30results about How to "Large compression space" patented technology

The invention relates to a real-time lossless compression method for an image. The method comprises the following steps: setting the length of a predictor according to the specification of an input initial image; predicting by using a JPEG-LS (Information T) predictor according to the input image, and carrying out subtraction on the actual value and the predicted value to obtain a residual which can be mapped to a nonnegative integer and a preprocessing result of the input image; dividing and accumulating according to the different values of division mode k and the preprocessing result of the input image, and calculating a total code length when k is equal to 0, 1, 2,..., n-3, marking a k value which corresponds to the minimum value of the code length as a k<*>, wherein n is a bit wide when the pixel value of the imported image is converted to a binary system; dividing a sample of the whole image according to the k<*> to obtain a compressed code steam for storing or transmitting. For a gray image with poor continuous color tonality, particularly a spaceborne remote sensing image, the invention can effectively reduce the space redundancy of the whole image and decrease the average value of the sample; and meanwhile, any information cannot be lost during the whole coding process and a lossless compression can be realized.

Scroll compressor including wraps of involute curves on opposite surfaces of an orbiting scroll and a fixed scroll engaged to each other, to form a compression chamber as the orbiting scroll orbits with respect to the fixed scroll, wherein each of the wraps on opposite surfaces of the orbiting scroll and the fixed scroll is formed from two or more than involute curves each having a base circle and a point of starting different from each other, thereby permitting to secure a larger compression space for a same sized scroll compressor while a reliability of the scroll compressor is not made poor, to reduce a centrifugal force and noise occurred at the orbiting scroll, and improving a stability of the orbiting scroll.

The present invention relates to flyer technology, and is especially one kind of flyer with air compressor as driving mechanism. The technological scheme is that the flyer includes mainly floating board and main body. The floating board is fixed onto the main shaft, the main shaft passes through the compressing cylinder inside the main body and extends beyond the main body, and the piston of the cylinder is fixed onto the main shaft. The main body is provided with several air compressors with different compression amount and communicated each other, engine to drive the air compressors, compressed air storage and air jet communicated to the compressed air storage. The present invention is powered by compressed air, rather than aviation fuel oil, and has greatly lowered weight and no hidden safety trouble of carrying great amount aviation fuel oil.

The invention belongs to the technical field of household bathing equipment, and particularly relates to an auxiliary standing seat for a bathroom for old people. The auxiliary standing seat comprisesa mounting plate, a seat part, a buffer guide part and an auxiliary lifting part; the seat part is mounted on the mounting plate through the buffer guide part; the buffer guide part comprises a guiderod, a mounting base and a buffer element; the buffer element is used for buffering the seat plate; the auxiliary lifting part is arranged on the mounting plate; the auxiliary lifting part is used for assisting the lifting of the seat part by other external forces; the auxiliary lifting component comprises a lifting ring, a first pull rope, a first fixed pulley, a second fixed pulley and a pedalrod. Compared with a mode of directly supporting the arms of old people manually, the mode of assisting the old people to stand up through supporting is more labor-saving, the lumbar vertebrae and thearms of the old people can be better protected, and the safety of the old people in the showering process is further improved.

The invention relates to an elastic device which comprises an elastic body. The elastic body is formed by curling and stacking a metal wire. The cross section of the metal wire is almost shaped like a regular polygon. A strengthened layer is arranged on the outer surface of the elastic body. Compared with a spring with the turns and the length identical to those of the elastic device and a circular spring with the cross sectional area identical to that of the elastic device, in other words, compared with the spring with the elastic force equal to that of the elastic device, the gaps between the turns of a spring are larger, the compression space of the spring is larger, and the compression effect is better; through the arrangement of the strengthened layer, the fatigue strength of the spring is remarkably improved, the fatigue life of the spring is prolonged more than one time, the corrosion resistance of the spring is improved, and the cost of the high-strength spring is effectively reduced.

