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60results about How to "Avoid design difficulties" patented technology
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Multi-modal image fusion method based on generative adversarial network and super-resolution network
InactiveCN109325931AImprove performanceAchieve integrationImage enhancementImage analysisDiscriminatorPattern recognition
The present invention relates to an image fusion method, in particular to a multimodal image fusion method, especially a multi-modal image fusion method based on a generative adversarial network and asuper-resolution network. The method is carried out according to the following steps of designing and constructing the generative adversarial network, wherein the network structure adopts a conceiveddepth residual neural network, and obtaining a generating model through the dynamic balance training of a generator and a discriminator; constructing the super-resolution network based on the convolution layer; inputting the multi-band / multi-mode source image into the generating model to obtain the preliminary fusion image; and then inputting the image into the trained super-resolution network toget the final fusion image with high quality. The method realizes the end-to-end neural network fusion of multi-band / multi-mode images, avoids the difficulties of image multi-scale and multi-direction decomposition and fusion rule design based on prior knowledge, and realizes the adaptive network fusion.
Owner:ZHONGBEI UNIV
Rolling bearing weak fault feature early extraction method
ActiveCN107560851ABreak through limitationsSuppress noiseMachine bearings testingGenetic modelsFrequency spectrumCorrelation function
The invention discloses a rolling bearing weak fault feature early extraction method. The method includes the following steps that: a sensor is utilized to pick up the vibration signals of a rolling bearing under an operating condition, and the vibration signals are adopted as signals to be analyzed; with the spectrum auto-correlation feature factor SACFF of a spectrum auto-correlation function adopted as a fitness function, a genetic algorithm is adopted to optimally search variation modal decomposition parameters; parameter combinations which are optimally searched by the genetic algorithm are selected to perform VMD (variation modal decomposition) processing on the signals to be analyzed, so that finite bandwidth intrinsic mode functions are obtained; components corresponding to local maximum feature factors of spectrum autocorrelation are selected to be subjected to spectrum autocorrelation analysis, so that a spectrum autocorrelation function graph can be obtained; and if the fault feature frequency in the spectrum autocorrelation function graph or the peak value of the frequency multiplication thereof reaches a set threshold value, it is indicated that an early weak fault occurs on the rolling bearing. According to the method of the invention, the respective advantages of the VMD and the spectrum autocorrelation analysis are combined, and therefore, limitations of the spectrum autocorrelation analysis method in extracting the weak fault feature information of the bearing can be broken through, and the earlier diagnosis of the weak fault of the rolling bearing can be realized.
Owner:HEFEI UNIV OF TECH
Inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter
InactiveCN102832809AImprove efficiencyLittle impact on operationEfficient power electronics conversionApparatus without intermediate ac conversionCapacitanceSoft switching
The invention discloses an inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter which comprises a power switch tube, a clamping diode, a rectification diode, a coupling inductor and a regulating inductor and has the following basic functions: the zero-current turning-on of the power switch tube is realized through utilizing the leakage inductance of coupling inductance; the soft turning-off of the power switch tube and lossless transfer of leakage inductance energy are realized through the passive clamping circuit consisting of the clamping diode and a clamping capacitor; the high-gain output of the converter is realized through utilizing a second winding of the coupling inductor and the switch capacitor; the turn ratio of the coupling inductance is prevented from being over-high by utilizing the inductance to regulate and output voltage range; the volume of a magnetic element is reduced by utilizing the bidirectional operation of the magnetic element; the converter is simple in structure, is convenient to control; and loss energy elements are not arranged in the circuit, and the efficiency can be improved. The inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter provided by the invention is mainly applied to the field of renewable energy source and novel energy source power generation with low working voltage level, such as photovoltaic power generation and fuel battery power generation.
