155results about How to "Fast compression" patented technology

A controllable watch winder for a self-winding mechanical watch, in which a turntable is provided to hold and rotate the watch, including a programmable microprocessor circuit configured to count the number of rotations executed by the turntable. In one aspect, the watch winder is configured to introduce, after the electronic circuit is activated, a delay period before the turntable commences rotating. In another aspect, the circuit may be configured to interrupt the rotation of the turntable with pauses, to break up the rotation into cyclical sets. The circuit may be configured to automatically predetermine the number of rotations in each set. In yet another aspect, the watch winder may be configured to be manually adjustable, to variably predetermine before use, the number of rotations to be executed by the turntable and the length of any pause between rotations.

The invention discloses a data compression method, device and system and a server. The data compression method comprises a calling module, an acquisition module and a compression module, wherein the calling module is used for calling a pre-stored compression mode configuration table including the corresponding relationship between file types and compression modes; the acquisition module is used for acquiring the file types of data and determining whether the compression modes corresponding to the file types exist or not according to the compression mode configuration table, and if yes, acquiring the compression modes corresponding to the file types; and the compression module is used for compressing data to be compressed according to the compression modes acquired by the acquisition module. By virtue of the technical scheme provided by the invention, suitable compression modes can be automatically configured for users, and the compression speed is increased under the condition that the compression ratio is almost not lost, so that both the compression time and the system resource are saved.

An apparatus and method of compressing a structured document. The structured document is searched once for first and second marks, a first mark indicating a start of an element of the structured document, and a second mark indicating an end of an element of the structured document. When encountering a first mark in the searching step, a representation of the first mark is output and a level counter is incremented, a value of the level counter indicating on which level in the structured document an element is located. When encountering a second mark in the searching step, a second code data is output and the level counter is decremented.

The invention discloses a satellite image compression method and a device for realizing satellite image compression, belonging to the remote sensing and digital image processing field and solving the problems of high demand for encoded data transmission error rate and low processing speed in the existing image compression method. The method of the invention includes the steps of dividing a whole image into sub-images, independently encoding the sub-images, sequential initialization, removal of pixel redundancy, context extraction, preestimate, Golomb encoding and data polymerization; the steps of sequential gradient calculation and context environment parameters upgrade are finished simultaneously with the steps of preestimate and Golomb encoding. The invention improves image compression rate, realizes good error tolerance and good real-time performance and greatly improves the whole encoding efficiency, meeting the demand for wide satellite image data real-time nondestructive compression.

The invention provides a fractal and H.264-based hyper-spectral image compression method. The method comprises the following steps: firstly, converting a hyper-spectral image data cube into video of a YUV (Luma and Chroma) format and transmitting into a coder; performing intra-frame prediction on I frame of the hyper-spectral video by using a macro block flatness-based H.264 fast intra-frame prediction mode discrimination method to remove spatial correlation of a hyper-spectral image; performing block motion estimation/complementary fractal coding on P frame of the hyper-spectral video to remove spectral correlation of the hyper-spectral image; searching optimal matching blocks from a reference frame for various blocks of tree structures of the P frame coded macro block by an MSE (Mean Square Error) criteria, determining an iterative function system coefficient of each block, comparing the rate distortion costs of all block division modes, taking the block division mode with the least rate distortion rate as the final inter-frame coding mode, and recording a final fractal parameter; finally coding and writing residual data of the I frame and the P frame into a code stream by entropy coding CABAC after DCT (Discrete Cosine Transformation) and quantization, wherein the fractal parameter of the P frame is also subjected to CABAC entropy coding.

The present invention discloses a compressing method of the data recorded by the electric power waveform. The compressing process includes the steps of: the collected data is performed by the integer small wave conversion based on the rising format and then all the data having been converted is coded in the Huffman method; the decompressing process includes the steps of: each pressing data that is read in bit is decoded in Huffman method, and then the data having been decoded is performed by the integer small wave contra-conversion. The present invention has the characteristics of a small amount of computing, a high compressing rate, a small distortion factor, a small occupied computer resources, etc. and the method can be realized in a flushbonding system. The compressibility and the distortion factor can be adjusted according to the demand and the flexibility of the using of the software is added. The present invention can also provide a threshold value to the detail information to realize the lossless compressing and the lossy compression. The electric power system waveform recording device in the present can realize a long-time and continuous recording waveform by combining the electric hardware technology under the situation of high sampling rate and big capability and the waveform can be transmitted far away through the communication interface reliably and quickly.

