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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Hodnocení harvestorového uzlu vybaveného stříhacím zařízením z hlediska produktivity práce a nákladů

Rajsnerová, Petra January 2011 (has links)
No description available.
2

Metodika pro kalibraci těžebních strojů a analýza výstupů dat dle StandForD / Methods for the calibration of mining machinery and output analysis of data according to Stanford

Kabeš, Antonín January 2015 (has links)
The aim of the thesis is to design and recommend standards for harvester and forwarder operation in selected production conditions and propose the calibration procedure. The determination of production volume will be conducted based on primary data from measuring and control harvester systems and will be verified manually. Harvester data will be collected from *.prd (production - primary production data) and *.stm (stem values - measurements of mean lengths and diameters) files according to the StanForD data format. The proposed calibration method will draw on results of mathematical and statistical error analysis of measuring system reports according StandForD and manual measurements, incorrect procedures made by operators and possibly other factors. The result of this work is to design a calibration procedure of multifunctional machines (harvesters) by the form of operating manuals.
3

Analýza vlivu vlhkostních parametrů půdy na použití mobilních těžebně-dopravních strojů

Pohořalý, Josef January 2010 (has links)
No description available.
4

Zhodnocení využití těžebně dopravních technologií u Arcibiskupských lesů a statků Olomouc s.r.o., polesí Chvalčov

Putala, Martin January 2019 (has links)
This thesis is focused on recommendation of the use of effective and acceptable measures in context with current solution of growing salvage harvesting of timber. The thesis is separated into two parts. The first part leads to the selection of optimal logging technologies in accordance with chosen criteria. The selection criteria are edaphic category, slope inclination, terrain type, age of the area and the representation of woody plants. The priority of the set criteria is the selection of spaces intended for the use of harvester technologies due to the high portion of salvage harvesting of timber. Other commonly used logging technologies are proposed in areas which exclude the use of harvester technologies. In connection to excessive timber harvesting, the second part is focused on the removal of timber from the area of interest with the characterization of the use of paired transport on forest roads. An analysis of timber removal form LHC Chvalčov has been made alongside with a proposal containing minimal parameters for timber storage in connection to the use of paired transport and a map of LHC Chvalčov with marked places indicating timber storages suitable for paired transport.
5

Posouzení provedení prvních probírek dle velikosti použitého harvestoru s dopadem na budoucí růst a potenciální výnos z porostů

Suda, Ondřej January 2017 (has links)
The thesis deals with the appropriateness of using two different combinations of harvester´s system for stand tending. The aim was to quantify differences using harvester´s system and found out which is more appropriate for intervention. The difference in the number of felling trees is using as key parameter. According to results is better for future development of stand using harvester´s which will create closer segmenting lines. The rest of trees in stand mean greater possibility of selection for subsequent thinning and higher possibility of yield in other interventions due to greater volume.
6

Analýza objemových rozdílů při prvotním příjmu surového dříví dle výrobních lokalit a principu měření / Analysis of the volume differences on primary registration of raw timber by production sites and measurement principle

Syrovátková, Hana January 2016 (has links)
The main aim of this thesis was to analyze the differences in the volume of first intake of raw timber, according to production sites and measurement principle. There were compared the volumes of primary documents of income and evidence produced timber called summary for growth - assortments and volumes of prin-ted output, based on a production-registration software harvester. In the data pro-cessing was discovered major factor in emergence of differences, for which had to be revised methodology for data evaluation. Due to production indiscipline of the forwarders operator was not possible to assess the volume differences according to the Forest stand groups, but had to be chosen method of data assessment ac-cording to production units. Another factor contributing to the emergence of vo-lume differences was harvester operator. The operator didn´t carry out regular kalibrati-on of harvester measuring system and during entering into production-registration software showed substantial insubordination. In operation, authorities also failed production control of all participants of comprehensive contract. It was especially control of technological procedures. All measured values showed significant differences in the volume. Condition of LCR, claiming differences +- 2% and it meets only 11% of them. There was evaluated the total differences, followed by trees and various assortments. The resulting differences could influence conversi-on coefficient, which was same for all of the assortments of coniferous trees, which certainly doesn´t reflect their quality.
7

Zjištění objemu hráně rovnaného dříví pomocí počítačové analýzy obrazu a jeho verifikace

Zbytovský, Ondřej January 2011 (has links)
No description available.
8

Měření a kubírování dříví harvestory v porovnání s manuálními postupy

Bauer, Jan January 2018 (has links)
The diploma thesis is focused on comparison between timber measurement and log volume determination by harvesters and manual methods. The issues of measurement by harvesters is calibration of measuring system and principle of measurement, searching of source of mistakes and influeancing. In field conditions on property of Lesní správa Bruntál, LČR s.p. was performed an analysis of measurement with a difference between harvester and manual measuring from 1,14 % to 3,20 %. The measurement was realized in a random bark beetle extraction. Harvesting was performed by harvestor Timberjack 1270 D equipped with TimbermaticTM 300 system.
9

Využití odkorňovací hlavice harvestoru v podmínkách kůrovcové kalamity

Mergl, Václav January 2019 (has links)
The aim of this thesis was to describe the use of debarking head of one grip harvester in the salvage logging. For this purpose, a time study was chosen in which debarking heads with usual tools were compared with debarking heads with debarking sets on five research plots with two machines. The manufacturing process was divided into several operations, which were evaluated separately. Specifically, it was divided into operations: searching, felling, fall of the tree, manipulation, delimbing, and ascertainment. In the next step the quality of debarking was observed, depending on the moisture and on the diameter of logs. Debarking heads were measured during the growing season. It was discovered that the debarking head with debarking set needed twice as much time to process the whole tree as a head with usual tools. Delimbing contributes more than half to this difference. Furthermore, it was discovered that debarking quality does not dependent on the log's moisture at the time of harvest but on the hydraulic pressure of knives and feed rollers. Considering dimensions, the central parts of logs were debarked the best. Following these evaluations, recommendations were made for the practice of using machinery with debarking heads and improving debarking quality.
10

Posouzení vhodnosti použití harvestorové technologie lesní těžby na ŠLP Křtiny

Sysel, Jan January 2015 (has links)
This thesis is focused on assessing the suitability of using harvesting technology in conditions of Training Forest Enterprise Masaryk Forest Křtiny (TFE). The work is related to the overall characteristics of harvester technologies in terms of technical solutions, but also to establish criteria of suitable natural conditions for the most thrifty deployment. The findings obtained in this investigation are applied to the forests of the property to discover the potential using options of harvester technologies. Criteria to determine the suitability of the forest stand were: type of terrain, edaphic category, minimum representation of conifers and age of stand. For forest stands there are assigned the appropriate types of harvester chassis and harvester heads which are suitable for their cutting. In the thesis there are further processed optimal harvester nodes, a comparing of the time consumption to processing of the volume of logging by classical logging technologies and harvester technologies. Based on the findings there was elaborated a recommendation for operating practices.

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