101 results about "Threshold point" patented technology

The present invention provides a warning envelope generating method for a civil aircraft terrain awareness and warning system. The method comprises: a step S1 of, according to the initial fight state of an aircraft, building a normal flight path model of no warning conditions, generating a no-warning normal flight path, meanwhile building a pilot evasive operation model, generating an evasive path of the aircraft after warning, comparing the two flight paths with first-order Markov random terrain data separately, and determining whether the warning in the flight simulation is successful; a step S2 of carrying out massive flight simulation, performing statistics on the false warning rate and the warning success rate as warning performance indexes of the system, creating an SOC curve, weighing the influence of the two indexes on the system, and selecting an optimum warning threshold point; and a step S3 of generating the whole warning envelope. According to the invention, the influences of false warnings and missed warnings on the warning system are taken into consideration, so that the warning envelope finally generated is reasonable, and the occurrence of false warnings and missed warnings is reduced.

An apparatus and method for controlling a clutch of a hybrid vehicle are provided. The method includes: setting, by a controller, a limited torque to a motor torque and comparing an input speed of the transmission and a minimum speed of the engine when converting from an EV driving mode to an HEV driving mode. The controller is configured to start the engine when the input speed of the transmission is equal to or greater than a minimum threshold point and is equal to or less than a minimum speed of the engine. Further, the method includes increasing the motor torque to exceed the preset limited torque, coupling the first clutch when the engine speed and a motor speed are synchronized, and coupling the second clutch when the input speed of the transmission exceeds the minimum speed of the engine by the controller.

The invention discloses a lithium battery residual life prediction method, which comprises the following steps: acquiring the capacities of a plurality of charge-discharge cycles of a lithium battery,and normalizing the capacities; performing window division on the normalized capacitances to obtain a training data set; inputting the training data set into a degradation state model comprising a convolutional neural network and a long and short memory recurrent neural network for training; inputting the last window data of the training data set into a trained degradation state model for slidingprediction until the predicted capacitance reaches a capacity degradation threshold point; and predicting the remaining life of the to-be-tested lithium battery according to the sliding cycle numbercorresponding to the predicted capacity value. According to the method, the feature extraction capability of the convolutional neural network and the time sequence prediction capability of the long and short memory recurrent neural network are fused, the degradation features of the lithium battery are effectively extracted and predicted, and the prediction precision is improved. And the window size of the degradation index is automatically determined by using the false nearest neighbor method, so that the calculation efficiency is improved.

The invention relates to a double-pointer instrument number reading method based on machine vision. The method comprises the following steps of acquiring a template picture and performing modeling, performing characteristic detection on a to-be-identified instrument picture, and acquiring target area positioning in the to-be-identified instrument picture by means of characteristic matching; intercepting a dial area graph from the target area; preprocessing the dial area graph, searching a reading number pointer area and eliminating a shadow; searching a reading number pointer line by means ofthe reading number pointer area; acquiring a threshold pointer image according to a pointer color characteristic which is stored in modeling; preprocessing the threshold pointer image, searching a threshold point area and eliminating the shadow; searching a threshold pointer line by means of the threshold point area; determining directions of two pointers by means of a projection method; and finishing number reading of two pointers by means of an angle method. According to the method of the invention, the target area can be accurately positioned on the condition of dial rotating and illumination changing; the method can be adapted with the conditions of pointer breaking and adhesion between the pointer and texts in the image; and furthermore the method is not interfered by the pointer shallow, thereby realizing relatively high accuracy and stability.

In a converter-controller the controller includes a primary power device coupled to a primary coil and a resonant reset capacitor in parallel with the primary power device. The controller can switch the primary power device with a variable frequency. The resonant capacitor and the primary coil have a primary resonant cycle. The controller can turn on/off the primary power device for half of the primary resonant cycle. The controller includes a first secondary power device, having a first voltage and a second secondary power device, having a second voltage, each voltages having a rising threshold-point and a falling threshold-point. The first and second secondary power devices are coupled to the control logic and to corresponding terminals of the secondary coil. The controller can synchronize the rising threshold-point of the first voltage with the falling threshold-point of the second voltage or vice versa.

The invention discloses an over-temperature protection circuit used for a high-side power switch. The over-temperature protection circuit concretely comprises a reference voltage generation module, a temperature detection module, an output control and shaping module, a positive feedback retardation module and a protection module. The reference voltage generation module generates a stable voltage independent of a temperature and a power supply voltage. The temperature detection module converts a temperature signal into a voltage signal. The output control and shaping module outputs an over-temperature control signal according to change of the detection signal. The positive feedback retardation module adjusts a temperature detection signal according to the over-temperature control signal and achieves temperature retardation. The over-temperature protection circuit can be used for a power integrated circuit of a high-side power switch or the like, and a thermal turn-off threshold point cannot change along with power supply change. In addition, the over-temperature protection circuit can be well compatible with different power switch circuits inputting control levels and is suitable for high-side power switch circuits inputting control levels with various amplitudes.

The invention discloses an over-charge voltage protection detection circuit and system. The over-charge voltage protection detection circuit comprises a detection module, a first switch module, a second switch module, a voltage dividing module, a comparison module and a reference generating module; the detection module controls the first switch module to be turned on and the second switch module to be turned off; the voltage dividing module is used for sampling an input voltage of a power input end and outputting a sampled voltage to the comparison module; the reference generating module outputs a reference voltage to the comparison module; when the sampled voltage is higher than the reference voltage, the comparison module outputs a first level signal to the detection module, and the detection module controls the input voltage to be reduced to a preset voltage; and when the sampled voltage is lower than the reference voltage, the comparison module outputs a second level signal to thedetection module, and the detection module controls the input voltage to be increased to the preset voltage. By stabilizing the input voltage at an over-charge voltage protection threshold point, accurate measurement on the over-charge voltage protection threshold point is achieved.

