141 results about "Scale function" patented technology

A method and system for multi-scale anatomical and functional modeling of coronary circulation is disclosed. A patient-specific anatomical model of coronary arteries and the heart is generated from medical image data of a patient. A multi-scale functional model of coronary circulation is generated based on the patient-specific anatomical model. Blood flow is simulated in at least one stenosis region of at least one coronary artery using the multi-scale function model of coronary circulation. Hemodynamic quantities, such as fractional flow reserve (FFR), are computed to determine a functional assessment of the stenosis, and virtual intervention simulations are performed using the multi-scale function model of coronary circulation for decision support and intervention planning.

The temperature distribution associated with a design of an integrated circuit is calculated by convoluting a surface power usage represented by a power matrix with a heat spreading function. The heat spreading function may be calculated from a simulation of a point source on the integrated circuit using a finite element analysis model of the integrated circuit or other techniques. To account for spatial variations on the chip, the heat spreading function may be made dependent on position using a position scaling function. Steady-state or transient temperature distributions may be computed by using a steady-state or transient heat spreading function. A single heat spreading function may be convolved with various alternative power maps to efficiently calculate temperature distributions for different designs. In an inverse problem, one can calculate the power map from an empirically measured temperature distribution and a heat spreading function using various de-convolution techniques. While the forward problem is analogous to image blurring, the inverse problem is analogous to image restoration.

A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small.

A real-time approximately 360 degree image correction system and a method for alleviating distortion and perception problems in images captured by omni-directional cameras. In general, the real-time panoramic image correction method generates a warp table from pixel coordinates of a panoramic image and applies the warp table to the panoramic image to create a corrected panoramic image. The corrections are performed using a parametric class of warping functions that include Spatially Varying Uniform (SVU) scaling functions. The SVU scaling functions and scaling factors are used to perform vertical scaling and horizontal scaling on the panoramic image pixel coordinates. A horizontal distortion correction is performed using the SVU scaling functions at at least two different scaling factors. This processing generates a warp table that can be applied to the panoramic image to yield the corrected panoramic image. In one embodiment the warp table is concatenated with a stitching table used to create the panoramic image.

The invention relates to a laser shaping method of a multi-scale functional surface of micronano for semiconductor material, relating to micronano material preparation and laser micromachining technical field; the invention aims at providing a method and a device for preparing femtosecond laser of super-hydrophobic functionalization for microstructural surface based on the semiconductor material and through the systematically technical design of multi-scale surface micro-shaping and microstructural surface processing, and realizing optional and controllable preparation of semiconductor material surface having multi-scale microstructure such as micron, submicron and nano. The invention solves the technical problems such as high cost, low efficiency and difficult operation in traditional preparation methods of microstructural surface with super-hydrophobic function.

The invention relates to a method and a device for analyzing the reliability of an integrated circuit. In the analytical method, a unit circuit delayed aging stochastic analysis reference model in consideration with both negative bias temperature instability (NBTI) effect and process parameter perturbation is established, a scaling function and an equivalent aging time concept are provided to solve the delayed statistical distribution of a unit circuit under the actual work environment quickly from the reference model, and the pre-clipping process of the circuit is provided to reduce the complexity of reliable analysis. The device of the invention comprises an input unit, an output unit, a program storage unit, an external bus, a memory, a storage administration unit, an input/output bridging unit, a system bus and a processor. In the method and the device, the effect of the process parameter perturbation, the NBTI effect and the work environment of the circuit on reliability are considered simultaneously, and the complexity of the reliable analysis can be reduced effectively by utilizing the scaling function, equivalent aging time and the pre-clipping technology so as to realize the quick analysis on the reliability of super-large-scale integrated circuits in consideration with process deviation.

The invention discloses a solar energy water heater with a self-cleaning vacuum tube water scale function. The solar energy water heater comprises a water box, a base and vacuum tubes arranged betweenthe water box and the base, wherein the base is internally provided with a round cavity arranged in the horizontal direction, the lower end of each vacuum tube is provided with a rolling ball screw rod in a running through manner, joints between the rolling ball screw rods and the corresponding vacuum tubes are in seal rotating connection, the lower end of each rolling ball screw rod is fixedly connected with a gear, the inner wall of the round cavity is slidably connected with a toothed bar engaged with the gears, the round cavity is internally provided with a pushing mechanism used for pushing the toothed bar to move, the pushing mechanism comprises a first stretching and contracting air bag arranged inside the round cavity, and the first stretching and contracting air bag is internallyprovided with a second stretching and contracting air bag. The solar energy water heater with the self-cleaning vacuum tube water scale function is novel in conception, water scale on the inner wallsof the solar energy vacuum tubes can be removed, and the heating efficiency and service life of the solar energy vacuum tubes are guaranteed.

Function spaces defined by scaling functions are used to generate bandlimited noise octaves and other attribute data sets. Scaling functions are basis functions that admit multiresolution analysis and include piecewise constant scaling functions, piecewise polynomial scaling functions, bandlimited scaling functions, Daubeschies scaling functions, as well as other multiresolution analysis scaling basis functions known to those of skill in the art. Scaling basis functions can be locally supported or have infinite support. The properties of the scaling basis functions used to construct bandlimited noise octaves may ensure that any bandlimited noise octave at resolution level N is orthogonal to bandlimited noise octaves and their associated scaling basis functions at all resolution levels less than N. Bandlimited noise octaves can be scaled to any resolution level and guaranteed to have no effect on images at any lower resolution level.

The invention relates to a fitness scaling method for improving overall search capability of a genetic algorithm, wherein a logarithmic function serves as a scaling function, and the fitness of every individual of every generation during population evolution is re-adjusted through logarithm arithmetic, so as to reduce the influence of a super individual on the population evolution, further avoid the premature convergence in the genetic algorithm and improve the overall search capability of the genetic algorithm.

