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201results about How to "Intensity adjustment" patented technology

Multifunctional quick repair material for cement concrete pavements and preparation method thereof

The invention relates to pavement repair, particularly a multifunctional quick repair material for cement concrete pavements, which is prepared by mixing the following raw materials in percentage by weight: 20-30% of magnesium oxide, 14-26% of ammonium monoacid phosphate, 9-14% of boric acid, 5-20% of aluminate cement, 2-10% of fly ash, 2-10% of rubber powder, 0.5-1.5% of polypropylene fiber, 0.5-1.5% of redispersible latex powder, silica sol and water; the silica sol accounts for 20-60% of the water. The preparation method of the multifunctional quick repair material for cement concrete pavements is implemented by proportionally mixing the raw materials. The material is convenient for construction, has enduring effect after curing, and has quick and enduring repair capacities for most damage forms of cement concrete pavements.
Owner:SHANGHAI JIANWEI CULTURAL HERITAGE CONSERVATION TECH CO LTD

Wireless charging method, device and system

The invention relates to the field of television application, and discloses a wireless charging method, device and system. The wireless charging device is in communication connection with at least one device to be charged, basic information of the device to be charged is received through communication connection, power supply parameters corresponding to the device to be charged are calculated according to the basic information of the device to be charged, and a charging magnetic field is emitted according to the power supply parameters to charge the device to be charged. Adjustment of charging field intensity, charging frequency and the direction of the magnetic field is achieved, and multiple types of devices can be charged.
Owner:TIANJIN SAMSUNG ELECTRONICS CO LTD +1

Adaptive filtering method, adaptive filter and noise control system

The invention discloses an adaptive filtering method, an adaptive filter and a noise control system. The noise control system comprises a primary sensor, an error sensor, a secondary sound source andan adaptive filter. The self-adaptive filter comprises a self-adaptive filtering unit and a weight coefficient updating unit. The self-adaptive filtering method comprises the steps that a self-adaptive filter receives a reference signal and obtains an output signal according to the reference signal and a filter weight coefficient so as to drive a loudspeaker to generate a secondary noise signal; And a convergence step length of a preset algorithm is calculated according to the reference signal and the error signal sent by the error sensor, and a filter weight coefficient is updated by using the reference signal, the error signal and the preset algorithm for determining the convergence step length to adjust the intensity of the secondary noise signal until the error signal reaches a presetthreshold value. According to the method, the algorithm can be stably and quickly converged in a background environment with large noise signal energy change, and the noise reduction effect of the system is improved.
Owner:GOERTEK INC

Compound curing agent of high cement slurry

The invention relates to a compound type slurry curing agent for conducting curing treatment on waste slurry generated in geotechnical engineering (for example, investigation drilling, cast-in-place pile, anchorage engineering, trenchless construction and the like), as well as the sludge at the bottom of reservoirs, ditches, ponds, pools and the like. In the invention, the compound type slurry curing agent is prepared by adding and mixing fine sand, lime, industrial waste gypsum, fly ash and super absorbent resin in cement curing agent evenly according to a certain proportion. The slurry curing agent greatly improves the curing effect of slurry, reduces the use amount of cement and lowers the cost. Besides, by doping industrial wastes such as waste gypsum, fly ash and the like in cement, the pollution to the environment is abated, the recycle of wastes is promoted and favorable economic and social benefits are available.
Owner:WENZHOU UNIVERSITY

Metal and ceramic bonding agent and preparation method of metal and ceramic bonding agent, CBN grinding wheel and manufacturing method of CBN grinding wheel

The invention discloses a metal and ceramic bonding agent and a preparation method of the metal and ceramic bonding agent, a CBN grinding wheel and a manufacturing method of the CBN grinding wheel. The metal and ceramic bonding agent is composed of, by mass fraction, 75%-92% of ceramic and 8%-25% of metal. The ceramic is composed of, by mass fraction, 40%-65% of SiO2, 8%-35% of B2O3, 6%-20% of Al2O3, 5%-18% of Na2O5, 0.5%-5% of CaO, 3%-10% K2O, 0.5%-2% of MgO and 2%-6% of TiO2. The metal is composed of, by mass fraction, 55%-80% of Cu, 15%-30% of Sn and 5%-20% of Ni. The metal and ceramic bonding agent can be used as a CBN grinding wheel bonding agent and overcomes the defects that in the grinding process of the ceramic CBN grinding wheel, the surface roughness of a workpiece is large, chatter marks are generated easily, and impact resistance is poor.
Owner:白鸽磨料磨具有限公司

