30results about How to "Simplify calculation" patented technology

The present invention relates to an object-based 3-dimensional stereo information generation apparatus and method, and an interactive system using the same. The method comprises: obtaining at least two 2-dimensional images with respect to the same space at a first time point; extracting objects from the at least two 2-dimensional images, respectively; establishing correspondences between objects; and generating 3-dimensional stereo information according to corresponding objects. The apparatus and interactive system comprises: at least two image capturing units for respectively capturing 2-dimensional images; and processing means for generating 3-dimensional stereo information according to the captured 2-dimensional images.

The mode of execution of the invention provides a method and device for pushing music for a user. The method comprises the following steps: acquiring a feature parameter of the current environment of the user and a movement speed parameter of the user; acquiring the music feature parameter according to the feature parameter of the current environment and the movement speed parameter of the user; and pushing the music for the user according to the acquired music feature parameter. Through the adoption of the mode provided by the invention, the playing and pushing of the music are more flexible and accurate, the manual regulation and selection of a rider are avoided, the riding security is enhanced, the operation time is saved, and the operation efficiency is improved.

The invention discloses a modulation mode identification method based on an all-digital receiver. The method comprises the following steps: 1, carrying out FFT (Fast Fourier Transform) on a measurement and control signal received by receiving equipment, and estimating a carrier frequency and a 3dB bandwidth; 2, completing down-conversion, filtering and resampling by using the estimated carrier frequency; 3, tracking the frequency offset of the orthogonally decomposed low-frequency signal through a phase-locked loop, and distinguishing an FSK signal and AM _ FM and MTONE _ FM signals by using afrequency tracking curve; and 4, carrying out FFT conversion on the frequency tracking curve containing the modulation information to identify AM _ FM and MTONE _ FM signals. The method has the advantages of being simple in calculation amount and easy to achieve in hardware. According to the method, the FSK signal and the composite modulated narrow-band FM signal can be accurately judged in the full-digital receiver, and the recognition accuracy is better than that of a traditional signal instantaneous spectrum recognition method.

The invention provides a tracking-maintaining and orbit transfer method of an on-satellite autonomous non-cooperative maneuvering target. A typical C-W equation serves as a relative motion model, a relative motion relation between a tracking spacecraft and the spatial non-cooperative maneuvering target is linearized, the computational complexity is reduced, and on-satellite autonomous computing isrealized on the premise that capability of on-satellite hardware equipment is limited. Capability constraint of the tracking spacecraft is taken into full consideration during design of tracking-maintaining and orbit transfer strategies, the maximal ignition time constraint and shortest time interval constraint between twice ignition of a thrust of the tracking spacecraft are introduced, so thatthe design method of the tracking-maintaining and orbit transfer strategies of the spatial non-cooperative maneuvering target is realized under engineering constraints fo the tracking spacecraft.

A user selection method and apparatus for multiuser multiple-input multiple-output (MIMO) are disclosed. The method includes: selecting two user-beam pairing modes, and obtaining target functions corresponding to the two user-beam pairing modes; comparing the target functions corresponding to the two user-beam pairing modes; and selecting a user-beam pairing mode with a larger target function. With the present invention, the optimal user-beam pairing mode can be quickly obtained when the channel information is inaccurate; and the calculation is simplified.

The present invention discloses a vision-based aircraft landing aid. During landing, it acquires a sequence of raw runway images. The raw runway image is first corrected for the roll angle (γ). The altitude (A) can be calculated based on the runway width (W) and the properties related to both extended runway edges on the rotated (γ-rotated) runway images. Smart-phone is most suitable for vision-based landing aid.

The invention discloses a method and device for detecting a physical property of an object. The method comprises the following steps: transmitting fixed frequency, ultrasonic waves with fixed amplitude and composite sound waves of low-frequency sound waves to a target object; receiving reflected waves of the ultrasonic waves; contrasting the phase change and amplitude change of the transmitting waves and reflected waves of the ultrasonic waves, so as to analyze the physical property of the object. The device comprises a controller, an analyzer, an ultrasonic receiver, a low-frequency sound wave generator and an ultrasonic generator, wherein the controller is connected with the ultrasonic generator and the low-frequency sound wave generator, and controls the transmitting of the ultrasonic generator and the low-frequency sound wave generator; the ultrasonic receiver is connected with the analyzer and further receives reflected waves of the ultrasonic waves, converts the reflected waves to an electrical signal and sends the electrical signal to the analyzer; the analyzer contrasts the phase change and amplitude change of transmitting waves and reflected waves of the ultrasonic waves and analyzes the physical property of the object. The method is simple, small in calculated amount and accurate in result, and the device is simple in structure and low in price.

