68results about How to "Calculations are simple" patented technology

The motor controller drives an electric motor including a rotor as a field magnet and stator coils of U-phase, V-phase and W-phase. The motor controller includes an exploration voltage application unit for applying an exploration voltage to the stator coils of U-phase, V-phase and W-phase such that a voltage vector expressed by the voltage applied to the stator coils rotates in a predetermined cycle with maintaining a constant magnitude, an electric current detection unit for detecting an electric current flowing through the electric motor during the period in which the exploration voltage is applied by the exploration voltage application unit, and a rotor rotation angle estimation unit for estimating a rotation angle of the rotor based on a phase of the voltage vector when a magnitude of the electric current detected by the electric current detection unit takes a local maximum value.

The invention relates to a scale adaptive kernel correlation filter fast target tracking method. According to the scale adaptive kernel correlation filter fast target tracking method, separation of afront background is promoted and a scale estimation module is added through introducing a two-dimensional variable bandwidth Gaussian window into a KCF framework, scale variations of a target are estimated according to a matching result of feature points of an image block, and whether the target is sheltered is judged by combining displacement prediction based on the scale variations. Once the target is sheltered, the user considers that no scale conversion occurs at the moment and template update is not performed, further the tracking precision is enhanced in this way. The scale adaptive kernel correlation filter fast target tracking method has the advantages of simple and fast calculation, and can significantly improve the calculation efficiency on the basis of compatible scale adaptation.

A map display device and a map display method, in which a building in a map is formed as a pseudo three-dimensional figure and arithmetic processing to display the figure as a bird's-eye view is simplified. The map display device 20 for displaying map data, formed from vector data, on a display means has a plane figure-for-bird's-eye-view creation means 218, a shift amount storage means 219, a building position determination means 220, and a figure data copying means 221. The plane-figure-for-bird's-eye-view creation means 218 creates, from the map data formed from vector data, a plane figure for creating a bird's-eye view. The figure data copying means 221 copies and draws the plane figure to display a bird's-eye view. This is performed based on the positions of buildings determined by the building determination means 220 and on the shift amounts stored in the shift amount storage means 219, and in this process, the plane figures are shifted upward on a display screen according to the shift amounts, and the copying and drawing are made one by one from a building positioned on the far side in the bird's-eye view.

A method and a system for scaling a digital source image consisting of a grid of X by Y pixels into a target image of a different resolution comprises the steps of/tools for: mapping the source pixels onto the target pixels; scaling the source image in the X or Y direction to produce intermediate pixels that are scaled in one direction by determining contributions to each intermediate pixel using a digital filter and accumulating the contributions for each intermediate pixel, wherein each source pixel contributes to one or more intermediate pixels and each intermediate pixel receives contributions from one or more source pixels; and subsequently scaling the intermediate pixels in the other direction by determining the contributions to each target pixel using the filter and accumulating the contributions for each target pixel; wherein each intermediate pixel contributes to one or more target pixels and each target pixel receives contributions from one or more intermediate pixels. The method is preferably carried out on a PE array in an SIMD (Simple Instruction Multiple Data) device.

Provided is a radiation tomography apparatus that performs radiography for a series of fluoroscopic images while moving a radiation source and a radiation detecting device synchronously in opposite directions to each other and obtains a tomographic image of a subject based on the fluoroscopic images. The radiation tomography apparatus allows to preview the tomographic image obtained through the radiography immediately after completion of the radiography. A preview image for previewing a sectional image of a subject is generated besides a tomographic image for diagnosis. The preview image can be obtained through simpler computing processing. Consequently, an operator sees once the preview image displayed on a display unit prior to the tomographic image for diagnosis, thereby determining to conduct radiography again quickly.

