158results about How to "Improve absorption properties" patented technology

The invention relates to a virtual 3D replaying method based on an earphone. The method comprises the following steps: setting a parameter of a virtual 3D sound source; calculating an absorption value of air to sound and calculating a sound pressure attenuation factor of the sound; calculating a room pulse response (RIR); calculating a position distance d between each sample point of the RIR and a receiving point, calculating a sound pressure of the original sound source after being transmitted for the d distance according to the d; using a interpolation method to process an absorption coefficient of a metope frequency point so as to obtain the RIR after increasing air attenuation and metope absorption; calculating a level angle and an elevation angle between a sound source point position and a head position so as to select a proximal head correlation transmission function; carrying out convolution on head-related transfer function (HRTF) and the RIR after increasing the air attenuation and the metope absorption so as to acquire binaural room pulse response (BRIR); carrying out the convolution on the BRIR and an input sound signal so as to realize a virtual 3D sound signal based on the earphone. By using the method provided in the invention, an '' inner head '' problem during earphone replaying, a distance direction feeling problem, a room characteristic problem and the like can be solved so as to realize a virtual 3D effect based on the earphone.

Disclosed are a radiation absorptive material and more particularly a method of economically coating halloysite or other mineral tubules (including nanotubules and microtubules) with a conductive metal (Cu) in order to produce an absorptive composite material capable of providing shielding and attenuation of radio-frequency signals.

Methods of forming a shaped article having a matrix that contains sintered fly ash are disclosed that include forming a fly ash dough that includes fly ash and water. In one form a superplasticiser is added in the dough. A green article is formed in a desired shape from the fly ash dough that is subsequently fired so that the shaped article is hardened by sintering its fly ash matrix. In one form, the green article is cured under conditions of moderate heating and high humidity. A building element having a matrix of sintered fly ash is also disclosed.

To provide inks and ink sets for inkjet recording, which have good fastness and good jet-out stability and which give good images with no bleeding trouble, yellow ink, black ink and magenta ink for inkjet printing contain at least two dyes each having an oxidation potential over 1.0 V (vs SCE).

The invention provides composite absorbent paper for absorbent sanitation products. The composite absorbent paper comprises an upper isolation layer, macromolecule absorbent resin, highly-fluffy non-woven fabric and a lower isolation layer. The macromolecule absorbent resin comprises upper macromolecule absorbent resin distributed between the upper isolation layer and the highly-fluffy non-woven fabric and lower macromolecule absorbent resin distributed between the highly-fluffy non-woven fabric and the lower isolation layer, and the upper macromolecule absorbent resin and the lower macromolecule absorbent resin are combined in a gluing or thermal combining manner. The macromolecule absorbent resin is characterized in that macromolecules are unevenly distributed in breadth, and a central area with high macromolecule distribution density exists from a central axis to two sides. Due to the fact that the macromolecules form effective distribution gradient in the absorbent paper, the absorbing performance of the absorbent paper can be improved evidently, the utilization rate of the macromolecules is increased, and production cost is lowered.

The invention relates to an infrared detector and a preparation method thereof. The infrared detector comprises a plurality of detector pixels arranged in an array, wherein each detector pixel comprises an electrode layer, the electrode layer is provided with a plurality of patterned hollow-out structures arranged in an array, the patterned hollow-out structures are in an open circular ring shape,and the infrared absorption spectrum section of the infrared detector is a wave band of 3 microns to 30 microns. By means of the technical scheme, wide-spectrum absorption of the infrared detector isachieved, so that the absorptivity of the infrared detector to temperature infrared radiation energy of a target object is greatly improved so as to make the infrared detector have high detection sensitivity.

The invention relates to a large-area perovskite film, a perovskite solar cell module and a manufacturing method. The manufacturing method of the large-area perovskite film comprises the steps of providing an initial solution to a conductive substrate so as to form a film material, wherein perovskite is represented by a general expression ABX3, and a solute of the initial solution at least comprises A, B and X; and applying an anti-solvent to the film material.

The invention relates to an infrared detector and a preparation method thereof. The infrared detector comprises a plurality of detector pixels arranged in an array, and each detector pixel comprises amicro-bridge detector structure and a metamaterial metal layer; the metamaterial metal layer comprises a plurality of metal repeating units arranged in an array, and each metal repeating unit comprises two L-shaped patterned structures arranged diagonally; the infrared absorption spectrum section of the infrared detector is a wave band of 3 microns to 30 microns. By means of the technical scheme,wide-spectrum absorption of the infrared detector is achieved, the absorptivity of the infrared detector to temperature infrared radiation energy of a target object is greatly improved, thus, the infrared detector has high detection sensitivity.

