693 results about "Pre compression" patented technology

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

A pulsed laser comprises an oscillator and amplifier. An attenuator and / or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and / or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

A reservoir configured to retain a volume of liquid for use in an apparatus for humidifying a flow of pressurised air comprises a base portion and a lid portion. The reservoir may be configured to improve its level of thermal contact to the heater plate using the flow of pressurised air. The reservoir may be configured to improve thermal contact between the reservoir and the heater plate by pre-compression upon engagement of the reservoir with the humidifier. The reservoir may comprise a removable intermediate portion, which may include the inlet tube and / or the outlet tube, for improved access for cleaning. The reservoir may also be configured to prevent overfilling. Overfill prevention features in the reservoir may include defined flow egress paths and / or formation of air locks.

A firearm noise suppressor having an internal base frame member with a plurality of inserts mounted thereto. In one form the suppressor is provided with a slip chamber allowing gas to be forwarded to a longitudinally forward chamber for pre-compression of gas therein.

In exemplary embodiments of the present invention, Flair® based aerosol-type devices can be provided. Such devices utilize a combination of Flair® technology, pre-compression valves and aerosol like pressurization of the dispensed liquid. Such a dispensing device has a main body comprising a pressure chamber, the latter being provided with a pressure piston and a pressure spring. The device further has a piston and a piston chamber which draws liquid from a reservoir and fills the pressure chamber with that liquid as a user operates the trigger in various compression and release strokes. The piston chamber has both an inlet valve and an outlet valve. In a dispensing head a valve is provided to regulate the strength of the flow and preclude leakage. Once the liquid is sufficiently pressurized, it can be dispensed by a user opening an activation valve, such as by pressing on an activation button, and spray can be abruptly stopped by a user ceasing to push on such button. Or, for example, in alternate embodiments without an activation button, once the liquid is sufficiently pressurized, continuous spray occurs until the pressure chamber is emptied. By repeatedly pumping the trigger before the pressure chamber is fully emptied, continuous spray can be achieved. By designing the input volume to be amply greater than the volume of the pressure chamber, continuous spray with fewer pumping strokes can be implemented.

The invention aims to provide a manufacturing method of film split polytetrafluoroethylene fibers with high intensity, high uniformity and low production cost. A process comprises the following steps of: mixing polytetrafluoroethylene micro-powder and a lubricant; stirring; standing; performing pre-compression molding; performing press molding; performing calendaring molding; drying; cutting; performing primary hot stretching; performing secondary hot stretching; performing heat shaping; and winding so as to obtain high-intensity polytetrafluoroethylene fibers. In the manufacturing process, temperatures during drying, cutting, primary hot stretching, secondary hot stretching and heat shaping rise in turn.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

A composite structure (3) includes a piezoelectric element (1) sandwiched between fiber composite panels (2). The composite structure can be used as an actuator element. In a method for producing the composite structure, the fiber composite panels are pre-stressed and pre-strained by applying respective pre-stressing forces (F1, F2) in opposite directions along two substantially perpendicular axes in the plane of the panel. The pre-stressed and pre-strained condition of the fiber composite panels (2) is maintained, while the panels are adhesively bonded (5) surfacially onto the piezoelectric element (1). After the bonding is completed, the pre-stressing forces are removed from the fiber composite panels. As a result, in the finished composite structure (3), the fiber composite panels (2) are under internal tension, while the piezoelectric element (1) is under internal compression. The pre-stressing forces (F1, F2) are particularly selected in magnitude and direction to achieve the required resultant balance of tension and compression within the composite structure (3). The pre-compression of the piezoelectric element (1) should be sufficient so that operating loads on the composite structure do not result in tension loading of the piezoceramic element, while substantially maintaining the useful active strain range of the overall composite structure.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

The ultrasound motor is composed of subassemblies of stator, mover and bracket. The stator consists of stepped cylinder, eight pieces of piezoelectric ceramics (PC), pressing block, support and two driving wheels. Electrodes distributed along circumferencial direction evenly are plated on surface of PC. Mover includes slide block and slide bar. The slide bar is contacted to two drive feet of the stator; and the slide bar is fixed on the bracket. The mover is held between bracket and stator. Through supporting effect, springs and nuts on the bracket provide needed pre-compression between stator and mover. Through different fan-shaped electrodes, the drive signal acts on pieces of PC. Under inverse piezo effect, PCs vibrate to excite a natural vibration of stator so as to realize reciprocating rectilinear motion of slide block of mover. Realizing rectilinear motion in two directions of mover, the motor provides features of large output force and speed, and higher efficiency.

