Sökning: "Nils Holmström"

Hittade 3 avhandlingar innehållade orden Nils Holmström.

  1. 1. Optimal pacing with and implantable pO2 sensor

    Författare :Nils Holmström; KTH; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : A goal in modern pacemaker technology is to adapt the timing of stimulation to the metabolic demand and to optimize the hemodynamics of the diseased heart. Because the plasma concentration of mixed venous oxygen is a good indicator of workload and circulation, we developed an implantable coulometric blood oxygen sensor to improve the rate adaptation. LÄS MER

  3. 2. Algorithms for Costly Global Optimization

    Författare :Nils-Hassan Quttineh; Kenneth Holmström; Hans Bruun Nielsen; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optimization; systems theory; Optimeringslära; systemteori; Mathematics Applied Mathematics; Matematik tillämpad matematik;

    Sammanfattning : There exists many applications with so-called costly problems, which means that the objective function you want to maximize or minimize cannot be described using standard functions and expressions. Instead one considers these objective functions as ``black box'' where the parameter values are sent in and a function value is returned. LÄS MER

  4. 3. The interaction between microbes, siderophores and minerals in podzol soil

    Författare :Engy Ahmed; Sara Holmström; Volker Brüchert; Nils Holm; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydroxamates; Siderophore; Podzol; Microorganisms;

    Sammanfattning : .... LÄS MER