Sökning: "David Sánchez"

Hittade 3 uppsatser innehållade orden David Sánchez.

  1. 1. Comparison of ballasted and ballastless bridges for high speed trains

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :David Matos Sánchez; Maša Nikolic; [2016]
    Nyckelord :High-speed train; concrete bridge; beam bridge; dynamic; 3D dynamic;

    Sammanfattning : The purpose of the project is to investigate the difference in performance between ballasted and ballastless railway bridges dedicated to high speed trains by taking into account both static and dynamic requirements. The main questions are: a) whether choosing a ballastless bridge results in a more slender section due to the lower self-weight b) if the design of bridges for high speed trains is governed by the static or by the dynamic requirements. LÄS MER

  3. 2. Robot Positioning System : Underwater Ultrasonic Measurement

    Magister-uppsats, Akademin för innovation, design och teknik

    Författare :David Salido Monzú; Oliver Roldán Sánchez; [2009]
    Nyckelord :ultrasound; ultrasonic; robot; positioning; sensor; underwater; ultrasonido; robot; posicionamiento; sensor; sumergido; agua;

    Sammanfattning : This document provides a description about how the problem of the detection of thecenter of a defined geometry object was solved.This named object has been placed in an experimental environment surrounded bywater to be explored using microwaves under the water, to try to find a possibletumor. LÄS MER

  4. 3. Near-field evolution and mixing of a negatively buoyant jet consisting of brine from a desalination plant

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :David Sánchez; [2009]
    Nyckelord :desalination plants; avsaltningsanläggning; vattenrening; salinitet; saline water; discharged water; Technology and Engineering; Earth and Environmental Sciences;

    Sammanfattning : The aim of this study was to investigate the behavior of a dense jet discharged into lighter ambient water. This situation can be found for brine water discharged from desalination plants. Desalination plants discharge heavier brine water, generated in the process of manufacturing fresh water, to the receiving water, usually the sea. LÄS MER