Surface modification glass fiber and preparation method and application thereof

The invention relates to a surface modification glass fiber and a preparation method and an application thereof, and belongs to the fields of surface modification fibers and preparation thereof. The preparation method is characterized in that the copolymer solution is adopted to be coated on the surface of the pre-processed glass fiber, wherein the copolymer used in the method comprises dodecyl methacrylate, styrene, and maleic anhydride; and the glass fiber is pre-processed by a coupling agent KH550. The surface modification glass fiber, provided by the invention, has the advantages that the preparation process is simple; the cost is low; the industrialization is facilitated; the dispersing performance and the heat stability of the modification glass fiber are good after the preparation method; and the surface modification glass fiber can be well bonded with thermoplastic resin.
Owner:DALIAN UNIV

Combined type magnetron sputtering cathode

The invention relates to a combined type magnetron sputtering cathode which is formed by a plane target material (1), a water cooling back plate (2), outer permanent magnets (3 and 4), an inner permanent magnet (5), inner electromagnetic coils (6 and 7), outer electromagnetic coils (8 and 9), outer yokes (10 and 11), an inner yoke (12), middle yokes (13 and 14), a bottom yoke (15) and a frame (16). A closed coil is formed by the two inner electromagnetic coils (6 and 7), and a closed coil is formed by the two outer electromagnetic coils (8 and 9). The inner electromagnetic coils and the outerelectromagnetic coils are connected to an external power supply through leads. By adjusting the magnitude and the direction of current in the inner electromagnetic coils and the outer electromagneticcoils, changes of magnetic field intensity and distribution on the surface of the magnetron sputtering cathode are achieved, the sputtering speed, the magnetic field unbalance degree are adjusted, andthe target material using rate is increased.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

Novel micro multi-functional acupoint massage probe

The invention provides a novel micro multi-functional acupoint massage probe with a high integration degree. The probe comprises a shell, a gear wheel, a rack, a massage head, an electronic probe, a probe spring, a massage head spring, a control panel, a prompter, a prompt lamp and so forth, wherein the gear wheel, the rack, the probe spring, the massage spring, the control panel, an elastic conductive electrode, a massage motor, a motor, a rotatable slide conductive electrode and an eccentric rotation block are installed in the shell. The acupoint massage probe provided by the invention is characterized in that the rack, the massage head, the electronic probe, the probe spring, the control panel, the prompter, the prompt lamp, the elastic conductive electrode and so forth are highly and skillfully integrated. The massage probe has the advantages that the structure is simple and compact; the cost is low; the whole system has ultrahigh operational stability, an ultra-long service life, and high manufacture convenience; and because of the compact structure, multiple functions of detection, massage, acupressure, beating, acupuncture and moxibustion, thermal therapy and the like can be integrated on the same massage head easily, and the functions can be implemented in a full-automatic manner.
Owner:TIANJIN BOZHONG ELECTRONICS

Environmental-friendly tourmaline composite home decoration material and preparation method thereof

ActiveCN104386982AChanging the Potential Threat QuestionPlay the environmentSolid waste managementOxygen ionsFar infrared
The invention discloses an environmental-friendly tourmaline composite home decoration material. The environmental-friendly tourmaline composite home decoration material comprises the following raw materials in parts by weight: 2-20 parts of tourmaline powder, 20-80 parts of slag, 2-10 parts of activated carbon, 5-40 parts of a binding agent, 1-40 parts of an accessory and 0.1-0.3 part of an air entraining agent. The invention further discloses a preparation method of the material. By mainly utilizing various excellent characteristics of tourmaline, the prepared home decoration material has functions of releasing negative oxygen ions and emitting a far infrared ray, the problem of potential threats to a human body caused by an existing home decoration material is greatly changed, a great number of negative oxygen ions can be released, formaldehyde, peculiar smells and the like can be absorbed, dust and other small molecule compounds in air can be adsorbed, and the effects of purifying indoor environment and killing and inhibiting bacteria are achieved; moreover, a main body part is prepared by using the flag and Portland cement, and the material is low in price, easy to obtain, high in mechanical strength, light in weight, reusable, wide in application prospect and suitable for popularization and application.
Owner:CHENGDU SHANGKE KITCHEN EQUIP

