22results about How to "Reduce distortion problems" patented technology

The invention relates to the technical field of optical fiber wireless communication and mobile forward transmission, in particular to a digital analog optical fiber wireless forward transmission transmitting end parameter self-adaptive optimization method and system based on reinforcement learning. Decomposing the normalized wireless signal into digital parts of all levels and a final analog residual error part through multi-level modulation, and transmitting the digital parts and the final analog residual error part in a time division multiplexing manner; a receiving end represents inter-symbol interference caused by link nonlinear distortion and bandwidth limitation, and the signal-to-noise ratio of a recovery signal is calculated based on the error vector amplitude. Parameters of a transmitting end are optimized and modeled into a Markov decision process, states comprise rounding factors, scaling factors, constellation forming factors and pre-equalization filter tap coefficients of all levels, and actions are discrete increments of the parameters; a reinforcement learning agent is constructed by using a dual deep action value network, and training is updated in combination with experience playback and a target network. The reward function comprises a threshold satisfaction item and a signal-to-noise ratio change item; parameters are interactively updated in the training stage, and online self-adaptive adjustment is performed in the reasoning stage.

The application relates to the fields of microelectronic packaging and novel display technology, and discloses a packaging method suitable for a hybrid device packaging structure of a MicroLED, which comprises the following steps: preparing a wide-bandgap semiconductor driving chip, a logic control chip and a light-emitting pixel chip; transferring and fixing the wide-bandgap semiconductor driving chip, the logic control chip and the light-emitting pixel chip on the surface of a carrier plate in a coplanar mode; depositing a dielectric layer on the surface of the carrier plate to expose electrode contacts; manufacturing metal wires to build an internal electrical interconnection structure and lead out a peripheral interface; coating a packaging material on the surface of the carrier plate to insulate and coat the internal electrical interconnection structure; curing and cutting to separate an independent pixel packaging body; and assembling the pixel packaging body to a display panel substrate and connecting the peripheral interface to a global power supply network. The application suppresses the hot carrier effect under high-temperature working conditions, solves the problem of thermal failure, reduces the parasitic capacitance of high-frequency driving interconnection, removes potential failure products before macroscopic mounting, and improves the assembly yield of a display panel array.

The application provides a monolithic adsorbent based on 3D printing technology. The application selects halloysite nanotubes and hydroxypropyl methyl cellulose as binders. The halloysite nanotubes have excellent high-temperature resistance, hardness and durability, and chemical stability, and can meet the application requirements of the catalyst under high-temperature complex working conditions, so that the catalyst structure remains mechanical stability. The hydroxypropyl methyl cellulose has processability and plasticity, and can help to print complex shapes and structures. The super strong bonding force and interlayer adhesion can effectively bond the printing materials, ensure the firmness and stability of the interlayer adhesion in the printing process, and help to reduce the distortion and deformation in the printing process. The monolithic passive NO x adsorbent provided by the application has a simple and feasible preparation method, is a non-noble metal adsorbent with economic benefits, and can be connected in series with a downstream SCR treatment unit to realize ultra-low emission in the NOx cold start stage.

Embodiments of the present application provide a channel training method and program product, the method comprising: in response to a first update instruction and first equalizer state information sent by a first device, receiving end adaptive equalization is carried out on equalization coefficient through a software interface; according to the receiving end adaptive equalization result, the second update instruction and the second equalizer state information are sent to the first device, so that the first device modifies the specified equalization coefficient, receives the third equalizer state information and the third update instruction sent by the first device after updating; in response to the third equalizer state information and the third update instruction, hardware adaptation is carried out on the receiving end equalization coefficient, and the fourth equalizer state information is sent to the first device according to the hardware adaptation result, wherein the fourth equalizer state information is used to indicate that the channel composed of the first device and the second device is trained. The problem that only hardware automatic training is used for channel training in the related art leads to unstable channel training and long time consumption.

