67results about How to "Small aperture size" patented technology

The spectral diversity of the iris can be used as a unique biometric identifier. By careful selection of a number of spectral bands, four or more, the hyper-spectral signature derived from data contained in those bands can distinguish color signatures that are not visually distinguishable in RGB color space to uniquely identify a person. Classification of hyper-spectral signatures requires less spatial resolution than the classification of texture signatures, maybe an order of magnitude or more. This reduces the size of the sensor aperture required at a given range.

An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.

The invention relates to a roadbed filler for a road and a preparation method of the roadbed filler. The roadbed filler for the road is characterized by being prepared from lime, pulverized fuel ash, phosphogypsum and stabilizer. The weight percentage of each material in the lime, the pulverized fuel ash and the phosphogypsum is 15% of lime, 30-50% of pulverized fuel ash and 35-60% of phosphogypsum; the sum of the weight percentages of the materials is 100%; the stabilizer is water glass or NaAlO2 (sodium metaaluminate); the adding amount of the water glass is 2-6% of total mass of the lime, the pulverized fuel ash and the phosphogypsum, and the adding amount of the NaAlO2 is 0.5-2% of total mass of the lime, the pulverized fuel ash and the phosphogypsum. Due to the roadbed filler for the road prepared by the method, not only can the early strength be improved, but also the problem of water stability can be solved.

An antenna element including a base plate, a first ground clustered pillar projecting from the base plate, a second ground clustered pillar projecting from the base plate and spaced apart from a first side of the first ground clustered pillar, a first ground member projecting from the base plate between the first ground clustered pillar and the second ground clustered pillar, wherein a distal end of the first ground member is configured to capacitively couple to the second ground clustered pillar, and a first signal member projecting from the base plate between the first ground clustered pillar and the first ground member, wherein the first signal member is electrically insulated from the base plate, the first ground clustered pillar, and the first ground member, and a distal end of the first signal member is configured to capacitively couple to the first ground clustered pillar.

The present invention discloses a method for removing hexavalent chromium in wastewater by using a beta-cyclodextrin chitosan and walnut shell biochar compounded adsorbent, wherein beta-cyclodextrin and chitosan are compounded, and then the beta-cyclodextrin chitosan is grafted on a walnut shell biochar substrate so as to form the complex. The preparation method comprises: compounding beta-cyclodextrin and chitosan, carrying out high temperature calcination on walnut shell biomass powder formed through air-drying and grinding so as to prepare walnut shell biochar, and compounding the beta-cyclodextrin chitosan onto the biochar surface. The application steps comprise: adding the composite material to hexavalent chromium wastewater with a hexavalent chromium concentration of 20-800 mg / L, wherein the use amount of the composite material is 0.1-1 g / L; and carrying out an oscillation adsorption reaction for a certain time at a temperature of 20-50 DEG C under a pH value of 2-9, and collecting the adsorbent through filtration or precipitation separation so as to complete the removal of the hexavalent chromium ions in the wastewater. The method of the present invention has advantages of low cost, simple process, high adsorption performance, effective waste utilization, easy separation, environmental protection, and the like.

An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.

An open mesh insect control material is described which includes an insect contact surface, an internal surface, apertures communicating both surfaces and a plurality of filamentous projections protruding from the insect contact surface the projections at least partly occlude the apertures. The structure is suitable for use in pest control especially as a mosquito net.

The invention discloses a preparation method of a filtering membrane used for an industrial air filter. The preparation method of the filtering membrane includes the following steps that 1, ceramic adhesive is prepared; 2, a sodium carboxymethylcellulose solution is prepared; 3, a composite supporting body is prepared; 4, a ceramic fiber transition layer is prepared; 5, the filtering membrane is prepared. The preparation method is simple and easy to implement, the preparation technology has high anti-fake performance, the prepared filtering membrane is uniform in structure, and has good high temperature resistance, high pressure resistance and chemical stability, filtering pressure is reduced, and the service life is prolonged.

