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34results about How to "Improve space coverage" patented technology

Land surface soil moisture downscaling method based on multisource remote sensing satellite merged data

The invention discloses a land surface soil moisture downscaling method based on multisource remote sensing satellite merged data and is particularly applicable to cloudy and rainy areas. The method comprises the following steps: collecting and arranging a passive microwave soil moisture data set, an LST (land surface temperature) and NDVI (normalized difference vegetation index) data set and DEM(digital elevation model) data; performing spatial interpolation on LST images with serious pixel deletion affected by cloud and rain by adopting an NDVI and DEM data set as auxiliary data to obtain aday-by-day LST data set almost totally covering a research area; constructing a mathematic relation model for microwave soil moisture with optical remote sensing LST and NDVI by a geographical weighted regression model, and obtaining a land surface soil moisture data set with high spatial resolution with the mathematic relation model. Through the adoption of the method, reliability of a descalingresult and universality of descaling in the wide-range research area are improved effectively, and precision and efficiency of wide-range space mapping and monitoring for soil moisture content in thecloudy and rainy areas are improved.
Owner:ZHEJIANG UNIV

Optimized high-speed magnetic resonance imaging method and system using hyperpolarized noble gases

A system and method for using hyperpolarized noble gases together with an appropriately designed and optimized magnetic resonance imaging pulse sequence to rapidly acquire static or dynamic magnetic resonance images. The strong magnetic resonance signal from hyperpolarized gases, combined with the present magnetic resonance imaging technique, presents the opportunity for the imaging of gases with both high spatial and high temporal resolution. One potential application for such a method is the direct, dynamic visualization of gas flow, which would be extremely useful for characterizing a variety of fluid systems. In the medical field, one such system of substantial importance is the lung. The system and method provides for visualizing regional ventilatory patterns throughout the respiratory cycle with high temporal and high spatial resolution. The low sensitivity to susceptibility artifacts permits good image quality to be obtained in various orientations. Depending on the application, temporal resolution can be traded for anatomical coverage. Such application of dynamic imaging of the lung using hyperpolarized gases will provide unique information on the physiology and pathophysiology of the lung, and has the potential for many clinically-relevant applications.
Owner:UNIV OF VIRGINIA ALUMNI PATENTS FOUND +1

Optimized high-speed magnetic resonance imaging method and system using hyperpolarized noble gases

A system and method for using hyperpolarized noble gases together with an appropriately designed and optimized magnetic resonance imaging pulse sequence to rapidly acquire static or dynamic magnetic resonance images. The strong magnetic resonance signal from hyperpolarized gases, combined with the present magnetic resonance imaging technique, presents the opportunity for the imaging of gases with both high spatial and high temporal resolution. One potential application for such a method is the direct, dynamic visualization of gas flow, which would be extremely useful for characterizing a variety of fluid systems. In the medical field, one such system of substantial importance is the lung. The system and method provides for visualizing regional ventilatory patterns throughout the respiratory cycle with high temporal and high spatial resolution. The low sensitivity to susceptibility artifacts permits good image quality to be obtained in various orientations. Depending on the application, temporal resolution can be traded for anatomical coverage. Such application of dynamic imaging of the lung using hyperpolarized gases will provide unique information on the physiology and pathophysiology of the lung, and has the potential for many clinically-relevant applications.
Owner:UNIV OF VIRGINIA ALUMNI PATENTS FOUND +1

Sea surface temperature fusing method and system

The invention provides a sea surface temperature fusing method and system, and relates to the technical field of sea information. The method comprises the following steps: acquiring stationary satellite infrared remote sensing and microwave remote sensing sea surface temperature products in preset time before a target moment and on-site observation data of a sea observation system at the target moment; preprocessing the sea surface temperature products and the on-site observation data; carrying out daily change correction on the preprocessed sea surface temperature products; carrying out deviation correction on the stationary satellite infrared remote sensing temperature products and the microwave remote sensing sea surface temperature products subjected to daily change correction; fusingthe stationary satellite infrared remote sensing temperature products and the microwave remote sensing sea surface temperature products subjected to daily change correction with the preprocessed on-site observation data, so as to obtain sea surface temperature fusing products at the target moment. The sea surface temperature fusing method and system of the embodiment of the invention are capable of obtaining the sea surface temperature fusing products with high time-space resolution, high space coverage degree, gradual time level and high accuracy.
Owner:中国人民解放军61741部队

