125 results about "Viscous effect" patented technology

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformations.

A fluid-flow simulation over a computer-generated surface is generated using a quasi-simultaneous technique. The simulation includes a fluid-flow mesh of inviscid and boundary-layer fluid cells. An initial fluid property for an inviscid fluid cell is determined using an inviscid fluid simulation that does not simulate fluid viscous effects. An initial boundary-layer fluid property a boundary-layer fluid cell is determined using the initial fluid property and a viscous fluid simulation that simulates fluid viscous effects. An updated boundary-layer fluid property is determined for the boundary-layer fluid cell using the initial fluid property, initial boundary-layer fluid property, and an interaction law. The interaction law approximates the inviscid fluid simulation using a matrix of aerodynamic influence coefficients computed using a two-dimensional surface panel technique and a fluid-property vector. An updated fluid property is determined for the inviscid fluid cell using the updated boundary-layer fluid property.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

A porous sound absorbing structure 10 includes an exterior plate 1 and a closing plate 2 in order to suppress a decrease in sound absorbing performance in a wide frequency band. An interior plate 3 is arranged between the exterior plate 1 and the closing plate 2, and air layers 4 and 5 are located between the exterior plate 1 and the interior plate 3 and between the interior plate 3 and the closing plate 2 respectively. The exterior plate 1, the interior plate 3, and the closing plate 2 are arranged while opposed to each other. Many through holes 1a and 3a are made in the exterior plate 1 and the closing plate 2 respectively. In the interior plate 3, a plate thickness t2 and a diameter φ2 and an aperture ratio β2 are set so as to generate an viscous effect in air passing through the through hole 3a. The aperture ratio β1 of the through hole 1a in the exterior plate 1 is set more than 3% and not more than 50%.

The invention discloses a hemostatic non-viscous material and a preparation method thereof. The material comprises a non-viscous layer of a compact structure, and a hemostatic layer of a loose structure. The non-viscous layer is composed of at least two non-viscous sublayers wrapped up layer by layer. The apertures of small holes in each non-viscous sublayer are of a gradient structure and gradually decrease from outside to inside. The hemostatic layer is also provided with spongy small holes. According to the method, the air-drying, the freeze-drying, the activation and the complexation are conducted respectively. In this way, the non-viscous layer of the compact structure and the hemostatic layer of the loose structure are prepared. Meanwhile, the hemostatic and non-viscous effect of the material is remarkably improved. The material and the method are convenient in clinical application.

The invention provides a user organization management system which includes a server and at least a client connected with the server; the server includes a relation entity creating module used for creating a relation entity according to the relation entity information, a user verification module used for verifying the user information provided by the user, a user management module used for adding the user to the relation entity and managing the user and a data base which is connected with the modules and stores the user and / or relation entity information. The user organization management system realizes the organization management of user registration, user information verification and adding the user to the relation entity, guarantees the authenticity and integrity of the user information, has viscous effect on the user and attracts the users to register through the actual social relationships among the users and the users are encouraged to fill in with the true information. The user organization management system has the advantages of improving the activeness of the users, improving the viscosity of the community, prompting the users to introduce more relation entities and invite other users to register; thereby the effects of wide propagation and expanding influence are realized.

A perforated soundproof structure is formed by oppositely arranging an external plate 1 and an internal plate 2 having a number of through-holes 2a. The board thickness, hole diameter and open area ratio of the internal plate 2 are set to satisfy design conditions to give rise to a viscous effect in the air passing through the through-holes 2a, and the design conditions are set so that the frequency bandwidth to attain an absorption coefficient of 0.3 or more is 10% or more of the resonance frequency.

A driving device for an image carrying member, e.g., a belt, is to be provided that causes no increase in size and cost of the device and sufficiently stabilizes the velocity of the image carrying member upon fluctuation in load, so as to suppress or prevent formation of an image defect referred to as so-called “banding”. A rotating member is made in contact with at least one of a driving force transmitting member and an image carrying member, which are arranged in a driving force transmission path for transmitting the driving force to the image carrying member, and the rotating member rotates in contact with the driving force transmitting member or the image carrying member, and providing, upon occurring fluctuation in velocity of the driving force transmitting member or the image carrying member, a viscous effect that suppresses the fluctuation in velocity.

