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Supported nanoparticle catalyst
InactiveUS20050009696A1Superior performanceImprove performanceMaterial nanotechnologyCell electrodesIridiumTungsten
A supported catalyst is provided comprising catalyst metal nanoparticles having an average particle size of 3.0 nm or less, or more typically 2.0 nm or less, and typically having a standard deviation of particle size of 0.5 nm or less, which are supported on support particles at a loading of 30% or more. Typical catalyst metals are selected from platinum, palladium, ruthenium, rhodium, iridium, osmium, molybdenum, tungsten, iron, nickel and tin. Typical support particles are carbon. A method of making a supported catalyst is provided comprising the steps of: a) providing a solution of metal chlorides of one or more catalyst metals in solvent system containing at least one polyalcohol, typically ethylene glycol containing less than 2% water; b) forming a colloidal suspension of unprotected catalyst metal nanoparticles by raising the pH of the solution, typically to a pH of 10 or higher, and heating said solution, typically to 125 ° C. or higher; c) adding support particles to the colloidal suspension; and d) depositing the unprotected catalyst metal nanoparticles on the support particles by lowering the pH of said suspension, typically to a pH of 6.5 or lower.
Owner:3M INNOVATIVE PROPERTIES CO
Conductive adhesive for LED (light emitting diode) packaging and preparation method of conductive adhesive
InactiveCN102174306ASuperior performanceGood thermal conductivityModified epoxy resin adhesivesSemiconductor devicesChemistryAdhesive
The invention discloses a conductive adhesive for LED (light emitting diode) packaging. The conductive adhesive consists of the following raw materials in percentage by weight: 75 to 95 percent of conductive powder, 2 to 12 percent of epoxy resin, 1 to 10 percent of epoxy diluting agent, 1 to 3 percent of curing agent, 0 to 1 percent of curing accelerator, and 0.5 to 2 percent of coupling agent. The LED conductive adhesive provided by the invention has superior performance and good heat conduction and electric conduction effects and can fully meet operating requirements of a high-brightness high-power LED chip.
Owner:YANTAI DARBOND TECH
Tracking filter for tuner
InactiveUS20060154636A1High linearitySuperior performanceMultiple-port networksDiscontinuous tuning for band selectionSwitched capacitorAutomatic gain control
A tuner uses a bank of tracking filters to preselect a channel to be received. Each tracking filter covers a range of frequencies. The tracking filters are tunable in frequency using switched capacitors and are tunable in gain by using switched resistors. The switched resistors can be controlled by an automatic gain control circuit that monitors the selected signal and adjust the tracking filter gain to achieve a desired signal level. A switch directs the received signal or signal from a test tone generator into the tracking filters. The test tone, generated by a frequency agile circuit, can be used to calibrate the filters, both in frequency and gain.
Owner:ENTROPIC COMM INC
Transmitter, receiver and method for controlling multiple input multiple output system
InactiveUS20090252247A1Increase channel capacitySuperior performancePower managementMultiplex communicationData transmissionTransmission rate
Provided is a method of controlling a multiple input multiple output (MIMO) system. One embodiment of the method includes the steps of: estimating, at a receiver, a MIMO channel and detecting data streams using a successive interference cancellation scheme; calculating, at the receiver, S and P using the estimated channel and then feeding back information corresponding to (P1, P2, . . . , PM-1, SINR5M) to a transmitter, and determining, at the transmitter, a transfer rate and transmission power perstream using the fed-back information. Another embodiment of the method includes the steps of: estimating, at a receiver, a MIMO channel and detecting data streams using a signal received from an antenna; extracting, at the receiver, a feedback parameter to be fed back to the transmitter using the estimated channel, and feeding back the feedback parameter to the transmitter, and determining, at the transmitter, a stream to be allocated to the receiver from among the streams of the transmitter using the fed-back parameter and a data transfer rate per stream, wherein the feedback parameter is information corresponding to a successive interference cancellation order and a signal-to-interference-plus-noise ratio (SINR) per stream reflecting successive interference cancellation.