Owner:YANSHAN UNIV
Method of optimallying designing closed-winding permanent magnet brushless DC motor
ActiveCN103678783AStrong differential evolution stabilityImprove search abilityGenetic modelsSpecial data processing applicationsPower factorTorque density
The invention relates to a method of optimallying designing a closed-winding permanent magnet brushless DC motor on the basis of differential evolution algorithm and finite element time-stepping method. The method includes: according to the particularity in the closed-winding permanent magnet brushless DC motor, by considering a body and a control part of the motor, using the cost in torque density and unit torque of a system as an optimization target; using constraint conditions such as parallel branch circulation, power factor, efficiency, torque output, fluctuation, heating, structural strength and the like. The method has the advantages that design schemes of each generation are varied, intersected and selected for differential evolution, and a Pareto optimal solution set is updated continuously; in order to ensure design accuracy, the finite element time-stepping method is applied to accurate dynamic simulation computation of the closed-winding permanent magnet brushless DC motor; the reliable and accurate method is provided for the design optimization of the closed-winding permanent magnet brushless DC motor, and the development of the novel motor is quickened.
Owner:南京华乘电气科技有限公司
Novel low-temperature combined cooling, heating and power (CCHP) system based on heat pump
ActiveCN103075841AIncrease profitSimple structureClimate change adaptationHeating and refrigeration combinationsThermal energyCooling tower
The invention relates to a novel low-temperature combined cooling, heating and power (CCHP) system based on a heat pump. Currently, no novel low-temperature CCHP system based on the heat pump with a simple structure and a reasonable design exists. The novel low-temperature CCHP system based on the heat pump comprises a high-pressure steam pipe, a steam turbine, a power generator, a condenser and a boiler connecting pipe, and is characterized by also consisting of a heating low-pressure steam pipe, a heating condensate pipe, a power plant after-heat single-effect heat pump unit, a refrigeration single-effect absorbing heat pump unit, a heat pump unit loop pipe, a loop circulating pump, a user refrigeration pipe, a cooling tower, a cooling tower water inlet pipe, a cooling tower water outlet pipe, a cooling water circulating pump, a power plant circulating cooling water pipe, a heat pump cooling tower, a cooling tower circulating pipe, a heating single-effect absorbing heat pump unit, a heating heating pipe, a heat pump circulating pipe and a user heating pipe; the heating low-pressure steam pipe is connected with the refrigeration single-effect absorbing heat pump unit; and the heating condensate pipe is connected with the power plant after-heat single-effect heat pump unit. The novel low-temperature CCHP system based on the heat pump has the advantages of reasonable structural design, energy saving, environmental friendliness and high heat utilization rate.
Owner:杭州全能星科技有限公司
Array antenna structure and design method thereof
ActiveCN106911011ADoes not affect impedance characteristicsSimple designParticular array feeding systemsAntenna arrays manufactureElectricityArray data structure
The invention provides an array antenna structure and a design method thereof, wherein the array antenna structure comprises a feeding network and a radiation sub-array. The feeding network comprises a power divider and a plurality of phase shifters. The power divider is a substrate integrated waveguide T-type power divider. The phase shifter has a combined structure in which a substrate integrated waveguide and a microstrip line are combined. The T-type power divider comprises a signal input end and a plurality of signal output ends which are parallelly arranged. Each signal output end is connected with one phase shifter. The width of the substrate integrated waveguide of the substrate integrated waveguide T-type power divider is same with that of the substrate integrated waveguide used as phase shifter input. The array antenna structure and the design method thereof have advantages of reducing self radiation of a supply network, reducing sidelobe level of the vertical surface of the array antenna and reducing effect of machining precision to the supply network for preventing antenna performance reduction. Furthermore simple design and convenient adjustment are realized. Furthermore the array antenna structure and the design method thereof can improve design efficiency of engineering technical personnel.
Owner:SOUTHEAST UNIV +1
Low voltage interface circuit
ActiveUS7956641B1Avoid gate oxide degradation/breakdownHighly robustPulse automatic controlCurrent/voltage measurementAudio power amplifierLow voltage
An improved interface circuit is provided herein for translating a relatively high input voltage into a relatively low output voltage using only low voltage transistors and a single, low voltage power supply. According to one embodiment, the interface circuit includes a power supply, a pair of input transistors with source terminals coupled together for receiving a relatively low voltage from the power supply, and a current sense amplifier with a pair of input terminals, each coupled to a drain terminal of a different one of the pair of input transistors for receiving a pair of differential currents and for generating a pair of differential voltages therefrom.
