203results about How to "Guaranteed compression" patented technology

The invention provides a method and a device of multiple description video coding based on a relevance optimization rule, belonging to the field of video coding. The device comprises a coder, a decoder, a channel 1 and a channel 2, wherein the coder comprises a similarity optimization rule module, a preprocessor, an odd and even frame separator, a standard coder 1 and a standard coder 2; and the decoder comprises a standard decoder 1, a standard decoder 2, an odd and even frame interleaver and a postprocessor. The video coding method better keeps time domain relevance in a video subsequence by using the relevance optimization rule aiming at different motion information on the premise of guaranteeing the compression performance of each video sequence, thereby ensuring that a one-way decoder can more effectively restore lost information so as to improve the reconstruction quality of the one-way decoder.

The invention relates to the technical field of a ball valve, and in particular relates to a device and a method for assembly and test of a PE ball valve. The device comprises a control unit, a workbench (1), a first valve seat screwing mechanism, a second valve seat screwing mechanism, a clamping mechanism and a torque measuring mechanism, wherein the first valve seat screwing mechanism is used for screwing a valve seat into a valve body; the second valve seat screwing mechanism is also used for screwing a valve seat into a valve body; the clamping mechanism is used for clamping the valve body; the torque measuring mechanism is used for measuring a ball valve torque; the clamping mechanism is fixed on the workbench (1); the first valve seat screwing mechanism and the second valve seat screwing mechanism are respectively arranged at two sides of the clamping mechanism; the torque measuring mechanism is arranged on the workbench (1); and the first valve seat screwing mechanism, the second valve seat screwing mechanism, the clamping mechanism and the torque measuring mechanism are all electrically connected with the control unit. By using the device and the method, the PE ball valve is high in assembly efficiency, good in consistency and assembly quality.

The invention relates to a lossless data compression method based on LZ77, an error code repair method, an encoder and a decoder. The compression method comprises the steps of: reading to-be-compressed character strings, and acquiring an encoded symbol sequence and to-be-encoded character strings; according to a sliding window parsing sequence, sequentially searching and recording longest matchingprefixes of a current to-be-encoded character string from the encoded symbol sequence; according to the matching multiplicity of the longest matching prefixes of the current to-be-encoded character string, determining embedded bit information; carrying out mapping on the embedded bit information and each longest matching prefix of the current to-be-encoded character string one by one; and according to a preset embedding value, selecting the corresponding longest matching prefix as a code word of the current to-be-encoded character string, outputting the code word, and until the code words ofall the to-be-encoded character strings are output, completing data compression. According to the invention, in a case of not losing any compression capability, additional redundant data can be protected by utilizing a channel encoder so as to correct a limited number of errors; and the lossless data compression method, the error code repair method, the encoder and the decoder have high compatibility and practicality.

The invention discloses an earthquake data compression method based on tensor adaptive rank truncation. According to the method, based on given compression conditions and a different-dimension singular value setting truncation rank acquired through instant higher-order singular value decomposition, tensor decomposition is carried out further according to singular value distribution determination truncation rank magnitude; on the condition that a compression rate is guaranteed, a compression peak value signal to noise ratio is improved, and the compression effect is improved; through designing the tensor decomposition flow based on adaptive rank truncation, manual parameter regulation and control in the compression process can be reduced, and data compression work is simplified. On the basis of the singular value distribution setting truncation rank magnitude, data anisotropy characteristics are utilized, a singular value standard deviation is introduced to calculate weight of a truncation rank corresponding to different dimensions, the compression peak value signal to noise ratio is improved, and the data compression effect is further improved.

The invention discloses an asynchronous distributed deep learning training method, device and system. The method is applied to a computing node k, the computing node performs the forward propagation through the local model parameters and the local data to obtain the loss values, then the gradient updating is obtained via the backward propagation, and only the values with larger information amount in the gradient updating vectors are sent by using the sparse function, so that the communication traffic from the computing node to the parameter server is effectively reduced. On the basic concepts of the asynchronous random gradient descent and a parameter server, the gradient of the computing node is returned via the parameter server, the communication compression is carried out, the compression rate of the communication is effectively guaranteed. The compression rate of communication is continuously increased along with the continuous training, and a better compression effect and a higher communication speed can be achieved.

