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62results about How to "Overcome adverse effects" patented technology
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Method for preparing yttrium-doped nano aluminum nitride powder
ActiveCN102502539AOvercome adverse effectsPromote dense sinteringMaterial nanotechnologyNitrogen compoundsIonSolvent
The invention discloses a method for preparing yttrium-doped nano aluminum nitride powder. The method comprises the following steps of: dissolving an aluminum source, a carbon source and an yttrium source into a solvent, and then mixing the solvent and an ethylene glycol solution of citric acid; and preserving the heat of the mixed solution for 2 to 4 hours at the temperature of between 125 and 135 DEG C, continuously heating the mixed solution to the temperature of between 180 and 220 DEG C, preserving the heat for 2 to 4 hours, calcining the obtained substance at the temperature of between 800 and 1,200 DEG C in vacuum or nitrogen, cooling, grinding, performing carbothermic reduction reaction at the temperature of between 1,450 and 1,550 DEG C, and thus obtaining the yttrium-doped nano aluminum nitride powder. By using the complexing effect of the citric acid and the steric hindrance effect of the ethylene glycol, the aluminum and yttrium ions are uniformly distributed in the carbonsource, and the yttrium-doped nano aluminum nitride powder with small particle diameter and uniform components is finally obtained; and the yttrium-doped nano aluminum nitride powder can effectively reduce the sintering temperature of aluminum nitride ceramic and improve the heat conductivity of the aluminum nitride ceramic, and has an important application prospect in electronic substrates and power devices.
Owner:CHINA JILIANG UNIV
Unmanned aerial vehicle airborne platform-based vehicle type identification method
InactiveCN106096504AOvercome adverse effectsWide range of applicationsCharacter and pattern recognitionSevere weatherSlide window
The invention discloses an unmanned aerial vehicle airborne platform-based vehicle type identification method and belongs to the technical field of video images. The method comprises the following steps of S1: adjusting the height of an unmanned aerial vehicle above the ground to a position suitable for vehicle type identification; S2: acquiring infrared image positive and negative samples used for vehicle target detection offline, performing characteristic extraction by utilizing a convolutional neural network (CNN), and performing support vector machine (SVM) training to obtain an SVM classifier model used for online vehicle type identification; S3: performing infrared photography by utilizing an infrared video camera to obtain a video image signal; and S4: performing sliding window sampling on a shot infrared image sequence, extracting vehicle type characteristics by utilizing the CNN, and inputting the characteristics in the classifier model obtained in the step S2 to perform classification. According to the method, the vehicle type identification can be finished in the day, at night and under the condition of severe weather condition and relatively low visibility by adopting the infrared video camera; and meanwhile, the method can be used for dynamically selecting a detection region, so that the flexibility of a detection system is improved.
Owner:CHONGQING UNIV
Determination method of vehicle electric power-assisted steering system friction compensation torque
ActiveCN107097846AOvercome adverse effectsGood control effectElectrical steeringSteering systemControl effect
The invention provides a determination method of vehicle electric power-assisted steering system friction compensation torque. The determination method comprises the steps of 1, according to the relation between torque and rotational inertia, introducing a physical amount related to friction torque; 2, determining an input and calibrated variable, in a MATLAB environment, establishing a Simulink model to achieve friction compensation; since correlation exists among friction compensation torque, power-assisted torque, steering wheel hand power torque and angle acceleration, according to the relational expression, establishing a mathematical model. In the EPS system, after the determination method of the vehicle electric power-assisted steering system friction compensation torque is adopted, adverse influence of friction of all links of a system to power-assisted performance can be overcome, so that a control effect of an electric power-assisted steering system is better, and the operation is more comfortable.
