scholarly journals Safety of Mining Engineering Buildings and Facilities Under Fem Analysis and Catastrophe Theory

2014 ◽  
Author(s):  
Vladimir Viktorovich Pershin ◽  
Dmitriy Ivanovich Nazarov
Keyword(s):  
Catastrophe Theory ◽  
Fem Analysis ◽  
Mining Engineering

Catastrophe Theory in Explaining Price Dynamics on the Real Estate Market

2013 ◽  
Vol 21 (3) ◽  
pp. 51-61 ◽  
Author(s):  
Mirosław Belej
Keyword(s):  
Real Estate ◽  
Catastrophe Theory ◽  
Open Systems ◽  
Real Estate Market ◽  
Sensitivity Threshold ◽  
State Variables ◽  
The Real ◽  
The Real Estate ◽  
The Real Estate Market ◽  
External Stimuli

Abstract The real estate market is an open system, which implies that it is able to exchange signals with other open systems and dynamic systems. The evolution of a market system over time can be described mathematically. If the system's sensitivity threshold to external stimuli is exceeded, it becomes destabilized and moves from a near-balanced state to a state that is far from equilibrium. Those dynamic processes often induce key changes in the system's trajectory of evolution. In search of equilibrium, the system becomes transformed in a process of discontinuous and discrete changes in state variables. The above statement constitutes the research hypothesis in this article. In this study, an attempt was made to develop a mathematical model for visualizing the evolutionary path of the real estate market in the form of continuous changes interrupted by discontinuous changes. The qualitative transformation of the system will be evaluated with the use of the catastrophe theory.

Evolution of Microclimatic Conditions in Paskov Mine / Ewolucja Warunków Mikroklimatycznych W Kopalni Paskov

2012 ◽  
Vol 57 (4) ◽  
pp. 1045-1055
Author(s):  
Pavel Zapletal ◽  
Pavel Prokop ◽  
Vítězslav Košňovský
Keyword(s):  
Coal Mining ◽  
Mining Activity ◽  
Mining Engineering ◽  
Special Program ◽  
Main Subject ◽  
Coal Basin ◽  
Research Activities ◽  
Microclimatic Conditions ◽  
Technical University

Abstract The main subject of this paper focuses on scientific and research activities conducted in the Institute of Mining Engineering and Safety of the VŠB-Technical University of Ostrava. Cooperation between the VŠB-Technical University of Ostrava and OKD A.S., the only representative of coal mining in the Ostrava-Karviná coal basin, has recently begun to develop again. This paper describes an example discussed in a certain study, which has been undertaken for the Paskov mine, OKD a.s., dealing specifically with the evolution of microclimate parameters in mines that depend on the progress of mining activity at deeper levels over a period of several years. To this end, a special program, aimed at determination of the necessary refrigerating capacity, was established at the VŠB-Technical University of Ostrava.

FEM ANALYSIS FOR A NOVEL CONFIGURATION OF BRUSHLESS DC MOTOR WITHOUT PERMANENT MAGNET

2009 ◽  
Vol PIER 98 ◽  
pp. 407-423 ◽  
Author(s):  
Hassan Moradi ◽  
Ebrahim Afjei ◽  
Faramarz Faghihi
Keyword(s):  
Permanent Magnet ◽  
Fem Analysis ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc

FEM Analysis of Bridge-Type Cable System

2001 ◽  
Vol 84 (9) ◽  
pp. 20-27 ◽  
Author(s):  
Aleš Nevařil ◽  
Jiří Kytýr
Keyword(s):  
Fem Analysis ◽  
Cable System ◽  
Bridge Type
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