Light-emitting diode packaging module

The invention relates to a LED package module, comprising a substrate, a first LED and an electric crystal, where the first LED is arranged on the substrate, and the electric crystal is connected with the first LED and arranged on the substrate to control on-off of the first LED, and the first LED and the electric crystal are located in the same package body. Thus, as compared with the existing techniques, it can reduce the cost of package manufacturing process.
Owner:GIGNO TECH CO LTD

Method and apparatus for continuous preparation of carbon nanometer tube material from coal

The present invention belongs to the field of coal chemical technology, plasma material science and carbon material technology. The present invention features that powdered coal and high temperature water vapor are sprayed directly into arc plasma to prepare carbon nanotube material continuously. That is, carbon nanotube material is prepared continuously by means of high temperature and arc plasma with high activity particle as medium. The arc plasma has work gas nitrogen and is rotated by means of outer magnetic field. The preparation apparatus consists of water vapor generating and supplying system, coal powder conveying system, plasma generator, product collector, gas cooling and purifying system, explosion-proof unit and pressure regulating system.
Owner:DALIAN UNIV OF TECH

Low-cost quick-setting expansible hole-sealing material applied to coal mine

The invention discloses a low-cost quick-setting expansible hole-sealing material applied to coal mine. The low-cost quick-setting expansible hole-sealing material applied to the coal mine is prepared from the following raw materials: 30-50 parts of coal gasification fine ash, 25-35 parts of sulpho aluminate cement, 0.04-0.15 part of citric acid, 5-10 parts of quick lime, 20-25 parts of gypsum and 2-3 parts of sodium hydroxide. The low-cost quick-setting expansible hole-sealing material applied to coal mine has the advantages that a large amount of coal gasification fine ash which is industrial solid waste (the waste of coal chemical industry) is added into the raw materials, and the waste is utilized and is changed into wealth; the cost of the hole-sealing material is greatly reduced to 600 RMB per ton under the condition that the strength and expansion rate meet the requirements. The hole-sealing material is innocuous, unpoisonous and pollution-free, can be used for sealing holes in gas drainage of the coal mine and can also be used for sealing holes, opening sealing and blocking leakage air during post-grouting and reinforcing of walls of coal mine laneways; the large amount of the coal gasification fine ash is added into the raw materials, so that the hole-sealing material has obvious environmental protection significance; an important thinking is provided for clean production in the coal chemical industry.
Owner:HENAN INST OF ENG

Monitoring camera for security monitoring and security protection

The invention discloses a monitoring camera for security monitoring and security protection, and relates to the technical field of monitoring cameras. The invention aims to solve the problems that a sun shade cannot be adjusted along with a light irradiation angle, light intensity acquired by a camera cannot meet requirements, images are not clear due to excessive exposure or insufficient exposure, the utilization value is poor, and use requirements cannot be met. An adjusting bracket is arranged below a camera shell, a base is arranged below the adjusting bracket, a motor is arranged in the base, a rotating shaft is arranged above the output end of the motor, a camera is arranged on one side of the camera shell, an infrared lamp is arranged on the outer portion of the camera, a sliding groove is formed in the camera shell, a U-shaped sun shade is arranged on the outer portion of the camera shell, a T-shaped sliding block is arranged between the U-shaped sun shade and the camera shell,a heat dissipation groove is formed in the camera shell, and a heat dissipation fan is arranged in the heat dissipation groove.
Owner:SUZHOU YOUDAN INTERNET TECH CO LTD