Owner:嘉兴仕善汽车科技有限公司
Palladium-Based Supported Hydrogenation Catalyst, And Preparation Method And Application Thereof
ActiveUS20180290949A1Improve performanceOvercome adverse effectsHydrocarbon by hydrogenationCatalystsActive componentHydrogenation process
The present invention relates to a palladium-based supported hydrogenation catalyst and a preparation method and application thereof. The catalyst is prepared by the following method: impregnating an Al2O3-containing carrier with an organic solution containing a bipyridine derivative having hydroxy group, optionally drying followed by impregnating with a mixed solution containing the main active component palladium ions and the auxiliary active component Mn+ ions, where M is one selected from Ag, Au, Ni, Pb and Cu; and then optionally drying, and calcining to obtain the catalyst. The preparation method provided by the present invention allows Pd atoms and M atoms to be highly uniformly dispersed on the carrier, which overcomes the adverse impact of the surface tension of the impregnation solution and the solvation effect on the dispersibility of active components. The palladium-based supported hydrogenation catalyst provided by the present invention has excellent hydrogenation activity, ethylene selectivity and anti-coking performance, and can be used in a selective hydrogenation process of C2 fraction.
Owner:PETROCHINA CO LTD
Laser annealing technique on the wafer back of IGBT high voltage power device
ActiveCN101217115ASolve the problem of not being able to perform good annealingAchieve activationSemiconductor/solid-state device manufacturingHigh pressureIon implantation
The invention discloses a wafer back surface laser annealing process of an IGBT high-voltage power device, which pertains to the semiconductor manufacturing technical scope. The invention adopts a scanning mode to carry out the laser annealing, a silicon wafer back surface is controlled to do the reciprocating uniform linear motion along the vertical direction of a long strip-shaped laser spot, so as to form the laser spot to carry out the scanning of the entire area of the silicon wafer back surface, increase the temperature of a surface layer of the silicon wafer back surface and generate the uniform annealing effect. The usage of the proposal of the invention can solve the problem that a P-shaped doping layer can not carry out good annealing processing after the ion injection, so a good ohmic contact is formed between a collector metal layer and the P-shaped doping layer which is close to the silicon wafer. The invention uses a laser with the shorter wavelength, the penetration depth of the laser on the silicon wafer back surface is limited, the invention can not only faster realize the activation of impurities, but also generate the adverse effects on other structural parts of the IGBT high-voltage power device; the usage of the technology can obtain the IGBT high-voltage power device with the smaller on-state resistance.
Owner:TSINGHUA UNIV
Mountain road curve vehicle crossing early warning method based on videos
InactiveCN104809916AOvercome adverse effectsWide range of applicationsAnti-collision systemsSelf adaptiveVisibility
The invention discloses a mountain road curve vehicle crossing early warning method based on videos, and belongs to the technical field of video images. The method includes the following steps of firstly, conducting infrared camera shooting through an infrared camera to obtain video image signals; secondly, conducting vehicle target detection through a self-adaptive Gaussian mixture modeling method to obtain vehicle characteristics; thirdly, calculating the average vehicle area of multiple frames, and judging the running directions of vehicles; fourthly, conducting vehicle tracking on vehicle targets entering the camera shooting range through the MeanShift algorithm; fifthly, measuring vehicle speeds through the angular point characteristic matching algorithm, comparing the vehicle speed with the maximum regulated vehicle speed at a curve, and conducting front road condition information display and real-time voice prompting or early warning on the two ends of the curve. By means of the infrared camera, the vehicle target detection can be completed under the conditions that the weather is bad and visibility is low, the curve vehicle crossing early warning is conducted through information display and real-time voice broadcasting, and the aim of comprehensive effective early warning in the running process is achieved.
