Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

2517 results about "Distribution characteristic" patented technology

Three characteristics of distributions. There are 3 characteristics used that completely describe a distribution: shape, central tendency, and variability. We'll be talking about central tendency (roughly, the center of the distribution) and variability (how broad is the distribution) in future chapters.

Geographic and geomorphic characteristic construction method based on laser radar and image data fusion

The invention discloses a geographic and geomorphic characteristic construction method based on laser radar and image data fusion and belongs to the automatic control field. The method specifically comprises 1) obtaining 3D laser point clouds and panoramic pictures of the surrounding environment of a ground unmanned mobile platform at present; 2) matching the 3D laser point clouds and the panoramic pictures and obtaining matched images; 3) dividing the 3D laser point clouds based on different distribution characteristics corresponding to each laser point and carrying out clustering based on a dynamic clustering algorithm of each distribution characteristic to obtain a plurality of region classes; 4) finding passable region classes in the plurality of region classes based on travel ability of the ground unmanned mobile platform; 5)obtaining landform identification vectors of the passable region classes by utilizing a denseness SIFT algorithm; and 6) carrying out landform classification on the passable region classes based on the landform identification vectors and by utilizing a classifier. The method is suitable for passable geographic and geomorphic characteristic construction of the ground unmanned mobile platform.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir

The invention discloses a method for enhancing recovery ratio through three-dimensional streamline regulation of a water drive reservoir. The method is characterized by comprising the following steps: identifying the planer development segment and vertical development segment of a preferential seepage channel to quantificationally calculate sampling parameters; establishing a three-dimensional geologic model comprising the characteristics of the preferential seepage channel, establishing a reservoir numerical simulation model, and finely determining a residual oil distribution characteristic under current heterogenous condition through reservoir numerical simulation; carrying out pattern modification and optimized water shutoff and profile control design; and determining whether layered injection and recovery is required according to water adsorption characteristics of a vertical water well and liquid generation characteristics of an oil well by utilizing the reservoir numerical simulation result. In the invention, on the basis that the preferential seepage channel is blocked through deep profile control and water shutoff, the planer flow line direction is changed through the combination water shutoff and profile control with pattern modification optimization, water shutoff and profile control are optimally combined with subdivided development layers and layered injection and recovery optimization to control and regulate the density of vertical flow lines, and the purpose of maximally control underground flow lines is achieved through the synergistic effect of different means.
Owner:CHINA PETROLEUM & CHEM CORP +1

Spatial circular geometric parameter binocular stereo vision measurement method

The invention discloses a spatial circle geometrical parameter dual-eye solid visual measurement method suitable for non-contact type online measurement of the spatial circle geometrical parameter of an industrial product, aiming at overcoming the existing problems of low measurement precision, slow measurement speed and low automation degree. The method is divided into a calibrating stage, an image processing stage and a spatial circle fitting stage. A neural network technique is firstly adopted to carry out the calibration of a camera; a dual-camera is utilized to carry out the extraction of sub-pixel image edges of the spatial circle, a simple algorithm is developed based on the image gray gradient distribution characteristic so as to realize the match of edge points, the practical 3D spatial coordinates of the circle edges are then obtained, and the geometrical parameters of the spatial circle comprise radius, position of center of circle and orientation of the plane where the spatial circle is arranged are gained by the fitting of the spatial circle with corresponding mathematical geometrical knowledge. The spatial circle geometrical parameter dual-eye solid visual measurement method has fast image processing speed and high automation degree, and has relative measurement error of the spatial circle of superior to plus or minus 0.6% when the plane where the spatial circle is arranged has an angle of about 50 DEG with the image plane.
Owner:JILIN UNIV

Polymer lithium ion battery and diaphragm thereof

The invention belongs to the technical field of polymer lithium ion batteries, in particular to a diaphragm for the polymer lithium ion battery. The diaphragm comprises a multihole base material, wherein an inorganic substance coating layer and an organic substance coating layer are coated on at least one surface of the multihole base material; and the organic substance coating layer is in island-type and / or linear distribution and coated on the surface of the multihole base material and / or the inorganic substance coating layer. Compared with the prior art, due to the inorganic substance coating layer, the diaphragm can keep relatively high heat stability and mechanical performance, so that the lithium ion battery has high safety performance; the organic substance coating layer has high imbibition swelling capacity, and an interface has high stability, so that the manufactured lithium ion battery has perfect mechanical performance; due to the distribution characteristic of the organic substance coating layer, spaces are provided for charging and discharging processes of a pole piece and a circulation process; and the problem of deformation of the polymer lithium ion battery is well solved. Furthermore, the invention also discloses a polymer lithium ion batter with the diaphragm.
Owner:NINGDE AMPEREX TECH +1

LED device and manufacturing method thereof

In an LED device, an opening portion of a package in which a plurality of five light-emitting elements are mounted is filled with a transparent epoxy resin and sealed with the resin. The transparent epoxy resin is shrunk when cured. Hence, the surface of the transparent epoxy resin is dented in the center portion so that the outer edge portion becomes higher than the center portion. The light-emitting elements located at opposite ends are the highest in element height among the five light-emitting elements. Hence, when the light-emitting elements are mounted at opposite ends of a single row, distances from light-emitting surfaces of the five light-emitting elements to the surface of the transparent epoxy resin are made uniform and luminous intensity distribution characteristics thereof are made uniform. Tips of leads are further bent up along side surfaces of the package. Hence, when the LED device is soldered onto a mount board, solder is deposited even on the up-bent tips of the leads, so that surface tension of solder is balanced on the front and rear of the package. As a result, the LED device can be mounted in a predetermined position while prevented from sliding. In an LED lead frame, hanger leads are provided so as to be extended in three directions of a package. Hence, the electrically conductive leads can be bent stably and accurately without tottering of the package in the process of bending the electrically conductive leads.
Owner:TOYODA GOSEI CO LTD +1

Road zebra crossing automatic extraction method based on vehicle-mounted laser scanning point cloud

The invention provides a road zebra crossing automatic extraction method based on vehicle-mounted laser scanning point cloud, and relates to public traffic road zebra crossings. According to the method, global positioning system data for recording vehicle positions and tracks in real time is used for extracting a plurality of cross sections from the vehicle-mounted laser scanning point cloud data, and the road and non-road classification is realized through detecting the elevation mutation of road shoulders of the roads in the scanning line data; then, the three-dimension road data is converted into an intensity characteristic image with space distribution characteristics, the laser scanning point normal distribution characteristics are utilized for dynamically cutting the road zebra crossings, the GPS (global positioning system) track data is used again for calculating the linear morphology closed operation direction and size, and the extraction of the road zebra crossings is realized. Through the cross section subdivision on the vehicle-mounted moving scanning data, and the three-dimension road surface data detection is converted into the detection of the elevation mutation of the road shoulders of the roads in the two-dimension profile for realizing the road and non-road classification. Compared with a method of directly processing mass three-dimension data, the method has the advantages that the calculation quantity is small, and the efficiency is high.
Owner:XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products