Sökning: "Echo control"

Visar resultat 6 - 10 av 27 avhandlingar innehållade orden Echo control.

  1. 6. Ultrasound Doppler Based In-Line Rheometry - Development, Validation and Application

    Författare :Johan Wiklund; Livsmedelsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknik; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Food and drink technology; Livsmedelsteknik; Technological sciences; non-Newtonian; Chemistry; Kemi; process control; In-line rheometry; Doppler; process monitoring; ultrasound;

    Sammanfattning : The trend within fluid industry is towards continuous production, leading to an increasing demand for new and improved methods that allow real-time monitoring of quality parameters and fast process control. The consistency and viscosity can be described by fluid rheology and are frequently used as quality control parameters. LÄS MER

  3. 7. Low-Complexity Adaptive Filtering for Acoustic Echo Cancellation in Audio Conferencing Systems

    Författare :Christian Schüldt; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : With the globalization of the world’s economy, the demand for effortless, quick and efficient communication is increasing. Modern audio conferencing allows people at different locations to have a conversation as if they were sitting in the same room, without having to travel. LÄS MER

  4. 8. Smoking and pregnancy : with special reference to preterm birth and the feto-placental unit

    Författare :Nina Kyrklund-Blomberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Smoking; Preterm birth; Very preterm birth; Onset of delivery; Placental abruption; Perinatal death; Smoking; Preterm birth; Very preterm birth; Onset of delivery; Placental abruption; Perinatal death; Pulse wave; Vessel stiffness; Echo-tracking system.;

    Sammanfattning : Objective: To study maternal smoking in pregnancy in relation to preterm birth, placental abruption and perinatal mortality in pregnancies with placental abruption, and to pulse wave characteristics in fetal aorta. Methods: Two cohort studies with data on single births obtained from the Swedish Medical Birth Registry (N=311 977 and N=795 459, respectively). LÄS MER

  5. 9. Ultrasonic measurement technology for characterization of pulp fibre suspensions

    Författare :Torbjörn Löfqvist; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

    Sammanfattning : In the papermaking industry, there is a need for sensors to measure the properties of the fibre suspension that determine important parameters in the finished paper. This lack of on-line sensors hampers the development of advanced process control strategies. LÄS MER

  7. 10. Air-coupled microphone measurements of guided waves in concrete plates

    Författare :Henrik Bjurström; Nils Rydén; Björn Birgisson; Tadeusz Stepinski; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Non-destructive testing; Lamb waves; surface waves; air-coupled microphones; non-contact measurements;

    Sammanfattning : Quality control and quality assurance of pavements is today primarily based on core samples. Air void content and pavement thickness are parameters that are evaluated. However, no parameter connected to the stiffness is evaluated. LÄS MER