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The deep understanding of physical processes and availability of accurate mathematical models are necessary for design and manufacturing of high efficiency solar cells. It allows to predict more precisely the characteristics of solar cells in dependence of photovoltaic properties of materials and constructions. The method of calculating of the collection efficiency of photogenerated charge carriers...
In this study, an embedded system that performs compensation of the thermocouple output characteristic curve nonlinearities was designed. Mixed-signal microcontroller's peripheral units are used to amplify the low output voltage of the thermocouple to a desired level and and converted to digital without additional circuit elements, and noise reduction is implemented with a digital filter. Cold junction...
The article discusses self-orthogonal error-correcting codes (SOC) for the decoding of which multithreshold algorithms (MTD) are usually used. To decode SOC the algorithms used for low-density parity-check (LDPC) codes can also be applied. The article shows that using a min-sum decoder for SOC over a channel with additive white Gaussian noise (AWGN) in case of binary phase shift keying allows to receive...
This work aims to modify the structure of frequency-multichannel filter for processing fluctuating signals with staggered period, analyze the efficiency of the modified filter and estimate additional computational costs required for its implementation in comparison with frequency-multichannel filter based on the fast Fourier transform (FFT). We also consider the issues involved in simplification of...
This paper describes the relatively simple algorithm for quick calculating rough estimators of point source coordinates within an image formed by onboard IR-sensor having the line of photoelements with interlaced photosensitive squares. It is assumed that the diameter of the light spot from the point object is equal to the size of the photoelement. The algorithm based on the iterative least square...
Contour detection is often utilized algorithm in picture processing. Sometimes is useful to localize edges with sub-pixel accuracy. In this paper we discuss about precise position of edge which is moving during the exposure time. To localize moving edge we define accumulative function and then we use three edge detection algorithms with sub-pixel accuracy in 1-D images: algorithm based on approximation...
In the paper, an image watermark procedure based on Hermite projection method is presented. The watermark is embedded into the coefficients used for the Hermite expansion. Different number of the Hermite function is chosen for the image reconstruction and at the same time, watermark embedding. Therefore, image compression and watermarking is done within the same procedure. This enables the protection...
One of parts of digital signal processing is processing with undersampling. In this case, the sampling frequency is lower, than it is required by the sampling theorem. At undersampling, the spectrum of signals is distorted by an aliasing. Various ways of correction of the arising distortions are known. These ways are known under the name the unaliasing. In this article, one more method of the unaliasing...
Actual problems arising in the development of on-board vision systems for aircraft are considered. The algorithm for heterogeneous image (real TV-image and image of digital terrain map) registration is analyzed. We offer several approaches to improve image synthesis in combined vision system. Results of experimental research of proposed approaches are shown.
The talk will address the current and near future challenges in the power and energy sector with a view to providing a general outlook of the opportunities and challenges in employing ICT to enhance and optimise the process of production, distribution and consumption of electric energy.
Cryptography finds its application area in many contemporary object of daily usage. GSM communication, credit cards, tickets for public transport or RFID tags employ cryptographic features either to protect privacy or to ensure trustworthy authentication. However, many such objects are vulnerable to certain cryptanalytical attacks. In our presentation we will discuss how FPGA-based cryptanalytical...
The recent spectacular progress in the microelectronic, information, communication, material and sensor technologies created a big stimulus towards development of smart communicating cyber-physical systems (CPS). CPS connected to Internet started to form the Internet of Things (IoT) that is undergoing an explosive growth. In 2013 there were approximately 12.1 billion internet-connected devices, and...
The aim of this work is to promote the application of computer science and skills in projecting web-based and mobile systems for training and improving in the field of biomedical engineering. The main role of such project system is reflected in unification and publishing educational contents in the fields of ECG signals, assigned for students and teachers of medicine and biomedical engineering. The...
This paper deals with advanced approaches which may increase traffic safety. The solutions suggested in this paper work in real time and therefore make it possible to effectively warn a specific driver about a situation which could threaten their safety. In the beginning the concept of RADIO-HELP is explained. This system is designed to distribute warning messages to drivers automatically and the...
In the paper a method of determination the driver's psycho-emotional state parameters is described. The determination is performed in time domain on the basis of a non-linear integral electrocardiosignal analysis. It is proposed to generate a threshold level dynamically for increase the reliability of time samples parameters determination, taking into account the value of the signal's variation coefficient.
The aim of this paper is to propose a complementary Health Management module to monitor the GPS accuracy for autonomous vehicles. Based on sensor information, the error causes of GPS can be observed in some specific contexts (urban, climate…). The proposed module relies on a Bayesian Network model that allows to reinforce the belief of GPS failure based on evidence. A hardware/software implementation...
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