The invention provides a multi-thread fast storage lossless compression method for FASTQ data, and is applied to compression of a DNA sequence. The method comprises a data classification step of inputting original FASTQ data, and dividing short reading of the original FASTQ data into three data flows, namely metadata, a mass fraction and a base sequence; a data compression step of aiming at the metadata, using an incremental encoding way to detect and eliminate redundant information of the metadata; aiming at the mass fraction, using a bit level PPM (Prediction by partial matching) prediction model and arithmetic coding to compress; aiming at the base sequence, using improved arithmetic coding of a fixed order to compress; and a data output step of archiving and merging compression results of different data flows, and outputting final data after compression. The invention further provides a multi-thread fast storage lossless compression system for the FASTQ data. The technical scheme provided by the invention can improve the compression efficiency and compression speed.

The invention discloses a floating-point-type data lossless compression method for scientific calculation. A data compression part comprises steps: a symbol domain, an exponential domain and a mantissa domain of floating-point-type data are mapped respectively and compressed respectively and the compressed data is stored with a binary bit as a unit. A decompression part comprises steps: effective data of the mantissa domain difference, the exponential difference, the symbol domain and the like are obtained from flag bits, and original data is recovered completely according to the IEEE754 format and reference data. In the compression method, data is divided according to physical meanings of floating-point-type data, and the compression ratio is high. The compression method has no excessive data prediction or transformation algorithms, and thus the compression speed of data is accelerated.

The invention discloses a data compression method based on Huffman coding, comprising the following steps of selecting target data from original data; by means of a dynamic Huffman coding algorithm, generating a local dynamic coding table corresponding to each character of the target data; detecting whether to-be-coded characters in the original data are located in the local dynamic coding table; if so, coding the characters through the local dynamic coding table; if not, coding the characters through a fixed coding table; and storing a data file formed after coding and the local dynamic coding table together as a compressed file of the original data. Obviously, as compared with static Huffman coding, the scheme provided by the invention has better compression ratio; and as compared with the conventional dynamic Huffman coding, the scheme provided by the invention has faster compression speed and lower coding table storage overhead. The invention also provides a data compression system, a data decompression method and a data decompression system based on the Huffman coding, which also can achieve the above technical effects.

The invention discloses a method for compressing and decompressing a single picture. The method includes creating at least one flag array, classifying pixels of a scanned picture into N types to be stored in the N array according to the preset mode, and recording storage positions of the pixels in the designation array; subjecting the pixels in the N array to direct-current level displacement; converting the scanned picture into YUV (luma and chroma) color space if the scanned picture is a colored picture of RGB (red, green and blue) mode; subjecting each array of the N array to one-dimensional wavelet transform according to each pixel component; and compressing the flag array, writing data into files according to preset sequence to obtain the compressed picture. Compression speed can be increased by classifying color or gray level of the picture by utilizing picture energy as criteria according to a mode of binary tree, picture information loss can be reduced to the greatest extent, high compression is realized and data quantity of the picture is greatly decreased.

The invention belongs to the field of navigation satellite applications and data processing, in particular to a new GNSS observation value data compression and decompression method which comprises the compression and the decompression of rough coordinates and antenna height information in GNSS observation values, the compression and the decompression of time data based on a sexagesimal system, the compression and the decompression of satellite numbers based on the sexagesimal system, the compression of the GNSS observation values based on the sexagesimal system and the recurrence differentialalgorithm, and the integration of the GNSS observation values based on the sexagesimal system and the recurrence integration algorithm.

The invention discloses methods for encoding and decoding an observed value file of a global positioning system (GPS), and mainly aims at management of data transmission and data storage in a network system of a high-frequency sampling large-size reference station. In the methods, a plurality of epoch data are used as a storage unit stored into a single module; in each single module, the epochs of an original file corresponding to the single module are processed by a secondary subtraction method so as to finally form a compressed data sequence to replace the position of the corresponding data in the original file. By adopting the technical scheme, the compression ratio is within 5 percent; as to the file compression in a network real time kinematic (RTK) system, the method is quick and efficient; and the pressure of a data link for transmitting the data is relieved and the cost for data transmission is reduced.

The invention belongs to machining auxiliary equipment, particularly relates to a hydraulic compacting device adopting hydraulic tightening. The hydraulic compacting device comprises a base body, and is characterized in that a hydraulic cavity and a cover board for sealing the hydraulic cavity are arranged on the lower right side of the base body; an oil inlet is arranged on the cover board; an oil outlet communicated with the hydraulic cavity is arranged below the base body; a piston is arranged in the hydraulic cavity; a piston rod extending out off the hydraulic cavity is connected on the piston; a sliding press plate is arranged in a sliding chute at the top of the base body; and the piston rod is connected with the press plate through a connecting rod mechanism. The hydraulic compacting device of the invention adopts piston driving and drives the press plate to move through a connecting mechanism.

