44 results about "Crack spread" patented technology

The invention relates to a lining crack identification method based on automatic image search, which mainly solves the technical problem that the existing identification method is influenced by factors such as finer cracks, more background interferences, poor crack continuity and the like, and comprises the following steps: S1, selecting an image containing cracks, and preprocessing the image; S2,selecting a starting point and an end point of the crack, and calculating an angle between the two points; S3, selecting a small area image by taking the starting point as a central coordinate, and performing scaling at different scales; S4, calculating CTA values of the images under different scales, and obtaining crack regions in the original small images by utilizing inter-scale association; S5, carrying out skeleton extraction on the crack area, obtaining a next image search center position, and searching towards a crack end point position; and S6, connecting the crack skeletons searchedfor multiple times to obtain complete crack coordinate information. According to the invention, the crack position information can be accurately and quickly acquired.

The invention belongs to the technical field of rail transit, and particularly relates to an efficient and fast metro crack trunk extraction algorithm and system based on computation geometry. According to the efficient and fast metro crack trunk extraction algorithm and system based on the computation geometry, a machine identifies connected cracks, and an empty queue Cn to be visited and an empty storage space Cxy are defined firstly; a convex polygon is constructed at the crack area through calculation according to horizontal coordinates and vertical coordinates of all crack pixel points obtained from the last step through calculation, wherein the convex polygon is formed by a crack pixel point set; a crack trunk is marked by a rectangular frame, the truck area of the cracks is identified based on the convex polygon obtained from the first two steps, and corresponding areas are marked by matching rectangular frames. The efficient and fast metro crack trunk extraction algorithm and system based on the computation geometry have the advantages that the advantages of automatic detection and the advantages of manual detection are combined, the manual workload is reduced greatly, and accuracy is guaranteed. The efficient and fast metro crack trunk extraction algorithm and system based on the computation geometry are worth using.

The invention discloses an advancing waterstop sedimentation post-cast strip of a foundation slab. The advancing waterstop sedimentation post-cast strip of the foundation slab is characterized in that an advancing waterstop water-proof construction member is of an integral structure, a right angle type expansion joint is formed between the advancing waterstop water-proof construction member and the foundation slab, two side surfaces of the expansion joint are provided with steel moulding plates with reserved reinforcing steel bar holes; the horizontal extension joint is hollow, and the vertical extension joint is filled with waterstop caulking objects; the junctions of the extension joints and a foundation bed are provided with stainless steel waterstop strips; the junction of the advancing waterstop water-proof construction member and the post-cast strip is poured with a cement mortar screeding layer which is coated with flexible water-proof paint. The sedimentation post-cast strip has the advantages that the extension joints are changed into two right angle extension joints from a single vertical extension joint, so that a water permeation route is long; the advancing waterstop water-proof construction member has the advantages of small crack spreading range and good differential settlement control effect; the stainless steel waterstop strips can carry out tensile deformation along with sedimentation and have a corrosion resistant function; the downstream face resists water by using the flexible water-proof paint, the problem of water-proof invalidation caused by that a flexible water-proof layer of the downstream face can be easily peeled off can be solved; the steel moulding plates with the reserved reinforcing steel bar holes are used as dismounting-free moulding plates, and construction progress and quality can be improved.

The present invention provides a method for increasing the yield or conversion of light olefins to increase the hydrocarbon component from a hydrocarbon feed to a gasoline blending cell. The process includes separating the naphtha feed into components in a first stream that are more easily processed in a cracking unit and components in a second stream that are more easily processed in a reforming unit. The process includes the ability to convert components from the cracked stream to the reformed stream and convert components from the reformed stream to the cracked stream.