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Feature selection has a great impact on model performance. Most of the attribute picking methods belong to one of the three families – wrappers, filters or embedded approaches. The paper shows the usability of different feature selection methods in predicting a direction of commodity trading price movements. Also, a method for adapting these selectors to work with high-dimensional data is presented...
In this work, we apply a direct method for an approximative solution of a weakly singular integral equations (W.S.I.E) with logarithmic kernel on an oriented smooth contour using a modified linear spline approximation, we also show that this approximation gives an efficient approach to the analytical solution of (W.S.I.E)
The article deals with the development of consumption expenditures (luxury and necessity goods) in SR over time. For this purpose the QUAIDS (Quadratic Almost Ideal Demand System) model was adopted which enabled us to calculate the expenditure elasticities of nine relatively homogeneous commodity groups. Based on these results commodity groups were split into luxury and necessity goods and their evolution...
The article depicts data flow in the process of two-dimensional object digitization. Subject to analysis is RAW to TIFF transformation influence on color reproduction quality: white balansing, demoasicing with noise reduction and sharpening, color space transform, tone reproduction. Color reproduction quality is tested according to FADGI and Metamorfoze guidelines.
This paper presents an approach for action recognition based on binary silhouette sequences extracted from consecutive frames of a video. It uses shape descriptors and correlation coefficient to represent and match entire sequences, regardless the number of frames. Each set of binary silhouettes corresponds to one action, such as jumping or waving. The paper provides experimental results on the use...
In the article σ-convergence for the period of 1996 - 2015 is tested. For testing of σ-convergence various characteristics of real GDP per capita recalculated according to Pur-chasing Power Parity (real GDP per capita in PPP) are calculated, namely: cross-sectional variance, cross-sectional standard deviation and cross-sectional coefficient of variation. In case of σ-convergence these characteristics...
The main idea of the Data Mining (DM) is nowadays as follows: overcoming of the Big Data problematics is possible under use of "data compression" via their transformation into (fuzzy) knowledge. The "heavy-weighting approaches" involving precise analytical techniques and expensive specialized software are used for this aim. On the other hand, there is the opportunity to solve the...
This research is an investigation of nullifying rules influence on speed of parsing grammar type LL(1). As a prototype, it’s considered a free context language based on LL(1) grammar, containing no nullifying rules (ε-rules). It is shown that recognizer which is based on deterministic push-down automaton (DPDA), in this case parses terms of the language in a minimum number of steps equal to length...
The growing interest in business integration and interoperability of IT systems has led to an increase in the importance of Service-Oriented Architecture (SOA), which provides tools for Enterprise Application Integration (EAI). In this sense, Enterprise Service Bus (ESB) provides technical capabilities for communication between IT systems. The aim of this arti-cle is to present the results of performance...
This article focuses on the aspects of the design of mobile applications for remote monitoring and forecasting risks of failure of technical systems components. The paper includes description of the characteristics of user interface design and interaction experience with proposed mobile remote monitoring applications. It describes development of an logical database model for mobile application, grounded...
A persistent problem of interactive computer graphics is feasible rendering of massive (hundreds of millions of primitives) scenes with hardware capabilities and scene data size concurrently growing. While past attempts yielded algorithms and systems achieving realtime frame rates on basic consumer workstations, the display updates can still be too temporally sparse (depending on the scene and underlying...
The main goal of research presented in this paper was to increase the effectiveness of communication with interactive advertising, through the use of eye tracking. Experiments were performed to analyze the interest in advertising content, with a different influence on web users. A statistical analysis of results was conducted, and a fuzzy model based on the results was designed and verified. The analysis...
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