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119 results about "Gradient function" patented technology
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The gradient function is a precursor to the fundamental idea of a derivative. We know that the gradient over an interval can be found by calculating rise/run of any function, but most often in the real world, these functions don't behave in straight lines and so the gradient function is often very wrong.
System and method for detecting features from images of vehicles
InactiveUS20060177100A1Character and pattern recognitionColor television detailsArtificial intelligenceGradient function
A method of detecting a feature of a vehicle in an image of a vehicle includes providing a digitized image of a vehicle, providing a first filter mask over a first subdomain of the image, where the filter mask is placed to detect a feature in the image, calculating a function of a gradient of the image inside the first masked subdomain, and detecting the presence or absence of a vehicle feature within the first masked subdomain based on the value of the gradient function.
Owner:SIEMENS CORP +1
Method of laser induction composite cladding gradient function thermal barrier coating
InactiveCN101748402AImprove cladding efficiencyImprove thermal shock resistanceMetallic material coating processesNumerical controlLaser scanning
The invention discloses a method of a laser induction composite cladding gradient function thermal barrier coating, which is characterized in that the methods and steps are as follows: (1) the surface of base material is provided with processing of rust removing, oil removing, cleaning and sand spraying; (2) meanwhile, the inert protective gas is blown into an induction heating zone through utilizing a copper pipe, which prevents the high-temperature oxidation; (3) a focused laser beam and a powder nozzle of an automatic double-hopper powder feeder are located in the induction heating zone, and the composition of the laser heat source and the induction heating source can be realized; (4) a numerical control machine is moved 70-30% of the laser spot diameter along the vertical direction of the laser scanning speed; (5) the mass percentage content of a ceramic phase in the composite powder is led to be increased by 0-90 wt.%; (6) steps (2)-(5) are repeated until the required thickness of the coating is achieved; otherwise, the work is ended. The advantages of the invention are as follows: (1) the size, the shape and the part needing to process of the base material are not limited; (2) for the gradient function thermal barrier coating, the content of the ceramic phase in the coating presents change of gradient and is controllable along the thickness direction of the coating; (3) the whole gradient function thermal barrier coating has no air hole and crack; (4) the service life is greatly increased.
Owner:NANCHANG HANGKONG UNIVERSITY
Reinforcement learning system
ActiveUS20100114807A1Evaluation can be shortenedDigital computer detailsMachine learningGradient functionReinforcement learning
A reinforcement learning system (1) of the present invention utilizes a value of a first value gradient function (dV1 / dt) in the learning performed by a second learning device (122), namely in evaluating a second reward (r2(t)). The first value gradient function (dV1 / dt) is a temporal differential of a first value function (V1) which is defined according to a first reward (r1(t)) obtained from an environment and is served as a learning result given by a first learning device (121). An action policy which should be taken by a robot (R) to execute a task is determined based on the second reward (r2(t)).
Owner:HONDA MOTOR CO LTD +1
Hollowed-out lattice sandwich layer with gradient functionality and manufacturing method of hollowed-out lattice sandwich layer
ActiveCN106694884ALightweight structureHigh specific strengthAdditive manufacturing apparatusIncreasing energy efficiencySelective laser meltingSandwich board
The invention discloses a hollowed-out lattice sandwich layer with gradient functionality. The hollowed-out lattice sandwich layer with gradient functionality comprises two cladding plates, wherein a core sandwich layer is arranged between the cladding plates and comprises a plurality of hollowed-out lattice filling units which are connected with one another; and each hollowed-out lattice filling unit consists of a plurality of tiny dense hollowed-out base cells. The hollowed-out sandwich layer is formed by the hollowed-out lattice filling units, and is light in structure weight and high in specific strength, the maximum weight reduction benefit can reach 85% or above, and meanwhile, the hollowed-out lattice sandwich layer has functional benefits such as heat insulation and sound insulation; comprehensive benefits of structure light weight and functionalization are improved, property mismatching of a sandwich board with the single structure in the application field under various working conditions is avoided, and finally, the gradient function is fulfilled; and meanwhile, a selective laser melting technology is adopted, the risk of reduction of strength of a connecting region between a traditional sandwich layer and an outer cladding plate and complicated multi-process flow can be avoided, and therefore, the use value is quite high.