Owner:ELECTRONICS & TELECOMM RES INST
Ultraviolet light emitting diode package
ActiveUS20100072506A1Superior performanceMinimize deterioration in performance and lifespanSolid-state devicesSemiconductor devicesUltraviolet lightsLength wave
An ultraviolet light emitting diode package for emitting ultraviolet light is disclosed. The ultraviolet light emitting diode package comprises an LED chip emitting light with a peak wavelength of 350 nm or less, and a protective member provided so that surroundings of the LED chip is covered to protect the LED chip, the protective member having a non-yellowing property to energy from the LED chip.
Owner:SEOUL VIOSYS CO LTD
Light compound side fascia and its manufacturing method
ActiveCN1831270AReasonable structureSuperior performanceConstruction materialMouldsRebarHigh intensity
The invention relates to a lightweight compounded outer wallboard and the manufacturing method thereof. And it is compounded of fiber or wire fabric reinforced cement slab and bearing layer, where the bearing layer is made of reinforcing fabric reinforced light aggregate concrete, one or two sides of the bearing layer are combined with cement slabs and a cavity in the bearing layer is enveloped by light aggregate concrete and full of heat insulator. And its manufacturing method comprises a process as follows: A. placing cement slabs on one or two sides in a die space; B. placing reinforcing fabric provided with heat insulator in the middle by the cement slabs in the die space; C. pouring light aggregate concrete in the die space to bury the reinforcing fabric; and D. staying, curing and hardening and then demoulding to make it. And the method is simple, practical, high-efficiency and it has advantages of lightweight, high intensity, strong bearing capacity, good heat insulating property, seismic resistance, seepage prevention, etc.
Owner:广州益群板业有限公司
Processing of biocompatible coating on polymeric implants
ActiveUS20100016985A1Rapid osteointegrationSuperior performanceDental implantsImpression capsPolymer substrateCalcium biphosphate
The present invention provides polymeric substrates comprising a biocompatible coating and methods of preparation thereof. In particular, the coating may be a ceramic material, especially a calcium phosphate material, which may be functionally graded. The invention provides the ability to apply high quality coatings to polymeric substrates without damaging the substrate (e.g., melting the polymeric material). The functionally graded coating can provide crystalline calcium phosphate near the coating interface with the substrate and provide amorphous calcium phosphate at the outer surface of the coating.
Owner:NORTH CAROLINA STATE UNIV
Stirrup-Type Power Utility Electrical Connector Assemblies
InactiveUS20080050987A1Lower costSuperior performanceElectric connection structural associationsClamped/spring connectionsMechanical engineeringPower utility
An electrical connector assembly includes a bail, a first conductive member having a first hook portion extending from a first wedge portion, wherein the first hook portion adapted to engage a main conductor, and a second conductive member having a second hook portion extending from a second wedge portion. The second hook portion is adapted to engage the bail. The first wedge portion and the second wedge portion are adapted to nest with one another and be secured to one another to capture and electrically connect the main conductor and the bail.
Owner:TYCO ELECTRONICS CANADA +1
Power semiconductor module and method of manufacturing the same
ActiveUS20110012252A1Heat dissipation performance be improveSuperior performanceSemiconductor/solid-state device detailsSolid-state devicesAnodic oxidationSemiconductor
Disclosed herein is a power semiconductor module. The module includes metal plates each having a first through hole, with an anodic oxidation layer formed on a surface of metal plates and an interior of the first through hole. A cooling member has a second through hole at a position corresponding to the first through hole, and the metal plates are attached to both sides of the cooling member. A circuit layer is formed on the anodic oxidation layer and performs an interlayer connection through a via formed in the first and second through holes. A power device is connected to the circuit layer. A resin encapsulant encloses the circuit layer and the power device. A housing is installed to each of the metal plates to form a sealing space for the resin encapsulant.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
Preparation method of novel environment-friendly phosphite ester antioxidant
InactiveCN102718796AHigh puritySuperior performanceGroup 5/15 element organic compoundsCardanolAnoxomer
The invention relates to a novel environment-friendly phosphite ester antioxidant, wherein a preparation of the novel environment-friendly phosphite ester antioxidant comprises the following steps of: taking cashew nut shell oil extractive such as anacardol or hydrogenated cashew phenol and phosphorus trichloride as raw materials, and reacting according to the molar ratio of the anacardol or the hydrogenated cashew phenol to the phosphorus trichloride of (3.0:1.0)-(3.5:1.0) to prepare a liquid phosphite ester antioxidant product without a solvent and a catalyst. The preparation method is simple in technology, the raw materials are low in price and easy to obtain, the antioxidant tris-(nonyl phenol) phosphite ester (TNPP) can be replaced by the synthesized product to be taken as the antioxidant and the stabilizing agent in the fields such as nature rubber, synthetic rubber, emulsion, plastic and the like, so that the phosphite ester antioxidant not only is better in emulsification performance, hydrolysis resistance and thermal stability performance compared with the TNPP, but also has the characteristics of being low in price and environment-friendly, thereby according with the future development tendency of the antioxidant, and the antioxidant which is synthesized by taking the anacardol as the raw material is the reaction type antioxidant having double bonds.
