Wyniki wyszukiwania - Biblioteka Nauki

1

Cmac and Its Extensions for Efficient System Modelling

100%

Szabo T. , Horvath G.

International Journal of Applied Mathematics and Computer Science

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1999

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tom Vol. 9, no 3

571-598

EN

This paper deals with the family of CMAC neural networks. The most important properties of this family are the extremely fast learning capability and a special architecture that makes effective digital hardware implementation possible. The paper gives an overview of the classical binary CMAC, shows the limitations of its modelling capability, gives a critical survey of its different extensions and suggests two further modifications. The aim of these modifications is to improve the modelling capability while maintaining the possibility of an effective realization. The basic element of the first suggested hardware structure is a new matrix-vector multiplier which is based on a canonical signed digit (CSD) number representation and a distributed arithmetic. In the other version, a hierarchical network structure and a special sequential training method are proposed which can constitute a trade-off between the approximation error and generalization. The proposed versions (among them a dynamic extension of the originally static CMAC) are suitable for embedded applications where the low cost and relatively high speed operation are the most important requirements.

2

Stability of a circular ring in postcritical equilibrium states with two deformation-dependent loads and geometrical imperfections

100%

Kozak I. , Szabo T.

Computer Assisted Mechanics and Engineering Sciences

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2002

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tom Vol. 9, No. 2

291-308

EN

The circular ring is linearly elastic and its cross-section is rectangular. Two deformation dependent distributed loads, that is follower loads, are applied simultaneously on the outer surface of the ring. The first load is a uniform pressure on the whole outer surface. The second load is uniform normal traction exerted on two surface parts situated in axially symmetric positions. Both loads are selfequilibrated independently from each other. A nonlinear FE program with 3D elements is used for the numerical analysis of a geometrically perfect and two imperfect rings. Displacement control is used in the equilibrium iterations. Equilibrium surfaces are determined in the space of three parameters such as one characteristic displacement coordinate, and two load factors. The stability analysis is performed in the knowledge of the equilibrium surfaces.

3

Estimation of evapotranspiration and crop water-index using active surface temperature

100%

Szabo T. , Toth R.

Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Melioracja

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1990

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nr 35

4

Hatchery testing of GnRH analogue-containing pellets on ovulation in four cyprinid species

80%

Horvath L. , Szabo T. , Burke J.

Polskie Archiwum Hydrobiologii

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1997

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tom 44

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nr 1-2

5

Flowering phenology and fertility of sour cherry [Prunus cerasus L.] cultivars selected in Hungary

80%

Nyeki J. , Szabo T. , Szabo Z.

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2003

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tom 47

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nr 1

6

Impact of COVID-19 on the physical activity and well-being of Hungarian athletes and sports professionals

61%

Szabo T. , Stocker M. , Acs P. , Morvay-Sey K. , Palvolgyi A. , Laczko T.

Health Problems of Civilization

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2020

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tom 14

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nr 3

7

Artificial spawning of Eurasian perch, Perca fluviatilis L. using Ovopel

51%

Kucharczyk D. , Szczerbowski A. , Luczynski M. J. , Kujawa R. , Mamcarz A. , Wyszomirska E. , Szabo T. , Ratajski S.

Archives of Polish Fisheries

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2001

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tom 09

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nr 1

EN

Spermiation and ovulation in the Eurasian perch Perca fluviatilis L. were induced with Ovopel, pellets containing GnRH, and then compared with hCG and CPE. Males from the control group produced a significantly smaller volume of milt (average about 17mlkg BW⁻¹) than those from the hormonally-treated groups (over 24 ml kg BW⁻¹). Spermatozoa motility was similar in both the treated and untreated males, but the fertilization ability varied significantly between individual males. Over 90% of the treated females ovulated. Ovulation in the control group was noted in a limited number of females. Mean embryo survival to the eyed-egg-stage was over 50% in the treated groups, in contrast to 7.5% in the control group. The poor quality of perch gametes might result from high water temperature oscillations before the natural spawning season. The quality of eggs, expressed as survival to the eyed-egg-stage, decreased with latency time.

PL

Celem prowadzonych badań było określenie wpływu stosowania stymulacji hormonalnych na wyniki sztucznego rozrodu okonia. Tarlaki okonia podzielono na trzy grupy (po 12 samic i 7 samców w każdej). Samice z grupy pierwszej otrzymały dwie dawki hormonu (domięśniowo 1000 IU hCG i domięśniowo 0,4 mg CPE, a po 24 h - 3,6 mg CPE), z grupy II - domięśniowo dwie dawki Ovopelu (1/10 tabletki, a po 24 h 1 tabletkę). Samce z grupy I iniekowano 2,0 mg CPE, a z grupy II ½ tabletki Ovopelu. Wszystkie ryby z grupy III (grupa kontrolna) poddano iniekcji 0,9% roztworem NaCl. Samce z grupy kontrolnej produkowały znacznie mniejszą ilość mlecza (średnio 17 ml kg⁻¹) w porównaniu z samcami poddanymi iniekcji hormonalnej, które produkowały średnio 24 ml mlecza w przeliczeniu na kilogram masy ciała. Ruchliwość plemników w nasieniu była podobna u wszystkich badanych grup, jednak zdolność do zapłodnienia była istotnie różna pomiędzy samcami. Wśród samic poddanych iniekcji hormonalnej owulowało ponad 90%, podczas gdy tylko niewielki odsetek samic (17%) z grupy kontrolnej przystąpił do tarła. Średnia przeżywalność embrionów do stadium zaoczkowania w grupach I i II wyniosła 50%, natomiast w grupie kontrolnej jedynie 7,5%. Słaba jakość gamet mogła być wynikiem wysokich skoków temperatury wody przed naturalnym sezonem rozrodczym okonia. Badania wykazały, że Ovopel może być wykorzystywany w celu wywoływania sztucznego tarła okonia, nawet w przypadku zmian temperatury i warunków świetlnych.