Sökning: "forest machine"

Visar resultat 1 - 5 av 33 avhandlingar innehållade orden forest machine.

  1. 1. Random Forest for Histogram Data An application in data-driven prognostic models for heavy-duty trucks

    Detta är en avhandling från Stockholm : Department of Computer and Systems Sciences, Stockholm University

    Författare :Ram Bahadur Gurung; Henrik Boström; Tony Lindgren; Niklas Lavesson; [2020]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Histogram data; random forest; NOx sensor failure; random forest interpretation; data- och systemvetenskap; Computer and Systems Sciences;

    Sammanfattning : Data mining and machine learning algorithms are trained on large datasets to find useful hidden patterns. These patterns can help to gain new insights and make accurate predictions. Usually, the training data is structured in a tabular format, where the rows represent the training instances and the columns represent the features of these instances. LÄS MER

  2. 2. Human factors in mechanized cut-to-length forest operations

    Detta är en avhandling från ; Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences

    Författare :Carola Häggström; Sveriges lantbruksuniversitet.; [2015]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Although forest operations research has a more than 50-year-long tradition in the field of human factors, there is a current decline in resources put on continuous and systematic human factors research. Therefore, the overall aim of this thesis was to contribute new knowledge on working conditions in mechanized cut-to-length logging operations and their relationship to system performance. LÄS MER

  3. 3. Forestry machine and soil interaction for sustainable forestry

    Detta är en avhandling från ; Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences

    Författare :Abdurasul Pirnazarov; Ulf Sellgren; Kjell Andersson; Sally Shoop; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CTL-logging; forestry machine; forwarder; multi-body simulations; roots; terramechanics; wheel-soil interaction; WES model; Machine Design; Maskinkonstruktion;

    Sammanfattning : More than 50 percent of the land area of the Nordic countries Finland, Norway, and Sweden are covered by dense forests and they are among the most important producers of forest products in the world. Forestry in these countries is based on sustainable management principles – reforestation follows harvesting. LÄS MER

  4. 4. Automation in forestry development of unmanned forwarders

    Detta är en avhandling från Umeå : Institutionen för datavetenskap, Umeå Universitet

    Författare :Ola Ringdahl; Thomas Hellström; Tomas Nordfjell; Arto Visala; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TECHNOLOGY Information technology Computer science; TEKNIKVETENSKAP Informationsteknik Datavetenskap; FORESTRY; AGRICULTURAL SCIENCES and LANDSCAPE PLANNING Area technology Forest engineering; SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING Areell teknik Skogsteknik; computer and systems sciences; data- och systemvetenskap;

    Sammanfattning : For the last 50 year, forestry operations have become more and more mechanized. In modern forestry in Europe two machines are typically used; a harvester that fells, debranches and cross-cuts the trees into logs and a forwarder that transports them to the nearest road. LÄS MER

  5. 5. Semi-Automating Forestry Machines Motion Planning, System Integration, and Human-Machine Interaction

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Simon Westerberg; Anton S. Shiriaev; Klas Nilsson; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forestry Robotics; Forest Machine Automation; Trajectory Planning; Hydraulic Manipulators; Teleoperation; Virtual Environments; Interaction Methods; Head Tracking;

    Sammanfattning : The process of forest harvesting is highly mechanized in most industrialized countries, with felling and processing of trees performed by technologically advanced forestry machines. However, the maneuvering of the vehicles through the forest as well as the control of the on-board hydraulic boom crane is currently performed through continuous manual operation. LÄS MER