Now showing items 132-151 of 200

    • On a new critical point theorem and some applications to discrete equations 

      Galewski, Marek; Galewska, Elżbieta (AGH University of Science and Technology Press, 2014)
      Using the Fenchel-Young duality we derive a new critical point theorem. We illustrate our results with solvability for certain discrete BVP. Multiple solutions are also considered.
    • On distributed data processing in data grid architecture for a virtual repository 

      Kuliberda, Kamil; Wiślicki, Jacek; Kowalski, Tomasz Marek; Adamus, Radosław; Kaczmarek, Krzysztof; Subieta, Kazimierz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      The article describes the problem of integration of distributed, heterogeneous and fragmented collections of data with application of the virtual repository and the data grid concept. The technology involves: wrappers ...
    • On multi-subjectivity in linguistic summarization of relational databases 

      Niewiadomski, Adam; Superson, Izabela (Komisja Informatyki Polskiej Akademii Nauk, Oddział w Gdańsku, 2014)
      We focus on one of the most powerful computing methods for natural-language-driven representation of data, i.e. on Yager’s concept of a linguistic summary of a relational database (1982). In particular, we introduce an ...
    • On optimal credibility premiums in multiperiod insurance 

      Antoniak, Wojciech; Kałuszka, Marek (Instytut Matematyczny. Polska Akademia Nauk, 2014)
      This paper focuses on the problem of an optimal stream of premiums in a multiperiod credibility model. Formulas are derived for given claim history (screening) and individual information unknown for insurance company ...
    • On properties of a lattice structure for a Wavelet Filter Bank Implementation 

      Stolarek, Jan (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      This paper presents concept of a lattice structure for parametrization and implementation of a Discrete Wavelet Transform. Theoretical properties of the lattice structure are discussed in detail. An algorithm for converting ...
    • On properties of a lattice structure for a wavelet filter bank implementation. Pt. 2 

      Stolarek, Jan (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      This paper continues discussion of a lattice structure for parametrization and implementation of a Discrete Wavelet Transform. Based on an algorithm for converting the lattice structure to a wavelet filter bank coefficients, ...
    • On statistical analysis methods improving epidemiological studies 

      Wosiak, Agnieszka (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2013)
      Nowadays almost all the principles of diagnosis and treatment are determined by the statistical analysis of the observations made by practitioners. The analysis of medical data is therefore one of the most important elements ...
    • On the contribution of the quadratic electrooptic effect to the nonlinear response proportional to the fourth power of modulating field 

      Izdebski, Marek; Kucharczyk, Włodzimierz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2007)
      It is shown that the fourth-order electrooptic effect cannot be measured without a background of the contribution that is proportional to the square of the quadratic electrooptic coefficient. The contribution manifests on ...
    • On the dependence on parameters for second order discrete boundary value problems with the p(k)-Laplacian 

      Smejda, Joanna; Wieteska, Renata (AGH University of Science and Technology Press, 2014)
      In this paper we study the existence and the nonexistence of solutions for the boundary value problems of a class of nonlinear second-order discrete equations depending on a parameter. Variational (the mountain pass ...
    • On the nature temperature dependence of intrinsic quadratic electrooptic coefficients in KDP-type crystals 

      Kucharczyk, Włodzimierz; Ledzion, Rafał; Górski, Piotr; Izdebski, Marek (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      It is shown that the fourth-order electrooptic effect may be responsible for the temperature dependence of the quadratic electrooptic coefficients defined in terms of polarization. An example is given for the ammonium ...
    • On the possibility of measurements of nonlinear electrooptic effects in 432 symmetry crystals 

      Kucharczyk, Włodzimierz; Górski, Piotr; Izdebski, Marek; Ledzion, Rafał (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      It is shown that despite the fact that in 432 point group crystals the linear electrooptic effect is vetoed by symmetry there are configurations for which the third-order effect may appear. The results obtained indicate ...
    • Optimization of measurement conditions of Kerr constant in optical active liquids on the example of castor oil. 

      Nowakowski, Krystian; Perek, Artur; Izdebski, Marek; Ledzion, Rafał; Górski, Piotr (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology Press, 2014)
      The results of measurements of Kerr constant in castor oil, obtained by dynamic-polarimetric method are presented. Variable optical path length and four measurement setup configurations were used. They differed by the ...
    • The origin of the interaction responsible for the difference of hole mobility of thwo derivatives of anthracene 

      Kania, Sylwester; Kuliński, Janusz; Sikorski, Dominik (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2018)
      Hole mobility of the layers built from two anthracene derivatives differing in the substitution of the central benzene ring, i.e. anthrone substituted with only one keto group and anthraquinone substituted with two keto ...
    • Oscillatory properties of solutions of the fourth order difference equations with quasidifferences 

      Jankowski, Robert; Schmeidel, Ewa; Zonenberg, Joanna (2014)
      A class of fourth-order neutral type difference equations with quasidifferences and deviating arguments is considered. Our approach is based on studying the considered equation as a system of a four-dimensional difference ...
    • Outlier Detection Using the Multiobjective Genetic Algorithm 

      Duraj, Agnieszka; Chomątek, Łukasz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology Press, 2017)
      Since almost all datasets may be affected by the presence of anomalies which may skew the interpretation of data, outlier detection has become a crucial element of many datamining applications. Despite the fact that several ...
    • Outlier Phenomenon in Data Interpretation for One Waves Scattering Problem 

      Emets, Volodymyr F.; Rogowski, Jan (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology Press, 2017)
      An outlier is an observation (or measurement) that is different with respect to the other values contained in a given data set. Outliers can occur due to several causes. The measurement can be incorrectly observed, recorded ...
    • Packet switching networks traffic prediction based on radial basis function neural network 

      Zaleski, Arkadiusz; Kacprzak, Tomasz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      New multimedia applications require Quality of Service support, which is still not successfully implemented in current packet-switched networks implementations. This paper presents a concept of neural network predictor, ...
    • Parallel hierarchies for solving Single Source Shortest Path problem 

      Chomątek, Łukasz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2013)
      The problem of route optimization is significant due to the fact of the high availablity of private transport as well as the need of efficient utilization of the corporate fleet. Optimal route can have different meaning ...
    • Particle swarm optimization: the gradient correction 

      Borowska, Bożena; Nadolski, Stefan (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2009)
      In the following paper, the solution of the optimization problem that relied on the determination of the optimal geometry of two cylindrical coil arrangement evoking magnetic field of specific parameters was presented. The ...
    • The Perspectives in Gait Recognition 

      Kowalski, Piotr M. (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology Press, 2018)
      In this paper we provide a detailed information on classical and recent research results in gait recognition. We provide classification of leading concepts, representations, experiments and available datasets. The most ...