The invention discloses a singular value decomposition(SVD)-based image quality evaluation method, which comprises the following five steps of: 1, respectively dividing an original image and a distorted image with the size of m*n into m*n/k*k image blocks; 2, programming all the image blocks according to an SVD principle so as to implement SVD; 3, calculating structural distortion in left and right singular vectors U and V and U(p) and V(p) of the image blocks of the original image and the distorted image, and simultaneously calculating brightness distortion in singular value characteristic vectors S and S(p) of the image blocks of the original image and the distorted image; 4, integrating the brightness distortion and structural distortion of the image blocks of the original image and the distorted image to obtain a formula D1, performing cycle calculation to obtain D1 values of all m*n/k*k image blocks, and solving a mean value; and 5, integrating the image quality evaluation parameters, defining an SVD-based image quality evaluation index, wherein when a QSVD value is zero, the image quality is the best, the QSVD value is increased with the change of QSVD, and the image quality is worse. The SVD-based image quality evaluation method has the advantages of practical value and wide application prospect in the field of image quality evaluation.

The invention relates to the technical field of medical treatment detection and provides a dry eye detection and handheld imaging device and a dry eye detection device and detection method thereof. The dry eye detection and handheld imaging device comprises an eye positioner, a light source, a lens, a camera and a single chip microcomputer. The eye positioner is used for determining the eye position of a person to be examined. When the eye is located at the position of the eye positioner, the light source emits set-shaped light to the eye. The lens and the camera are both fixedly installed with respect to the eye positioner so that the camera can obtain a clear eye image projected by the light source, and the eye image is sent to a PC provided with a dry eye detection unit through the single chip microcomputer. The dry eye detection and handheld imaging device achieves focusing of the camera in advance by arranging the eye positioner, ensures that the lens is located at a fixed position without focusing adjustment, accordingly the size of the device is decreased, and the device can be designed to be the handheld portable device.

The results of mass spectrometry are compared; correspondences are established between individual components contained in different samples; the results of establishment of correspondences are checked; and varying components are extracted. At least two samples are compared with respect to the ion intensity corresponding to retention times and mass-to-charge ratios obtained by chromatography-mass spectrometry on the samples having a plurality of components. In ion groups observed as mass spectra, a correspondence between the retention times at which the same component is supposed to be observed is established by determining coincidence between the mass-to-charge ratios and determining that the ion intensity fall within a designated variation.

A laser beam and a servo beam are incident on a mirror and a transparent member, respectively, so that an angle direction A1 from an optical axis of the laser beam to be incident on the mirror to an incidence plane of the mirror and an angle direction A2 from an optical axis of the servo beam to be incident on the transparent member to an incidence plane of the transparent member are opposite to each other. With such layout of an optical system, scan loci of the servo beam corresponding to respective scan lines become closer to parallel. In the incidence plane and the outgoing plane of the servo beam of the transparent member, fine periodic structures tapered from the incidence plane and the outgoing plane are formed at pitches each equal to or less than a wavelength band of the servo beam. By this periodic structure, reflection of the servo beam on the incidence plane and the outgoing plane is suppressed.

The present invention comprises a partition-composition method and its equipment for online detection of transient stability of interconnected power system. The method consists of three parts. Firstly, according to the dynamic response data of the generators at the actual time, the key parameters of transient stability analysis of local areas can be obtained from local dispatch control center based on the wide area measurement system. Secondly, the key parameters of entire grid can be obtained using the uploaded parameters from the local area. Lastly, using the partition-composition method, parameters of an adjoint power system of the entire grid can be obtained. The equipment consists of 4 modules, including the first obtained module, transport module, the second obtained module and the composition module. Using these modules, transient stability data of entire grid can be obtained exactly without the limitation of network topology, system model and parameters. The present invention can be a beneficial and potential tool for the online analysis of power system transient stability with higher computation speed and lower storage requirement.

Compressed air in a temperature equalizing container (2) is discharged to a sample pneumatic apparatus (100) where temperature response to time is measured and a time function of heat transfer coefficient is determined. In a flow rate operating process, flow rate of the sample pneumatic apparatus (100) is determined from pressure response to time using the function of heat transfer coefficient. Since a flow rate operating expression used in the flow rate operating process is provided with a correction term introduced with energy equation in the temperature equalizing container (2), an accurate flow rate can be measured even if temperature in the temperature equalizing container (2) is not equalized strictly.

