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79results about How to "Improve noise" patented technology

A four-dimensional 4nqam constellation shaping method and system

The application discloses a four-dimensional 4nQAM constellation shaping method and system, and belongs to the technical field of constellation shaping. The method comprises the following steps: taking a coordinate origin as a square center, according to a preset constellation point priority, expanding a to-be-shaped constellation point in a concentric square from an inner layer to an outer layer in progression to obtain a two-dimensional geometric shaping constellation; mapping the two two-dimensional geometric shaping constellations to a four-dimensional space in a quadrature manner to generate a four-dimensional geometric shaping constellation; initializing and layering the four-dimensional geometric shaping constellation to obtain independent bit streams of layers of the constellation; inputting the independent bit streams into a distribution matcher of a corresponding layer to perform probability distribution matching, and obtaining a constellation symbol index sequence of the layer; layering and mapping the constellation symbol index sequence according to different Hamming weights, and performing quadrant fusion with the four-dimensional geometric shaping constellation to obtain a four-dimensional probability shaping constellation. The application not only realizes flexible construction of a 4n-order constellation, but also can adaptively adjust a constellation structure according to different application requirements.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

LVDS (Low Voltage Differential Signaling) receiving circuit with wide common-mode input range

The invention discloses an LVDS (Low Voltage Differential Signaling) receiving circuit with a wide common-mode input range. The LVDS receiving circuit comprises a common-mode conversion circuit, a main comparator circuit, a secondary comparison circuit and a logical judgment circuit, the common-mode conversion circuit is used for converting an external wide common-mode input differential signal into a signal with constant common-mode voltage and no attenuation of the differential signal; the main comparator circuit identifies the converted differential signal to complete differential-to-single-ended data conversion; the secondary comparator circuit is composed of two low-speed comparators; and the logic judgment circuit judges the output of the main comparator and the window comparator to ensure that the output of the input end of the circuit group is a constant level under the short circuit and disconnection conditions, so that the function of dynamic failure protection of the circuit is realized. The wide common-mode input circuit can realize discrimination of wide common-mode input signals ranging from-4V to 5V, and has a dynamic failure protection function.
Owner:BEIJING MICROELECTRONICS TECH INST

A method and device for identifying and dynamically blocking illegal access of a Bluetooth device

ActiveCN121751176BAchieve multi-dimensional perceptionBreaking through the limitations of insufficient discrimination of subtle defectsBiological modelsSecurity arrangementAlgorithmRadio frequency
The application discloses a kind of illegal access hardware identification and dynamic blocking method and device of bluetooth device, it is related to artificial intelligence technical field, the method includes the steady-state current response waveform and radio frequency IQ baseband signal of synchronous acquisition bluetooth device;Signal is preprocessed and respectively extracts cyclic stationary feature and joint time-frequency-cyclic feature;Adaptive multi-source feature fusion network of fusion channel and spatial attention is constructed, and classification is carried out in combination with double-branch convolution, protocol perception feature modulator and multi-scale hollow convolution pyramid.The application realizes multidimensional perception and cross-domain feature fusion of hardware fingerprint, enhances abnormal discrimination by protocol perception modulation, realizes the feature normalization of different working modes of same hardware and illegal equipment feature abnormal amplification, forms end-to-end active defense system from feature extraction to dynamic blocking.
Owner:深圳市乾海芯联科技有限公司 +1

Axial flow fan, air conditioner outdoor unit and air conditioner

The present disclosure relates to an axial flow fan blade, a fan assembly, an air conditioner outdoor unit and an air conditioner. The axial flow fan blade comprises a hub and a plurality of blades arranged on the outer side of the hub, each blade comprising a pressure surface and a suction surface arranged oppositely, each blade comprising a blade inner edge and a blade outer edge arranged oppositely, and each blade further comprising a blade leading edge and a blade trailing edge arranged oppositely. Each blade is divided into a first region, a second region and a third region in a circumferential direction. The first included angle of the first region, the second included angle of the second region and the third included angle of the third region are selected to be in a ratio of 1:1.25-1.9:1.25-1.9.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI

Acceleration sensor and method of manufacturing the same

The application discloses an acceleration sensor and a manufacturing method thereof. The acceleration sensor comprises a first capacitor, a second capacitor, a third capacitor and a fourth capacitor on a substrate. The first capacitor comprises a second detection mass and a first detection electrode. The second capacitor comprises a first detection mass and a first detection electrode. The third capacitor comprises a second detection mass and a second detection electrode. The fourth capacitor comprises a first detection mass and a second detection electrode. The first detection electrode and the second detection electrode are located between the first detection mass and the second detection mass and are independent of each other and located in the same plane. The application forms a full-bridge capacitor detection structure by the first detection mass, the second detection mass, the first detection electrode and the second detection electrode located between the first detection mass and the second detection mass, which can effectively reduce parasitic capacitance, optimize noise, improve stability and sensitivity.
Owner:HANGZHOU SILAN MICROELECTRONICS CO LTD

A noise reduction stator, motor and compressor

The utility model relates to the technical field of stator, concretely relates to a kind of noise reduction stator, motor and compressor;Wherein, noise reduction stator, including annular yoke and the alternate arrangement of continuation part and abutting portion on the outer periphery of annular yoke, abutting portion abuts to the inner side wall of shell;Continuation part is formed along the radial recess in the direction of departing from shell, and the corresponding central angle of continuation part is SA1;With the lowest point of continuation part recessing, the annular P formed by surrounding is reference, the distance of abutting portion to annular P is T1;Continuation part includes the first arc segment and second arc segment of connection, and the radius of first arc segment is RR1;The radius of second arc segment is RR2;The utility model limits the relationship between the corresponding central angle of continuation part in noise reduction nail, the distance of abutting portion to the lowest point of continuation part and the specific size between continuation part structure, to make noise reduction stator produce good effect in reducing electromagnetic noise.
Owner:TCL RUIZHI (HUIZHOU) REFRIGERATION EQUIP CO LTD

A linkage structure cavity that can enhance the SPL of musical glass

ActiveCN117014749BIncrease SPL valueSPL improvementsMicrowave cavityEngineering
This invention discloses a linked structure cavity for improving the SPL (Surface Placement) of musical glass, comprising an active device, a microwave cavity, a linked nano-cushion, and a metasurface crystal layer. The active device is disposed on the original glass, and a metasurface crystal layer is horizontally disposed on its end face away from the original glass. A ring-shaped microwave cavity is disposed between the metasurface crystal layer and the original glass, relative to the outside of the active device. The microwave cavity is spaced around the active device and forms a circular region with the metasurface crystal layer and the original glass. A linked nano-cushion is disposed between the metasurface crystal layer and the active device, and the linked nano-cushion and the microwave cavity are configured to not interfere with each other. This multi-dimensional combination of the linked nano-cushion, the microwave cavity, and the metasurface crystal layer forms a strong coupled planar sound field, improving the SPL value of the musical glass. This invention improves the SPL value of musical glass through the multi-dimensional combination of the microwave cavity, the linked nano-cushion, and the metasurface crystal layer.
Owner:JIANGSU IRON ANCHOR GLASS LTD BY SHARE LTD

A method for measuring mode purity of a few-mode ring-core fiber based on principal component prior information

The application discloses a mode purity measurement method of a few-mode ring core fiber based on principal component prior information. First, all spatial modes supported by the few-mode ring core fiber to be measured are calculated to determine the highest order; second, a nonlinear equation set connecting the fiber output intensity mode spot and the complex amplitude of each spatial mode is listed, and an algorithm for solving the equation set by using the principal component order prior information is designed, so that the recovery of the complex amplitude of each mode and the measurement of the principal component mode purity are realized. Then, an optical device for detecting the fiber exit mode field is built. For the fiber near-field intensity mode spot at any time, the prior information of the principal component order is obtained through an interference pattern or the shape of the intensity mode spot, and the measurement of the mode purity can be realized by applying the above-mentioned algorithm. The application can accurately recover the mode purity of the few-mode ring core fiber from the fiber output near-field intensity mode spot only, and has strong applicability.
Owner:NANKAI UNIV