Owner:XIAN BRIGHT ADDTIVE TECH CO LTD
Polymer-matrix electric conduction gradient function material and preparation method thereof
The invention discloses a polymer-matrix electric conduction gradient function material and a preparation method thereof. The content of electric conduction filler in the prepared polymer-matrix electric conduction gradient function material shows continuous gradient change along the thickness direction of the material from low to high, and the performance also changes correspondingly. The preparation of the material mainly uses rheology principle to realize the gradient of distribution of material components by controlling and influencing thermodynamic factor and dynamic factor in the deposition process.
Owner:BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
Method and device for locating fault on direct current grounding electrode circuit
The invention discloses a method and device for locating a fault on a direct current grounding electrode circuit. The method for locating the fault comprises the steps that a plurality of voltage sampling values and a plurality of current sampling values , corresponding to a plurality of preset sampling times, of the direct current grounding electrode circuit are obtained from the measuring points of the direct current grounding electrode circuit; a forward voltage traveling wave function and a backward voltage traveling wave function are obtained in a calculating mode; mathematical morphology gradient transformation is carried out to obtain a forward traveling wave gradient function and a backward traveling wave gradient function; the reflected wave of a fault point is confirmed through the forward traveling wave gradient function and the backward traveling wave gradient function; the time corresponding to the reflected wave of the fault point is used as fault time, and a fault distance is confirmed according to the fault time. The upper edge or the lower edge or the signal saltation point of transient signals can be extracted well, and therefore the reflected wave of the fault point can be distinguished accurately. Therefore, the accurate fault time can be obtained, and the accuracy of the fault distance can be greatly improved.
Owner:EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
Device and method for preparing carbon/carbon composite material with gradient distribution density
The invention relates to a device of carbon / carbon composite material of which the density distributes in gradient and a process for preparation. Basing on soaking method isothermal chemical vapor infiltration technology of preparing carbon / carbon composite material, the outer and inner surfaces of the precast member is filled with high concentration reacting gas and inert protective gas or low concentration reacting gas, using the concentration of the different reacting gas of the outer and inner surfaces to control gas to flow along the predetermined direction, remarkable reacting gas concentration gradient is radically formed along the member, using the different deposition rate of different reacting gas concentration under the condition of the same temperature to obtain the carbon / carbon composite material the density of which is outer high and inner low and is distributed in gradient. The invention can be used for researching solid rocket engine gradient function polybasic base composite material throat insert with different decomposition carbon content along radial direction and polybasic carbon base carbon / carbon composite material plane brake wheel and the like, which is suited for solid rocket engine throat insert, various plane carbon brake stator and the tail wheel structure.
Owner:XIAN AEROSPACE COMPOSITE MATERIALS INST
Method using laser quick forming producing HA/Ti gradient biological activity material
The invention discloses a method for preparing a HA / Ti gradient biological activity material by adopting laser rapid forming. The method introduces the conception of gradient function material, changes the mixture ratio of CaHPO4*2H2O+CaCO3 and titanium powder in a gradient way, and adopts the laser rapid forming technology to melt and cover the mixing material into the surface of titanium metal directly in hope of obtaining the medical gradient biological activity material with good bonding strength, thereby improving the proliferation and differentiation of the osteocyle on the metal surface, solving the difficulty of the early bonding between the metal implantation material and the bone, and providing a theoretical and experimental basis for better clinic application of titanium.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Weighted gradient based and color corrected interpolation
ActiveUS7256828B2High quality interpolationReduce computing costTelevision system detailsTelevision system scanning detailsPattern recognitionColor correction
The apparatus and method invented are operating upon a digital image signal obtained from an image sensor. The sensor is covered with different colored filters and is only able to record the color transmitted through each specific filter into the photosite or pixel. This type of sensor is known as a color filter array or CFA sensor. The different colored filters are arranged in a predefined pattern across the sensor. To obtain a full color image the missing color information is estimated by a set of weighed values obtained by an inverted gradient function. The set of weighted values is found from the neighboring pixels in the four compass directions, north, east, west and south or is found horizontally and vertically. The surrounding pixels are corrected by the chrominance channel to better fit the center pixel in the luminance channel, prior to using the gradient functions. The chrominance channel is interpolated in a similar manner and is also corrected to better fit the center pixel before the inverted gradient functions are applied.
