314results about How to "Prevent embedding" patented technology

Ceramic bodies can be made by providing an initial green body of ceramic; and machining the initial green body to provide a machined green ceramic body. Embedding the initial green body in an embedding mass can be avoided. The initial green body can be bisqued, infiltrated an adjuvant such as machining wax, removing the infiltrated body, and machining it. Highly detailed ceramic products can be generated. The machined green ceramic body may be fired and/or further processed to provide a more finished ceramic body. Examples include a femoral component for a posterior stabilized knee implant, a component body for an artificial rotation device containing knee implant prosthesis a dental implant or bridge, an ice skating blade, and so forth. Zirconia ceramics are advantageously employed, for an example, Mg-TTZ.

A method, apparatus and system for distributing multimedia data in an efficient way using multicast transmission, whereby each receiver is provided with his own unique identifier in the form of a watermark and also additional information, typically global information for instance to comply with DRM rules, in the same watermark.

The invention discloses a radio-frequency micro-capacitance fingerprint acquisition chip and method. The chip comprises a plurality of reference sensing units, a two-dimensional sensing unit array formed by the reference sensing units, an insulating layer, an insulating substrate serving as a finger contact surface, a radio-frequency signal generation circuit, a radio-frequency drive electrode, a sensing unit array controller used for providing bias-power-supply switching signals for switching on or switching off the sensing units and charge-discharge sequence signals needed by the sensing units, an analog-digital conversion array, a digital-analog converter for controlling the gain of the analog-digital conversion array, a sensing unit offset correction circuit, a fingerprint image cache, a fingerprint image output controller and an image signal processor. Due to the improvement of the structure of the sensing units and the additional arrangement of the sensing unit offset correction circuit, the radio-frequency micro-capacitance fingerprint acquisition chip can solve the problems of fingerprint residual, interference caused by other radiofrequency radiation, false fingers and small detection depth; besides, the chip can be embedded into a capacitive touch screen.

The invention relates to a composite anode material for a lithium ion battery, and a preparation method and application of the composite anode material. By heteroatom doping, the capacity of charred soft carbon is enhanced; and meanwhile, a carbon/carbon composite anode material is prepared by combining the charred soft carbon and a graphite material with mass ratio of (90-40):(10-60) and coating an organic matter pyrolytic carbon layer through combining the advantages of high rate capability and excellent cycle performance of the charred soft carbon and high initial efficiency of the graphite material and a simple, cheap and environment-friendly process line. The grain size D50 of the anode material is equal to 6.0 to 20.0 micrometers, the specific surface area is 1.0 to 5.0 square meters per gram, the compaction density is 1.0 to 1.5 grams per cubic meter, the initial coulombic efficiency is increased to over 85%, the capacity retention ratio after circulation of 500 times is greater than 90%, the rate capability is enhanced, the capacity retention ratio at 30C/1C is greater than 95%, and the composite anode material can be applied to the lithium ion battery.

The invention discloses a video watermarking method based on a visual attention mechanism. Binary-system watermark information is embedded into a DCT domain in a visual non-saliency area of an MPEG-2 video key frame is selected to achieve the purpose of video copyright protection. The video watermarking method comprises the following steps of decoding a carrier video and obtaining the video key frame I; adopting a Koch and Itti visual remarkable model to analyze visual saliency of the video key frame and dividing a visual saliency area; selecting the visual non-saliency area human eyes are not too sensitive to, performing fixed-step-length odd-even quantization index modulation on a DCT direct current coefficient of luminance component and embedding watermark information; analyzing the visual saliency of the video key frame with embedded watermarks, judging a watermark embedding area and extracting the watermark information according to watermark embedding rules. The visual attention feature of the human eyes is effectively utilized in the video watermarking method, the invisibility of the video watermarks is improved, the video watermarking method has good robustness on common video attacks, and contradiction between the watermark invisibility and the robustness is effectively relieved.

