Sökning: "system L"

Visar resultat 21 - 25 av 693 avhandlingar innehållade orden system L.

1. 21. Efficient parallell architectures for future radar signal processing

   Författare :Anders Åhlander; John L. Gustafson; Högskolan i Halmstad; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Computer architecture; radar signal processing; space-time adaptive processing; synthetic aperture radar; parallel processing; engineering efficiency; Computer science; Datalogi;

   Sammanfattning : The processing demands on future embedded radar signal processors may stretch to several trillions of floating-point operations per second (TFLOPS). This is an increase of two to three orders of magnitude realtive to the requirements of today. Still, the tight size and power constraints are unchanged. LÄS MER

3. 22. A Novel Signal Model and Estimation Method for Acoustic Doppler Current Meters

   Författare :Thomas L Lagö; Teknisk akustik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Doppler Profiler; Acoustic Doppler; Gaussian Backscattering Model; ADCM; ADCP; The Symmiktos Method; Estimation; Doppler; Current; MPCA.; Technological sciences; Teknik; Electromagnetism; optics; acoustics; Elektromagnetism; optik; akustik;

   Sammanfattning : This thesis deals with the process of estimating underwater current from the backscattering signal transmitted from an ultrasonic transducer. The narrowband sinusoidal burst signal is Doppler-shifted due to the current, and this information is converted into current. LÄS MER

4. 23. NK cells and missing self recognition : genetic control, mhc class i dependent education and potential use in cancer therapy

   Författare :Stina L Wickström; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : NK cells belong to the innate immune system and are important in the defense against virus infections and malignant cells. They mediate their effector functions via release of cytotoxic granules and by cytokine production which can influence the status of other (immune) cells. LÄS MER

5. 24. Anthropogenic influence on climate through changes in aerosol emissions from air pollution and land use change

   Författare :Juan Camilo Acosta Navarro; Ilona Riipinen; Annica M.L. Ekman; Hans-Christen Hansson; Risto Makkonen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Climate change; Air quality; Land use; General circulation; Atmosphere-Ocean interactions; Aerosol climate effects; Earth system modelling; Applied Environmental Science; tillämpad miljövetenskap;

   Sammanfattning : Particulate matter suspended in air (i.e. aerosol particles) exerts a substantial influence on the climate of our planet and is responsible for causing severe public health problems in many regions across the globe. LÄS MER

7. 25. Health effects of heatwaves : short and long term predictions

   Författare :Christofer Åström; Bertil Forsberg; Kristie L. Ebi; Scott Sheridan; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heatwave; health impact assessment; early warning system; mortality; morbidity; climate change;

   Sammanfattning : Background: Climate change is defined by the Intergovernmental Panel on Climate Change as changes in the state of the climate associated with changes in the mean and/or the variability of its properties. Climate change will affect temperatures both as an increase in mean temperature as well as changes in the frequency of temperature extremes. LÄS MER