This utility model relates to the field of automotive fabric technology, specifically to a 3D-MESH fabric for car audio systems. It includes a bottom cover, a top cover, and a fabric material disposed between the two. The fabric material comprises a MESH layer and a metal mesh fabric, which are bonded together using PA mesh hot melt adhesive. The metal mesh fabric includes memory foam fabric, a metal mesh, and carbon fiber fabric. Both ends of the metal mesh are bonded to the memory foam fabric and the carbon fiber fabric. The metal mesh provides better protection, preventing damage to the internal components of the audio system from external objects. The memory foam fabric improves the fit and stability of the audio system installation, reducing vibration and friction noise caused by vehicle bumps. Finally, the carbon fiber fabric enhances the stability of the audio structure, reduces deformation caused by vibration, helps maintain accurate sound quality, and its good thermal conductivity helps dissipate heat, improving system reliability and lifespan.

Embodiments of the present application provide a kind of board level structure and electronic equipment, it is related to electronic equipment technical field.The board level structure includes substrate, camera module, power supply wiring and suspension coil.Wherein, power supply is equipped on substrate.Cameras module is set to substrate, and cameras module includes magnetic component.At least part of power supply wiring is located at the outside of cameras module.At least part of suspension coil is located between cameras module and power supply wiring, when power supply inputs periodic variation input current to power supply wiring, coupling current with input current frequency same, opposite direction is generated in the suspension coil between cameras module and power supply wiring.The board level structure can reduce the electromagnetic interference that power supply wiring generates to the magnetic component in cameras module by setting suspension coil, and it is convenient to wiring, can solve the problem of higher difficulty in wiring in related art.

Provided is a telecentric lens system. The lens system includes a front group (T1), a middle group (P), a diaphragm (S), and a rear group (T2). The front group (T1), the middle group (P), the diaphragm (S) and the rear group (T2) are sequentially arranged from an object plane side of the telecentric lens system to an image plane side of the telecentric lens system. The front group (T1) has positive focal power, the rear group (T2) has negative focal power, and the diaphragm (S) is located on an image focal plane of the front group (T1). A focal length of the lens is f, a focal length of the front group (T1) is fT1, a focal length of the rear group (T2) is fT2, and fT1 and fT2 separately satisfy the following relationships with f: 0.80 <|fT1 / f|<1.20, and 3.00 <|fT2 / f|<4.00. The present disclosure provides a telecentric lens system, through the organic combination of optical elements such as the front group, the middle group, the diaphragm, and the rear group, can simultaneously have the advantages of high magnification, high resolution, low distortion, and a large aperture. The telecentric lens system is particularly suitable for the precision detection field and is suitable for large-scale promotion and application.

An example package substrate includes a glass core, an upper redistribution layer disposed on an upper portion of the glass core, and a lower redistribution layer disposed on a lower portion of the glass core, the glass core being a plate-shaped glass in which a via hole is disposed, the upper redistribution layer being disposed on the upper portion of the glass core, and the lower redistribution layer being disposed on a lower portion of the glass core. The redistribution layer includes a wiring layer and an insulating layer, the wiring layer is formed by patterning a copper layer having crystal grains, an upper surface is provided on an upper portion of the upper redistribution layer, and an electronic component is mounted on the upper surface. C is an area ratio of crystal grains having a ratio of a long axis to a short axis of 3: 1 or more in the wiring layer disposed in the upper rewiring layer, and D is an area ratio of crystal grains having a ratio of a long axis to a short axis of 3: 1 or more in the wiring layer disposed in the lower rewiring layer. The value obtained by dividing C by D of the package substrate is 0.85 or more and 0.99 or less. An example can provide a package substrate that improves signal integrity by controlling a crystal structure of copper disposed in a wiring layer, etc., and reduces problems such as electromagnetic interference occurring when transmitting a high-frequency signal.

