204 results about "Surface velocity" patented technology

This invention relates to apparatus and methods for intermittently bonding a substrate web in fabricating a blank subassembly for an absorbent article. The invention comprises ultrasonic bonding apparatus including an anvil roll, a substrate web thereon, and at least one rotary ultrasonic horn. The substrate web can comprise at least first and second layers of material. The rotary ultrasonic horn, in combination with the anvil roll, ultrasonically bonds intermittent segments of the first and second layers of the substrate web to each other. Such intermittent bonds can comprise end seals for the absorbent articles. The ultrasonic horn and anvil roll are periodically separated from each other to provide the intermittent bonding of the substrate web. An actuator apparatus periodically moves the anvil roll and ultrasonic horn from engaging contact with each other preventing bond formation. The actuator apparatus can include a cam mechanism moving one of the anvil roll and ultrasonic horn from engaging contact with the other during rotation of the rotary ultrasonic horn. The cam mechanism can create a physical gap between the ultrasonic horn and the anvil roll. The cam mechanism moves either the ultrasonic horn and the anvil roll toward the other of the ultrasonic horn and anvil roll at a velocity of no more than about 80 millimeters/second to prevent bounce or impact loading when the horn and anvil roll are in engaging contact. The anvil roll comprises a substrate-receiving surface generally moving the substrate web through the nip at a surface speed of at least 300 meters per minute. The ultrasonic system generally creates bonds between the first and second layers of the substrate web at least about 600 times per minute.

The invention relates to a near-surface modeling method using tomography inversion of a two-step method. The near-surface modeling method specifically comprises the following steps of: (1) picking and inputting short-refraction first-break; (2) carrying out tomography inversion on the short-refraction first-break and outputting explanation results capable of reflecting fine velocity change in an extremely shallow stratum as shown in picture 2; (3) picking a big shot and recording first-break time; (4) interpolating short-refraction inversion results in combination with explanation results of a microlog in a work area by using a kriging method and building near-surface velocity body of the extremely shadow stratum; (5) meshing and constraining inversion initial-velocity modeling, replacing a near-surface velocity body at the extremely shallow stratum obtained in the last step into the shallow stratum part of the initial model generated at the big-shot first-break, replenishing the velocity loss of the extremely shallow stratum resulting from the excessive minimum offset distance of the big shot; (6) constraining generation of a weight field; and (7) inversing the near-surface velocity model by using a constrained chromatography method, picking the top interface of a high-speed layer on the basis of a velocity-depth model obtained by tomography inversion, and calculating static correcting values of a shot point and a geophone position.

An image forming apparatus includes: a transfer-sheet conveying member that rotates to convey a transfer sheet; a first image forming unit that directly transfers a color image onto the transfer sheet; an intermediate transfer member that rotates while an image is transferred thereon; a second image forming unit that transfers images onto the intermediate transfer member; a secondary transfer unit that transfers the images on the intermediate transfer member onto the transfer sheet; a measuring unit that measures a surface velocity of the transfer-sheet conveying member and the intermediate transfer member; and a control unit that performs phase matching control by accelerating or decelerating the transfer-sheet conveying member or the intermediate transfer member so as to match a phase of fluctuation of the measured surface velocity of the transfer-sheet conveying member and a phase of fluctuation of the measured surface velocity of the intermediate transfer member.

The invention belongs to seismic data processing in petroleum geophysical exploration and geological engineering survey, and relates to near-surface velocity modeling and static correction in seismic exploration aiming at research and development of a shallow velocity model required for combined post static correction in a detector chamber of single-point high-density seism. A method for establishing a near-surface velocity model in high-density seismic static correction processing comprises the following steps of: supposing that the near-surface velocity is linearly increased along with the depth, calculating refracted wave velocity of different geophone offset from the travel time difference of primary waves of adjacent detection points of the high-density seism according to the physical property of the primary wave of the near-surface velocity field, establishing a near-surface ramp velocity field parameter according to the relationship between the geophone offset and the refracted wave, and further establishing the near-surface velocity model which can be directly used for static correction quantity calculation in seismic processing and also can be used as an initial model for tomographic inversion of near-surface velocity. The method has high calculation speed, and does not depend on the change of the initial position caused by a seismic focus.

A process for embossing a web substrate is disclosed. The process comprises the steps of: 1. disposing the web substrate in a circumferentially elongate nip formed between a pattern roll having a circumference and an embossing pattern disposed upon a surface thereof and a continuous belt disposed about at least a portion of the circumference of the pattern roll; 2. providing the continuous belt with a surface speed corresponding to a speed of the web substrate; and, 3. juxtaposing the embossing pattern upon the web substrate while the web substrate is disposed within the elongate nip.