The invention discloses a double-layer hydrogel bionic hand and a preparation method thereof. The double-layer hydrogel bionic hand is formed by bonding a layer of polyacrylic acid hydrogel with pH responsiveness and viscidity and a layer of Fe<3+> cross-linked polyacrylic acid hydrogel through the viscous effect; the double-layer hydrogel bionic hand can be similar to a human hand to achieve bionic actions of hand closing and opening through a method of changing the pH values and ionic strengths of solutions in the solutions with the different pH values, and the effects of grabbing and releasing objects are achieved.

The invention discloses an iterative propulsion disturbance domain updating method for aircraft dynamic aerodynamic characteristic simulation. Aiming at the problem that a large amount of invalid calculation exists in an existing aircraft dynamic aerodynamic characteristic numerical simulation method, three kinds of dynamic calculation domains of unsteady, convection and viscosity are adopted, anda solving thought that only non-convergent unsteady units are solved and the viscosity effect is only considered in a local area is provided, wherein the unsteady dynamic calculation domain only comprises grid units which play a leading role in the unsteady effect at each physical moment; the convection dynamic calculation domain only comprises grid units which are disturbed in each iteration step and are not converged yet, the viscosity dynamic calculation domain only comprises grid units which play a leading role in the viscosity effect in the convection dynamic calculation domain, and thethree types of dynamic calculation domains can be updated in a self-adaptive mode in each iteration step. By avoiding invalid calculation in unsteady numerical simulation and reducing the number of iteration steps required for inner iteration to reach a convergence state, the calculation efficiency of aircraft dynamic aerodynamic characteristic numerical simulation can be remarkably improved.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

The invention discloses a production process for converting gray black barite into a white barite finished product. The process flow comprises: crushing black barite raw ore, roasting, grinding into powder, washing with water, pickling overflow liquid obtained after washing with water, rinsing, filtering, drying, finely breaking, packing and obtaining finished product, wherein the bottomflow liquid obtained after washing with water is filtered, the product obtained is dried and finely ground, and the ground product is packed and thus, the drilling fluid finished product is obtained. When the production process is used, gray black barite can be converted into white barite which can be directly used in paint making, coating, paper making and the like industries as a filler, the density of barite can be increased greatly, the corresponding indexes such as alkali metal content and viscous effect can be improved correspondingly, the prepared drilling fluid weighting agent can meet high-density and high-quality drilling fluid requirements, the application range of the gray black barite can be obviously expanded and the utilization value of the gray black barite can be increased.

This invention discloses one device to test contact surface real area and adhesive effect, which comprises the following parts: direct current motor, measurement experiment rack, pulling sensor, top test sample and ball hinge down test sample, amplifying circuit, A / D conversion card and computer, wherein, the motor is orderly connected to pulling sensor, top sample phase; the down sample hinge rack is fixed on bottom socket; the said pulling sensor is connected to amplifying circuit, A / D conversion card and computer; electrical signals are amplified into A / D conversion card into computer by use of computer data collection program.

The invention discloses a flexible pressure sensor and a preparation method thereof, a sensing system and flexible electronic skin. The flexible pressure sensor comprises a first electrode layer and asecond electrode layer which are oppositely arranged in parallel; a first dielectric layer is arranged on the inner side of the first electrode layer and is provided with array type first tip structures, and a second dielectric layer is arranged on the inner side of the second electrode layer and is provided with array type second tip structures; when a flexible pressure tactile sensor is pressed, the first tip structures are extruded by at least two adjacent second tip structures; and the top ends of the first tip structures make contact with the horizontal plane of a second planar excitation electrode, and the top ends of the second tip structures are suspended. According to the structure, by changing materials and designing and arranging the dielectric layer structures, the defect thatthe recovery time is long due to the viscous effect is overcome, and higher detection sensitivity and higher response speed are achieved.

The lift and drag performance of all vehicles is strongly influenced by viscous effects, and in turn, laminar separation bubbles. This application employs an effective fluid boundary layer control strategy that reduces parasitic drag, allows for more usable angles of attack, and delays or stops separation. In the approach of this application, the control surface effectively uses the Magnus effect to delay or stop a separation bubble from forming, which can increase lift, reduce drag, and delay degrees of stall by directly manipulating the velocity gradient in the fluid boundary layer.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

The invention discloses a gradational-section low-frequency sound absorber design method. By constructing a gradational section structure folded in space, the sound absorber can thus absorb low-frequency sound waves effectively by utilizing structural resonance and air thermal viscous effects. Compared with the traditional uniform channel sound absorber, the sound absorber constructed by the method can achieve a lower sound absorption frequency in the same volume, and can change the sound absorption frequency without changing the shape. By installing a plurality of sound absorbers with different peak absorption frequencies in parallel, low-frequency broadband sound absorption at a sub-wavelength scale can be realized. In summary, the sound absorber constructed by the method of the invention has the characteristics of simple structure, low processing difficulty and easy installation and use.