Owner:GULA CONSULTING LLC
Ceramet material with gradient function for electrolyzing Al
The present invention relates to aluminum electrolysis, and is especially inert ceramet anode. The ceramet material has structure of at least two layers and is rod shaped, plate shaped or cup shaped. The ceramic phase is spinelle type composite oxide; and the metal phase is made of Cu, Ni, Co, Fe, Ag, Pt, Au and other metal or their binary or multiple-element alloy. The composite material with gradient function has excellent comprehensive performance under electrolysis, and the anode of the composite material needs no frequent replacement. Using the composite material of the present invention can alter the electrolytic bath structure, raise production efficiency, lower aluminum ingot producing cost, improve environment, and reduce power consumption.
Owner:CENT SOUTH UNIV +1
Silicon nitride based nano complex gradient function ceramic tool material and preparation thereof
The invention provides a silicon nitride-based nano composite functionally gradient ceramic cutter material and a preparation method thereof. The ceramic cutter material is provided with a five-layer symmetrical gradient level structure; the component contents of the symmetrical layers relative to a central layer are the same and the thickness of each layer is consistent; the components of each layer are all micron Si3N4, nano Si3N4, nano TiC, nano TiN, Al2O3 and Y2O3. The preparation method thereof is as follows: (1) preparing materials according to the content of each component in each layer; (2) dispersing the nano materials in each layer; (3) mixing the other materials in each layer with the dispersed nano materials to obtain the powder material of a composite ceramic material which disperses excellently; and (4) employing a powder layering paving method and a hot pressing sintering technique to carry out loading and sintering. The invention improves the anti-bending intensity and the fracture toughness property of the materials, and improves the fracture toughness property of the materials; while the gradients of the nano TiC and the nano TiN are arranged in layers, thus leading the mechanical property of the cutter material to be changed in stagewise gradient, and being capable of effectively easing the residual heat stress.
Owner:SHANDONG UNIV
Gradient function ceramic cutter material and preparing method thereof
The present invention relates to an Al2O3 / TiC symmetrical gradient-functional ceramic cutter material and its preparation method. Said cutter material has symmetrical double-directional composition distribution structure, and its preparation process has the following steps: adopting wet process to disperse mixed material, respectively preparing Al2O3 / TiC composite powder with different mixing ratio and adding micro sinternig adjuvant, drying and sieving, according to the designed mass ratio weighing composite powders with various different mixing ratios, making layer-by-layer powder lamination and filling, hot-pressing and sintering at 1700-1750 deg.C and 30 MPa, heat-insulating for 10-20 min., then cooling with furnace so as to obtain the invented cutter material with excellent various mechanical properties.
Owner:SHANDONG UNIV
Gradient descent calculation method for protecting privacy data
ActiveCN110084063AMeet the requirements of semantic securityHigh precisionDigital data protectionMachine learningComputation processResource Provider
Owner:UNIV OF SCI & TECH OF CHINA
Monocular vision based measurement method for terrain clearance of unmanned aerial vehicle
ActiveCN110455258ALow installation requirementsHow much calculationImage analysisHeight/levelling measurementTerrainVision sensor
The invention provides a monocular vision based measurement method for terrain clearance of an unmanned aerial vehicle. A series of ground scene images are acquired by a monocular electric focusing camera vision sensor, a definition evaluation function is proposed by utilizing the characteristic of high proportion of high-frequency energy of clear images, the images are evaluated on the basis of the proposed definition evaluation function, terrain clearance of the unmanned aerial vehicle is completed according to evaluation results, and height information is provided for landing, ascending ordescending of various small flying platforms such as unmanned aerial vehicles and the like. High-frequency energy is obtained with a gradient calculation method, image definition evaluation is realized by evaluating the amount of the high-frequency energy of the images; compared with direct calculation of a frequency domain, the method has a small calculation amount and meets the requirement of real-time performance of the system; compared with a gradient function, the evaluation results are described by frequency domain information, and noise resistance is better.