The invention provides a production method of a graphene / ceramic composite filter membrane. The method comprises the following steps: preparing a graphene oxide solution with a certain concentration; allowing the graphene oxide solution to seep in the surface of a ceramic filter membrane and micropores of the ceramic filter membrane; and reducing a graphene oxide / ceramic filter membrane to obtain the graphene / ceramic composite filter membrane. The method allows the graphene oxide solution to seep in the micropores of the ceramic filter membrane, and avoids just adsorption of the graphene oxide solution to the surface of the ceramic filter membrane in the prior art, so the aperture dimension of the micropores in the ceramic membrane is reduced; graphene oxide is reduced into graphene, so grapene and the ceramic filter membrane are bonded through chemical bonds, and the phenomena of shedding of the graphene oxide and dissolution of the graphene in the solution are prevented; and the filtering performance of the graphene is bonded to the ceramic filter membrane, so the filtering separation effect and the mechanical strength of the graphene / ceramic composite filter membrane are improved.

Provided is an electron beam apparatus in which an electron beam emitted from an electron gun is separated by a plurality of apertures, images of said apertures are reduced in more than two stages to form multi-beams on a sample surface and to scan said sample thereby, and secondary electrons from said sample are passed through an objective lens, where distances between said secondary electrons are extended, further through an E×B separator, where said secondary electrons are separated from the primary beam, and finally onto secondary electron detectors, where said secondary electrons are detected, wherein a lens defined in the second step for reducing said image of the aperture is composed of two stage lens and an enlarged image of the secondary electron is formed on a position between a first and a second lenses of said two stage lens, thereby reducing an aberration of the optical system for detecting the secondary electrons and allowing as many multi-beams as possible to be formed in the vicinity of a single optical axis.

The embodiment of the invention discloses an array substrate. The array substrate comprises a base substrate, a first insulating layer, a plurality of touch control traces, a plurality of touch control electrode blocks, a pixel connecting part and a plurality of pixel electrodes, wherein the first insulating layer is located above the base substrate, at least one first via hole is formed in the first insulating layer, and the at least one first via hole penetrates through the first insulating layer; the touch control traces are located at the bottom part of the at least one first via hole; the touch control electrode blocks are located above the first insulating layer; at least one touch control trace is corresponding to one touch control electrode block, and the touch control electrode block is electrically connected with the at least one corresponding touch control trace; the pixel connecting part is located at the bottom part of the at least one first via hole, and the pixel connecting part is insulated from the touch control traces; the pixel electrodes are located above the first insulating layer, and the pixel electrodes are electrically connected with the pixel connecting part. According to the array substrate disclosed by the invention, the touch control traces and the pixel connecting part share the at least one first via hole; compared with the prior art, the array substrate disclosed by the invention has the advantages that the first via hole number is small, and an aperture size is relatively small, so that a region that liquid crystal molecular orientation is disordered due to the at least one first via hole is reduced, the size of a corresponding black matrix is reduced, and pixel aperture ratio is further increased.

The invention discloses a composite spinning fibre lithium ion battery diaphragm. The composite spinning fibre lithium ion battery diaphragm is prepared by the steps of: uniformly mixing and dispersing surface etched carbon nano tube dispersion liquid with 4,4'-diaminodiphenyl ether at first, after ball milling and stirring at room temperature, adding pyromellitic dianhydride, reacting with 4,4'-diaminodiphenyl ether attached on the surface of a carbon nano tube, so that the carbon nano tube is uniformly dispersed in polyamide acid solution, preparing composite spinning fibre from the mixed solution through a spinning process, and then, performing thermal imidization processing in a stepped temperature rising manner. According to the composite spinning fibre lithium ion battery diaphragm disclosed by the invention, the surface etched carbon nano tube is uniformly dispersed in a polyimide material through a ball milling-stirring process; therefore, the diaphragm material has relatively high porosity; the disadvantages that the traditional polyolefin diaphragm is low in porosity, poor in ionic conductivity and the like can be broken through; and the comprehensive performance of the lithium ion battery is improved.