Owner:NANXIONG ZHIYI FINE CHEM
Preparation method of indoor flatting powder paint
InactiveCN102850913AEasy material selectionSuperior performancePowdery paintsEpoxy resin coatingsChemistryOrganic acid
The invention relates to a preparation method of indoor flatting powder paint, which is characterized by comprising the following steps: adding polybasic acid or acid anhydride, polyalcohol, catalyst and antioxidant into a reaction kettle, mixing, introducing nitrogen, heating to carry out esterification reaction or ester exchange reaction until the reaction liquid is completely clear, carrying out vacuum polycondensation until the acid value is 40-200mg KOH / g and the viscosity is 10-50 poise, cooling, and discharging to obtain the light yellow transparent or semitransparent solid component A polyester resin; adding polybasic acid or acid anhydride, polyalcohol, catalyst and antioxidant into a reaction kettle, mixing, introducing nitrogen, heating to carry out esterification reaction or ester exchange reaction until the reaction liquid is completely clear, carrying out vacuum polycondensation until the acid value is 10-50mg KOH / g and the viscosity is 30-100 poise, cooling, and discharging to obtain the light yellow transparent or semitransparent solid component B polyester resin, wherein the molecular weight of the component A polyester resin and the component B polyester resin are respectively controlled at 1000-10000 dalton; evenly mixing the component A polyester resin, component B polyester resin and polybasic organic acid to obtain a component C polyester resin; and mixing the component C polyester resin, epoxy resin E-12, barium sulfate, titanium white, leveling agent, brightener, physical flatting agent and benzoin to obtain the indoor flatting powder paint. The synthesis method has the advantages of diversity and the like, and can easily implement industrialized mass production.
Owner:广东大盈新材料科技有限公司 +1
Geopolymer chemically-bonded ceramic tile and preparation method thereof
ActiveCN105236933ALow costSuperior performanceCeramic materials productionClaywaresBuilding materialCeramic tiles
The invention relates to a geopolymer chemically-bonded ceramic tile and a preparation method thereof. The geopolymer chemically-bonded ceramic tile is prepared from solid wastes like fly ash, filtered steel and copper slag, and industrial-grade chemical raw materials. The unburned ceramic tile is prepared from, by mass, 60 to 75% of the solid wastes, 19 to 38% of a liquid activator, 1 to 3% of a base-material additive and 1 to 3% of a compound liquid additive by procedures like mixing, sieving and granulating. Due to implementation of a firing-free process, energy conversation and consumption reduction can be realized; pollution is reduced; meanwhile, performances of the geopolymer chemically-bonded ceramic tile can reach national standards of fired ceramic tiles. The geopolymer ceramic tile does not need to introduce calcined kaolin, and after 12 to 48 hours of easy and practicable special maintenance, a ceramic bonded three-dimensional network body is rapidly formed, so the ceramic tile reaches and is superior in a part of performances to the 60-day-age level of similar geopolymer materials; limited mineral resources are not consumed; and energy consumption of calcination is avoided. The geopolymer chemically-bonded ceramic tile provided by the invention can change wastes into treasures, significantly saves energy and reduces consumption, can be used as a novel building material and has extensive application prospects.
Owner:JINGDEZHEN CERAMIC INSTITUTE
High fused mass strength compound isolating film and preparation method and application thereof
InactiveCN101222034ASuperior performanceImprove securityCell component detailsMembrane rupturingPolyolefin
The invention relates to a battery polyolefin isolating membrane. The composite isolating film with high fused mass strength of the invention is a microporous membrane which takes the structure of B / A two-layer or B / A / B three-layer, wherein, A layer is a copolymer membrane of polyethylene or ethylene and 5 to 50 percent other olefins or a mixture membrane of the polyethylene or the ethylene and the 5 to 50 percent other olefins, and B layer is a copolymer membrane of propylene and 0.1 to 10 percent other olefins. The invention has the advantages that: a polymer A which provides low obturator temperature and a polymer B which provides high membrane rupture temperature and high fused mass strength are led in a formulation for preparation of the polyolefin composite microporous isolating membrane, thereby the isolating membrane with low obturator temperature, high membrane rupture temperature, high fused mass strength and high use safety is obtained.
