Repository logo

Browsing by Subject "parallelization"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Hybrid-parallel formulation of fundamental quantum-chemical algorithms
    (Wydawnictwa AGH, 2011) Mazur, Grzegorz; Makowski, Marcin; Kuna, Dawid
    Hybrid-parallel variants of Hartree-Fock, Kohn-Sham and Moller-Plesset second-level perturbation theory are described. Their efficiency with respect to the serial and MPI-based parallel implementations are measured and briefly analyzed. It is shown that while hybrid parallelization provide increased efficiency in all cases, the magnitude of the effect strongly depends on the features of the particular algorithm.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Parallelized algorithms for finding similar images and object recognition
    (Wydawnictwa AGH, 2013) Frączek, Rafał; Cyganek, Bogusław; Wiatr, Kazimierz
    The paper addresses the issue of searching for similar images and objects in arepository of information. The contained images are annotated with the help of the sparse descriptors. In the presented research, different color and edge histogram descriptors were used. To measure similarities among images,various color descriptors are compared. For this purpose different distance measures were employed. In order to decrease execution time, several code optimization and parallelization methods are proposed. Results of these experiments, as well as discussion of the advantages and limitations of different combinations of metods are presented.