The invention provides a method for testing concrete viscous effect evolution under an erosion condition. The method comprises concrete relaxation time evolution test and concrete damage evolution determination under an erosion condition. The method can be operated simply, provides a concrete relaxation time test method under an erosion condition, provides a concrete damage evolution determination method, can accurately test a concrete material viscous effect evolution rule under the erosion condition and does not damage a test piece to be detected.

The invention discloses a partition disturbance domain updating calculation method for steady viscous compressible streaming of an aircraft, and belongs to the field of computational fluid mechanics.The method comprises the following steps: reading a file; initializing a flow field; establishing an initial convection dynamic domain and an initial viscosity dynamic domain; allocating a storage space; assigning a conservation amount of the boundary virtual grid according to the boundary condition type; estimating a residual error; performing time integration; increasing the convection dynamic domain; reducing convection and viscosity dynamic domains; reallocating the storage space; increasing a viscous dynamic domain; repeating the above steps until a convergence condition is reached; and outputting a result. According to the invention, the convection dynamic domain and the viscosity dynamic domain which can be adaptively increased / decreased are adopted; only the disturbed units which are not converged yet are solved, the viscous effect is only considered in part of the disturbed units, the calculated amount of a single iterative step and the total iterative step number can be effectively reduced, and therefore the convergence rate of solving the steady viscous compressible streaming of the aircraft is increased.

The invention relates to a concrete spreader, comprising a bracket (1) and a hopper (2), wherein the hopper (2) is connected with the bracket (1); the lower end of the hopper (2) is provided with a discharging opening (4); and an accelerated discharging device (3) is arranged at the discharging opening (4). Compared with the prior art, the concrete spreader ensure that concrete falling from the discharging opening has certain initial speed under the action of the accelerated discharging device because the concrete spreader is provided with the accelerated discharging device, the falling speedis quicker, and the concrete is more compact when falling to a tubular pile steel die; the accelerated discharging device can also ensure that the volume of the concrete passing through the discharging opening in unit time is more than that of the concrete falling naturally in unit time, and therefore, the purpose of increasing discharging amount can be realized without increasing an aperture of the discharging opening; and because the accelerated discharging device is not in complete contact with the concrete, the viscous effect of the accelerated discharging device on the concrete is less, the power required by the accelerated discharging device is lower and the wearing is less.

The invention discloses a concrete spreader. The concrete spreader comprises a support (1) and a hopper (2) connected with the support (1). A discharging outlet (4) is formed in the lower end of the hopper (2). A discharging accelerating device (3) is arranged in the discharging outlet (4). Compared with the prior art, since the discharging accelerating device is arranged in the discharging outlet, under the effect of the discharging accelerating device, concrete falling via the discharging outlet has a certain initial velocity, the falling velocity is higher, and the concrete is compact whenfalling into a tube pile steel mould; the discharging accelerating device enables the volume of the concrete passing through the discharging outlet within a unit time period to be greater than the volume of the concrete falling under gravity within the unit time period, and the purpose of increasing the output capacity can be achieved without needing to increasing the opening degree of the discharging outlet; and in addition, the discharging accelerating device does not make complete contact with the concrete, a viscous effect of the concrete on the discharging accelerating device is small, accordingly, power needed for the discharging accelerating device is low, and abrasion is small.

The invention provides a ceiling type air conditioner indoor unit. The ceiling type air conditioner indoor unit comprises a shell, a heat exchanger and a laminar flow fan, wherein the shell is provided with air inlets and air outlets; the heat exchanger is arranged in the shell; the laminar flow fan is arranged in the shell, and comprises a plurality of annular disks which are arranged in parallelat intervals and are fixedly connected with each other; when the plurality of annular disks are driven to rotate, air is sucked into a cavity on a radial inner side from one axial end, and then air boundary layers on the surfaces of the annular disks are driven by the annular disks to rotationally move from inside to outside along a radial direction due to the viscous effect to form laminar flowwind, in order that air is driven to flow through the heat exchanger from the air inlets, and then flow to the air outlets in order to return to a room; two guide plates which are arranged oppositelyand rotationally are arranged on each air outlet; each guide plate is provided with a plurality of ventilation micro-holes along a thickness direction; and two guide plates can rotate in a deviating way to positions where the air outlets are opened, so that a channel formed between the two guide plates is used for guiding the air outlet direction, or rotate toward to each other to positions wherethe air outlets are closed, so that air outlet current is blown through the plurality of ventilation micro-holes.