Owner:CYPRESS SEMICON CORP
Ultra-broadband analogue signal parallel sampling system based on accidental projection
InactiveCN101247137AEasy to implementAchieving Process StabilityAnalogue-digital convertersTransmissionAnalog signalBroadband
The present invention discloses a parallel sampling system basing on the super-wideband which is projected randomly, and the invention mainly settles the problem of complex realization and no suitability for processing the common super-wide band in the homogeneous system. The system is mainly composed of a function generating module, a parallel sampling module and a linear operating module. In the system the function generating module adopts a pseudorandom sequence generating module for generating a group of pseudorandom sequence for inputting to the parallel sampling module. The parallel sampling module realizes the projection operation of the upper-wide band analog signal on the self-contained pseudorandom space and obtains the digital projection coefficient signal for inputting to the linear operating module. The linear operating module adopts the M-input and M-output linear structure and conveys the output projection coefficient signal of the parallel sampling module to the parallel digital sampling signal and then outputs. The invention has the advantages of low complexity in the circuit operation, being easily realized and broad applying sphere. The invention can be used for executing digitization sampling processing to the super-wideband signal.
Owner:XIDIAN UNIV
Self-adaptive configuration method and system for M.2 hard disks on server boards
InactiveCN107092570AAchieve adaptiveShorten the development processElectric digital data processingComputer moduleSelf adaptive
The invention discloses a self-adaptive configuration method and system for M.2 hard disks on server boards. The method comprises the following steps of: 1, setting a PCH high-speed interface module between a CPU and an M.2 interface module; 2, acquiring the state of the 69th PIN of the M.2 interface module; 2, judging the type of an accessed M.2 hard disk according to the state information of the 69th Pin; and 4, configuring a PCH high-speed interface according to the type of the M.2 hard disk. The system comprises the PCH high-speed interface module, the M.2 interface module and a self-adaptive configuration module, wherein the PCH high-speed interface module is connected with a server CPU through a DMI bus; the M.2 interface module and the self-adaptive configuration module are respectively connected with the PCH high-speed interface module; and the M.2 interface module is connected with the M.2 hard disk. According to the method and system, different M.2 hard disks can be automatically recognized, the design difficulty is reduced and the cost is reduced.
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
Pure electric drive system
InactiveCN101386258AReduce no-load lossIncrease profitSpeed controllerElectric propulsion mountingMotor driveElectric machinery
The invention provides a pure motor driving system which includes a battery pack, a gear box and a main drive motor; the battery pack supplies power to the main drive motor; the main drive motor inputs a power to the gear box; wherein, the main drive motor includes a first main drive motor and a second main drive motor. As the two main drive motors with relative lower power are adopted for replacing the existing main drive motor with a large power, therefore, the pure motor driving system can effectively solve the problems that the main drive motor with a large power can not be arranged as the space of a front cabin is not enough and is difficultly designed; devices with large power are difficultly designed and selected; the main drive motor with a large power affects the balance of the integral car, etc.
Owner:BYD CO LTD
Superfluid helium low-temperature cycle system
ActiveCN108036538AOverall small sizeMeet the needs of long-term maintenance-free operationCompression machinesProcess engineeringRefrigeration
The invention relates to the technical field of low-temperature refrigeration, in particular to a superfluid helium low-temperature cycle system comprising a compressor unit, a helium liquefaction unit, a first storage tank, a second storage tank and a superfluid helium cycle unit. The ejector-based superfluid helium cycle system is designed, thus a mechanical moving part is omitted for existing superfluid helium cycle, design difficulties of these mechanical moving parts are avoided, the requirement of long-term maintenance-free operation of the low-temperature cycle system is met, meanwhile,reliability of cycle operation is improved, technical risk is lowered, and the size of the whole low-temperature cycle system is kept more compact.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Controller of three-level output single-phase step-up power factor correcting circuit
InactiveCN1421976ARapid responseSimple designBatteries circuit arrangementsEnergy industryElectrical batteryHemt circuits
The control circuit of three-level output single-phase Boost PFC circuit with both commercial power input PFC function and battery step-up function includes input voltage sampling part, output voltage sampling part and control loop part. The input voltage sampling part includes battery input voltage signal sample circuit to convert battery voltage into signal BATTSN, commercial power input voltage signal sample circuit to convert the commercial power input voltage into signal ACSN, selecting circuit to feed the signal BATTSN to ACSN to subsequent effective value filter circuit with the gated signal being also used as the current following signal as control loop input, and effective value filter circuit to filter the signal BATTSN or ACSN or obtain the effective value signal for the control of the loop. The present invention is easy to design and debug.
