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

301 results about "Data resolution" patented technology

Digital amplifier with improved performance

A class D amplifier uses a summation of two or more PWM output stages to achieve an increased dynamic range and improved linearity for any given clock operating speed. The amplifier accepts a digital data stream as its input, such as from a compact disk, or other compatible media, at a data rate, Fa, that could be 44.1 kHz, 96 kHz, or any other rate appropriate for audio data. In the preferred embodiment, the input audio data resolution, N bits, would be split into two data samples, of J and K.Internal switching frequency, Fs, switches the PWM with an over sampling factor M, where Fs=M*Fa. The time resolution of the PWM is determined by a precision oscillator that operates at Fc=Fs*(max(J,K)-log2(M)+1).The J most significant bits would be routed to a power PWM stage operated at a DC voltage of VHI. The K least significant bits are routed to a finesse PWM stage operated at a DC voltage of VLO.The ratio of VLO to VHI will be appropriate for the ratio of K and J so the summation of the power PWM stage and the finesse PWM stage will provide the full range of N bits. This summation is accomplished with a low pass filter and time-division multiplexing of the two PWM stages.A micro controller (MCU) is used to apply a sample packet distribution algorithm to provide more resolution by reducing quantization noise in the audio band of interest. The MCU is also used to calibrate the VLO or VHI, or to calibrate the PWM timing of the two PWM stages to achieve appropriate performance.
Owner:GROVES JR WILLIAM HARRIS +1

Universal distributed airborne equipment health management simulation platform and implementation method thereof

The invention discloses a universal distributed airborne equipment health management simulation platform and an implementation method thereof, and the simulation platform adopts the mediator pattern and mainly comprises three parts of a simulation manager, a simulation member driver and simulation members, wherein the simulation manager is responsible for managing information of all the simulation members, receiving and sending data and carrying out data resolution work; the simulation member driver is used for loading and running all the simulation members and implementing information interaction between the simulation members and the simulation manager; and the simulation members are used for implementing various data calculation and completing the function of the health management technology. The simulation platform is implemented on the basis of a.net framework, on the one hand, the simulation platform can realize the separation between the development of a simulation member object and algorithm model and the interaction design of the simulation members, on the other hand, the simulation platform can highly multiplex the information interaction of the simulation members and software codes for driving the model, thereby not only reducing the workload, but also reducing the complexity in development work.
Owner:BEIHANG UNIV

Frequency division matched filtering method for improving offshore seismic data resolution by utilizing seismic focuses of different depths

The invention discloses a method for improving offshore seismic data resolution by utilizing air gun seismic focuses of different depths. The method is characterized in that air guns are respectively arranged in positions of different depths to be excited, the near-field wavelet of each seismic focus is recorded, and a far-field wavelet is obtained through simulation; and because of the existence of an offshore strong wave impedance interface, trap points occur on the frequency spectrum of each far-field wavelet, the high-frequency information of air gun seismic focuses at superficial parts is rich, the low-frequency advantages of seismic focuses at deep parts are obvious, and periodic extension is formed. The spectral analysis is carried out on the far-field wavelets to determine the dominant frequency band of each wavelet, the high-frequency dominant section of the wavelet at a superficial part is kept unchanged, the far-field wavelet of the seismic focus at a deep part is expected to be output only at the low-frequency end, and a frequency division matched filter is obtained by calculation and then is applied to all seismic records acquired by the air gun seismic focuses at the superficial parts, thereby realizing the combination of advantages of wavelets of seismic focuses in two different depths, widening the frequency band of the offshore seismic data and improving the resolution.
Owner:ZHEJIANG UNIV

New path planning method based on regular grid DEM data

The present invention discloses a new path planning method based on regular grid DEM data. According to the new path planning method, the distance and the slope are used as the evaluation indexes of the path search; in order to balance the interaction between the distance and the slope, the complete function g(n) of a DA* algorithm is designed based on the distance function of the space path and the slope function constructed with the exponential function; the parameter in the function is calculated with the DEM data, and the new complete function g(n) is optimized so as to be adapted to the change of different resolutions of the DEM data; based on the same strategy and the function construction method, the new heuristic function h(n) of the DA* algorithm is constructed; and in order to improve the search efficiency of the algorithm, by setting the initial weight and dynamically adjusting the weight in the search process, the influence of the complete function and the heuristic function on the evaluation result is changed, such that the new constructed DA* path finding algorithm can efficiently search the appropriate path. According to the preset invention, the new path planning method can self-adapt to the DEM data resolution, and can be used in different application environments.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Digital amplifier with improved performance