The invention relates to a hexapodous biomimetic wet-sucking wall-climbing robot, which belongs to the technical field of bionics. The robot comprises a body framework, biomimetic podites, motors, a driving circuit, a pre-compression structure, a cam structure and a pull rope structure, wherein all the components are installed on the body framework. The body framework comprises a support and a crossbeam which is installed in the groove of the body framework; each biomimetic podite comprises a base seat, a femur, a tibia, a spring steel sheet and a flexible structure, one end of the femur and the flexible structure is connected with the base seat, the other end thereof is connected with the tibia, and the spring steel sheet is installed on the tibia; the driving circuit performs joint control to the motors, the motors are vertically installed in the motor grooves and horizontally installed on the crossbeam; the pre-compression structure comprises a podite support and a T-shaped femur extension support which are connected through a spring; the cam structure comprises a cam and a cam fixing support, one end of the cam is fixed on the motor shafts, and the other end is connected with the cam fixing support; the pull rope structure comprises a pull rope support, pull ropes and brake lines, and the pull ropes are connected with the biomimetic podites through the pull rope support. The hexapodous biomimetic wet-sucking wall-climbing robot has the advantages of simple structure, part modularization and standardization, convenient processing and assembly, hollow structure, light overall weight, multi-motor driving, easy gait planning, and easy realization of stable and reliable operation of the hexapodous wall-climbing robot.

A pulp molding machine, a pulp molding process and a paper-shaped article made thereby are provided. The pulp molding machine comprises a pulp-dredging stage, a first pre-compression forming sub-stage, a second pre-compression stage, a compression thermo-forming stage and an edge-cutting stage. The pulp molding process comprises the steps of a pulp-dredging step, a first pre-compression forming step, a second pre-compression forming step, a compression thermo-forming step and an edge-cutting step. The pulp molding machine the pulp molding process can drain off water or vapor from a wet pulp more efficiently and shorten the cycle time of the pulp molding process due to the extra pre-compression sub-stage. The paper-shaped article made thereby has a greater smoothness and structural strength than conventional paper-shaped product.

Provided is a prestretching-pretwisting type full-bridge 2D electro-hydraulic proportional directional valve. Two ends of the 2D valve are respectively connected with linear electrical machinery converters through pressure-torsion couplings and springs, a spring 4 is mounted between a valve body and a slide wedge, and the pre-compression amount of the spring 4 is slightly larger than the travel of a valve core. A left sensitive cavity and a right sensitive cavity are formed between end portion shoulders and the valve body and between the slide wedge and the valve boy. A pair of high-pressure hole and low-pressure hole (a, b) and a pair of high-pressure hole and low-pressure hole (c, d) are formed in the end portion shoulders respectively, and the high-pressure hole and low-pressure hole (a, b) and the high-pressure hole and low-pressure hole (c, d) are respectively communicated with a port P and a port T through the inner holes of the valve core. A sensing channel c and a sensing channel f are formed in two ends of the wall of the inner hole of the valve body respectively, and are respectively communicated with the left sensitive cavity g and the right sensitive cavity h. The high-pressure holes and the lower-pressure holes of the end portion shoulders cross with the sensing channels to form two tiny opening areas, the two tiny opening areas are connected in series to form hydraulic resistance half bridges, and the pressure of the two end sensitive cavities is respectively controlled by the hydraulic resistance half bridges at two ends.

The invention relates to a full-automatic paper diaper packaging production line which comprises a stacking machine, pre-compression device, a transition mechanism, a secondary compression device, a bag feeding device, a bag opening device, a packaging, sealing and cutting-off device, a pushing mechanism and an offcut collecting device. The pre-compression device comprises a support, a support plate, a left compression mechanism, a right compression mechanism and a push out mechanism, wherein each of the left compression mechanism and the right compression mechanism comprises a compression translation mechanism, an upper push block and a lower push block, the upper push block and the lower push block are respectively connected with the power output end of the compression translation mechanism, and the upper push block is located above the lower push block. The full-automatic paper diaper packaging production line has the advantages that the upper push blocks and the lower push blocks are respectively driven by independent compression translation mechanisms and are fixed in the middle to perform pre-compression, paper diapers are prevented from being deviated and stuck, production smoothness is increased, and production efficiency is increased; the upper push blocks are separated from the lower push blocks, the friction between the paper diapers and the upper push blocks and the lower push blocks is reduced, and abrasion and scratch of the paper diapers are avoided.