The invention discloses an anti-extrusion signal cable comprising a cable core, an internal protection layer, a shielding layer, an intermediate protection layer, a reinforcing layer, a protection layer and an external protection layer. The cable core comprises an insulator and multiple wire cores. The internal part of the insulator is provided with multiple first through holes and multiple second through holes along an axial direction. Each first through hole is surrounded by 3-6 second through holes. The multiple wire cores are respectively arranged in the multiple first through holes. Each wire core comprises a conductor, a polyester tape which wraps the conductor and a copper wire braiding layer which wraps the polyester tape. The internal part of the internal protection layer is provided with multiple third through holes along the axial direction. The internal part of the intermediate protection layer is provided with multiple fourth through holes along the axial direction. The signal cable has the properties of being waterproof and moisture-proof, flame-retardant and fireproof, anti-interference and anti-extrusion.

The invention provides a high-milling type mill disk which is composed of a fixed mill disk and a movable mill disk of which the disk surfaces are matched with each other, wherein the disk surfaces of the two mill disks are correspondingly provided with a separation mill region, a dispersion mill region and a fine mill region from inside to outside; the dispersion mill region is a multi-concentric-toothed-ring arrangement region in which the two mill disks mesh with each other; and each toothed ring is evenly provided with a plurality of material channels. The invention also provides a high-milling type impregnating disk mill using the high-milling type mill disk. By using the technical scheme, pulp fiber bundles, including thin fiber bundles, can be dispersed and refined in a better way, thereby completely adapting to milling operation of various high / medium-concentration (10-35%) materials; the fiber abrasion is small; and the technical scheme provides a large compression space for shortening the composition of a mechanical pulp / chemimechanical pulp making system.

The invention relates to the technical field of forklift production and particularly relates to a battery pack for an electric forklift. The battery pack comprises a chassis and a heat dissipating mechanism. The heat dissipating mechanism comprises an air inlet passage, an air outlet passage and a compression assembly arranged in the chassis, and both the air inlet passage and the air outlet passage are arranged in the chassis and communicate with the outside. The compression assembly includes a filtering portion and a compression portion, the filtering portion is used for performing dust removal processing on airflow entering through the air inlet passage, the compression portion is used for discharging air in the chassis, the compression portion is in transmission connection with the filtering portion, and the compression portion drives the filtering portion to close the air inlet passage and the air outlet passage is opened at the same time. The compression portion is driven in a directed direction to discharge hot air flow out of the chassis in an active heat radiation way, the air outside the chassis is sucked into the chassis in the reset process of the compression portion torealize rapid airflow conversion before and after a storage battery is loaded, and the problem of low dissipation efficiency of the storage battery in a loaded state in the prior art is solved.

The invention discloses a tunnel lining structure filled with ceramsite and a construction method, which includes surrounding rock, primary support is anchored on the tunnel rock mass of the surrounding rock through bolts, and the inner layer of the primary support is A waterproof layer is laid, a ceramsite filler is laid on the inner layer of the waterproof layer, a steel arch is set inside the ceramsite filler, and a secondary lining is poured inside the steel arch. Using this technology can give full play to the bearing capacity of the supporting material itself, greatly improve the utilization rate of the steel arch, reduce the amount and strength requirements of the steel arch, use ceramsite fillers to protect the steel arch to the greatest extent, and effectively control the surrounding rock Deformation, protection and reinforcement of surrounding rock, saving resources and realizing green economy.

The invention relates to the technical field of forklift production and particularly relates to a battery pack for an electric forklift. The battery pack comprises a chassis and a heat dissipating mechanism. The heat dissipating mechanism comprises an air inlet passage, an air outlet passage and a compression assembly arranged in the chassis, and both the air inlet passage and the air outlet passage are arranged in the chassis and communicate with the outside. The compression assembly includes a filtering portion and a compression portion, the filtering portion is used for performing dust removal processing on airflow entering through the air inlet passage, the compression portion is used for discharging air in the chassis, the compression portion is in transmission connection with the filtering portion, and the compression portion drives the filtering portion to close the air inlet passage and the air outlet passage is opened at the same time. The compression portion is driven in a directed direction to discharge hot air flow out of the chassis in an active heat radiation way, the air outside the chassis is sucked into the chassis in the reset process of the compression portion torealize rapid airflow conversion before and after a storage battery is loaded, and the problem of low dissipation efficiency of the storage battery in a loaded state in the prior art is solved.

