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Uporaba ultrazvoka za detekcijo notranjih anomalij v stoječih drevesih : magistrsko delo - (magistrski študij - 2. stopnja) = The use of ultrasound in standing trees to detect Inner anomalies : M. Sc. Thesis - (Master Study Programmes)Krajnc, Luka, gozdarV magistrski nalogi je preučena uporabnost ultrazvoka za zaznavanje notranjih anomalij v stoječih drevesih. V sestoju so bila z ultrazvokom izmerjena drevesa bukve in smreke ter popisane njihove ... zunanje značilnosti. Na licitaciji vrednejših sortimentov so bili z ultrazvokom izmerjeni sortimenti gorskega javorja z in brez rebraste teksture. Preizkušane so bile hitrosti prehoda v 7 smereh ter 2 ravninah. Oblikovanih je bilo 7 novih spremenljivk, izpeljanih iz frekvenčnega spektra, dobljenega s FFT. Prisotnost trohnobe v smreki in rdečega srca v bukvi statistično značilno vplivajo na hitrosti ultrazvoka in analizirane frekvenčne spremenljivke, v obeh primerih prisotnost anomalije zmanjša hitrost ultrazvoka. Verjetnost rdečega srca se povečuje s prsnim premerom in večvrhatostjo. Hitrosti ultrazvoka so neuporabne za napovedovanje rdečega srca v bukvi, vključitev frekvenčnih spremenljivk v binarno logistično regresijo izboljša pravilnost napovedovanja (iz 80 % na 81,8 %). Prisotnost poškodb oboda in zniževanje hitrosti v tangecialnih smereh zmanjša verjetnost prisotnosti trohnobe pri smreki, model pravilno uvrsti 88,5 % analiziranih dreves. Model smo izboljšali z vključitvijo frekvenčnih spremenljivk na 91,5 %. Postopek meritev v sestoju, ki smo ga pohitrili z izključitvijo hitrosti iz modela, pravilno uvršča 87,3 % analiziranih smrek. Med sortimenti gorskega javorja z in brez rebraste teksture so bile odkrite statistično značilne razlike v hitrosti ene izmed smeri in pri več frekvenčnih spremenljivkah.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [L. Krajnc], 2015Language - slovenianCOBISS.SI-ID - 4171686
Author
Krajnc, Luka, gozdar
Other authors
Kadunc, Aleš |
Straže, Aleš
Topics
ultrazvok |
stoječa drevesa |
trohnoba |
rdeče srce |
rebrasta tekstura |
smreka |
bukev |
gorski javor |
ultrasound |
standing tree |
rot |
red heart |
fiddleback figure |
spruce |
beech |
sycamore
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Library | Call number – location, accession no. ... | Copy status |
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BF, Forestry Library, Ljubljana | BFGO Knjižnica MDB 30 IN: 12015000363 |
available - outside loan, loan period: 1 days |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Krajnc, Luka, gozdar | 53233 |
Kadunc, Aleš | 20035 |
Straže, Aleš | 18149 |
Source: Personal bibliographies
and: SICRIS
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