Owner:CHONGQING UNIV
High-elongation-rate heat-resistant aluminum alloy suitable for gravity casting and preparation method thereof
The invention provides a high-elongation-rate heat-resistant aluminum alloy suitable for gravity casting and a preparation method thereof. The alloy comprises the following elements of, by weight, 9.0-12.0% of Si, 0.05-0.4% of Cu, 0.02-0.05% of Mg, 0.05-0.1% of Sc, 0.6-0.8% of M and and the balance Al and inevitable Fe impurities, wherein the M comprises at least two elements of Ti, Zr and V. After gravity casting of the high-elongation-rate heat-resistant aluminum alloy suitable for gravity casting, room-temperature yield strength of the as-cast alloy can reach 143-152MPa, the elongation ratecan reach 8.0%-12.0%, high-temperature tensile strength at 200 DEG C can reach 158-170MPa, the high-temperature elongation rate can reach 10.0%-20.0%, the room-temperature yield strength and heat resistance are excellent, the alloy can be applied to automobile parts without solid solution heat treatment, so that the requirements of light-weight development of automobiles can be met.
Owner:SHANGHAI JIAO TONG UNIV
Energy management method considering random forecast error of independent microgrid
InactiveCN109617138AOvercome adverse effectsMake reasonable arrangementsSingle network parallel feeding arrangementsEnergy storageState of chargeRegenerative energy
The invention provides an energy management method considering a random forecast error of an independent microgrid. The independent microgrid comprises a wind power-photovoltaic-micro gas turbine-energy storage battery and an energy management system (EMS), wherein the EMS is used for monitoring a state-of-charge (SOC) state of the energy storage battery in real time, monitoring wind power and photovoltaic actual generation power and measuring actual powers of the micro gas turbine and the energy storage battery, a random forecast error of a net load is obtained according to powers which are forecasted and actually monitored, the contribution of the controllable micro gas turbine and the energy storage battery are arranged and adjusted by a multi-variable and multi-constraint mathematicaloptimization method and a set process according to the size of the random forecast error of the net load, so that the energy storage battery normally runs. According to the method provided by the technical scheme, the unfavorable influence brought by the forecast error of the load and a regenerative energy power is overcome, the contribution of the controllable micro source and energy storage arearranged and adjusted by the mathematical optimization method according to the size of the random forecast error of the net load, and stable, reliable and economic running of the microgrid is achieved.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Roll plasticizing shaping method of large plastic product and its special mould
InactiveCN1555971AOvercome adverse effectsGood qualityCoatingsMaterials scienceUltimate tensile strength
Owner:ZHEJIANG JIANGNENG ENVIRONMENTAL PROTECTION TECH
Cellulose-reinforcement disc-adhesion-prevention squeaking-prevention abrasion-resistant braking material and preparation method thereof
ActiveCN105038101AOvercome adverse effectsNo secondary damageOther chemical processesNatural fiberSurface finishing
The invention discloses a cellulose-reinforcement disc-adhesion-prevention squeaking-prevention abrasion-resistant braking material and a preparation method thereof. The braking material comprises, by weight, the main raw materials of 6-18 parts of natural cellulose subjected to flame retarding, thermal stabilization and surface treatment (the surface of the cellulose is coated with coupling agents with 1-3% weight), 8-24 parts of modified resin matrixes, 3-12 parts of core-shell rubber powder, 3-9 parts of epoxidation vegetable oil, 5-15 parts of friction conditioning agents, 6-12 parts of carbonaceous materials and the balance of barium sulfate used for filling to 100 parts. The preparation method includes the steps that the natural cellulose is subjected to flame retarding and stabilization treatment, then the coupling agents are sprayed to the natural cellulose, the natural cellulose is suspended to be opened, heating is performed at 30-90 DEG C until the coupling agents are completely soaked, the cellulose subjected to surface treatment and other components are mixed inside a Z-type stirring machine to obtain mold pressing powder, the mold pressing powder is formed at 120-160 DEG C and 5-10 Mpa in a hot pressing mode, hot pressing time is determined according to the thickness of a product and is generally 1.5-3 min / mm for fitness. The components with porous structures are added into the ingredients, so that a brake pad has the disc-adhesion-prevention, squeaking-prevention and abrasion-resistant effects.
