Abstract: A method and device for predicting a flow capacity of an ecological river channel with vegetation are provided. The method includes: obtaining ecological rive channel geographic data during dry season and ecological zone vegetation data; obtaining a layout strategy of a liquid level sensor group based on ecological zone distribution data and ecological zone vegetation data, the layout strategy of the liquid level sensor group reflects an inundation status of emergent vegetation in the ecological zone by rivers during flood season; obtaining a prediction river flow data at a node location of the ecological zone based on a corrected roughness coefficient of the ecological zone and water level data during the flood season, the node location is a position corresponding to a cross section of the water flow. A directional monitoring for a specific zone is formed with the liquid level sensor group.

Abstract: Provided are a blood flow displaying method, apparatus and device for an ultrasonic system. The method includes: determining a current pulse recurrence frequency of the ultrasonic system, determining a current extraction factor according to the current pulse recurrence frequency and a preset reference pulse recurrence frequency, extracting a target gradation sequence from a preset gradation set according to the current extraction factor, and displaying a blood flow velocity currently detected by the ultrasonic system using a spectrum of the target gradation sequence.