The invention discloses a forming mold for preparing a blind pipe of a thick-bottomed outer light metal powder filter element, which comprises an outer mold and an inner mold coaxially arranged, the gap between the inner mold and the outer mold can accommodate the filter core, and the inner mold is composed of The support tube positioned by the outer mold and the inner rubber sleeve set on the outer surface of the support tube; the support tube is a blind tube, and the blind end is tapered or hemispherical tapering shape, opening at 45 degrees at the end There is an annular groove, and the inner rubber sleeve is embedded in the groove; the pipe wall of the support pipe is evenly opened, and the bottom of the groove is symmetrically opened with a plurality of small holes along the circumference. The forming mold for preparing the blind tube of the thick-bottomed external light metal powder filter element provided by the present invention ensures the quality during the forming process of the thick-bottom external light metal powder filter core dead tube. The rubber sleeve is broken, the tube blank is damaged, etc., which simplifies the production process, eliminates the problem of external mold deformation, and reduces the production cost.

The invention discloses the application of PDES in a compression-resistant self-repairing three-dimensional sensor, the three-dimensional sensor and its preparation method and application. The PDES described in the invention selects acrylamide, choline chloride, and maleic acid as constituent monomers. These monomers can be copolymerized under the excitation of ultraviolet light in a photocurable 3D printer to form a dense conductive polymer network structure, which can be used to prepare a super-compression-resistant self-healing three-dimensional sensor based on 3D printing. The compression-resistant self-repairing three-dimensional sensor prepared by the present invention has a high ultraviolet transparency effect, excellent distortion effect, stretching effect and compression effect under the action of external force, and also has stable mechanical compression performance and electrical signal transmission performance and excellent The self-healing function and electrical conductivity have a wide range of application values ​​in the fields of unmanned driving and intelligent detection.

A control device for a variable valve exhaust pipe, sleeved with a spring (81) between a mounting base (6) and a main support piece (4); the spring is located in a sleeve pipe (52) and extends into a mounting base sleeve pipe (62); both the sleeve pipe and the mounting base sleeve pipe are respectively provided with a magnet (82, 83) on the outer side; a fixing spring (91) is disposed between the magnet and an auxiliary support piece (5) or a mounting base casing (61), such that relatively high-temperature exhaust can be treated; the magnet and the mounting base casing are also provided with a magnetic coil (88) therebetween. On one hand, the length and compression space of the spring are increased, thus improving the adjustable exhaust range of the control device; on the other hand, by means of adding the magnetic coil, the magnetism magnitude of the magnet can be adjusted at any time, thus greatly improving the controllability of the device, therefore not only achieving an automatic maintenance effect and preventing the locking between a hollow shaft and an inner hollow pipe, but also increasing the magnetism of the magnet when the displacement needs to be increased abruptly during such situations as emergency acceleration, thus controlling the spring to quickly compress and open a piston plate to exhaust the gas.

The invention belongs to the technical field of household bathing equipment, in particular to an auxiliary standing seat for an elderly bathroom, comprising a mounting plate, a seat part, a buffer guide part and an auxiliary lifting part; the seat part passes through the buffer guide The components are installed on the mounting plate; the buffer guide component includes a guide rod, a mounting seat and a buffer element; the buffer element is used to buffer the seat board; the auxiliary lifting component is arranged on the mounting plate above; the auxiliary lifting parts are used for the lifting of other external force auxiliary seat parts; the auxiliary lifting parts include suspension rings, No. 1 pull rope, No. 1 fixed pulley, No. 2 fixed pulley and stepping rod; The form of assisting the elderly to stand up is not only more labor-saving than the form of directly supporting the elderly's arms manually, but also more conducive to protecting the lumbar spine and arms of the elderly, and further improving the safety of the elderly in the process of showering.