Owner:SHENZHEN SENIOR TECH MATERIAL
Thermal spray coatings and applications therefor
ActiveUS20080199722A1Long cycle lifeSuperior performanceMolten spray coatingSpecial ornamental structuresYttriumYb element
This invention relates to coatings for a metal or non-metal substrate comprising (i) a thermal sprayed bondcoat layer applied to said substrate comprising an alloy of MCrAlM′ wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M′ is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof, and wherein M comprises from about 35 to about 80 weight percent of said alloy, Cr comprises from about 15 to about 45 weight percent of said alloy, Al comprises from about 5 to about 30 weight percent of said alloy, and M′ comprises from about 0.01 to about 1.0 weight percent of said alloy, said alloy thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 100 microns, said bondcoat having a surface roughness of at least 200 micro-inches, and said bondcoat having a thermal expansion of about 6.5 millimeters per meter or less between a temperature of from about 25° C. to about 525° C., and (ii) a thermal sprayed ceramic layer applied to said bondcoat layer; wherein said coating has a helium leak rate of less than 6×10−6 standard cubic centimeters per second. The coatings are useful for extending the service life under severe conditions, such as those associated with metallurgical vessels' lances, nozzles and tuyeres.
Owner:PRAXAIR ST TECH INC
Method for preparing plumbum containing radiation protection organic glass
The invention relates to a method for preparing lead-bearing radiation-proof organic glass, belonging to the functional high molecular material polymerization technical field. The method synthesizes organic carboxylic acid lead salt through organic synthesis and modification of inorganic lead salt, adds the organic carboxylic acid lead salt into water-in-oil type microemulsion which consists of methyl methacrylate (MMA), a surfactant, an auxiliary surfactant, water and so on, initiates under the condition of a thermal initiator and polymerizes an organic glass sheet. Moreover, the performance of the organic glass sheet is tested, and the result reveals that the impact strength, the tensile strength, the light transmittance, the refractive index, the glass transition temperature and the radiation-proof property of the organic glass prepared by polymerization of the microemulsion are all superior to those of common organic glass. The invention provides a novel method for synthesizing functional high molecular materials. The method has a simple and convenient technique; the synthesized sheet has superior performance, can make up for the defects of an inorganic radiation-proof glass sheet, and is hopeful to become practical novel radiation-proof materials.
Owner:JIANGNAN UNIV
Preparation method for synthesizing ultra-thin metal alloy nanosheet array material by means of hydrotalcite topological transformation
ActiveCN106917106ASuperior performanceHigh specific surface areaLiquid/solution decomposition chemical coatingElectrodesHydrotalciteEthylene glycol
The invention discloses a preparation method for synthesizing an ultra-thin metal alloy nanosheet array material by means of hydrotalcite topological transformation, and belongs to the technical field of inorganic advanced nano materials. The preparation method includes the steps that a vertical hydrotalcite nanosheet array is prepared on the surface of a conductive foam substrate; an ethylene glycol solution of sodium hydroxide is used for reducing the hydrotalcite nanosheet array so that a metal alloy nanosheet array can be prepared; and according to the dimensions of alloy nanosheets, the thickness is 1.5-4 nanometers, and the size is 100-800 nanometers. The hydrotalcite nanosheet array can be prepared through a hydrothermal method, the alloy nanosheet array is prepared through the mild homogeneous-phase reduction hydrotalcite nano array by controlling dynamics reaction steps. The alloy nanosheet array prepared through the method is high in specific surface area, good in stability, high in activity, low in price and capable of being used as (including but not limited to) an electrolyzed water hydrogen evolution cathode catalytic material and an electrolyzed water oxygen evolution anode catalytic material.