An aircraft cabin panel for sound absorption, with a core layer that comprises a plurality of cells that extend in an open manner across the thickness of the core layer and that are separated from each other by cell walls, and with a first cover layer that faces away from the sound field, as well as a second cover layer that faces towards the sound field and that comprises a plurality of perforation holes. The second cover layer is multi-layered and apart from a layer with the perforation also comprises a second layer that acts as a flow resistance device. The second layer is arranged on the outside, and visually closes off the perforation, and the outer layer comprises an air-permeable woven fabric.

The invention discloses a bismuth-phosphate-based composite photocatalytic material. The bismuth-phosphate-based composite photocatalytic material comprises fluorine-nitrogen-codoped bismuth phosphate, bismuth tungstate and bismuth vanadate at a molar ratio of 1 to (0.1-0.3) to (0.1-0.3). The invention further discloses a preparation method of the bismuth-phosphate-based composite photocatalytic material. The preparation method comprises the steps of dissolving bismuth nitrate pentahydrate in a nitric acid solution, adding a mixed solution of phosphate, ammonium tungstate, ammonium metavanadate and sodium hydroxide solution, and carrying out microwave hydrothermal reaction, centrifugation and drying, so as to obtain the bismuth-phosphate-based composite photocatalytic material. According to the bismuth-phosphate-based composite photocatalytic material, by virtue of codoping of nonmetal fluorine and nitrogen ions, the capacity for capturing electrons at an interface among three semiconductors including bismuth phosphate, bismuth tungstate and bismuth vanadate is effectively improved, and the migration efficiency of electron holes is increased; the three semiconductors are compounded at the interface and can form a heterogeneous structure, so that the separation of photon-generated carriers is effectively promoted, and the photocatalytic activity of a composite system is improved.

Ionic superabsorbent polymers having increased swelling capacity of salt-containing solutions are disclosed. The ionic superabsorbent polymers of the present invention contain an additive to increase the osmotic activity of the polymer in the presence of a salt-containing solution. The additive used in combination with the ionic superabsorbent polymer is capable of forming a zwitterion at a pH of from about 1 to about 9, has a dipole moment greater than that of water, and has a molecular weight less than about 10,000 grams / mole.

The invention relates to an infrared detector and a preparation method thereof, the infrared detector comprises a plurality of detector pixels arranged in an array, each detector pixel comprises an electrode layer, and the electrode layer is provided with a plurality of linear strip structures and a plurality of inflection strip structures. The multiple linear strip structures and the multiple inflection strip structures are alternately arranged in the direction perpendicular to the linear strip structures. The infrared absorption spectrum band of the infrared detector is 8 microns to 24 microns. By means of the technical scheme, wide-spectrum absorption of the infrared detector is achieved, the absorptivity of the infrared detector to temperature infrared radiation energy of a target object is greatly improved, and then the infrared detector has high detection sensitivity.

A nonwoven material for use as an absorbent wiping material produced by hydroentangling of a substrate web including at least one layer of fibres selected from amongst synthetic fibres, regenerated fibres and natural fibres, wherein the nonwoven material has a base level h0 with protuberances on one side, the protuberances forming at least a first and a second surface structure respectively in the form of first and second from the base level h0. The first protuberances have a height h1 from the base level h0 and the second protuberances have a height h2 from the base level h0, where h2 is higher than h1, and each of the second protuberances occupies an area of the surface of the base level at least 4 times greater than each of the first protuberances. A method for producing the nonwoven material is also disclosed.

An aircraft cabin panel (40) is provided for sound reduction in an interior space, which has in at least one region a sandwich construction comprising a core layer (50), a first outer layer (52) and a second outer layer (54). The core layer consists of a sound-absorbing open-pore core material. The first and second outer layers are joined to the core layer over their surface area. The first outer layer is arranged in the direction of the sound waves to be absorbed and the second outer layer is arranged opposite the first outer layer. The first outer layer is formed so as to be acoustically transparent.

The invention relates to a method for suppressing parasitic oscillation in a gain medium of a grazing incidence plate strip. According to the method, a layer of dielectric material is plated on three non-light-through surfaces of the grazing incident plate strip, and the dielectric material shows the absorption characteristic on the parasitic oscillation of the gain medium. The method is simple and is wide in application range, and a better suppression effect on the parasitic oscillation is exerted. A plate strip crystal comprises six surfaces, the parasitic oscillation in the crystal can be enhanced by reflection or scattering of each surface, thus, an absorption medium is plated on all other surfaces except a pumping surface and a light through surface, and a parasitic oscillation loop is cut off to achieve an absorption effect. By the method, the parasitic oscillation of the gain medium with such structure can be effectively suppressed, the energy storage and the gain of the gain medium are improved, the amplified spontaneous radiation (ASE) of a system is reduced, and the output light pulse energy is improved. The method belongs to the technical field of laser.