Thin film phase change memory cell and its manufacture method

A memory cell comprises a semiconductor feature and a phase change material. The semiconductor feature defines a groove that divides the semiconductor feature into a first electrode and a second electrode. The phase change material at least partially fills this groove and acts to electrically couple the first and second electrodes. At least a portion of the phase change material is operative to switch between lower and higher electrical resistance states in response to an application of a switching signal to at least one of the first and second electrodes.
Owner:IBM CORP

Similar material for fault mud burst model test and preparing method thereof

ActiveCN104891928AExperimental research results are accurateSolve the difficult problem of simulating similar materials of water-weakened disintegrating faultsCeramic shaping apparatusParaffin waxSodium Bentonite
The invention relates to a similar material for a fault mud burst model test and a preparing method thereof; the similar material comprises the components by weight: 1 part of a talcum powder, 2-7 parts of sand, 0.8-1.6 parts of gypsum, 0.2-0.6 part of bentonite, 0.01-0.4 part of liquid paraffin, and 0.2-0.7 part of mixing water. The preparing method comprises the steps: according to the proportion, weighing the talcum powder, sand, gypsum, bentonite and liquid paraffin; mixing evenly the talcum powder, sand, gypsum and bentonite in a stirrer; adding the mixing water, and fully stirring; adding the liquid paraffin and stirring; putting the mixed material into a molding die, and carrying out compaction molding; placing the molded material in a ventilated dry place for 24-36 h, and thus obtaining the similar material for the fault mud burst model test. The similar material can be slowly weakened and disintegrated under a water action, the disintegration performance can be changed through changing the composition, and a possibility is provided for fault mud burst in a process of real simulation of tunnel excavation.
Owner:SHANDONG UNIV

Preset weak area 2.5D woven composite fragile cover and preparation method thereof

The invention discloses a preset weak area 2.5D woven composite fragile cover, and belongs to the technical field of missile firing and protection. The preset weak area 2.5D woven composite fragile cover a throwing body and a framework wrapping the periphery of the throwing body. The combined position of the framework and the throwing body is divided into a weft separation area and a warp separation area. The invention further discloses a preparation method of the preset weak area 2.5D woven composite fragile cover. A 2.5D woven part reinforced epoxy resin composite serves as the material of the preset weak area 2.5D woven composite fragile cover; and according to the defect presetting manner in the weft separation area, the quantity of weft yarn keeps unchanged, and the density of warp yarn is reduced; and according to the defect presetting manner in the warp separation area, the quantity of warp yarn keeps unchanged, and the density of weft yarn is reduced. The fragile cover is light, the separation areas are novel in structure, a cover body is formed integrally and does not need to be cut, the strength of the fragile cover can be adjusted according to different pressure parameter requirements by adjusting the density of the yarn of the separation areas of the fragile cover, the fragile cover can bear pressure within a specific range and can be smoothly separated and thrown out under the action of missile gas flow, and the fragile cover is of a novel structure.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Liquid crystal display

A liquid crystal display, specifically a transmission type liquid crystal display having a built-in backlight at the rear side of a panel. The liquid crystal display has a gradation signal generator section (100) including an input image luminance level analyzing circuit (120) for acquiring the luminance level distribution for each color based on the RGB image signals, a correction coefficient computing circuit (140) for calculating the correction coefficients based on the luminance level distribution for each color and an image signal correction circuit (160) for correcting the luminance levels of the RGB image signals based on the correction coefficients, and a backlight intensity control circuit (600) for adjusting the light-emitting amount of each color LED based on the correction coefficients. The correction coefficient computing circuit (140) calculates the correction coefficients such that correction of the luminance levels reduces the difference in the luminance level distribution among each of RGB colors. The backlight intensity control circuit (600) adjusts the light-emitting amount of each color to cancel variation in the luminance level and variation in the light-emitting amount.
Owner:SHARP KK