A vibro-acoustical body support includes sources of audio and of low-frequency vibrational energy carried by or coupled to a chassis. The source of audio preferably includes an MP3 player and stereo speakers and / or headphones. The source of low-frequency vibrational energy includes a resonating chamber having a resonant wall provided by a diaphragm and a low-frequency transducer attached to the diaphragm that freely extends into the resonating chamber. In one presently preferred and exemplary chair topper embodiment, the chassis has an orthopedic S-shape and the diaphragm is arranged as a back supporting resonant lumbar plate.

The invention relates to a large-pore-size mesoporous carbon / silicon dioxide loaded gold nano-catalyst and a synthesis method thereof. The catalyst has a face-centered cubic ordered structure, the specific surface area is 200m<2> / g to 700<2> / g, the pore volume is 0.30cm<3> / g to 0.60cm<3> / g, the pore size is 7.0nm to 20nm, and the mass percent of Au is 0.5% to 2.5%. During preparation, the mesoporous carbon / silicon dioxide loaded gold nano-catalyst is synthesized in one step through mixing a macromolecular surfactant, which serves as a template agent, with a gold source, a carbon source and a silicon source and carrying out solvent-induced volatilization self-assembly. Compared with the prior art, the catalyst provided by the invention has the characteristics of high-ordered mesoscopic structure, adjustable pore size (7.0nm to 20nm), relatively small gold nano particle size (3nm to 5nm), adjustable gold content (0.5wt% to 2.5wt%), and the synthesis method is simple, is low in cost and facilitates the implementation of large-scale production, thereby having very good economic application prospect.

The invention discloses a preparation method of a lithium-sulfur battery anode material, and relates to the technical field of lithium-sulfur batteries. The preparation method comprises the following steps of 1 cotton dipping , wherein cotton is soaked in a hydrochloric acid solution containing zinc chloride for sealed heat preservation, the redundant solution is removed, and a mixture is dried and subjected to heat preservation treatment to obtain gray or brown solids; 2 porous carbon matrix preparing, wherein carbonization treatment and acidification treatment are conducted on the solids in sequence, and then washing, drying and calcining are conducted to obtain a porous carbon matrix; 3 carbon-sulfur composite material preparing, wherein the porous carbon matrix and elemental sulfur are heated together to synthesize the lithium-sulfur battery anode material. The invention further discloses the lithium-sulfur battery anode material prepared through the method and a lithium-sulfur battery. Compared with the prior art, the lithium-sulfur battery anode material obtained through the method has the advantages of being high in sulfur loading amount and capacity, good in cycle performance, simple in process and low in cost.

A scanner is provided with a variable aperture lens system. High resolution scans use a relatively small aperture size, and scanning speed is relatively slow. Low resolution scans use a relatively large aperture size, and scanning speed is increased. Fast scans are limited to lower sampling rates, which in turn permit more optical blurring relative to high sampling rates. Accordingly, the incremental cost of the larger aperture is minimized by permitting the lens aberrations specifications to be relaxed at larger apertures. Preferably, an electronic variable aperture is provided, for example, by use of electronically controlled polarization plates or by use of electrochromic substances.

The invention provides hydrophobic aerogel powder and a rapid preparation method thereof, and belongs to the technical field of nano-porous materials. The aerogel powder is rapidly prepared from methyltrimethoxysilane used as a precursor, water used as a solvent and a surfactant through sol-gel and normal-pressure drying. The aerogel is rapidly prepared by enhancing the strength of a gel skeleton,performing in-situ modification on the surfaces of the nanoparticles and the like, then the aerogel powder is rapidly obtained by pulverization and direct normal-pressure drying, the preparation period is short, and the application of the aerogel in the fields of heat insulation, adsorption separation and the like is facilitated.