The invention provides a method for determining influences of distributions of fractures and karst caves on carbonate reservoir permeability and relates to the technology of exploration and development of oil and gas fields. The method has the advantages that flowing simulation is carried out without simplifying the fractures and the karst caves according to real distribution parameters of the fractures and the karst caves of a carbonate reservoir stratum, and a unified model of a lattice Boltzmann method is adopted without considering boundary problems between matrixes and the fractures as well as the karst caves to enable all lattices to be processed in a unified manner, so that the calculated amount is greatly simplified and accurate results can be obtained; improved matrix permeability of the whole carbonate stratum with the fractures and the karst caves reckoned in through simulation according to different distributions of the fractures and the karst caves is obtained, and a specific value of the improved matrix permeability and intrinsic permeability is used for representing different distributions of the fractures and the karst caves on the improvement degree of the permeability of the carbonate reservoir stratum, so that quantitative calculation of the influences of the distributions of the fractures and the karst caves on the carbonate reservoir stratum is achieved.

The invention provides a behavior data processing method and device, an apparatus and a readable storage medium. The method comprises the steps of obtaining the current behavior data of a user; extracting the first behavior features of the current behavior data from the current behavior data; obtaining the second behavior features of the current behavior data according to the first behavior features of the current behavior data; obtaining a behavior vector of the current behavior data according to the first behavior features of the current behavior data and the second behavior features of thecurrent behavior data; and comparing the behavior vector of the current behavior data with a standard behavior vector to verify the user. According to the method, by extracting the features of the behavior data, the behavior data can be efficiently utilized for identity recognition.

A recognition method for banknote zebra crossing black and white blocks includes the following steps: obtaining a banknote image; obtaining to-be-detected images corresponding to a banknote zebra crossing area in the banknote image; horizontally dividing the to-be-detected images into a plurality of rows; separately detecting a row gray value of each of the plurality of rows; calculating a noise reduction gray value of each of the rows; calculating an average gray value of each of the rows according to the noise reduction gray value; determining a middle row of the white blocks of behavior zebra crossing of the row having the gray average value greater than the gray average value of all the adjacent rows; and determining the row having the gray average value less than the gray average value of all the adjacent rows as the middle row of the black blocks of the zebra crossing. By calculating the noise reduction gray value of each of the rows, the influence of uneven brightness on the black and white block detection of the zebra crossing is effectively eliminated; the middle rows of the black blocks and the white blocks can be effectively extracted by calculating the average gray value of each of the rows, and furthermore, distribution of the zebra crossing is determined, the calculation amount is simplified, and the recognition accuracy of the black and white blocks is high.

A power control apparatus includes: a first obtainment unit which obtains a power flow value at a power flow measuring point and a voltage value at a voltage measuring point provided; a power flow control unit which calculates a first power change value, to cause the power flow value to approach a predetermined target value; a voltage control unit calculates a voltage value at the voltage measuring point when the first power has been changed by the first power change value, and sets a second power change value, based on whether or not the voltage value falls within a predetermined voltage range; and a notification unit which notifies the power adjustment apparatus of a command value for causing the power adjustment apparatus to input or output the first power changed by the first power change value and the second power changed by the second power change value.

The invention discloses an IDFT-based software phase-locked loop method and device. Voltage signals of a non-ideal three-phase system are sampled to transform a three-phase network voltage from an abcstationary coordinate system to a [alpha][beta] stationary coordinate system through clarke transform, voltage fundamental positive sequence signals are extracted through the IDFT, and the voltage signals in the [alpha][beta] stationary coordinate system are transformed to a dq synchronous rotating coordinate system through park transform. The angular frequency of voltage fundamental wave positive sequence signals is obtained by a PI controller. The device comprises a sampling unit, a phase locking ring unit, a closed loop control unit, a sinusoidal pulse width modulation unit, a drive unit and an NPC three-level inverter. The method can filter the harmonic component, the negative sequence component and the direct current component of the non-ideal network voltage signal in the two-phasestationary coordinate system, and is simple in design of the phase-locked loop parameters and high in phase-locking precision.