The invention provides a heat-insulating and ablation-resistant glass fiber fabric and a preparation method thereof, belonging to the technical field of thermal protection fabrics and preparation thereof. The heat-insulating and ablation-resistant glass fiber fabric product comprises a fabric layer and coating layers on the front and back surfaces of the fabric layer, wherein the thicknesses of the coating layers on the front and back surfaces of the fabric layer are controlled at 30-80 micros; the fabric layer is made from glass fiber fabrics; the coating layers are composite organic silicon resin coating layers which are prepared by mixing an organic silicon resin solution, white carbon black, mica powder and the like in certain percentage by weight; a solute of the organic silicon resin solution is phenyl methyl silicone, a solvent of the organic silicon resin solution is dimethylbenzene, toluene or a mixture of the two, and the mass ratio of the solvent to the solute is 1:1; and a preparation method of a composite organic silicon resin coating layer solution comprises the following steps of: sequentially adding the white carbon black, the mica powder, wollastonite in powder and metallic oxide into the organic silicon resin solution, and stirring to ensure that the substances are uniformly dissolved. The heat-insulating and ablation-resistant glass fiber fabric is simple in process, easy to operate, and excellent in heat resistance, weather resistance, insulating property, reinforcement performance, scrubbing resistance and weathering resistance.

The invention relates to a fracturing pulse sand filling system with ultrahigh flow conductivity. The fracturing pulse sand filling system comprises an external control unit, an internal controlled unit, an external fracturing pump truck unit, a sand mixing truck and a fluid storage tank. Fracturing sand-mixed fluid is accommodated in the sand mixing truck, fracturing base fluid is accommodated in the fluid storage tank, the external control unit controls the internal controlled unit, so that the sand-mixed fluid in the sand mixing truck and the base fluid in the fluid storage are alternately pumped into the external fracturing pump truck unit at intervals, and the sand-mixed fluid and the base fluid are finally alternately pumped into underground exploitation cracks at intervals by the external fracturing pump truck unit. The fracturing pulse sand filling system has the advantages that propping agent slugs added with fibers can be injected in a pulse manner under the control of the system, the flow conductivity of the prop cracks is greatly improved, a lag effect due to continuous opening and closing of an existing sand mixing truck is prevented, damage to the sand mixing truck is reduced, and pressure building during propping agent injection can be effectively prevented by the system.

The invention discloses a film-coated modified propping agent, and a preparation method and an application thereof. The film-coated modified propping agent is composed of a matrix and a resin layer uniformly coated out of the matrix, wherein the matrix is Hobq quartz sand; the resin layer is 1-10 wt% based on that of the matrix; and the resin layer comprises a resin binder and a curing agent, wherein the resin binder is bisphenol A epoxy resin, polyurethane resin or a combination thereof, the curing agent is an aliphatic polyamine curing agent an oralicyclic amine curing agent, and the usage amount of the curing agent is 10-50 wt% based on that of the resin layer. The preparation method of the film-coated modified propping agent is that the resin layer is coated on the outer surface of the matrix. The film-coated modified propping agent can be applied in fields of fracturing exploitation of oil and gas wells, is helpful to increase sand ratio and reduce usage amount of fracturing liquid, can effectively prevent backflow phenomenon, alleviates insertion of the propping agent, increases crack diversion capability, prolongs fracturing validity period, is helpful to increase oil output, reduces water yield and has significant meaning for solving the exploitation of low permeability oil field.

The invention provides a composite lithium supplement diaphragm and a secondary battery thereof, the composite lithium supplement diaphragm comprises a porous base membrane, a lithium-containing layer is arranged on one side of the porous base membrane, the lithium-containing layer comprises lithium sources, inorganic ceramic powder and a binder, the lithium sources are in gradient distribution in the thickness direction of the lithium-containing layer, and the mass ratio of the lithium source close to one side of the surface of the porous base membrane is relatively low. According to the invention, the irreversible active lithium loss in the first charging process can be effectively compensated without additionally supplementing lithium on the surface of the positive pole piece or the negative pole piece, so that the energy density and the cycle life of the lithium ion secondary battery can be remarkably improved. The lithium source in the lithium-containing layer of the composite diaphragm is in gradient distribution, and the active lithium content is relatively low on one side close to the surface of the base membrane, so that the contact area of metal lithium powder or a lithium-containing compound and the like with the base membrane can be effectively reduced, the risk that micropores of the base membrane are possibly blocked is reduced, and the performance of a battery cell is further improved.