The invention relates to a real-time lossless compression method for an image. The method comprises the following steps: setting the length of a predictor according to the specification of an input initial image; predicting by using a JPEG-LS (Information T) predictor according to the input image, and carrying out subtraction on the actual value and the predicted value to obtain a residual which can be mapped to a nonnegative integer and a preprocessing result of the input image; dividing and accumulating according to the different values of division mode k and the preprocessing result of the input image, and calculating a total code length when k is equal to 0, 1, 2,..., n-3, marking a k value which corresponds to the minimum value of the code length as a k<*>, wherein n is a bit wide when the pixel value of the imported image is converted to a binary system; dividing a sample of the whole image according to the k<*> to obtain a compressed code steam for storing or transmitting. For a gray image with poor continuous color tonality, particularly a spaceborne remote sensing image, the invention can effectively reduce the space redundancy of the whole image and decrease the average value of the sample; and meanwhile, any information cannot be lost during the whole coding process and a lossless compression can be realized.

The invention discloses a waterproof structure of embedding a hollow elastic pipe in a cement concrete pavement joint. The waterproof structure of embedding the hollow elastic pipe in the cement concrete pavement joint comprises a hollow elastic pipe, which is embedded in the joint and can horizontally retract with expansion and retraction of a pavement slab; the elastic pipe is at least provided with an arched convex part upwards under an extruding effect of the pavement slab; the surface, right against the joint, of the hollow elastic pipe is provided with an open joint, whose interior and exterior are communicated with each other. As the pre-compressed magnitude of a hollow elastic waterproof piece is large and the stretching and compressing spaces of the hollow elastic waterproof piece are large, the hollow elastic waterproof piece can adapt to deformations, in particular horizontal telescopic deformation and vertical shearing deformation, of a concrete slab for a long time; and as the compression degree of the hollow elastic waterproof piece is suitable for the hollow elastic waterproof piece to expand and retract, when the width of transverse joint is changed with the temperature, the elastic waterproof piece cannot be separated from the transverse joint to cause damage at the connecting part of the transverse joint and the elastic waterproof piece through reducing interface stresses of telescopic and shearing deformations of the transverse joint under situations of the telescopic deformation and the shearing deformation of the transverse joint.

The invention relates to a tunnel lining structure with detachable lining tires and a construction and installation method thereof. The tunnel lining structure includes lining tires, a pressure dynamometer, an alarm device, a strain gauge, a "U"-shaped expansion bolt and the like. The invention solves the problem that during the construction process, the surrounding rock deforms without increasing the internal force of the steel arch, and there is always a supporting force in the surrounding rock, so that the surrounding rock will not be partially damaged, and at the same time, it can ensure that the steel arch will not produce a large amount of damage when it is damaged. The problem of large internal stress. The invention is suitable for tunnels of various shapes, which can fully exert the self-supporting force of the surrounding rock, ensure that the overall force of the steel arch frame is uniform, prevent the surrounding rock from being suddenly damaged during the construction process, and improve safety. The steel arch can be removed in the later stage of construction. The arch frame greatly saves the cost of tunnel construction.

The invention discloses a signal cable, which comprises a cable core, an inner protection layer, a shielding layer, a middle protection layer, a reinforced layer, a protective layer and an outer protection layer, wherein the cable core comprises an insulator and a plurality of wire cores; a plurality of first through holes are formed in the insulator along the axial direction; a plurality of ridges are arranged on the surface of the insulator along the axial direction; the plurality of wire cores are placed into the plurality of first through holes respectively; each wire core comprises a conductor, a polyester tape and a copper wire braid layer; the polyester tape coats the conductor; the copper wire braid layer coats the polyester tape; and a plurality of second through holes are formed in the middle protection layer along the axial direction. The signal cable disclosed by the invention has excellent waterproof and damp-proof properties, flame-retardant fireproof properties, anti-interference performance and compression resistance.