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50 results about "Stroke risk" patented technology

Thunder damage protection risk automatic assessment method for power transmission line

ActiveCN103412995AReduce lightning trip rateImprove the ability to resist lightning damageSpecial data processing applicationsTransient stateLightning strokes
The invention provides a thunder damage protection risk automatic assessment method for a power transmission line. The thunder damage protection risk automatic assessment method comprises the steps of collecting parameters of a typical pole tower and recording values of parameters comprising thunder parameters, pole tower parameters, landform parameters, line parameters and cloud-to-ground lightning parameters; establishing a back striking calculation model and a shielding failure calculation model according to the parameters of the typical pole tower; calculating the shielding failure trip-out rate n1 of the pole tower on the basis of electromagnetic transient calculation program and according to the parameters of the typical pole tower and the shielding failure calculation model; calculating the pole tower shielding failure trip-out rate n1=NgP1eta on the basis of a guiding developing model; calculating the average lightning stroke trip-out rate N according to the back striking trip-out rate n1 and the shielding failure trip-out rate n2; and performing grading on the whole line pole tower based on lightning stroke risks according to the average lightning stroke trip-out rate N. The pole tower with the severe anti-thunder situation can be found before lightning stroke faults occur in the line, modification measures are adopted ahead of time, and the lightning stroke trip-out rate of the power transmission line is reduced.
Owner:SHENZHEN POWER SUPPLY BUREAU

Electric transmission line straight line angle tower lightning protection measure collocation method

InactiveCN103887756AReduce the difficulty of lightning protection constructionSave lightning protection engineering costsInstallation of lighting conductorsWeight coefficientEngineering
The invention discloses an electric transmission line straight line angle tower lightning protection measure collocation method. The method comprises the steps that a line by-base tower is evaluated, and risk grades are divided; lightning protection modification m subgoals and weight coefficients of the subgoals are determined, and a goal weight column vector W is obtained; whether the tower lightning trip-out rate meets operating indexes or not is judged, and k alternative lightning protection measures are selected from common lightning protection measures; according to lightning protection modification actual investigation goals, the goal effect row vectors of the alternative lightning protection measures on the subgoals are determined one by one, k row vectors are combined to form a goal effect matrix F with dimensionality being k*m, and effect vectors of the alternative measures are obtained through calculation; the expected lightning trip-out rate after governance is calculated, and the lightning protection measure collocation process is conducted in an iteration mode. The electric transmission line straight line angle tower lightning protection measure collocation method is implemented based on lightning stroke risk evaluation results and combined with the lightning protection modification goals, optimizes lightning protection collocation, reduces the lightning trip-out rate, reduces the lightning protection engineering cost, lowers lightning protection construction difficulty and improves technology economy of the comprehensive lightning protection measures.
Owner:STATE GRID CORP OF CHINA +3

Monitoring method and device of wind electricity unit thunder stroke times

The invention discloses a monitoring method of wind electricity unit thunder stroke times. The monitoring method comprises the steps that (1) temperature change values and temperature raising time data of all anti-thunder modules in a wind electricity unit are collected, and the state data values of the environment where the anti-thunder modules are located are collected; (2), whether the anti-thunder modules are struck by thunder or not is analyzed and judged in combination with temperature data signals of all the anti-thunder modules and state data signals of the environment where the anti-thunder modules are located collected in step (1), and the accumulated thunder stroke times of all the anti-thunder modules are calculated. The invention furthermore discloses a monitoring device of the wind electricity unit thunder stroke times. The monitoring device comprises the anti-thunder modules, a data collection module and a data processing module. The thunder stroke times of the anti-thunder modules are monitored through monitoring of the temperature change of the anti-thunder modules; and targeted anti-thunder design can also be achieved according to the collected data signals, impact and influences of a draught fan on a control system due to thunder stroke are reduced, the thunder stroke risk of the draught fan is lowered to a certain extent, and operation safety and stability of the wind electricity unit are improved.
Owner:GUODIAN UNITED POWER TECH

Method And Device For Analyzing The Retinal Vessels By Means Of Degital Images

It is the object of a method and apparatus for retinal vessel analysis based on digital images to enhance the ability to discriminate between healthy vessel states and at-risk vessel states while reducing manual effort and saving time in order to allow individual vascular risk, particularly stroke risk, to be determined in a more reliable manner and with fewer subjective systematic and random errors. The vessel segment diameter, type of vessel and the image coordinates are determined for a series of adjoining vessel segments along vessel portions in a measurement zone surrounding the papilla and are stored by vessel segment with reference to the evaluated image, to a reference image recorded with a time offset, and to a displacement vector that is determined for the vessel segment between the reference image and an evaluated comparison image. Comparison measurements are carried out only on identical vessel segments already measured in the reference image. The correlation of vessel segments to vessel portions and to vessel type is adopted intact from the reference image. The stored data sets for the vessel segments of the reference image and comparison images provide a progression of coordinate-oriented vessel segment diameters for all measured vessel segments as basis for determining parameters and presenting them in a spatially resolved progression, e.g., in progress images.
Owner:IMEDOS INTELLIGENTE OPTISCHE SYST DER MEDIZIN & MESSTECHNIK GMBH

Rapid stroke identification method combining TOPSIS and artificial intelligence

The invention relates to a rapid stroke identification method combining TOPSIS and artificial intelligence, and the method comprises the steps: firstly, judging whether the single-side muscle force decline exists or not through the horizontal lifting degree of the two arms of a user, and carrying out the classification of the muscle force difference through the angle between the arms; analyzing the degree of unclear mouth and teeth of the user through artificial intelligence speech recognition in combination with a word error rate calculation method; detecting position coordinates of face feature points by using an artificial intelligence face feature point recognition model, calculating a face droop degree through a TOPSIS method, and finally quickly recognizing the stroke risk degree through the TOPSIS method by synthesizing muscle force difference classification, an unclear degree of mouth and teeth and a face droop degree. According to the invention, the patient and the family members thereof can effectively and quickly identify the stroke symptom at home, and the stroke patient is automatically shunted to the corresponding stroke center for treatment according to different severity degrees of the stroke, so that the first-aid efficiency and quality of emergency medical aid service are improved.
Owner:东禾软件(江苏)有限责任公司 +2
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