Luftreifen

InactiveAT1890433Treduce road noiseImprove steering stability
To achieve reduced road noise and improved steering stability, an embodiment of the present invention provides a pneumatic tire in which a carcass ply has a thickness of from 0.50 mm to 2.00 mm, a carcass coating rubber contains: natural rubber and a styrene-butadiene copolymer rubber as diene rubbers; and carbon black having N2SA of from 35 to 140 m2 / g, a hardness (Hs cap) of a cap tread rubber and a storage modulus (E'carcass) of the carcass coating rubber satisfy 5 ≤ (Hs cap) / (E'carcass) ≤ 15.
Owner:THE YOKOHAMA RUBBER CO LTD

compressor

The compressor (10) includes a compression mechanism (20) and a muffler structure (M) arranged on a blow-off flow path (38) that communicates a compression chamber outlet (26) of the compression mechanism (20) with an inflow end of a blow-off pipe (8), the muffler structure (M) being a first muffler portion (S1) and a second muffler portion (S2) that are connected in series so as to repeatedly expand and contract the refrigerant gas.
Owner:DAIKIN INDUSTRIES LTD

Driving system for high-pressure hose roller

ActiveCN224185634UAvoid stuck phenomenonavoid large gapsGear wheelElectric machinery
The utility model discloses a driving system for a high-pressure hose roller, which comprises a vertically arranged driving motor, a speed reducer connected to the driving motor, a pinion connected to a horizontal output shaft of the speed reducer and a large gear ring meshed with the pinion, teeth are arranged on the inner ring of the large gear ring, and the periphery of the large gear ring is fixedly connected with the roller. A high-pressure hose is wound on the roller, an eccentric disc is further arranged on the speed reducer, the inner circle of the eccentric disc is connected to the speed reducer through a plurality of mounting holes in the periphery, and the outer circle of the eccentric disc is connected to the roller base through a plurality of mounting holes in the periphery. The center of the inner circle rotates around the center of the outer circle, so that the center distance between the small gear and the large gear ring is adjusted to be within a designed range to achieve normal meshing. By arranging the eccentric disc, the center distance of the gear set can be adjusted, the assembly precision is improved, the meshing smoothness of the gear set is ensured, and the service life of equipment is prolonged.
Owner:SINOPEC OILFIELD EQUIP CORP +1

Pressure reducing valve and fuel cell vehicle

This application belongs to the field of valve technology, specifically relating to a pressure reducing valve and a fuel cell vehicle. The pressure reducing valve includes an inlet connector and a gas outlet; a primary pressure reducing assembly includes a primary pressure reducing valve body and a primary pressure reducing component, the primary pressure reducing component being inserted into the primary pressure reducing valve body. The primary pressure reducing component includes a primary pressure reducing section, with the gas outlet portion of the inlet connector inserted into the primary pressure reducing valve body, and the primary pressure reducing section and the gas outlet being positioned opposite each other. In a first direction, the cross-sectional area of ​​the primary pressure reducing section gradually decreases in a second direction, and the first direction intersects the second direction. This solution, through the primary pressure reducing section, can reduce the noise generated during gas pressure reduction, improving the vehicle's noise, vibration, and acoustic roughness characteristics.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD

Euro 7 emission standard-oriented enhanced ferrite nitrocarburizing oxidation treatment method for brake disc