Owner:BEIJING UNIV OF CHEM TECH
Laminating device and integrated die laminating device
PendingCN110492181AQuality improvementReduce defective rateFinal product manufactureSecondary cellsUltimate tensile strengthMechanical engineering
Owner:哈工大机器人(中山)无人装备与人工智能研究院
Autorotation type soilless planting greenhouse capable of acquiring natural energy in multiple directions
InactiveCN102668965ASuperior performanceEasy to useClimate change adaptationAgriculture gas emission reductionTurbofanGreenhouse
The invention relates to an autorotation type soilless planting greenhouse capable of acquiring natural energy in multiple directions. A base and water pool part has a disc-shaped masonry and cement structure which is constructed under the ground level and has an upward opening; a plurality of rail supports are arranged at the periphery of the structure; an annular rail is erected on the rail supports; a transparent inflated outer cover part is located on the annular rail through rollers which are arranged at the periphery of the bottom of the transparent inflated outer cover part and an autorotation driving mechanism; an energy acquisition device comprises a hot airflow turbofan power generation device which is arranged on the top of the transparent inflated outer cover part, a solar heat collection device, and geothermal pipes which are arranged in a water pool; and a three-dimensional planting frame part is arranged in internal space of a transparent inflated outer cover. The ground temperature, sunlight and hot airflow power generation produced by the transparent inflated outer cover are acquired by using the water pool and the geothermal pipes; the solar heat collection device acquires, stores and releases heat energy to regulate and control the atmospheric temperature in the greenhouse; and the autorotation motion of the greenhouse is driven by the electric power generated by the greenhouse so as to finish the circulation of a nutrient solution, lighting and ultrasonic spraying.
Owner:毕一凡 +1
Method for realizing distributed Luby transform (LT) codes on the basis of layering network topology
The invention discloses a method for realizing distributed Luby transform (LT) codes on the basis of the layering network topology, comprising the following steps: (1) a source terminal broadcasts k data packets to each base station; (2) each base station randomly selects one data packet to broadcast to each first layer of relay node; (3) each first layer of relay node randomly selects a received data packet: if the new data packet is received before or cache is full, the new data packet is abandoned, and otherwise the new data packet is stored in the cache; (4) when the cache of each first layer of relay node is provided with R or more than R data packets, each first layer of relay node randomly selects d data packets exclusive OR, exclusive OR data packets are broadcasted to each second layer of relay node, and meanwhile d data packets are deleted from the cache; (5) each second layer of relay node randomly selects two data packets exclusive OR or sends one of data packets exclusive OR to a receiving end; (6) the receiving end is used for decoding the received data packet; if the process of decoding succeeds, the process of coding ends; and otherwise, the whole process restarts from step (2).
Owner:ZHEJIANG UNIV
Epoxy resin microcapsule latent curing agent and preparation method thereof
InactiveCN102391472ASuperior performanceSimple and efficient operationMacromolecular adhesive additivesMicroballoon preparationChemistryEthyl cellulose
The invention relates to an epoxy resin latent curing agent, in particular to an epoxy resin microcapsule latent curing agent synthesized from acrylic modified resin and a preparation method thereof. The epoxy resin microcapsule latent curing agent is prepared from the following raw materials in percentage by weight: 10-30 percent of addition compound, 50-80 percent of cyclohexane, 0.5-1.5 percent of ethyl cellulose, 1-10 percent of dispersant and 0.5-1.5 percent of release agent. The quality guarantee period of an adhesive which is prepared from the epoxy resin microcapsule latent curing agent and the epoxy resin is more than 15 days at the temperature of 40 DEG C, the binding strength reaches over 10Mpa, and the elongation at break is 8-15 percent; and the adhesive can be widely appliedto adhesion of electronic elements in electronic industry, adhesion of plastic and furniture and the like.
Owner:JIAOZUO ZHUOLI STAMPING MATERIAL CO., LTD.