A class D amplifier uses a summation of two or more PWM output stages to achieve an increased dynamic range and improved linearity for any given clock operating speed. The amplifier accepts a digital data stream as its input, such as from a compact disk, or other compatible media, at a data rate, Fa, that could be 44.1 kHz, 96 kHz, or any other rate appropriate for audio data. In the preferred embodiment, the input audio data resolution, N bits, would be split into two data samples, of J and K. Internal switching frequency, Fs, switches the PWM with an over sampling factor M, where Fs=M*Fa. The time resolution of the PWM is determined by a precision oscillator that operates at Fc=Fs*(max(J,K)-log2(+1). The J most significant bits would be routed to a power PWM stage operated at a DC voltage of VHI. The K least significant bits are routed to a finesse PWM stage operated at a DC voltage of VLO. The ratio of VLO to VHI will be appropriate for the ratio of K and J so the summation of the power PWM stage and the finesse PWM stage will provide the full range of N bits. This summation is accomplished with a low pass filter and time-division multiplexing of the two PWM stages. A micro controller (MCU) is used to apply a sample packet distribution algorithm to provide more resolution by reducing quantization noise in the audio band of interest. The MCU is also used to calibrate the VLO or VHI, or to calibrate the PWM timing of the two PWM stages to achieve appropriate performance.
Owner:GROVES JR WILLIAM HARRIS +1

Method for improving seismic data resolution capacity based on system identification

The invention discloses a method for improving the resolution of technical materials for earthquake based on system identification, which essentially comprises the following procedures: (I) a section of high resolution is pre-processed; (II) a model of stratum absorbing system is configured; (III) the system identification of the model of stratum absorbing system is realized, which comprises (1) the realization of the basic structure of system identification, (2) the realization of the non-parameter system model for system identification, and (3) the realization of the parameter system model for system identification; (IV) the system structure of the stratum absorbing model is proved; (V) the system response of the stratum absorbing model is worked out; (VI) the extrapolation of the 3D space of the response of the stratum absorbing model is conducted; (VII) the hi-frequency expansion of the technical materials for the ground earthquake is realized. The invention comprehensively uses the geophysical materials from different dimensions about well logging, between-well earthquake and ground earthquake, etc. to recover with high frequency and high fidelity the technical materials on ground earthquake by using a system identification method, is of great importance for the accurate description and accurate recognization of the micro structure for the reservoir stratum at the after stage of development in an oil field.
Owner:中国石化集团胜利石油管理局有限公司

Method for enhancing images based on multi-scale edge detection in wavelet reconstruction

The invention relates to a method for enhancing images based on multi-scale edge detection in anti-symmetric biorthogonal wavelet reconstruction, aiming at realizing enhancement of image edges in thereconstruction process of wavelet tower-type data resolution. The method comprises the following steps: carrying out multi-scale wavelet decomposition on images; calculating a module value graph and aphase angle graph according to a semi-construction result, carrying out module maximum value detection and threshold value processing and extracting edge images of the scale in the wavelet reconstruction of each level; enhancing corresponding edge points of the semi-reconstruction image according to the edge images; continuing reconstruction to obtain the enhanced low frequency component of the last scale; and carrying out wavelet reconstruction level by level in terms of the reconstruction enhancement process of each level starting from the level of the most coarse resolution to realize image enhancement. The method for enhancing images can be widely used in fields about improving digital images such as medical imaging, biological features recognition, vehicles driving assistance, military, man-machine interaction and the like.
Owner:UNIV OF SCI & TECH BEIJING

Device and method for observing three-dimensional DC electrical-method simulation experiment

The invention discloses a simulation experiment observation instrument by three-dimensional DC electrical-method and an observation method for simulation experiment teaching. The observation instrument consists of a microcomputer, a DC power supply source and a 256-channel data acquisition instrument. The observation instrument can carry out area observation, two-dimensional observation, four-pole observation and high-density observation. The observation instrument not only retains the measuring function of conventional electrical-method instruments, but also can complete single-electrode power supply and multi-electrode area receiving due to a multi-channel parallel-type receiving mode of the observation instrument. The observation method has the advantages of improving observation efficiency by hundreds of times than the conventional electrical-method instruments, along with simplicity, easy operation, short measuring time, high automation degree and high data resolution, so the observation method is true and reliable in obtained data. The invention can complete study on a special method for multi-electrode power supply and multi-electrode receiving according to different experimental purposes. The observation instrument not only can be used as three-dimensional electrical-method physical-model teaching experiment, but also can be used as a field observation instrument for three-dimensional electrical-method exploration.
Owner:JILIN 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