PendingCN121976015AImprove rust resistanceUniform coatingFurnace typesSolid state diffusion coatingEmission standardFerritic nitrocarburizing
The invention provides a method for treating a brake disc through enhanced ferrite nitrocarburizing oxidation and the brake disc manufactured through the method. The brake disc is subjected to stress relief annealing, multi-stage pre-oxidation treatment, multi-stage nitriding treatment, multi-stage post-oxidation treatment and cooling treatment; and key parameters such as process temperature, atmosphere concentration and treatment duration of each stage are regulated and controlled. According to the brake disc manufactured through the treatment, the abrasion resistance is remarkably improved, the rust resistance and the corrosion resistance are enhanced, and the thickness of the white bright layer is uniform and consistent. The brake disc treated by adopting the method disclosed by the invention smoothly passes a braking particulate matter emission test of the Europe 7 standard, and the dual advantages of the brake disc in the aspects of environmental protection performance and braking performance are proved.
Owner:CHONGQING SANYOU FUTURE AUTOMOTIVE TECHNICAL SERVICE CO LTD

A slotless ac motor structure based on a few iron cores

This utility model discloses a slotless AC motor structure based on a reduced-core design, comprising a housing, a stator module, a partial core module, and a rotor module. The housing includes a main body and a base plate. The stator module is built into the housing and includes an annular non-magnetic frame and coils. The partial core module includes several cores, which are mounted one-to-one on a core mounting bracket, with air gaps between adjacent cores. This slotless AC motor structure aims to solve problems such as significant cogging effect, excessive core weight, and inflexible magnetic circuit in traditional motor structures. The motor eliminates the traditional slotted stator structure, adopting a combination design of slotless coils and a partial magnetic core. While ensuring effective control of the magnetic flux path, it significantly reduces motor weight, manufacturing complexity, and improves dynamic response performance.
Owner:JIAXING LOUIS NAIR MOTOR CO LTD

Hospital infection prevention and protection measure evaluation method and system based on cost-benefit analysis

PendingCN122511517ASolve the problem of breakpoint recognition lagImprove timelinessAdaptive identificationBenefit analysis
The application discloses a medical institution hospital infection protection measure evaluation method and system based on cost-benefit analysis, relates to the technical field of data processing, and comprises the following steps: collecting medical insurance policy release information and disease control early warning information; the application realizes adaptive identification and segmented modeling of continuous multi-breakpoint impact scenarios by constructing multiple homogeneous period models and organizing the models into a model library in time sequence, solves the problem that a single-breakpoint detection algorithm in the prior art cannot handle multi-breakpoint continuous impact and subsequent impact is forcibly classified into a segmented fragment, leading to model parameter mismatch, and guarantees the parameter accuracy of the evaluation model under different environmental stages; the discriminator outputs a probability value based on anchor data, and the output results of the previous homogeneous period model and the subsequent homogeneous period model are weighted and fused based on the probability value, smooth transition of the evaluation output in the junction window period is realized, and the continuity and reliability of the decision basis in the junction window period are ensured.
Owner:南京吾爱网络技术有限公司

Electric drive system with hydraulic torque converter and forklift

PendingCN121993594ALift climbImprove starting performanceLifting devicesFluid gearingsReduction driveDrive motor
The invention relates to the technical field of electric driving systems, and discloses an electric driving system with a hydraulic torque converter and a forklift. The system comprises a driving motor, a hydraulic torque converter, a speed reducer and a vehicle control unit, wherein a lock-up clutch is integrated in the hydraulic torque converter; an output shaft of the driving motor is connected with a pump wheel input side of the hydraulic torque converter; a turbine output side of the hydraulic torque converter is connected with an input shaft of the speed reducer; the output end of the reducer is connected with a vehicle drive axle; when the vehicle is in the low-speed large-torque demand working condition, the lock-up clutch is controlled to be separated, so that the hydraulic torque converter works in the torque conversion working condition, and when the vehicle is in the low-speed large-torque demand working condition, the lock-up clutch is controlled to be separated; and when the vehicle is in a high-speed small-torque demand working condition, the lock-up clutch is controlled to be engaged, so that the pump wheel of the hydraulic torque converter is mechanically locked with the turbine, and the vehicle is in a coupler working condition. The power performance and the energy efficiency of the vehicle are improved, the cost of the electric drive system is reduced, and the economical efficiency and the NVH performance are improved.
Owner:ANHUI HELI CO LTD