The invention discloses a rice field weed identification method based on GA-ANN feature dimension reduction and SOM feature optimization. The method comprises the following steps: step 1, image acquisition; Collecting images of rice field weeds as samples under different natural conditions; Step 2, image preprocessing; In order to solve the problem that the weed identification precision is influenced by paddy field illumination intensity change and water surface reflection, on the basis of an RGB color feature segmentation algorithm, introducing an RGB linear weighting coefficient to segment an image to obtain a binary image, and then using a morphological operator for post-processing to separate out a weed binary image; According to the method, data redundancy can be reduced, the calculation amount is simplified, the screened main characteristics have the characteristics of independence, distinguishability and small number, the method can be effectively applied to weed classificationand recognition, and the classification precision is improved.

A method and system for adjusting selected colors of an image is presented. A chrominance adjustment system in accordance with one embodiment of the present invention, determines whether the color of the current pixel is near a selected color. When the color of the current pixel is near the selected color the chrominance adjustment system calculates a color specific chrominance adjustment factor based on the current color and the selected color and adjusts the color of the current pixel using the color specific chrominance adjustment factor.

A reciprocating body 12 is reciprocably housed in a cylinder body 6, and a pressure rod 20 is reciprocably attached to this reciprocating body 12. A pressure end 20a of the pressure rod 20 protrudes from the cylinder body 12 toward the outside. By the reciprocating body 12 and diaphragms 17 to 19, an advance pressure chamber 27 and a weight offset pressure chamber 29 are partitioned and formed in the cylinder body 6. After the pressure end 20a is disposed vertically downwardly, the weight offset pressure chamber 29 is filled with compressed fluid, whereby self weight of the reciprocating body 12 and the pressure rod 20 is offset. Then, the compressed fluid is supplied to the advance pressure chamber 27, and an object to be pressurized W is pressurized through the pressure rod 20.

The invention relates to an MIMO antenna selection and data transmission method and evaluation method under non-perfect channel information. Selection and transmission processes comprise steps that S1: M sending antennas are arranged on a sending end and N receiving antennas are arranged on a receiving end; S2: the receiving end generates an estimation value of a channel matrix according to orthogonal pilot quantity, emission power and antenna quantity; S3: the receiving end selects an antenna with the biggest gain to receive signals and generates a channel estimation vector of the antenna according to the estimation value of the channel matrix; and S4: the receiving end carries out quantification on a unit vector of channel estimation vectors by use of random vector quantification mode, and corrects received sending signals to obtain receiving signals according to quantification results and the channel estimation vectors. Compared with the prior art, information of the orthogonal pilot quantity, the emission power and the antenna quantity is estimated according to channels, and the antenna with the biggest gain is selected to receive signals, so it is well achieved that complexity and resource consumption are reduced.

The invention discloses a road name display method, and an apparatus, a server and a system thereof, and relates to the electronic map field to solve a technical problem that the calculation quantity for displaying road names in the prior art is large. The method comprises the following steps: acquiring roads to be displayed in an area to be displayed of an electronic map; searching the road names corresponded by the roads; searching the display auxiliary lines corresponded by the roads, wherein the display auxiliary lines are lines generated through the smooth processing of loci of the roads in advance; and displaying the road names along the display auxiliary lines. The road name display speed is accelerated in the invention.

The invention discloses a YUV-HSV color space transformation method and system, relating to the image processing field. The method comprises the steps of: through checking a precomputed YUV-RGB corresponding relation table, converting each pixel point of an image in a YUV format into a corresponding value R'G'B' of an RGB format with Y component being removed; and converting the corresponding value R'G'B' of each pixel in an RGB format into a corresponding value in an HSV format. The algorithm increases an algorithmic speed under the condition of guaranteeing precision, allows a computer to rapidly perform positioning in the table, and converts a YUV channel to an HSV channel fast.

The invention discloses a small deviation rapid correction method for the carrying capacity of a solid binding carrier rocket, and the method comprises the following steps: giving the mass, thrust, specific impulse and working time of each module of a reference scheme of the solid binding carrier rocket, and calculating the carrying capacity of the solid binding carrier rocket in a designated target orbit; calculating the change rate of the carrying capacity relative to the mass of each module; and correcting the carrying capacity by using the mass change of each module and the change rate of the carrying capacity relative to the mass of the module. According to the small deviation rapid correction method, the rocket carrying capacity deviation can be rapidly corrected under the condition that the mass deviation is given, and the method has the advantages that the carrying capacity calculation complexity is simplified, the calculation amount is reduced, and the rocket design efficiency is improved.

