133 results about "Curve matching" patented technology

The invention discloses a robot indoor positioning and navigating method based on vision, belonging to the field of vision navigation. According to two-dimension codes, the method designs a manpower road sign which is simple and convenient, is easy to recognize, internally contains absolute position coordinates and has certain error correction capability; the road sign is arranged on a ceiling; a camera arranged on the robot, with the optical axis vertical to the ceiling, is used for photographing; the coordinate information included in the road sign is analyzed by road sign positioning of a series of steps such as threshold segmenting of images, extracting of communicating region, profile curve matching and recognizing of road sign characteristic; and the current absolute position and course angle of the robot can be finally obtained by the position estimation arithmetic of the robot. The method has the advantages of reducing the blocking and noise interference, and greatly reducing the processing time and the complexity of surrounding environments of the image processing method.

This invention relates to one visual frequency stable method based on property matching in the computer image visual frequency process technique field, which comprises the following steps: finding out each frame of visual SIFT property points; adopting simulation module as parameters estimation module for total estimation; adopting Gauss filter and curve matching method to process visual sequence process to fill unknown area.

This invention disclosed a three-dimension measurement method which consists of preparation, picture intussusception, coding spot identification, camera location confirmation, target curve pick-up, homonymic curve matching and target curve reconstruction. It has the following characteristics: mark on the target curve before measuring to make the picture identification much more easy; place a guage and a set of coding spots around the target object; screen randomly to obtain a set of image by the camera; calculate automatically the position and gesture of the camera according to the images; pick up the marked curve and match the homonymic curve in different images so that the information of three-dimensional spot line was automatically calculated.

The invention discloses an electrocardiosignal data processing method. The electrocardiosignal data processing method comprises the following steps of (1) collecting data of electrocardiosignals; (2) carrying out preprocessing on the collected data of the electrocardiosignals, wherein baseline drift removal processing and de-noising processing are carried out on the collected electrocardiosignals; (3) decomposing the electrocardiosignals into single-cycle electrocardiosignal sets; (4) carrying out characteristic extraction, carrying out signal classification according to single-cycle electrocardiosignals after normalization and the level of similarity of curve signals, and choosing electrocardiosignals in the maximum class as a template; (5) detecting signal input, carrying out similarity comparison between the electrocardiosignals and a central database template to determine the identity. According to the single-leading electrocardiosignal data processing method, the mode of characteristic curve matching is adopted to carry out curve similarity comparative studies on electrocardiosignal sequences, and complex procedures for extracting characteristic points are avoided.

The invention discloses a screening method of parallel lithium ion batteries, and provides a convenient and effective screening method aiming at the particularity of the parallel battery groups by combining with the static variation and dynamic variation of batteries. The factors to consider for screening are sequentially internal resistance consistency, constant flow charging ratio consistency, voltage pressure consistency, self discharge rate consistency, capacity consistency and charge and discharge characteristic curve matching consistency. The battery performances are judged comprehensively at multiple aspects, so that single battery cells with approximate internal features are screened out, and further parallel battery groups with good consistency are formed by matching; the safety and reliability of the battery groups are improved.

A demand regulator with air dilution regulates the pressure and flow of a respiratory gas with an outlet leading to a respiratory mask. A dilution valve controlled by a Bourdon tube varies the ratio of atmospheric air to oxygen in a crew mask based on ambient pressure. The Bourdon tube in the dilution valve assembly flexes in response to changes in atmospheric pressure causing the dilution valve to gradually open or close. As altitude increases the dilution valve gradually closes causing more oxygen to be provided to the facemask. The amount of added oxygen for a given atmospheric pressure can be accurately controlled at all altitudes due to the greater adjustment available in the device for calibration and operation compared to the current art. This greater operational capability eliminates the excess use of oxygen at low to intermediate altitudes as is common problem with the current art.

The invention relates to a method and a device for rapidly evaluating available capacity of a decommissioned lithium battery. The method comprises the following steps: S1) obtaining an SOC-OCV relationship curve and a charge-discharge curve of a new lithium battery having the same physical and chemical characteristics as the decommissioned lithium battery; S2) measuring an initial open circuit voltage UP of the decommissioned lithium battery and obtaining an initial SOC value of the decommissioned lithium battery according to the SOC-OCV relationship curve of the new lithium battery; S3) obtaining a charge-discharge curve of the decommissioned lithium battery; S4) calculating the available capacity C1 of the decommissioned lithium battery by utilizing an ampere-hour integral method and according to the initial SOC value and the charge-discharge curve of the decommissioned lithium battery, and calculating the available capacity C2 of the decommissioned lithium battery based on the charge-discharge curves of the new lithium battery and the decommissioned lithium battery and by utilizing a charge-discharge curve matching method; and S5) determining weights of the C1 and the C2 respectively based on the SOC-OCV curve, and fusing estimated values obtained through the two available capacity estimation methods to obtain a final capacity estimation result. Compared with the prior art,the method and device have the advantages of being accurate and fast and the like.

The invention provides a lithium-ion battery matching method and a lithium-ion battery matching system and relates to the technical field of lithium battery production technologies. The lithium-ion battery matching method comprises the steps of battery encoding, first battery grading, second battery grading, first normal temperature testing of batteries, second normal temperature testing of the batteries, internal resistance testing of the batteries and step matching of the batteries. The technical problems that a single-parameter matching method is single in basis and large in error, a multi-parameter matching method cannot present essential differences among the batteries and is poor in balance, and a method of combining the multi-parameter matching method with a charge-discharge curve matching method is complicated in operation process and low in production efficiency are solved. According to the lithium-ion battery matching method, the matched batteries are better in uniformity, the charge-discharge cycle performance is improved, furthermore, other parameters do not need to be tested in the scheme, the influence of the charged state is avoided during matching, and matching canbe carried out in the charged state of an arbitrary low-power battery pack.

This invention relates to one method to measure coating glass film optical parameters, which comprises the following steps: establishing film thickness h, reflection rate n, dissipation parameter k and film transparency rate and reflection rate function relationship; forming curve matching by real coat film glass visible transparency and reflection spectrum; solving the curve matching problem by analogue annealing and Newton iteration method to get the measurement results of film optical parameters.

An apparatus for and method of employing an electronic hearing aid device to assist a hearing impaired patient. The resonance curve of the outer auditory canal of the patient is determined. A device in accordance with the present invention is tuned to a frequency response curve which matches the measured resonance curve. The device is tuned by adjusting the overshoot of a low pass filter stage which is interposed between the microphone input and a class D output stage.

A check method of three-dimension spatial connecting rod curvature match degree comprises following steps that standardizing an object connecting rod curvature data, referring to the standard curvature, using wringing number and distance of sub section couple to divide all sub section couples into a plurality of equivalent classes, calculating out the rigid conversion between the sub section couples of different curvatures in each equivalent class, to find maximum match sub section couple to realize local match of curvature, cluster analyzing all rigid conversions, using the maximum cluster as the best match of connecting rod curvature, to obtain maximum rigid conversion, match degree and match error, to display match effect. The invention can effectively resolve the three-dimension spatial connecting rod curvature match problem.

System and method for determining the presence of an object of interest in a target image. Regions of a target image may be located that match an object of interest, e.g., in a template image, with respect to various information, e.g., luminance, color and / or other types of boundary information. The invention includes improved methods for mapping point sequences (e.g., pixel sequences) or curves to new point sets or curves for curve matching. The method determines the presence of an object of interest in a target image despite of or using various types of topological transformations of the object of interest in the target image. One or more mapping operators are determined based on template curves and / or example target curves. Pattern matching is performed on one or more target images using the mapping operator(s) to generate pattern matching results, and the pattern matching results output.

The invention provides a wind power plant power predication method. The method comprises the following steps: step A, collecting wind speed historical data of mesoscale numerical weather forecast and actually measured wind speed historical data matching the wind speed historical data in terms of time; B, matching wind speed historical data of mesoscale numerical weather forecast of a prediction day with the wind speed historical data of the mesoscale numerical weather forecast to obtain historical data with greatest similarity; C, determining a wind measurement tower actually measured wind speed matching the historical data with the greatest similarity in terms of time, and replacing the wind speed historical data of the mesoscale numerical weather forecast of the prediction day with the wind measurement tower actually measured wind speed; and D, establishing a fitting wind speed-power feature curve of a wind power plant area, and through combination with the wind measurement tower actually measured wind speed after replacement in the step C, obtaining predicted power of the wind power plant area at the predication day. According to the invention, compared to a conventional statistical scale-reducing method applying a nerve network, the wind power plant power predication method has the following advantages: the logic structure is optimized, and besides, a curve matching model also has the advantage of high execution efficiency.

A non-contact electricity verification device based on vertical field intensity difference distribution curve matching comprises a signal collecting unit, a data analysis unit and a signal transmission unit used for signal transmission between the signal collection unit and the data analysis unit. The signal collection unit comprises a sensing module, a filter module, a collection module and a collection control module, wherein the sensing module is used for measuring voltage signals of measured points on a measured path, and the voltage signals are filtered by the filter module in a low-pass mode, then transmitted to the collection module for analog-digital conversion and transmitted out through the collection control module. The data analysis unit comprises a display module, a man-machine interaction module, a data storage module and a control module. The data analysis unit stores a standard map and generates a measurement curve by calculation according to actual measurement data, matching recognition is carried out on the measurement curve and the standard map, and the electrification situation is judged. Whether an object to be tested is powered on or not can be judged by detecting the electric field intensity of the measured path, the operation process is simplified, and detection accuracy is improved.

The invention discloses a video clip method, which comprises the following steps: identifying an image in a template video to acquire template feature data; performing curve fitting according to the template feature data to acquire a first curve set; identifying images of multiple original materials to acquire multiple shooting feature data; performing curve fitting according to the multiple shooting feature data to acquire multiple second curve sets; matching the first curve set with the multiple second curve sets by features; performing curve transformation and video mapping according to amatching result to acquire clip materials; and synthesizing the clip materials into a roughly clipped video according to the template video. The video clip method disclosed by the invention achieves automatic video clipping according to curve fitting, curve matching, curve transformation and vide mapping, and improves the clip efficiency.

The invention relates to a curve matching visual navigation method for planet landing in an unknown environment and belongs to the technical field of deep space exploration. An implementation method includes first establishing a lander kinematics model by combining inertial measurement information, and then obtaining a sequence image in the lander descending process to establish a measurement model based on inter-frame curve matching, and finally performing real-time estimation on an absolute motion state of a lander through a Kalman filter algorithm, thereby achieving the curve matching visual navigation for planet landing in the unknown environment. The accuracy of a navigation system is improved, the stability of the navigation system is ensured, and it is ensured that the lander landsaccurately and safely. The absolute motion state of the lander can be estimated without prior map information, and the stability of the navigation system is improved. The curve matching visual navigation method not only is suitable for planetary landing missions, but also suitable for small celestial body landing missions.

The invention relates to a power lithium battery deterioration degree diagnosis method based on AC impedance. The method comprises steps that, a power lithium ion battery AC impedance base curve database is established, and an AC impedance curve of a to-be-detected power lithium ion battery is acquired and is analyzed to acquire charge transmission impedance of the to-be-detected power lithium ion battery. According to the method, the AC impedance curve of the to-be-detected power lithium ion battery is acquired, combining an intelligent curve matching model, intelligent matching of the power lithium ion battery AC impedance base curve database is carried out to acquire a corresponding battery deterioration degree, further combining a charge transmission impedance model, the battery deterioration degree is acquired, and the battery deterioration degree is finally outputted through an integrated evaluation model. Through the power lithium battery deterioration degree diagnosis method, the battery deterioration degree can be acquired, optimization use of the power lithium battery can be guided, the utilization rate of the power lithium battery can be improved, and service life of the power lithium battery is prolonged.