Linkage for automatic film wrapping machine

The application is a linkage device of automatic film packaging machine, which comprises a mounting base, a weighing mechanism, a lifting mechanism, a lifting and lowering mechanism and a feeding mechanism; the weighing mechanism comprises a weighing platform; the lifting mechanism comprises a lifting driver, a setting frame and a lifting bracket capable of being driven by the lifting driver to lift and lower relative to the setting frame and lift the material from the weighing platform; the lifting and lowering mechanism comprises a lifting and lowering driver and a lifting and lowering seat; the feeding mechanism comprises a feeding driver, a transverse shaft and a feeding frame capable of receiving the material from the lifting bracket and conveying to the lifting and lowering seat along the transverse shaft; the weighing mechanism, the setting frame of the lifting mechanism, the lifting and lowering mechanism and the transverse shaft of the feeding mechanism are fixed on the mounting base at intervals, and the weighing platform, the lifting bracket and the bearing of the feeding frame are matched with each other; each mechanism can be installed independently without affecting each other, and the driver of each mechanism does not need to bear the load of other mechanisms, thereby reducing the load of single driver.
Owner:KW TW MASCH GMBH

New energy vehicle motor with shock absorption function

ActiveCN224610627Uimprove noisereduce tension
The utility model discloses a new energy automobile motor with shock attenuation function, including motor main part, the outer end cover of motor main part is equipped with damping assembly, the damping assembly includes damping shell, the inner wall of damping shell is circumferentially embedded with a plurality of shock attenuation sheet, and the one end of shock attenuation sheet extends outward and forms the resistance surface that projects the inner wall of damping shell. The utility model discloses a plurality of outward convex shock attenuation sheets are designed on the inner wall of damping shell, and the shock attenuation sheet will be contacted with motor first, and the shock attenuation sheet swings with the amplitude of motor main part when motor main part operates, and the shock attenuation sheet is isolated from the collision, simultaneously, utilizes the characteristics that TPU material has high tension, high pulling force, strong toughness and high resilience, so that it can play the role of buffering when being pressed, can effectively improve the noise produced by the vibration of motor main part under the operating condition, and secondly, after assembling, the heat dissipation gap is still formed between motor main part and damping shell, so that the damping effect is guaranteed, and the overall heat dissipation effect is also guaranteed.
Owner:KAIFENG MING GENERATOR MANUFACTURING CO LTD

Text sensitive word library extraction method, device and equipment based on neural network model

The application relates to a text sensitive word library extraction method, device and equipment based on a neural network model. The method comprises the following steps: constructing a sensitive word library extraction model; the sensitive word library extraction model comprises a self-defined rule algorithm, a character-by-character segmentation algorithm, a Chinese word segmentation algorithm and an N-gram algorithm; the sensitive word library extraction model is pre-trained according to a training data set; the pre-trained sensitive word library extraction model is used for word segmentation extraction and word library quantitative analysis on the text to be extracted; the full-amount word library is subjected to field structure design; the pre-trained sensitive word library extraction model is iteratively trained according to the designed word library; after the sensitive word extraction is carried out by using the trained sensitive word library extraction model, data analysis is carried out according to a word segmentation frequency filtering rule, a word segmentation character quantity filtering rule and a word segmentation type filtering rule, and a sensitive word library is obtained. The method can improve the sensitive word extraction accuracy and efficiency.
Owner:HUNAN INKE INTERACTIVE ENTERTAINMENT NETWORK INFORMATION CO

