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186 results about "Enhancement Technologies" patented technology

Autonomous navigation signal enhancement method based on low-earth-orbit satellites

ActiveCN108919312AStrong invulnerabilityGood autonomous navigation abilitySatellite radio beaconingLow earth orbitGround station
The invention discloses an autonomous navigation signal enhancement method based on low-earth-orbit satellites. The method is implemented by use of a load carried on the low-earth-orbit satellites, wherein the load comprises a GNSS receiving module, a main control module, an emission module, a high-stability clock module, at least one set of GNSS signal receiving antennas and at least one set of enhancement information emission antennas; the GNSS receiving module is used for capturing and tracking navigation satellite signals and performing on-satellite autonomous orbit determination and autonomous time service; the main control module is used for interacting data with the GNSS receiving module and the emission module; the emission module is used for coding result data of on-satellite autonomous orbit determination and autonomous time service into telegraph texts and performing signal modulation and broadcasting; and the high-stability clock module is used for providing a time-frequency benchmark. According to the method, by uniting low-earth-orbit satellite navigation enhancement information and the navigation satellite signals to perform navigation positioning, the precision, availability and reliability of navigation positioning can be effectively improved. Besides, the method does not depend on a ground station, so that application is more flexible compared with a ground-based enhancement technology.
Owner:WUHAN UNIV

Service data real-time monitoring system and method based on Java byte code enhancement technology

The invention discloses a service data real-time monitoring system and method based on a Java byte code enhancement technology. The system comprises the components: a monitored application side, Agentbeing deployed in a JVM, when the application program is loaded into the JVM, the Agent modifying and loading the class of the JVM by using ASM, codes of various events and measurement values being dynamically inserted and collected when the application program runs, the newly-added codes executing and obtaining various data and then sending the data to the monitoring platform side, and the Agentperiodically obtaining and executing instructions such as starting and stopping of the Agent and thread analysis issued by the monitoring platform side; a monitoring platform side, used for acquiringthe data of the monitored application side, processing the acquired data and putting the processed data into message queues with different themes of the message middleware according to data types, aconsumer acquiring the data processing from the message queues according to the different themes and performing pre-computation on the data of the themes according to time windows and dimensions by utilizing stream computation; and a user side obtaining the calculation result and outputting the calculation result.
Owner:CHINA TELECOM SHANGHAI IDEAL INFORMATION IND GRP

Low-illumination image processing method and device

The invention provides a low-illumination image processing method and device. A noise suppression filter is additionally arranged before operation of contrast enhancement by aiming at a problem of noise amplification existing in an original low-illumination image contrast enhancement technology, and smoothing is performed on the inverse color image of a low-illumination image by adopting a first filtering coefficient and a second filtering coefficient so that image contrast is enhanced and random noise is suppressed simultaneously. Texture and noise level parameters of the image are calculated according to the local block interior characteristics of the image. Weighted averaging is performed on a first smooth image and a second smooth image after smoothing according to the texture and the noise level parameters. A texture image is obtained by performing texture structure extraction on the gradient image of the inverse color image, and the texture image is combined with the weighted image and the weighted image is sharpened so that the effect of enhancing image details can be realized. Therefore, contrast of the low-illumination image can be effectively enhanced, various types of noise can be filtered, the image color and details can be retained and thus a clear and lifelike restored image can be obtained.
Owner:PEKING UNIV SHENZHEN GRADUATE SCHOOL

