485 results about "Superposition method" patented technology

The invention provides a personalized film recommendation system and method based on attribute description, comprising a candidate film data base, a viewing record data base, a user interest preference model calculation module and a film recommendation model. The personalized film recommendation system uses the attribute description to represent the film feature and is hierarchized according to the types and analyses the user interest hot spot of concentration ratios of different hierarchy and tracks the user interest change using the time forget factor and film model linear superposition method, responds the feedback of the user on the film at real time, adjusts the user interest preference model and increases the accuracy and adaptability of recommended film.

Geophysical exploration for oil wells, the source from the vertical seismic profile aspect wave data stack depth domain Corridor profile approach is the use of in situ collection of well spacing VSP data, which will all receive points drilling depth of information and hierarchical data with the depth of information, the use of direct wave VSP data travel through and optimization algorithms are highly accurate anti-layer velocity model, the direct wave to the beginning of the reflected wave in the vicinity of the depth and precision homing imaging, further in-depth domain Corridor section and with the superposition of alternative conventional method leveled in the time domain, with corridors and the superposition method, the results can be superimposed for direct comparison with the drilling and seismic data stratified layer identification. More intuitive, but also made full use of VSP data in the depth of information, make geological formation of the earthquake response and drilling, logging data in depth domain direct contrast, a more intuitive geological layer and the relationship between seismic horizon, thereby enabling layer of identification and calibration more reliable.

The invention relates to a rapid bridge detection method, which belongs to the technical field of civil engineering application. Firstly, a loading test vehicle with known axle load and wheelbase is adopted for loading to measure response of a test point; then, a method of adopting a specific function (piecewise polynomial and sine wave stacking) to fit the dynamic response of the test point is adopted to extract influence line information of the bridge; a tire-pavement stress distribution emprical formula is introduced to build a tire-pavement contact force trapezoid distribution model; in combination of the actual influence line information and the vehicle tire-pavement contact force distribution model, a linear superposition method is adopted to reconstruct bridge test point response information under different vehicle load combination effects, and thus, rapid bridge detection based on the influence lines is realized. Based on few driving tests on a single vehicle, the actual influence line information can be acquired rapidly and accurately, the bridge response information under different static load combination working conditions is reconstructed, rapid bridge detection is achieved, and the defects that the existing bridge detection method is long in consumed time, high in economic cost and long in traffic block time can be solved.

The invention discloses a method for analyzing the fatigue life of a steering knuckle, comprising the following steps: 1) obtaining the fatigue load of the steering knuckle; 2) carrying out uniaxial tensile material test on the use material; 3) if the fatigue load is under the static load condition, the elastic-plastic finite element analysis method is adopted to solve the problem; or, if it is the actual pavement load spectrum, the elastic-plastic finite element analysis is carried out on the points exceeding the yield strength by elastic finite element method and linear superposition method,and the modified stress-strain results are obtained. 4) analyzing the biaxiality of the obtained stress response in time domain to determine the load state of the steering knuckle; 5) calculating thedamage accumulation and life of steering knuckle. The present invention solves the problem of time-consuming finite element solution under the input of actual pavement load spectrum, at the same time, the stress and strain of the material entering the plastic phase are considered, so that the result is more accurate, and fatigue analysis is carried out by combining the static load condition or the single channel static load condition, and more references are provided in the design phase.

The invention compensates for any interference from a mobile communication unit to a positioning receiver unit in a multiple standard communication device with mobile communication and localization functionality. A first sub-unit receives input signals at a predetermined input level. A second sub-unit transmits output signals at an output level that is large compared to the input level of the first sub-unit. A branch-off unit branches off a part of the output signal before the antenna of the second sub-unit. An interference suppression unit receives the branch-off part of the output signal and derives an interference compensation signal therefrom through attenuation and subsequent phase shifting. The interference compensation signal is supplied to a superposition unit that also receives the input signal of the first sub-unit.

The invention provides a superposition method and an auxiliary information superposition device for auxiliary information of video signals. The method comprises the following steps of: acquiring an audio signal of a first meeting place and at least one video signal of the first meeting place, wherein the at least one video signal comprises a plurality of video objects of the first meeting place; acquiring indication information, wherein the indication information is used for indicating a video area where a video object is positioned corresponding to the acquired audio signal in the plurality of video objects of the at least one video signal; and performing superposition processing on text information corresponding to the audio signal of the first meeting place and the video signal according to the indication information so as to display the text information in the video area indicated by the indication information. The method guarantees that the audio signal can be displayed in a corresponding display screen where the video signal is positioned in a caption form under the video conference application scene with multiple images, so the consistency of display directions of the images and the captions is guaranteed.