Combustion engine with a motor brake device and a valve lash adjusting mechanism

The invention relates to an internal combustion engine with a engine brake mechanism and a valve clearance compensation mechanism, and the internal combustion engine has at least a combustion chamber, from which exhaust gas can be discharged by means of at least an exhaust valve (3, 4). Furthermore, the internal combustion engine includes an engine brake mechanism (2) with an hydraulic valve auxiliary control unit (19), and the valve auxiliary unit is integrated in a connecting mechanism (5, 6, 7) for connecting the exhaust valve (5) and the camshaft, and the valve auxiliary control unit (12) keeps the exhaust valve (3) in a temporary opening position when operating the engine brake mechanism, and a hydraulic valve clearance compensation mechanism (37) for the exhaust valve (3, 4). The valve clearance compensation mechanism for oil supply is connected to a main oil circle. The hydraulic valve auxiliary control unit (19) is connected to another auxiliary oil circle equipped related to the main oil circle.
Owner:MAN NUTZFAHRZEUGE AG

Anhydrous loam brick product repair agent

The invention relates to an anhydrous loam brick product repair agent, which is characterized in that the repair agent comprises the following components in percentage by weight: 15 to 25% of lime, 10 to 20% of old clay brick powder, 60 to 80% of quartz sand, 1 to 5% of pigment, 1 to 2% of redispersable rubber powder and 1 to 2% of other additives. Compared with the prior art, the invention can meet the special requirements on repairing old bricks especially brick sculptures, clay cultural relics and the like without whiskering, the product repaired with the repair agent has low-moderate intensity, and the repair point does not drop easily and has good weatherability.
Owner:TONGJI UNIV +1

Special material for injection grade non-halogen flame-retardant wire plug and preparation method thereof

The invention discloses special material and preparation method for injection molding level halogen-free flame retardation wire plug. The special material adopts elastic body and polyolefin resin as base material with expansion type flame retardant, flame retarding synergist, compatilizer, antioxidant and processing agent added. After intensive mixing, the special material is obtained through extrusion and pelleting by a BUSS mixing roll with autoweighing blanking device. The method has good mixing effect, stable compounding formula and high processing efficiency and the particles prepared via the method have even size and bright appearance. The flame retardation rating of produces prepared via the method reaches UL94V-0 level, the tiptop fusion index reaches 55g / 10min, and Shore hardness is from 65A to 95A in case of qualified flame retardation level and high fusion index. The composite material provided by the invention is environmental-friendly material which completely meets current international environmental requirements on halogen-free material. The material which not only has good flame retardation performance and flowing property but also enables smooth surface and good felt of products is suitable for manufacturing various injection molding level wire plugs with high flame retardation requirements.
Owner:SHANGHAI KINGFA SCI & TECH +1

Efficient rammer compactor for constructional engineering

The invention discloses an efficient rammer compactor for constructional engineering. The efficient rammer compactor comprises a box body. A motor seat is arranged on the left side of the upper end ofthe box body. A motor is mounted at the upper end of the motor seat. The right end of the motor is connected with a cam through a coupling. A sliding rod is arranged in the middle of the top end of the box body and is in sliding connection with the top end wall of the box body. The lower end of the sliding rod is arranged in the box body and provided with a bottom plate. A top plate is arranged at the upper end of the sliding rod. A first spring is arranged at the position, between the top plate and the box body, of the sliding rod in a sleeving manner. According to the efficient rammer compactor, through the cooperation function of the motor, the cam, the top plate, the sliding rod, the first spring, the bottom plate, a sliding plate, lifting rods and compaction plates, the effect of compacting the ground is achieved; the efficient rammer compactor is simple in structure, small in size and convenient to operate; the front compaction plate and the rear compaction plate are arranged, the ground can be repeatedly compacted in the movement process, equipment does not need to repeatedly work back and forth, the work efficiency can be improved, and time can be saved; and through the arrangement of telescopic rods, a good limiting assistance function can be achieved in the compaction process.
Owner:温州佰腾知识产权代理有限公司

0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube and production process thereof

The invention discloses a 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube. The 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube comprises the following chemical components in percentage by mass: 0.029-0.031% of C, 0.55-0.59% of Si, 1.12-1.14% of Mn, 0.001-0.003% of S, 0.015-0.017% of P, 17.55-17.75% of Cr, 10.15-10.25% of Ni, 0.33-0.35% of Nb, 0.022-0.024% of Mo, 0.04-0.06% of N, 0.149-0.151% of Ti, 0.0013-0.0015% of Sb, 0.0007-0.0009% of Pb, 0.0012-0.0014% of Ce, 0.08-0.12% of rare earth elements and the balance of Fe and unavoidable impurities. The invention further discloses a production process of the 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube. The 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube has good flexibility, corrosion resistance, high temperature resistance, wear resistance, tensile strength and water resistance and also has excellent electromagnetic shielding performance.
Owner:WUXI XINCHANG STEEL PIPE