Owner:ZTE CORP
Polylactic acid/polyester alloy and preparation method thereof
The invention relates to a polylactic acid / polyester alloy and a preparation method thereof. The polylactic acid / polyester alloy comprises the following components in percentage by weight: polylactic acid, polyester, a compatilizer, a flexibilizer, an antioxidant and a lubricant. The preparation method comprises the following steps: firstly, proportioning the raw materials and mixing at a room temperature; and respectively carrying out melting extrusion, carrying out ultrasonic treatment at the first late stage, extruding at the second stage and pelletizing, so as to obtain degradable, high-impact-resistant and high-heat-resistant polylactic acid / polyester alloy. Compared with an existing method, the controllable ultrasonic treatment is utilized; and a similar polylactic acid-g-polyester structure is formed by in-situ reaction, so that the heat resistance of the polyester and the biodegradability of the polylactic acid are reserved; and meanwhile, a toughening system with a core-shell structure is formed in an alloy system through interface interaction of a special toughening compatilizer, so that the alloy product with high impact resistance, high heat resistance and high biodegradability can be obtained.
Owner:FINE BLEND POLYMER SHANGHAI CO LTD
Active antivibrator and active vibration-proof method of overhead transmission line
ActiveCN101859995AReduce vibrationAvoid design difficultiesDevices for damping mechanical oscillationsSingle motor speed/torque controlEngineeringControl circuit
The invention discloses an active antivibrator and active vibration-proof method of an overhead transmission line. The active antivibrator comprises a shell, a power source, a control circuit, an electric motor, a transmission mechanism and a vibration-proof actuating mechanism, wherein the shell is provided with a fixing element which is used to fix the antivibrator on a line, the control circuit, electric motor and transmission mechanism are arranged in the shell and the power source provides electrical energy; the control circuit controls the movement of the electric motor, the electric motor drives the vibration-proof actuating mechanism to move and change the centre-of-gravity position through the transmission mechanism so as to counteract the vibration of the lead by means of reaction and realize the aim of inhibiting the breeze vibration of the lead.
Owner:CHINA ELECTRIC POWER RES INST
PCB for inhibition of transmission line weaving effect and design method thereof
InactiveCN108347826AAvoid design difficultiesSuppress weave effectHigh frequency circuit adaptationsPrinted circuit aspectsYarnGlass fiber
The present invention provides a PCB for inhibition of a transmission line weaving effect and a design method thereof. The PCB comprises a transmission dielectric layer which is provided with a transmission line, the transmission dielectric layer comprises a fiberglass piece and adhesive piece materials, the fiberglass piece is formed by weaving glass fiber yarns, the weaving densities of the glass fiber yarns are a length X and a width Y, the window sizes of the adhesive piece materials between the glass fiber yarns is a length A and a width B, distances a pair of difference lines P and N inthe transmission line comprises a distance in a parallel direction and a distance in a vertical direction, the distance in the parallel direction is A+X value, and the distance in the vertical direction is B+Y value to ensure the impedance matching of the difference lines P and N. According to the PCB for inhibition of the transmission line weaving effect and the design method thereof, the impedance line width is designed according to the weaving density of the transmission dielectric glass fiber yarns to solve the design difficulty of a current PCB transmission line, inhibit the weaving effect and ensure the integrality and signal propagation quality of high-speed signal transmission.