Prior signal-to-noise ratio estimating method based on MMSE error criterion

The invention discloses a prior signal-to-noise ratio estimating method based on an MMSE error criterion and used for voice enhancement, and belongs to the technical field of voice signal processing. Aimed at the prior signal-to-noise ratio estimating problem in the voice enhancement technology, the method comprises the steps of: firstly carrying out preliminary estimation on a prior signal-to-noise ratio of noised voices based on the MMSE error criterion, carrying out Wiener filtering calculation on an obtained prior signal-to-noise ratio estimated value to obtain a first system gain factor, carrying out calculation on the first system gain factor an amplitude spectrum value of the noised voices to obtain a voice power spectrum estimated value, then utilizing the obtained voice power spectrum estimated value and a power spectrum estimated value of noise to carry out estimation once again, and obtaining a final prior signal-to-noise ratio estimated value. The prior signal-to-noise ratio estimated value is substituted into a subsequent voice enhancing step for processing, and de-noised estimated voice clearing signals are obtained. The prior signal-to-noise ratio estimating method based on the MMSE error criterion can effectively inhibit background noise components in estimated cleared voices, and excessive damages to the cleared voice components are avoided, so that the hearing quality of the estimated cleared voices is improved, and the performance of a voice enhancement algorithm is improved.
Owner:SYSU CMU SHUNDE INT JOINT RES INST +1

Accurate drawing method for omnidirectional object contour

ActiveCN105574933ASmall contour deformationContour drawing works well3D modellingEnhancement TechnologiesAngle of view
The invention discloses an accurate drawing method for an omnidirectional object contour, and belongs to the fields of image displaying and processing. The accurate drawing method comprises the following steps: exporting three-dimensional coordinates of various nodes of a stereoscopic model; recording viewing angle parameters; generating an orthographic projection contour layer; erecting the object and calculating the three-dimensional contour of the object; carrying out viewing angle conversion and calculating the projection contour; merging self-intersected polygons and simplifying the internal structure of the contour; judging an occlusion relation and deleting overlapping shadows; and carrying out smooth processing. The accurate drawing method for the omnidirectional object contour is simple in algorithm and short in elapsed time; the extracted object contour is small in deformation; the contour drawing effect for an irregular object is good; overlapping can also be eliminated; and the overall extraction effect is improved by smooth processing on the contour. The accurate drawing method for the omnidirectional object contour not only can be applied to a reality enhancement technology, but also can be applied to a virtual simulation system and a GIS.
Owner:广州博进信息技术有限公司

Combined type environment-friendly device using MVR-bipolar electrolysis-biological enhancement technology

The invention discloses a combined type environment-friendly device using the MVR-bipolar electrolysis-biological enhancement technology. The combined type environment-friendly device comprises a preprocessing unit, an evaporating and concentrating unit, a biochemistry unit and a bipolar electrolysis processing unit, wherein the preprocessing unit, the evaporating and concentrating unit, the biochemistry unit and the bipolar electrolysis processing unit are connected with one another through a pipeline. An MVR unit conducts proper concentration on industrial waste water through the steam recompression technology, distilled water can be recycled or discharged according to the standard, and a concentrated solution enters the bipolar electrolysis processing unit. The mesh-shaped unit type structural design is adopted for the units, the water flow short circuit can be avoided, the mass transfer effect is improved, the oxidoreduction efficiency is ensured, and therefore pollutants are thoroughly removed. An on-line bacterium throwing type membrane biological fixing system is adopted for a biological unit. PVA floating fillers where special efficient bacterium strains are attached are fixed in a biochemical pool, and the organic matter removing effect is enhanced through a timed on-line bacterium throwing system. The combined type environment-friendly device is an integrated device, and the wastewater treatment efficiency and the standard reaching effect are greatly improved when the MVR-bipolar electrolysis-biological enhancement technology is combined with a traditional wastewater treatment technology.
Owner:TIANJIN UNITED ENVIRONMENTAL ENG DESIGN

Enhanced transmission method based on stratospheric quasi-static satellite base station

The invention relates to coverage enhancement technology in the field of satellite communication, and discloses an information transmission method based on a stratospheric quasi-static satellite base station, which comprises steps: (1) the stratospheric quasi-static satellite base station is formed by a stratospheric floating system, a communication load system and an operation control system, has small movement relatively to the ground, and can be deployed according to needs over a region with a satellite signal coverage enhancement requirement for providing long-time stable transparent forwarding or communication forwarding treatment service for various satellite users; and (2) the stratospheric quasi-static satellite base station distributes communication resources according to user types and service types, provides in-base station transmission service for communication between users in the current base station coverage region, provides inter-base station transmission service for communication outside the base station coverage region, signals are relayed and transmitted by the satellite via the base station, and subsequent communication transmission is completed via the satellite. Space and cost advantages of the stratospheric quasi-static satellite base station are used for providing convenient and high-efficiency coverage enhancement ability for satellite communication.
Owner:军事科学院系统工程研究院网络信息研究所

