Wyniki wyszukiwania - BazTech

1

Technical university students' opinions regarding their vocational training

Onderková I., Cholevová I., Jurman J.

Management Systems in Production Engineering

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2015

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nr 1 (17)

15--21

EN

Students’ opinions on modules and their content that are conducted during the studies as well as students’ future professional plans are an important part of knowledge regarding planning new courses and specializations in order to prepare graduates to apply at the selected position on the labour market. The article presents the results of a survey conducted among the students of the second and third year of bachelor study at Faculty of Mechanical Engineering at the VSB – Technical University of Ostrava, at the beginning of the summer semester of the academic year 2010/2011.

PL

Opinie, pomysły, wymagania i życiowe cele młodych studentów są bardzo istotne z uwagi na potrzebę tworzenia nowych kierunków studiów i bezpośredniego przełożenia na najlepsze przygotowanie do aplikowania na konkretne stanowiska na rynku pracy. Niniejszy artykuł przedstawia wszystkie te informacje jako wyniki przeprowadzonych badań ankietowych. Grupę badawczą stanowili studenci drugiego i trzeciego roku studiów licencjackich na kierunku Inżynieria Mechaniczna, Uniwersytetu Technicznego w Ostrawie, na początku semestru letniego roku akademickiego 2010/2011.

2

Excavation process control with using modern methods in the case of giant machines

Onderková I., Cholevová I.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2014

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nr 37 (109)

72--76

EN

For disintegration process control we need a quantity that respects objectively rock-disintegrating tool interaction with the elimination of human factor. From this, basic requirements for the evaluation quantity given below follow: is available in advance or at the moment of disintegration; minimises the influence of human factor on the resultant effect; evaluates objectively the disintegration process. A measure of efficiency of any disintegration process is the consumption of energy usually related to the unit volume of disintegrated rock; on the basis of analysis done theoretical and practical researches orientated towards the disintegration processes and the verification of objectivity when used in situ (in drilling and tunnelling), at present it is minimised specific volume energy that is the most objective evaluation quantity. This quantity has a general validity for dispersion processes, and thus its use even for the evaluation of diggability on the digging wheel of excavator has a rational basis. In connection with the GIS application for controlling the extracted quantity, an optimal tool is offered for the maximum efficiency of excavation process.

3

Mathematical model of attitude control bucket-wheel excavator

Onderková I., Cholevová I., Jurman J.

Management Systems in Production Engineering

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2013

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nr 3 (11)

14--20

EN

This lecture deals with the application problems of convertibility GPS system at paddle excavator K 800. The claims of the modern operating surface mining of the excavators requires a lot of information for monitoring of mining process, capacity mining, selective extraction etc. The utilization of monitoring the excavator setting by GPS system proved to be the only one proper because the receivers are resistant to the vibration, dust, temperature divergence and weather changeable. Only the direct contact with communications satellite is required. It means that they can´t be located in a metal construction space (shadow caused by construction elements, influence of electrical high voltage cables) even they can´t be located close to the paddle wheel on the paddle boom (shadow possibility caused by cutting edge created during lower gangplanks mining). This is the reason that GPS receivers are set uppermost on the metal construction excavator and the mathematical formulation is required for determination of paddle wheel petting. The relations for calculation of the paddle wheel coordinate were defined mathematically and after that the mathematical model was composed.

PL

Niniejszy artykuł przedstawia problemy związane z możliwościami zastosowania systemu GPS na łopatach kombajnu K800. W chwili obecnej operowanie na powierzchni urabianej wymaga pozyskiwania wielu informacji związanych z monitorowaniem procesu wydobycia oraz ekstrakcją selektywną. Wykorzystanie systemu GPS wydaje się być jedynym prawidłowym sposobem monitorowania, gdyż odbiorniki te są odporne na wibrację, kurz, różnice temperatur oraz zmiany atmosferyczne. Jedynym wymogiem jest komunikacja z systemem satelitarnym. Oznacza to, że nie mogą być one umieszczone w metalowych obudowach, ani w miejsach, które powodują ich osłonięcie lub w sąsiedztwie przewodów wysokiego napięcia. Nie powinny być one montowane również w okolicach koła kombajnu, ze względu na ryzyko zniszczenia wynikające z niewielkiej odległości od narzędzia urabiającego. Z tego względu odbiorniki GPS powinny być umiejscowione w najwyżej położonych punktach maszyny na powierzchni metalowej, stąd też konieczny jest model matematyczny, za pomocą którego wyznaczone zostanie miejsce montażu.

4

The application of the GUHA method while searching dependencies of mine gas emission and barometric pressure changes

Cholevová I., Onderková I.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2012

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nr 31 (103)

49-54

EN

The process of firedamps´ release into worked-out areas, which often communicate with the surface after stopping the coal mining activity is very topical problem in the region of Ostrava. Firedamps contain namely dangerous methane, which is a result of the coalification process. Contemporary findings in this area show that the outflow of firedamps into the atmosphere is above all related to barometer pressure´s development. In 1995, the realization of degassing wells was initiated in region of Slezská Ostrava. Within the fremawork of monitoring, methane concentrations, gas-air mixture amount and barometer rates are measured among others. This paper gives information about mathematic data processing originated from the monitoring unit of the degassing well used for leading of firedamps from the underground, which is situated in Slezská Ostrava region.