Owner:NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
Reinforcement learning system
ActiveUS8392346B2Evaluation can be shortenedDigital computer detailsMachine learningGradient functionReinforcement learning
A reinforcement learning system (1) of the present invention utilizes a value of a first value gradient function (dV1 / dt) in the learning performed by a second learning device (122), namely in evaluating a second reward (r2(t)). The first value gradient function (dV1 / dt) is a temporal differential of a first value function (V1) which is defined according to a first reward (r1(t)) obtained from an environment and is served as a learning result given by a first learning device (121). An action policy which should be taken by a robot (R) to execute a task is determined based on the second reward (r2(t)).
Owner:HONDA MOTOR CO LTD +1
Slip casting preparation method for gradient materials in movement magnetic field
InactiveCN102225466AChange the strength of the magnetic fieldChange the speed of movementInorganic material magnetismGradient materialSlurry
The invention discloses a slip casting preparation method for gradient materials in a movement magnetic field, and the method comprises the following steps: 1) preparing a semi-hydrated gypsum mold; 2) mixing powder of different magnetisms with water or a non-aqueous solvent in a certain proportion, stirring in a ball mill into even dispersed serous fluid, and pouring; 3) applying the movement magnetic field with magnetic field intensity of 0.1-10T, and acting once or multiple times; and 4) drying, sintering and forming. The method has the advantages of being capable of obtaining gradient materials with different distributed gradients by changing the magnetic field intensity, movement velocity and magnetic field action times, greatly simplifying the procedures for preparing the materials with a gradient function by utilizing the mature ceramic grouting and forming method, and greatly lowering the cost.
Owner:ZHEJIANG UNIV
Technique for preparing ceramic nozzle possessing gradient function for coal water slurry
The present invention relates to a gradient function ceramic coal-water slurry nozzle and its preparation method. Said invention uses SiC as base body, and uses (W, Ti) C solid solution as reinforcement phase, and adopts hot-pressing sintering process to prepare the invented gradient function ceramic coal-water slurry nozzle. As compared with general homogeneous aramic coal-water slurry nozzle its nesistance to heat shocks can be obviously raised.
Owner:SHANDONG UNIV
Adaptive learning rate wavelet neural network control method based on normalization lowest mean square adaptive filtering
ActiveCN103971163AFast convergenceImprove tracking efficiencyNeural learning methodsAdaptive learningActivation function
The invention relates to the technical field of wavelet neural network optimization, in particular to an adaptive learning rate wavelet neural network control method based on normalization lowest mean square adaptive filtering. The adaptive learning rate wavelet neural network control method comprises the steps that a control system model is built; unitization is conducted on all weight values of a wavelet network by layer; wavelet neural cell weight value optimization is carried out; an error signal and training cost are figured out; segment processing is conducted on derived functions of an activation function through a step function; fuzzy rules of fitting the derived functions are made; a membership function is determined; the proportion of each fuzzy rule in a derived function value is determined; a fuzzy system is output, and the activation function is displayed in a linearization mode; induction local areas of all neural cells are determined, and the neural cells are output; each local gradient function is solved; adjustment of the learning rate is conducted by an output layer in an adaptive mode; the range of the learning rate of the output layer is determined; the learning rate of a hidden layer is adjusted; neural cell synapse weight values are trained; a tracking control signal is output; closed-loop feedback control is completed. According to the adaptive learning rate wavelet neural network control method based on normalization lowest mean square adaptive filtering, the rate of convergence can be increased, and computation complexity can be reduced.
