20results about How to "Improve compression performance" patented technology

The invention belongs to the technical field of terahertz, relates to terahertz communication, and particularly discloses a quasi-optical resonant cavity and a terahertz pulse compression system. According to the invention, the pulse generation module and the coupling compensation module are connected in parallel and are connected to the common reflector through the common coupler, so that function decoupling is realized. In a pulse compression stage, the common coupler introduces an incident terahertz wave beam into two optical paths, and destructive interference occurs between two paths of leakage signals by adjusting the coupling compensation module, so that zero coupling loss is realized, and the problem of large energy loss is solved. Meanwhile, the pulse generation module can independently adjust the optical path of the pulse generation module to control the pulse width, and the adjustment process does not affect the optimized interference condition, so that the high robustness of adjustment is ensured. In the output stage, energy is released by switching the state of the common coupler. Compared with the prior art, low-loss accumulation and robust pulse width continuous adjustment are realized at the same time, so that the terahertz pulse compression effect is remarkably improved.

The application provides a generative image compression method based on vector quantization, and belongs to the technical field of image and video compression. The method comprises the following steps: obtaining a continuous latent representation of an input image through an analysis transformation module; then performing vector quantization processing to obtain discrete indexes of the continuous latent representation and corresponding quantized features; constructing a continuous index probability distribution; predicting a conditional probability distribution of the discrete indexes through a conditional autoregressive entropy model; calculating a coding rate based on the continuous index probability distribution and the conditional probability distribution; reconstructing an image based on the quantized features and constructing a distortion loss; constructing a rate-distortion loss function and jointly training an image compression model comprising the analysis transformation module, the vector quantization module, the conditional autoregressive entropy model and a synthesis transformation module to obtain a trained image compression model; and compressing the input image by using the trained image compression model. The application can realize rate-distortion joint optimization and collaborative improvement of compression efficiency and reconstruction quality.

The utility model relates to the technical field of air compressors, in particular to a waterproof air compressor which comprises a waterproof shell, an air outlet pipe, an air collecting cover, a partition plate and an air compressor shell, the upper portion of the left portion of the waterproof shell is communicated with the air outlet pipe, the funnel-shaped air collecting cover is fixed to the middle of the front portion of the waterproof shell, and an air inlet of the air collecting cover faces forwards and is located in the center. Partition plates are arranged on all the inner wall faces of the waterproof shell, all the partition plates form a closed cavity, the partition plate on the left portion is communicated with the air outlet pipe, the partition plate on the front portion is communicated with the air collecting cover, an air compressor shell is installed in the closed cavity, and the rear portion of the air compressor shell is designed to be in a cross-shaped hollowed-out mode. According to the utility model, the waterproof housing is combined with the separator plate, so that internal parts are not affected by external moisture intrusion; through the combined design of the heat dissipation fins and the embedded electric fan, heat generated by the first motor is effectively conducted and dissipated out, and faults caused by overheating are avoided; the air compressor shell designed in a cross-shaped hollow-out mode is beneficial for evenly distributing pressure, and the air compression effect is improved.

Provided is a vacuum pump having excellent back pressure performance even if a suction gas is hydrogen or the like. A vacuum pump (100) is provided with an exhaust section (114) configured from a turbine pump section (115) having a plurality of layers of rotating blades (102) and fixed blades (123), and a traction pump section (116) positioned further to the exhaust downstream side than the turbine pump section (115), and suction gas sucked from an intake port (101) is discharged from an exhaust port (133) via a gas flow path (FP1) by means of the exhaust section (114). The present invention is provided with: an introduction flow path (FP3) into which an intermediate introduction gas having a higher viscosity than the intake gas is introduced; the introduction flow path (FP3) is connected to the gas flow path (FP1) on the exhaust downstream side of the rotating blade (102) closest to the intake port (101) in the exhaust section (114) among the plurality of layers of rotating blades (102).