The invention provides an electric brake boosting device, and relates to an automobile running brake system. In the device, the force of a brake pedal is transmitted to a piston of a brake main cylinder through a pedal push rod, a push rod spring and a boosting screw rod, the brake pedal is provided with a brake pedal position sensor to sense the operating intension of a driver, an electronic control unit determines the quick degree of providing boost on the basis, calculates the boosting travel according to the preset compression of the push rod spring between the pedal push rod and the boosting screw rod, and controls a step motor to drive a boosting gear through a reducing gear, so that a thread mechanism drives the boosting screw rod to linearly move to realize boosting brake. When the brake pedal stops, the motor does not rotate, and the device maintains the braking force by means of the self-locking function of threads. When the brake pedal is released, the motor rotates reversely, and the boosting screw rod returns to the original position under the action of the reducing gear and the thread mechanism. The foot feel during brake is ensured by keeping the compression of the push rod spring, the boosting effect is obvious, and the structure is simple.

The invention discloses bamboo charcoal profiled fiber with good product quality and low production cost, and a preparation method thereof. The fiber comprises the following components in percentage by weight: 94-99 percent of melt-spun slices, 1-6 percent of bamboo charcoal fine particles, 0.05-0.5 percent of surfactant and 0.1-1 percent of antioxidant, wherein the melt-spun slices are polyester, polyamide, polypropylene, polyethylene and modified polymers of polyester, polyamide, polypropylene and polyethylene; and the bamboo charcoal fine particles are black bamboo charcoal or white bamboo charcoal with the particle sizes of less than 2 mum. The preparation method comprises the following steps of: (1) preparing the bamboo charcoal fine particles according to a certain proportion, adding the surfactant and the antioxidant into a double-screw machine in a mixed conveying way, and directly putting the dried melt-spun slices into the hybrid double-screw machine; (2) melting and extruding the melt-spun slices in the double-screw machine, uniformly mixing the melt-spun slices with the bamboo charcoal fine particles and an aid, and conveying the mixture into a spinning box for direct spinning, by means of connection of a flange bent pipe; (3) spinning a blend melt with a spinning component from a spinneret plate, cooling, blowing and winding to obtain bamboo charcoal profiled nascent fibers; and (4) performing stretching twice and heat setting according to a continuous yarn or short yarn post-processing procedure. The invention is suitable for the bamboo charcoal profiled fiber and preparation thereof.

The invention provides an optical fiber contact member part comprising a contact member body which extends in a left-and-right direction. The contact member body is externally provided with a positioning shell. The positioning shell is fixedly provided with an abutting stop guide structure used for left-and-right penetration of the contact member body in a left-and-right direction relatively. The butting maintenance spring affects between the abutting stop guide structure and the contact member body. The positioning shell is provided with a positioning shell blocking surface of which the blocking direction is rightward. The contact member body is provided with a contact member blocking surface which is matched with the positioning shell blocking surface in a blocking way. The positioning shell is also provided with a right positioning surface which is used for being matched with a left positioning surface arranged on the positioning shell of a contact member part adaptive to the optical fiber contact member part in the blocking way at the plugging position. When the optical fiber contact member part is used, amount of compression of the butting maintenance spring is ensured to be maintained within the set range so that great butting of the two adaptive contact member parts can be guaranteed and the effect of optical signal transmission can be enhanced.

The invention discloses an encoding method, an encoding device, a decoding method, a decoding device, electronic equipment and a storage medium, and belongs to the technical field of data processing.The encoding method comprises the following steps of: dividing an image to be encoded into a plurality of image blocks, performing feature transformation on a first image block in the plurality of image blocks through using a transformation convolutional neural network to obtain a first transform domain component corresponding to the first image block, and quantizing the first transform domain component to obtain a quantization result of the first transform domain component; determining probability distribution of the quantization result of the first transform domain component through using aprobability estimation network; and encoding the quantization result of the first transform domain component based on the probability distribution of the quantization result of the first transform domain component. The sizes of the plurality of image blocks are possibly different, so that the compression rate and the distortion rate of the encoded image can be further ensured after the image blocks with different sizes are encoded on the basis of feature change of the transform convolutional neural network.

The invention relates to a flexible water-absorbing scraper of an intelligent cleaning device. The flexible water-absorbing scraper comprises a front adhesive strip, a rear adhesive strip, a water-absorbing scraper body and a water-absorbing pipe, wherein the front adhesive strip and the rear adhesive strip are correspondingly arranged on the front side and the rear side of the water-absorbing scraper body respectively, the water-absorbing scraper body is arranged below the rear side of a chassis of the intelligent cleaning device and is connected with the chassis through a floating structure,the bottom of the water-absorbing scraper body is open, multiple universal wheels are arranged at the bottom of the water-absorbing scraper body, the water-absorbing scraper body can perform verticaltelescopic motion through the floating structure, the lower end of the water-absorbing pipe extends into the water-absorbing scraper body, and the upper end of the water-absorbing pipe is communicated with a water inlet of an external water-absorbing motor. The flexible water-absorbing scraper can adjust the height and posture of the water-absorbing scraper through the arranged floating structurein a self-adaptive mode when passing through an uneven ground, it can be ensured that the water-absorbing scraper can well fit the ground on the different road surfaces, abrasion of the front adhesive strip and the rear adhesive strip can be also effectively reduced, and the maintenance cost of the intelligent cleaning device is reduced.