Owner:HARBIN ENG UNIV
Method and Apparatus for Multimedia Queue Management
ActiveUS20130089107A1Data switching by path configurationSelective content distributionFrame basedRate change
Methods and systems for a multimedia queue management solution that maintaining graceful Quality of Experience (QoE) degradation are provided. The method selects a frame from all weighted queues based on a gradient function indicating a network performance rate change and a distortion rate caused by the frame and its related frames in the queue, and dropping the selected frame and all its related frames, and continues to drop similarly chosen frame until a network performance rate change caused by the dropping frame and its related frames meets a predetermined performance metric. A frame gradient is a distortion rate divided by a network performance rate change caused by the frame and its related frames, and a distortion rate is based on a sum of each individual frame distortion rate when the frame and its related frames are replaced by some other frames derived from remaining frames based on a replacement method.
Owner:FUTUREWEI TECH INC
Magnetic layer with high permeability backing
InactiveUS20050064242A1Enhanced magnetic gauss levelIncrease the magnetic field strengthManufacture head surfaceCoating by extrusionHigh concentrationPolymer science
A magnetic article has a magnetic layer having magnetized particles dispersed in a natural or synthetic resin binder and an adjacent high-permeability layer having high-permeability particles dispersed in a natural or synthetic resin binder. The magnetic article may be prepared by co-extruding a mixture of magnetizable particles in a binder and high-permeability particles in a binder through a single die to produce an integral gradient function article having a region of high concentration of magnetizable particles adjacent to one surface of the article and a region of high concentration of the high-permeability particles adjacent to another surface of the article, and magnetizing at least a portion of the magnetizable particles.
Owner:DANA AUTOMOTIVE SYST GRP LLC
Heat preservation modular structure applied to high-temperature pipeline heat transfer
The invention discloses a heat preservation modular structure applied to high-temperature pipeline heat transfer. The structure comprises stainless steel thin films, a gradient function heat-preservation core material, a temperature sensor and a vacuum gauge, the stainless steel thin films are subjected to seamless welding, and the gradient function heat-preservation core material is composed of a ceramic fiber paper layer, a fiberglass paper layer and an aluminum-plastic film vacuum heat insulation plate. All parts synergistically take effects, and the heat preservation property is greatly improved. The temperature sensor is located on the inner surface of the heat preservation modular structure, and the vacuum gauge is located on an outer shell of the heat preservation modular structure. All the parts are integrally formed, the interior is vacuumized, optimization of the heat preservation effect is achieved, the overall heat conductivity coefficient is about 0.04 W / (m.K), and the thickness of the heat preservation layer is greatly decreased; and meanwhile through integrated structural design, construction of workers and subsequent maintaining and repairing are facilitated, the maintaining period is shortened, and economic benefits are greatly increased.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Automatic focusing system of digital camera for non-uniform sampling window planning based on golden section
InactiveCN102169275AMeet real-time requirementsReduce intensityMountingsFocusing aidsComputation complexityEnergy gradient
The invention discloses an automatic focusing system of a digital camera for non-uniform sampling window planning based on golden section. A method comprises the following steps of: carrying out the golden section on a shooting scene for many times in automatic focus window planning; carrying out non-uniform sampling on an area where golden section points are located; and endowing the non-uniform sampling area with different weight values by using an energy gradient function based on a green component as a focusing evaluation function. Therefore, complexity of calculation is reduced on the premise of guaranteeing the focusing accuracy of an imaging body and a background area, and a real-time requirement of the automatic focusing system of the digital camera is met.
Owner:SHANGHAI INFOTM MICROELECTRONICS
Image-based target point position detection method and apparatus, and electronic device
The invention discloses an image-based target point position detection method, belongs to the technical field of computers, and is used for solving the problem of low target point position detection performance. The point position detection method disclosed by the embodiment of the invention comprises the following steps: acquiring a plurality of image samples marked with real target point positions; calculating a loss value of the neural network model according to a variable through a loss function of the neural network model, adjusting parameters of the neural network model by taking the minimum loss value as a target, and training the neural network model; wherein the loss function is configured to monotonically increase relative to the absolute value of a variable, the gradient function corresponding to the loss function is a monotonically decreasing function, the value of the gradient function is greater than 1, and the gradient function gradually approaches 1 when the variable approaches infinite; wherein the variable is used for representing a difference value between a true value and a predicted value, the true value is determined based on a sample label, and the predictedvalue is predicted through the neural network model.