Postoperative self-help rehabilitation nursing bed

The invention provides a postoperative self-help rehabilitation nursing bed, and mainly relates to the field of medical equipment. The postoperative self-help rehabilitation nursing bed comprises a bed body, wherein a back plate is arranged in the middle of the bed body; a supporting device is arranged on the back plate; a fixed seat is arranged at the tail end of the bed body; two beam columns are arranged at the bottom of the fixed seat; a spring rod is arranged between each beam column and the fixed seat; a blocking rod is arranged at the tail end of the bed body; extending rods are arranged at the top of each beam column; a pedal is arranged at one end, far from the beam column, of the extending rod. The postoperative self-help rehabilitation nursing bed has the benefits that the intensity of rehabilitation exercise can be better adjusted, which ensures that the patient performs rehabilitation exercise step by step, improves the effect of rehabilitation exercise, reduces the probability of occurrence of accidents during rehabilitation exercise, can shorten the nursing time of nursing personnel during the rehabilitation exercise processes, and saves the energy and strength of the nursing personnel.
Owner:王爱

Improving method for open caisson sinking construction in geology of sludge layer

InactiveCN105256819APrevent slope collapsePrevent scurryingCaissonsBulkheads/pilesSludgeWell drilling
The invention relates to an improving method for open caisson sinking construction in geology of a sludge layer. Sinking stability piles are changed from cement powder spraying piles into after-drilling injection grouting pillars. Construction of the after-drilling injection grouting pillars comprises the steps that (1) site leveling is conducted, surveying and lining are conducted to determine the positions of the after-drilling injection grouting pillars, and a drill is put in a position; (2) holes are formed by drilling an open caisson with the adoption of a single spiral drill; and (3) after the holes are formed, grouting is conducted to hole bottoms, after the hole bottoms are solidified, grouting is conducted while a drill bit is lifted, the after-drilling injection grouting pillars are formed until the drill bit is retreated from the formed holes. The after-drilling injection grouting pillars are stable in structure and good in uniformity. No large chiseling height difference is generated when opposite-chiseling is conducted. The open caisson sinking process is more stable.
Owner:CHINA FIRST METALLURGICAL GROUP

Application of LED ultraviolet lamp source in photochemical blood inactivation treatment equipment

ActiveCN109908376AReduced blood inactivation processing timeImprove efficiencyLavatory sanitoryRadiationAutomatic controlLight source
The invention discloses application of an LED ultraviolet lamp source in photochemical blood inactivation treatment equipment. The LED ultraviolet lamp source can be applied to a methylene blue / visible light treatment method, a psoralen / UVA treatment method and a riboflavin / UV treatment method. The invention also provides full-automatic blood inactivation treatment equipment with the LED ultraviolet light source. The full-automatic blood inactivation treatment equipment with the LED ultraviolet light source comprises an outer case, a sample rack, a blood container and an LED ultraviolet lamp plate, wherein a control panel and a sample port are arranged on the front surface of the outer case; the sample rack is provided with a plurality of sample telescopic plates, and the sample telescopicplates can stretch out or draw back to the sample port; and the blood container is bag-shaped or tubular, and the blood in the container is static or dynamic. According to the equipment provided by the invention, a full-automatic control system is adopted, ultraviolet emission intensity of the LED ultraviolet lamp can be actively adjusted, the irradiation intensity can be increased, so that the treatment time is greatly shortened, the treatment efficiency is improved, and large-scale or miniaturized treatment can be realized.
Owner:朱立国 +2

