4 results about "Single vessel" patented technology

The invention discloses a multi-objective optimization method for a ship organization scheme, relates to the technical field of ship port entry and exit organization and multi-objective optimization, and aims to solve the problems of single consideration factor, one-sided target and low solving efficiency of an existing method, and the method comprises the following steps: S1, selecting total waiting time TWT, total energy consumption TEC and total economic cost TC of a ship as optimization objectives; respectively giving out three calculation formulas; s2, constructing an optimization model with the minimum three as a target, wherein the model needs to meet the constraints such as the number of ships in a harbor area, the waiting duration of a single ship, the in-harbor duration, the navigation continuity, the time window of going to the harbor and the safety interval of the ships; s3, outputting a Pareto solution set through the steps of initial solution adjustment, constraint verification and the like by adopting a multi-target optimization algorithm fusing NSGA-II and an improved direct search algorithm; and S4, algorithm solution is realized based on MATLAB programming, and a ship organization scheme set is obtained.According to the method, multiple factors can be comprehensively considered, a multi-dimensional optimal scheme is output, and scheduling timeliness and practicability are improved.

The application discloses an anchor chain system storage and transportation and laying ship and a working method thereof. The anchor chain system storage and transportation and laying ship comprises a ship body, a hoisting system and a laying device. The ship body is a double-hull ship body, comprising a piece body and a middle connecting structure. An anchor chain storage and transportation unit is arranged in the middle connecting structure, and an anchor head storage and transportation unit is arranged at the piece body. The two units are arranged in different zones, and an adjustable separation structure is arranged in the anchor chain storage and transportation unit. A connecting working area is arranged on the ship body, a chain outlet mechanism is arranged between the anchor chain storage and transportation unit and the connecting working area, and the hoisting system covers the anchor head storage and transportation unit, a chain outlet position, the connecting working area and the laying device. The anchor chain and the anchor head can be stored and transported in different zones, deck mixed storage and working interference are reduced, and the chain storage adaptability and the continuous laying efficiency of a single ship are improved.

The application relates to a laboratory vessel draining rack, and relates to the technical field of draining racks, which comprises a support assembly, the upper portion of the support assembly is provided with a detachable draining assembly. The application forms a hierarchical flow guide system through the draining assembly, the drainage groove, the flow guide block and the 5-degree-inclined main draining disc and draining holes. The branch flow guide grooves of the radial branch flow guide rods and the stepped annular grooves are suitable for multiple types of vessels such as test tubes and beakers. The quick-release structure of the positioning rod and the positioning hole, combined with the push piece and the extension spring, realizes convenient disassembly and cleaning of the draining assembly. The hinge dust cover of the vertical plate achieves dustproof protection and reduces the pollution risk. The mounting seat of the base is fixed by a reinforcing device to avoid tilting. Compared with the prior art, the application effectively solves the problems of low drainage efficiency, single vessel adaptation, complicated maintenance, insufficient stability and dustproofing loss, and simultaneously improves the draining efficiency, operation convenience and use safety.

The invention relates to a rapid marking method for a coronary CTA blood vessel, computer equipment and a computer program product. The rapid marking method comprises the steps that a coronary three-dimensional model is constructed based on a coronary CTA sequence image, a coronary center line is obtained through extraction based on the coronary three-dimensional model, and a single coronary center line is obtained through extraction according to the coronary center line; straightening and reconstructing a corresponding single blood vessel in the coronary artery three-dimensional model along the central line of the single coronary artery to obtain a straightened single blood vessel model; performing section sampling on the single blood vessel model according to an interception plane passing through the central line of the single coronary artery to obtain a section image; and performing image segmentation on the cross-section image to obtain a coronary vessel edge line, mapping the coronary vessel edge line to the single vessel model, and obtaining the single vessel model marked with coronary vessel boundary information. Compared with a scheme of directly carrying out coronary vessel boundary segmentation on the three-dimensional single vessel model, the method has the advantages that the operation difficulty is reduced, and the computing power cost is saved.