Sökning: "impedans"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet impedans.

  1. 1. Mathematical Models for Investigation of Performance, Safety, and Aging in Lithium-Ion Batteries

    Författare :Tommy Georgios Zavalis; Göran Lindbergh; Mårten Behm; Yann Bultel; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lithium-ion battery; modeling; electrochemical processes; impedance; polarization; performance; safety; aging; power optimized battery; litiumjonbatteri; modellering; elektrokemiska processer; impedans; polarisation; prestanda; säkerhet; åldring; effektoptimerat batteri;

    Sammanfattning : Rechargeable lithium-ion batteries have both the power and energy capabilities to be utilized in hybrid electric vehicles and other power demanding applications. However, there are obstacles primarily related to reliability in safety and lifetime. Additionally, there is still room for improvement in the battery performance. LÄS MER

  3. 2. Prediction and experimental validation of dynamic soil-structure interaction of an end-bearing pile foundation in soft clay

    Författare :Freddie Theland; Jean-Marc Battini; Amir Kaynia; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dynamic soil-structure interaction; Pile group; End-bearing piles; Dynamic impedance; Environmental vibration; Experimental validation; Dynamisk jord-struktur-interaktion; Pålgrupp; Spetsbärande pålar; Dynamisk impedans; Omgivningsvibrationer; Experimentell validering; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Sammanfattning : In the built environment, human activities such as railway and road traffic, constructionworks or industrial manufacturing can give rise to ground borne vibrations. Such vibrations become a concern in urban areas as they can cause human discomfort or disruption of vibration sensitive equipment in buildings. LÄS MER

  4. 3. Transtorakal impedans, med särskild hänsyn till det nyfödda barnet : tekniska aspekter

    Författare :Torsten Olsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER

  5. 4. Lithium-ion battery models for performance and aging

    Författare :Jing Ying Ko; Göran Lindbergh; Ulrike Krewer; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lithium-ion batteries; pseudo two-dimensional model; model extension; parametrization; aging; lifetime; Chemical Engineering; Kemiteknik;

    Sammanfattning : The demand for lithium-ion batteries (LiBs) is increasing at an exponential rate, so is the need to understand their behaviors and properties.In this pursuit, models are useful tools for improving cell design,quality, control system, keeping track of performance, aging andlifetime. LÄS MER

  7. 5. Impedance and Instabilities in the MAX IV 3 GeV Ring

    Författare :Galina Skripka; Lunds universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Collective effects; geometric impedance; resistive wall impedance; wakefields; particle tracking; harmonic cavity;

    Sammanfattning : To ensure the beam with an ultralow emittance and high current the possible effects deteriorating the beam stability must be investigated. When ultrarelativistic particles travel in the vacuum chamber they induce electromagnetic fields which can act back on them and the following particles. LÄS MER