MODIS AOD product missing data restoration method

The invention relates to an MODIS AOD product missing data restoration technology. The technology comprises the following steps of 1, performing preprocessing for remote sensing data of geometric correction, re-projection and the like of MODIS AOD data; 2, verifying the applicability of different levels of DT\DB AOD data; 3, on the basis of increasing spatial coverage degrees of two algorithm products through linear regression equations of DT and DB AOD respectively, performing AERONET precision weighted fusion; 4, further fusing data of two satellites Terra and Aqua by adopting linear regression; and 5, preliminarily restoring residual missing AOD data by adopting a space-time Kriging interpolation method. By utilizing obtained residual errors, a geographically weighted regression model is adopted for further correction, and finally a completely restored AOD data result is obtained. The technology has the beneficial effects that the spatial coverage rate of the AOD data is gradually increased on the premise of guaranteeing AOD data precision, the missing data is completely restored finally, and reliable support is provided for subsequent application.
Owner:NINGBO UNIV

Multi-beam antenna based on one-dimensional microwave planar lens and double-tapered-slot antenna array

The invention provides a multi-beam antenna based on a one-dimensional microwave planar lens and a double-tapered-slot antenna array. The multi-beam antenna is formed by a double-tapered-slot antennaarray (1) and a one-dimensional microwave planar lens (2). The one-dimensional microwave planar lens is formed by four layers of artificial electromagnetic material surfaces (3) where patterns servingas phase shift units (8) are printed, and fixed columns (4). The double-tapered-slot antenna array (1) is formed by double-tapered-slot antenna units (9) and is fixed on an organic glass backboard (7). The antennae are fed by substrate integrated waveguides (6), and can be integrated and connected with other microwave circuits. The one-dimensional microwave planar lens (2) is connected with the organic glass backboard (7) through long nylon support columns (5). The radiation phase center line of the double-tapered-slot antenna array (1) coincides with the focal line of the one-dimensional microwave planar lens (2), and an optimal focusing effect is reached. According to the invention, a high-gain wide-angle spatial scanning function can be achieved, the multi-beam antenna is high in integrated level, simple to manufacture and low in cost.
Owner:SOUTHEAST UNIV

PM2. 5 inversion method and monitoring region segmentation method

The invention discloses a monitoring region segmentation method for PM2. 5 inversion and a PM2. 5 inversion method. The monitoring region segmentation method comprises the following steps: with geographic static indexes and PM2. 5 measured concentration in a monitoring region being as samples, summarizing a correlation coefficient of each static index and the PM2. 5 measured concentration; with the correlation coefficient being as weight, carrying out index normalization on each static index to obtain a normalized parameter N_index, wherein the normalized parameter N_index is displayed in theform of raster data; and carrying out multi-scale segmentation on the raster data of the normalized parameter N_index, and determining an optimal segmentation scheme and dividing the monitoring regioninto a plurality of subregions according to the optimal segmentation scheme. The monitoring region is divided through the multi-scale segmentation algorithm, thereby reducing interference of spatialheterogeneity on parameter estimation; and for each of different research subregions, a specific particle concentration inversion model is established.
Owner:天津珞雍空间信息研究院有限公司

Sensor network coverage enhancement method based on direction angle decomposition optimization and redundant node removal

The invention discloses a sensor network coverage enhancement method based on direction angle decomposition optimization and redundant node removal, and belongs to the field of sensor monitoring. Themethod comprises the following steps: firstly, establishing a three-dimensional cone directed sensing model; decomposing the sensing range of the sensor node into a pitch angle and a deviation angle,and proposing a deviation angle optimization method based on a differential evolution algorithm; and finally, aiming at the problem that a large number of redundant nodes exist in the sensor network,a redundant node removing method is provided. The method can effectively improve the coverage rate of the sensor network and the number of nodes.
Owner:YANGTZE UNIVERSITY

