Sökning: "Astrid Lundgren"

Hittade 4 avhandlingar innehållade orden Astrid Lundgren.

  1. 1. Local and weighted regression. Bias reduction and model validation

    Författare :Astrid Lundgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Nonlinear systems might be estimated, using local linear models. If the estimation data is corrupted by strongly colored noise the local model will have a bias error. In linear system identification the bias error can be reduced by using instrumentalvariable methods. LÄS MER

  3. 2. Weighted Regression with Application to Array Antennas

    Författare :Astrid Lundgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; array antenna; weighted regression; statistical estimation theory; modelling; calibration;

    Sammanfattning : A nonlinear system can be modelled with a simple linear model ifthe model is only valid locally. This can be done by assigningweights to the estimation data, as a function of the distance tothe modelled point. The weighting is here used to develop adirection-dependent calibration method for array antennas. LÄS MER

  4. 3. Utanför gränserna : En vetenskapshistorisk biografi om Astrid Cleve von Euler

    Författare :Kristina Espmark; Christer Nordlund; Bo Sundin; Anders Lundgren; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; History of science; biography; women scientists; diatoms; botany; geology; archaeology; popular science; boundary-work; Astrid Cleve; Hans von Euler-Chelpin; Sweden; History Of Sciences and Ideas; idé- och lärdomshistoria;

    Sammanfattning : This dissertation is a scientific biography of Astrid Cleve von Euler. She was Sweden’s first female Ph.D. graduate in the natural sciences (1898) and pursued a scientific career in spite of formal and cultural limitations. LÄS MER

  5. 4. Solister i mångfalden : signaturerna Bang, Maud och Attis och andra kvinnliga dagspressjournalister med utgångspunkt i 1930-talet

    Författare :Kristina Lundgren; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Periodicals; Journalists; Sweden; Alving; Barbro; 1909-1987; Adlercreutz; Maud; 1907-2000; Ljungström; Astrid; 1905-1987; Kvinnliga journalister; Sverige; 1930-talet; 1940-talet; Idun;

    Sammanfattning : Diss.... LÄS MER