Essays about: "Johan Viklund"

Showing result 1 - 5 of 6 essays containing the words Johan Viklund.

  1. 1. Atmospheric Attenuation for Lidar Systems in Adverse Weather Conditions

    University essay from Umeå universitet/Institutionen för fysik

    Author : Johan Viklund; [2021]
    Keywords : Lidar; Lidar equation; Extinction coefficient; Signal attenuation;

    Abstract : In this study, the weather impact on lidar signals has been researched. A lidar system was placed with a target at approximately 90 m and has together with a weather station collected data for about a year before this study. READ MORE

  3. 2. A proposed decision support tool for wood procurement planning based on stereo-matching of aerial images

    University essay from SLU/Dept. of Forest Resource Management

    Author : Johan Viklund; [2014]
    Keywords : semi-global matching; canopy cover; forest inventory; plot level forest variables; stem volume;

    Abstract : In Sweden the cap portion of the harvested stem volume derives from Non-Industrial Private Forest (NIPF) owners. In the current study a Decision Support Tool (DST) for wood procurement planning based on stereo-matching of aerial images is presented. READ MORE

  4. 3. Modeller för skattning av den vertikala fördelningen av biomassan på klena träd i röjningsgallringar

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Johan Hofmann; Simon Viklund; [2013]
    Keywords : Biomassafunktioner; biomassafördelning; skogsbränsle; konfliktbestånd; biomassauttag;

    Abstract : I samband med nya mål för energiförbrukningen har behovet av förnyelsebara energislag ökat. Ett sätt att möta detta ökade behov i Sverige är ett ökat uttag av skogsbränsle. Denna ökning skulle till stor del kunna bestå av ökat bränsleuttag i skog med hög stamtäthet och klena träd. READ MORE

  5. 4. Continuous Occupancy Mapping Using Gaussian Processes

    University essay from Reglerteknik; Tekniska högskolan

    Author : Johan Wågberg; Emanuel Walldén Viklund; [2012]
    Keywords : gaussian process; regression; classification; mapping; integral kernel;

    Abstract : The topic of this thesis is occupancy mapping for mobile robots, with an emphasis on a novel method for continuous occupancy mapping using Gaussian processes. In the new method, spatial correlation is accounted for in a natural way, and an a priori discretization of the area to be mapped is not necessary as within most other common methods. READ MORE

  6. 5. Identifiering av konfliktbestånd med hjälp av laserskanning

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Gustav Karlefors; Johan Viklund; [2012]
    Keywords : lidar; fusion; skogsbränsle; NNH; area-metoden;

    Abstract : The interest in harvesting wood fuel in conflict stands has grown in recent years as a consequence of the increased demand for biofuel. Conflict stands are young forests that have not been cleaned and have a large number of stems ha-1with a great height and diameter distribution. READ MORE