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VMS stationary gill net fishing vessel net number extraction method based on DBSCAN

A technology of setting gillnets and extracting methods, which is applied to instruments, character and pattern recognition, computer components, etc., can solve problems such as methods that have not yet appeared, and achieve high accuracy

Active Publication Date: 2019-02-26
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI +1
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Problems solved by technology

Net time is an important statistical parameter in the calculation of fishing effort, fishery resources investigation, and fishery production management. At present, most methods for extracting net times of fixed gillnets are statistical analysis based on heading and speed characteristics, while clustering is based on location information. A method to identify net times has not yet emerged

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  • VMS stationary gill net fishing vessel net number extraction method based on DBSCAN
  • VMS stationary gill net fishing vessel net number extraction method based on DBSCAN
  • VMS stationary gill net fishing vessel net number extraction method based on DBSCAN

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Embodiment Construction

[0022] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0023] The embodiment of the present invention relates to a DBSCAN-based method for extracting net times of VMS fixed gillnet fishing boats, including the following steps: counting the frequency of the instant speed reported by each point, judging the net collection and release status of fixed gillnet fishing, and extracting Ship position data in the net state; use the return time to get the time interval threshold between...

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Abstract

The invention relates to a VMS stationary gill net fishing vessel net number extraction method based on DBSCAN, which comprises the following steps: counting the frequency of the instant speed reported by each point, judging the net harvesting and net releasing states of the stationary gill net fishing, and extracting the ship position data under the net harvesting state; obtaining the net frequency time interval threshold by using report return time, and according to the speed of each point and the time interval between the nets, calculating the clustering parameters, and introducing the DBSCAN algorithm for judging net frequency of fixed gill net. The distance of each point in the net is calculated in turn, and the length of each net is extracted. The invention can calculate the number of fishing net times of the fixed gill net fishing vessel and obtain the net lengths of each net time.

Description

technical field [0001] The invention relates to the technical field of fishing vessel position data mining, in particular to a DBSCAN-based method for extracting net times of a VMS fixed gillnet fishing vessel. Background technique [0002] Vessel Monitoring System (VMS, Vessel Monitoring System) can provide time, location and dynamic information of fishing boats. At present, my country's fishing boats are equipped with automatic ship identification equipment (AIS), Beidou satellite ship position monitoring system, and CDMA public mobile communication equipment. Real-time contact and tracking monitoring of ship position. Among them, the time resolution of the longitude and latitude ship position data transmitted by the Beidou satellite is recorded every 3 minutes, and the spatial resolution is about 10 meters. Net time is an important statistical parameter in the calculation of fishing effort, fishery resources investigation, and fishery production management. At present, mo...

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/23
Inventor 张胜茂原作辉邹国华王斐杨胜龙伍玉梅崔雪森戴阳吴祖立张衡汤先峰
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI