48results about How to "Achieve accurate positioning" patented technology

The invention discloses a high-fineness urban three-dimensional modeling method and relates to the field of three-dimensional digital urban construction, airborne LIDAR (light detection and ranging) is adopted for acquiring original aerial survey data result, and an urban high-precision digital elevation model, a digital orthophoto map and a building three-dimensional body frame model are manufactured on the basis, thereby forming a foundation framework of an urban three-dimensional scene; then a vehicle-mounted movable laser scanning device is used for acquiring vehicle-mounted movable laser scanning original data result, and a high-fineness model of all types of opuscules and ground objects of an urban is acquired by performing the ground object high-fineness three-dimensional modeling under the mode of fusing vehicle-mounted point cloud after precision optimization with a photo according to a ground object parameter model base under the three-dimensional modeling environment; and the foundation framework of the urban three-dimensional scene and the high-fineness model of all the types of the opuscules and the ground objects of the urban are integrated, thereby acquiring a high-fineness three-dimensional virtual urban scene of the urban. With the adoption of the method, production efficiency is improved, project cost is reduced, development cycle is shortened, modeling fineness is improved, and actual application needs can be met.

The invention discloses a method for positioning a key feature point, which comprises the following steps: detecting a face in a target image and determining the face area in the target image as an image to be aligned; extracting the edge information in the image to be aligned to obtain an edge graph of the image to be aligned; detecting all candidate feature points from the edge graph according to a pre-set feature point selecting standard; and selecting a plurality of candidate feature points with the highest match degree with a set reference feature point from the candidate feature points to serve as the finally obtained key feature points. The invention further discloses a device for positioning the key feature point, which comprises an image to be aligned determining module, an edge graph acquiring module, a candidate point determining module and a key feature point determining module. The method and device of the embodiment of the invention can accurately position the key feature point in the face area, and the algorithm of the scheme has the advantages of simplicity, small calculation amount and fast implementation.

The embodiment of the invention provides a network quality monitoring method and a server, relates to the field of Internet, and aims to monitor and show the network quality of a whole network and subnets, highlight objects with severe problems and solve the problem of the need of repeated skip during checking of alarm information and performance indexes. The method comprises the following steps: displaying all regions on a map, highlighting deteriorated regions, and sequentially displaying the KPI (Key Performance Indicator) of each region to form transverse comparison among the regions; displaying alarm information according to time intervals and highlighting unprocessed alarms; displaying alarm object information, alarm basic information, a physical path where an alarm object is positioned and the alarm object in KPI displaying in a time interval to be inquired in a centralized manner; and displaying service paths on the map, wherein segmented paths in each service path can be displayed. The embodiment of the invention is applied to monitoring of the network quality of the whole network and the subnets.

The invention discloses an omnidirectional intelligent mobile equipment positioning and navigation method based on laser ranging, which comprises the following steps: installing a sensor on an AGV, and measuring the distance from the center of the sensor to the center of the AGV; installing a laser reflector in the AGV operating site; setting the initial origin and zero angle of the sensor, usinga navigation controller to collect the real-time pose information of the sensor and filter it to obtain the current pose information of the sensor; obtaining the current pose information of the body center of the AGV through a conversion formula; and when the AGV performs patrol running, timely solving the deviation of the current pose information of the body center of the AGV from the target path, and timely adjusting the angular velocity and the yaw angle of the AGV according to the deviation to complete the navigation. The method arranges the sensor and the laser reflector, solves the deviation of the AGV pose and the target path in real time, and adjusts the AGV according to the deviation in real time, thereby realizing the flexible setting of the AGV running route and accurate navigation, and making up defects of the traditional laser navigation AGV positioning method that the path is single and the reliability is poor.

The embodiment of the invention discloses a method for processing electricity consumption data of consumers. The method comprises the following steps: acquiring electricity consumption features of each consumer, an then clustering the consumers according to the electricity consumption features of each consumer, so as to acquire a plurality of clusters; acquiring the objective cluster in which the objective consumer is located; acquiring a cluster index of the objective cluster; according to an industry index of the industry in which the objective consumer is located and the cluster index of the objective cluster, acquiring the same industry benchmarking index of the objective consumer, and thus optimizing the electricity consumption of the objective consumer according to the same industry benchmarking index. According to the embodiment of the invention, the electricity consumption features of each consumer are extracted from the electricity consumption data of the consumers and then clustered, so that accurate positioning of the personal features of the objective consumer is realized; by virtue of acquiring the same industry benchmarking index of the objective consumer, comprehensive comparison is performed on the objective consumer, other similar consumers and related industry indexes, so that quantitative evaluation can be better performed on an optimized electricity consumption scheme during subsequent processing, and the accuracy and applicability of optimized electricity consumption can be improved effectively.

The invention discloses a high-precision three-dimensional city modeling method, and relates to the field of modeling. The method is characterized in that firstly high-precision three-dimensional laser point cloud and high-resolution digital aerial photos of a measurement area are acquired by using airborne LIDAR, and high-precision digital elevation models and digital orthoimages are rapidly extracted and high-precision modeling of buildings is performed so that a three-dimensional city electronic sand table and three-dimensional building object frame model scenes are manufactured; secondly, acquisition of the highly dense laser point cloud and the high-resolution digital photos of the city scenes on the both sides of the measurement area is completed by using vehicle-mounted mobile laser scanning measurement, vehicle-mounted data quality optimization is performed by reference to the airborne LIDAR result and then three-dimensional modeling is rapidly performed on various types of sketch elements of the city; and finally the three-dimensional digital model results acquired by airborne LIDAR and vehicle-mounted mobile laser scanning measurement are integrated so that the quality and the working efficiency of three-dimensional city modeling can be greatly enhanced, and the project development cost can be greatly reduced.

The invention discloses a smart archives based on big data, and relates to the technical field of archives management applications. By constructing the archives information resource library, and using the data of the archives information resource library as the connection link of each subsystem, each subsystem provides a special scene service for the archives management application, and realizes the intelligent management and control of the archives, the accurate positioning of the archives, and the Enhanced reading experience and intelligent use of archive data, thereby realizing the standardization, refinement, transparency, and intelligence of the archives digitization process, and the rapid, accurate, and diversified archive retrieval. At the same time, it also realizes the centralized archiving of archive data Management, business application topic classification, data clustering management, document content management and application, global control and intelligent application of cross-departmental data collaboration applications.

The invention relates to the technical field of robot simultaneous positioning and map construction. The invention relates to the field of SLAM detection, in particular to a semantic information fusedvisual SLAM loopback detection method and device. The method comprises the steps of obtaining a video stream image, then offline extracting a key frame from the video stream image, detecting an object-level image in the key frame, extracting features of the object-level image, then matching the features of the object-level image, and carrying out loop-back detection on the key frame, and has invariance on illumination, so that accurate positioning and map construction of a robot are realized.

The application discloses a distribution network fault positioning method and device. The method includes the steps of obtaining a possible fault line set J, according to a possible fault line set JLof observable lines at monitoring points and a possible fault line set JV determined based on upstream and downstream directions of a voltage sag source; according to the possible fault line set J, extracting a first monitoring point of the lowest amplitude of three-phase voltage amplitudes of the monitoring points to determine a fault type of the first monitoring point; according to the possiblefault line set J and the fault type of the first monitoring point, determining the fault distance between an undetermined fault point and the first monitoring point and the fault resistance of the undetermined fault point; establishing a fault positioning model according to the voltage of each phase of each monitoring point, the fault distance and the fault resistance; and according to the fault positioning model, constraints, and a particle swarm algorithm, determining the fault point. Thus, accurate positioning of the fault point is achieved and the fault finding efficiency is improved.

The invention provides a mobile Internet palm print identity authentication method which includes the stage of registration and the stage of identification. In the stage of registration, a camera built in an intelligent mobile device is used for obtaining a palm print image of a user who needs to register and the palm print image is uploaded to a server. The server end stores the information of the user into a database by means of palm positioning and a series of algorithms such as extracting of areas of interest and extracting of palm print features. In the stage of authentication, the camera built in the intelligent mobile device is used for obtaining the palm print image of a user and the palm print image is uploaded to the server. The server end obtains palm print features of the user to be authenticated through the same algorithms and matches the palm print features with the palm print features stored in the database, and therefore whether the user is the registered user or not can be judged. According to the mobile Internet palm print identity authentication method, the defect that a traditional palm print identification device is not convenient to carry along is overcome, limitation by the hardware performances of the intelligent mobile device is avoided, meanwhile, the cores of the algorithms are deployed onto the server, safety of the system is reinforced and the application fields of palm print identification are greatly widened.

The invention discloses a product analysis method, system and device and a medium, and relates to the technical field of intelligent manufacturing and artificial intelligence, and the method comprises the steps: carrying out the training of cleaned and preprocessed data, and obtaining a classification prediction model; obtaining a predicted value of each production process parameter in the to-be-analyzed data by using the classification prediction model; and calculating and obtaining the SHAP value of each production process parameter based on the predicted value of each production process parameter. According to the method, the names of a plurality of key process links and a plurality of key production process parameters which influence the product quality can be accurately and quickly obtained based on the SHAP value of each production process parameter.

The invention provides a video-on-demand method, a client and an electronic device, which are applied to the technical field of internet. According to the method, I frames in a target video can be used for independently parsing corresponding video images, and the characteristic of using any I frame as a starting point of playing is combined; after the video positioning time of the target video isacquired, if a preview image corresponding to the video positioning time exists, the preview image is obtained and display; if a playing command is received within a preset time period during which the preview image is displayed, playing the content of the target video from the I frame corresponding to the preview image. After the method is adopted, all preview pictures seen by a user are generated according to the parsing of the I frames, the playing of video programs also starts from the I frames corresponding to the preview images, and the preview picture seen by the user is the video imagefrom which the video is started to play, so that the playback content is accurately located, the target video is enabled to be started to play from the content corresponding to the preview image selected by the user, and the user experience is improved.

The invention discloses a multimedia data playing method and apparatus. The method comprises: a first multimedia file is played in a playing interface, wherein indication information of a second multimedia file is also displayed in the playing interface; when the first multi-media file is played, a first playing request for making a request of playing the second multi-media file is received is determined; if so, the second multi-media file indicated by the first playing request is played in the playing interface and playing of the first multi-media file is stopped. With the method and apparatus, a technical problem that flexibility is low because multi-media data is played before a video fixedly in the prior art can be solved.

The embodiment of the invention provides a store arrival prediction method and device, a readable storage medium and electronic equipment. The method comprises the steps of obtaining a search requestinitiated by a user terminal; performing feature extraction on the search request, and determining features of a user of the user terminal, features of each store in a store list corresponding to thesearch request and user-store cross features; inputting the characteristics of the user, the characteristics of each shop and the user-shop cross characteristics into a pre-trained shop arrival probability prediction model, and determining the probability that the user arrives at each shop; and determining whether the user arrives at a target store or not according to the probability that the userarrives at each store. According to the invention, the target store to which the user arrives is determined according to the probability of each store output by the store arrival probability prediction model, so that accurate positioning of the current position of the user is realized, and the reliability of the stores near the current position recommended to the user by the user terminal is improved.

The invention provides an aircraft landing gear state judgment method based on image recognition, and the method comprises the following steps: 1), continuously collecting an aerial target image through an image collection module erected on an aircraft runway; 2) identifying an airplane and the position of the airplane in the aerial target image by adopting an airplane identification model; 3) acquiring the flight state of the aircraft according to the group of image sequences obtained in the step 2); 4) extracting an aircraft image from the aircraft identification result; 5) identifying the undercarriage in the aircraft image by adopting an undercarriage identification model; 6) extracting an undercarriage image from the undercarriage recognition result, and 7) comprehensively judging whether the folding and unfolding state of the undercarriage is correct or not by combining the flight state of the aircraft and the undercarriage image. According to the invention, through accurate identification of the aircraft landing gear and in combination with the aircraft flight state, state judgment of the landing gear is effectively achieved, and the accuracy and stability of detection are improved.

The invention relates to a natural gas pipeline safety monitoring key technology based on acoustic pulse compression, and belongs to the field of pipeline safety monitoring. The process comprises the following steps that a linear frequency modulation pulse acoustic wave signal is transmitted into a pipeline, a reflection signal is received by a sensor, and is transmitted to an upper computer through a data acquisition card for related data processing, wherein the data processing process comprises the following steps that firstly, matching filtering, envelope extraction and difference value calculation are performed on the collected signal firstly, and then the time difference between the transmission signal and the reflection signal in a difference value curve is calculated so that positioning of the hydrate blockage or the pipeline leakage can be realized. The natural gas pipeline safety monitoring key technology has the main advantages that the positioning precision is high, the real-time performance is good, the system monitoring range is wide, the spatial resolution is high, effective compression of the signal can be realized through the pulse compression technology, the contradiction between the system spatial resolution and the monitoring distance is solved, real-time dynamic monitoring of the hydrate generation process can be realized through the difference value algorithm, and severe noise pollution can be effectively inhibited through the matching filtering technology.

The invention discloses an occluder for heart septal defects. The occluder comprises a supporting frame, an upper positioning body, a lower positioning body, an upper liquid catheter, a lower liquid catheter, a plug, a sheath shell, a screw rod, two liquid feeding pipes, two puncture needles and a shaft sleeve, wherein a containing groove with an opening in the bottom end is arranged at the middle part of the supporting frame; the upper positioning body and the lower positioning body are arranged on the outer wall of the supporting frame at interval; the upper liquid catheter and the lower liquid catheter are arranged in the containing groove, and are respectively communicated with the upper positioning body and the lower positioning body; the plug is clamped at the opening of the containing groove and is provided with two liquid passing pipes which are respectively clamped into the upper liquid catheter and the lower liquid catheter; a sliding hole is formed in the middle part of the sheath shell; the screw rod is arranged in the sliding hole in a sliding manner, and the middle part of the screw rod is provided with installing holes provided with the two liquid feeding pipes; the two puncture needles are respectively arranged at the end parts of the two installing holes, and are respectively communicated with the two liquid feeding pipes; the shaft sleeve is rotatably arranged on the sheath shell, and the inner wall of the shaft sleeve is provided with inner threads meshed with outer threads of the screw rod.

The invention discloses an electrochemical high-flux testing method based on a photolithographic mask and a micro liquid tank and a device and relates to the technical field of metal corrosion, microcell electrochemistry and systematic data accumulation application. The device comprises a micro liquid tank testing system, a testing liquid updating system, a high-precision XYZ three-dimensional moving platform, a microscopic monitoring system, an electrochemical testing system, a storage and control system and a connection system, wherein the connection system is used for controlling instructions and testing data to be effectively transmitted among the systems. Due to modular design, the device is high in expandability; with the combination of a photolithographic mask technique and the micro liquid tank testing system, and a high-flux idea, the reaction area of a working electrode is precisely controlled, a high solution amount / working electrode reaction area ratio is achieved, influence of reaction products is reduced, seam corrosion is eliminated, risks of liquid leakage, blocking and oxygen diffusion are reduced, relatively low solution resistance is achieved, mask graphs and micro-tube sizes can be selected according to demands, high-flux and automatic measurement on microcell electrochemistry are achieved, and the measurement and analysis efficiency are improved.

The invention provides a positioning method and device, a storage medium and an electronic device. The method comprises the steps: respectively determining the positioning information identified by afirst positioning graph and a second positioning graph in a preset coordinate system, and obtaining the first positioning information and second positioning information, wherein the first positioninggraph and the second positioning graph are positioning images obtained in different modes in the same scene; fusing the first positioning information and the second positioning information to obtain third positioning information; and performing positioning based on the third positioning information. According to the invention, the problem that a certain piece of positioning information is invalidor the positioning precision is poor in a part of scenes is solved, and an accurate positioning effect is achieved.