Current-type Hall effect acquisition circuit

This application provides a current-type Hall effect sensor circuit, belonging to the technical field of Hall effect sensor circuits. Addressing the problem of poor output signal stability in Hall effect sensor circuits, this application provides a current-type Hall effect sensor circuit, including: an operational amplifier, a voltage divider unit, a feedback unit, a first RC low-pass filter unit, and a second RC low-pass filter unit; the first RC low-pass filter unit is connected between the non-inverting input terminal of the operational amplifier and an external driving module, which outputs a Hall signal during driving; a voltage divider unit is connected between the inverting input terminal of the operational amplifier and the power supply voltage terminal, and a feedback unit is connected between the output terminal of the operational amplifier and its inverting input terminal, forming a feedback loop, with the power supply voltage terminal providing the power supply voltage signal; the second RC low-pass filter unit is connected between the output terminal of the operational amplifier and an external processing module. This application has strong adaptability and high output signal stability.
Owner:SHANGHAI JINGCHUANG ZHIXIN AUTOMOBILE TECHNOLOGY CO LTD

A sound-absorbing and noise-reducing structure for a vacuum cleaner

ActiveCN224269187UImprove acoustic performanceimprove noiseSuction cleanersLow noiseElectric machinery
This utility model discloses a sound absorption and noise reduction structure for a vacuum cleaner, including an airflow channel pipe. One end of the airflow channel pipe is snapped into a vacuum cleaner connector. Dust chamber shell one and dust chamber shell two are respectively attached to both sides of the airflow channel pipe. The mating surfaces of dust chamber shell one and dust chamber shell two are snapped into each other, and a handle ring is snapped into the outer side of the dust chamber shell one near the vacuum cleaner connector end, and a limit ring is snapped into the outer side of the dust chamber shell one away from the handle ring end. A dust chamber shell cover is snapped into the top of dust chamber shell one and dust chamber shell two. Heat dissipation holes are opened on the bottom side of each dust chamber shell one and dust chamber shell two, and a motor assembly is fixedly connected inside the corresponding heat dissipation holes. Through the integrated design of airflow channel optimization, vibration isolation, composite noise reduction and efficient heat dissipation, the acoustic performance of the vacuum cleaner is improved while ensuring heat dissipation efficiency and structural reliability, achieving a comprehensive technical effect of low noise and high stability.
Owner:SUZHOU JIEYOU ELECTRICAL TECHNOLOGY CO LTD

Pipe network pressure-superposed cooperation and parallel connection high-level regulation and storage bag type air pressure water tank pressurization water supply system

ActiveCN224119636Ureduce shockAvoid frequent starts and stopsService pipe systemsWater mainsWater useWater flow
The utility model discloses a pipe network pressure-superposed matching and parallel connection high-level regulation and storage bag type air pressure water tank pressurization water supply system. The system comprises a municipal pipe network, a flow stabilization tank, a variable frequency pump set, a water supplementing main pipe, more than two bag type air pressure water tanks, a pressurization water supply main pipe and a user pipe network, a bag type air pressure water tank comprises a water supplementing branch pipe, a pressurizing water supply branch pipe, a water drainage pipe, an air supplementing opening and a security check device. A lower limit pressure switch, an upper limit pressure switch and an ultraviolet lamp are sequentially arranged on the rear section of the pressurizing water supply main pipe in the water flow direction. According to the utility model, a plurality of high bag type air pressure water tanks are used for regulating, storing and supplying water to a user pipe network, so that the impact on a municipal water supply pipe network in a water peak period is reduced; pressurized water supply is performed on a user pipe network by adopting an air pressure extrusion and gravity self-flowing form in the air pressure water tank, so that the requirement of multiple user pipe networks on pressurized water supply is met; the water replenishing operation of the variable-frequency pump set is controlled by the double-pressure switch, the linkage control logic is simple, and frequent starting and stopping of the variable-frequency pump set are avoided.
Owner:TIANJIN ANBANG TECH CO LTD

Household garbage throwing behavior early warning method and system based on computer vision