Owner:SHANDONG UNIV
High-performance PID control method
InactiveCN108549214AReduce sensitivityOvercome adverse effectsControllers with particular characteristicsPID controllerLow-pass filter
The invention provides a high-performance PID control method, which comprises the following steps: connecting a main PID controller and an auxiliary PID controller in series, introducing a first variable coefficient to the proportionality coefficient of the main PID controller, introducing a second variable coefficient to the differential coefficient of the main PID controller, and connecting a low-pass filter to the differential term of the auxiliary PID controller in series; calculating a current moment control deviation value, judging whether the current moment control deviation value is greater than a threshold of an adjusting target value, and if the current moment control deviation value is greater than the threshold of the adjusting target value, calculating the current control quantity by the main PID controller and the auxiliary PID controller which are connected in series; and outputting the current control quantity to a controlled object by the auxiliary PID controller. According to the invention, by series connection of the main PID controller and the auxiliary PID controller, a robot has a stronger adaptability and can be applicable to more complex road conditions.
Owner:赵春红 +1
Horizontal high-voltage super junction power semiconductor device
ActiveCN103489915AOvercome adverse effectsImprove device withstand voltageSemiconductor/solid-state device manufacturingSemiconductor devicesPhysicsPower semiconductor device
The invention relates to a power semiconductor technique, in particular to a charge-compensation horizontal high-voltage super junction power semiconductor device. According to the horizontal high-voltage super junction power semiconductor device, the surface of a P type substrate layer is covered by an N type charge compensation layer. The N type charge compensation layer comprises various doping method of uniform doping, linear doping, disperse doping and the like. The linear doping can obviously reduce the auxiliary exhaust function of a substrate. The horizontal high-voltage super junction power semiconductor device has the advantages of using an injection selection function to adjust the doping concentration based on the linear doping to obtain an optimized doping method, fully takes ideal substrate conditions and charge balance conditions of equivalent substrates into consideration, well overcomes the effects of the auxiliary exhaust functions of substrates and enables a super junction LDMOS to achieve the optimal pressure resistance. The horizontal high-voltage super junction power semiconductor device is especially applied to the field of horizontal high-voltage super junction power semiconductor devices.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA +1
Film bulk acoustic wave resonator and preparation method thereof
ActiveCN109302158ASimple structureNot easy to collapseImpedence networksThin-film bulk acoustic resonatorAcoustic wave
The invention discloses a film bulk acoustic wave resonator, comprising a growth substrate, a piezoelectric film, a top electrode and a bottom electrode, wherein the piezoelectric film is epitaxiallygrown on the growth substrate, the top electrode is prepared on an upper surface of the piezoelectric film, a lower guide hole is deeply etched on the growth substrate, and the lower guide hole penetrates through the growth substrate and the piezoelectric film; and a back surface of the growth substrate is etched to form a hollow cavity, and the bottom electrode is prepared on a lower surface of the growth substrate. The invention further provides a preparation method of the film bulk acoustic wave resonator. The film bulk acoustic wave resonator disclosed by the invention is simple in structure, is unlikely to collapse, can well improve the quality of the piezoelectric film, and will become a solution suitable for radio frequency filters in high frequency and high power occasions in the future.
Owner:HEYUAN AIFO LIGHT COMM TECH CO LTD
Separation type Raman laser in full solid state
InactiveCN1761111AOvercome adverse effectsOvercome constraintsOptical resonator shape and constructionActive medium materialSingle crystalFrequency shift
The Raman laser with simple compact structure includes pump system of diode laser end face, laser cavity composed of coated laser input / output cavity mirrors, independent laser gain crystal placed in laser cavity, Raman frequency shift crystal and turning Q unit for laser. Output Raman laser is obtained from laser in quasi continuous operation. Laser gain crystal is Nd:YVO4 crystal, doping Nd3+ laser crystal or doping Yb3+:YAG etc. laser crystals, which generate laser oscillations with wavelengths near to 1.34 micro or 1.06 micro. Raman frequency shift crystal is prepared from one piece of single crystal as Raman active medium. Here, the Raman frequency shift crystal is undoped YVO4 crystal etc. in the invention, laser gain crystal and Raman frequency shift crystal are independent from each other so as to raise output power and beam quality of laser since heat effect does not occur.
