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Billiard aiming method and special billiard aiming device

The invention relates to a billiard aiming method and a special billiard aiming device and belongs to the technical field of billiard training. According to the technical scheme, more than one auxiliary line of which the length is equal to the diameter or radius of each billiard extends from the central axis of a ball arm, the auxiliary line, a line with the endpoints aiming at the center of a target sphere or a collision point by using the auxiliary line, a connecting line of the center of a virtual sphere adjacent to the target sphere on an extension line of the connecting line of a pocket mouth and the center of the target sphere, and a line from the central axis of the ball arm which passes through the center of a cue ball to the other end of the auxiliary line form a parallelogram; by utilizing the principle that the corresponding sides of the parallelogram are parallel, when the auxiliary line is parallel to a connecting line between the pocket mouth and the center of the target sphere, the central axis of the ball arm is parallel to the line which aims at the center of the target sphere or the collision point, and the target ball can be shot into the pocket. The target ball can be directly aimed and shot, the aiming shot of a second target ball can be realized through pass shoot, even important reference indexes can be provided for aiming of bouncing balls.
Owner:刘佳林

Hard ultrasonic gallbladder endoscope system and using method thereof

The invention belongs to the field of medical apparatus, and particularly relates to a hard ultrasonic gallbladder endoscope system. The hard ultrasonic gallbladder endoscope system comprises a hard gallbladder endoscope with a hard endoscope body, a miniature ultrasonic probe, and an external camera system and an external light source system which are connected with the hard gallbladder endoscope and the miniature ultrasonic probe. The hard gallbladder endoscope of the hard ultrasonic gallbladder endoscope system enters a gallbladder cavity through a micro incision at the bottom of a gallbladder; the miniature ultrasonic probe enters the gallbladder directly through an instrument channel of the hard gallbladder endoscope under the monitoring of the camera system of the hard gallbladder endoscope by taking the hard gallbladder endoscope as a platform, and simultaneously the miniature ultrasonic probe directly observes the condition in the gallbladder cavity clearly; and under the condition that the gallbladder is filled with liquid, the hard gallbladder endoscope makes diagnoses and gives treatment to various gallbladder diseases, the miniature ultrasonic probe performs real-time ultrasonic scanning and performs circular scanning, linear scanning or three-dimensional reconstruction in 360 degrees on the cavity so as to acquire change images of each layer of the gallbladder wall and organs surrounding the gallbladder, so the hard ultrasonic gallbladder endoscope system can determine the position, the size, the appearance and the range of a focus of a disease, improves the medical quality and the medical safety, and overcomes the defects of a diagnosis and treatment method at present.
Owner:GUANGZHOU BAODAN MEDICAL INSTR TECH

A primitive filling method and system based on a dynamic boundary group sequence

The invention discloses a primitive filling method and system based on a dynamic boundary group sequence. The primitive filling method comprises the following steps of obtaining the coordinates of a starting point of a primitive to be filled; scanning the area where the to-be-filled primitives are located row/column by row from the row/column where the starting point is located by using the scanning line, and stopping scanning until boundary points of the to-be-filled primitives do not exist in the scanned row/column; obtaining intersection point position coordinates of scanning lines and boundaries of to-be-filled primitives, marking boundary attributes of the scanning lines, and sequentially pressing the scanning lines and the boundaries of the to-be-filled primitives into a preset boundary group sequence stack; combining the intersection points in the boundary group sequence stack according to the sequence of entering the stack and boundary attributes to generate a single filling point and/or at least one filling line segment taking two adjacent intersection points as two end points; and filling a coordinate area covered by each filling point or filling line segment with a preset color. According to the method, the accuracy of the primitive boundary can be improved, a large number of recursion problems in a traditional filling method are avoided, the stack space is saved, and the primitive filling efficiency is improved.
Owner:NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD

System for reducing tripping frequency of power distribution line

A system for reducing tripping frequency of a power distribution line comprises a province dispatching data-side sub-system, a power grid operation and maintenance sub-system and a fiber transmissionline, wherein the fiber transmission line is used for connecting the province dispatching data-side sub-system and a power grid operation and maintenance sub-system, the province dispatching data-sidesub-system comprises a province dispatching data network, an acquisition server, a first data server, a first switchboard and a first photoelectric converter, the power grid operation and maintenancesub-system comprises a second photoelectric converter, an entity fireproof wall, a communication server, a second data server, a second switchboard and a working station, and an output end of the first photoelectric converter is connected with an input end of the second photoelectric converter via the fiber transmission line. A reliable and safe fault information control platform is formed by fully utilizing an existing network passage of a province power company and fault information of a province database; and by the system, the functions of fault information classified counting, comparisonanalysis, fault positioning, protection configuration setting and operation and maintenance suggestion can be provided according to fault tripping information and fault processing information.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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