Abstract: This application discloses a shard adjustment method for a time series database, belongs to the field of data processing technologies. First, feature information of an access request of at least one user for a data table of a time series database is obtained. The data table is divided into a plurality of shard groups according to a predetermined rule, and each shard group can be further divided into a plurality of shards. Each shard group is set in a different time period, and each shard is set in a different node. Then, the predetermined rule is adjusted based on the feature information, and a new shard group and/or a new shard that match/matches the access habit are/is generated according to an adjusted rule.

Abstract: Provided are method and system of calculating cross-section area and included angle of three-dimensional blood vessel branch, comprising: obtaining the contours of a main blood vessel and a branch blood vessel; determining connecting points of the main blood vessel and the branch blood vessel, a three-dimensional branch outer contour, and an initial normal vector of a branch section; determining the position of the branch section at the branch connecting part and an intersecting cross-section of the branch section and the branch outer contour; rotating the three-dimensional branch cross-section contour to obtain an equivalent two-dimensional branch cross-section contour, and calculating the area of the two-dimensional branch cross-section contour; obtaining branch cross-section areas and corresponding normal vectors thereof; and taking the minimum branch cross-section area as the cross-section area of this segment of branch blood vessel, and determining the included angle between the branch blood vessel and t