The invention discloses a multithread concurrent data compression method based on an FT processor platform. The implementation steps include that compression parameters are obtained, a compression queue and a write queue are initialized, and a write thread is enabled; each portion of segmented compression data information is determined according to the compression parameters and is stored in the compression queue; compression threads are created according to the determined number of compression threads, each compression thread reads the corresponding segmented compression data according to the received segmented compression data information and carries out compression meta operation, and the compression result data is stored in the write queue; the write thread continuously reads the write queue and writes the compression result data into a result buffer for splicing, meanwhile the compression result data in the write queue already written into the result buffer is released, and finally, the data result after compression is obtained in the result buffer. The multithread concurrent data compression method based on the FT processor makes full use of the multi-core and multithread features of the FT processor and has the advantages of good data compression concurrency, high data compression speed, high data compression efficiency and good compatibility.

The invention provides high-efficiency and environment-friendly garbage disposal equipment, which includes a screening chamber outer casing and gears; the bottom of the screening chamber outer casing is welded to the top of the crushing chamber outer casing; the bottom of the crushing chamber outer casing is connected to the mill The top of the outer casing of the grinding chamber is welded; the bottom of the outer casing of the grinding chamber is welded to the top of the outer casing of the compression chamber; It is fixedly connected with the two extruding blocks; the outer wall of the right end of the outer shell of the compression chamber is provided with a partition plate that runs through the outer wall of the right end of the outer shell of the compression chamber and is movably inserted into the inner cavity of the outer shell of the compression chamber . After the domestic waste is crushed, the present invention grinds the crushed domestic waste, which is beneficial to the subsequent compression treatment operation, can quickly complete the compression treatment, and accelerates the treatment efficiency of the domestic waste.

The invention discloses a simple fast pressing plate which is used for pressing workpieces and is a universal clamp. The simple fast pressing plate is composed of a pressing plate body, a screw rod, a handle, an eccentric cam, a gasket and a nut, wherein the eccentric cam transversely penetrates through the screw rod, the handle is connected with the eccentric cam, on the basis of the principle of the eccentric cam, the simple fast pressing plate is adjusted to be in a proper position by rotating the handle, and then the workpieces are pressed by the simple fast pressing plate. The simple fast pressing plate solves the problem that the clamping force of an ordinary pressing plate is not sufficient, is high in pressing speed and efficiency and has been widely used in work currently, and production efficiency and safe reliability are improved.

The invention discloses an integer compression method and device, which belongs to the field of data compression. The method comprises the steps of obtaining a set of integers to be compressed, the integers to be compressed having the same length and different values; bucket-sorting the integers to be compressed, and generating a target bit array which corresponds to the set of integers to be compressed and has array bits corresponding to the integers to be compressed in the set of compressed integers; and compressing the target bit array by a predetermined compression algorithm to obtain corresponding compressed data to the set of integers to be compressed. Compared with the Huffman coding algorithm by which repeated traversal of the integer set affects the compression speed, the integer compression method and device in the embodiment of the invention only require a single traversal of the set of integers to be compressed in the whole compression process, thereby increasing the compression speed of the integer set.

The invention is applicable to the field of substations and provides a method and a device for compressing data frames of a substation. The method comprises the following steps of: monitoring a data frame sequence of the substation, and storing the first data frame in the data frame sequence; performing the following steps sequentially on the rest data frames in the data frame sequence: judging whether the non-valid data of the current data frame are the same as the non-valid data of the previous data frame; and acquiring and storing the data difference between the current data frame and the previous data frame if yes; and directly storing the current data frame if no. According to the method and the device, the CPU resources can be effectively saved, the method is simple, and the compression efficiency is improved when the compression speed is increased.

The invention relates to compression equipment, in particular to high-efficiency compression equipment for hardware waste, and aims to provide the high-efficiency compression equipment which is used for the hardware waste and is convenient to use, thorough and rapid in compression and good in use effect. The equipment comprises a fixed frame, moving frames, rollers, discs, a third connecting rod, compression blocks, a guide rail, first gears, racks, second rotating shafts, first bearing blocks, a first motor and the like; the first bearing block and a compression tank body are sequentially arranged on the upper side of the lower part of the fixed frame from left to right; and the first bearing block and an input tank body are sequentially arranged on the lower side of the upper part of the fixed frame from left to right. The equipment realizes the effects of being convenient to use, thorough and rapid in compression and good in use effect, a lot of waste hardware equipment can be compressed rapidly by the aid of the equipment, and the equipment is convenient to use.

The invention discloses a video compression method and device. The method comprises the following steps: carrying out slicing processing on a video file to obtain video slices; distributing the video slices to a plurality of processors, and compressing the distributed video slices by the plurality of processors; and recombining the compressed video slices. By adopting the video compression method and device, the advantages of parallel distributed calculation of the plurality of processors are fully used, the computing power of each processor is fully used, the compression speed is fast, and the efficiency is high.