52results about How to "Improve comparison accuracy" patented technology

An ultrasonic image 105, 106 is captured by an ultrasonic probe 104. A reference image 111 is obtained by extracting a tomographic image corresponding to the scan plane of the ultrasonic image from volume image data that is pre-obtained by a diagnostic imaging apparatus 102 and that is stored in a volume-data storing unit 107. The ultrasonic image and the reference image 111 are displayed on the same screen 114. In this case, of the reference image, a portion corresponding to the view area of the ultrasonic image is extracted and the resulting reference image having the same region as the ultrasonic image is displayed as a fan-shaped image.

The invention discloses an LED (light-emitting diode) backlight drive circuit, a liquid crystal display device and a drive method. The LED backlight drive circuit comprises a plurality of LED lamp bars arranged in parallel and a detection module, wherein a comparing unit is arranged in the detection module, the comparing end of the comparing unit is respectively coupled to the output ends of the LED lamp bars, and the reference end of the comparing unit is coupled with an adjustable reference voltage module. Due to the adoption of the comparing unit, and the reference end of the comparing unit is coupled with the adjustable reference voltage module, different reference voltage values can be selected according to the voltages of the output ends of the LED lamp bars of different liquid crystal displays, the difference of the voltages of the output ends of the LED lamp bars and the reference voltage is controlled within a reasonable range, the comparing accuracy can be effectively improved, then the maximal difference is fed back to the power source end of a drive, and the output of the power source is regulated.

A DC protection scheme for protecting a DC power transmission medium within a DC electrical power network. The scheme includes a protection device coupled to a DC power transmission medium, being operable to protect the power transmission medium from a fault; an apparatus to measure at least one electrical property of the power transmission medium; and a controller programmed to determine the direction of the electrical fault; determine whether the electrical fault is an internal or external fault; and operate the protection device to protect the DC power transmission medium if the determination of the direction of the electrical fault and/or the determination of whether the electrical fault is an internal or external fault meet a predefined criterion.

If spatial measurement point intervals in imaging mass analysis data of two samples to be compared are different and the degrees of spatial distribution spreading of substances are compared, one of the data is defined as a reference, the measurement point intervals in the other of the data are redefined so as to be equalized to the reference, and a mass spectrum at each virtual measurement point set as a result of the redefinition is obtained through interpolation or extrapolation based on a mass spectrum at an actual measurement points. If the arrays of the m/z values of mass spectra are different for each sample, the m/z value positions of the mass spectrum in one of the data are defined as a reference, and the intensity values corresponding to the reference m/z values are obtained through interpolation or extrapolation for the mass spectrum of the other of the data.

A method for checking cooling holes of a gas turbine blade, including in sequence: step 1: injecting a liquid plastic material into a cooling hole of a gas turbine blade; step 2: stopping the flow of the liquid plastic material, and curing the liquid plastic material to form a model; step 3: separating the model from the gas turbine blade; step 4: scanning the model. By scanning the model, the cooling holes of the gas turbine blade can be checked, so as to obtain more data about the position, dimensions and shape thereof, while improving the accuracy and efficiency of measurement.

A semiconductor integrated circuit includes a differential amplifier circuit receiving first and second input voltages, a latch circuit comparing a voltage received from a first output terminal of the differential amplifier circuit through a first capacitor and a voltage received from the second output terminal of the differential amplifier circuit through a second capacitor and providing a digital signal representing a result of a comparison between the first and second input voltages, and a third capacitor having a first terminal coupled to a second terminal of the first capacitor and a second terminal coupled to a second terminal of the second capacitor.

The invention provides a low-power-consumption and low-delay current comparator based on Wilson current sources, and a circuit module. The low-power-consumption and low-delay current comparator basedon the Wilson current sources comprises a first Wilson current source and a second Wilson current source serving as an input stage, a differential amplifier serving as an intermediate stage, and an output gain stage serving as an output stage, wherein a first input current and a second input current, which serve as comparison objects, are respectively input into the first Wilson current source anda second Wilson current source; an output end of the first Wilson current source and an output end of the second Wilson current source are respectively connected to two input ends of the differentialamplifier; and an output end of the differential amplifier is connected to the output gain stage. A current structure provided by the invention has the advantages of high comparison precision and a low-delay propagation characteristic.

The invention belongs to the technical field of natural language processing, in particular to a text implication recognition method and a device. The present invention aims at solving the problems ofcomplex feature description and feature extraction of sentences in the prior art. The text implication identification method of the invention comprises the following steps: the source sentence and thetarget sentence of the text implication pair to be identified are subjected to dependency syntactic analysis; according to the analysis result, the source sentence dependency triple set and the target sentence dependency triple set are obtained; the semantic relationship between the source sentence dependent triple set and the target sentence dependent triple set is compared and the comparison result is obtained. The semantic implication relationship between source sentences and target sentences is predicted according to the comparison results. The method of the invention can improve the comparison precision between sentences from the whole angle and the alignment precision between the dependent triples of the sentences, thereby improving the accuracy of the prediction of the semantic implication relationship. The device of the invention also has the above-mentioned beneficial effects.