Owner:NANJING UNIV
Steel casing installation device and installation method at complex terrains
InactiveCN108330964AHigh control precisionOvercome adverse effectsBulkheads/pilesTerrainSquare Shape
Owner:THE FOURTH ENG CO LTD OF CHINA ZHONGTIEMAJOR BRIDGE ENG GRP +1
Pivotal connection for heavy-duty vehicle suspension assembly
A suspension assembly of an axle / suspension system for a heavy-duty vehicle is mounted on the heavy-duty vehicle frame or sub-frame via a beam of the suspension assembly which is pivotally connected to a hanger connected to the vehicle frame. The pivotal connection includes the hanger, the beam, a bushing assembly and a fastener group, and a textured feature formed in at least one of at least a portion of the hanger, at least a portion of the bushing assembly, or at least a portion of the fastening means so that the textured feature inhibits relative movement of the bushing assembly with respect to the hanger.
Owner:HENDRICKSON USA L L C
Forcible separation centrifugal clutch
InactiveCN103089849ASolve the difficulty of shifting gearsOvercome adverse effectsMechanical actuated clutchesAutomatic clutchesVariatorCentrifugal clutch
The invention discloses a forcible separation centrifugal clutch which comprises a driving part, a centrifugation body and a driven part. A rotary shaft of the driving part is connected with a rotary shaft of an engine in a transmitting mode. The driven part is connected with a load in a transmitting mode. The centrifugation body is matched with an inner cavity of the driven part in a mode of friction. A radial guiding structure is arranged between the centrifugation body and the driving part. A forcible traction mechanism capable of enabling the centrifugation body to move inward in the radial direction is arranged on the driving part or on the rotary shaft of the driving part. The forcible separation centrifugal clutch has the advantages of a centrifugal clutch and is capable of forcibly switching off the centrifugal clutch. The problem that gear shifting is difficult to the engine in a high-speed running process is solved. The defect that the gear shifting has negative effect on a speed changer in the high-speed running process of the engine is overcome. The forcible separation centrifugal clutch is reasonable in structure, easy to manufacture or transform, convenient to use, good in effect, and capable of being popularized and implemented conveniently.
Owner:杨勇
Perovskite catalyst and preparation method and application thereof
ActiveCN111185182AOvercome adverse effectsHigh catalytic activityDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPerovskite (structure)Ptru catalyst
The invention provides a perovskite catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adsorbing a raw material solution by using atemplate agent to obtain a catalyst precursor; carrying out heat treatment on the catalyst precursor to obtain a doped perovskite type composite; at least partially dissolving the composite, by meansof which the B element on the surface of the composite is at least partially removed; wherein the doped perovskite type composite has a composition A<1-x>BxCO3 (I); the B represents a metal element doped in an ACO3 type perovskite structure, the element A is selected from rare earth metals, the element B is selected from alkaline earth metals, the element C is selected from transition metals, andthe x is greater than 0 and less than 1. The perovskite catalyst provided by the invention overcomes the adverse effect of the strontium element enriched on the surface on the activity of the catalyst, and has high catalytic activity.
Owner:TSINGHUA UNIV
Method for acquiring effective number of regional shared bicycles based on service time
ActiveCN108399736AOvercome adverse effectsRoad vehicles traffic controlLocation dataReal-time computing
The invention discloses a method for acquiring the effective number of regional shared bicycles based on service time. The method includes the steps that firstly, a city is divided into shared bicycleeffective number analysis regions according to the actual condition of the city; secondly, operation data is converted into location data of the bicycles, and the region where each bicycle is locatedin each time of location is determined; finally, by judging whether or not each bicycle is located in the same region in each time of location as the next time of location, the cumulative service time of each bicycle in each region is calculated to determine the effective bicycle number of each region. By means of the method, the effective number of shared bicycles in corresponding regions can beobjectively acquired, and an analysis basis is provided for guiding efficient operation of enterprises through spatial analysis of operational indicators.
