46 results about "Change density" patented technology

An APD Device provides a pressure differential in a wellbore to control dynamic pressure loss while drilling fluid is continuously circulated in the wellbore. A continuous circulation system circulates fluid both during drilling of the wellbore and when the drilling is stopped. Operating the APD Device allows wellbore pressure control during continuous circulation without substantially changing density of the fluid. The APD Device can maintain wellbore pressure below the combined pressure caused by weight of the fluid and pressure losses created due to circulation of the fluid in the wellbore, maintain the wellbore at or near a balanced pressure condition, maintain the wellbore at an underbalanced condition, reduce the swab effect in the wellbore, and/or reduce the surge effect in the wellbore. A flow restriction device that creates a backpressure in the wellbore annulus provides surface control of wellbore pressure.

The invention, which belongs to the sounding apparatus technology field, relates to a flexible and transparent thermotropic sounding apparatus. The apparatus comprises a sound element and a signal input device connected with the sound element. The sound element includes a flexible and transparent substrate; and at least one conductive film structure and a pair of electrodes or multi-pair electrodes are arranged on the substrate, wherein one ends of the pair of electrodes or the multi-pair electrodes are connected at two sides of the conductive film structure. And an input terminal of the signal input device is connected with the other ends of the electrodes. Therefore, the conductive film structure changes density of surrounding mediums to emit sound waves. According to the invention, there is no mechanical oscillation on the sound element itself and the sound element is transparent and can be bent and stretched. The thermotropic sounding apparatus can generate high sound pressure output within a frequency range of from 101 kHz to 100 MHz as well as has advantages of high reliability, flexibility, transparency, low cost, and high performance; besides, the apparatus can be integrated with a display screen and simultaneously enables sounding and display functions to be realized. Therefore, the provided apparatus can be widely applied to electronic fields like a mobile phone, a MP3, a MP4, a television, a computer, ultrasonic imaging, and a range finding system and the like.

The invention relates to a main component of large wind power generation equipment, in particular to a sound insulation and noise reduction type cabin cover of a wind power generator, comprising a decorative protecting surface layer, an FRP outer plate, a sandwich layer, an FRP inner plate, a hard foam plastic inner core, foam plastics with gradually changed density, a foam plastic skinning layerand a reinforcing frame, wherein the FRP outer plate, the sandwich layer, the FRP inner plate and the reinforcing frame form an integral frame by continuous formation, and the FRP outer plate, the sandwich layer, the FRP inner plate, the foam plastics with gradually changed density and the reinforcing frame form an integral structure. The invention provides the cabin cover of the wind power generator, which has good sound insulation and noise reduction functions, and heat insulation or temperature keeping and flame retardant performance and is suitable for high temperature and cold areas.

An energy producing device, for example a submersible vehicle for descending or ascending to different depths within water or ocean, is disclosed. The vehicle comprises a temperature-responsive material to which a hydraulic fluid is associated. A pressurized storage compartment stores the fluid as soon as the temperature-responsive material changes density. The storage compartment is connected with a hydraulic motor, and a valve allows fluid passage from the storage compartment to the hydraulic motor. An energy storage component, e.g. a battery, is connected with the hydraulic motor and is charged by the hydraulic motor when the hydraulic fluid passes through the hydraulic motor. Upon passage in the hydraulic motor, the fluid is stored in a further storage compartment and is then sent back to the area of the temperature-responsive material.

An image processing apparatus includes a major color range detector detecting the major color range from the image data; a criteria density setting unit determining a density value where the largest number of pixels exists in a density histogram of the major color range as a criteria density; a first correction value derivation unit deriving a first correction value to change density values in a predetermined range higher than the criteria density to be closer to the criteria density; a second correction value derivation unit deriving a second correction value to change density values in a predetermined range lower than the criteria density to be closer to the criteria density; a correction table derivation unit deriving a gradation correction table based on the first correction value and the second correction value; and a correcting unit correcting density of the scanned image data based on the gradation correction table.

The invention relates to an electric vibration test table vaporize cooling system, wherein it uses fluorocarbon whose boiling point is 50-60Deg. C as cooling medium; uses exciting coil and driving coil cooling channel to be filled into the exciting coil and driving coil of electric vibration table; via boiling medium, absorbs the hidden heat to cool the electric vibration table; the cooling medium is heated and vaporized at the exciting and driving coils to be condensed by heat exchanger (condenser) without compression; uses the secondary cooling water to emit the heat in normal temperature; the boiled medium will change density, to utilize the changes of absorbed heat and medium density to generate pressure difference, to form self-circulated power; therefore, the invention can avoid additional power, to circulate the medium in cooling system, to realize self-circulated vaporization cooling. The invention has high efficiency and high reliability.