The invention relates to a pure radial supersonic speed micro turbine structure with an air bearing. The structure is characterized in that air flow enters a turbine stator runner (5) from the radial direction, and then the flowing direction of the air flow in a turbine is always kept in the radial direction; according to a stator part, stator blades (2), an upper casing (1) and a lower casing (4) form a contraction and release flow channel, and the cross section area of a throat part of the flow channel is equal to the critical area of designed flow, so that airflow is accelerated to supersonic speed; an inlet blade of a rotor impeller (3) is in a blunt end shape to block part of the flow area so as to adapt to the small flow design requirement of the micro turbine; and dynamic pressure grooves (7) are engraved in the back face and the edge of the rotor impeller (3) and matched with the lower casing (4) to form a dynamic pressure air bearing runner (6), and when the rotating speed of the turbine reaches a design value, air in the dynamic pressure grooves provides supporting force due to the viscous effect, and the thrust and radial bearing effects are achieved. The structure can realize expansion acting of small-flow high-pressure gas and has the characteristics of being compact in structure, extremely high in rotating speed, small in required flow, capable of acting by using cold air, high in expansion ratio and strong in acting capacity.

The invention relates to the technical field of lithium ion batteries, and in particular relates to a polar plate positioning mechanism, a lithium ion battery lamination device and a lithium ion battery lamination method. The polar plate positioning mechanism is used for location of a polar plate, the polar plate positioning mechanism comprises a positioning placing plate, the upper surface of the positioning placing plate is used for placing the polar plate, the upper surface of the positioning placing plate is provided with a liquid guiding channel, and the liquid guiding channel is used for discharge of an electrolyte on the polar plate. The lithium ion battery lamination device and the lithium ion battery lamination method both adopt the polar plate positioning mechanism, the polar plate positioning mechanism and the lithium ion battery lamination device can improve the viscous effect of the polar plate in the process of positioning due to excess electrolyte, and have the advantages of good localization effect, the lithium ion battery lamination method can effectively pre discharge the excess electrolyte on the polar plate for preliminary positioning, and the lamination method is simple, and has good lamination effect.

The invention provides an indoor unit of a wall-mounted air conditioner. The indoor unit of the wall-mounted air conditioner comprises a shell, an evaporator and two laminar flow fans, wherein a cavity is defined in the shell, the shell comprises a front panel and a rear shell, the rear shell is provided with an air inlet, and the front panel is defined with two air outlets; the evaporator is arranged at the position, corresponding to the air inlet, inside the cavity and is configured to exchange heat with air entering the cavity through the air inlet, the evaporator is provided with a peripheral wall and a bottom wall, the bottom wall is parallel to the front panel, and the peripheral wall is positioned on one side close to the front panel; and the two laminar flow fans are arranged on the front side of the evaporator and are configured to enable air subjected to heat exchange of the evaporator to form laminar flow air by utilizing a viscosity effect and enable the laminar flow air tobe blown out from the air outlets. According to the indoor unit of the wall-mounted air conditioner, laminar air supply is realized through the viscosity effect, the noise is low, and the air quantity is high; the two laminar flow fans can respectively and independently control air supply; and the cover buckle type evaporator greatly increases the heat exchange area and effectively improves the overall working efficiency of the indoor unit of the wall-mounted air conditioner.

The invention discloses a deep pool lotus rhizome planting method comprising the following steps: using modified China fir and bamboo as raw materials; modifying the raw materials so as to allow particle surfaces to have viscous effect, thus agglomerating with tombarthite, preventing lotus root pool soil hardening, and providing inorganic ion adsorption effect, so the inorganic nutrient composition in the soil cannot be easily dissolved and dispersed into surface water, thus controlling fertilizer loss when lotus root pool controls water level, and the soil nutrient can be easily absorbed by lotus rhizome node fibrous roots. The deep pool lotus rhizome planting method can improve nutrient utilization rate, can save fertilizer, and can improve environment.