The square baler comprises a pick-up a pre-compression chamber, a baling chamber, a loading mechanism for transferring each slice of crop from the pre-compression chamber into the baling chamber and a plunger. The baler further can include at least one non-contact sensor that is provided in at least one of the walls of the pre-compression chamber and / or of the input zone of the baling chamber to produce an output signal indicative of the density of the crop.

A pulsed laser comprises an oscillator and amplifier. An attenuator and / or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and / or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs.

The invention belongs to a prestressed concrete and steel combined tower on which a self-support wind generator set can be assembled and an anchoring method of the prestressed concrete and steel combined tower. The prestressed concrete and steel combined tower comprises a fan foundation and a steel tower cylinder section above the fan foundation and further comprises a prefabricated concrete tower cylinder section and a prefabricated concrete conversion section, and the fan foundation, the prefabricated concrete tower cylinder section, the prefabricated concrete conversion section and the steel tower cylinder section are sequentially connected through prestress anchor sheaves in the sequence from bottom to top. According to the prestressed concrete and steel combined tower on which the self-support wind generator set can be assembled and the anchoring method of the prestressed concrete and steel combined tower, a tower used for the wind generator set is divided into the concrete part and the steel part which are connected through the prefabricated concrete conversion section, and concrete is in a pre-compression state through tensioning of the internal and external prestress anchor sheaves. The concrete tower cylinder section is divided into a plurality of sections according to an actual project and formed by prefabricating and splicing in the sequence of ring pieces-ring sections-segments. The prestressed concrete and steel combined tower has the advantages of being good in quality, low in manufacturing cost, convenient to maintain and the like, the construction method is simple, and the construction speed is high.

A voice coil motor. At least one guide bar is connected to a fixed base. A coil is connected to the fixed base. A support base is movably fit on the guide bar. An annular magnetic member is connected to the support base and surrounded by the coil. A magnetization direction of the annular magnetic member parallels a moving direction of the support base and annular magnetic member. The annular magnetic member includes a first magnetic pole and a second magnetic pole. The first magnetic pole is disposed in the coil and separated from the bottom thereof. The second magnetic pole is disposed outside the coil. The coil interacts with the annular magnetic member to generate a first force, driving the support base and annular magnetic member to move along the magnetization direction of the annular magnetic member.

The invention discloses a system for recognizing rolling guide rail joint surface dynamic characteristic parameters and a control method. The system has a double-guide rail connecting plate symmetric structure; a normal compression device and a tangential compression device are prevented from rigid contact, so that the recognition of normal and tangential dynamic parameters in different pre-compression states is realized; a base consists of an experimental bench and a replaceable adjusting block corresponding to a corresponding rolling guide rail set; the experimental bench is provided with an O-shaped groove or symmetric notch structure; the replaceable adjusting blocks with different specifications are connected with the experimental bench at the same mounting position; each group of replaceable adjusting blocks are symmetrically arranged on the experimental bench, and one side of each of the replaceable adjusting blocks is pressed against a notch machining side face on the experimental bench to ensure parallelism of the replaceable adjusting blocks and position the replaceable adjusting blocks; a multi-guide rail, multi-connecting plate and single degree-of-freedom system design is realized on one experimental bench in different pre-compression states, so that the normal and tangential joint surface parameters are recognized; and the influence on an experimental device is eliminated. The reliable control method and a data processing system ensure that the experimental system is more perfect.

An energy conversion apparatus and method using recovered energy sources including motor vehicle kinetic energy (deceleration and shock) and wind resistance, supplemented by liquefied air transferred to the vehicle and by solar radiation thereto. The energy sources are combined, as available, to drive a compressor for supplying intake working fluid of a motor vehicle prime mover, wherein liquefied air provides pre-compression cooling of an atmospheric air portion of the working fluid. The liquefied air is made by recovered energy, stored and transferred between vehicles and between vehicles and stationary sites. In a hybrid version of the vehicle, exhaust heat from a combustion engine part of the prime mover increases working fluid temperature in a gas expander part, thereof; the engine and expander operating independently or together for improved vehicle propulsion efficiency.