The invention provides a superposition method and a superposition system of video structured information, and a user terminal. The method comprises the following steps: the user terminal receives at least one video frame, wherein the video frame is synchronously sent by a video source server to the user terminal and an algorithm server; meanwhile, the user terminal further receives structured information sent by the algorithm server, wherein the structured information is generated by the algorithm server by identification of a monitoring target in the video frame and in accordance with the monitoring target; and finally, the user terminal superposes custom information in the video frame according to a timestamp of the video frame, a video timestamp in the structured information and a position coordinate of the custom information. In the superposition method provided by the embodiment of the invention, the algorithm server is only used for generating the structured information without superposing the structured information, the superposition process of the structured information is executed by the user terminal, so that the superposition speed of the structured information is accelerated, thereby both guaranteeing the display instantaneity of video stream and reducing the requirements of the superposition system for the software and hardware configuration.

The invention discloses a computer aided detection method for microcalcification in mammograms, which comprises the following steps of: performing grayscale correction and transformation on a mammogram image to obtain an image after grayscale correction; acquiring microcalcification enhanced mammogram image by adopting dual-structure element-based background superposition method, and simultaneously acquiring another background suppressed mammogram image by adopting a Top-hat transformation method in morphology; segmenting the two images by adopting double thresholds to acquire a preliminary microcalcification image, and performing postprocessing to form a coarse microcalcification detection image; and extracting characteristics from coarsely detected microcalcification destination area, classifying by using a support vector machine, removing false microcalcification destination areas, marking the rest microcalcification into the mammogram image for the reading of doctors. The method can free the doctors from trivial mammogram reading and classifying work, and assists the doctors in better understanding and judging the images so as to reduce error diagnosis and missed diagnosis and fulfill the aim of improving diagnostic accuracy.

A shore bridge structure wind vibration fatigue life forecasting method based on accumulated damage of probability includes the following steps: step 1 adopting a harmonic superposition method to simulate time domain waveform of wind load borne by a shore bridge structure and according with davenport power spectrum characteristics; step 2 enabling the wind load to be acted on a finite element model of the shore bridge structure, and calculating a stress response time interval of fatigue calculation points of the shore bridge structure; step 3 adopting a rain flow counting process to deal with the stress response time interval so as to obtain fatigue statistical characteristics of amplitude stress spectrum; and step 4 adopting a probability accumulated damage model and a method of a probability theory to forecast wind vibration fatigue life of the shore bridge structure at a certain degree of reliability. The shore bridge structure wind vibration fatigue life forecasting method has the advantages of applying to a complex shore bridge structure, and being wide in scope of application, high in calculating accuracy and capable of calculating reliability fatigue life of a wind resisting structure under the action of any random wind load.

The invention relates to a modal synthesis dynamic modeling and analysis method for an automobile driving axle system. The method is characterized by comprising the steps that 1, a finite element model of all components of a driving axle is established, boundary nodes are defined according to the connecting relation between the components, a modal synthesis model of all the components is established, and a modal synthesis rigidity matrix and a mass matrix of all the components are obtained; 2, a connecting relation model of all the components is established; 3, the modal synthesis rigidity matrix and the mass matrix of all the components are assembled according to the connecting relation, a complete modal synthesis dynamic model of the driving axle system is established, and a rigidity matrix and a mass matrix of the driving axle system are obtained; 4, natural vibration frequency and a regular vibration mode of the dynamic model of the driving axle system are calculated, and a mode superposition method is adopted to calculate the dynamic response of the driving axle system under excitation of dynamic engaging force of gears of a main reducing gear. In the whole modeling process, high universality and calculating efficiency are achieved, and the method can be widely applied to dynamic analysis of a gear transmission system.

