Sökning: "Lead Time Variability"

Visar resultat 16 - 20 av 41 uppsatser innehållade orden Lead Time Variability.

  1. 16. Detection and location of HVDC commutation faults from PMU data

    Master-uppsats, Lunds universitet/Industriell elektroteknik och automation

    Författare :Alejandro Belinchon Calderon; [2018]
    Nyckelord :HVDC-links; HVDC converters; Commutation failures; Phasor measurement units PMUs ; Electric power systems; Wide Area Measurement systems WAMS ; Standard IEEEC 37.118; Single-line to ground faults; Three-Phase faults; Fault detection and location; Nordic 32; DigSilent-PowerFactory; PSCAD; MATLAB-Simulink; Symmetrical components.; Technology and Engineering;

    Sammanfattning : Commutation Failures in LCC HVDC converters is a topic that is normally addressed from the component perspective, looking at converters’ internal signals. How these commutation failures affect the outer AC network is not deeply understood yet. LÄS MER

  3. 17. Effektivisering av process för utlastning : Identifiering av störningar och förbättringsförslag för en miljö med hög variation

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Industriell teknik

    Författare :Roxana Talebi; Linnea Österlund; [2018]
    Nyckelord :;

    Sammanfattning : En process som hanterar ett system där variationen är hög kan vara svår att kontrollera vilket leder till uppkomsten av processtörningar. Störningarna reducerar processens potentiella kapacitet och ger upphov till tidsförluster. LÄS MER

  4. 18. Forming an Inventory Control Policy in a Stochastic Environment: A Case Study at Sandvik Crushing and Screening

    M1-uppsats, Lunds universitet/Produktionsekonomi

    Författare :Anders Mattisson; David Alsmarker; [2018]
    Nyckelord :Inventory Control; Stochastic Lead Time; Stochastic Demand; Input Analysis; Optimization; Technology and Engineering;

    Sammanfattning : Background: For most companies that handle large material flows there are buffers between different stages in the supply chain, often referred to as inventory. The main reasons for having these inventories are to achieve economies of scale when handling material flows and to buffer against uncertainties when matching demand and supply. LÄS MER

  5. 19. Analysis of the Hard Spectrum BL Lac Source 1H 1914-194 with Fermi-LAT Data and Multiwavelength Modelling

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Författare :Dominic Gächter Sundbäck; [2018]
    Nyckelord :;

    Sammanfattning : The very-high-energy gamma-ray emission of the hard spectrum BL Lac source 1H1914-194 has been studied with Fermi-LAT data covering a nearly ten-year period between August 2008 until March 2018 in the energy range of 300 MeV to 870 GeV. The mean flux has been determined as 8.4 x 10-9±3.5 x 10-10 photon cm-2 s-1. LÄS MER

  7. 20. Variability and regulation of the planktonic respiratory quotient in a eutrophic lake (Lake Vombsjön) in summer 2016

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Karla Münzner; [2017]
    Nyckelord :Physical geography and ecosystem analysis; biogeochemistry; bacterioplankton respiration; eutrophic lake; carbon cycling; Lake Vombsjön; Earth and Environmental Sciences;

    Sammanfattning : Bacterial respiration and biomass growth are important processes for carbon cycling in freshwater ecosystems and bacterial respiration is often quantified from measured O2 concentrations by using a respiratory quotient (RQ=O2 consumed to produce CO2, in moles) of 1. Recent studies have shown, however, that RQs can vary a lot in different aquatic ecosystems (0. LÄS MER