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35results about How to "Data rich" patented technology

Car-following trajectory dynamic acquisition method and system

The invention discloses a car-following trajectory dynamic acquisition method and system. The trajectory of a front car is obtained by collecting the trajectory of a rear car and the distance between the front and rear cars, wherein the distance between the front and rear cars is calculated based on images shot by a binocular camera mounted on the top of the rear car. The method mainly comprises the following steps: carrying out distortion correction and stereo correction on original images shot by the binocular camera; selecting a target area in one image, and realizing automatic matching of targets in two images based on a template matching algorithm; carrying out calculation according to the triangulation principle to obtain the distance between the actual target area and the binocular camera; keeping the original images shot by the binocular camera, shooting time and the distance corresponding to the target front car; and when carrying out target distance acquisition at the next moment, automatically tracking the target area in the image in the next moment through a target automatic tracking algorithm. The car-following trajectory dynamic acquisition method and system are low in equipment cost, high in data acquisition precision, high in applicability, rich in data content and simple in operation and have a good application prospect in the traffic data acquisition field.
Owner:南京阿尔特交通科技有限公司

Geographic area classification method and device, electronic device and storage medium

The invention provides a geographic area classification method, a geographic area classification device, an electronic device and a computer readable storage medium, and belongs to the technical fieldof computers. The method comprises the following steps: acquiring multiple groups of travel data in a target geographic area, wherein the travel data comprises a departure position, departure time, an arrival position and arrival time; based on the sub-areas where the departure position and the arrival position are located, respectively obtaining initial function vectors of the departure positionand the arrival position, and obtaining the sub- areas by dividing a target geographic region in advance; taking the travel data, the function vector of the departure position and the function vectorof the arrival position as training data, and updating the function vector of the departure position and the function vector of the arrival position by training a neural network model; and clusteringthe function vector of each departure position and the function vector of each arrival position in the travel data so as to perform function classification on one or more sub-regions in the target geographic region. According to the invention, the geographic areas can be effectively classified.
Owner:北京京东智能城市大数据研究院

Scientific and technological resource dynamic collaborative filtering recommendation method based on user group preferences

The embodiment of the invention provides a scientific and technological resource dynamic collaborative filtering recommendation method based on user group preferences. The method comprises the following steps: calculating the similarity among users according to the label similarity among the users and the score similarity of the users on scientific and technological resources; clustering the users, and constructing a category preference matrix of the science and technology resources; calculating the category preference similarity of the user to the target science and technology resources and other science and technology resources, and generating a candidate neighbor list of the target science and technology resources; calculating score similarity between each science and technology resource and a plurality of previous science and technology resources, and generating a science and technology resource nearest neighbor list; taking the science and technology resources which are not scoredby the user as to-be-predicted science and technology resources, and calculating prediction scores of the to-be-predicted science and technology resources. In this way, the score data can be predicted by analyzing the score of the similar user group of the target user, and the generated recommendation result is highly consistent with the interest matching degree of the target user.
Owner:北京市科学技术情报研究所

System and method for user data transmission of satellite mobile communication system

ActiveCN104202078ASolve the difficult problem of remote managementRealize remote tracking functionRadio transmissionData compressionData display
The invention discloses a system and a method for user data transmission of a satellite mobile communication system. The method includes that a satellite mobile communication terminal fills trace data into signaling messages which are transmitted to a ground monitoring terminal through a satellite signaling channel. The system comprises a satellite, the ground monitoring terminal, a satellite earth station and the satellite mobile communication terminal. The ground monitoring terminal comprises a trace data receiving module, a data analysis module, a trace data display module and a control command sending module; the satellite mobile communication terminal comprises a trace data collector, a trace data packaging module, a trace data compression module, a signaling packaging module and a message transceiving module. The trace data packaging module is used for packaging the acquired trace data; the trace data compression module is used for compressing the packaged data; the signaling packaging module is used for filling the compressed trace data into the signaling messages; the message transceiving module is used for sending the trace data and control commands. The system and the method for user data transmission of the satellite mobile communication system have the advantages that occupancy of traffic channels is avoided, adoption of a charge system of a network operator is avoided as well, and a remote tracking function is realized.
Owner:CHENGDUSCEON TECH

Network communication method and device and storage medium

The invention provides a network communication method, a network communication device and a storage medium, which are used for reducing the number of data packets in a communication network and improving the data transmission efficiency. The network communication method is applied to a video monitoring system, comprises master equipment and slave equipment, and comprises the following steps: the master equipment sends a data packet to the slave equipment, and the data packet comprises a start character, a data length, data content, summation check and an end character and is used for transmitting 0-255 bytes of data; the master equipment receives a response data packet sent by the slave equipment, the response data packet comprises an error response data packet and a correct response datapacket, the response data packet is sent by the slave equipment according to a decoding result of the data packet, if the slave equipment decodes successfully, the correct response data packet is sentto the master equipment, and a correct response code is carried in the correct response data packet; and if the slave equipment fails to decode and confirms that the data packet is the data packet sent to the slave equipment by the master equipment according to the address code carried in the data packet, an error response data packet is sent to the master equipment, wherein the error response data packet carries an error response code.
Owner:11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP

Visualization method and device for water productivity of land parcels

The invention provides a plot moisture productivity visualization method and device, and relates to the technical field of remote sensing, and the method comprises the steps: obtaining image data of a research plot, and carrying out the preprocessing of the image data, and obtaining first data; substituting the first data into a formula net water consumption = precipitation-evapotranspiration + irrigation volume for grid calculation to obtain a net water consumption layer; calculating the GEP of the research plot according to a GEP accounting standard and performing visualization processing to obtain an ecological system total production value layer; and substituting the result into a formula water productivity = ecological system total production value map layer/net water consumption map layer for grid calculation to obtain a water productivity image of the research plot. According to the technical scheme, the moisture productivity is defined as the ratio of the total production value of the ecological system to the net water consumption, and the originally defined crop yield and economic value thereof are included, so that the moisture productivity calculated in the scheme can reflect the efficiency of all aspects of the whole ecological system, and the data content reflected by the calculated result is more comprehensive.
Owner:杭州领见数字农业科技有限公司

Multilevel sliced sheet processing method for vector map data

The invention discloses a multilevel slice processing method for vector map data, which comprises multilevel slice generation step and map synthesis step; wherein, (1) the multilevel slice generation comprises the steps as follows: firstly, the map can be divided into four equal parts at L level (wherein, the L equals to the whole number from 1 to m), so as to obtain an L-level square area; and then the elements which are intersected with the L-level square area with the L weighing rank or partnership level can come under to <the multilevel slice data set>. When the detail data of the elements are excessive, the elements come under one group of the multilevel slice by utilizing the increment method; (2) the synthesis of an area A map under the L-level scale comprises the steps as follows:firstly, the congregation which is intersected with the area A and is composed of the L-level slice can be searched; then, the elements or the increment of the slice and the former slice thereof can be integrated; finally, the elements can be spliced together according to the space proximity relation so as to obtain the whole map. In the position service, the multilevel slice can be taken as a map data transmitting unit, so as to be good for one side of a mobile termination to cache the map data and reduce the data communication amount; and the increment process for the detail data can reducethe calculation load of the mobile termination.
Owner:NAT UNIV OF DEFENSE TECH

Canny operator-based foam boundary recognition and grain size analysis method

The invention discloses a Canny operator-based foam boundary recognition and grain size analysis method, which is characterized by comprising the following steps of: after calling an image, selecting between circular foam recognition and noncircular foam recognition according to the state of foams; graying an original drawing in the circular foam recognition; then, on one hand, performing logarithmic enhancement and critical binarization processing on a gray-scale drawing, on the other hand, introducing a Canny operator to recognize foam boundary in the gray-scale drawing and performing expansion processing, and finally superposing the two drawings and connecting lines of the foam boundary; performing Laplace enhancement processing on the original drawing in the noncircular foam recognition, introducing the Canny operator to extract the boundary of the foam, recognizing an identification mark step by step by repeatedly using corrosion, scanning, segmentation and filling and finally connecting the lines of the foam boundary; and finally obtaining a grain size analysis report. According to the method, the foams with small boundary and background contrast can be recognized, the calculation complexity is low, and the speed is high; and the method is suitable for objects such as fire extinguishing foams, floatation foams and well drilling foams.
Owner:应急管理部天津消防研究所

Geographical area classification method and device, electronic equipment, storage medium

The invention provides a geographic area classification method, a geographic area classification device, an electronic device and a computer readable storage medium, and belongs to the technical fieldof computers. The method comprises the following steps: acquiring multiple groups of travel data in a target geographic area, wherein the travel data comprises a departure position, departure time, an arrival position and arrival time; based on the sub-areas where the departure position and the arrival position are located, respectively obtaining initial function vectors of the departure positionand the arrival position, and obtaining the sub- areas by dividing a target geographic region in advance; taking the travel data, the function vector of the departure position and the function vectorof the arrival position as training data, and updating the function vector of the departure position and the function vector of the arrival position by training a neural network model; and clusteringthe function vector of each departure position and the function vector of each arrival position in the travel data so as to perform function classification on one or more sub-regions in the target geographic region. According to the invention, the geographic areas can be effectively classified.
Owner:北京京东智能城市大数据研究院

User data transmission method and system of satellite mobile communication system

ActiveCN104202078BSolve the difficult problem of remote managementRealize remote tracking functionRadio transmissionData compressionData display
The invention discloses a system and a method for user data transmission of a satellite mobile communication system. The method includes that a satellite mobile communication terminal fills trace data into signaling messages which are transmitted to a ground monitoring terminal through a satellite signaling channel. The system comprises a satellite, the ground monitoring terminal, a satellite earth station and the satellite mobile communication terminal. The ground monitoring terminal comprises a trace data receiving module, a data analysis module, a trace data display module and a control command sending module; the satellite mobile communication terminal comprises a trace data collector, a trace data packaging module, a trace data compression module, a signaling packaging module and a message transceiving module. The trace data packaging module is used for packaging the acquired trace data; the trace data compression module is used for compressing the packaged data; the signaling packaging module is used for filling the compressed trace data into the signaling messages; the message transceiving module is used for sending the trace data and control commands. The system and the method for user data transmission of the satellite mobile communication system have the advantages that occupancy of traffic channels is avoided, adoption of a charge system of a network operator is avoided as well, and a remote tracking function is realized.
Owner:CHENGDUSCEON TECH
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