Three-dimensional matching coordination filtering image de-noising method
ActiveCN108932699ASuperior performanceReasonable computing speedImage enhancementImage analysisSignal-to-noise ratio (imaging)Peak value
The invention discloses a three-dimensional matching coordination filtering image de-noising method based on a transforming domain. The method comprises the following steps of 1, performing gray scaleconversion on an acquired image and performing noising processing; 2, obtaining pre-estimated data of the image by means of three-dimensional matching filtering; 3, performing wavelet decomposition conversion for extracting a high-frequency part in the pre-estimated image obtained in the step 2 and performing filtering, for avoiding edge fuzzy, introducing a Laplace Gaussian algorithm for constructing a new operator and introducing into a diffusion model, and finally performing wavelet reconstruction for obtaining final approximation of the original image; and 4, detecting the edge through the Canny operator and calculating the peak value signal-to-noise ratio and structure similarity of each model for analyzing the effectiveness and feasibility of the method. The three-dimensional matching coordination filtering image de-noising method has advantages of excellent performance, whole inner information protection, reasonable operation speed and benefit for actual application.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Digital camera accommodating recording media from other digital cameras
InactiveUS7292273B2Superior performanceImprove performanceTelevision system detailsColor television signals processingImage resolutionImage based
A signal recording / reproducing apparatus includes a CCD imager. The still image taken by said CCD imager is recorded, together with resolution information, on a recording medium. The recording medium is recorded, together with resolution information, is a still image taken by said digital camera and having a higher resolution than said CCD imager. When a still image is reproduced from said recording medium and displayed on a monitor, a video encoder converts the resolution of a reproduced still image based on resolution information. The converted resolution agrees with a resolution of the monitor. As a result, a reproduced still image is properly displayed on the monitor.
Owner:XACTI CORP
Method of measuring the performance of a prosthetic foot
ActiveUS20060058893A1Superior performanceForce measurementLigamentsPhysical medicine and rehabilitationProsthetic feet
Owner:OSSUR HF
Method of Producing Amorphous Aluminum Silicate, Amorphous Aluminum Silicate Obtained with said Method, and Adsorbent using the same
ActiveUS20110189070A1Superior water vapor adsorption performanceSuperior performancePhysical/chemical process catalystsAluminium silicatesAluminium saltsSorbent
The present invention aims to provide an adsorbent with superior adsorption performance of 20 wt % or more in a humidity range of 5 to 60 wt % by using a low-cost reagent as the raw material. Aluminum sulfate is used as the Al source, the respective aqueous solutions are mixed to achieve a Si / Al molar ratio of 0.70 to 1.0 in the mixed solution, the pH is adjusted to be 6 to 9 with acid or alkali, the solution is heated at 90 to 110° C. and subsequently subject to desalination treatment in order to synthesize an amorphous aluminum silicate. The obtained amorphous aluminum silicate yields a superior water vapor adsorption performance of 20 wt % or more in a relative humidity of 60%, and can be used as an adsorbent for desiccant air conditioning and as other adsorbents.
Owner:NAT INST OF ADVANCED IND SCI & TECH
Baking varnish composition
InactiveCN101210150ASuperior performanceGood social and economic benefitsPolyester coatingsSolventChemistry
The invention relates to a baking varnish composition, main components of which by weight percentage are: saturated polyester resin: 64-70, isobutyl ether melamine formaldehyde resin: 20-28, epoxy resin: 0-10, flatting agent: 0-0.01, solvent: 6-7.6 and silane coupling agent: 0-1. The formulation is that cross linking reaction happens on the condition that the saturated polyester resin is matched with the isobutyl ether melamine formaldehyde resin with a small amount of epoxy resin and a little silane coupling agent added to form film with excellent adhesion and materialization. The baking varnish composition can be directly coated on the surface of nylon and glass fiber free from pretreatment, has very strong corrosion resistance and is environmental-protection and nonhazardous. The paint layer generated after coated on the surface of nylon and glass fiber has strong adhesion.
Owner:MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
Ship satellite television receiver
InactiveCN101938608ASuperior performanceLow costTelevision system detailsBeacon systems using radio wavesInertial measurement unitSatellite television
The invention provides a ship satellite television receiver comprising an antenna shield, an antenna element, a three-axis stabilized servo bracket, a servo drive and control unit, an inertial measurement unit, a satellite beacon receiving unit, a GPS (Global Positioning System) signal receiving unit and a television signal demodulating unit, wherein the three-axis stabilized servo bracket and the antenna element are arranged in the antenna shield, the antenna element is used for introducing a signal to the television signal demodulating unit through a communication interface arranged on the antenna shield, and the satellite beacon receiving unit, the servo drive and control unit and the inertial measurement unit are arranged on the three-axis stabilized servo bracket. The ship satellite television receiver has the advantages of high performance and lower cost and can help ships navigating on rivers lakes and seas to realize a satellite television receiving function.