PendingCN121963314AEffective regulations on advertising behaviorachieve recognizabilityCharacter and pattern recognitionAlarmsFeature parameterVisual perception
The invention provides a household garbage throwing behavior early warning method and system based on computer vision, and relates to the technical field of computer vision garbage throwing early warning, and the method comprises the steps: deploying a vision capturing device, delimiting a recovery equipment body, normal garbage throwing and peripheral throwing monitoring areas, and configuring dynamic video analysis parameters. Outputting a standardized visual monitoring system; capturing a putting behavior video stream through a standardized visual monitoring system, executing personnel target detection, motion trail tracking, garbage object feature recognition, putting behavior mode analysis and putting result validity evaluation, and outputting putting behavior analysis data; constructing a putting behavior grading system, calculating putting behavior characteristic parameters, carrying out behavior grading, and matching early warning instruction parameters; and an early warning instruction is generated according to the early warning instruction parameter, so that real-time monitoring, intelligent identification and graded early warning of garbage throwing behaviors are realized, the garbage throwing behaviors of the public are effectively standardized, and the urban environmental health management level is improved.
Owner:TONGLING JINSHIDAI TECH CO LTD

Unmanned aerial vehicle spatial pose estimation method and device, electronic equipment and storage medium

The present application belongs to the field of computer vision and intelligent perception technology, and provides a kind of unmanned aerial vehicle space pose estimation method, device, electronic equipment and storage medium, including: performing feature extraction on RGB input tensor and thermal imaging input tensor, to obtain RGB feature vector and thermal feature vector;Perform feature fusion on RGB feature vector and thermal feature vector with learnable modal weight and global attention, to obtain multi-modal fusion feature vector;According to the frequency domain transformation of RGB feature vector, thermal feature vector and multi-modal fusion feature vector, an enhanced spatial feature map is obtained;Training is performed by local fractal descriptor and enhanced spatial feature map;The enhanced spatial feature map, fractal robust embedding vector and multi-modal fusion feature vector are spliced and predicted to obtain the spatial pose estimation result of the unmanned aerial vehicle, and the precision and stability of the unmanned aerial vehicle in complex environment are improved by the above technical solution.
Owner:湖南工商大学

A SAR image classification method and system based on scattering cues and optimal transmission

This invention discloses a SAR image classification method and system based on scattering cues and optimal transmission, belonging to the field of synthetic aperture radar image classification technology. The main steps include: thresholding and connected component analysis of the SAR image to extract the coordinates of the image scattering center; generating scattering cues text and cues vector sequences based on the normalized coordinates of the scattering center, obtaining scattering perception text feature vectors and image feature vectors to achieve cross-modal alignment; introducing uniform edge probability to supplement global category constraints, dynamically separating clean and noisy samples; and optimizing model parameters through joint training to achieve robust SAR image classification. This invention, by introducing prior knowledge of the scattering structure unique to SAR images and combining it with the cross-modal capability of a visual-language model, effectively improves the classification accuracy and robustness under noisy label conditions, making it suitable for complex remote sensing scenarios such as disaster monitoring, military reconnaissance, and marine surveillance.
Owner:JILIN UNIVERSITY

Reliable receiver subset selection method and system under non-line-of-sight condition

The invention discloses a reliable receiver subset selection method and system under a non-line-of-sight condition, belongs to the technical field of time difference of arrival positioning, and solves the problem of false low residual but positioning errors caused by selection of subsets only depending on minimum fitting residual under a non-line-of-sight (NLOS) condition in the prior art. The method comprises the following steps: constructing a candidate receiver subset, and determining a traversal sequence; a balance parameter is introduced to form an extended set, screening is carried out, and a reliable newly-added receiver set is determined; and combining the candidate receiver subset with the reliable newly-added receiver set to obtain a reconstructed receiver set, and performing reference consistency check on the reconstructed receiver set to obtain a final reliable receiver set. The method is suitable for a time difference of arrival positioning scene.
Owner:HARBIN INST OF TECH