The present application relates to a kind of based on compression self-encoding unsupervised low-illumination image enhancement method, comprising the following steps: initialization generator and the network parameter of discriminator;Generator obtains low-illumination image, extracts noise vector, generates first false image;Discriminator judges first false image is real data image or false data image;Generator adjusts the generation strategy of generator, obtains first new strategy;Generator obtains first false image generated by itself, generates second false image again;Discriminator judges second false image is real data image or false data image, and discriminator outputs second judgment result;Generator obtains second judgment result, adjusts the generation strategy of generator, obtains second new strategy.The training efficiency and generalization ability of generative adversarial network are improved by using compression self-encoding, reduce image distortion and noise, so as to improve the effect of unsupervised low-illumination enhancement algorithm.

The application provides a kind of large resolution difference non-homologous synthetic aperture radar sea ice drift detection method, comprising: obtaining training sample, constructing super-resolution reconstruction network, and using super-resolution reconstruction network uniform resolution;Based on the high-resolution image pair obtained by super-resolution reconstruction network, feature extraction and coarse matching are carried out;Based on the features after feature extraction and coarse matching, remove the error matching points;Calculate the sea ice drift vector field, obtain complete non-homologous SAR image sea water drift information.The application can realize the full-automatic detection of sea ice drift, and use the advantages of non-homologous SAR high spatial resolution and high time resolution, obtain high-resolution, quasi-real-time sea ice drift field, meet the demand of realizing high-resolution sea ice drift automatic detection from massive SAR data.

The utility model discloses a kind of anti-torque control cables of high shielding effectiveness, belong to cable field, comprising: a plurality of conductor assemblies;Sub-screening layer, including first shielding layer and current-carrying wire, first shielding layer is wrapped in a plurality of conductor assemblies outside, current-carrying wire is resisted to first shielding layer outside;Sub-screening layer wrapped in first shielding layer outside, current-carrying wire is located in sub-screening layer inside;Total shielding layer, including second shielding layer and third shielding layer wrapped in sub-screening layer outside in turn;Outer sheath wrapped in third shielding layer outside, the material of outer sheath is thermoplastic vulcanized rubber.Conductor assembly includes: a plurality of conductor units;Sub-twisted layer wrapped in a plurality of conductor units outside, first shielding layer is wrapped in sub-twisted layer outside.The technical effect of the utility model is in that it not only has high shielding effectiveness, and it is not easy to crack after repeated torsional deformation.

The invention discloses a three-dimensional Gaussian modeling method and system based on Poincare sphere and three-plane representation. The method comprises the steps that a human body image is acquired and preprocessed; inputting randomly generated Gaussian variables into three-plane geometric feature branches to obtain geometric features; inputting a UV mapping graph obtained by fitting when the 3D human body reconstruction network model is trained into a hyperbolic U-net UV feature extraction branch to obtain UV features; and fusing the geometric features and the UV features, inputting the fused geometric features and UV features into a multi-branch decoder to obtain 3D Gaussian rendering core parameters, and synthesizing a 3D human body avatar image based on the 3D Gaussian rendering core parameters. According to the invention, a high-fidelity and real-time 3D human body model can be generated.

The invention discloses a children development problem screening method and system based on structured animation demonstration, and belongs to the technical field of children health. The method comprises the following steps: acquiring identity and age information of a to-be-screened child; determining a screening item set corresponding to the age information in a preset screening item database according to the age information; for each screening item in the screening item set, calling and displaying a structured animation demonstration set to the user terminal; receiving a binary selection instruction of a user for the first animation and the second animation; based on the binary selection instruction, recording a screening result of each screening item; and generating and outputting a screening evaluation report according to the screening results of all the screening items. Through standardized visual alignment demonstration, the complexity of the screening process is reduced, the loss and ambiguity in the information transmission process are reduced, and the accuracy and efficiency of early screening of child development problems are remarkably improved.