The invention discloses a data compression method, and belongs to the field of data processing. The method comprises following steps of obtaining to-be-compressed data and m reference data blocks, wherein m is greater than 1 and m is an integer; matching the to-be-compressed data with the m reference data blocks; and obtaining at least one index code, wherein each index code comprises reference data block identifiers and character string information, each reference data block identifier indicates one reference data block in the m reference data blocks, and each piece of character string information indicates the position information of continuous character strings of the to-be-compressed data in the reference data block. According to the device and the method, the compression efficiency is improved by compressing the to-be-compressed data by multiple reference data blocks.

The invention provides a sealing gasket of a cylinder head cover. The cross section of the sealing gasket is in a T shape, at least two mutually parallel enclosed sealing convex ribs are arranged along the length direction of the sealing gasket and on the binding face of the upper part of the sealing gasket and a cylinder head, three parallel oil storage tanks are arranged at the two sides and between the two sides of the sealing convex ribs, so that the compressibility of the sealing gasket is ensured, the oil flows into the oil storage tanks, and the oil can not leak out from a cylinder cover and the cylinder head. A group of vertical long-arc strip-type bosses are arranged at the two sides of the waist-shaped part of the cross section of the sealing gasket and are in interference fit with the sealing groove of the cylinder cover, thus when the sealing gasket is preassembled, the sealing gasket can be fixed in the groove to improve the sealing reliability. The sealing gasket of the cylinder head cover can ensure reliable sealing between the cylinder head cover and the cylinder head which are arranged on a high-performance supercharger engine, thereby improving the service life of the product, simultaneously being favorable for assembly and improving the efficiency.

The present invention relates to a drive device for pulsating type blood pump and its control method. Said drive device includes the following several portions: piston, piston cavity, connecting rod, crankshaft, stepping motor, motor driver, computer, initial point detector, operation keyboard, display, piston cavity nozzle and pressure pipeline. Said invention also provides its working principle and concrete operation method.

The invention relates to a spring assembly loading and unloading tool. The tool comprises a clamping frame; a pressing mechanism is arranged on the clamping frame; the pressing mechanism comprises an upper force applying part and a lower force applying part connected with an upper spring seat and a lower spring seat of the spring assembly to apply tension or pressure on the spring of the spring assembly; and an assembly channel for enabling the upper spring seat and the lower spring seat to move to the upper force applying part and the lower force applying part along a direction perpendicular to an up-down direction and to move out from the upper force applying part and the lower force applying part is arranged on the clamping frame and/or the pressing mechanism, and thus, the loading and unloading tool can enable the spring assembly to be loaded and moved out along the direction vertical to the up-down direction. The spring is compressed or stretched through the pressing mechanism, the loading and unloading process can be completed by the force pressing mechanism, the structure is simple, and the efficiency is high.

The embodiments of the invention disclose an image processing method and device. The method provide by the embodiments of the invention comprises: the image processing device dividing acquired images into macro-blocks; for a current macro-block, the image processing device calculating the discrete characteristic coefficient of the current macro-block; when the discrete characteristic coefficient is greater than or equal to a preset first threshold, the image processing device extracting the sub-boundary component value of the current macro-block by using an edge extraction operator; the image processing device calculating the sub-block edge intensity coefficient of the current macro-block according to the sub-boundary component value; the image processing device determining an image dividing mode according to the sub-block edge intensity coefficient and a preset threshold set; and the image processing device outputting the image dividing mode. The embodiments of the invention also provide the image processing device. The method and device provided by the invention can reduce the calculating burden at a coding end under the condition that the image compression efficiency is ensured.

The invention provides an elastic sealing element, which comprises a body made of elastic materials, wherein the body consists of a supporting part and a compression part which are integrally formed, the bottom of the supporting part is a plane, the compression part is a bulge extending out from the top of the supporting part, and at least one wing part is convexly and outwards arranged on the supporting part on at least one side surface of the body. The invention has simple structural design, the compression amount of the sealing element is fully ensured by the compression part arranged on the supporting part, so line seams can not be generated on combining surfaces between connecting elements, the plane at the bottom of the supporting part has the effect that the sealing element can stably sit at the bottom of a sealing groove when being assembled, further, the outwards projected wing part on the supporting part can ensure that the sealing element can be clamped in the sealing groove, the sealing effect of the sealing element is good, and in addition, the assembly is very convenient.

