Sökning: "Bias error"

Visar resultat 1 - 5 av 71 uppsatser innehållade orden Bias error.

  1. 1. Predicting house prices with machine learning methods

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS); KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Isak Engström; Alan Ihre; [2019]
    Nyckelord :;

    Sammanfattning : In this study, the machine learning algorithms k-Nearest-Neighbours regression (k-NN) and Random Forest (RF) regression were used to predict house prices from a set of features in the Ames housing data set. The algorithms were selected from an assessment of previous research and the intent was to compare their relative performance at this task. LÄS MER

  2. 2. Concurrent validity and reliability of a time of-flight camera on measuring muscle’s mechanical properties during sprint running

    Magister-uppsats, Umeå universitet/Avdelningen för idrottsmedicin

    Författare :Sebastian Stattin; [2019]
    Nyckelord :Depth camera; 3D camera; Biomechanics; Acceleration; 1080 sprint;

    Sammanfattning : Recent advancements in 3D data gathering have made it possible to measure the distance to an object at different time stamps through the use of time-of-flight cameras. Therefore, the purpose of this study was to investigate the validity and reliability of a time-of-flight camera on different mechanical sprint properties of the muscle. LÄS MER

  3. 3. Analysis of Accuracy for Engine and Gearbox Sensors

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Institutionen för teknikvetenskaper; Uppsala universitet/Institutionen för teknikvetenskaper

    Författare :Erkan Dogantimur; Daniel Johnsson; [2019]
    Nyckelord :statistical; analysis; engine; gearbox; sensor; sensors; rotation; rotational; speed; differential; pressure; performance; characteristics; trueness; precision; accuracy; Hall; inductive; induction; gauge pressure; reference; hysteresis; bias; noise; linearity; non-linearity; DEWESoft; DAQ; wheel; tooth; teeth; absolute; rotary; encoder; matlab; XOR; Gray; binary; LabView; sampling; measurement; measuring; statistisk; analys; motor; växellåda; sensor; sensorer; rotation; rotationell; hastighet; fart; differentiell; tryck; prestanda; karaktäristik; trueness; precision; accuracy; noggrannhet; onoggrannhet; Hall; induktiv; induktion; tryckskillnad; referens; hysteres; bias; avstånd; brus; linjäritet; linearitet; olinear; olinjär; olinearitet; olinjäritet; DEWESoft; DAQ; sampling; mätning; hjul; tand; tänder; absolut; rotationsgivare; givare; matlab; XOR; Gray; binär; LabView;

    Sammanfattning : This thesis provides a standardized method to measure accuracy for engine and gearbox sensors. Accuracy is defined by ISO 5725, which states that trueness and precision need to be known to provide a metric for accuracy. However, obtaining and processing the data required for this is not straight forward. LÄS MER

  4. 4. Unmanned Aerial Vehicle Positioning Using a Phased Array Radio and GNSS Independent Sensors

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Carl Rapp; [2019]
    Nyckelord :Sensorfusion; Kalman filter; Phased Array Radio; UAV; Positioning;

    Sammanfattning : This thesis studies the possibility to replace the global navigation satellite system (GNSS) with a phased array radio system (PARS) for positioning and navigation of an unmanned aerial vehicle (UAV). With the increase of UAVs in both civilian and military applications, the need for a robust and accurate navigation solution has increased. LÄS MER

  5. 5. The influence of temporal rainfall distribution and storm movement on flood depth in urban pluvial cloud burst modeling

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Michael Henrich; [2019]
    Nyckelord :Pluvial flooding; cloud burst; flood modeling; MIKE 21; temporal distribution; storm movement; areal reduction factors; ARFs; hyetograph; design storm; CDS; Pluviala översvämningar; skyfall; översvämningsmodellering; MIKE 21; regnmönstrets tidsfördelning; molnrörelse; areal reduktion av nederbörd; ARFs; hyetograph; typregn; CDS;

    Sammanfattning : Pluvial floods are the most difficult and to date least investigated phenomena in urban hydrology. While efforts are being made to increase the knowledge base concerning this type of flooding, a large part of the difficulty lies in the nature of the precipitation. LÄS MER