35results about How to "Increase the compression factor" patented technology

The invention provides an aluminum or aluminum alloy conductor twisting and compressing process for cables. The aluminum or aluminum alloy conductor twisting and compressing process comprises the following steps of: twisting aluminum or aluminum alloy single wires along the traction direction of the aluminum or aluminum alloy single wires; and compressing the twisted aluminum or aluminum alloy single wires by a compression roller, wherein a layer of twisting layer is formed after the aluminum or aluminum alloy single wires are twisted once and compressed by means of the compression roller, the subsequent twisting layer is twisted on the basis of the fore twisting layer, and the twisting direction of the last twisting layer is the same as that of the second last twisting layer. According to the aluminum or aluminum alloy conductor twisting and compressing process, the twisting directions of the outermost two layers of twisting layers are the same, the compression roller is combined with a nano diamond composite coating compression die, the phenomena of surface burrs of compressed round aluminum conductors, more aluminum scraps and wire fracture are prevented, the influence of alcohol which is continuously dripped for lubricating and cooling on the residual water inside or on the surface of the conductors is eliminated, the volume resistivity of the twisted and compressed cables is reduced by 0.5 to 2.0 percent, the production cost is saved, and the social benefit is higher.

The invention discloses a method for deep convolutional neural network model compression. The method comprises the steps that a trained deep convolutional neural network model is retrained to remove redundant network connections; weights of remaining connections of various network layers of a convolutional neural network are coded; the weights of the remaining connections of the various network layers of the convolutional neural network are subjected to k-means clustering; clustering results are subjected to fine tuning; and results after fine tuning are saved, and a saved file is subjected toHuffman coding. According to the method, by setting a dynamic threshold, the connections in the network can be gently removed to enable the network to be recovered from the unfavorable condition thatthe connections are removed, and therefore the effect that the compression multiples is high under the condition of the same accuracy rate loss can be achieved; and in the coding process of the remaining connections, the bit number needed for representing an index value can be decreased by means of the used improved CSR coding method, therefore, the size of the compressed file can be decreased, and the compression ratio is increased.

An exemplary method for intelligent compression uses a foveated-compression approach. First, the location of a fixation point within an image frame is determined. Next, the image frame is sectored into two or more sectors such that one of the two or more sectors is designated as a fixation sector and the remaining sectors are designated as foveation sectors. A sector may be defined by one or more tiles within the image frame. The fixation sector includes the particular tile that contains the fixation point and is compressed according to a lossless compression algorithm. The foveation sectors are compressed according to lossy compression algorithms. As the locations of foveation sectors increase in angular distance from the location of the fixation sector, a compression factor may be increased.

The invention provides a method for guiding video coding by utilizing a semantic segmentation result. Firstly, on the basis of an image semantic segmentation result, inter-frame optical flow estimation is combined, semantic segmentation of a video flow sequence is achieved in a mode that a plurality of flow propagation gating circulation units are connected in series, and the precision and speed of video semantic segmentation are improved. Furthermore, the video semantic segmentation result is applied to adaptive video coding under the guidance of scene content classification;, the target category and motion characteristics in the video content can be effectively utilized to realize self-adaptive quantization, low-rate compression is carried out on key objects and motion targets, high-ratecompression is carried out on non-key objects, the storage consumption and bandwidth occupation of the video are reduced, and effective reference is provided for video coding compression, especiallyapplication in the monitoring field.

The invention discloses a water tight cable for a beach, which comprises a cable core positioned in the middle of the cable, the cable core is formed by hinging a plurality of wire cores, and each wire core is composed of a conductor and a conductor screen layer, an insulating layer, an insulating screen layer, a semi-conductive belting layer and a metal screen layer arranged outside the conductor in sequence; a packing layer is arranged between the cable cores, and a belting layer, a metal armor layer, a water proof inner protecting sleeve and a water proof outer protecting sleeve are arranged outside the cable core in sequence. The cable adopting the structure provided by the invention is provided with better water blocking performance, better corrosion resisting performance, and higher safety performance, and the cable is used for power transporting line in beach area.

The invention discloses a tensile aluminum stranded wire for electric power transmission. The tensile aluminum stranded wire comprises a center stressed unit, a first aluminum alloy conducting layer and a second aluminum alloy conducting layer, wherein the first aluminum alloy conducting layer and the second aluminum alloy conducting layer are sequentially stranded on the outer surface of the stressed unit; an aluminum conductor wrapping layer is formed by stranding 19-21 Z-shaped aluminum alloy conductors with Z-shaped sections; the stressed unit comprises a first carbon fiber single wire located at the center and six second carbon fiber single wires stranded on the outer surface of the first carbon fiber single wire; the first carbon fiber single wire and each second carbon fiber single wire are each formed by stranding a plurality of carbon fiber precursors; a polyester adhesive filling part is formed by mixing a first component and a second component, and the first component is composed of, by weight, N-307 unsaturated polyester, butyl acrylate, 2-ethylhexyl acrylate, n-butyl alcohol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine. It is guaranteed that the carbon fiber precursors in the aluminum layers are round and normal, damage of the aluminum layers in subsequent use is avoided, reliability of electrical property is guaranteed, and the bending radius is lowered to be six times the diameter of a cable.

