Papers by Keyword: Pulse Pressure (PP)

Abstract: Arterial stiffness is a very important physical parameter and the measurement to it is very important in clinic. This paper describes the principle and arithmetic of arterial stiffness index. The measuring algorithm based on oscillometric method is also discussed. The algorithm proves effective and reliable through the analysis of many cases and doing lots of clinical tests, it has been developed software under LabVIEW7.0 and applied in the hospital. Furthermore, it can give the information of the measurer’s arterial stiffness and provide reference to doctor to determine the measurer’s cirrhosis level.

Abstract: Basing on the theory of power flow, frequency response analysis was acted on in a hydropower house under dominant frequency with measured data of Three Gorges Station in spiral case and draft tube. Power flow in walls was calculated by APDL procedure and the properties were analyzed. The conclusion is that longitudinal wave is the main method in walls of the powerhouse, energy is reflected and stacked at the top of the walls. Displacement along the river changes and power flow in walls decays obviously. Intensity of vibration origin and distance between the vibration and the wall are both the influencing factors，increasing the stiffness of buttressed walls takes the role of limiting flexural wave and shear wave effect