The invention provides a multi-scene flood inundation analysis method and device based on a GIS (Geographic Information System). The method comprises the steps that map data of a flood analysis area is loaded, user selection operation is received, and preset submerging analysis methods are selected, and the preset submerging analysis methods comprise a passive submerging analysis method, an active submerging analysis method and a dam break submerging analysis method. Analyzing parameters, input by a user through the target interface, of the flood area are obtained, the analyzing parameters are processed through the selected target analyzing method, a submerging result is obtained, and the submerging result comprises the submerging water depth, the submerging area and the submerging volume; and loading the flooding result on a map of the flood analysis area in an image form for display. According to the method, the requirement for data in flood inundation analysis can be lowered, the calculation time is shortened, and the flood inundation analysis range is widened.

The invention discloses a signal combination method and system. The method comprises the steps of establishing an objective function related to a combined signal, and determining a to-be-solved characteristic matrix corresponding to a combination weight vector according to the objective function; computing the to-be-solved characteristic matrix through adoption of a matrix blocking recursive algorithm and obtaining a solved characteristic matrix; computing the optimum combination weight vector corresponding to the solved characteristic matrix; and carrying out weighted coherent addition operation on multiway signals according to the optimum combination weight vector, thereby determining the combined signal. The method and the system provided by the invention can be utilized under the condition that noise variances of the multiway signals are equal or unequal, the computing quantity is greatly simplified, and the performance of the combined signal is kept.

The invention discloses a model reference adaptive flux linkage identification parameter setting method, and belongs to the field of permanent magnet synchronous motor parameter identification. According to the method, a model reference adaptive flux linkage identification model is linearized to obtain an open-loop transfer function of the model, when a rotor flux linkage changes with time, a fluxlinkage steady-state error expression can be obtained, and setting of adaptive rate parameters is carried out accordingly.

The invention belongs to the technical field related to multi-scale topological optimization, and discloses a multi-scale topological optimization design method based on Mobile-U-Net. The method comprises the following steps: S1, gridding a multi-scale topological structure to obtain a plurality of grids and the stress state of each grid, and calculating the corresponding initial displacement by using the stress state of each grid; S2, constructing a parallel Mobile-U-Net convolutional neural network prediction model, constructing a plurality of information input channels, and taking the optimized configuration as output; and S3, obtaining a macroscopic data sample set and a microscopic data sample set, training to obtain a macroscopic prediction model and a microscopic prediction model, and respectively predicting the configuration of the to-be-optimized multi-scale topological structure by using the macroscopic prediction model and the microscopic prediction model so as to obtain an optimized macroscopic configuration and an optimized microscopic configuration. The macro-micro topological configuration corresponding to the initial structure setting information can be output in real time without any finite element iteration step.

The invention discloses a friction generator output electric energy calculation method, device and system. The method includes the following steps that: the parameters of a friction generator are obtained, a distance x(0) between a first friction component and a second friction component at an initial time point is obtained, the amount Q0 of charges induced on the friction generator at the initialtime point is calculated according to the parameters, epsilon0, x(0) and U0, wherein the initial time point U0 is equal to 0; a distance x(j) between the first friction component and the second friction component at a j-th time point is obtained, the output voltage Uj of the friction generator at the j-th time point is calculated on the basis of the above parameters, epsilon0, x(j) and Qj-1, Qj is calculated according to Uj, and the output current Ij of the friction generator at the j-th time point is calculated on the basis of the output voltage Uj and resistance R, and j+1 is set to be thevalue of j; the current step is repeated until j is equal to n, wherein j is an integer greater than or equal to 1; and the output voltage Un and output current In of the friction generator at an n-thtime point are outputted. With the friction generator output electric energy calculation method, device and system of the invention adopted, the voltage and current of the friction generator can be calculated simply and efficiently.

The invention discloses a multi-split air conditioning unit control method and control system based on a digital twinning technology, and belongs to the field of heating and ventilation air conditioners. The method comprises the following steps: obtaining indoor measurement data at the given moment, and calculating the actual heat flow through a resistance-capacitance model of a functional area; calculating the actual heat flow at n-1 moments before the given moment and inputting the actual heat flow into time sequence prediction models to obtain a first predicted heat flow; obtaining indoor measurement data at n-1 moments before the given moment respectively and inputting the indoor measurement data into the three time sequence prediction models respectively to obtain indoor measurement data prediction values, and calculating a second prediction heat flow by using a resistance-capacitance model; for the given moment and n-1 moments before the given moment, linearly fitting the actual heat flow according to the two predicted heat flows to obtain a fitting function; and calculating a heat flow predicted value according to the two predicted heat flows at the target moment and the fitting function at the previous moment, and controlling an air conditioning unit in the functional area according to the heat flow predicted value. The real-time performance, the accuracy and the applicability of control over the multi-split air conditioning unit can be improved.