The invention relates to an ion mobility spectrometer and method for controlling an ion gate by using an alternating current superposition method. The alternating current superposition method is adopted, and a set of series resistance circuit is added and is connected to one end of the ion gate. When no pulse signal is input, the size of resistance value of a potentiometer in the series resistance circuit is adjusted, and the potential difference between two sets of metal wires of the ion gate is changed, so that the potential difference between the metal wires is large enough, the ion gate is completely closed to prevent ions from entering a migration zone from a reaction zone; when a pulse signal is input, the potential and polarity of the pulse signal enable the voltage between the two sets of metal wires of the ion gate to be equal, the ion gate is opened, the ions can penetrate through the ion gate to reach the migration zone to be detected by an ion signal detector. The control way can effectively achieve the function of the ion mobility spectrometer. The device cost of the ion mobility spectrometer is reduced, the resolution ratio or the signal to noise ratio of the ion mobility spectrometer can be increased, and the functions of the ion mobility spectrometer are enriched.

The invention discloses a computer simulation method of human-computer engineering design of a vehicle cab, comprising the following steps of: firstly, establishing a human parameter database; subsequently carrying out three-dimensional operation domain analysis: inputting or calling existing human dimensions and setting the position of a manipulator to work out the sphere of activity of a human body in each plane; determining the three-dimensional operation domain of the human body by a multi-plane superposition method and judging whether the position of the manipulator is reasonable or not; if reasonable, ending the analysis; otherwise, redesigning the manipulator and carrying out the analysis again; then carrying out visual field analysis: inputting or calling existing eyellipse parameters and setting the position of an indicating instrument to work out the projected outline of the eyellipse and the projective point of the judgment point of the indicating instrument; analyzing the range of the visual field in which the judgment point of the indicating instrument is located; judging whether the position of the indicating instrument is reasonable or not; if reasonable, ending the analysis; otherwise, redetermining the position of the indicating instrument and analyzing again; and finally ending the whole design process. The invention has wide sphere of application and can improve the design efficiency.

The invention discloses a method for preparing a tissue-engineered bone/cartilage integrated scaffold. An integrated scaffold structure of which internal pores are aligned and pore diameters are changed in a gradient way along a thickness direction and which has good mechanical properties is obtained by simulating the composition and spatial structure characteristics of natural articular cartilage and using extracellular matrixes and bone matrix gelatin of the cartilage as main raw materials by methods such as a different concentration superposition method, a directional crystallization method, a freeze-drying method, a cross-linking reaction method and the like. The high biocompatibility of the scaffold is favorable for the adhesion and proliferation of cells; a special pore structure of the scaffold ensures that the content of matrixes secreted by the cells is also changed in a gradient way; and meanwhile, a bone matrix gelatin substrate provides good mechanical support for the instant fixation of the scaffold and an injured part.

The invention aims at providing pipe excitation source identification and a prediction method of vibration response to a pipe excitation source. The steps are collecting a pipe wall acceleration signal and transforming the collected time domain signal into a frequency domain signal through Fourier transform, performing excitation source identification and equivalence and using a linear system superposition method to determine the size of the pipe system equivalent excitation source through comparing the experimental data with the pipe system dynamics calculation result, and using a transfer matrix method for predicting the dynamic response to the vibration of any optional position of the pipe according to the equivalent excitation. According to the pipe excitation source identification and the prediction method of vibration response to a pipe excitation source, an appropriate measuring point easy to measure is chosen according to the specific arrangement of the pipe for the excitation source size identification and the pipe vibration prediction, so that problem of the pipe system excitation source characteristics and the difficult vibration measurement of some portions of the pipe and others can be solved, the experimental measurement points arrangement can be reduced and the flexibility of the pipe vibration measurement can be increased.

The invention provides a GIS technology-based method for comprehensively evaluating regional ecological sensitivity aiming at the problem that more sensitive factors and spatial analysis are related existing in the conventional methods for evaluating the regional ecological sensitivity. The method comprises the three steps of: firstly, determining the type of possible ecological environment problems in the research region, and determining an ecological sensitive point; secondly, establishing an ecological sensitivity evaluation index system; and finally, after the ecological sensitivity evaluation standard is determined and the ecological sensitivity is graded, performing spatial summation of a environmental impact factor graph by a direct superposition method or weighted superposition method and the like based on the GIS technology so as to obtain a graded graph of the ecological environment sensitivity in the research region. The evaluation method is widely applied in various plans of ecological cities, such as a green land system, a landscape pattern, a natural ecological system, protection of biodiversity and an ecological preservation area. The method has the advantages of high efficiency, low cost, high precision and wide application range.

