Temat: racing performance - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Genetic aspects of racing performance in Polish pure-bred Arab horses. I. Genetic parameters
Autorzy:: Sobczynska, M
Kownacki, M
Powiązania:: https://bibliotekanauki.pl/articles/2047090.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: racing performance
horse
heritability
animal breeding
purebred Arabian breed
genetic parameter
Opis:: The objective of this study was to estimate variance components of Polish Arab horses’ racing performance. The traits studied were the log of annual earnings and rank. Fixed effects of the year of race, herd, sex, the annual number of starts and random animal and permanent environment effects were evaluated on both earnings and rank at finish in Polish Arab horses. The obtained data included 2243 records on 4- and 5-year-old horses by 143 sires. Only races in which 4- and 5-year-olds competed were used. Heritability estimates of earnings and rank at finish were 0.22 and 0.25, respectively. Repeatability estimates of these traits were the same as heritability estimates. All the estimates of genetic and phenotypic correlations between the log of earnings and rank at finish were high and positive. Earnings and rank are good criteria for genetic improvement. Rank seems to be a better measure of racing performance.
Źródło:: Journal of Applied Genetics; 1997, 38, 2; 179-186
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Genetic aspects of racing performance in Polish pure bred Arab horses. II. Genetic trends
Autorzy:: Sobczynska, M
Kownacki, M
Powiązania:: https://bibliotekanauki.pl/articles/2046680.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: racing performance
horse
pure breed
Polska
animal breeding
population
genetic trend
animal model
purebred Arabian breed
Opis:: The objective of this study was to estimate genetic trends in the Polish Arab horses population. Annual earnings and rank at finish in fiat races of Polish Arab horses from 1951 to 1993 were analysed with a BLUP animal model. The collected data included 2,234 records of 1,640 4- and 5-year old horses from 143 sires. Only races, in which horses of at least two mentioned age groups took part, were taken into consideration. The model included an individual additive genetic effect as random, the year of race, herd, sex, age, number of starts and the year of race X age effects as fixed effects. Genetic trends were estimated from differences between horses belonging to different age groups and racing in the same year. The annual genetic gains from 1951 to 1993 were 3.5% and 12.3% of the genetic standard deviation for the log of earnings and rank at finish, respectively. Although the main role in breeding Arab horses is played by beauty and exterior, small genetic progress in the log of earnings and rank at finish was obtained.
Źródło:: Journal of Applied Genetics; 1997, 38, 3; 303-308
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: High-performance simulation-based algorithms for an alpine ski racer’s trajectory optimization in heterogeneous computer systems
Autorzy:: Dębski, R.
Powiązania:: https://bibliotekanauki.pl/articles/330952.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: trajectory optimization
heterogeneous computing
GPGPU
high performance computing
alpine ski racing
optymalizacja trajektorii
obliczenia heterogeniczne
obliczenia wysokiej wydajności
narciarstwo alpejskie
Opis:: Effective, simulation-based trajectory optimization algorithms adapted to heterogeneous computers are studied with reference to the problem taken from alpine ski racing (the presented solution is probably the most general one published so far). The key idea behind these algorithms is to use a grid-based discretization scheme to transform the continuous optimization problem into a search problem over a specially constructed finite graph, and then to apply dynamic programming to find an approximation of the global solution. In the analyzed example it is the minimum-time ski line, represented as a piecewise-linear function (a method of elimination of unfeasible solutions is proposed). Serial and parallel versions of the basic optimization algorithm are presented in detail (pseudo-code, time and memory complexity). Possible extensions of the basic algorithm are also described. The implementation of these algorithms is based on OpenCL. The included experimental results show that contemporary heterogeneous computers can be treated as μ-HPC platforms—they offer high performance (the best speedup was equal to 128) while remaining energy and cost efficient (which is crucial in embedded systems, e.g., trajectory planners of autonomous robots). The presented algorithms can be applied to many trajectory optimization problems, including those having a black-box represented performance measure.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2014, 24, 3; 551-566
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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