Owner:SOUTHEAST UNIV +1
Pivotal connection for heavy-duty vehicle suspension assembly
A suspension assembly of an axle / suspension system for a heavy-duty vehicle is mounted on the heavy-duty vehicle frame or sub-frame via a beam of the suspension assembly which is pivotally connected to a hanger connected to the vehicle frame. The pivotal connection includes the hanger, the beam, a bushing assembly and a fastener group, and a textured feature formed in at least one of at least a portion of the hanger, at least a portion of the bushing assembly, or at least a portion of the fastening means so that the textured feature inhibits relative movement of the bushing assembly with respect to the hanger.
Owner:HENDRICKSON USA L L C
Electromagnetic permanent magnet electric machine
InactiveCN1862927AGuaranteed uniformityGuaranteed symmetryMagnetic circuit rotating partsSynchronous machines with stationary armatures and rotating magnetsElectric machineMagnetization
The invention relates to the electromotor, the stator iron core is mounted on the electromotor, the three phase symmetry winding is mounted on the stator iron core, the permanent magnet is fixed on the rotor iron core. The generator rotor of the invention is mounted with one loop slop locating on the half of the width. Two sides of the loop slop are mounted with the slop along the direction of the axis on the rotor, and these slops are collocated distantly along the sides of the loop slot, the slop along the axis is the adopting pole constructed by the rotor iron core soft iron. The permanent magnet are fixed on the slot along the axis, thereinto, each permanent magnet N poles located in the slot along the axis on the side of the loop slot point at the centre of the a circle of the rotor, and the S pole of each permanent magnets located on the other side of the loop slot point at the centre of the circle of the rotor, so the magnet direction formed is the magnetization along the axis.
Owner:赵克中 +2
Wafer baking device
PendingCN112349626AOvercome adverse effectsImprove stabilitySemiconductor/solid-state device manufacturingPhysicsEngineering
The invention discloses a wafer baking device which comprises a shell, a sealing mechanism, a heater and an ejection mechanism, the sealing mechanism, the heater and the ejection mechanism are arranged in the shell, a lifting guide rail is arranged on the surface of the shell, and the ejection mechanism and the sealing mechanism are both connected with the lifting guide rail in a sliding mode. Therefore, the lifting motion of the ejection mechanism can be matched with the stable heater to eject a wafer or return a thimble, and the lifting motion of the sealing mechanism is matched with the stable heater to seal or remove the sealing of the heater, so that the adverse effect caused by the lifting of a heating plate in the prior art is overcome; the stability of wafer placement is improved,the safety is good, and subsequent taking and placing procedures are facilitated; and meanwhile, the lifting mechanism is prevented from being directly connected with the heating disc, the requirements for heat resistance, safety and the like of the lifting device are reduced, and the selectivity of the lifting device is widened.
Owner:芯米(厦门)半导体设备有限公司
Glipizide lipid nanoparticle solid preparation
ActiveCN108042495AAvoid poor liquidityOvercome adverse effectsPowder deliveryMetabolism disorderMagnesium stearateLactose
The invention relates to a new solid preparation of glipizide, in particular to a glipizide lipid nanoparticle solid preparation, and belongs to the technical field of medicine. According to the technical scheme, the glipizide lipid nanoparticle solid preparation compound is prepared from 2.5% of glipizide, 30-40% of water-insoluble lipid laurostearin, 5-8% of chitosan of which the molecular weight is 150-300 kDa, 17-22.5% of hydrophilic surfactant tween (80), 14-23% of lactose, 10-15% of starch, 3-5% of povidone (K30) and 1-1.5% of magnesium stearate. The glipizide lipid nanoparticle solid preparation has excellent performance.