An apparatus and method for non-determination of the surface velocity of a target using optical interference and Doppler shifting of the light reflected from the target are disclosed. It may be used to measure small-amplitude, acoustic frequency surface vibrations as well as non-periodic surface vibration.

The invention discloses a prestack depth migration method under a condition of an undulating surface. The prestack depth migration method under the condition of the undulating surface comprises the follows: a step 1 of filling a near-surface velocity between a reference surface and the undulating surface by regarding the highest elevation as a reference surface zbeg=0; a step 2 of adding a corresponding when the wave field zbeg=z=0 into an initial wave field providing that the initial reference surface zbeg=0; a step 3 of dividing the wave field in a range of a single-shot migration aperture into multiple small wave beam windows, converting the multiple wave beam windows to small wave beam regions, and respectively extending a downlink wave field and an uplink wave field to a depth z+deltaz along a depth direction; a step 4 of performing filtration treatnmetn on the extended wave fields; a step 5 of performing cross-correlation imaging by applying the downlink wave field and the uplink wave field based on the cross-correlation imaging condition to obtain an imaging result of the depth layer z+deltaz; a step 6 of judging if a wave field exists in the depth layer z+deltaz, if so, adding a corresponding wave field to the extended wave field to generate an initial extension wave field of the depth layer z+deltaz; and a step 7 of repeating the step 3 to step 6 and gradually extending and imaging until reaching a maximum depth layer zmax so as to obtain an imaging result of the single shot.

The invention provides a method and device for researching a near-surface three-dimensional velocity field of physical geography. The method comprises the steps of obtaining geological information of a research area according to the areal geology of the research area and research content; establishing a three-dimensional geological element conceptual model according to collected data; determining the preliminary survey position of a near-surface survey and a near-surface preliminary survey scheme, carrying out construction according to the determined preliminary survey position of the near-surface survey and the determined near-surface preliminary survey scheme, and obtaining site construction data; adjusting the three-dimensional geological element conceptual model according to the obtained site construction data until the geological elements in the three-dimensional geological element conceptual model are adaptive to wave velocity; establishing a geology and speed field model with the surficial geology coordinated with wave velocity layers on the basis of the three-dimensional geological element conceptual model with the geological elements adaptive to the wave velocity. According to the method and device for researching the near-surface three-dimensional velocity field of physical geography, the technical problem that in the prior art, a near-surface velocity model is not accurate is solved, and the effect of effectively improving the accuracy of the near-surface velocity model is achieved.

The invention provides an automatic lap changing winder which comprises a frame, a drawing mechanism, a cross cutting mechanism, an air expanding shaft assembly, a large roller synchronous winding mechanism, a turnover mechanism, a pressing claw mechanism and a swing arm mechanism. The automatic lap changing winder is characterized in that the linear surface velocity of the drawing mechanism is equal to that of a large roller when the drawing mechanism and the large roller synchronous winding mechanism are under the action of a main driving motor and a sprocket pair, rotatable air expanding shaft guide wheels are mounted at two ends of an air expanding shaft, guide rails are arranged on the frame, a U-shaped groove in a turnover seat can function in guiding, the air expanding shaft can linearly move in winding, a gear is fixed onto the turnover seat, the turnover seat is supported on the large roller and can turn over around the large roller, the pressing claw mechanism is arranged on the turnover seat to automatically change laps, an arc-shaped head is arranged above a swing arm, and the air expanding shaft guide wheels can be tightly pressed to realize winding and can also be pushed away to discharge coiled materials. The automatic lap changing winder is reasonable in structure and simple to operate, manual lap changing is omitted, continuous production of winding is realized, and production efficiency is improved.

The invention is relates a web cleaning apparatus including: a pair of operatively rotating cleaning rollers operatively disposed on opposite sides of the web; a housing surrounding a major part of the surface of each roller; a vacuum chamber substantially co-extensive with each roller; a longitudinal slot extending parallel to each roller and substantially co-extensive therewith, the slot having an inlet proximate the roller surface and an outlet in communication with the vacuum chamber and operatively providing an air flow path from adjacent the roller into the vacuum chamber, wherein the air flow speed at each inlet is not less than the surface speed of the rollers, and a method of using such apparatus. Another apparatus of the invention includes a housing surrounding the roller and spaced therefrom with a gap of about 0.5 mm to about 5 mm. Further embodiments of the invention provide a shutter for controlling the air flow around the rollers in a cleaning step. Further embodiments of the invention provide a valve controlled bypass line whereby a given portion of a web cleaning apparatus can communicate with the atmosphere such that it is not under vacuum.

