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The aim of this work was to investigate the influence of electromagnetic fields from various systems on the operation of radio waves based automatic identification systems (RFID).
The authors present the multicriteria decision problems in the IT project management within knowledge areas and process groups defined in PMBOK. PMBOK is a recognized standard for the project managers, published by PMI (Project Management Institute). PMBOK doesn't address multicriteria decision problems or MCDA methods. This article is going to fill this gap. The authors define the decision problems...
Thanks to the ASP.NET technology, laboratory stand for angle rotation measurement capabilities were increased as it's physical layer was fully utilized. PMSM drive control and parallel data acquisition (with the use of absolute encoder, incremental encoder and resistance sensor) were integrated in one intuitive 3W page environment. An embedded system was proposed as an analog and binary to Ethernet...
This paper presents the study of fast discrete convolution calculation with use of the Polynomial Residue Number System (PRNS). Convolution can be based the algorithm similar to polynomial multiplication. The residue arithmetic allows for fast realization of multiplication and addition, which are the most important arithmetic operations in the implementation of convolution. The practical aspects of...
The paper presents the procedure of multicriteria evaluation and selection of subcontractors. The procedure developed for this purpose makes use of the AHP Method (Analytic Hierarchy Process) that enables analyzing multicriteria decision problems and assists decision making. The paper presents the process of subcontractor selection and its possible effect on financial condition of a company. The results...
The paper presents a study for the impact of the information quantity processed in the system of autonomous mobile robot on the energy consumption. Optimization consists in reducing the quantity of computation by limiting the quantity of input data (eg image resolution, number of processed frames per second) when determining an acceptable error control. The paper presents results of experimental studies...
In the paper combined calculation of multiple COG algorithms for different window sizes in parallel is considered. It is possible to process 2D data together instead separate calculation of COG for every window size. Proposed technique uses typical abilities of horizontal and vertical processing available in modem processing devices. Selection of the index values used in the COG is considered and...
One of possible class of two-dimensional cellular automata created by rules with one graph of connections is described in the paper. Basing on the computer simulation, the behaviour of cellular automata generated by rules with rotated and mirror reflected graph is tested. Close similarity between these cellular automata is observed. They process the initial signal (picture) in qualitatively the same...
The article presents example application of the Java environment to develop a program meant for analyzing signals with real-time fault signals in particular, Functional characteristics of that application realized in the mentioned environment has been presented. The application has been developed mainly to simulate operation of criterial algorithms used by power system protection and to verify their...
In the paper the application of the Monte Carlo method for the fast estimation of image quality is investigated. Taking into account the variety of possible distortions present in the images, probably the largest publicly available database of 1700 images with 17 types of distortions has been used for the practical verification of the proposed approach. The analysis has been performed for some of...
An architecture and the FPGA realization of a high-speed residue-to-binary converter for five-bit moduli are presented. The converter algorithm is based on the Chinese Remainder Theorem. The orthogonal projections are obtained by the look-up. The modulo M summation of projections is carried out by using the tree of carry-save adders with the succesive reduction of the sum to 2M range. Succesively...
Neurevise is a brand new software solution, capable of displaying three-dimensional representations of neural cells, stored in text files with a standard "swc" extension. This paper describes its implementation, focusing on programming techniques and underlying technology responsible for displaying the three-dimensional image as well as the editing features. It also highlights the simple...
The paper presents the design and implementation of the radix-4 DFT butterfly with the use of the complex residue number system (CRNS) the modified quadratic residue number system(MQRNS). The MQRNS in addition to the decompositional property of the residue number system allows for the realization of the complex multiplication with three real multiplications. In the Xilinx FPGA Virtex 6 for the 5-bit...
The paper presents two-dimensional non-linear weighted average filter, for which weights were selected using fuzzy logic. The proposed algorithm was tested using test images in 256 shades of grey, jammed using white noise characterised by normal distribution. The mean square error (MSE) measure was used as a criterion for filtration quality assessment. The PIF coefficient was employed to assess filter...
A computer-aided design system for power transformers is presented. The elaborated system consists of computer application aiding the design and discretization process and a module for presentation of the results of calculation and design process. The results of calculations may be presented in a textual or graphic form. The AutoCAD program is used for the graphic presentation.
In the last 30 years, discovery of Terfenol-D has led to development of magnetostrictive actuators. In the paper the mathematical model of magnetostrictive actuator is presented. The model is suitable to describe relation between the input magnetic field, the magnetization in the magnetostrictive rod, the output displacement, magnetostriction and the strain of magnetostriction actuator. Frequency...
This work presents the constructional solution and selected results of the professional microphone preamplifier examination. The constructed system is an adaptation of INA217 integrated system suggested by the technical documentation of Burr-Brown, who is the manufacturer of this component. There are some circuit modifications made by the authors in order to improve the quality of the signal.
Problems related to the acoustic protection of inhabited areas, bordering on large shopping centres, were presented in this article. A virtual model of an area protected with an acoustic screen was presented. The model "was built" in COMSOL environment. Calculations were done for many variants of geometric configuration of the screen. Data acquired from a measuring-experiment were used for...
In the paper an algorithm and computer code for the identification of the hysteresis parameters of the Jiles-Atherton model have been presented. For the identification the Particle Swarm Optimization (PSO) method has been applied. The computer code has been elaborated using Delphi environment. Five design variables have been assumed. Two different materials has been considered. Selected results of...
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