The invention discloses a tube curtain-wet type gradually-changed-density fiber grid composite dust remover for a development machine, and belongs to the technical field of dust removers. The tube curtain-wet type gradually-changed-density fiber grid composite dust remover comprises a box body, wherein a tube curtain, a gradually-changed-density fiber grid and a maze are arranged in the box body, wherein a spray pipe provided with a water-fog spray head is arranged between the tube curtain and the gradually-changed-density fiber grid; the other end of the gradually-changed-density fiber grid is connected with one end of the maze, and the other end of the maze is connected with a blower through a reducing pipe; a dry ash bin, a sludge bin of the gradually-changed-density fiber grid, a sludge bin of the maze and a circulating water tank are arranged at the lower end of the box body; the dry ash bin is connected with the bottom of the tube curtain; the sludge bins are connected with the bottom of the gradually-changed-density fiber grid; a filter is arranged in the circulating water tank; the circulating water tank is connected with the spray pipe through a water pump; and the density of each layer of fence-shaped textile of the gradually-changed-density fiber grid is gradually changed from sparseness to compactness.

When both of a trapping and a resolution converting process are executed, a deterioration in picture quality occurs. In order to solve this problem, an image forming apparatus is provided which performs a trapping process to expand outlines of objects whose boundaries are in contact with each other, performs a resolution conversion process to change density of edges of an image, and restricts processing so that the trapping process and the resolution conversion process are not executed to a same pixel.

A packaging device has a core that is connected to a sheet of material by a flowable material that sets or cures to harden, such as a two part expandable polyurethane foam. The sheet of material has a plurality of cells that the flowable material enters from a partition that forms the core through an aperture or apertures formed in the sheet of material. The chemistry of the flowable material may be altered to change density, rigidity and flexibility as required by package stresses. The flowable material is effective at creating a durable attachment of the core and sheet of material for forming packaging materials such as reels.

The multilayer composite Al-W material with gradient density consists of N layers in densities of 12.0-13.9 g/cu cm, 10.0-12.0g/cu cm, 8.0-10.0g/ cu cm, 5.5-8.0g/ cu cm ... 2.9-5.5g/ cu cm separately. It is prepared through spraying of mixture powder in different W contents, and the spraying process has no oxidation of Al and W, no generation of other phase, and controllability of the composite material density and thickness.

The invention belongs to the optical detection and optical information processing technology field and aims to acquire the direction and a density value of a large-change density electronic speckle interference fringe pattern. The method comprises steps that step 1, a large-change electronic speckle interference measurement ESPI fringe pattern f is inputted; step 2, a variation image decomposition BL-Hilbert model is utilized to divide the large-change ESPI fringe pattern f into two ESPI fringe patterns with uniformly-distributed densities; step 3, fringe directions and densities of a low-density ESPI fringe pattern u and a high-density ESPI fringe pattern v are respectively calculated; and step 4, the fringe direction and the density of the integral pattern can be acquired through comprehensively selecting the fringe directions and the densities of the low-density ESPI fringe pattern u and the high-density ESPI fringe pattern v. The method is mainly applicable to optical detection and optical information processing occasions.

The invention provides an ultrasonic velvet making method of a solar cell slice. A mixed solution of sodium hydroxide and isopropyl alcohol is put in a cleaning barrel of an ultrasonic cleaning machine; a group of silicon slices are put in the solution; and the ultrasonic cleaning machine is started to make velvets. The ultrasonic velvet making method of a solar cell slice utilizes the high-frequency mechanical vibration of the ultrasonic cleaning machine, and then the high-frequency mechanical vibration is transmitted to liquid trough a vibration plate. The energy of ultrasonic waves in the solution is forwards radiated with regularly-changed densities so as to continuously impact attachments on the surface of an object to ensure that bubbles are quickly stripped off, thus the sodium hydroxide solution can better corrode the surfaces of the silicon slices, thereby greatly improving the making effect of a velvet surface.