The invention discloses a non-contact flow measurement method for measuring a high flood based on the flow velocity of representative vertical line points. The method includes the following steps of (1) determining the positions of one or more vertical lines according to river section data, and using a radar flow velocity meter to measure the flow velocity of a river surface point below a measured vertical line; (2) calculating the flow velocities V1-Vp (the surface point flow velocity of P vertical lines) of the surface points of multiple vertical lines according to the surface point flow velocity of the measured vertical line; (3) conducting arithmetic average on the section surface point flow velocity of the multiple vertical lines, and obtaining the average flow velocity Vsur of the river surface; according to the empirical formula of hydraulics, making the average flow velocity of the river surface multiplied by the surface velocity coefficient lambda to obtain the average flow velocity Vave of the section; (4) according to the river section data, obtaining the river water passing section area corresponding to the set water depth, and making the area multiplied by the average flow velocity of the section to obtain a river flow value. The method can calculate the flow of artificial and natural rivers quickly, conveniently and accurately, and is especially suitable for unattended heavy rain, high flood and other complex disastrous environments.

The bonding method and apparatus (20) includes a delivering of a target web (26) having one or more selected bonding materials through a nip region (30) between at least one cooperating pair of rotatable bonding rollers (32, 34), thereby forming and producing a bonded web (28). In a particular aspect, a pattern roller (32) can be configured to provide a distinctively high, pattern surface speed. In another aspect, the pair of bonding rollers can be configured to provide a distinctively low, bonding pressure value. In further aspects, an anvil roller (34) can be provided with an anvil surface speed, and the anvil surface speed can be configured to be substantially equal to the pattern surface speed.

An improved axial gas bearing for a gas-driven NMR MAS sample rotor is disclosed that utilizes inward flow with a low rotational component over a rotor conical end. A conical flow region is formed between the rotor conical end and a conical stator bearing surface such that the included angle defining the stator surface is not less than the included angle defining the rotor conical end. Gas is injected radially inward with a significant axial rearward component from a number of small holes at high velocity from the periphery into the conical flow region. Compared to the radial velocity components, the tangential flow components of the injected gas are small and preferably opposed to the direction of the rotor rotation. The high and accelerating negative radial velocities may result in significant Bernoulli effect, such that the mean axial pressure over the conical rotor end may be less than atmospheric pressure for a given axial clearance, but as the clearance decreases, the hydrostatic effects exceed the Bernoulli effects and the mean axial pressure over the conical rotor end may then exceed atmospheric pressure by a substantial amount. Thus, a self-stabilizing axial bearing is formed with improved stability and stiffness for rotor surface speeds up to at least 80% of the speed of sound. Motive power required to spin the rotor may be provided by a radial-inflow microturbine at the opposite end of the rotor in a way that is readily compatible with automatic sample change.

This invention relates to a method for one dimensional simulation of multiphase fluid flow in pipelines enabling determination of pressure drop, fluid volume fractions, and heat and mass transfer coefficients in multiphase pipeline flows, wherein the method comprises providing real world values of the superficial velocities of each of the continuous fluid phases, the pipe diameter, and the inclination angle of the pipeline relative to the horizontal plane, providing initial values describing the flow geometry of the multiphase flow, where the initial values at least comprises the axial pressure gradient and the positions of the large scale interfaces separating the continuous fluid phases, employing a one-dimensional numerical model based on Eulerian formulated transport equations of the multiphase flow in the pipeline, solving the numerical model with the set of input values from step a) and b) to determine the flow parameters of the multiphase flow, and displaying one or more of the determined flow parameters.

A method for filling a plurality of microdepressions in a major surface of a web with finely divided powder in which the web is fed continuously to and through a powder filling stage including a driven roller. At the powder filling stage, the powder, which is fed either onto the web upstream of the roller or to the roller of the powder filling stage, is filled into the microdepressions of the web using the driven roller, wherein said roller is rotating about an axis generally transverse to the direction of web, while the surface speed of the roller and the web speed are different and wherein the roller and web are positioned relative to one another, such that between the upper surface of the web and the outer surface of the roller there is a gap. A method of manufacturing an elongate carrier with microdepressions containing finely divided powder comprising steps filling a plurality of microdepressions in a major surface of a web as described, removing from upper surface of the web excess powder not filled within the microdepressions and remaining on areas of the surface between the depressions, and optionally slitting and/or cutting the web in width and/or length.