The invention provides an adaptive hierarchical structure light-based touch detection system and method. The system comprises a touch detection unit, a projection unit, an image sensing unit and a control unit, wherein the touch detection unit is used for receiving original interface image data from the exterior of the system, receiving a projection region image data photographed by the image sensing unit and processing the image data, and acquiring and outputting touch information of a touched object; the projection unit is used for projecting an original interface image to a projection plane to image; the image sensing unit is used for acquiring and outputting the projection region image data; and the control unit is used for controlling ordered cooperative work between every two units and controlling the synchronization between the projection unit and the image sensing unit. By using a structure light three-dimensional measurement principle, the distance between the touched object and the projection plane can be accurately measured, and the measurement precision and the touch detection accuracy are guaranteed; the amount of calculation of structure light generation and extraction is reduced; and the problem of flickering of hidden embedded structure light or image quality reduction is effectively solved.

The invention belongs to the technical field of battery production and relates to a battery cell pole sheet. The battery cell pole sheet comprises a pole sheet and tabs; the pole sheet is provided with a coating area and an empty foil area; the tabs are accommodated in the empty foil area; the tabs are covered with first insulating paste; a plurality of grooves matched with the first insulating paste are formed in the coating area at intervals; the first insulating paste is accommodated in the grooves; and second insulating paste is arranged at the bottom surfaces of the grooves. With the battery cell pole sheet of the invention adopted, the problem that the paste application positions of wound pole sheets are too thick can be solved; the overall thickness of a battery cell is reduced; theenergy density of a battery is improved; and the quality of the battery can be improved. The invention also discloses a battery cell.

The invention discloses a method for correcting the infrared focal plane heterogeneity based on a sigma filter. According to the method, sigma filter with the template size of 5*5 is performed on an image after linearity correction, self-adaptive adjustment of the iteration step length of a correction parameter and detection and replacement of abnormal pixels (bad pixels, impulse noise and the like) are completed when edge-preserving smooth filter is achieved, motion detection is achieved by using a change reference image, and only when the difference between the corrected image and the change reference image is larger than a change threshold value, update of the self-adaptive iteration step length is performed on the heterogeneity correction parameter. The sigma filter is applied to correction of the infrared focal plane heterogeneity, the heterogeneity parameter estimation error is reduced by using the edge preserving characteristic, the 'ghost objects' inhibiting capacity is strengthened, simultaneously, the self-adaptive iteration step length and detection and replacement of the abnormal pixels are achieved through the sigma filter, the computational complexity is low, and the method is suitable for hardware circuits.

The invention discloses a magneto-rheological finishing method of easy-deliquescence crystals. The method includes the steps of firstly, preparing non-aqueous magneto-rheological finishing solution; secondly, adding the non-aqueous magneto-rheological finishing solution into a magneto-rheological machine tool circulating system for magneto-rheological finishing twice; thirdly, then using aromatic hydrocarbon to clean the easy-deliquescence crystals fast so as to complete the finishing. The method is simple in process flow and high in operability, and high-precision and ultra-smooth easy-deliquescence crystals which can satisfy the high, medium and low frequency band requirements of a strong-light optical system.

The invention relates to a sodium ion pre-embedded MoO3 nanobelt as well as a preparation method and application of the sodium ion pre-embedded MoO3 nanobelt. The sodium ion pre-embedded MoO3 nanobelt can be used as a positive electrode active material of a lithium ion battery. The preparation method comprises the following steps: (1) adding MoO3 nanobelt, PEG4000 and NaCl into deionized water, and stirring; (2) transferring the solution into a reaction kettle, carrying out hydrothermal reaction, taking out the solution, and cooling to the room temperature; and (3) after carrying out centrifugal separation on the obtained product, repeatedly washing the product with deionized water and ethanol, and finally drying the product in a drying box, so as to obtain the sodium ion pre-embedded MoO3 nanobelt. The preparation method has the beneficial effects that sodium ions are pre-embedded among layers, so that the substantial attenuation of the capacity in a primary cycle period is avoided, the electrochemical property of MoO3 is improved, the conductivity of the material is improved, furthermore, the cycling stability of the electrode material is effectively improved, and the electrode material can be used as a potential application material of the lithium ion battery, can meet the requirements of green chemistry and is beneficial to market promotion.