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
Long-span concrete prismatic surface arch reticulated shell roof structure and manufacturing method thereof
PendingCN107893500AGuarantee the construction qualityAvoid design difficultiesBuilding roofsArchitectural engineeringStructural engineering
The invention discloses a long-span concrete prismatic surface arch reticulated shell roof structure and a manufacturing method thereof. The prismatic surface of the structure is internally connectedto a round curve face, after a giant cylindrical bearing grid is formed by a main folding arch and a regression line beam, dense rib flat plates are divided in the giant grid, roof slope toes are supported on a side frame beam, after a gutter is formed to bear roof thrust by cooperating with the side frame beam, the thrust is transmitted to an anti-thrust structure composed of an inclined rod anda side frame column, and a roof end is supported on a gable wall frame. Manufacturing of the structure can adopt a total cast-in-place concrete mode or prefabricated method. The long-span concrete prismatic surface arch reticulated shell roof structure is applied to roofs of buildings such as warehouses, convention and exhibition and auditoriums, and has the advantages of being good in durability,high in rigidness, high in bearing capacity, low in construction cost and the like.
Owner:GUIZHOU UNIV
Series sewage intercepting collection pipe method for treating urban black and odorous water body
InactiveCN106545069AImprove collection effectComplete closureSewerage structuresSewage drainingMunicipal sewageRevetment
The invention discloses a series sewage intercepting collection pipe method for treating an urban black and odorous water body. According to the method, bearing mechanisms corresponding to confluent main pipes are arranged on a river channel revetment, or positions corresponding to the confluent main pipes in a river channel are piled, the bearing mechanisms or piles are used for supporting and jacking the confluent main pipes, a water outlet of each confluent main pipe is communicated with an intercepting branch pipe, an intercepting well is arranged at a water outlet of each intercepting branch pipe, all the intercepting wells are communicated with each other through pipelines to form intercepting main pipes, a water outlet of each intercepting main pipe is communicated with a municipal sewage pipe network, sewage and rainwater intercepted by the intercepting wells are conveyed to the municipal sewage pipe network through the intercepting main pipes, sewage of the municipal sewage pipe network is communicated to a water inlet of a sewage treatment plant for treating the received sewage, and treated effluent is drained into the river channel. The source of the black and odorous water body is treated, and the method is simple, efficient and low in investment cost.
Owner:NANJING UNIV OF TECH
Wall board structure of fixed hydraulic balance extra large storage tank
ActiveCN102229377ASolve the problem of running down rainwaterReduce construction costsLarge containersEngineeringBoard structure
The invention relates to a wall board structure of a fixed hydraulic balance extra large storage tank. The structure comprises an inner tank and an outer tank, wherein the inner tank is used for storing materials; the outer tank is wrapped by the inner tank; a distance is arranged between the outer side wall of the inner tank and the inner side wall of the outer tank so as to form an annular space for containing liquid for balancing pressure; and the structure is characterized in that a plurality of structural steel connecting pieces for improving the bearing capability of the side wall of the inner tank are arranged between the inner side wall of the outer tank and the outer side wall of the inner tank. Compared with the prior art, the invention really realizes the manufacturing of an extra storage tank, has the advantages of low the manufacturing cost, and ensures the welding quality.
Owner:CHINA PETROLEUM & CHEM CORP +2
Microscopic imaging objective lens for fiber core identification of optical fiber fusion splicer and imaging method thereof
PendingCN110824682AHigh magnificationGuaranteed High Precision AlignmentMicroscopesCoupling light guidesMicroscope objectiveImage resolution
The invention discloses a microscopic imaging objective lens for fiber core identification of an optical fiber fusion splicer and an imaging method thereof. The microscopic imaging objective lens hasa coaxial transmission type optical imaging structure and comprises a front group formed by double gluing of a concave-convex spherical positive lens and a crescent-shaped spherical negative lens anda rear group formed by double separation of a double-convex spherical positive lens, a crescent-shaped spherical negative lens and a crescent-shaped spherical thick positive lens, wherein the front group and the rear group are arranged successively in a light incident direction. According to the invention, the imaging objective lens has advantages of high resolution, small distortion, good imagingperformance, long optical cylinder, low processing cost, simple and compact structure and the like; the imaging performance of the imaging objective lens reaches the diffraction limit; the resolutionis as high as 2 micrometers and the diameter is far higher than the diameter of the end surface of an optical fiber by 10 micrometers; and the magnification reaches 5 times and fine imaging can be carried out on the optical fiber end face, high-precision alignment is realized, and the type of the optical fiber can be accurately recognized. Meanwhile, problems of large welding loss, unstable welding and the like in the prior art are solved; and the use requirements of a fiber core alignment type optical fiber fusion splicer are met.