The invention belongs to the technical field of ceramic fibers, and particularly relates to a ceramic fiber filter material and a preparation method thereof. The preparation method provided by the invention comprises the following steps: a) mixing an aluminum source, silica sol and a spinning aid, and then hydrolyzing and concentrating to obtain a spinning solution, b) carrying out fiber forming and cotton collection on the spinning solution to obtain a blank, c) filling the blank with alumina aerogel, and then needling to obtain a needled fiber blank, and d) roasting the needled fiber blank to obtain the ceramic fiber filter material. Experimental results show that the porosity of the ceramic fiber filter material prepared by the method is 90% or above, the wind erosion resistance is greater than 40 m / s, the tensile strength is greater than or equal to 0.1 MPa, and the typical dust emission quantity can be controlled within 5 mg / nm<3>.

The invention discloses a non-carbonaceous brick for an ultra-low carbon steel external refining steel ladle and a preparation method of the non-carbonaceous brick. The non-carbonaceous brick is made of aggregate, a powder material and a binding agent, wherein the aggregate is corundum of which the particle size is greater than 0.088 mm and smaller than or equal to 5 mm; the particle size of the powder material is smaller than or equal to 0.088 mm; the binding agent is a non-phosphorus binding agent consisting of organic binding agents and inorganic binding agents. The non-carbonaceous brick has the advantages that firstly, no carbon or phosphorus is used, and requirements that carbon or phosphorus is not increased to molten steel by working layer materials of a steel ladle melting tank area of low and super-low carbon steel in the external refining process, and the service life is long are met; secondly, the production efficiency of the non-carbonaceous brick is greatly improved, the production cycle is shortened, the supply capability is greatly improved, and organic combination of improvement of production efficiency and prolonging of service lives of non-carbonaceous bricks is achieved.

The invention relates to a cover plate for installing a handle in a door having opposing faces, an aperture communicating from one face to the other and first and second flanges adapted to lie on the opposing faces. Each flange has an aperture, corresponding at least in part with the aperture in the faces, and first cut-outs and optionally second cut-outs. The aperture and the cut-outs enable at least one different handle to be installed. The handle may have a backset distance of 60 mm, 70 mm, 90 mm, 95 mm or 127 mm, for example. The invention also relates to an adaptor for installing a handle in a door having an aperture communicating from one face of the door to another and cut-outs at the aperture. The adaptor is capable of changing the aperture in the door from one suitable for installing one type of handle to one suitable for installation of a different type of handle. The invention also further relates to use of the cover plate with one or more adaptors.

The invention relates to a polyamine-based or polyhydric alcohol-based suppressing agent. The suppressing agent is modified by reaction with a compound that introduces a branching group into the suppressing agent before they are reacted with an alkylene oxide. The suppressing agent shows extraordinary superfilling properties, particularly when used to fill in features having extremely small aperture sizes and / or high aspect ratios.

The invention discloses a multifunctional mouldable refractory for a submerged arc furnace and casting and a preparation method of the multifunctional mouldable refractory. The multifunctional mouldable refractory for the submerged arc furnace and casting consists of a part A and a part B, wherein the part A consists of 30-75 parts by weight of aggregates and 30-50 parts by weight of powder; and the part B comprises 12-20 parts by weight of an inorganic binding agent which is liquid. The multifunctional mouldable refractory for the submerged arc furnace and casting has the advantages that the multifunctional mouldable refractory is good in mouldable property and convenient to construct, and can be optionally formed or can repair a refractory matter working liner; chemical attack resistance is good, anti-stripping performance is good, and damage of the refractory matter working liner due to temperature shock can be resisted; and the quality guarantee period is longer than six months, the multifunctional mouldable refractory can be conveyed by a long distance, and a conveying and storing process is seldom affected by the environment temperature.

An apparatus and method for forming a cassegrain reflector antenna that allows an extended length feed horn to be employed without increasing an overall depth of the antenna. This enables the swept diameter of the antenna to be maintained at a minimum comparable to an antenna system using a standard length feed horn. The antenna system employs a hole at a vertex of the main reflector of the antenna system. The elongated feed horn is mounted at the vertex such that a major portion of its length projects outwardly form a rear surface of the main reflector. Antenna electronics components can be mounted on a neck of the feed horn or alternatively on a rear surface of the main reflector. Since the elongated feed horn does not increase the overall depth, and thus the swept arc of the antenna, the size of the radome needed to cover the antenna can be kept to a minimum size comparable to that required for reflector antennas employing conventional, standard length feed horns.