The invention relates to a hyperspectral classification method and system based on a graph structure. The method comprises the following steps: segmenting a hyperspectral image into N superpixels; each super pixel comprises a plurality of pixels; constructing an adjacent matrix of the graph according to the N superpixels; each element in the adjacent matrix represents the relationship between the features of each superpixel; according to the adjacent matrix, performing feature extraction on the hyperspectral image by using a double-layer graph convolution algorithm to obtain a first feature of each superpixel; learning a first feature of each superpixel by using a self-attention mechanism to obtain a second feature of each superpixel; and classifying each superpixel in the hyperspectral image according to each second feature. According to the invention, the accuracy of hyperspectral classification is improved.

The invention discloses a control system and a control method for an agaricus bisporus picking device, belongs to the technical field of agricultural engineering, and solves the problem that the existing mushroom picking technology is low in recognition degree, accuracy and picking rate. The system comprises an electric control loop and a pneumatic loop, the electric control loop comprises a main controller, a picking module, an undercutting module, a moving module and a visual module, and the picking module, the undercutting module, the moving module and the visual module are respectively connected with the main controller; the picking module comprises a picking motor, a motor driver A, a two-position three-way reversing valve, a relay A and a tension and compression sensor; the moving module is used for moving the picking module; the pneumatic loop comprises an air pump, a filtering-pressure regulating-lubricating unit, a four-position flow control valve seat, a Z-direction double-acting pneumatic cylinder, an undercut double-acting pneumatic cylinder, a negative pressure generator and a suction cup. The mushroom picking device is suitable for picking clustered and high-density mushrooms.

The invention discloses a planar marker pose determination method and device, a computer readable storage medium and electronic equipment. The method comprises the following steps: taking a planar marker in at least one frame of image; obtaining a first coordinate of the vertex of the plane marker in a pixel coordinate system; and obtaining a plane marker coordinate system and a second coordinateof the vertex of the plane marker in the plane marker coordinate system according to the plane marker. According to the pose determination method disclosed by the invention, lightweight construction of the planar marker is realized, and the obtained optimized planar marker pose can be effectively ensured to have good accuracy, so that the construction effect of the planar marker is improved.

The invention relates to data standardization of medical data sources, in particular to a medical information data item name standardization method and system, equipment and a medium, which can automatically standardize data of a plurality of data sources from a literal description level, is reasonable in design, simple in processing and high in adaptability, greatly liberates manpower and improves efficiency. The method comprises the following steps: unifying and de-duplicating acquired initial data item names of a plurality of medical information data sources in a character level to obtain data items with different names; constructing an n-gram feature set of each data item according to the number of characters of the name of each data item; according to the n-gram feature set of each data item, obtaining a character level-based name similarity between every two data items, and constructing a similar matrix; and clustering the data items greater than a similarity threshold in the similar matrix, and assigning the same standardization name for all the data items in each cluster for standardization.

The invention belongs to the field of optical three-dimensional measurement, particularly relates to a calibration method of a line structured light three-dimensional measurement system, aims to solve the problems of small application range, high cost, large calculation amount, low efficiency and the like of the existing calibration method of the line structured light three-dimensional measurement system, and eliminates the influence of lens distortion on measurement precision. The method mainly comprises the following steps: building a plane calibration plate required by calibration; moving the plane calibration plate or the linear structured light three-dimensional measurement system, and taking a picture; moving the plane calibration plate or the linear structured light three-dimensional measurement system, projecting coding structured light, and taking a picture; calibrating the camera, and obtaining a plane equation of the plane calibration plate in a camera image plane coordinate system; and calculating three-dimensional coordinates of imaging points, fitting a curved surface equation, and calibrating the projector. According to the curved surface equation, the calculated amount of curved surface fitting is simplified, the overfitting problem which is extremely prone to occurring in a conventional second-order curved surface equation is avoided, and compared with the conventional second-order curved surface equation, the spatial model of the structured light curved surface can be described more accurately.