The invention provides a vehicle key positioning method and device, and equipment. The vehicle key positioning method comprises the steps: obtaining the vehicle position data at the last moment from the moving track data of a vehicle, and enabling the vehicle position data to serve as the starting point position data of a key; detecting the validity of a satellite positioning system in the key inreal time, and when the satellite positioning system fails, determining and storing the position data of the key at the current moment in a memory according to the movement data collected by a sensormodule in the key at the current moment and the position data of the key at the last moment; when the satellite positioning system is valid, determining the position data of the key at the current moment according to the positioning data acquired by the satellite positioning system at the current moment and the moving data acquired by the sensor module, and storing the position data in the memory;and generating a key track according to the starting point position data of the key and the position data corresponding to the multiple moments, and positioning the key according to the key track. Therefore, when the satellite positioning system fails, the key can be accurately positioned.

The invention discloses a remote positioning operation control system of an unloading vehicle. The remote positioning operation control system comprises a driving mechanism, radar material meters (1),a scale ruler system (2), a wireless communication module and a control center, wherein the radar material meters (1) are arranged in material bins and are used for collecting material levels in thematerial bins; the scale ruler system (2) is used for collecting positions of the unloading vehicle; the control center is connected with the radar material meters (1), the scale ruler system (2) andthe driving system through the wireless communication module is used for controlling the driving mechanism to adjust the positions of the unloading vehicle according to the collected material levels so as to unload. The remote positioning operation control system of the unloading vehicle overcomes the problem of the manual field operation at the present stage and achieves the electric remote operation of the unloading vehicle.

The invention discloses an occluder for heart septal defects. The occluder comprises a supporting frame, an upper positioning body, a lower positioning body, an upper liquid catheter, a lower liquid catheter, a plug, a sheath shell, a screw rod, two liquid feeding pipes, two puncture needles and a shaft sleeve, wherein a containing groove with an opening in the bottom end is arranged at the middle part of the supporting frame; the upper positioning body and the lower positioning body are arranged on the outer wall of the supporting frame at interval; the upper liquid catheter and the lower liquid catheter are arranged in the containing groove, and are respectively communicated with the upper positioning body and the lower positioning body; the plug is clamped at the opening of the containing groove and is provided with two liquid passing pipes which are respectively clamped into the upper liquid catheter and the lower liquid catheter; a sliding hole is formed in the middle part of the sheath shell; the screw rod is arranged in the sliding hole in a sliding manner, and the middle part of the screw rod is provided with installing holes provided with the two liquid feeding pipes; the two puncture needles are respectively arranged at the end parts of the two installing holes, and are respectively communicated with the two liquid feeding pipes; the shaft sleeve is rotatably arranged on the sheath shell, and the inner wall of the shaft sleeve is provided with inner threads meshed with outer threads of the screw rod.

The invention relates to an accurate fault positioning method for a petal-type power distribution network containing an inverter distributed power supply, and the method comprises the steps: carrying out the fault characteristic analysis of the petal-type power distribution network containing the inverter distributed power supply, and carrying out the fault positioning of the petal-type power distribution network containing the inverter distributed power supply through employing a current incidence relation between two ends of a main line of a single petal ring network and a same bus, a foundation is laid for simply, effectively and accurately positioning a fault position; secondly, no matter a symmetric fault or an asymmetric fault occurs, the method can accurately realize fault positioning, and is not influenced by a fault type, an inversion type distributed power supply and a transition resistor; and finally, accurate fault positioning can be realized only after the centralized information processing center receives the positive sequence and negative sequence current steady-state values of each protection on the main line, a traveling wave measuring device and the like do not need to be additionally arranged, and the method has the characteristics of small required communication traffic, low information synchronism requirement and the like, and is reliable in performance, simple and easy to implement.