Owner:BEIJING SANKUAI ONLINE TECH CO LTD
Method and System for Changing Image Density and Contrast
At least one of two enhancement methods for changing contrast and / or density are applied to an image. According to a first enhancement method the window width / level settings of the image are modified and according to a second enhancement method density and contrast of the image are modified by modifying a multi-scale representation of the image whereby modification is derived from at least two gradient functions determined at different scales, a gradient function at a specific scale specifying the dependency of contrast amplification at said scale as a function of density. The amount of modification obtained by applying either of said first and second enhancement methods is determined by the amount of movement of at least one indicium.
Owner:AGFA NV
De-noising method for ultrasonic testing of high-voltage bushing lead of transformer
ActiveCN109738519AHigh precisionImprove signal-to-noise ratioAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalSonificationTransformer
The invention relates to a de-noising method for ultrasonic testing of a high-voltage bushing lead of a transformer, comprising the following steps: performing wavelet decomposition on an ultrasonic echo signal reflected by the high-voltage bushing lead of the transformer, and performing signal analysis from a detail component and an approximate component; introducing an adaptive threshold methodbased on SURE unbiased estimation, adopting a gradient descent method by the adaptive wavelet threshold estimation, taking the gradient function deltalambda as an objective function, corresponding theminimum value of the gradient function deltalambda to the optimal threshold, introducing the Sigmoid function as a threshold function at the same time, and combining the above variables to obtain a new gradient function deltalambda; combining the grey wolf optimization algorithm with the adaptive threshold method, and optimizing the objective function by using the gray wolf algorithm; de-noisingeach detail wavelet component by using the gray wolf optimization adaptive optimal threshold, and performing wavelet inverse transform signal reconstruction on the de-noised detail component and approximate component, thereby obtaining a de-noised ultrasonic echo signal. Compared with the prior art, the invention has the advantages of improving the accuracy of ultrasonic detection and the like.
Owner:GUANGAN POWER SUPPLY COMPANY STATE GRID SICHUANELECTRIC POWER
Method for preparing hydroxyapatite nano composite coat with gradient function
InactiveCN101122042ACounteracts densification shrinkageCrack suppressionElectrophoretic coatingsApatiteTitanium alloy
A method of preparing a hydroxyapatite nano composite coating with gredient function relates to a method of preparing the hydroxyapatite nano composite coating on the surface of titanium or titanium alloy. The invention provides a method of preparing the hydroxyapatite nano composite coating with gredient function on the surface of titanium or titanium alloy by multi-layer electrophoretic codeposition of the hydroxyapatite nano powder and the metal A1 micro powder, reaction, sintering and heat treatment, so as to improve the bonding strength between the hydroxyapatite nano composite coating and the basal. The titanium or titanium alloy after mechanical finishing, alkaline washing and degreasing as well as acid etch treatment receive at least three times of electrophoretic deposition subsequently in the suspension with different Hap powder and A1 powder content in the order of gradually reduced content of A1; DC current is adopted to deposit the voltage 30 to 40V for 15 to 30 minutes; and then the sample reacts and receives sintering and heat treatment in a tube type resistance furnace to obtain the hydroxyapatite nano composite coating with gredient function, and the coating is not easy to crack during the preparation process.
Owner:XIAMEN UNIV
High-purity zirconium oxide refractory product with gradient function and preparation method thereof
Belonging to the field of refractory materials, the invention mainly relates to a high-purity zirconium oxide refractory product with gradient function and a preparation method thereof. The product contains no less than 98 wt% of ZrO2 containing a stabilizer; and a forming method of a blank for the zirconium oxide refractory product is isostatic pressing, machine pressure or vibration pressing ramming molding. The zirconium oxide refractory product is characterized in that the blank of the zirconium oxide refractory product is in an overall cylindrical structure formed by a plurality of spliced arc plates; and the refractory product has specific inhomogeneous internal microstructure. The zirconium oxide refractory product provided by the invention has the characteristics of high working temperature, high chemical purity and gradient changes in porosity, volume density, linear expansion coefficient and thermal conductivity along a specific direction, and can significantly prolong the service life of the zirconium oxide product in an ultra high temperature environment.