In a method of and a system for predicting print colors, a profile generator corrects the standard spectral reflectances of a color chart printed under standard density conditions and the differences between the spectral reflectances of color charts for the respective colors in which the density of one of the colors C, M, Y, K is changed to a changed density setting value and the densities of the other colors are fixed to standard density setting values, using density differences with the standard density setting values which are calculated by a monochromatic solid density calculator. The profile generator then generates a print predicting profile for desired target densities based on the corrected corrective standard spectral reflectances and the spectral reflectance differences, and highly accurately predicts the colors of a print using the print predicting profile when the densities of desired ones of the colors are changed.

The invention relates to a large-size ultrathin metal matrix density gradient material, and a preparation method and application thereof. A designed product has an area with the gradient density and/or an area with the continuous changing density. The thickness of the designed product is less than or equal to 3 mm, the size of at least one dimension of the other two dimensions exceeds 50 mm. The forming method comprises the steps of prepressing raw material powder containing the maximum pore-foaming agent first to obtain a first preformed compact; laying set powder on the first preformed compact and then conducts prepressing to obtain a second preformed compact; repeating the steps until prepressing is completed, and conducting sintering and pore-foaming agent removal treatment to obtain afinished product. When an aluminum base serves as a matrix, the density of a sample is in gradient distribution within 1.3-2.7 g/cm3, and the number of gradient layers can be 10 at most on the premise of the total thickness not exceeding 2 mm. The metal matrix density gradient material prepared through the method has excellent properties and can be extensively applied to the fields of aerospace and national defense and military industry.

The invention relates to an improved method for epothilone B extraction and purification, and belongs to the technical field of biological separation. According to the method, most of impurities are removed by a low-temperature refrigeration method, solid-liquid separation is achieved by changing density, the purity of finished products is further improved by a two-time crystal method, rate-limiting steps such as silica-gel column chromatography are decreased, an epothilone B extraction process is simplified, operation cost is reduced, and the method has a wider application prospect.

A method and a system for predicting print colors are provided. A profile generator determines standard density spectral reflectances of a color chart printed under standard density conditions, first changed density spectral reflectances of a color chart printed with only the density of one of colors C, M, Y, K being changed by a given amount, and second changed density spectral reflectances of a color chart printed with the densities of the colors C, M, Y, K being changed by the same amount. The profile generator generates a print predicting profile for obtaining desired target densities, using the standard density spectral reflectances, the differences between the standard density spectral reflectances and the first changed density spectral reflectances, and corrective coefficients for obtaining the second changed density spectral reflectances, and predicts highly accurately colors of the print where the density of a desired color is changed, using the print predicting profile.

The invention belongs to the optical detection and optical information processing technology field, and relates to a large change density fringe pattern filtering method based on generalized total variation. A new variation image decomposition model is provided, and is used in optical fringe pattern processing, and then a thick fringe part and a thin fringe part are separately processed, and in addition, the smoothness of the thick fringe part is guaranteed, and at the same time, the thin fringe part is not dimmed, and therefore a good large change density fringe filtering effect is provided. By adopting the technical scheme provided by the invention, the large change density fringe pattern filtering method based on the generalized total variation is characterized in that a second-order generalized total variation is used to describe the low density part, and Hilbert space is used to describe the high density fringe, and simple L2 space is used to describe a noise part, and then by optimizing a functional formula, every component u,v,w is finally acquired. The large change density fringe pattern filtering method is mainly used for optical detection and optical information processing occasions.

A self-aligning permanent magnet magnetic bearing comprises an inner ring, an outer ring, a plurality of elongated tile-shaped or rectangular permanent magnets, bearing balls, drive bars and drive rollers, wherein magnetic lines of force of the permanent magnets in sequential arrangement and a radial line of the bearing form small angles, the permanent magnets are mounted in interlayers of the inner ring and the outer ring, the bearing balls capable of rotating and moving radially are arranged between the inner ring and the outer ring, and the drive bars and the drive rollers push the inner ring or outer ring permanent magnets to rotate by certain small angles when the bearing balls move. The self-aligning permanent magnet magnetic bearing is characterized in that like poles of the bearing inner ring permanent magnets are opposite to those of the bearing outer ring permanent magnets, the included angles between the bearing inner ring or outer ring permanent magnets and the radial lineare different, a rotary bearing shaft is arranged at the center of inside of the inner ring permanent magnets, another rotary bearing shaft is arranged at the center of outside of the outer ring permanent magnets, and the permanent magnets can rotate around the rotary bearing shafts to adjust the included angles between the magnetic lines of force of the permanent magnets and the radial line so as to change density of the magnetic lines force in the radial direction, so that magnetic repulsive force of the magnets is changed.