The invention discloses an internal gear pump with low leakage rate, high feeding power, high pressure and energy-saving capability. The internal gear pump comprises a pump body, a front cover, a rear cover, an internal gear, an internal gear shaft, an irregular sheet, a front valve plate, a rear valve plate, a front support, a rear support, and elastic sealing members, wherein the front cover and the rear cover are arranged at two ends of the pump body; the internal gear and the internal gear pump shaft are eccentrically meshed inside the pump body; the irregular sheet is used for dividing a cavity formed by meshing the internal gear and the internal gear shaft in the pump body into two parts; the front valve plate and the rear valve plate as well as the front support and the rear support are respectively and sequentially arranged between the irregular sheet and the front cover as well as between the irregular sheet and the rear cover; the elastic sealing members are respectively arranged between the front cover and the rear cover as well as between the front support and the rear support; a crescent sheet is further arranged on the irregular sheet and is matched with the irregular sheet to divide the cavity in the pump body into two parts; and a spring is arranged between the irregular sheet and the crescent sheet. According to the invention, the pre-compression amount of the elastic sealing members and the pre-pressure of the spring are utilized to fulfill an axial compensation function and a radial compensation function respectively, so that the internal leakage of the entire pump is prevented.

The invention provides a writing-in method of a solid-state memory system flash translation layer (FTL) with a compression function. A solid-state memory system comprises a pre-compression cache, a data compression unit, a post-compression cache, an address mapping table, a data compression FTL and a memory unit. The writing-in method comprises that the solid-state memory system receives and resolves a writing-in instruction; the solid-state memory system caches data to be written in the pre-compression cache; the data compression unit performs data compression of the data in the pre-compression cache and memorizes compressed data in the post-compression cache; the data compression FTL can perform address mapping management, garbage collection, loss balance and the like to compressed data blocks with variable length; and the solid-state memory system writes the compressed data in the post-compression cache in the memory unit. The writing-in method can enable the solid-state memory system to have the built-in compression capacity and the FTL with the compression function, and can improve memory space utilization rate of the solid-state memory system and avoid memory space waste.

The invention discloses a reciprocating seal experiment table for measuring a friction feature of a single seal ring. The experiment table is composed of an experiment cylinder, a high-pressure simulation system, a high-speed drive oil cylinder and a hydraulic system of the experiment table, wherein the high-pressure simulation system and the high-speed drive oil cylinder are connected with the experiment cylinder. A cylinder body of the experiment oil cylinder is installed on a work table through a linear guide rail, the high-speed drive oil cylinder drives the experiment cylinder to reciprocate through a connecting flange, a piston rod of the experiment cylinder is fixed and is divided into two halves, the two halves are connected through a pull pressure sensor and are fixed to the work table. A bushing, used for installation of the seal ring, of the experiment cylinder can be replaced, and therefore seal rings with different pre-compression amounts and different section shapes can be measured conveniently. A high-pressure oil supply system provides a high-pressure working simulation environment inside the experiment cylinder, and the experiment table can adjust the reciprocating speed, strokes and in-cylinder pressure of the drive oil cylinder. The experiment table can measurement the friction feature of the inner stroke and the outer stroke of the single seal ring, the leakage amount and the medium temperature after reciprocating for several times .

The invention discloses a bidirectional self-adaptive damping valve which comprises a valve body, a valve core, a first valve base and a second valve base, wherein the valve core comprises a connecting body, a first valve core and a second valve core; the first valve core comprises a first half valve core, a first sliding piston and a first sensitive spring; the right end of the first half valve core is fixedly connected with the connecting body; the first half valve core is internally provided with a cavity; the left end of the first half valve core is axially provided with a first shaft hole; the first sliding piston is arranged in the cavity, one end of the first sliding piston passes through the first shaft hole at the left end of the first half valve core, and the other end of the first sliding piston is provided with a shaft shoulder for axially positioning; the first sensitive spring is arranged in the cavity, and is positioned between the first sliding piston and the connecting body. According to the invention, through the matched use of the valve core and the spring, the throttling and damping degree of the damping valve changes along with the pressure change at any end of the valve body, and the valve core is at the dynamic balanced state constantly; and through the setting of pre-compression amount of the spring, the pressure sensitivity of the damping valve within different ranges is realized, and the damping valve can adapt to the load pressure changes of all working conditions.