Owner:DISHA PHARMA GRP
Limiting method and device for floating type ship collision prevention floating body
ActiveCN102425104AOvercome adverse effectsOvercome securityClimate change adaptationBridge structural detailsMarine engineeringMechanical engineering
The invention discloses a limiting method and device for a floating type ship collision prevention floating body. The limiting device comprises a floating body and a stop limiting device, wherein the floating body is sleeved on an auxiliary pier, and can move up and down; the upper surface or the lower surface of the floating body is provided with a stop limiting device for limiting the floating body from vertically floating upwards; a one-way limit valve is installed on the floating body; a cavity is formed inside the floating body; and the one-way limit valve is connected to the cavity inside the floating body. Under the effect of the stop limiting valve, the vertical height of the floating body is limited, the floating body is positioned at the highest vertical height permitted by the stop limiting device; if the water level rises continuously, the hydraulic pressure suffered by the surface of the floating body is increased, and when the hydraulic pressure is increased to the pressure set by the one-way limit valve, the one-way limit valve is opened and the water enters into the cavity inside the floating body, the vertical resultant force suffered by the floating body is reduced, and finally the force is balanced at the limit position; and therefore, the defect that a floating-type ship collision prevention floating body brings adverse effects and potential safety hazards to bridges in an extreme water level or a high water level is overcome.
Owner:ZHUZHOU TIMES NEW MATERIALS TECH
Oriented high silicon steel strip and efficient annealing-mode preparation method thereof
ActiveCN108823372ARealize flexible controlLow heating temperatureSolid state diffusion coatingFurnace typesThin sheetSilicon
An oriented high silicon steel strip and an efficient annealing-mode preparation method thereof belong to the technical field of metallurgy. The oriented high silicon steel strip comprises the following ingredients (by weight): 4.5-7.0% of Si, C being less than or equal to 0.1%, 0.005-0.05% of Als, 0.003-0.01% of N, 0.03-0.3% of Mn, Cu being less than or equal to 0.5%, 0.003-0.035% of S, 0.02-0.4%of Nb, 0.005-0.1% of V, and the balance Fe and impurities. The method comprises the following steps: casting according to the composition design to obtain a slab, hot-rolling, carrying out acid pickling, cold-rolling after acid pickling, carrying out decarburizing annealing on the slab, carrying out nitriding treatment, and finally carrying out secondary recrystallization annealing. By controlling an inhibitor system, the rolling technology and the annealing technology, short-process annealing-mode preparation of the oriented high silicon steel is realized, production efficiency is raised, production cost is reduced, and the product has excellent comprehensive performance and is thinner in thickness.
Owner:NORTHEASTERN UNIV
Rapid preparation method of paraffin sections of pear tissue
InactiveCN109211606AOvercome adverse effectsGuaranteed Waxing EffectWithdrawing sample devicesPreparing sample for investigationParaffin waxChemistry
The invention discloses a rapid preparation method of paraffin sections of pear tissue, comprising the following steps: S1, taking and fixing materials; S2, dewatering; S3, carrying out transparence treatment; S4, wax-dipping; S5, embedding; S6, slicing, pasting and drying; S7, dewaxing, rehydrating and dyeing; S8, dewatering, carrying out transparence treatment and sealing, wherein the dewatering, transparence treatment and wax-dipping processes are carried out in a constant temperature environment of 65 DEG C through microwave radiation heating or water bath heating. According to the rapid preparation method of paraffin sections of pear tissue, the manufacturing time of the paraffin sections of the pear tissue can be greatly shortened, the obtained sliced tissue is clear, and the qualityof the sections can reach the expected effect.
Owner:JILIN ACAD OF AGRI SCI
Method for improving preparation yield of FBAR filter and FBAR filter
The invention provides a method for improving the preparation yield of an FBAR filter and the FBAR filter. The method comprises the following steps: generating a piezoelectric film on a first substrate, and forming at least one first electrode; forming a support layer, etching the support layer to form a first support layer cavity, and forming a first bonding layer on one side of the support layer; forming at least one mark point on the second bonding layer on one side of the bonding substrate and forming a first through hole penetrating through the bonding substrate on the bonding substrate;bonding and connecting the first bonding layer and the second bonding layer, removing the first substrate, and forming a top electrode and an electrode up-leading structure connected with the first electrode on one side, far away from the first electrode, of the piezoelectric film, so as to form the FBAR filter. In the preparation process, a sacrificial layer is not required to be used, the integrity of the piezoelectric film is kept, and the structural design that the holes are formed in the bonding substrate is stable in structure and not easy to collapse, so that the quality of the piezoelectric film can be well improved.
