The paper presents a novel method of fault location and the calculation of transverse impedance of a fault in a damaged medium voltage cable. The method is based on the measurement of input impedance at one end of the...
The paper presents a novel method of fault location and the calculation of transverse impedance of a fault in a damaged medium voltage cable. The method is based on the measurement of input impedance at one end of the cable with an open and short circuit state at its other end with appropriately selected frequency. The obtained results were compared with those obtained by means of the reflectometer. The effectiveness of the method was verified numerically and experimentally.
The subject of the article is a simulation of heat affected components of a device for deep drawing by extreme conditions in vacuum by high temperatures required for forming of crystallization containers made from thi...
The subject of the article is a simulation of heat affected components of a device for deep drawing by extreme conditions in vacuum by high temperatures required for forming of crystallization containers made from thin molybdenum sheets. The simulation is focused on the distribution of heat in particular components in relation with their shape. There are presented the design of working components and the boundary conditions of transient thermal simulations with the results.
作者：
M PlaczekM MackowskiSilesian University of Technology
Faculty of Mechanical Engineering Institute of Engineering Processes Automation and Integrated Manufacturing Systems Konarskiego 18A 44-100 Gliwice Poland Silesian University of Technology
Faculty of Automatic Control Electronics and Computer Science Institute of Informatics Akademicka 16 44-100 Gliwice Poland
This paper discusses the issue of dependability of a measuring system from the electromagnetic compatibility (EMC) point of view. During the tests, the equipment for conducting electromagnetic compatibility tests was ...
This paper discusses the issue of dependability of a measuring system from the electromagnetic compatibility (EMC) point of view. During the tests, the equipment for conducting electromagnetic compatibility tests was used. The tests were carried out in accordance with the EMC Directive 2014/30/EU and the harmonized standard IEC 61000-4-6. The measuring system equipped with non-classical piezoelectric transducers called MFC was considered. The MFC transducer was used as a sensor connected to the NI 9191 CompactDAQ Chassis. During the research, the influence of conducted disturbances on the transmission wire was examined. One of the elements of the test bench was an EM-clamp (providing both inductive and capacitive coupling) consisting of a tube of split ferrite rings of two different grades, which can be clamped over the cable under test in a non-invasive way.
Following a surgical procedure, patients are monitored in an ICU until physically stable, after which are discharged to a ward for further evaluation and recovery. Usually, ward evaluation does not imply continuous ph...
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sAnalyzing textual data is a very challenging task because of the huge volume of data generated daily. Fundamental issues in text analysis include the lack of structure in document datasets, the need for various prepr...
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The paper presents an optimizing method of energy parameters of three-phase induction motor in order to improve their efficiency class from IE2 to 1E3 or IE4. These efficiency classes are defined in the European stand...
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The paper presents an optimizing method of energy parameters of three-phase induction motor in order to improve their efficiency class from IE2 to 1E3 or IE4. These efficiency classes are defined in the European standard IEC 60034-301:2014. The optimization is performed using specific software by successively adjusting the geometry and the technology. The results have been validated by experiments within the UMEB SA laboratories. The three-phase induction motor that has been analyzed has a rated output of 45 kW, 380V (delta connection), rated speed 1475 rot/min and squirrel-cage rotor type.
The iterative closest point (ICP) problem is very important in multiple fields such as robotics, machine vision, automotive or assistive technologies. The problem is to find the optimal transformation that can align t...
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ISBN:
(纸本)9781509027217
The iterative closest point (ICP) problem is very important in multiple fields such as robotics, machine vision, automotive or assistive technologies. The problem is to find the optimal transformation that can align two sets of 3D points. Even if in the recent year new variations of ICP were proposed, the algorithm may get trapped in local minima due to the non-convexity of the problem. This issue may be overcome if the initial guess is chosen as close as possible to the true solution. In this paper a tensorial based method is proposed for choosing the initial guess of the iterative closest point problem. This new approach is strongly connected with the parameters that can be used to describe the displacement of rigid bodies. Using an isomorphism between the special Euclidean group SE 3 and the orthogonal dual tensors group SO 3 , a detailed procedure is described on how to compute the initial guess for the iterative closest point problem. An evaluation of the proposed method is done using a Matlab framework that implements the ICP algorithm.
The research on assisting visually impaired people to navigate in unknown environments commonly employs image processing or computer vision techniques. One key element that needs to be identified in the surrounding en...
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ISBN:
(纸本)9781509027217
The research on assisting visually impaired people to navigate in unknown environments commonly employs image processing or computer vision techniques. One key element that needs to be identified in the surrounding environment of a blind user is the ground plane. Its accurate detection is highly important because the user is able to move freely in that area. An assistive device should primarily assist the user in avoiding the obstacles that lie on the ground surface. The images that will be further processed are usually acquired using depth acquisition devices worn by the user. Therefore, in contrast with automotive or robotics applications, which also heavily rely on ground plane extraction for obstacle detection, the camera orientation has more degrees of freedom. This leads to the requirement of designing more complex solutions for the ground plane detection in the case of assistive systems for the visually impaired. In this paper we introduce an algorithm to detect the ground plane taking into consideration the orientation of the camera, namely its pitch and roll. The proposed algorithm is based on an efficient processing of the v-disparity map associated to each frame. A two-step decision making approach to determine the most suited area that corresponds to the ground plane is described. Experimental results with synthetic datasets are provided to prove the efficiency and robustness of the proposed approach.
This paper considers cluster detection in Block Markov Chains (BMCs). These Markov chains are characterized by a block structure in their transition matrix. More precisely, the n possible states are divided into a fin...
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