| http://www.w3.org/ns/prov#value | - an and systolic blood pressure provided by said calibration device as said calibration signal, according to a piecewise-linear formula Vel1(t)=a1+b1P 1!(t), where a1 is an offset variable and b1 is a slope variable, and according to a second piecewise-linear formula Vel2(t)=a2+b2P 2!(t), where a2 is an offset variable and b2 is a slope variable; and processing said calibration signal and said noni
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