This application discloses an active display control device based on gallium arsenide (GaAs) optoelectronic devices. In this device, the GaAs heterojunction field-effect transistor used in the array driving unit, leveraging the material's high electron mobility and the two-dimensional electron gas structure formed by the heterojunction, can instantaneously control the luminous state of the display pixels. Furthermore, it is electrically connected to each display pixel in a one-to-one correspondence, eliminating signal lag caused by multiplexing. Additionally, the GaAs CMOS logic unit, utilizing the properties of GaAs material, can significantly reduce the signal transmission delay of logic gate circuits. Combined with the high-frequency modulation characteristics of pulse width modulation signals, it effectively improves the smoothness of dynamic image transitions. Regarding high-frequency power consumption control, the GaAs heterojunction field-effect transistor can significantly reduce Joule heat loss and static power consumption during high-frequency switching. The cascaded structure of the array driving unit and the GaAs CMOS logic unit can reduce signal attenuation and distortion at high frequencies, reducing the power consumption of the auxiliary amplifier circuit.

The method is mainly applied to the technical field of optical information processing and computational imaging. The invention discloses a multi-plane phase hologram generation method based on deep learning and computer equipment, and the method comprises the steps: constructing a holographic generation neural network model, and training the holographic generation neural network model based on the physical constraint condition of an optical system, so as to simulate a light field propagation process; obtaining various structural feature data, and synthesizing the various structural feature data to obtain standard scene data; and inputting the standard scene data into the trained holographic generation neural network model to generate a holographic phase diagram corresponding to the standard scene data, performing light wavefront modulation in the process of simulating light field propagation, and performing reconstruction to obtain a holographic image. According to the invention, the generation efficiency and reconstruction quality of the multi-plane phase hologram can be improved.

The application provides a ceramic substrate structure and an integrated packaging structure thereof, and belongs to the technical field of packaging. The ceramic substrate structure comprises a substrate plate body, a large chip and a small chip. The upper surface of the substrate plate body is provided with a first groove and a plurality of pads, and the lower surface is provided with a second groove. The first groove is communicated with the groove bottom surface of the second groove. A plurality of metal wires are arranged in the second groove. The metal wires are electrically connected with the pads through a via technology. The large chip is fixedly connected to the top surface of the substrate plate body, and the small chip is fixedly connected in the second groove. The large chip, the small chip and the metal wires are electrically connected through wire bonding. Through the double-sided groove structure and the multi-level electrical connection scheme, the double-sided packaging of the chip is realized, the signal transmission path is effectively shortened, the packaging size is reduced, the heat dissipation efficiency and the electrical performance are significantly improved, and the application is particularly suitable for high-performance chip packaging applications such as back incidence detectors and other double-sided electrical connection applications.

The utility model relates to the technical field of microphone circuits, and discloses an earphone microphone amplifying circuit for internal communication. Comprising a link socket J4, a resistor R47, a resistor R51, a coupling capacitor C36, a resistor R54, a capacitor C62, an operational amplifier chip U1A, a coupling capacitor C46, a resistor R86, a capacitor C61, a selection channel ESWS3, a resistor R63, a resistor R50, a resistor R59, a capacitor C60, a resistor R49, a field tube Q11, a coupling capacitor C33, a resistor R48, a resistor R57, a coupling capacitor C4, a triode Q23, a resistor R52, a resistor R85 and a capacitor C41. According to the invention, the influence of external interference on sound signals is reduced, sound distortion and noise are effectively reduced, and the definition and accuracy of internal communication are improved; compared with the prior art, the circuit provided by the utility model enhances the amplification capability of weak signals, improves the communication reliability, is simple and reasonable in structure, reduces the use of unnecessary elements, reduces the cost and power consumption, improves the stability of the circuit, and provides an earphone microphone amplification solution with better performance for an internal communication system.

The utility model discloses a signal transmission processing circuit for electric eddy current position sensor, include: first operational amplifier, first negative feedback branch, positive feedback branch, first output unit, second operational amplifier, second negative feedback branch, second output unit, first negative feedback branch links with the noninverting input end, output end of first operational amplifier, and first output unit links with the output end of first operational amplifier, and positive feedback branch links with the noninverting input end of first operational amplifier, first output unit, second negative feedback branch links with the noninverting input end, second end, output end of second operational amplifier, the utility model discloses a signal transmission processing circuit for electric eddy current position sensor, through with the voltage of differential signal converts for the transmission of current, utilizes the low sensitivity of current signal to common mode interference, effectively reduces the generation of common mode current to reduce common mode radiation.

