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64 results about "Trend detection" patented technology

Sinus heart rate turbulence trend detection method based on piecewise linearization

The invention discloses a sinus heart rate turbulence trend detection method based on piecewise linearization. The piecewise linearization is adopted for specifically analyzing whether the variation trend of sinus heart rate accelerates first and then decelerates after premature ventricular contractions or not. The method includes the steps: (1) electrocardiosignal preprocessing; (2) self-learning process for first 10 seconds; (3) HRT (heart rate turbulence) sample collection; (4) piecewise trend analysis; and (5) turbulence trend representation based on a cloud model. The variation trend of the sinus heart rate at the RR interval is detected by means of piecewise linearization, and the turbulence trend is further represented by natural language through the cloud model. By the aid of an MATLAB (matrix laboratory) simulation tool, signals in an MIT-BIH heart beat irregularity database are selected for verification, and the variation trend of the sinus heart rate after single-time ventricular premature beat can be detected correctly. In addition, using the exponential smoothing method to predicate QRS complex occurrence positions to facilitate detection of QRS complex, and using a template for judging sinus heart beat is simple to implement and suitable for real-time treatment.
Owner:SHANDONG NORMAL UNIV

Method for rapidly testing casting blank segregation by utilizing direct-reading spectrometer

The invention discloses a method for rapidly testing casting blank segregation by utilizing a direct-reading spectrometer, which is suitable for the quantitative and trending detection in the casting blank segregation, belonging to the technical field of metallurgy analyzing and detecting. In the method, the direct-reading spectrometer is adopted to simulate an in-situ analyzer to detect the casting blank segregation; and the direct-reading spectrometer segments and dots a test sample, and simulates the in-situ analyzer to analyze the test sample, so as to quantitatively detect the continuously cast blank macrosegregation. The method can overcome the defects that the in-situ analysis sample preparation is complex, the testing period is long, the detection cost is high and the like, satisfies the generalized quantitative detection to the casting blank in the continuous casting production, and provides a good popularization and reference method for the iron and steel enterprises owning rapid spectrum analyzers in the trending and quantitative detection of the continuously cast blank segregation. Compared with the traditional pickling method for detecting the casting blank segregation, the method has the same trend on the description of the casting blank segregation as that of the pickling method; the casting blank segregation result detected by the direct-reading spectrometer not only can describe the casting blank segregation condition, simultaneously can clearly describe the component segregation curve of each element, and has the visual digitized function.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY

Plant growing trend detection and diagnosis method oriented to cotton targeted fertilizing

The invention discloses a plant growing trend detection and diagnosis method oriented to cotton targeted fertilizing in the field of agricultural production and detection. The method includes: before flowering and fruiting of cotton, measuring GPS (global positioning system) coordinate values of four border lines of a cotton planting area, planning flying collection route, GPS coordinate values of hover photographing points and distance between flying plane and the ground of an unmanned aerial vehicle loaded with image collection equipment and ultrasonic ranging equipment, taking cotton plant pictures at each hover photographing point by the image collection equipment, and measuring distance between the tops of the cotton plants and the flying plane by the ultrasonic ranging equipment; calculating height and light transmittance of the cotton plants by a computer, respectively comparing the height and the light transmittance with threshold values, and if any diagnosis index of the height or the light transmittance of the cotton plants is abnormal, indicating that growing trend of the cotton plants in the area is abnormal. By the method, large-area cotton plant growing trend targeted diagnosis is realized, and local areas weak or strong in growing trend are recognized, so that automation level is increased, and an effective basis is provided for cotton planting management.
Owner:JIANGSU UNIV

Telephone traffic abnormity detection method and device

ActiveCN107566665AOvercome the defects in setting alarms by directly collecting historical traffic volumeImprove accuracySpecial service for subscribersSupervisory/monitoring/testing arrangementsAnomaly detectionTime trends
The invention provides a telephone traffic abnormity detection method and device. The method includes the following steps: a historical trend threshold regular calculation step: cleaning historical telephone traffic data and regularly calculating a historical trend threshold on the basis of the cleaned historical telephone traffic data; a historical threshold detection step; a real-time trend detection step: calculating a real-time trend threshold on the basis of telephone traffic data ahead of a current detection point within a first period of time, and detecting whether the current telephonetraffic quantity exceeds the real-time trend threshold; a historical trend detection step: detecting whether the current telephone traffic quantity exceeds the historical trend threshold; and a warning sending step: if the current telephone traffic quantity exceeds a historical threshold, the real-time trend threshold and the historical trend threshold, sending out warning information. On the basis of detection of the historical threshold, real-time trend detection and historical trend detection are added, thereby overcoming the disadvantage of warning setting through direct collection of historical telephone traffic quantity and improving the accuracy of telephone traffic abnormality detection.
Owner:携程旅游信息技术(上海)有限公司

Telephone traffic exception automatic detection method and system, storage medium and electronic device