Combustion engine with a motor brake device and a valve lash adjusting mechanism

The internal combustion engine (1) has a combustion chamber, from which exhaust gas is discharged by outlet valves (3,4). An engine brake assembly (2) is provided with a hydraulic valve-auxiliary unit (19), which is integrated in connecting mechanisms (5,6,7) connecting the outlet valves with a camshaft and which hold the outlet valves in an intermediate opened position during operated engine brake assembly. The hydraulic valve-auxiliary unit is connected to an additional oil circuit for feeding.
Owner:MAN TRUCK & BUS AG

Inorganic quick-setting perfusion blasting pore sealing material for mining, and preparation method thereof

ActiveCN110194646AEarly hardeningGuaranteed liquidityArray data structureSlurry
The invention provides an inorganic quick-setting perfusion blasting pore sealing material for mining, wherein the pore sealing material comprises, by weight, 25-50 parts of sulphoaluminate cement clinker, 20-40 parts of gypsum, 5-10 parts of lime, 25-40 parts of fly ash, 0.5-3 parts of a composite admixture, and 80-110 parts of water, wherein the composite admixture comprises, by weight, 50-75 parts of a water reducing agent, 10-30 parts of anhydrous sodium sulfate, 2.5-25 parts of sodium metaaluminate, and 1-10 parts of a gas generation agent. According to the present invention, the processof the preparation method is simple; the prepared pore sealing material has characteristics of large slurry fluidity and good water retention property, wherein the initial setting time is adjusted within 20-35 min, the vertical expansion rate after hardening is 1-10%, and the 1.5 h compressive strength is 2-4 MPa; and the method has advantages of simple construction process, low labor intensity, low production cost and the like, does not generate three-waste, can utilize solid waste, and does not affect the environment.
Owner:HENAN COLLEGE OF IND & INFORMATION TECH +1

Experiment device used for verifying experiment laws of photoelectric effect and measuring Planck constant

InactiveCN103680276AGood monochrome performanceHigh measurement accuracyEducational modelsPhysicsMonochromator
The invention provides an experiment device used for verifying experiment laws of a photoelectric effect and measuring a Planck constant. The experiment device is characterized in that a monochromator and a photoelectric tube are arranged in a shading box; polarizing films are arranged in front of the photoelectric tube; the monochromator is connected with a controller, and the wave length of incident monochromatic light can be set through the controller; incident intensity can be set through an incident intensity controller; the photoelectric tube is connected with a measurement controller, and the photoelectric current of the photoelectric tube under different voltages can be measured through the measurement controller. The wave length and the intensity of the incident monochromatic light of the monochromator are set through the controller, and thus, the experiment laws of the photoelectric effect can be verified; an I-V curve of the photoelectric tube under the irradiation of different monochromatic light is mapped to determine a stopping voltage, and thus, the Planck constant can be worked out. According to the experiment device provided by the invention, by adopting a monochromatic source of which the wave length is continuous and adjustable, the incident intensity can be accurately controlled, the experiment laws of the photoelectric effect can be quantitatively verified, and the measurement accuracy of the Planck constant is improved. Moreover, data of students are not easy to be similar, and the I-V characteristic curve of the photoelectric tube also can be visually displayed in an oscilloscope.
Owner:HUANGHE S & T COLLEGE

An aluminum-based electronic packaging material and a processing method thereof

The invention discloses an aluminum-based electronic packaging material and a processing method thereof. The main ingredients of the material are (by weight percent): 20 to 80 percent of aluminum, 0.01 to 15 percent of graphene, 0.01 to 15 percent of carbon nanotubes and 2 to 70 percent of other components selected from at least one or more of diamond, silicon, tungsten, molybdenum, silicon carbide, titanium carbide, boron carbide, zirconium carbide, tungsten carbide, aluminum nitride, silicon nitride, boron nitride, titanium nitride, aluminum oxide, zirconium oxide, titanium boride and zirconium boride. The preparation method comprises the following steps of: firstly, uniformly mixing the powders of the components, continuously pushing the uniformly mixed powders into the grooves on the surface of the large roller by a screw pusher, rolling the aluminum-based alloy powders into strips under the rolling force of the large roller and a group of planetary rollers, and further extruding the strips from a molding die to obtain the required shape material. The method can continuously prepare the encapsulating material with low thermal expansion coefficient and high thermal conductivity.
Owner:SHANGHAI DIANJI UNIV
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