Czestochowa University of Technology
Czestochowa, Poland

Częstochowa University of Technology is the largest and oldest institution of higher education in Częstochowa, Poland. All faculties of the University have the right to grant doctoral degrees , and three of them also offer PhD habilitation. Wikipedia.

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Agency: European Commission | Branch: H2020 | Program: MSCA-RISE | Phase: MSCA-RISE-2015 | Award Amount: 936.00K | Year: 2015

Several R&D centres herein undertake the investigation of the reduction of the abnormal combustion phenomena of knock in internal combustion engines. Combustion knock limits the efficiency of the engine and deteriorates engine performance while simultaneously contributing to engine destruction, hence reduces engine reliability. Reducing or eliminating combustion knock increases durability and also engine efficiency, hence reducing CO2 emissions. The inter-sectoral research encompassed in this proposal concerns high-power stationary engines fuelled with gaseous fuels working in combined heat and power (CHP) systems. The proposal intends to apply a multidisciplinary approach to knock investigation encompassing fuel chemistry, combustible mixture preparation, ignition phenomena, flame propagation, knock detection and its prediction. Both modelling studies and experimentation in these fields will be performed. As result of the synergies and breadth of expertise, a resultant acceleration in research finding is expected with complementary investigation conducted within both the companies (Wartsila, AVL, Motortech) and universities involved that finally should result in solving the related challenges. Knowledge exchange will be done by research staff secondments, where experienced scientists will work both as advisors and active researchers in the ongoing projects. Engineers coming to universities will be familiar with original techniques for data acquisition as well as methods for signal processing and theoretical analysis of combustion process in the engine. Young research staff from companies will have opportunities to work with academic mentors. Further academic staff will become familiar with industrial approaches to research extending the knowledge. Knowledge transfer will be also done through regularly scheduled seminars and webinars. This collaboration and staff exchanges between the participants build lasting ties and continued after project termination.

Marek M.,Czestochowa University of Technology
Journal of Physics: Conference Series | Year: 2016

In this work, a new method is proposed for calculation of one of the essentials geometrical parameters characterising a packed bed - tortuosity. The geometry of random packings of cylinders and rings (with various packing densities) is numerically generated with Discrete Element Method approach. For flow calculations in a highly complex geometry of a random packed bed, immersed boundary method is employed (with direct forcing variant). The obtained flow velocity field allows for calculation of tortuosity using two methods: by passive advection of massless particles and by comparison of the mean flow velocity magnitude with the mean streamwise velocity component. It is demonstrated that for the packings of low density these two methods are in a good agreement but may diverge for dense packings. Frequency distribution of tortuosity values for individual flow paths is also examined. The results show more frequent occurrence of low-tortuosity paths for coarse packings. © Published under licence by IOP Publishing Ltd.

Agency: European Commission | Branch: FP7 | Program: MC-IRSES | Phase: FP7-PEOPLE-2013-IRSES | Award Amount: 300.30K | Year: 2014

Coal combustion is the main source for producing energy. Nowadays, the reduction of CO2 emission from energy sector is the most important field of research. Refinement and development of current technology are the main activities in this proposal. Transfer of knowledge and experience in the area of innovation CO2 capture technology is the main goal of the Proposal. Those activities allow to reduction CO2 into atmosphere. Leading organizations in the fields of innovative research on CO2 capture also oxy fuel combustion were invited to participate in CO2TRIP project. Activities shall be conducted by staff exchange, joint research, seminars, workshops and lectures. Joint research take into account technology as follows: advanced adsorption, oxy fuel combustion and chemical looping combustion. The CO2TRIP project will last four years and it will be coordinated by the Czestochowa University of Technology, Poland with participation universities from Germany, United Kingdom, China, Japan, USA, and Australia. The duration of this project will be four years. The proposal will provide the necessary skills development through joint work both on a laboratory and pilot scale. Common interests all partners of CO2TRIP Consortium in advanced energy generation technologies with CO2 capture are very complementary. The main aims is to strengthen research partnerships through staff exchanges and networking activities between Partners. In addition to achieving scientific results in a particular area, the CO2TRIP project is above all expected to create additional benefits for the participants in terms of transfer of knowledge and to generate a basis for sustainable cooperation. The activities within the proposed Project is divided into 6 Work Packages. Those Work Packages are related and complementary. The proposed project will help to increase the transfer of knowledge between Partners as well as allow to build the basis for long-term cooperation.

Szczesniak R.,Czestochowa University of Technology
PLoS ONE | Year: 2012

The pairing mechanism for the high-Tc superconductors based on the electron-phonon (EPH) and electron-electron-phonon (EEPH) interactions has been presented. On the fold mean-field level, it has been proven, that the obtained s-wave model supplements the predictions based on the BCS van Hove scenario. In particular: (i) For strong EEPH coupling and T < Tc the energy gap (Δtot) is very weak temperature dependent; up to the critical temperature Δtot extends into the anomalous normal state to the Nernst temperature. (ii) The model explains well the experimental dependence of the ratio R1 ≡ 2Δtot (0)/kBTC on doping for the reported superconductors in the terms of the few fundamental parameters. In the presented paper, the properties of the d-wave superconducting state in the two-dimensional system have been also studied. The obtained results, like for s-wave, have shown the energy gap amplitude crossover from the BCS to non-BCS behavior, as the value of the EEPH potential increases. However, for T>TC the energy gap amplitude extends into the anomalous normal state to the pseudogap temperature. Finally, it has been presented that the anisotropic model explains the dependence of the ratio R1 on doping for the considered superconductors. © 2012 Radosław Szcze{ogonek}śniak.