The invention provides a cross-linked covalent organic framework desalination membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: coating the surface of a base membrane having a COFs layer with an acyl chloride compound solution, carrying out a cross-linking reaction, and curing to obtain the cross-linked covalent organic framework desalination membrane. The invention also provides the cross-linked covalent organic framework desalination membrane prepared by the method. The invention further provides application of the cross-linked covalent organic framework desalination membrane in nanofiltration membranes and reverse osmosis membranes. According to the preparation method provided by the invention, the acyl chloride compound is used for carrying out in-situ crosslinking on the covalent organic framework layer, so that the rejection rate of the covalent organic framework desalination membrane on inorganic salt can be greatly improved, and the preparation method has important reference value for preparing a separable desalination membrane.

The invention discloses mesoporous bentonite and a preparation method thereof. The mesoporous bentonite is prepared through adoption of bentonite as a raw material and operation of acid-base etching,and the preparation method of the mesoporous bentonite specifically comprises the steps: mixing the bentonite with an alkali solution for alkali etching, conducting washing until neutrality, performing drying so as to obtain alkali-etched bentonite, then mixing the alkali-etched bentonite with an acid solution for acid etching, conducting washing until neutrality, and performing drying, grinding and sieving so as to obtain the mesoporous bentonite. The mesoporous bentonite has the advantages of a high specific surface area, a large pore volume, more uniform pore size distribution, environmental friendliness and the like, and exhibits better immobilization performance as a carrier for fixation, and the preparation method of the mesoporous bentonite has the advantages of a simple preparationprocess, low preparation cost, mild reaction conditions, easy operation, easy large-scale preparation and the like.

The invention provides a preparation method of an air filtering nanofiber membrane with a dendritic multilevel structure. The preparation method of the air filtering nanofiber membrane with the dendritic multilevel structure comprises the following steps of adding amino-terminated hyperbranched quaternary ammonium salt into a dimethylacetamide / acetone compound organic solvent system of polyvinylidene fluoride, magnetically stirring at a certain temperature to prepare a homogeneous spinning solution, and then preparing through electrostatic spinning. According to the preparation method of the air filtering nanofiber membrane with the dendritic multilevel structure provided by the invention, on the basis of the principle that electrostatic spinning jet flow can be split, the amino-terminated hyperbranched polymer quaternary ammonium salt with a highly branched three-dimensional structure and excellent antibacterial property is added into a spinning solution, splitting of spinning jet flow is promoted through increase of the conductivity of the spinning solution and the steric hindrance effect, and the air filtering nanofiber membrane with abundant dendritic multilevel structures is prepared by adopting an electrostatic spinning technology and a one-step method. According to the preparation method of the air filtering nanofiber membrane with the dendritic multilevel structure provided by the invention, the preparation process is simple, the dendritic structure coverage rate is high, the filtering performance is good, the antibacterial performance is excellent, and the application prospect is good.

Provided is an electrically active breathing mask. The mask contains conductive layers separated by insulating layers, the conductive layers being alternatingly positively or negatively charged. Air passing through one insulating layer is directed across the surface of a next charged layer, before flowing through a next insulating layer, and so on. Particles including virus in water vapor or sputum are evaporated as they contact alternately charged layers.

A broadband bicone antenna supports frequency selective control of electrical length. Frequency selective control of the electrical length of an antenna can provide an antenna exhibiting two or more different electrical lengths where use of each length depends upon the operating frequencies of the signals. The electrical length of the bicone antenna may be reduced in response to higher operating frequencies. Such reduction in electrical length at higher frequencies can provide improved antenna radiation patterns for the antenna. Further, the electrical length of the bicone antenna may be increased in response to low frequency operation. Such increase in electrical length may improve VSWR performance at lower frequencies. Simultaneous operation of the bicone antenna at varied electrical lengths for varied frequency bands can provide improved broadband performance of the antenna.