Improved frequency drift and phase error compensation in a VOFDM receiver. The invention is operable to compensate for frequency drift and phase error within a window that may include a single frame, a sub-frame, or multiple frames. The compensation is performed after having performed estimation of the phase within the particular window; any phase error and frequency drift may be identified and an appropriate form of compensation may be identified to perform curve fitting of the phase within the compensation window. The curve fitting of the phase is performed using linear techniques in one embodiment; an average phase and appropriate slope / ramp are calculated to match the phase as accurately as possible. Other alternative compensation techniques may also be performed, including higher order curve matching techniques. The receiver is operable to perform any necessary compensation before passing the now-compensated data to a symbol processing functional block.

System and method for determining the presence of an object of interest in a target data set. Portions of a target data set may be located that match an object of interest, e.g., in a template data set, with respect to various information, e.g., edge or boundary information. The invention includes improved methods for mapping point sets or curves to new point sets or curves for curve matching. The method determines the presence of an object of interest in a target data set despite of or using various types of topological transformations of the object of interest in the target data set. One or more mapping operators are determined based on template curves and / or example target curves. Pattern matching is performed on one or more target data sets using the mapping operator(s) to generate pattern matching results, and the pattern matching results output.

The invention discloses a module Gamma correction method and system based on curve matching. The method comprises the following steps: establishing a reference Gamma curve function by acquiring a modulation coefficient, a modulation index and a deviation value of a reference module; under the reference binding point, obtaining a predicted deviation value of the to-be-corrected module by utilizingthe register reference modulation value, the register modulation value of the to-be-corrected module and the deviation value of the reference module; constructing a predicted Gamma curve of the to-be-corrected module by utilizing the modulation coefficient of the reference module, the modulation index of the reference module and the predicted deviation value of the to-be-corrected module; obtaining register prediction initial values under all binding points by utilizing the prediction Gamma curve of the to-be-corrected module; performing gamma correction on the to-be-corrected module by usingthe register prediction initial values under all the binding points, so that the accuracy of the module Gamma correction initial value is improved, the Gamma correction adjustment frequency is reduced, and the Gamma correction efficiency of the module is improved.

A power supply curve matching one of the patterns of a demand curve stored in advance is created by combining power generation quantities of various power sources. An environmental load index to a supply quantity indicated by the supply curve is calculated based on environmental load information stored in advance. Next, reducible quantity information for each power consumption reduction characteristic of each consumer is stored in advance, a necessary reduction quantity to cause the supply curve to match a predetermined curve is calculated. A reducible supply quantity is calculated based on reducible quantity information, and a reducible index obtained by dividing the reducible supply quantity by the necessary reduction quantity is calculated. Next, the supply curve is adjusted until it is determined that both environmental load index and the reducible index are within respective certain ranges.

System and method for estimating a rotational shift between a first discrete curve and a second discrete curve, where the second discrete curve is a rotationally shifted version of the first discrete curve. First and second discrete curves are received. A rotational shift between the first discrete curve and the second discrete curve is estimated based on the first discrete curve and the second discrete curve. A cumulative rotational shift is updated based on the estimated rotational shift. A rotationally shifted version of the second discrete curve is generated based on the cumulative rotational shift. The estimating, updating, and generating are performed in an iterative manner using the respective rotationally shifted discrete curve for each iteration until a stopping condition occurs, thereby determining a final estimate of the rotational shift between the first discrete curve and the second discrete curve. The final estimate may be used to perform curve matching.