A three dimensional image processing program, a three dimensional image processing method, and a video game device are provided that can render a large number of objects. A graphics data generating processor computes the post-movement position coordinates of objects in a virtual three dimensional space, modifies the post-movement position coordinates of objects calculated thereby such that the position coordinates are kept inside a display area in which the objects are displayed, and a rendering processor renders the objects inside the display area.

The invention discloses a face recognition method and a mobile terminal. The face recognition method comprises the following steps: obtaining image data of a video image output by a camera by a mobile terminal and extracting illumination data from the image data; confirming a coordinate position of a recognized face in the corresponding video image by using a face recognition algorithm according to the illumination data; confirming the display size and the display position of the recognized face on a screen of the mobile terminal according to the size of the corresponding video image of the recognized face, the size of the screen of the mobile terminal and the coordinate position of the recognized face in the corresponding video image; displaying the recognized face on the screen of the mobile terminal. The face recognition method and a face recognition system can realize the face reorganization by the mobile terminal at low cost.

The invention discloses a plate structure-sound field coupling analysis method. The method includes the steps that a finite element method and a radial point interpolation method are combined, and dispersing is conducted on a system kinetic equation of a plate structure; a boundary integral equation of a sound field domain is established according to a boundary element method; a structure-sound field coupling equation is established according to a dispersed system kinetic equation, the boundary integral equation and the structure-sound field coupling boundary condition. The invention further discloses a plate structure-sound field coupling analysis device corresponding to the plate structure-sound field coupling analysis method and a computing device with the plate structure-sound field coupling analysis device.

A distance acquisition device is for acquiring a first rounded distance from a reference point to a basis point, and for subsequently acquiring a second rounded distance from an adjacent point to the basis point. The reference, adjacent, and basis points are disposed on a plane. The adjacent point is adjacent to the reference point. The distance acquisition device includes: a reference distance acquisition unit for acquiring a precise distance from the reference point to the basis point, and for subsequently performing rounding upon the precise distance so as to obtain the first rounded distance; a reference error acquisition unit for obtaining a first reference error corresponding to a difference between the precise distance and the first rounded distance; and a distance estimating unit for setting the second rounded distance based on the first rounded distance and the first reference error.

The invention discloses a rapid MSK communication detection demodulation method, and relates to an easy and rapid MSK communication detection and information blind demodulation reduction method. A user judges whether target communication exists or not and completes information demodulation reduction according to analysis of output signals of a monitoring/reconnaissance receiver in the certain radio environment and extraction of key parameters. The method comprises the steps that a non-cooperative receiver searches for and scans a related frequency band, the computation complexity is low, and software and hardware are easy to obtain. Meanwhile, the information blind demodulation reduction method is a non-coherent detection method. According to the rapid MSK communication detection demodulation method, complex operation processing of carrier phase synchronization is avoided by achieving demodulation reduction of unknown information, meanwhile, the requirement for system carrier frequency estimation accuracy is low, a certain error is allowed to exist in carrier frequency estimation, and the requirements that deviation possibly exists in the working frequency in actual communication and the signal to noise ratio received by non-cooperative communication is low are met.

A radar device comprises a transmitter, a receiver, a first radar image production component, a second radar image production component, a display component, and an echo width adjuster. The transmitter transmits a pulse signal. The receiver receives an echo signal during a transmission and reception period of the pulse signal. The first radar image production component produces a radar image of a first display range on the basis of the echo signal. The second radar image production component produces a radar image of a second display range that is wider than the first display range on the basis of the echo signal. The display component selectively or simultaneously displays the radar image of the first display range and the radar image of the second display range. The echo width adjuster adjusts pulse width of echo included in the radar images or the echo signal according to the display range of the radar image.