The utility model discloses a hexachlorodisilane pretreatment device, and relates to the technical field of semiconductors, through cooperation of a filtering device, a material receiving box, a material pushing mechanism, a compression box, an electric sealing door, a compression mechanism, an electric gate and other parts, hexachlorodisilane is pretreated by the filtering device, and physical impurities fall into the material receiving box below through a waste material outlet. The pushing mechanism pushes waste in the collecting box to the side, away from the waste outlet, of the collecting box. And when the waste materials need to be compressed, the electric sealing door is opened, the material collecting box communicates with the interior of the compression box, and the waste materials enter the compression box. And the compression mechanism compresses the waste materials entering the compression box, and after compression is completed, the electric gate is opened to discharge the compressed waste materials. Physical impurities generated in the hexachlorodisilane pretreatment process are collected, compressed and packaged, centralized treatment is facilitated, and environmental pollution is effectively avoided.

This utility model relates to the field of machining technology and discloses an environmentally friendly chip collection and processing device for valve stem machining. It includes a base, a central seat fixedly mounted on the upper end of the base, and a collection and compression mechanism mounted on the upper end of the base. By compressing the chips and detecting their volume, timely discharge is achieved to ensure efficient collection and discharge of the chips. This environmentally friendly chip collection and processing device for valve stem machining, through the inclusion of a collection and compression mechanism, and the alignment of the storage port and feed port on the rotating disc, can stably collect chips generated during valve stem machining. A support plate temporarily supports the chips in the storage port. A central motor drives the rotating disc to rotate, and the meshing of the central gear and transmission gear, in conjunction with the support wheel, causes the support plate to be continuously struck and vibrated, resulting in a more compact accumulation of waste chips above the support plate, ensuring the continuity of the collection process.

The utility model belongs to the motorcycle clutch technical field, concretely relates to a motorcycle clutch cover assembly body, include: cover, the top centre of cover is provided with the axle cylinder, the top array of cover is provided with a plurality of riveting hole no.

The utility model relates to the technical field of creeping formwork falling prevention, and discloses a hydraulic creeping formwork falling prevention protection device which comprises a wall body, a sliding frame body and a creeping formwork frame body, the inner wall of the sliding frame body is slidably connected with a sliding block driven by a hydraulic system, the outer wall of the sliding block is fixedly connected with the creeping formwork frame body, a rack is fixedly installed on the outer wall of the sliding block, and the rack is fixedly connected with the wall body. A first anti-falling mechanism is arranged on the inner wall of one side of the sliding frame body, a side rail is arranged on the wall face of the side, away from the climbing formwork frame body, of the sliding frame body, a supporting block fixedly connected with the sliding block is slidably connected into the side rail, and a fixing plate is fixedly connected to the wall face of the bottom of the supporting block through a supporting column. When the climbing formwork body falls due to accidents, the sliding block sliding downwards drives the rack to be meshed with the gear and triggers the reset function of the torsional spring, and when the tooth groove of the gear makes contact with the baffle, the first torsional spring pulls back the baffle and clamps the baffle into the tooth groove, so that blocking and locking are achieved, and the climbing formwork body is prevented from falling continuously.

This application provides a method, apparatus, device, storage medium, and program product for compressing a model. It relates to the field of large models. The method includes: determining multiple weight matrices corresponding to a first model to be compressed; obtaining a preset compression parameter set corresponding to each of the multiple weight matrices, the preset compression parameter set including multiple compression levels; determining a target compression level corresponding to each of the multiple weight matrices, such that when the multiple weight matrices are compressed according to the corresponding target compression level, the difference between the total error reduction gain of the multiple weight matrices and a preset global gain is less than or equal to a first preset value, and the total error reduction gain is less than or equal to the preset global gain; compressing the multiple weight matrices according to the target compression level to obtain the compressed target model. This improves the compression performance of the model.

The invention provides an image compression method, an image decompression method, a model training method, a robot and a server, and relates to the technical field of image processing. The method comprises the following steps: acquiring a first image and a second image; wherein the first image and the second image are images of different modes in the same view field; performing feature extraction on the first image and the second image to obtain a first original feature and a second original feature corresponding to different positions in the field of view; performing joint coding on the first original feature and the second original feature corresponding to the same position in the view field to obtain a first fusion feature and a second fusion feature corresponding to the position; and respectively compressing the first fusion feature and the second fusion feature corresponding to each position in the field of view to obtain a first compressed image and a second compressed image. According to the invention, through joint coding of the first image and the second image, redundant data between modes can be reduced, and the image compression effect is improved.

