3 results about "Inverse correlation" patented technology

In an embodiment of the present disclosure, a device and method for determining a fetal heart rate and heart rate variability of a pregnant woman and a fetus are contemplated. The method includes generating a spectral transform from a waveform representing a hemodynamic parameter specific to an individual, determining a candidate residual signal contained within an area independent of an excluded area of ​​the spectral transform, identifying a candidate residual signal from the candidate residual signals, comparing the candidate residual signal with a target signal representing an oxygen level present in the individual's bloodstream, the target signal being derived from the hemodynamic parameter, and determining that the candidate residual signal is associated with the heart rate of a fetus located within the individual in response to identifying an inverse correlation between the candidate residual signal and the target signal of the individual.

In embodiments of the present disclosure, a device and method for determining a heart rate of a fetus and a heart rate variability of the pregnant woman and the fetus are contemplated. The method includes generating a spectral transform from a waveform representative of a hemodynamic parameter specific to the individual, determining candidate remnant signals included in an area independent of exclusion areas of the spectral transform, identifying a candidate remnant signal from the candidate remnant signals, comparing the candidate remnant signal with a target signal representative of oxygen levels present in blood stream of the individual, the target signal is derived from the hemodynamic parameter, and determining that the candidate remnant signal is associated with a heart rate of the fetus that is disposed in the individual upon identifying an inverse correlation between the candidate remnant signal and the target signal of the individual.

The invention relates to a human body detection processing method and device. The method comprises the following steps: acquiring perception data in real time; the sensing data comprises a detection state and associated environment parameters; when the obtained sensing data meets the first change feature, executing first-direction dynamic adjustment of the existence judgment window; the existence judgment window represents a continuous state detection time length required for judging whether a human body exists or not; performing human body existence judgment on the detection space based on the adjusted existence judgment window, and executing second-direction dynamic adjustment of the existence judgment window when the obtained sensing data meets a second change feature; wherein the first change feature is different from the second change feature, and at least one of the first change feature and the second change feature is based on collaborative change of a detection state and associated environmental parameters; the first direction and the second direction have reverse relevance.