Load identification and multi-sensor fusion sensing method and device

The invention discloses a load identification and multi-sensor fusion sensing method and device, and belongs to the technical field of power monitoring, and the method comprises a power monitoring unit which is used for installing one or more intelligent sensors on an existing power grid to carry out the monitoring and collection of current and voltage; information processing: processing the acquired information by using algorithms of different theories; in the sensing fusion process, complete information about electric power is obtained by using a plurality of sensors, and the survival ability of an electric power system is enhanced in the aspects of detection, tracking and electric power identification by using a multi-sensor data fusion technology. Through reasonable control and use of multiple sensors and observation information thereof, redundant or complementary information of the multiple sensors in space or time is combined according to a certain criterion so as to obtain consistent explanation or description of a tested object, data is processed based on NILM, decomposition and analysis of a power grid can be realized, and the reliability of the power grid is improved. And the limitation when load identification is carried out by using the load steady state characteristic information can be overcome to a certain extent.
Owner:AEROSPACE SCI & IND SHENZHEN GROUP +1

Electronic device

The invention provides an electronic device. The electronic device comprises an antenna module and a wave-transparent diffraction structure. The antenna module is used for transmitting and receiving electromagnetic wave signals of a preset frequency band in a first direction range. The wave-transparent diffraction structure and the antenna module are arranged at an interval; the electromagnetic wave signals of the preset frequency band are within a first direction range. The first direction range is different from the second direction range, and is used for diffracting the electromagnetic wavesignal incident to the preset frequency band of the wave-transparent diffraction structure, so that the antenna module also receives and transmits the electromagnetic wave signal of the preset frequency band in the second direction range, the first direction range being different from the second direction range. The space coverage of the electromagnetic wave signals of the preset frequency band in the electronic equipment is large, and the communication performance is good.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Antenna device and electronic equipment

The invention discloses an antenna device and electronic equipment, and belongs to the technical field of antennas. The antenna device comprises at least one layer of dielectric substrate, a groundingmetal layer, a radiation patch, a first feed structure, a first deflection patch and a radio frequency chip, the grounding metal layer, the at least one layer of dielectric substrate and the radiation patch are stacked. The first feed structure penetrates through the at least one layer of dielectric substrate, a first end of the first feed structure is connected with the radiation patch, a secondend of the first feed structure penetrates through the grounding metal layer and is electrically connected with the radio frequency chip, and a first excitation signal fed by the radio frequency chipis used for exciting a radiation beam of the radiation patch; the first deflection patch is fixed to the first side of the radiation patch. When the radiation patch radiates the wave beam, the deflection of the wave beam radiation direction is realized through different forms (crystalline state and amorphous state) of the first deflection patch, the adjustment of the wave beam radiation directionis realized, and the space coverage of the antenna device is improved.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Fine-modal aerosol parameter inversion method

The invention discloses a fine-modal aerosol parameter inversion method. The characteristic that polarization surface reflectance basically does not change along with wave bands from visible light tonear-infrared wave bands is utilized. The characteristic of small change of polarization surface reflectance is combined. Polarization remote sensing data of the POLDER sensor is inversed to obtain the optical thickness of the fine-modal aerosol. According to the invention, fine-modal aerosol parameters and polarization surface reflectance can be effectively and simultaneously inverted, and the inverted fine-modal aerosol optical thickness has higher spatial coverage, higher spatial resolution and higher precision. The method can be used for researching small-scale fine-modal aerosol, and thecoverage degree and the precision of bright earth surfaces (cities, deserts and the like) are improved.
Owner:INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI

Local path planning method and device, robot and storage medium

The invention discloses a local path planning method and device, a robot and a storage medium. The method comprises the following steps: segmenting prediction duration of predicting local paths of a robot by using a dynamic window method into at least two sub-segments, generating at least two new paths by using the dynamic window method in each sub-segment by using an end point of each path in the previous sub-segment as a starting point, and evaluating a plurality of local paths formed by combining the paths of the sub-segments, and selecting the local path with the highest score from the plurality of local paths as a target path. According to the method, at least two new paths are generated by using the dynamic window method in each sub-segment by taking the end point of each path in the previous sub-segment as the starting point, the number of the paths in each sub-segment is multiplied relative to the number of the paths in the previous sub-segment, the total number of local paths in the prediction duration is increased, and the prediction accuracy is improved. The space coverage rate of the tail end of the path is increased, so that the optimal path which most conforms to the actual environment can be selected, the obstacle avoidance performance of the robot is improved, and the operation safety of the robot is improved.
Owner:GUANGZHOU SAITE INTELLIGENCE TECH CO LTD

Deflection-equipped ct system with non-rectangular detector cells

A CT system is constructed to have diagonally oriented perimeter walls of its detector cells. A CT detector comprised of such detector cells has improved spatial coverage (spatial density) and is better equipped for operation with focal spot deflecting x-ray sources. The number of detector channels is also not increased despite the increase in spatial coverage. Moreover, the detector cells can be constructed without much variance from conventional fabrication techniques.
Owner:GENERAL ELECTRIC CO

Traffic state monitoring method and computer program product

The embodiment of the invention provides a traffic state monitoring method and a computer program product. In the embodiment of the invention, static attribute data of a monitoring area and dynamic attribute data of the monitoring area within monitoring time can be acquired; performing track identification on the dynamic attribute data to determine a navigation track attribute corresponding to the monitoring area; then, traffic state parameters of road nodes in the monitoring area within the monitoring time can be calculated according to the static attribute data and the navigation track attributes; and the traffic state of the road node in the monitoring time can be determined according to the traffic state parameter of the road node in the monitoring time. In the embodiment of the invention, traffic state monitoring of all road nodes in the monitoring area can be realized based on the static attribute data of the monitoring area and the mining result of the navigation trajectory attribute in the monitoring area, and improvement of the space coverage of traffic state monitoring is facilitated.
Owner:ALIBABA SINGAPORE HLDG PTE LTD

Ct detector with non-rectangular cells

A CT detector cell is constructed to have diagonally oriented perimeter walls. With such a construction, the resulting CT detector comprised of such detector cells has improved spatial coverage (spatial density). The number of detector channels is also not increased despite the increase in spatial coverage. Moreover, the detector cells can be constructed without much variance from conventional fabrication techniques.
Owner:GENERAL ELECTRIC CO

Optimization processing method for brightness temperature data of two-dimensional synthetic aperture microwave radiometer

ActiveCN111811660AGood for quantitative accuracy evaluationAccurate curveRadiation pyrometryMoisture content investigation using microwavesBrightness temperatureComputational physics
The invention discloses an optimization processing method for brightness temperature data of a two-dimensional synthetic aperture microwave radiometer, wherein the method comprises the following steps: step 1, respectively obtaining H polarization brightness temperature data and V polarization brightness temperature data of an SMOS according to the brightness temperature data of the SMOS; meanwhile, obtaining SMAP brightness temperature data matched with the SMOS in time and space according to the SMAP brightness temperature data; and step 2, carrying out first nonlinear fitting and second nonlinear fitting according to the brightness temperature data obtained in the step 1, and then completing optimization processing according to translation transformation; or, carrying out the first nonlinear fitting according to the brightness temperature data obtained in the step 1, and completing the optimization processing according to the fixed-point regression fitting. According to the invention, the optimized multi-angle brightness temperature can be obtained, information waste is not caused, and high consistency with the brightness temperature of the SMAP can be maintained. According to the method, the loss of the optimized brightness temperature is less, and the space coverage degree of the SMOS data is greatly improved.
Owner:AEROSPACE INFORMATION RES INST CAS