The invention relates to a photocatalyst, which relates to a visible light responded AgX / Ag2CO3(X=C1, I)composite photocatalyst and its preparation method. The preparation method comprises the following steps: placing silver carbonate in an aqueous solution and ultrasonically dispersing to obtain a dispersion liquid of silver carbonate; fully dissolving halogenated ionic liquid in deionized water, heating in water bath and uniformly stirring, dropping the halogenated ionic liquid in the dispersion liquid of silver carbonate, continuously stirring for a while after dropping; after the reaction is completed, cooling to the room temperature, washing the products obtained in the reaction, and drying to obtain the photocatalyst. The preparation method has the advantages of simple process, and can effectively degrade a colored dye (methylthionine chloride) under visible light irradiation. The method uses good control synthesis function of the ionic liquid, better disperses AgX on an Ag2CO3 matrix, so that a purpose of enhancing the degradation performance of the photocatalysis.

To provide inks and ink sets for inkjet recording, which have good fastness and good jet-out stability and which give good images with no bleeding trouble, yellow ink, black ink and magenta ink for inkjet printing contain at least two dyes each having an oxidation potential over 1.0 V (vs SCE).

The invention provides composite water absorbent paper for an absorbent product. The composite water absorbent paper for the absorbent product comprises an upper isolation layer, macromolecular water absorbent resin, a high-fluffy nonwoven fabric and a lower isolation layer, wherein the macromolecular water absorbent resin comprises upper macromolecular water absorbent resin which is distributed between the upper isolation layer and the high-fluffy nonwoven fabric, and lower macromolecular water absorbent resin which is distributed between the high-fluffy nonwoven fabric and the lower isolation layer; the upper isolation layer, the upper macromolecular water absorbent resin, the high-fluffy nonwoven fabric, the lower macromolecular water absorbent resin and the lower isolation layer are combined together in a gluing or heat sealing manner; the composite water absorbent paper is characterized in that the particle size of the upper macromolecular water absorbent resin is different from that of the lower macromolecular water absorbent resin; the particle size of the lower macromolecular water absorbent resin is smaller than that of the upper macromolecular water absorbent resin. According to the composite water absorbent paper for the absorbent product, the absorption performance of the water absorbent paper can be remarkably improved; the utilization rate of macromolecules is improved; the production cost is reduced.

A vanadium-based glass material is provided and used for sealing glass substrates in the flat-panel display by using laser heating. The low temperature processing and the laser sealing of the vanadium-based glass material are excellent. A sealing glass layer with very small thermal expansion coefficient and extremely excellent water resistance is formed, and the material cost can be greatly reduced. The vanadium-based glass material for local heating and sealing has the following glass: by mol%, 30.0%-60.0% of V2O5, 0.1-30.0% of ZnO, 10.0-25.0% of TeO2, 1.0-5.0% of Al2O3, 0.5-5.0% of Nb2O3, 0-10.0% of BaO, 0-5.0% of Fe2O3, 0-5.0% of MnO, 0-5.0% of CuO, 0-5.0% of SiO2, and 0-8.0% of CaO, substantially not including Pb or P.

An absorbent material which comprises an absorbent resin containing a polyacidic amino acid as a constituent component of the resin and having a structure in which primary particles are agglomerated and including pores having a total pore volume as measured by a mercury penetration method of 0.5 to 5.0 cm<3> / g.

The present invention provides a dual-band visible light broadband absorption structure. The structure comprises a substrate; a metal layer arranged on the substrate; a metal grating layer arranged on the metal layer, wherein the metal grating layer is a one-dimensional grating and comprises a plurality of grating units, grating grooves are formed between each two adjacent grating units, the period of the metal grating layer is not larger than 500nm, the duty ratio of the metal grating layer is between 0.1 and 0.7, the height of the metal grating layer is between 100-500nm, and the imaginary part of the dielectric constant is larger than the absolute value of the real part of the dielectric constant in the metal grating layer; and a filling dielectric layer located in the grating grooves. The present invention further provides a preparation method of the dual-band visible light broadband absorption structure. Compared to the prior art, the structure is simple, the absorption efficiency is high (up to nearly 100%) in the wide incident angle changing range of 0-60 degrees, and dual-bandwidth absorption the TM polarized light and the TE polarized light can be realized.

The invention relates to a magnetic nano-fluid concentrating photovoltaic combined heat and power generation device. The device comprises a photovoltaic battery pack module, and also a photovoltaic battery pack module cooling assembly, a photo-thermal assembly and a magnetic field adjustment assembly; the photovoltaic battery pack module cooling assembly comprises a first header, a second header and an S-shaped cooling pipe; the photo-thermal assembly comprises a circulating pump, a heat exchanger, a plurality of transparent collector pipes, a plurality of light homogenizing bodies, a Fresnel lens and a frame; the light homogenizing bodies are multi-ridge lenses, and the area of the upper surface of each multi-ridge lens is greater than the bottom area of the multi-ridge lens; the magnetic field adjustment assembly comprises an S-shaped magnet and a coil wound around S-shaped magnet arms; one collector pipe is arranged between every two adjacent magnet arms; the S-shaped magnet and the plurality of collector pipes are located in the same plane; the nano-fluid is put into all the first header, the cooling pipe, the second header, the collector pipes, the heat exchanger and the circulating pump. The magnetic nano-fluid concentrating photovoltaic combined heat and power generation device has the advantages of simple structure, increase of solar energy utilization rate and the like.

