Sökning: "shape parameter"

Visar resultat 1 - 5 av 83 uppsatser innehållade orden shape parameter.

  1. 1. Far-field pattern synthesis of transmitarray antennas using convex optimization techniques

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Marie Defives; [2022]
    Nyckelord :Applied physics; Transmitarray antennas; convex optimization; Tillämpad fysik; Transmitarray-antenner; konvex optimering;

    Sammanfattning : Transmitarrays antennas (TAs) can be seen as the planar counterpart of optical lenses. They are composed of thin radiating elements (unit cells) which introduce different local phase shifts on an incident electromagnetic wave, emitted by a primary source, and re-radiate it. LÄS MER

  2. 2. Variabelt sättavstånd i potatis : för att få jämnare storlek på potatisen

    Kandidat-uppsats, SLU/Department of Biosystems and Technology (from 130101)

    Författare :Daniel Ekblad; Oskar Lundgren; [2021]
    Nyckelord :potatis; precisionsodling; variabelt sättavstånd; knölsättning; storleksfördelning på potatis; teknik; odlingsteknik;

    Sammanfattning : Potatisen var ett viktigt livsmedel förr men har på senare tid minskat i betydelse då det finns fler näringsrika råvaror att hitta i affären. Kraven har ökat på hur potatisen ska se ut i affären. Det ställer höga krav på lantbrukaren att kunna odla och leverera en fin potatis till detaljhandeln. LÄS MER

  3. 3. Primordial Gravitational Waves and ultra-light Dark Matter in a complex singlet extended Standard Model

    Kandidat-uppsats, Lunds universitet/Partikelfysik; Lunds universitet/Teoretisk partikelfysik

    Författare :Sara Wildenor; [2021]
    Nyckelord :theoretical physics; gravitational waves; dark matter; complex singlet extended standard model; LISA; BBO; DECIGO; Physics and Astronomy;

    Sammanfattning : In this thesis, the consequences of extending the internal symmetries of the standard model with a complex singlet scalar field, are investigated in terms of dark matter phenomenology and the possibility of primordial gravitational wave detection utilizing space based laser interferometry. The scalar potential of the model is constructed with a Z2 symmetry, which allows for the retainment of a linear and a quadratic coupling parameter, as well as a stable dark matter candidate, and an additional non-zero vacuum expectation value for the real component of the scalar field. LÄS MER

  4. 4. Comparative study of the static andquasi-static compliance measurementprocedures on machine tools

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Athina Magoulidou; Gegerile Gegerile; [2021]
    Nyckelord :static; quasi-static; stiffness; loaded double ball bar LDBB ; circular test; machine tool loaded testing; statisk; kvasi-statisk; styvhet; laddad dubbelkulstång LDBB ; cirkulärt test; testad med maskinverktyg;

    Sammanfattning : There is an increasing trend in manufacturing industry for producing complex and delicate parts. As a result, the importance of having a deeper understanding of machine systems, in order toget higher accuracy of machined parts, arises. This leads to an increasing demand of testingmachine accuracy under operational condition. LÄS MER

  5. 5. The Effect of Gravitational Encounters on Binary Planetesimals

    Master-uppsats, Lunds universitet/Astronomi

    Författare :John Gillan; [2021]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Binary planetesimals in the Kuiper belt can experience close encounters with other bodies. These encounters can disturb the orbital dynamics of the binary in several ways. Energy can be added to the system by the impactor body and lead to the disruption of the binary. LÄS MER