The utility model discloses a kind of waste collecting devices, including collection box and pulverizing box, the side of collection box is equipped with feed inlet, the side of pulverizing box is equipped with the discharge outlet corresponding with feed inlet, the bottom of collection box inner chamber is equipped with the collection box of waste collection, compression assembly is equipped in collection box inner chamber, and waste in collection box is compressed, compression assembly includes pressing plate, and driving mechanism for driving pressing plate to move up and down, pressing plate is above collection box, the outer wall of pressing plate is compatible with the inner wall of collection box, the bottom of collection box is equipped with two groups of lugs, the inner bottom wall of collection box is equipped with two groups of recess for lug clamping. In the utility model, by setting compression assembly, waste in collection box can be compressed, to facilitate subsequent waste transfer;By setting cross plate and four groups of push rods, to ensure that pressing plate is subjected to uniform pressure during compression waste, avoid waste local too tight or too loose situation, improve compression effect.

The utility model relates to the technical field of optoelectronic devices, especially point to a kind of processing device for laser tail fiber packaging laser welding, solve the problem that existing technology tool fixture is not applicable to butterfly laser tail fiber welding, clamping is not firm, including tool main body, the upper surface of tool main body is equipped with mounting groove, the front of tool main body is equipped with connecting seat avoidance groove, connecting seat avoidance groove is communicated with mounting groove, the left and right side walls of mounting groove are equipped with pin avoidance groove, mounting groove is equipped with the clamping block assembly being oppositely arranged with connecting seat avoidance groove in.Instructive effect is: when clamping butterfly laser, connecting seat enters connecting seat avoidance groove, pin enters pin avoidance groove, and then make laser main body enter mounting groove, clamping block assembly clamps laser main body, effectively guarantee the clamping stability of butterfly laser;The tail fiber of butterfly laser is stretched out the mounting groove of processing device upwards, convenient for subsequent butterfly laser tail fiber welding.

The invention provides a traceability log storage and query method based on deep embedding and single-layer RNN prediction, and relates to the technical field of traceability graph compression, and the method comprises the steps: converting a system bottom layer audit log into a traceability graph, carrying out the coding mapping of path class and identification class attribute fields through deep learning embedding representation, and obtaining a traceability graph; coding prefixes are distributed for the path type attribute fields and the identification type attribute fields through self-adaptive dictionary coding, and numerical attribute fields are recorded through incremental coding; preprocessing and learning the traceability graph through a single-layer recurrent neural network (RNN) unit; performing local adjustment on the traceability graph during data updating based on incremental coding and adaptive mapping; and mapping the query condition into an attribute coding prefix, reconstructing an attribute sequence based on the attribute coding prefix, and performing correction through the adjustment table. For redundant information and structural similarity, a deep learning embedding representation technology and an adaptive dictionary coding strategy are adopted, and shared codes of similar attribute fields are effectively learned and extracted, so that redundant data storage is reduced.

The present application relates to the field of data processing, more particularly, the present application relates to a kind of self-service customer service data storage method for electric power business, method includes: obtaining the self-service customer service data sequence of electric power business handling;In succession, each data in self-service customer service data sequence is encoded and is handled, to realize data storage;The encoding process of any one data includes: calculate the distribution deviation degree of inheritance real-time probability distribution model, control real-time probability distribution model update according to the distribution deviation degree of inheritance real-time probability distribution model, obtain the real-time probability of the data coding based on real-time probability distribution model and overall probability distribution model and overall probability, the comprehensive probability of real-time probability and overall probability is obtained by weighted calculation;Based on comprehensive probability, the data is encoded and handled using arithmetic coding algorithm. Improve self-service customer service data compression effect.

Disclosed is an image data encoding / decoding method and apparatus. A method for decoding a 360-degree image comprises the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Here, the step of generating the prediction image comprises the steps of: obtaining, from motion information included in the syntax information, a motion vector candidate group including a motion vector of a block adjacent to a current block to be decoded; deriving a prediction motion vector from the motion vector candidate group, on the basis of selection information extracted from the motion information; and determining a prediction block for the current block to be decoded, using a fmal motion vector derived by adding the prediction motion vector to a differential motion vector extracted from the motion information.

The application belongs to the technical field of combined valves of compressors, and particularly relates to an air inlet and outlet combined valve and a compressor with the same, which comprises: an air inlet valve seat for passing fluid medium; an air outlet valve seat installed at the bottom of the air inlet valve seat for discharging fluid medium; an air inlet valve plate movably connected to the inside of the air outlet valve seat for controlling the inlet amount of flowing medium, the bottom of the air inlet valve plate being movably connected with an air inlet spring plate; and an air outlet valve plate movably connected to the inside of the air inlet valve seat for controlling the outlet amount of fluid medium, the top of the air outlet valve plate being movably connected with an air outlet spring plate. The application has the advantages of simple operation, safety and stability, strong adaptability, high regulation and control, compressed flow of different flowing media, high compression efficiency, good compression effect, actual compression demand, high stability, strong continuous flow, good fixed-point cooling effect, stable working environment of the air inlet and outlet combined valve and the compressor, and the like.

The utility model relates to ice cream stick production technical field, and disclose a kind of sawdust collecting device for ice cream stick production, including collection shell and the blocking door of installation in its lower opening, further include: the fan of setting in the one side of collection shell, the air inlet of fan is connected with fixed shell, the inner chamber of fixed shell is embedded with filter screen, the inner chamber of fixed shell is equipped with the cleaning mechanism of reducing sawdust on the surface of filter screen by rotation mode;The utility model can guide sawdust by the cooperation of guide mechanism, so that it can be in the middle part of the inner chamber of collection shell, while the cooperation of cylinder and compression mechanism can be guided and extruded after sawdust under the action of shape, and under the cooperation of cleaning mechanism, the surface of filter screen can be cleaned at any time, so as to reduce the condition that filter screen is blocked by sawdust, solve the problem that the compression effect is not good when the existing device is used, and the applicability is poor.

The application discloses a kind of based on bounded integer sequence and data stream fusion encoding decoding method and device, encoding part includes: the object to be compressed is attempted to multiple compression methods, and the optimal compression scheme is selected according to error size;In optimal compression scheme, the bounded integer sequence in the encoding content is encoded in bounded integer sequence;In optimal compression scheme, the compression method selection mark in the encoding content is encoded;Compression method selection and bounded integer sequence are data stream fusion;Output actual compression data stream;Decoding part includes: compression data stream in identification compression method mark;According to the compression method identified, the remaining part in fixed length compression data is decoded in bounded integer sequence.

The application discloses a rollbackable flow table compression method, a flow table compression system, equipment and a medium. The method comprises the following steps: defining flow tables of network equipment with all flow table utilization rates greater than a preset utilization rate as high-risk flow tables; predicting subsequent traffic of the high-risk flow tables according to current flow table item information and historical flow table item information; determining a compression strategy of the high-risk flow tables according to the subsequent traffic, obtaining corresponding compressed flow tables, and performing flow table update processing on corresponding network equipment according to the compressed flow tables; in response to forwarding consultation information sent by the network equipment according to the updated compressed flow tables, calculating a negative influence value of a compressed flow table item in the compressed flow table; and performing flow table item rollback processing on the compressed flow table item with the negative influence value greater than a preset influence value. According to the application, the subsequent traffic is predicted to improve the flow table compression effect, and the rollback operation of the compressed flow table item can be performed to slow down the negative influence caused by the flow table compression.

The invention provides a semi-closed supercritical CO2 Brayton power generation system and method, and belongs to the technical field of energy. The semi-closed type supercritical CO2 Brayton power generation system comprises a supersonic speed gas-liquid separator used for cooling, depressurizing and separating supercritical CO2 obtained after heat exchange of a heat regenerator and separation of a moisture separator in a semi-closed type Brayton power generation cycle, and working medium CO2 gas and liquid CO2 are obtained; and the compressor is used for converting the working medium CO2 gas into supercritical CO2 and recycling the supercritical CO2 in the semi-closed Brayton power generation cycle.