A tampon has two pledgets or one pledget with an absorbent layer and a leak shield located therebetween. The pledgets or pledget with the absorbent layer and the leak shield are folded such that the leak shield covers a portion of the surface of at least one of the pledgets. Both pledgets or the one pledget with the absorbent layer have absorbencies that are each greater than an absorbency of the leak shield. In another embodiment of the tampon, the leak shield comprises a fluid impervious or fluid repellent material(s). In another embodiment of the tampon, the leak shield comprises of an absorbent or hydrophilic material. Yet in another embodiment, the leak shield comprises of multiple layers of materials that are hydrophilic, hydrophobic, or a combination thereof. A method of fabricating a tampon includes forming a pledget, combining a fluid-impervious polymer material with an absorbent material to define a polymer laminate, ramming the pledget and the laminate into an oven tube, and stitching the laminate to the pledget.

The invention provides an anti-ultraviolet polyamide color master batch and a preparation method of a functional fiber. The anti-ultraviolet polyamide color master batch comprises polyamide powder, adispersing agent, anti-ultraviolet colorant nanopowder, a flame retardant and an antioxidant. A preparation process of the anti-ultraviolet colorant nanopowder comprises the following steps: step 1, adding perylenetetracarboxylic acid-bis-(3,5-dimethylphenyl)imide, cerium sulfide and a titanate coupling agent into absolute ethyl alcohol, carrying out stirring, and then carrying out centrifuging toobtain a colorant pre-dispersion; 2, dissolving antimony chloride into pure acetic acid to prepare a transparent precursor solution, subjecting the transparent precursor solution to reacting at 300 DEG C in virtue of carrier gas by using a spraying thermal decomposition method so as to generate antimony trioxide, repeatedly and uniformly spraying the transparent precursor solution into the colorant pre-dispersion so as to coat the colorant pre-dispersion with the antimony trioxide generated by the reaction, and carrying out vacuum drying to obtain the anti-ultraviolet colorant nanopowder. According to the method for preparing the polyamide functional fiber, the problems of low color fastness and industrial three wastes of the polyamide fiber in the prior art are solved.

This method for producing the carbonized fabric includes thermally carbonizing a woven fabric, a knitted fabric or a woven and knitted fabric composed of cellulosic fiber yarns as a raw material fiber fabric. The method includes restraining and holding the dried raw material fiber fabric having a water content of less than 25% from one of the longitudinal and transverse directions of the fabric, and then heating the fabric in the restrained and held state in a temperature range of 250-450[deg.]C at a temperature-rising rate of 50-200[deg.]C / hr in an oxidizing atmosphere having an oxygen fractional pressure of 50 mmHg or greater in a heating oven, continuously heating the fabric at a temperature-rising rate of 50-200[deg.]C / hr to a final heating temperature range of 750-1,000[deg.]C in a non-oxidizing atmosphere having an oxygen fractional pressure of less than 50 mmHg, and then heating the fabric at the final heating temperature for a prescribed time. Accordingly, the invention provides a method for producing a carbonized fabric, by which the carbonized fabric having excellent electromagnetic wave absorbability, electric characteristics or dielectric characteristics, heat resistance, mechanical strength, flexibility and the like, can relatively easily and economically be produced.

The invention relates to a water current modeling data capturing device with combination of infrared rays and visible light and belongs to the technical filed of virtual reality science. The water current modeling data capturing device comprises a water current generation device, an infrared camera, a visible light camera, a lens filter disc, an infrared transmitter in a specific waveband, a cold light lamp and a semi-transmitting semi-reflecting mirror. In the invention, the water current morphological data capturing device at multiple angles and multiple wavebands is designed by using the principle that the physical properties of water in the visible light and the specific infrared waveband are different; the water current generation device has high reflectivity when exposed under the cold light lamp of the visible light waveband and has high-absorption physical property under a light source of the specific infrared waveband (2.4-3.5mum); the accurate surface segmentation is realized by using the water current morphological data under the multi-angle infrared rays; data captured under visible light are used for model render with higher reality sense; and the better dynamic water current simulation effect can be achieved by combining the water current morphological data acquired under the infrared rays with the data acquired under the visible light. By using the water current modeling data capturing device, dynamic water body biased data and visual information can be acquired simultaneously and accurately; and the modeling distortion caused by inaccurate edge in the traditional method is overcome.