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Research background: Export activities are crucial for SMEs' growth and income since they enable businesses to expand abroad. However, SMEs encounter some export impediments, including legislative, tax-related, and cultural-linguistic differences, which increase their export risk. Moreover, since different legislative, tax-related, and cultural conditions affect SMEs' export activities, SMEs' perceptions...
Variable speed drives (VSDs hereafter) are usually very dynamic systems that dispose of high power and very fast time responses. For this reason the VSDs control and electrical parts should be optimally tuned to achieve the target operation abilities. But if the VSDs are able to work in an optimal way, it is necessary to know a lot of VSDs parameters. Some of them are concerning about mechanical parts...
In the design and synthesis of control systems in industrial companies, we have to face lots of unexpected problems caused by interactions between control systems with human operators (automated control systems) and control systems with no human operators (automatic control systems). While there are plenty of recommendations for design, synthesis and optimization of automatic control systems, in case...
Currently, there are a lot of hotel booking systems. However, the quality of the systems and interconnection with another system is very different. In this article, the fuzzy approach and expert system for hotel booking system is proposed. The proposed approach is based on evaluating hotel services for different kinds of hotel guests. The output of the expert system is a proposal of suitable hotel...
The paper deals with the testing of Linguistic Fuzzy-Logic Control (LFLC) for the purposes of interstand sections of continual rolling mills. The tests were focused primarily on properties and robustness of LFLC when exposed to complex time course of load torque of variable speed drives (VSDs). To make the simulation experiments close reality, there was as a part of the tests detailed measurements...
This paper presents the use of modern numerical methods such as Fuzzy Logic Control for control of fast and sensitive non-linear technological processes with sampling period 0.01 [s] or less. The paper presents a real application of the Linguistic Fuzzy-Logic Control, developed at the University of Ostrava for the control of physical models in the Intelligent Systems Laboratory. The paper presents...
Linguistic Fuzzy-Logic Control (LFLC) is a tool developed by University of Ostrava to support an efficient and effective description of a control strategy. By using this tool, it is very easy to make good use of experts' know-how as well as assembling a very complicated control strategy with very good final results in quality. Moreover, the control strategy assembled by LFLC can be easily transmitted...
The article deals with the creation of a mathematical model of a real problem with four discreet flows. Transport processes are repeated at predetermined intervals and they must be time coordinated in three coordination places deployed in a triangular configuration. The main criterion is the amount of downtime of transported elements emerging in coordination places. The optimization task is solved...
The following article proposes fuzzy tool for processing risk analysis in the area of information security. The paper reviews today's approaches (qualitative and quantitative methodologies) and together with already published results proposes a fuzzy tool to support our novel approach. In this paper the fuzzy tool itself is proposed and also every main part of this tool is described. The proposed...
this contribution presents basic information about mathematical and simulation models of variable speed drive and multidrive systems used in continual rolling mills. Also identification process of real rolling mills is mentioned as well as different properties of mechanical boundaries - couplings. Simulation models are realized in a MATLAB / SIMULINK environment as a specific library, which offers...
This paper presents the use of modern numerical methods such as Fuzzy Logic Control for control of very sensitive non-linear fast technological processes with sampling period 0.01 [s] or less. The paper presents a real application of the Linguistic Fuzzy-Logic Control, developed at the University of Ostrava for the control of physical models in the laboratory at the Department of Informatics and Computers...
This paper deals with an adaptive fuzzy mechanism for heating control in smart houses. A fuzzy approach is connected with an expert system and considers various input data which can enter the system. The proposed adaptive mechanism adjusts the thermal comfort rate based on the input data and IF-THEN rules. The knowledge base of the expert system is created based on input data and it is possible to...
Despite suggestions that the global ratio of unsolicited e-mail messages (SPAM) has been decreasing recently, the SPAM ratio values measured in individual SMTP servers have not confirmed this trend. Blacklisting can eliminate a part of SPAM even before their delivery. A multilevel anti-SPAM mechanism is described and the behavior and efficiency of blacklisting using DNSBL is analyzed. Drawbacks of...
This paper deals with the analysis of a pyrolysis unit cooler. The pyrolysis unit is built during solution of a EU grant project focused to the use of non-traditional energy sources, especially to produce hydrocarbon mixture from different type of waste. Pyrolysis gas from the pyrolysis reactor enters to cooling system, consisted of two cooling units. This paper deals with the analysis of the first...
Article deals with the rating web sites combining of heuristic methods with means of numerical linear algebra. The first part deals with theoretical problems of measurement of web pages, which can be solved using an oriented graph and get an evaluation matrix. It describes how to convert this matrix to a Google matrix and earning vector rating web sites. To test these procedures was created a application...
This paper deals with the application of Fuzzy Transform in Control System Identification. The fuzzy transform method is design as a pair of two transform. The first one maps a continuous function to a real vector. The second one, inverse transform, is naturally a mapping from the space of real vectors to the space of continuous function. Later on, more and more applications had been appearing to...
Article deals with design of distributed control of hotair unit. It is describes equipment of hot-air unit and its possibilities. There are information about distributed control and about unit - server connection and about server - client connection. For the remote control hot - air unit via Internet was used the duplex web service. This duplex service contains methods for receiving buffered data...
This paper describes the processing of photographs in the newly created module for 2D modeling, which will be integrated into the system FOTOMNG. This is a usable application in medicine to analyze images of probes and non-invasive examination developed at the department of computer science of the technical university of Ostrava. The module will be his purpose and functionality to build on a previous...
This paper describes development of the module, which analyzes medical images and its use is also possible in sectors other than medicine. A software module can base on events captured on the ECG graph store images, which the event concerned. Since the ECG chart is only available on video, you will need to analyze this video and chart to properly recognize it. This module plugged together with two...
This article deals with the design of a remote control of the robot IR52c. It describes the equipment of the robot and its properties, the connection between the robot and a server. The robot is controlled by a low-level protocol. To control the robot remotely via internet, a web server was created. All methods of a web service are described in this contribution. Another section of the article deals...
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