Owner:SINOSTEEL LUOYANG INST OF REFRACTORIES RES
Congestion control based wireless sensor network routing optimization method
InactiveCN105188084AAchieve effectivenessHigh energy consumptionNetwork traffic/resource managementNetwork topologiesTraffic capacityWireless mesh network
The invention belongs to the technical field of wireless communication, and particularly relates to a congestion control based wireless sensor network routing optimization method. The method comprises the steps of establishing a link gradient function from each node to a prior neighbor node according to geographical location information of the nodes; constructing a node queue model, and establishing a flow radius function of each link according to the data packet service rate of the nodes; constructing a link flow rate model among the nodes according to the established link gradient function and the flow radius function; establishing a routing forward probability function by the nodes according to difference in each link flow rate so as to complete establishment of routing; and establishing a congestion detection function so as to carry out real-time detection on the congestion degree of a network, and carrying out local routing maintenance once node congestion occurs. According to the invention, the link gradient function is established through using basic conceptions and principles in hydrology for reference, thereby sufficiently realizing effectiveness of node energy consumption, enabling energy consumption of the whole network to be optimized, and having good real-time performance and reliability.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
Ceramics coal-water slurry nozzle having two-way gradient function and method for making same
InactiveCN101033842AImprove thermal erosion and wear resistanceRelieve impact stressBurnersCeramic compositeDistribution law
A kind of two-way gradient function ceramics water coal liquid air spout and the manufacturing method it makes the A1203 as the basal body and makes the TiC or (W, Ti)C solid solution as the strengthening phase and the content of TiC or (W, Ti)C presents the two-way gradient variation along the air spout axial and the distribution law of the content decreases gradually from the air spout inlet to the middle and then increases gradually from middle to air spout outlet through allocating multiple kinds of ceramics composite powder and processing by strengthening ball polish, ridding, layer-by layer spreading, preliminary compression, and heat pressing sintering technology preparation. The inlet and outlet of the air spout have high flexibility and the middle if it has high degree of hardness used to release the heat stress of outlet area when the ceramics water coal liquid air spout working and the impact pressure of the inlet area and improve its heat-resistant ablating and abrasion ability. The ceramics water coal liquid air spout's heat-resistant ablating and abrasion ability is higher than the homogeneous ceramics water coal liquid air spout and the one-way gradient function air spout apparently and the use life is prolonged largely.
Owner:湖南工业大学陶瓷研究所
Ultrasonic solidification-friction stir composite added material manufacturing device and application method
ActiveCN110587166APromote interdiffusionImprove mechanical propertiesAdditive manufacturing apparatusWelding apparatusNumerical controlMetal foil
The invention provides an ultrasonic solidification-friction stir composite added material manufacturing device and an application method. The ultrasonic solidification-friction stir composite added material manufacturing device comprises a shell, a machining mechanism, a metal foil conveying mechanism, a driving mechanism, a cutting mechanism, a movable steering mechanism, an extrusion mechanism,an adjusting mechanism and locking universal wheels; the machining mechanism is fixedly connected into the shell; and the machining mechanism comprises a numerical control machining center, a controlpanel, a machining cavity, a substrate, a first electric slide rod, a first electric slide sleeve, a mounting plate, a connecting plate, a machining head, a transducer, an amplitude change rod, an insulation sleeve, a first cylinder, a first piston rod and a friction stir head. The ultrasonic solidification-friction stir composite added material manufacturing device can prepare high-performance metal samples; the mechanical performances of the samples are higher than forgings by 20-50%; and the device is low in size limiting, can machine large-size complex-structured parts, can from more thantwo metal materials according to working conditions and typical performance requirements of parts, and realizes preparation of heterogeneous / gradient function materials.
Owner:ZHEJIANG OCEAN UNIV
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