Abstract: Provided are an image acquisition method, an imaging system, calibration equipment and a storage medium. The image acquisition method includes: acquiring a projection image formed by an imaging beam passing through a barrier array plate; acquiring scattered sampling points corresponding to the barrier posts in the projection image; interpolating a vacancy between every adjacent scattered sampling points to obtain interpolated sampling points; and acquiring a scattering distribution map corresponding to the projection image based on the scattered signals of the scattered sampling points and of the interpolated sampling points.

Abstract: Provided is a method for determining tube electrical parameters. The method includes: acquiring target projection data of an imaging device in scanning a target object at a first scan angle; acquiring target noise data corresponding to the target object; determining current noise data corresponding to the target projection data; and determining, based on the target noise data and the current noise data, the tube electrical parameters of the imaging device in scanning the target object at a second scan angle.

Abstract: It is disclosed a method for controlling the protection switching in a communication network having a ring topology. The method applies when a lockout of protection command is applied at a node, a bidirectional failure occurs on a span connecting the node to an adjacent node, and the lockout of protection command is subsequently removed. The method comprises, at any one of the node and the adjacent node, detecting the failure and, if there is not a further lockout of protection command locally applied at the any one of the node and the adjacent node, sending a request packet carrying a signal fail indication towards the other node.

Abstract: The present invention relates to a regulating valve for regulating and automatically controlling a fluid for a constant flow, comprising a valve body, a valve stem in the body, a pressure difference transducer, a first clack, and a second clack whose main body is a sleeve. At the outside of the sleeve are provided two concentric projects and guiding ribs perpendicular to the projects. The invention, compared to the prior art, has advantages of good performance and reliability, simple and compact structure. The regulating valve according to the invention can automatically regulated with an electric actuator or a pneumatic actuator.