The invention discloses a large-squint high-resolution SAR imaging method based on a distance-azimuth circle model. The method comprises the following steps: 1, constructing an SAR system geometric model to obtain an echo signal; 2, carrying out the range direction preprocessing of the signal in a frequency domain; 3, constructing the distance-azimuth circle model according to a range direction preprocessing result, and describing the azimuth space-variant characteristics of the SAR signal; 4, modeling an azimuth space-variant part in a remaining high-order RCM through a result given by the distance-azimuth circle model, and constructing a new variable-scale function to implement QRCMC, and then designing a distance compressing filter and completing all the processing in the distance direction; 5, modeling the azimuth space-variant characteristics of a Doppler phase according to the distance-azimuth circle model, achieving azimuth equalization through using an ENLCS algorithm, finallydesigning a filter for azimuth compression, and obtaining a final focused image. The method has a better focusing effect during the processing of large-squint and high-resolution echo data.

A method of identifying colon polyps in a digital volume, wherein the volume includes a plurality of values corresponding to a domain of points in a 3D space, is provided. The method includes selecting a mother wavelet scaling function that corresponds to a polyp; performing a forward wavelet transformation on the volume to obtain a set of wavelet coefficients, wherein each wavelet coefficient is associated with a length scale; determining, for each length scale, a transformation magnitude; and forming, for each length scale, a transformed set of wavelet coefficients associated with the length scale. An inverse wavelet transform is performed on the transformed wavelet coefficients for each length scale to obtain a reconstructed volume, and the reconstructed volume is analyzed for the existence of polyps.

A process for small-diameter coil pipe double-sided enamel is carried out by cleaning internal surface, grouting for inner pipe, enamel sintering for inner pipe, cleaning external surface, coating enamel onto external surface, enamel sintering for external pipe and forming coil pipes with sintered enamel coatings on internal and external surfaces. The enamel layer is compact, metal pipe substrates are firm. It has long life and excellent anti-scale function.

The invention discloses a rubbing acoustic emission denoise method based on empirical wavelet transform. The method comprises the following steps that (1) an acoustic emission signal is acquired through a rubbing acoustic emission experimental device; (2) adaptive partition is performed on the acoustic emission signal according to the Fourier spectrum features; (3) a wavelet window is added after partition, and an empirical scale function and an empirical wavelet function are defined; (4) empirical wavelet transform is defined; and (5) wavelet denoising is performed on each empirical mode component fi and then reconstruction is performed based on EWT. The beneficial effects of the rubbing acoustic emission denoise method based on empirical wavelet transform are that adaptive partition is performed according to the Fourier spectrum of the acoustic emission signal, and a wavelet filter bank is constructed to extract different intrinsic mode components included in the acoustic emission signal so that less modes are decomposed and the phenomena of mode aliasing and endpoint effect can be effectively filtered; and wavelet denoising is performed on each empirical mode component, reconstruction is performed based on EWT and denoising is performed on the signal so that the denoised signal has high signal-to-noise ratio and the denoise effect is obvious.

The hand held scale of the present invention comprises a rectangular casing with a weighing platform, for supporting items to be weighed, a display screen, for displaying the weight of the objects and to view the animation sequences. There are a series of digital animations that are viewable on the display screen and each different animation sequence corresponds to a particular scale function or operation. The user is amused and entertained with animation when the scale is turned on, objects are weighed, the scale is turned off, reset as well as other functions.

A pixel compositor device for routing an incoming stream of pixel data having been rendered elsewhere and bound for being projected. The device includes a plurality of digital signal inputs each adapted for receiving a plurality of pixel information from the incoming stream of pixel data. The digital signal inputs are in communication with at least one buffer for the pixel information once received by the device. A processing unit is included for image warping the pixel information by performing, on each of a respective of the pixel information: (i) a mapping relating to location of the respective pixel information, and (ii) a scaling function. The geometric mapping can be performed by applying an interpolation technique; and the scaling function can be any of a number of photometric correction functions (alpha-blending, color uniformity correction, image brightness or contrast adjustment, etc.). Once an image warping has been performed on the respective pixel information, it is routed out of the device through one of several digital signal outputs. A system for routing pixel data is disclosed having two or more of the pixel compositor devices in communication with an image rendering cluster of units (as the source of the incoming stream of pixel data) and a plurality of projectors; as is a method for routing an incoming stream of pixel data having been rendered elsewhere and bound for being projected.

Disclosed in the invention is a Mallat algorithm-based marine gravity measurement error eliminating method. The method comprises the following steps: obtaining latitude, course, and ship speed information outputted by an inertial navigation system as well as a gravity signal measured by a gravity meter in real time; calibrating an initial parameter of the gravity meter; selecting a wavelet function and calculating a scaling function phi (t) and a wavelet function psi (t); calculating coefficients of a high-pass filter and a low-pass filter; carrying out decomposition on the gravity signal by using a Mallat algorithm according to the selected filter coefficients and selecting a decomposition level number; according to a signal to noise ratio of an original signal, calculating a heuristic SURE threshold value and carrying out noise reduction on the gravity signal based on a soft threshold method; reconstructuring the gravity signal after noise reduction, calculating an Etvs correction value by utilizing the information outputted by the inertial navigation system and carrying out filtering processing on the Etvs correction value; and carrying out Etvs correction on the gravity signal after the reconstruction. According to the invention, a defect of insufficient real-time performance during the gravity measurement can be overcome; a main error during the gravity measurement can be eliminated; and the gravity signal precision is improved.