Owner:苏州信沃特光电科技有限公司
Display device
InactiveCN101751824AReduce transmission lossAvoid design difficultiesMechanical apparatusPoint-like light sourceLight guideDisplay device
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
A serial port loading device and method for an embedded chip
ActiveCN109558359AImprove mass production efficiencyImprove reliabilityElectric digital data processingUSBControl circuit
The invention discloses a serial port loading device and method for an embedded chip, and relates to the field of embedded chips, the serial port loading device comprises an embedded chip, a hardwarecontrol circuit, a USB conversion chip and an upper computer; and the embedded chip is in communication connection with the upper computer through the hardware control circuit and the USB conversion chip, so that the embedded chip and the upper computer realize serial port file loading. According to the invention, universal downloading and burning of the embedded chip are realized on the whole, the selection range of materials of the FLASH memory in the later stage is expanded, the ROM storage space and GPIO resources of the embedded chip are saved, and the design difficulty and risk of the ROM in the aspect of burning are avoided.
Owner:上海移芯通信科技股份有限公司
Lever type low-temperature thermal switch for coupling low-temperature refrigerator and cooled device
ActiveCN104241020AImprove performanceLarge proportionThermal switch detailsThermal expansionEngineering
The invention relates to a lever type low-temperature thermal switch for coupling a low-temperature refrigerator and a cooled device, which comprises the components of: a metal cold end and a metal hot end which are respectively connected with a cold head and a refrigerated element of the refrigerator; a ceramic fixing cylinder for fixedly connecting the cold end with the hot end; a contraction rod which contacts with the cold end; a cylindrical contact block which switches off and on the thermal switch; a metal lever and a ceramic supporter which matches with the metal lever; and an elastic heat-conductive strip with a contraction pretightening force. Through contraction and restoring of the contraction rod with a thermal expansion coefficient, displacement of the lever is generated, thereby realizing contact and separation between the cylindrical contact block and the cold end. Different material selections and lever proportions can realize convenient adjustment for gap size. Requirements for normally open, normally closed and opening / closing in actual operation can be satisfied. The lever type low-temperature thermal switch further has advantages of high unidirectional performance, sensitive reaction, small size and low cost.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Control method of AC-DC converter, control device, output system and storage medium
ActiveCN108631621AAvoid design difficultiesReduce R&D costsAc-dc conversionElectrical controlDc converter
The embodiment of the invention provides a control method of an AC-DC converter, a control device, an output system and a storage medium, and relates to the technical field of electrical control. Thecontrol method comprises the steps of obtaining a three-phase input parameter, a resonance parameter and a direct-current output parameter of the AC-DC converter, and determining a working mode of theAC-DC converter according to the three-phase input parameter and the direct-current output parameter; determining a state diagram of the AC-DC converter under the working mode according to the three-phase input parameter, the resonance parameter and the direct-current output parameter; obtaining the duration of each excitation state according to the parameters of each excitation state in the state diagram; and controlling the PWM conduction duration of a corresponding switch transistor in a switch matrix of the AC-DC converter according to the duration of each excitation state. When PWM control is adopted, the working frequency of the switch transistors is fixed, and particularly high performance requirements for input and output filter circuits are avoided, and therefore the technical problem that the design of the AC-DC converter is difficult due to the fact that the PDM is adopted is avoided, and the research and development cost of the AC-DC converter is reduced.