The invention discloses a layer superposition method and a mobile terminal employing the layer superposition method. The method comprises the following steps: obtaining pixel data of a current layer and pixel data of a superposed layer; carrying out transparent and/or semitransparent processing on the obtained pixel data of the superposed layer as required; superposing the superposition layer that has been processed by the transparent and/or semitransparent processing on the current layer to obtain a superposed image. According to the invention, a simple layer superposition method is used to realize a semitransparent viewing frame, thereby substantially saving hardware cost, providing convenience for users; besides, a new function is added to the mobile terminal; that is, a transparent and/or semitransparent viewing frame can be realized. It is convenient for a user to realize grasping on the whole during the view finding process, thereby effectively improving a shooting effect. Moreover, the structure of the mobile terminal is simple and realization cost is low.

The invention provides an on-board figure and image virtual-real superposition method. The on-board figure and image virtual-real superposition method is efficient and high in precision. On the basis that data texture information is fully considered, natural fusion of two kinds of data including a virtual figure and a real image is achieved. The on-board figure and image virtual-real superposition method comprises the steps of conducting coarse-granularity processing, wherein relevant information of a real-time state is collected, a shooting area of a video image is rapidly positioned, altitude data and landform data at the same position within an adaptive area range in a on-board database are read, a corresponding figure is drawn through a computer, and an observation angle of view and a camera shooting angle of view are adjusted to be identical; conducting fine-granularity processing, wherein firstly, a feature detection algorithm is utilized, homonymy point feature information of the figure and the image is extracted, high-precision registration of the figure and the image is achieved, by means of an optimized interpolation algorithm, the figure data and the image data are fused, and then a result of figure and image virtual-real superposition is displayed.

The invention provides a simulation method for an elastic waverider hypersonic flight vehicle. The method includes the following steps that considering influences of aerodynamic heating and variable section inertia moment, an elastic model of a hypersonic flight vehicle free beam structure is established; a model superposition method is used for solving an elastic vibration equation, the intrinsic frequency, damping ratio and intrinsic vibration mode of each mode are solved, and on this basis, an elastic vibration generalized coordinate equation of the waverider flight vehicle is obtained; a computational fluid dynamics method is used for obtaining aerodynamic force and engine propulsion of the flight vehicle; on the basis of analyzing thrust, aerodynamic force and aeroelasticity, a rigid body-elastic coupling model of the hypersonic flight vehicle is established. The simulation method is suitable for performing modeling and simulation on the waverider flight vehicle. On this basis, the established model of the waverider hypersonic flight vehicle is more accurate, and the aerodynamic/propelling/elastic coupling characteristics of the flight vehicle can be reflected better in the process of model simulation.

The invention discloses an oil shale earthquake identification and evaluation method, which comprises the steps: a) calculating shale gas organic carbon content TOC through a wave impedance delta logR superposition method; b) the TOC value calculated in the step a) being same with the actually-measured TOC value of samples; c) establishing a rock physical model of an oil shale; and d) establishing a logging curve of logging information and seismic attribute longitudinal wave velocity by utilizing seismic channels beside a shale gas well. The rock physical model is established, and organic content of the oil shale is obtained through velocity inversion; and through the earthquake multi-attribute prediction technique, oil content information is inverted and extrapolated to seismic data, so that earthquake oil content inversion data volume of a work area is obtained, and a foundation is laid for identification and evaluation of the oil shale.

The invention discloses a marine target and electronic chart superposition method and a marine target and electronic chart superposition system in an on-board infrared video image. The method comprises the following steps: 1, acquiring and reading the on-board infrared video image; 2, segmenting a marine target in the on-board infrared video image, and positioning the marine target to acquire the position of the marine target relative to the ship; 3, calculating the corresponding geographical coordinates of the marine target according to the ship position of the ship, the real-time course of the ship, the orientation of an infrared thermal imager and the result of the step 2; 4, correcting the target position which corresponds to the marine target by utilizing corresponding AIS data; and 5, superposing the corrected marine target into an electronic chart so as to be displayed in a transparent mode. According to the method and system disclosed by the invention, the marine target and electronic chart in the on-board movable infrared video image are superposed and displayed by utilizing the infrared thermal imager, the detection and behavior identification capacities of seafaring personnel on the target in the seafaring sea area are enhanced, and the ship navigation safety is effectively improved.