The utility model relates to the field of sound equipment wires, in particular to a high-protection sound equipment wire, which comprises a main oxygen-free copper wire, a connecting table and a sound equipment connecting plug, according to the utility model, the two ends of the main oxygen-free copper wire are provided with the connecting benches used for rapidly replacing the sound equipment connecting plugs, the top ends of the connecting benches are provided with the sound equipment connecting plugs used for connecting the sound equipment and transmitting, and the main oxygen-free copper wire is externally provided with the bearing shell used for resisting extrusion in a penetrating manner; the main oxygen-free copper wires and the auxiliary oxygen-free copper wires are vertically arranged in a surrounding mode in multiple groups, the primary insulating tubes are sleeved at the outer ends of the main oxygen-free copper wires and the auxiliary oxygen-free copper wires, the secondary insulating tubes are sleeved outside the primary insulating tubes, and the structure of the main oxygen-free copper wires and the auxiliary oxygen-free copper wires enables magnetic field distribution to be more uniform, reduces loss and distortion of signals in the transmission process, and improves transmission efficiency. The high fidelity of audio signals is ensured, and the metal braided shielding tube and the aluminum foil shielding layer are combined to form an efficient full-band electromagnetic shielding system.

This application relates to a blood flow parameter measurement device, equipment, storage medium, ultrasound probe, and system, belonging to the field of medical devices. The blood flow parameter measurement device includes: a first acquisition module for acquiring first measurement parameters obtained by a first transducer group in imaging mode; a second acquisition module for acquiring second measurement parameters obtained by a second transducer group in imaging mode or Doppler blood flow detection mode; both the first and second measurement parameters include vessel location, vessel depth, vessel diameter, and Doppler angle; a correction module for combining and calculating the first and second measurement parameters to correct the vessel diameter and Doppler angle; and a monitoring module for monitoring the hemodynamic parameters of the target object based on the corrected vessel diameter and Doppler angle. The technical solution of this application can output stable hemodynamic evaluation results.

The utility model discloses a modularized radio frequency assembly, which comprises a base, a radio frequency device is fixedly installed at the top of the base, a plurality of placing plates are slidably connected in the radio frequency device, a groove is formed in each placing plate, a plurality of accommodating grooves are symmetrically formed in the grooves, and the accommodating grooves are connected with the radio frequency device. And springs are symmetrically and fixedly mounted in each storage groove, a clamping plate is fixedly mounted on one side of each of every two springs, and a radio frequency module is placed at the top of each placement plate. According to the modular radio frequency assembly, the grooves, the storage grooves, the springs and the clamping plates are arranged, the two clamping plates can adjust the size of the internal space by means of the elasticity of the springs, and then the two clamping plates are used for clamping and fixing the connecting line, so that attenuation and distortion of signals in the transmission process can be effectively reduced; and information transmission between the signal source and the target equipment is ensured to be accurate, so that the internal structure of the equipment is clear and visible, and daily maintenance and future system upgrading are facilitated.

The invention belongs to the technical field of digital image watermarking, and provides a robust watermarking method based on multi-scale attention to solve the problem that an existing deep learning digital image robust watermarking scheme is insufficient in performance under attacks of JPEG, cutting and the like. An encoder-noise layer-decoder structure is adopted, and the encoder realizes feature extraction and cross-group fusion by designing an MSCAF module; meanwhile, constructing a space attention mask layer to guide the watermark to adaptively adjust the embedding strength according to the image features; the decoder uses the MSCAF to extract the multi-scale features so as to improve the watermark extraction precision. Experimental results show that under JPEG attack training of different quality factors, the PSNR and the watermark extraction error rate of the coded image are both superior to those of an existing comparison algorithm; under combined noise attack training, the average peak signal-to-noise ratio of a coded image generated by the method reaches 38.6738 dB, the watermark extraction error rate is lower than 0.6%, and the method is superior to an existing comparison algorithm.