The invention relates to an A-class fire-retardant water-proof rat-proof ant-proof intermediate-voltage special cable for the rail traffic. The cable comprises a conductor; a conductor shielding layer, an insulation layer, an insulation shielding layer, a wrapping layer, a metal shielding layer, a water blocking layer, a flame-retardant layer, an inner sheath, a metal armored layer, and an outer sheath are arranged successively outside the conductor, wherein the conductor shielding layer, the insulation layer, and the insulation shielding layer re in a three-layer co-extruded manner. The innersheath is an extruded halogen-free low-smoke flame-retardant oxygen barrier layer formed by wrapping of two alkali-free glass tapes. The outer sheath is formed by extruding an optical cement by a low-smoke halogen-free fire-retardant rat-proof ant-proof high-polymer material; and the optical cement has the thickness of 10 to 20 microns. The outer sheath is a polyvinyl chloride outer sheath; and awhite-ant-proof plant additive that is non-toxic and is harmless to the human body and the environment is added into the outer sheath. The cable has characteristics of excellent environmental protection effect and good low-smoke, halogen-free, flame-retardant, waterproof, anti-ultraviolet radiation, rat-proof, and ant-proof performances and the like.

The invention relates to a novel fireproof cable which comprises a cable core. The cable core is made by twisting a plurality of conductors; each conductor comprises an aluminium alloy conductor; a ceramic low-smoke zero-halogen polyolefin fire-retardant insulating layer is extruded outside each aluminium alloy conductor; a gap of the cable core adopts a zero-halogen low-smoke fire-retardant filling layer; and a ceramic fire-retardant fireproof silicon gel composite tape, a metal fireproof layer and a ceramic low-smoke zero-halogen polyolefin fire-retardant outer protection layer are sequentially lapped outside the cable core. The novel fireproof cable is reasonable in structure and convenient to manufacture, has a good energy-saving effect, excellent fireproof performance, shock resistance and spraying resistance and is environmental-friendly.

The invention relates to a compression method for a deep recurrent neural network based on SVD and pruning. The compression method comprises the steps of S1, performing SVD decomposition on a recurrent neural network needing to be compressed; s2, training the network after SVD decomposition again, and removing redundant connection step by step; s3, respectively performing K-means clustering on theweights of the remaining connections of each layer of the network; s4, training the clustered network again; and S5, encoding and storing the network weight. According to the invention, SVD and redundant network connection removing methods are combined; the number of parameters of the recurrent neural network is effectively reduced, the storage amount of the parameters is greatly reduced throughfurther K-means clustering and encoding storage of a sparse matrix, training of the network is combined in the series of processes, and it is guaranteed that a large compression multiple is achieved under the condition that the influence on the network performance is not large.

A device and method for compressing image data is disclosed. The device and method comprises a block dividing section for dividing each frame of the image data into a plurality of blocks; a block determining section for determining the types of divided blocks; and a compressing section for performing compression according to the types of divided blocks. The block types include motion blocks, static blocks and refresh blocks that avoid the accumulation of errors between frames.

The invention discloses a thermal insulation bottle type B1-level light fireproof cable, which comprises a composite insulation cable core group formed by twisting a plurality of cable cores. Each cable core is formed by twisting a molded line with an aluminum alloy conductor, a mineral insulation layer and a double-insulation irradiation crosslinking composite insulation layer; the whole composite insulated cable core group is wrapped with a first low-smoke halogen-free belt, gaps in the first low-smoke halogen-free belt are filled with inorganic mineral fillers to form a cooling fireproof layer, and a B1-level isolation layer, an armored metal sleeve, a flame-retardant fire-blocking layer, a second low-smoke halogen-free belt and a B1-level sheath are arranged outside the first low-smokehalogen-free belt. The cable provided by the invention has reliable mineral insulated cable fireproof characteristic, B1-level flame retardant property and low-smoke halogen-free environment-friendlycharacteristic.

The invention relates to a fabrication method for round pressing of an aluminum-alloy conductor. A round single wire is pressed by a single-way twisting mode. The fabrication method comprises the following steps of 1) winding the round single wire after an intermediate conductor by the single-way twisting mode, and pressing the conductor by a press die; 2) coating the external part of the pressed conductor with an insulation layer; and 3) sleeving the outer layer of the insulation layer with a PVC jacket. Compared with the prior art, the fabrication method has the advantages of low processing cost, material saving, high pressing coefficient and the like, and is convenient to fabricate.

The invention relates to a power cable, which comprises an outer semiconductive layer, an outer nonmetal protective layer, a metal sheath layer, a semiconductive water-stop buffer layer, an insulated shield layer, an insulated layer, a conductor shield layer and conductors. The conductors are disposed in the innermost center, and the conductor shield layer, the insulated layer, the insulated shield layer, the semiconductive water-stop buffer layer, the metal sheath layer, the outer nonmetal protective layer and the outer semiconductive layer are arranged outside sequentially layer by layer. The conductors include a middle round conductor, and trapezoidal or Z-shaped single conductors mutually matching to surround the round conductor.

In a method of image compression in which vertical and horizontal white skipping are performed, data compression is performed in the regions containing black pixels other than the skipped regions. While vertical and horizontal white skipping being performed, in the other regions, regions are detected in which pixel values change in smooth fashion, such as the outlines of letters and encoding is performed using the pixel value of the leading column of the region, number of columns and amount of change of the pixel values. As a result, the compression factor of the image can be increased and a considerable contribution made to reduce the storage capacity for storage of data and reduce the time required for data transmission.

The invention relates to a novel energy-saving water-blocking cable. The novel energy-saving water-blocking cable comprises a cable core formed by twisting a plurality of insulated wire cores, wherein each insulated wire core consists of a water-blocking conductor and a water-tree-resistant insulating layer extruded outside the corresponding water-blocking conductor; a water-blocking wrapping belt, a metal sheath water-blocking layer and a composite water-blocking sheath layer wraps the outside of the cable core in sequence; and the water-blocking wrapping belt is filled with water-blocking filling yarns. The novel energy-saving water-blocking cable is compact and reasonable in structure and convenient to manufacture, and is good in energy-saving effect, high in water-blocking performance, long in service life and environmentally-friendly.