The invention discloses a point cloud relative pose estimation method based on three-dimensional curve matching. The method includes the steps that the edge contours of two frames of input point clouds are extracted, and three-dimensional point sets (img file='dest_path_image 002. TIF' wi='13' he='16' / ) and (img file='dest_path_image 004. TIF' wi='14' he='16' / ) on behalf of the three-dimensional edge contour curve are obtained; according to the three-dimensional point sets (img file='915081 dest_path_image 002. TIF' wi='14' he='17' / ) and (img file='301063 dest_path_image 004. TIF' wi='14' he='16' / ), orderly point sets (img file='dest_path_image 006. TIF' wi='26' he='20' / ) are obtained through extraction; each orderly point set (img file='dest_path_image 008. TIF' wi='14' he='20' / ) or (img file='dest_path_image 010. TIF' wi='15' he='21' / ) is decomposed, each subset is on behalf of one arc section after decomposition, and a feature description vector of each arc section is established; the feature description vectors of the edge curve arc sections of the two frames of point clouds are matched to establish a matching relation, and the relative pose transformational matrixes (img file='dest_path_image 012. TIF' wi='39' he='18' / ) of the two frames of point clouds are calculated. The point cloud relative pose estimation method based on three-dimensional curve matching does not depend on an initial pose, only an environmental contour is used for matching, and the relative pose is estimated; only the edge point sets are processed, and calculation is lowered; the method can be suitable for chaff interferent in which point clouds exist.

The invention discloses a cooking appliance and a cooking control method and device thereof. A weighing device is arranged in the cooking appliance. The method comprises: acquiring a rice amount in the appliance body and a water amount in the appliance body by the weighing device; according to the rice amount and the water amount, acquiring a rice and water amount level A of the cooking appliancein current cooking; controlling the cooking appliance to start cooking, acquiring a temperature change rate in the cooking appliance, and acquiring a rice and water amount level B of the cooking appliance in current cooking based on the temperature change rate; determining whether an absolute value of the difference between the A and the B is less than a preset threshold; if so, determining that the rice and water amount level of the cooking appliance in the current cooking is A and carrying out heating cooking controlling based on a heating curve matching the rice and water amount level A. Therefore, the rice-water ratio in actual cooking by the user can be determined effectively and thus cooking is carried out by using the heating curve matching the rice-water ration, so that the cookingeffect is good.

The invention relates to a curve automatic matching method based on gray subset division, which comprises the following steps: acquiring an image and inputting the image into a computer, extracting a curve section in the image, determining a curve supporting area, carrying out subset division on the curve supporting area, calculating feature vectors of each point in the supporting area, calculating sub-area mean-value description vectors and standard deviation description vectors and calculating a curve matching descriptor and carrying out curve matching. The method provided by the invention has the benefits that the problem of image deformation sensitiveness in the existing method can be overcome, and the matching performance is better.

Present invention refers to a method for overcoming salt rock layer creepage utilizing drilling fluid density and chlorides concentration relationship concentration relationship. It contains 1, to make hole boring with sampling and test sample processing, 2, taking four experiment test samples, to proceed creep test to each test sample, taking multiple level temperature and multiple level loading compound experiment mode to obtain creep test straining and timetable, 3, establishing salt rock creepage constitutive relation equation i.e. creep stress-rate of strain relation equation through curve matching method, 4, establishing well bore necked-in rate and drilling fluid density relation equation,5, taking the rest of four test samples, to proceed salting in experiment, corresponded salting in dissolution rate and chlorides pH indicator relation curve, establishing salting in rate and chlorides pH indicator relational model through nonlinear regression, 6, establishing drilling fluid density, temperature and chlorides pH indicator graph of relation edition, determining rational drilling fluid density and chlorides concentration to overcame salt bed creepage according to steps 6 graph of relation edition to salt bed well drilling in same zone block with experiment well core.

In a method of processing red eye in digital images, a skin area is first determined in an image. Then all inner boundaries within the skin area are picked up. The inner boundaries are matched with an eyelid quadratic curve to determine the location of the eyelid area. Red pixels within the eyelid area are then detected and filled up. A quadratic curve model can be further used to localize an iris area within the eyelid area to improve the precision of red eye localization as well as the processing speed.