During technical education it is a very difficult yet essential task to develop the good logical engineering thinking of students or pupils. One main part of this thinking is the determination of the optimal set of required input parameters for the calculation task mentioned above. The LogTreeMM (Logical Tree of Mathematical Modelling) method can help to solve this task. The aim of this paper is to show modification of the LogTreeMM method to determine the required parameters of a mathematical model by a simple case study.
The aim of our work is to compare the results of a virtual model to measure heat transfer data for butt welded joints. The primary goal is to compare real-time measured temperature with the software simulated data. The virtual model is a copy of the real product, technically a virtual prototyping process is examined. Prior to any production process such as joining by butt welding, real process parameters are tested on the model and later by experiments. In the case of many parts, the joining process is a key technology, where knowledge of the thermal effects of welding on the microstructure in the heat affected zone and the joint are vital.
Robert Bocsi, László Hanák, Dóra Rippel-Pethő and Zoltán Hodai
Modelling heat transfer problems are often carried out by using experimental data not only pure analytical methods. These solutions are affected by several parameters, so the deduction of formulas, based on complicated interactions, cannot be solved without theoretical knowledge. our goal is on base of similarity theory building a model of heat transfer properties of an open pond that installed in climate of Hungary. in our work we have calculated heat transfer on the surface of an open pond by evaporation for the base of future studies.
Viktor Balázs, László Szilágyi, Antal Apagyi and Timotei István Erdei
Nowdays, accidents tend to happen because our attention is being split up by the ever-growing influx of information, losing the focus from the driving, traffic signs, and other signals. The consequences of these minor or major accidents weight down on our shoulders. During our project, we tried to eliminate, or help this issue, using present technology, improving upon that, trying to avoid these accidents. Our task consisted on implementing a software, that could identify traffic signs from any video streams.
Nowadays, international and national events clearly point out the need for cooperation between different defense organizations in crisis and emergency situations (disaster events, migration issues, and other emergencies) for successful tasks. The fundamental basis of this cooperation is always the command and control activity supported by modern technical equipment that ensures the coordinated implementation of tasks. The key, human element of info-communication support is the preparation and training of the successful professionals. In this paper, the authors intend to present the importance of vocational training.
In this work, the moisture absorbance of 6 different building insulation materials are inspected in a laboratory environment. After being dried to a constant weight, the materials were exposed to five different, equally distributed, relative humidity environments, ranging from 0% to 100%. At each chosen relative humidity range the weight of absorbed water content was measured. Then the results were analysed. The insulation materials were then ranked using results from this and the author’s previous work.
Today’s vehicles are becoming more and more complex in order to meet the ever increasing safety and comfort requirements. Most people usually do not consider the car sitting in their driveway to be on the leading edge of new technology. However, for most people, the personal automobile has now become their initial exposure to new intelligent computational technologies such as fuzzy logic, neural networks, adaptive computing, voice recognition and others. This paper explores the sensory-network of electric vehicles and analyses it from a security and reliability perspective.
In this paper, we investigate the characteristics of an object’s vibration in identifying its material of construction. A simple vibration test is performed to classify different types of materials. The test is done by performing small hammer excitation on the object then recording its vibration using one acceleration sensor. Four different materials were tested (steel, hardwood, softwood, and plastic). The vibration signal was analyzed using MATLAB based model. The trained model was able to recognize the testing samples of each material. The advantages of this method are that it is accurate, fast and simple, can be performed on-site and is relatively inexpensive.
László Péter Pusztai, Balázs Kocsi, István Budai and Lajos Nagy
It is essential for every company to know their business processes well, because these companies must allocate their resources in an efficient way in order to keep or strengthen their market position. During the research we aimed at optimizing the material flow at a wooden box producer company with the use of the generalized network flow model as this model is widely used for modelling production processes. In the first part of our work we calculated the optimal material flows focusing on two objectives, and in the second part we determined a compromise solution. Finally, we compared and evaluated the results of the three models.
Bence Márk Szeszák, György Juhász, Gusztáv Áron Sziki, Rita Nagyné Kondor, Tamás Sádor Sütő and Krisztián József Veszelszki
In this publication we present a vehicle dynamic model and the motion of equation for pneumobiles. One of the input parameters of the model is the rolling resistance coefficient of the tyres. The present publication describes the experimental setup and work in the course of which the above coefficient was measured and the effect of tyre pressure on rolling resistance was analysed. During the measurement, we examined the effect of tyre pressure on rolling resistance, including when the vehicle in unloaded and in loaded state.