Dudek G.,Czestochowa University of Technology
Expert Systems with Applications | Year: 2013

An approach for solving the unit commitment problem based on genetic algorithm with binary representation of the unit start-up and shut-down times is presented. The proposed definition of the decision variables and their binary representation reduce the solution space and computational time in comparison to the classical genetic algorithm approach to unit commitment. The method incorporates time-dependent start-up costs, demand and reserve constraints, minimum up and down time constraints and units power generation limits. Penalty functions are applied to the infeasible solutions. Test results showed an improvement in effectiveness and computational time compared to results obtained from genetic algorithm with standard binary representation of the unit states and other methods. © 2013 Elsevier Ltd. All rights reserved.

Marek M.,Czestochowa University of Technology
Physica D: Nonlinear Phenomena | Year: 2013

Growth processes simulated on a regular cellular automaton grid with simple capture rules are considerably influenced by the structure of the grid. Some of the growth directions are favored over others leading to highly anisotropic or, at least, orientation-dependent growth pattern. A new method is proposed for significant reduction of artificial grid anisotropy in 2D and 3D cellular automata with continuous state variable. The method employs additional diffusion process controlling the growth rate and allows for isotropic or anisotropic growth where the anisotropy is decoupled from the grid structure. Verification of the method is provided in the case of isotropic circular growth, isotropic growth of various shapes in uniform and spatially varying fields, and anisotropic growth with respect to orientation and symmetry of the pattern. Finally, the reduction of grid anisotropy is demonstrated in 2D simulation of dendritic grain growth in pure metal. The shape of the grain is shown to be virtually independent of the orientation. An example growth of a grain with six-fold symmetry is also included. © 2013 Elsevier B.V. All rights reserved.

Kulej T.,Czestochowa University of Technology
International Journal of Circuit Theory and Applications | Year: 2015

A new 0.5-V bulk-driven operational transconductance amplifier (OTA), designed in 50 nm CMOS technology, is presented in the paper. The circuit is characterized by improved linearity and dynamic range obtained for MOS devices operating in moderate inversion region. Some basic applications of the OTA such as a voltage integrator and a second-order low-pass filter have also been described. The filter is compared to other low-voltage filters presented in the literature. Copyright © 2013 John Wiley & Sons, Ltd.

Dudek G.,Czestochowa University of Technology
IEEE Transactions on Evolutionary Computation | Year: 2012

A new multiclass classifier based on immune system principles is proposed. The unique feature of this classifier is the embedded property of local feature selection. This method of feature selection was inspired by the binding of an antibody to an antigen, which occurs between amino acid residues forming an epitope and a paratope. Only certain selected residues (so-called energetic residues) take part in the binding. Antibody receptors are formed during the clonal selection process. Antibodies binding (recognizing) with most antigens (instances) create an immune memory set. This set can be reduced during an optional apoptosis process. Local feature selection and apoptosis result in data-reduction capabilities. The amount of data required for classification was reduced by up to 99%. The classifier has only two user-settable parameters controlling the global-local properties of the feature space searching. The performance of the classifier was tested on several benchmark problems. The comparative tests were performed using k-NN, support vector machines, and random forest classifiers. The obtained results indicate good performance of the proposed classifier in comparison with both other immune inspired classifiers and other classifiers in general. © 2012 IEEE.

Tutak W.,Czestochowa University of Technology
Energy Conversion and Management | Year: 2014

This study investigates the potential of E85 fuelling in a diesel engine. Researches were performed using a three-cylinder a direct injection diesel engine. A dual-fuelling technology is implemented such that E85 is introduced into the intake manifold using a port-fuel injector while diesel is injected directly into the cylinder. The primary aim of the study was to determine the operating parameters of the engine powered on E85 bioethanol fuel in dual fuel system. The parameters that were taken into account are: engine efficiency, indicated mean effective pressure, heat release rate, combustion duration and ignition delay, combustion phasing and exhaust toxicity. With E85 fuel participation, NOx and soot emissions were reduced, whereas CO and HC emissions increased considerably. It was found that E85 participation in a combustible mixture reduced the excess air factor for the engine and this led to increased emissions of CO and HC, but decreased emissions of nitrogen oxides and soot. © 2014 Elsevier Ltd. All rights reserved.

Czestochowa University of Technology | Date: 2014-01-23

This invention relates to a high resolution and low dosage tomographic imaging in three dimensions, and more particularly, to a fully analytical fast iterative statistical algorithm for image reconstruction from projections obtained in a spiral cone-beam x-ray scanner is described. The presented method allows to improve the resolution of the reconstructed images and/or to decrease the x-ray intensity while maintaining the quality of the obtained CT images, because the signals obtained are adapted to the specific statistics for this imaging technique. The location of pixels in a reconstructed image and the location of detectors in a detector array in this new approach are described. The topology of pixels and detectors presented here avoids an inconsistency in the distribution of the coefficients assigned to the pixels in the image, which appears in the formulation of the analytical iterative statistical reconstruction problem.

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