This invention relates to one memory radiation test method and its device, wherein, the device comprises radiation source, level conversion circuit, main control unit, and data input unit and system set and process unit. This invention method comprises the following steps: writing designed data on one memory device; then starting radiation source for memory intensity, set distance, set time; in testing process reading and writing data to the memory part according to read mode; real time comparing the memory part real time output value and predication value to judge whether its is right; once there is wrong data rightly recording its invalid information to find out threshold point of invalid of memory.

The embodiment of the invention discloses a gamma register calibration method, a gamma register calibration device and a display device. The gamma register calibration method comprises the steps of obtaining a first threshold point and a second threshold point by adjusting a register value of a gamma register; determining a linear prediction relational expression based on the first threshold pointand the second threshold point; obtaining a register prediction value under the target brightness value based on the linear prediction relational expression; correcting the register prediction valueby adjusting the register value of the gamma register to obtain a third threshold point; dividing the brightness sections corresponding to the first threshold point and the second threshold point intotwo new brightness sections by using the third threshold point; and taking one threshold point corresponding to the two end points of each new brightness section as a new first threshold point, taking the other threshold point as a new second threshold point, and returning to execute the step of determining the linear prediction relational expression based on the first threshold point and the second threshold point. According to the embodiment of the invention, the calibration speed of the gamma register can be improved.

The invention relates to an integrated prediction method for fusing multiple major adverse cardiovascular event prediction models. The method comprises the following steps of binarizing output results of to-be-fused major adverse cardiovascular event prediction models, and according to the binarized output results of the prediction models, calculating a weight value of each independent prediction model by using a rough set theory; normalizing the output results of the to-be-fused major adverse cardiovascular event prediction models, and for the normalized output results of the prediction models, formatting an optimal classification threshold point to 0.5; and according to the weight values and the normalized output results, calculating basic probability assignment of each patient, combining output items of the independent prediction models by using a Dempster rule synthesis method to obtain a combined mass function, and calculating a final output value of the integrated prediction method. According to the integrated prediction method, the problem of uncertainty in models built by using electronic medical record data is solved, so that the prediction accuracy of the models is improved.

The invention discloses an amplitude-frequency time-varying process signal segmentation method based on a sliding window. The method comprises the following steps of: (1) setting a sliding window foran amplitude-frequency time-varying process signal to be analyzed; (2) calculating a mean value of each process signal point in the sliding window, and dynamically setting a segmentation threshold point under the process curve according to the mean value so as to obtain a lower segmentation line; (3) determining each lower segmentation point of the process curve according to the lower segmentationlines, and segmenting the process curve according to the lower segmentation points; And (4) calculating the similarity of the segmentation curves by using the process signals in the segmentation curves, and carrying out segmentation effectiveness judgment. According to the method, process period segmentation is carried out on the amplitude-frequency time-varying process curve, and the method canadapt to the change of process parameters and has relatively high adaptability, stability and robustness.

Present novel and non-trivial systems and methods for generating aircraft height data are disclosed. A processor is configured to receive both first data comprised of radar-based reflection data of a stationary reference point based upon a horizontal distance between the geographic position of an aircraft and the geographic position of the stationary reference point (e.g., landing threshold point) and second data comprised of internally sourced vertical travel data more frequently than the first data. From the first data and second data, an instant vertical distance above the stationary reference point is determined by updating the first data with the second data. Then, instant height data representative of the instant vertical distance above the stationary reference point is generated. Provided with the instant height data, a presentation system comprised of display unit, aural alert unit and/or a tactile alert unit may present the instant vertical distance to the pilot.

The invention provides a multipath error extraction method based on self-adaptive semi-soft threshold wavelet transform. The multipath error extraction method is applied to the elimination of multi-path errors in a global satellite navigation system. The multipath error extraction method comprises the steps of: firstly, acquiring a residual value of a double-difference pseudo-range by using a satellite observation value, and regarding the residual value as signals to be processed; performing multi-scale analysis on the signals to be processed by using wavelet transform, and extracting a multipath signal to be processed from the signals; and filtering the multipath signal to be processed by means of an FIR filter to obtain a final multipath error signal, wherein a threshold function in wavelet transform adopts a self-defined semi-soft threshold function, and a self-adaptive method is adopted for searching a threshold point. The multipath error extraction method provided by the inventionhas the advantages of small calculation amount, fast calculation speed and high implementability, and is capable of self-adaptive adjustment according to different experimental environments, so as toachieve the best effect of suppressing multipath errors.

A method of controlling the temperature of an environment, includes the steps of providing a thermostat and receiving a signal from an occupancy sensor indicating whether an area has been occupied for each discrete time period of a 24 hour time period, assigning a first point value to each discrete time period where occupancy has been sensed, and repeating the steps for the next two 24 hour periods, and averaging the point values for each discrete time period in the first, second, and third 24 hour periods, to obtain an average point value, and sending a first signal to a heating device adapted for heating a second area to provide a temperature-related setting for a given discrete time period when the average point value for that discrete time period is above a threshold point value.