Low-vibration roller external step chain and passenger conveyor

ActiveCN116513927BImproved downward hang distanceimprove vibration
The application discloses a low-vibration external roller step chain, which comprises a plurality of rollers and a plurality of damping mechanisms. A roller is fixed at the connection position of every several chain links, and the roller is fixed outside the chain plate and close to the guide rail side of the ladder. A damping mechanism is arranged between every two rollers, and the damping mechanism is fixed on the middle chain link between the two rollers. The middle chain link refers to the chain link close to the middle of the plurality of chain links between the two rollers, and the fixing position of the damping mechanism is on the same side of the roller. When the passenger conveying device operates, the damping mechanism is in contact with and slides along the guide rail of the ladder of the passenger conveying device, and the gravity of the step chain can be supported by the damping mechanism through the guide rail of the ladder. Compared with the prior art, the damping mechanism is added, the downward overhanging distance of the step chain between unit steps is improved, and the damping mechanism also helps to improve the vibration and noise of the step chain during operation.
Owner:SHANGHAI MITSUBISHI ELEVATOR CO LTD

Elastic coupling parameter determination method, elastic coupling optimization method, and electronic device

The application discloses an elastic coupling parameter determination method, an elastic coupling optimization method and electronic equipment. The elastic coupling parameter determination method comprises the following steps: obtaining a target attenuation amount of an elastic coupling applied to a steering column of a vehicle to be tested; obtaining an attenuation amount and static stiffness relationship; and determining a static stiffness corresponding to the target attenuation amount as a target static stiffness of the elastic coupling according to the attenuation amount and static stiffness relationship. The application can efficiently and accurately match the elastic coupling of the steering column, avoid multiple part replacement tests, improve efficiency and save sample part resources. The elastic coupling target static stiffness obtained by the elastic coupling parameter determination method of the application can meet the target attenuation amount, reduce the gear meshing noise of the steering machine itself and the energy transmitted to the steering wheel via the column under the excitation of the road surface, improve the steering wheel vibration and noise, and improve the driving comfort.
Owner:CHERY AUTOMOBILE CO LTD

Six-slot six-pole single-phase motor for axial flow exhaust fan

A six-groove six-pole single-phase motor for an axial flow exhaust fan relates to the technical field of motors, a six-groove iron core is arranged on the inner side of a six-pole magnetic ring, an insulating lower wire frame and an insulating upper wire frame are respectively and fixedly inserted on the front side and the rear side of the six-groove iron core, and the insulating upper wire frame is rotatably sleeved on a motor shaft through a bearing. A graphite gasket sleeves the position, located on the rear side of the insulating upper wire frame, of the motor shaft, the bearing support rotationally sleeves the motor shaft through a bearing, three supporting columns are fixedly arranged on the front side of the insulating lower wire frame, and a circuit board is fixedly arranged on the three supporting columns; a first clamping ring and a second clamping ring are clamped in a front clamping groove and a rear clamping groove formed in a motor shaft respectively, a machine shell abuts against the rear side of a bearing support, and three internal threaded columns are fixedly arranged on the rear side wall of the bearing support, so that the loading performance of the axial flow fan can be improved, vibration and noise of the motor can be improved, and the service life of the motor is prolonged. And meanwhile, the motor can be conveniently disassembled and assembled, and the convenience of motor maintenance is improved.
Owner:INATSU ELECTRIC (ZHUHAI) CO LTD

A power generation and injection locking synthesis system and regulation method

ActiveCN121367496BSelf-bias implementationhigh power signalPulse automatic control
A power generation and injection lock-in combining system and adjustment method are disclosed, belonging to the field of radio frequency and microwave power technology. The power generation and injection lock-in combining system includes an external signal source, N power units, a power combining network, and a dynamic adjustment module. The external signal source is connected to the output terminals of the N power units, providing a unified reference signal and injecting the reference signal into each power unit. The power combining network is connected to the output terminals of the N power units, superimposing the output signals of the N power units into a single signal. One part of this signal is used as a high-power output, and the other part is sent to the dynamic adjustment module through a directional coupler. The dynamic adjustment module performs real-time detection of the output of the power combining network through the directional coupler and the outputs of the N power units through the directional coupler, and adjusts the power and phase of each power unit according to the real-time detected power and phase to ensure that the power and phase of each power unit are consistent.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA