając na uwadze aktualne potrzeby energetyczne w horyzoncie wyczerpujących się obecnie eksploatowanych złóż oraz realia obecnej polityki klimatyczno-energetycznej Unii Europejskiej, bardzo istotne jest, aby ewentualna inwestycja w nowy kompleks górniczo-energetyczny oparty na węglu brunatnym była przygotowana w sposób niezwykle staranny, zapewniający wysoką efektywność produkcji oraz minimalizację negatywnego wpływu na środowisko. Celem artykułu jest wskazanie możliwości rozwiązania problemu badawczego polegającego na opracowaniu metody wyboru lokalizacji wkopu udostępniającego pokład węgla brunatnego. Z uwagi na pokładowy charakter zalegania złóż węgla brunatnego oraz związaną z nim technologię eksploatacji metodą odkrywkową z wykorzystaniem przede wszystkim systemów ciągłych układów koparka-taśmociąg-zwałowarka (KTZ), przestrzenna lokalizacja wkopu udostępniającego nie jest dowolna, a liczba rozwiązań skończona. Wieloaspektowość problematyki obejmująca zagadnienia techniczno-organizacyjne, ekonomiczne, społeczne i środowiskowe wymaga holistycznego podejścia do problemu badawczego uwzględniającego różne, często przeciwstawne punkty widzenia. Problem ten może zostać rozwiązany z wykorzystaniem narzędzi matematycznych dedykowanych do wielokryterialnego wspomagania decyzji. Opracowana metoda pozwala na stworzenie rankingu wariantów w zależności od uprzednio zdefiniowanych lokalizacji wkopów udostępniających.

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Evaluation of robotic cleaning technologies: preserving a british iconic building

Haqqani Ahmed A.H, Seenu N, Janardhanan Mukund, Kuppan Chetty RM

Applied Computer Science

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2020

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Vol. 16, no 2

95--111

EN

The engineering building of the University Leicester built-in 1963 has been a British icon for decades now. Applications of Robotic technologies are uprising nowadays, which provides a contingency to manipulate the benefits of robotics for executing challenging and precarious facade cleaning processes. This paper surveys the facade cleaning robotic technologies exist in the market. It exhibits the comparative analysis of four notorious robotic facade cleaning solutions namely Sky Pro, Gekko, BFMR (Building Façade Maintenance Robot) and Sirius_c. The comparison is executed using Multi Criteria Decision Analysis (MCDA) and Quality Function Deployment (QFD) techniques. This study analyses the performance of the robots based on the critical parameters such as water consumption, cleaning efficiency, cleaning dimensions and ease of implementation. Although none of these robotic solutions are implemented off the shelf, some adaptation on these solutions is necessary for the development of robotic techniques work successfully in real time. This paper proposes a hybrid robotic solution combining the vacuum pump adhesion and wheeled locomotion for the effective cleaning of the complex external building structure based on the MCDA and QFD analysis. It highlights the significant future research directions in this field.

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Multi-Criteria Decision Analysis (MCDA) methods in Life-Cycle Assessment (LCA) : a comparison of private passenger vehicles

Macioł A., Rębiasz B.

Operations Research and Decisions

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2018

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Vol. 28, No. 1

5--26

EN

Analogies between the life cycle assessment (LCA) and multicriteria decision analysis (MCDA) methodologies have been discussed as well as LCA as an MCDA problem for resolving the trade-offs between multiple environmental objectives. The objective of this study is to compare a variety of specialised multicriteria methods and knowledge-based methods used to aggregate the results from LCA. The studies were conducted using examples of LCA on private passenger vehicles. The research used two classical methods for multicriteria decision making (AHP and TOPSIS), the method of conventional (crisp) reasoning and Mamdani’s method of fuzzy inference. The results demonstrate that among the methods analysed, only crisp reasoning does not provide satisfactory results.

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The freight transport effectiveness assessment in the aspect of the use of environmentally friendly vehicles

Szczepański E.

Journal of KONES

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2018

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Vol. 25, No. 4

405--414

EN

The freight transport combines the issue of supply services organization for various types of entities, including large shopping centres, stores of various industries, restaurants, work and leisure places, small-scale outlets, or municipal waste shipments. Due to the location of customers, transport services encounter many difficulties related to infrastructural constraints and increased traffic. This adversely affects the safety and obstructions in traffic and air pollution and thus is a disturbing factor for the lives of inhabitants. There is also a growing problem of the smog in large cities (in Poland, for example, Warsaw or Cracow). Traffic safety, minimization of congestion, and minimization of environmental pollution by transport activities are of particular importance in the development of freight traffic organization plans. In connection with the above, in recent years, the use of Environmentally Friendly Vehicles (EFV) in various spheres of human activity has been dynamically developing, and this concerns the cargo transport. Currently, vehicle manufacturers are providing an increasing number of delivery vehicles and trucks. On the other hand, entrepreneurs planning to implement pro-environmental solutions face a decision problem related to the efficiency of a transport system based on the use of EFV as well as the economic validity of implementing this type of innovation. In connection with the above, in this article, the problem of the impact of transport on the environment and the use of EFV in the freight transport was analysed. The main issues related to the functioning of the transport system and its negative impact on the environment has been presented. Environmental friendly vehicles and their parameters have been characterized. The main decision problems in organizing the transport system, also in the context of the use of EFV, have been identified and analysed. Finally, an example of a model for assessing the efficiency of a transport system with an emphasis on its impact on the environment was presented. The article was concluded with the summary of considerations and the proposal for further work.