Owner:SHANGHAI YONGXING BUSINESS INFORMATION CONSULTINGCO
Preparation method of low-hydroxymethyl melamine formaldehyde resin
The invention relates to the technical field of a preparation process of melamine formaldehyde resin, in particular to a preparation method of low-hydroxymethyl melamine formaldehyde resin. The preparation method comprises the following steps: mixing melamine and an aqueous solution of formaldehyde in the way that the ratio of the melamine to the aqueous solution of formaldehyde is (9 to 15):(20 to 35) in part by weight, regulating the pH to the range from 7.5 to 8.5 by an NaOH solution, heating and warming to the temperature of 70 to 90 DEG C and performing the thermal reaction for 120 to 180 minutes; after the reaction is finished, cooling to the temperature of 45 to 55 DEG C and adding water according to the fact that the ratio of melamine to water is (9 to 15):(5 to 10) in part by weight; filtering so as to obtain the resin finished product. Through the regulation on raw material components in the process steps, the addition sequence of the components, time, the ratio of the components in part by weight, reaction parameters in the technical process and the like and the mutual coordination effect of factors, the low-hydroxymethyl melamine formaldehyde resin, which has high stability and superior performance, is low in cost and price, and adopts the simple preparation method, is obtained.
Owner:SHANDONG ZHANHUA OSITER CHEM
Construction method for enhancing structural strength of joint cement concrete pavement
InactiveCN103526678AExcellent structural strengthSuperior performanceRoads maintainenceHeavy trafficBituminous concrete
The invention discloses a construction method for enhancing the structural strength of a joint cement concrete pavement. The method comprises the steps that an unstable pavement plate which is poor in joint load transmission capacity and large in deflection value is repaired, the mode that a paving layer is directly added on combined type continuous reinforcement concrete is used, a pulling rod is arranged on the horizontal joint corresponding to an existing pavement, and a specially-designed pulling rod is arranged on the longitudinal joint. Pulling rod connecting openings which are specially designed are arranged at the two ends of the paving layer in advance, bituminous concrete is used as a transition section, and convenience is provided for paving layer construction at the nest stage. The pavement repairing technology can be used on a heavy traffic and joint cement concrete pavement distress section, heavy traffic load resisting capacity is achieved, the service life of the pavement is prolonged, and early distress is prevented. Meanwhile, good durability and economy are achieved.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Strain insulator string for multi-division transmission line
InactiveCN102163827AReduce workloadSuperior performanceSuspension arrangements for electric cablesSuspension/strain insulatorsWorking capacityTransmission line
The invention provides a strain insulator string for a multi-division transmission line, belonging to the technical field of multi-division overhead transmission lines. The string comprises a first group of U-shaped hanging rings, a second group of U-shaped hanging rings of a towing plate, a first dual-yoke plate, a first right-angle hanging plate, a ball head hanging ring, an insulator, a bowl head hanging plate, a ladder-shaped four- hole yoke plate, an extended pull rod, a second right-angle hanging plate, a second dual-yoke plate, a third dual-yoke plate, six groups of hardware strings and six sub-wires, which are mutually connected in sequence. The strain insulator string is applied to the places at the altitude of 3000m and below. Compared with the prior art, the strain insulator string has high reliability and can reduce the working capacity of construction and maintenance; performances of the strain insulator string are good, the corona voltage of the strain insulator string goes beyond the requirement of the 3000m altitude, and the electrical loss of line operation is less; and the problem that a shading ring is touched by the wires does not exist, and the problem of wire abrasion can be solved completely.
Owner:江苏捷凯电力器材有限公司 +2
Selective filtration of cigarette smoke using chitosan derivatives
InactiveUS20050247323A1Superior performanceImprove performanceTobacco treatmentTobacco smoke filtersChitosan derivativeAldehyde
A smoking article filter having a porous resin with a high surface area to mass ratio comprised of a chitosan derivative. Preferred embodiments include chitosan cross-linked with glutaraldehyde and chitosan cross-linked with glyoxal. The chitosan derivative provides for the selective filtration of cigarette smoke, particularly for the removal of aldehydes, hydrogen cyanide, heavy metals and carbonyls.
Owner:R J REYNOLDS TOBACCO COMPANY
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