Method for navigation positioning by use of digital frequency modulation broadcasting

The invention discloses a method for navigation positioning by use of digital frequency modulation broadcasting and belongs to the field of wireless navigation. The method comprises the following steps: realizing time synchronization among frequency modulation broadcast transmitters; the frequency modulation broadcast transmitters carrying wireless signals RF(t) whose navigation messages can be used for range finding; the frequency modulation broadcast receivers receiving wireless signals RF(t) broadcast by the multiple frequency modulation broadcast transmitters and parsing the navigation messages contained in the RF (t); and the frequency modulation broadcast transmitters using the navigation messages and the signals of themselves to perform positioning solution so as to obtain positions of themselves. Compared to the prior art, the method provided by the invention has the following advantages: the emission power of the frequency modulation broadcast transmitters is large, the indoor coverage capability is higher compared to space-based navigation and space-based navigation enhancement technologies; and the frequency modulation broadcasting bandwidth is small, and the receiver complexity is low, therefore, the cost is lower and the popularization is easier.
Owner:SHENZHEN SIKAIWEI ELECTRONICS CO LTD

Scalp electroencephalogram feature extraction and classification method based on end-to-end convolutional neural network

The invention discloses a scalp electroencephalogram feature extraction and classification method based on an end-to-end convolutional neural network, and the method comprises the steps: carrying out the data enhancement of training data, and enabling the enhanced training data to train the convolutional neural network; inputting the to-be-detected data into the convolutional neural network for feature extraction and classification. The feature extraction and classification method comprises the following steps: S1, filtering an original scalp electroencephalogram signal by using a band-pass filter to obtain signals xtheta, xmu and xbeta; S2, performing multi-scale time convolution and spatial convolution on the signals xtheta, xmu and xbeta respectively to extract features; s3, performing pooling operation on the feature map output by the convolutional layer; s4, after pooling, carrying out feature fusion, and then sending the feature fusion to a full connection layer to integrate the input abstract features; and S5, sending the output of the full connection layer to a softmax layer for classification. According to the method, a brand new data enhancement technology is applied in a training stage, data is input into a plurality of convolutional neural network branches for multi-scale convolution operation after passing through a filter bank in a test stage, the overfitting phenomenon is reduced, and the classification accuracy is improved.
Owner:周军

Raman spectrum enhancement measuring system

InactiveCN108169211AMake up for the lack of enhancement effectSolve nonlinear problemsRaman scatteringLaser lightEnhancement Technologies
The invention discloses a raman spectrum enhancement measuring system which comprises a grating spectrometer, a light emitting/receiving probe, a sample tank and a laser light source, wherein the sample tank is a liquid core waveguide tube sample tank, the liquid core waveguide tube sample tank comprises a liquid core waveguide tube, the liquid core waveguide tube is arranged in a sealed chamber,an incidence window is arranged on the sealed chamber and at the position right facing a pipe opening of the liquid core waveguide tube, an emergence window is arranged on the sealed chamber and at the position right facing the other pipe opening of the liquid core waveguide tube, the laser light source can irradiate the incidence window of the sample tank through an exciting light path in the light emitting/receiving probe, and the emergence window of the sample tank can irradiate the grating spectrometer through a signal detecting light path in the light emitting/receiving probe. The raman spectrum enhancement measuring system disclosed by the invention can solve nonlinear and uneven enhancement phenomena in gold, silver and the like nano enhancement technologies and makes up the problemthat an enhancement effect of liquid core waveguide is insufficient at the same time, so that the raman enhancement technology can achieve better application in pesticide residue detection.
Owner:PLANTS & ANIMALS & FOOD TESTING QUARANTINE TECH CENT SHANGHAI ENTRY EXIT INSPECTION & QUARANTINE BUREAU +1
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