Iskanje po katalogu digitalne knjižnice

Opis: Interspecific hybridisation within the genus Phaseolus represents an importantsource of genetic variation which can be very useful in breeding programmes based on recurrent selection. The aim of this investigation was to analyse the phenotypic variation and relationships among the most important quantitative traits in F2 generation materials derived from crosses P. vulgaris x P. coccienus. P. vulgaris was used as female while P. coccineus as male parent. The F2 material was composed of 825 individuals which originated from open pollination of 65 F1 plants. The most variable quantitative trait was the number of flowers per inflorescence, which varied from 0 to 57 (CV=45,8 %). The second was the inflorescence length which varied from 2.5 to 74 cm (CV=39,0 %). The highest value (CV=70.4 %) was obtained for floral colour (a qualitative trait which was transformed into a special numerical scale).The correlation analysis showed that there were close relationships among the number of leaves, number of flowers, number of pods, number of seedsand the length of the growth period. For practical breeding, the most useful is probably the correlation between the number of inflorescences and the number of seeds per plant (r=0.503 and 0.560) because the number of inflorescences can be easily determined at the beginning of the hybridisation period, and the number of seeds is more or less directly associated with the yield. For the final visual selection, at the end of the vegetation period, the most useful trait is the number of pods, which is highly correlated with the number of seeds (r=0.740 and 0.916)
Ključne besede: interspecific hybrids, Phaseolus vulgaris x P. coccineus, hybridisation technique, phenotypic variation, phenotypic correlation coefficients
Objavljeno v DKUM: 10.07.2015; Ogledov: 1584; Prenosov: 44
Povezava na celotno besedilo

Opis: Semantic dictionaries as well as knowledge bases are im- portant source of information for natural language process- ing. Using corpus and algorithms for constructing semantic space, we can quickly construct semantic dictionary, which is exploit to supplement the knowledge base. Algorithm for constructing semantic space, COALS was chosen. Semantic distance between terms in semantic space reveals their sim- ilarity, which is used to add semantic relationships in the dictionary. Semantic dictionary also serves to assist in iden- tifying entities and in relation extraction, to supplement the knowledge base.
Ključne besede: semantic space, correlation, semantic dictionary, knowledge base
Objavljeno v DKUM: 22.06.2015; Ogledov: 1937; Prenosov: 44
Povezava na datoteko

Opis: The combustion process for using municipal solid waste as a fuel within a waste to energy plant calls for a detailed understanding of the following phenomena. Firstly, this process depends on many input parameters such as proximate and ultimate analyses, the season of the year, primary and secondary inlet air velocities and, secondly, on output parameters such as the temperatures or mass-flow rates of the combustible products. The variability and mutual dependence of these parameters can be difficult to manage in practice. Another problem is how these parameters can be tuned to achieving optimal combustible conditions with minimal pollutant emissions, during the plant-design phase. in order to meet these goals, a waste-to-energy plant with bed combustion was investigated by using computational fluid-dynamics approach. The adequate variable input boundary conditions based on the real measurement are used and the whole computational work is updated using real plant geometry and the appropriate turbulence, combustion, or heat transfer models. The operating parameters were optimized on output parameters through a trade-off study. The different operating conditions were varied and the combustible products were predicted and visualized. Finally, the response charts and matrix among the input and output parameters during the optimization process are presented, which monitored the dependence among these parameters.
Ključne besede: municipal solid waste, bed combustion, computational fluid dynamics, numerical optimization, goal driven optimization, trade-off study, parameters correlation
Objavljeno v DKUM: 01.06.2012; Ogledov: 2104; Prenosov: 195
Celotno besedilo (1,83 MB)
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