The present invention discloses a method for evaluating, monitoring, and improving judicial system performance. Methods of the present invention are capable of evaluating any judicial center regardless of jurisdiction. The evaluation score generated according to methods of the invention is capable of being compared directly. Also disclosed are computer information systems and computer-implemented methods for carrying out the evaluation, monitoring, and improving method.

The invention discloses a self-calibration zero-crossing comparator and a direct-current conversion circuit. The self-calibration zero-crossing comparator comprises a first comparison module, a logicmodule, a compensation module and a second comparison module, wherein the first comparison module is used for comparing the reference voltage with the sampling voltage and outputting a state signal; the logic module is used for generating a logic control signal according to the state signal; the compensation module is used for biasing the first power supply signal to generate a bias signal and compensating the sampling voltage according to the logic control signal to generate a compensation signal; the second comparison module is used for comparing the bias signal with the compensation signaland outputting a zero-crossing comparison signal. The precision of the zero-crossing comparator can be improved on the basis of not increasing the cost.

The invention relates to a big data information collection system, and the system comprises a first database which is used for storing data collected from external data to the first database through a first transmission channel at a transmission speed V10; a collecting module which is connected with the first database through a second transmission channel and used for screening data matched with the key character string from the first database according to the input key character string, the collecting module comprises an establishing unit and a screening unit, the establishing unit is used for establishing the second transmission channel, the screening unit is used for transmitting the data screened from the first database to the acquisition module through a second transmission channel at a second transmission speed V20; and a central control module which is connected with the first database, the collecting module and the display module. By adjusting the first transmission speed and the second transmission speed, transmission speed matching is carried out according to the data transmission quantity during storage after transmission and data screening, efficient transmission of data is realized, and the data acquisition efficiency is improved.

The invention relates to a pipeline-SAR ADC digital inter-stage gain calibration method based on metastable state detection. The method comprises the steps: carrying out the step-by-step comparison of an analog circuit, dividing the step-by-step comparison into N stages, carrying out the metastable state detection of comparators in the second stage to the Nth stage, and outputting a metastable state pointer of each stage to a digital circuit; when the pointer received by the digital calibration circuit is 1, accumulating the current data until the number of the accumulated data reaches the upper limit, completing the calibration of the stage, averaging the accumulated sum of the data, and taking the averaged sum as the inter-stage gain between the stage and the previous stage; and repeating the steps to obtain the inter-stage gain of each stage, and processing the inter-stage gain of each stage to obtain a calibration result of the digital calibration circuit. According to the invention, errors caused by capacitor mismatch of a common traditional SAR-ADC can be greatly improved; Meanwhile, the region is smaller than that of a correction type pipeline ADC, so that the comparison precision is greatly improved.

The invention discloses a data comparison collision method and device. The method comprises the steps of obtaining a specified space-time range; performing data processing on the trajectory data in the space-time range, wherein the data processing comprises the steps of standardizing the track data into spatio-temporal data and performing spatio-temporal index processing on the spatio-temporal data to obtain spatio-temporal feature index data; performing spatio-temporal feature denoising processing on the spatio-temporal feature index data to obtain denoised spatio-temporal feature index data,wherein the spatio-temporal feature denoising processing comprises the steps of marking whether corresponding data in one or more spatio-temporal parameter items exists or not from spatio-temporal feature index data; extracting collision data to be compared from a preset spatial-temporal feature library according to spatial-temporal index dimensions in the denoised spatial-temporal feature indexdata; and performing trajectory similarity calculation on the trajectory data and the collision data to be compared to complete spatio-temporal data comparison collision. Through the scheme of the embodiment, data extraction is completed quickly, the calculated amount is reduced, and the comparison accuracy is improved.

The invention belongs to the marine satellite technology field, especially relates to a marine satellite ground station climate monitoring system comprising a main control module, a sensor module, and an alarming device driving module. The main control module comprises a chip U1, a triode Q2, and a triode Q3. The pin 2 of the chip U1 is connected with the base electrode of the triode Q2, and the sensor module comprises a chip U2, the pin 1 of which is connected with a sensor J1. The emitter electrode of the triode Q1 is grounded. The alarming device driving module comprises an amplifier U2, and the pin 1 of the alarming device J1 is connected with the pin 1 of the amplifier U3. The other end of the motor M1 is connected with one end of the capacitor C1, and is grounded, and the pin 2 of the amplifier U3 is connected with one end of the resistor R2, and is connected with the pin 15 of the chip U1, and the other end of the resistor R1 is connected with the pin 17 of the chip U1.