Heuristic algorithm for credit assessment feature selection

The invention provides a heuristic algorithm for credit assessment feature selection, and the algorithm generates a random spider population based on an SSA algorithm, calculates an opposite solution of the spider population by employing an OBL strategy, selects an optimal solution to form the number of OBL populations, carries out the algorithm iteration of the randomly generated spider population and the OBL spider population, calculates the fitness value and vibration value of a spider individual, selects an optimal solution individual by using a local search algorithm LSA, enables unselected individuals to enter a next round of iteration, and outputs all optimal solutions selected by the LSA after the iteration is finished to form an optimal solution set. According to the invention, the algorithm in the invention is learned through a machine instead of traditional artificial feature screening, so that the efficiency of feature screening is improved; compared with a general heuristic algorithm, an OBL strategy is added into the algorithm, so that the space coverage rate and the stability of the algorithm are remarkably improved; according to the algorithm, an LSA algorithm architecture suitable for the P2P field is introduced, and the feature screening accuracy and the model matching degree are improved.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1

X-ray detection system with improved spatial coverage

An X-ray detection system is described having a solid-state detector module including a plurality of detector tiles at a first side thereof for directly detecting X-ray radiation. The detector module has a plurality of interstitial areas separating adjacent tiles of the detector module, and at least one actuator for inducing motion of the detector module to a plurality of detection positions along a trajectory with respect to a stationary reference frame while the detector module is operated in an exposure mode. The spatial extent of the trajectory in the stationary reference frame is at least as large as the largest interstitial area, and the detector module is adapted for acquiring a plurality of frames in the exposure mode at a frame acquisition rate at least a factor of 100 faster than the inverse of a predetermined exposure time for the exposure mode.
Owner:UNIV GENT

Variable-configuration dual-state long-range marine unmanned vehicle driven by natural environment fluid

The invention discloses a variable-configuration dual-navigation long-range marine unmanned vehicle driven by a natural environment fluid, which has a surface navigation mode, a navigation switching mode and an underwater navigation mode, and includes: a wind energy collection unit that receives wind applied by ocean wind. The aerodynamic force drives the aircraft to sail; the buoyancy adjustment unit adjusts the buoyancy of the aircraft itself in the underwater navigation mode, and combines the hydrodynamic force exerted by the head-on water flow when the aircraft moves to realize the heave movement and horizontal travel of the aircraft; wing keel; linkage The unit is used to complete the pose change of the sail and the wing keel during the navigation switching mode; the photovoltaic power generation unit is used to collect solar energy and provide power supply for the aircraft's power consumption devices during the surface navigation mode. The variable-configuration dual-navigation state long-range marine unmanned vehicle driven by the natural environment fluid provided by the present invention utilizes the sea surface wind and air flow, underwater water flow and sunlight in the natural environment to achieve energy self-sufficiency. It is capable of long-distance navigation in all navigation states.
Owner:TIANJIN UNIV

Multi-beam antenna based on one-dimensional microwave planar lens and double tapered slot antenna array

The invention provides a multi-beam antenna based on a one-dimensional microwave planar lens and a double-tapered-slot antenna array. The multi-beam antenna is formed by a double-tapered-slot antennaarray (1) and a one-dimensional microwave planar lens (2). The one-dimensional microwave planar lens is formed by four layers of artificial electromagnetic material surfaces (3) where patterns servingas phase shift units (8) are printed, and fixed columns (4). The double-tapered-slot antenna array (1) is formed by double-tapered-slot antenna units (9) and is fixed on an organic glass backboard (7). The antennae are fed by substrate integrated waveguides (6), and can be integrated and connected with other microwave circuits. The one-dimensional microwave planar lens (2) is connected with the organic glass backboard (7) through long nylon support columns (5). The radiation phase center line of the double-tapered-slot antenna array (1) coincides with the focal line of the one-dimensional microwave planar lens (2), and an optimal focusing effect is reached. According to the invention, a high-gain wide-angle spatial scanning function can be achieved, the multi-beam antenna is high in integrated level, simple to manufacture and low in cost.
Owner:SOUTHEAST UNIV
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