The invention provides a method for making built-in finished product, a built-in nut, and a built-in finished product. The invention can prevent the resin from spreading into the gap between the pin member and threaded hole of the built-in nut by utilizing the resin to block the opening end face of the top side of the built-in nut. The die assembling is carried out in a state that makes the built-in nut (40) and a pin member (50) on the molding surface (34a) of die cavity (36) arranged in the die (30) be engaged to support the built-in nut, with the die cavity being injected and filled with resin, thereby forming the built-in finished product with a built-in nut. The built-in nut is provided with a straight hole portion (45) at the top portion, with the internal diameter of the straight hole portion (45) being equal to or less than that of the threaded hole portion (44). When the built-in nut is embedded in the pin member, the straight hole portion is jogged to the top end portion of the pin member. The built-in molding is carried out by utilizing the resin to block the opening end face at the top side of the built-in nut.

The invention relates to an electrochemical CO gas sensor which comprises a shell (6), a porous film (7), a reference electrode (1), a working electrode (2) and an auxiliary electrode (3). The reference electrode (1), the working electrode (2) and the auxiliary electrode (3) are encapsulated in the shell (6). The electrochemical CO gas sensor is characterized in that a composite catalyst film (5)is coated on the working electrode (2), hydrogel (4) is simultaneously coated on the reference electrode (1), the auxiliary electrode (3) and the composite catalyst film (5) which is formed by mixinga mixed catalyst and N-octyl pyridinium hexafluorophosphate in a mass ratio of 1-20 to 1, the mixed catalyst is formed by mixing nano Pt/carbon nanotubes and nano nickel / carbon nanotubes in a mass ratio of 10-40 to 1, and the hydrogel is gel formed in a way that superabsorbent absorbs water which contains dissolved lithium perchlorate and polyvinyl alcohol. The sensor is watertight and has the service life of 3-5 years and stable performance, and the decorative film on the working electrode is replaceable.

Antistatic footwear for man, woman and child comprising an upper portion, an outer sole (3) and an insole (1, 2) disposed between the outer sole (3) and the upper portion. One or more electrical conductors positioned within the outer sole and contacting one or more electrically conductive regions of the insole (1,2) provide an electrical contact between the foot of the user and the ground.

The invention relates to a low-temperature sand-prevention resin coated propping agent for an oil-gas well and a preparation method of the low-temperature sand-prevention resin coated propping agent. The low-temperature sand-prevention resin coated propping agent comprises a propping agent aggregate, a precuring reinforced resin membrane and a low-temperature sand-prevention resin membrane, wherein the precuring reinforced resin membrane is made of reinforced resin applied to the surface of the propping agent aggregate; the low-temperature sand-prevention resin membrane is made of low-temperature sand-prevention resin applied to the surface of reinforced resin; the reinforced resin is selected from epoxy resin and/or thermoplastic phenolic resin; the low-temperature sand-prevention resin is sulfonate polyester resin.

A jack with an optionally pivoting foot provides a trailer owner the ability to change between a wheel and a flat foot or a flat foot and a wheel upon a jack depending from a trailer tongue. The present invention has an optional foot attached to a jack that rotates from a horizontal position to underneath an existing foot. The foot has two parallel spaced apart flanges extending upwards from a base. The flanges have a bolt through a centered hole near the wheel about which the pivoting foot rotates. Opposite the base, the flanges have three holes about the perimeter through which a handle inserts. The handle secures the foot in either horizontal or vertical configurations. When in a vertical configuration, a wheeled jack does not move upon nor embed into the ground. A jack with a flat foot prevents a trailer from moving.

The invention relates to a shoveling machine device for a floor. The shoveling machine device is characterized by comprising a shell, oval gears, a pressing mechanism, a telescoping mechanism, a spraying mechanism and a stabilizing mechanism, and the oval gears rotate to be used for outputting the variable transmission ratio rotation speed, and drive a slide block to slide back and forth on the plane; a heavy block of the pressing mechanism is used for generating downward pressure, and the dirt-shoveling effect is improved; the stabilizing mechanism comprises a stable suction cup and an electric push rod, through the electric push rod, the suction cup is pushed to be sucked to the ground, and the stabilizing mechanism is used for preventing slip from being generated between a forklift andthe ground; the spraying mechanism sprays a cleaner through a water pump, and is used for improving the efficiency of shoveling dirt and cleaning the dirt of a relieving tool. By means of the shoveling machine device for the floor, the hard-to-remove dirt on the floor can be effectively shoveled away, the dirt-shoveling efficiency is high, the shoveling machine device has a manual sweeping mode and an automatic sweeping mode, has high adaptability aiming at different environments, and is applicable to cleaning work of places like large-scale offices, classrooms and campuses.