Owner:广州市艾佛光通科技有限公司
Dynamic monitoring method for road quality based on sanitation vehicle
ActiveCN108547202AOvercome adverse effectsReduce labor costsRoads maintainenceDynamic monitoringData analysis
A dynamic monitoring method for the road quality based on a sanitation vehicle comprises the following steps: establishing a road model for a target road, and initializing the road model; performing road quality detection on the target road by using a road quality dynamic monitoring device mounted on the sanitation vehicle; and comparing and analyzing data change according to the detection resultto deduce road quality change information. The device is mounted on the sanitation vehicle, and the characteristics of nighttime operation and periodic operation of the sanitation vehicle are fully utilized, so the restriction of the traffic environment to detection development and the adverse influences of the detection development on the traffic are overcome, and the labor cost is saved; the periodic continuous automatic monitoring of the road is achieved, the shortcoming of long working cycle of traditional inspection work is overcome, the quality status of the road is reflected through thecontinuous change of the internal structure of the road, and the problems of low working efficiency and difficult data analysis brought by traditional artificial analysis and parsing of detection data are solved; and a set of an automatic detection point compensation method and a compensation device is improved to improve the radar detecting and positioning accuracy, so the accuracy and the usability of the detection data are improved.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Closed link transportation device driven by permanent magnet linear motor
ActiveCN102718027AOvercome concentrated accumulationIncrease the lengthConveyorsMaintainabilityElectric machinery
The invention discloses a closed link transportation device driven by a permanent magnet linear motor, which comprises an even number of chain links which are connected with each other end to end, wherein every two chain links are connected with each other through a connection lock catch, so as to form a closed transportation link; each chain link is fixedly connected with a runner of a linear motor; a plurality of runners are sleeved on one or more stators of the linear motor; a permanent magnet is arranged between each stator and each runner; the polarities of permanent magnets on adjacent runners are opposite; and each chain link is supported through a transportation rail, and can move freely on the transportation rail. According to the invention, a long chain is driven by the double side permanent magnet coreless permanent magnet linear motor, so as to disperse driving power, overcome centralized tension accumulation as well as limitation and adverse effects caused by the centralized tension accumulation when a chain wheel driving manner is adopted, improve the maintainability and the reliability of a product, prolong the service life of the product, and can infinitely extend the length of the link.
Owner:CHINA TOBACCO MACHINERY TECH CENT
Percutaneous absorption plaster for treating degenerative osteoarthropathy
InactiveCN103181956AOvercome adverse effectsAvoid first pass effectAnthropod material medical ingredientsAntipyreticLigusticum chuanxiongMonkshoods
The invention discloses a percutaneous absorption plaster for treating degenerative osteoarthropathy, which is prepared by the following raw materials: 0.01-0.3 parts of mylabris, 0.3-6 parts of monkshood, 0.5-15 parts of Aconitum kusnezoffii, 1-3 parts of rhizoma corydalis and 1-3 parts of Ligusticum wallichii; 2) extracting the raw materials by an ethanol aqueous solution to obtain an extract product; and 3) adding a percutaneous penetration enhancer to prepare the percutaneous absorption plaster. By using a percutaneous targeting drug delivery system, the percutaneous absorption plaster enables long-time continuous drug delivery, can keep necessary plasma concentration, overcome the adverse influence on human body when the plasma concentration reaches a peak value after oral drug administration, the first pass effect can be avoided, the percutaneous absorption plaster has little harm to liver and kidney, and the simultaneous treatment of principal and subordinate symptoms can be reached.
Owner:崔建平
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