The invention discloses a telephone traffic exception automatic detection method and system, a storage medium and an electronic device. The telephone traffic exception automatic detection method comprises the following steps of obtaining historical data of telephone traffic in a first time period away from a current detection point; according to the historical data in the first time period, selecting a time dimension of data aggregation; classifying the historical data of the telephone traffic in the first time period; obtaining historical data of the telephone traffic in a second time periodaway from the current detection point; according to the selected time dimension, aggregating the historical data in the second time period, and performing segmentation to form multiple time slices; calculating an upper limit value and a lower limit value of threshold detection of each time slice through Gaussian distribution; calculating an upper limit value and a lower limit value of change ratedetection of each time slice through the Gaussian distribution; and performing the threshold detection and the change rate detection on the current detection point, if any detection result is exceptional, performing trend detection, and if the trend detection is exceptional, giving an alarm.
Owner:CTRIP TRAVEL NETWORK TECH SHANGHAI0

Design and realization method for preventing low-profile reel from bursting lines

ActiveCN110583593ASimple and reliable castingDetect the trend of fried linesLinesMagnetic tension forceEngineering
The invention discloses a design and realization method for preventing a low-profile reel from bursting lines and relates to a low-profile reel of a fishing rod and a use method of the low-profile reel. The technical problems are solved that the braking force of existing line burst prevention brakes of low-profile reels in the use process cannot be adjusted dynamically, the structures of the electronic brakes are too complicated, and the cost is high. The design comprises a line cup rotation speed detection system, a braking force adjustment system and a PE line burst trend detection system, wherein the line cup rotation speed detection system comprises a visible-light emitting diode, a light receiving triode, a visible-light absorption semi-circular ring and a light reflecting semi-circular ring; when a line cup rotates, a receiving circuit receives a pulse signal, correspondingly the rotation speed of the line cup is thus detected, and the braking force of the braking system is dynamically adjusted according to the rotation speed. The braking force adjustment system comprises two main parts, namely an electromagnet and a soft magnet on the line cup, and braking is carried out under the action of a magnetic force and a friction force. According to the design, different braking forces can be provided according to different flying speeds of artificial lure baits, so that the purpose of preventing line burst is achieved.
Owner:黄光佐

Test detection system and method for scaling of voltage-sharing electrode of high-voltage direct current converter valve

The invention discloses a test detection system and method for scaling of a voltage-sharing electrode of a high-voltage direct current converter valve. The system comprises a voltage-sharing electrodescaling inhibiting device, a voltage-sharing electrode scaling detection device, a central control and processing device and a scaling trend detection and analysis background, wherein the voltage-sharing electrode scaling detection device is used for adjusting the water environment of cooled water in the mounting position of the voltage-sharing electrode and inhibiting scaling of the voltage-sharing electrode; the voltage-sharing electrode scaling detection device is used for detecting the PH value, conductivity, oxidoreduction reaction potential, AL ion concentration, CL ion concentration and leakage current of the cooled water in the mounting position of the voltage-sharing electrode; the central control and processing device and the scaling trend detection and analysis background calculate the scaling trend of the voltage-sharing electrode and judges the effectiveness of the voltage-sharing electrode scaling inhibiting device in inhibiting scaling of the voltage-sharing electrode.The test detection system and method can evaluate the scaling trend of the voltage-sharing electrode and the scaling inhibiting effect of each scaling inhibiting device and can be widely applied to annual overhaul, fault analysis and system optimization of the high-voltage direct current converter valve.
Owner:EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID

Unit, transformer and auxiliary machine state monitoring and intelligent early warning methods

ActiveCN112885047AAccurate early warning of trends in multi-dimensional monitoring indicatorsImprove timelinessMeasurement devicesHydro energy generationTransformerMonitoring system
The invention discloses a unit state monitoring and intelligent early warning method comprising the following steps: determining a first monitoring system used for monitoring the operation state of a water-turbine generator set, the first monitoring system comprising at least one type of monitoring variable; judging whether the current unit working condition data meets the working condition judgment condition corresponding to each type of monitoring variable or not; and when the current unit working condition data meets the working condition judgment condition corresponding to each type of monitoring variable, obtaining a type of detection result of each type of monitoring variable through a continuous increasing trend detection method according to the obtained monitoring record text of each type of monitoring variable. The invention also discloses a transformer state monitoring and intelligent early warning method and an auxiliary machine state monitoring and intelligent early warning method. According to the invention, the change trend of state monitoring data of different hydropower station equipment can be intelligently analyzed, and the timeliness and accuracy of trend early warning can be effectively improved.
Owner:HUNAN WULING POWER TECH CO LTD +1

Method and device for determining temperature change trend and electronic equipment

The invention discloses a method and a device for determining a temperature change trend and electronic equipment. The method comprises the following steps: collecting a plurality of temperature observation data of a target observation point in a target time period corresponding to a sunset moment of the same day to a sunrise moment of the next day; according to the obtained temperature observation data corresponding to different moments, performing fitting operation on a preset fitting function by using a preset fitting algorithm until an error value between the temperature observation data and corresponding fitting data in a fitting result meets a preset error condition, and obtaining cooling intensity according to the fitting result; calculating according to the steps to obtain the cooling intensity of each day in multiple consecutive days; According to the cooling intensity of each day in the continuous multi-day, determining the temperature change trend in the multi-day by using a preset trend detection algorithm. The temperature characteristic of the day is represented by extracting the cooling intensity capable of representing the stable cooling trend, the advantage in the aspect of high-frequency disturbance resistance is obvious, and the accuracy of a temperature trend analysis result is improved.
Owner:INST OF GEOLOGY CHINA EARTHQUAKE ADMINISTRATION
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