The invention provides a method for compressing and uncompressing a video image and a circuit for LCD overdriving. The video image compressing method comprises the following steps: partitioning the video image into 2*4 blocks to obtain 8 pixel points of a current block; choosing an encoding regulation according to classifying result and gradient information of the current block; and compressing the current block according to the encoding regulation. The invention can choose the relevant encoding regulation with four times of compression ratio by using the classifying result and the gradient information of the video image blocks, so that the method can obtain four times of compression ratio and ensure the compression property at the meantime.

The invention discloses a pruning method applied to target detection and a terminal. The pruning method comprises the following steps: training a preset target detection algorithm until convergence; determining a pruning proportion corresponding to each network layer according to the norm of the weight of each network layer in the converged deep neural network model of the target detection algorithm; clustering the weights of all channels in the network layer corresponding to the pruning proportion according to the pruning proportion, and determining a clustering center corresponding to each network layer; according to the clustering center and the pruning proportion corresponding to each network layer, pruning channels in the network layer where the network layer is located; realizing pruning of channels of each network layer in the deep neural network model based on norm weight clustering; and deleting redundant channels to compress the deep neural network model, thus the pruning process is simple, consumed time is short, dependence is little in the pruning process, dependence on any parameter and a specific layer is not needed, and meanwhile precision loss is reduced while compression is guaranteed.

The invention discloses a spatio-temporal trajectory compression method based on a trajectory dictionary, comprising two parts of establishing a trajectory dictionary set and performing trajectory compression based on the trajectory dictionary set. In this manner, for spatial trajectory data and temporal trajectory data, three methods of trajectory establishment and two algorithms of trajectory compression are proposed, which guarantee the compression rate, guarantee the high quality of trajectory compression, and have the advantages of high reliability and high accuracy. At the same time, themethod has a wide market prospect in database, data analysis, data mining, trajectory data query and analysis, and the application and popularization of trajectory data mining.

The invention belongs to the technical field of welding detection, and particularly discloses a mobile phone component welding detection device. The device comprises a rack, an air amplifier, an air storage unit, a rotating unit and a transmission unit, wherein the transmission unit comprises a rotating rod; a first gear and a cam are fixed on the rotating rod; a clamping mechanism is arranged onthe rotating rod; the transmission unit comprises a rotating shaft and a motor; an electromagnet and a second gear are arranged on the rotating shaft; the air storage unit comprises a pump, an air storage cylinder and a threaded rod; a third gear is fixed on the threaded rod; a one-way air inlet valve is arranged on the pump; a piston is connected with the inside of the pump in a sliding manner; the inside of the air storage cylinder is connected with a pressing plate in a sliding manner, and the pressing plate is in threaded connection with the threaded rod; a first air pipe is connected between the air storage cylinder and the pump; a one-way air outlet valve is arranged on the first air pipe; an air exhaust port is formed in the air storage cylinder; the inside of the air storage cylinder is connected with a sealing plate for sealing the air exhaust port in a sliding manner; and a second air pipe is connected between the air storage cylinder and a compressed air inlet. By use of themobile phone component welding detection device disclosed by the invention, the welding quality problem can be effectively detected.

The invention discloses an information compression/decompression method and device, and the method comprises the steps: dividing a to-be-processed text block into different text regions, and providinga precondition that the text block can be split into text lines for the subsequent line feature analysis of the text regions, thereby guaranteeing compression of text information through the distribution features of texts, and improving compression efficiency of text information. The compression efficiency of the text information is improved, and meanwhile, the transmission definition of the textinformation is improved.

The invention relates to a compression garbage truck with top-mounted pushing mechanisms. The compression garbage truck comprises a dustbin located on a truck chassis and a garbage compression mechanism connected to the dustbin. A garbage guide-in opening is formed in the top of the dustbin, and a garbage guide-in face is arranged on the wall face of the bottom of the dustbin. The garbage compression mechanism comprises a garbage compression plate. A sealing portion is arranged at the other end of the garbage compression plate. The rotating position between the garbage compression plate and the outer wall of the top of the dustbin serves as a rotating site A, and the rotating site A is located at the garbage guide-in opening in the horizontal direction. The pushing mechanisms used for driving the garbage compression plate to rotate relative to the rotating site A are further arranged on the dustbin on the opening on the outer wall of the top of the dustbin. The garbage compression plate moves into the dustbin through the garbage guide-in opening, and when the garbage compression plate rotates, the arc formed by the rotating path of the sealing portion is tangent to the surface of the garbage guide-in face. The garbage compression plate is of an inward concaved structure in the longitudinal direction, and the inward concaved face of the garbage compression plate backs on to thelinear pushing mechanism.