Sökning: "track circuit"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden track circuit.

  1. 1. Track circuits’ robustness Modeling, measurement and simulation

    Författare :Emilio Rodriguez; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Track circuit; Relay; False positive signals; Signalling in railway; Modelling; Simulation; Testing; Robustness; Interoperability; Reliability; Railway Infrastructure; Technology - Electrical engineering; electronics and photonics; Information technology - Telecommunication; Information technology - Computer engineering; Technology - Engineering physics; Information technology - Systems engineering; Teknikvetenskap - Elektroteknik; elektronik och fotonik; Informationsteknik - Telekommunikation; Informationsteknik - Datorteknik; Teknikvetenskap - Teknisk fysik; Informationsteknik - Systemteknik; Drift och underhållsteknik; Operation and Maintenance;

    Sammanfattning : In countries with rough weather conditions, frequent delays cause railway companies to waste time and money. Many of these delays are related to the train detection systems, as the old DC track circuits are still used in some countries, including Sweden, our case study. LÄS MER

  2. 2. High Aspect Ratio Microstructures in Flexible Printed Circuit Boards Process and Applications

    Författare :Hanna Yousef; Klas Hjort; Mikael Lindeberg; Peter Leisner; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; flexible printed circuit boards; polyimide; through-hole vias; ion track technology; thermoelectricity; thermopiles; substrate integrated waveguides; millimeter wave devices; Teknisk fysik; TECHNOLOGY Engineering physics; TEKNIKVETENSKAP Teknisk fysik;

    Sammanfattning : Flexible printed circuit boards (flex PCBs) are used in a wide range of electronic devices today due to their light weight, bendability, extensive wiring possibilities, and low-cost manufacturing techniques. The general trend in the flex PCB industry is further miniaturization alongside increasing functionality per device and reduced costs. LÄS MER

  3. 3. Harmonic Mitigation in Traction Drives

    Detta är en avhandling från Department of Industrial Electrical Engineering and Automation, Lund Institute of Technology

    Författare :Hans Bängtsson; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydraulics; Mechanical engineering; converter; line interference; track circuit; Railway signalling system; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Sammanfattning : In railway traffic the low friction between wheel and rail causes long braking distances, normally much longer than the sight distance of the driver, i.e. if the driver starts the braking when a problem on the track is discovered, it might be too late to brake the train. Therefore, safe railway traffic can not only rely on the driver. LÄS MER

  4. 4. Heterogeneous Technologies for Microfluidic Systems

    Detta är en avhandling från Uppsala : acta universitatis upsaliensis

    Författare :Gunjana Sharma; Klas Hjort; Sami Franssila; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; actuator; biosensor; fluidic circuit board; heterogeneous technology; ion track; microfluidic; pump; stainless steel; super-hydrophobic; valve; Viton; TECHNOLOGY; TEKNIKVETENSKAP; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

    Sammanfattning : In this thesis, conventional and unconventional technologies have been studied and combined in order to make heterogeneous microfluidics with potential advantages, especially in biological applications. Many conventional materials, like silicon, glass, thermoplastic polymers, polyimide and polydimethylsiloxane (PDMS) have been combined in building heterogeneous microfluidic devices or demonstrators. LÄS MER

  5. 5. Sequential 3D Integration - Design Methodologies and Circuit Techniques

    Detta är en avhandling från Uppsala : acta universitatis upsaliensis

    Författare :Panagiotis Chaourani; Ana Rusu; Saul Rodriguez; Per-Erik Hellström; Georges Gielen; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sequential 3D integration; monolithic inter-tier vias; design platforms; parasitic extraction flows; RF AMS circuits; inductors; heterogeneous integration; germanium transistors; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : Sequential 3D (S3D) integration has been identified as a potential candidate for area efficient ICs. It entails the sequential processing of tiers of devices, one on top the other. LÄS MER