Owner:SOUTHWEST JIAOTONG UNIV
Lithium oxide centrifugal bead-making method and device
ActiveCN104200850AGuaranteed high quality moldingAvoid design difficultiesNuclear energy generationThermonuclear fusion reactorLithium oxideNuclear fusion
The invention discloses a centrifugal bead-making method of lithium oxide beads in nuclear fusion blankets and belongs to the technical field of material forming and control. The lithium oxide centrifugal bead-making method comprises the following steps that molten or pulped lithium oxide is dripped or flows into a rotating shaft disc, under the action of centrifugal force, the lithium oxide is made into beads, and the beads are collected and cooled through coolants to achieve fixing and forming. The lithium oxide bead-making process and device is simple in operation, universal and economic and applicable to preparation of various lithium oxide beads through a melting method or a wet process, the discharging and ball-making speed is fast, design and manufacturing difficulty of the discharging hole and the bead-making device is avoided, yield and particle size of made balls can be flexibly adjusted through the adjustment of material flow of lithium oxide and / or the rotating speed of the shaft disk, convenience and high efficiency are obtained, and preparation scale of lithium oxide tritium breeding agent beads can be greatly improved.
Owner:INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
Plane-form frequency reuse antenna sub-reflection surface
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Large-scale substation key facility monitoring system of low-power wireless communication and method
InactiveCN109283959ARealize remote measurementEffective penetrationSimultaneous control of multiple variablesMonitoring systemDevice Monitor
The invention relates to a large-scale substation key facility monitoring system of a low-power wireless communication and a method. The system comprises an in-situ measurement and control device anda measurement and control background; the system further comprises a heater and a dehumidifier; the heater and the dehumidifier are installed in the closed cabinet of a substation; the in-situ measurement and control device is installed in the sealed cabinet, fire pool and cable trench of the substation; the in-situ measurement and control device monitors the temperature, humidity and liquid levelparameters of installation positions in real time and wirelessly transmits the temperature, humidity and liquid level parameters to the measurement and control background; and the measurement and control background starts and stops the heater or dehumidifier through the in-situ measurement and control device. Compared with the prior art, the system and method of the present invention can realizethe special monitoring of the key facilities of a large-scale substation.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Double-stator double-rotor flameproof motor
InactiveCN106374703AAvoid design difficultiesReduce usageDynamo-electric machinesDrive shaftEngineering
A double-stator double-rotor flameproof motor comprises first and second rotors, first and second stators, a transmission shaft, a binding post, a conjunction box, a casing, an end cap and a bearing cap; the first and second rotor are connected to the transmission shaft successively, the first and second stators sleeve the first and second rotors respectively, the binding post is assembled in the conjunction box, the end cap and the bearing cap are assembled on the casing, and three main leads of a winding of the first stator and three main leads of a winding of the second stator are connected to the binding post with the leads in the same phase in parallel connection. The design difficulty of the flameproof motor of the power of 315kW and voltage of 1140V is overcome effectively, requirement for the output power is satisfied in the aspect of electromagnetic performance, use of raw materials is reduced effectively, and the installation difficulty of the whole motor is reduced greatly.
Owner:NINGXIA NORTHWEST HORSE ELECTRIC MFG
Process for preparing 1,2-propylene glycol from biological glycerol through low-temperature and low-pressure hydrogenation
InactiveCN102399131AAvoid design difficultiesLow investment costOrganic compound preparationHydroxy compound preparationPtru catalystReaction temperature
The invention discloses a new process for preparing 1,2-propylene glycol from biological glycerol through low-temperature and low-pressure hydrogenation. In the method, the biologically prepared glycerol is used as a raw material, Cu-SiO2 catalyst is adopted, and the 1,2-propylene glycol is catalytically prepared under extremely mild reaction conditions in two hydrogenation steps, wherein during reaction of the first step, the glycerol is dehydrated under the action of the catalyst to generate an intermediate product acetol; and during the reaction of the second step, the acetol is hydrogenated under the action of the catalyst to generate the 1,2-propylene glycol. The process has the advantages of easiness and convenience in reaction process, easiness in operation, high controllability, low reaction temperature, low reaction pressure, high target product yield and the like.
Owner:SOUTHWEST RES & DESIGN INST OF CHEM IND
Inductance Adjusted Switched Capacitor Passive Clamp Soft Switching High Gain Boost Converter
InactiveCN102832809BImprove efficiencyLittle impact on operationEfficient power electronics conversionApparatus without intermediate ac conversionCapacitanceSoft switching
Owner:YANSHAN UNIV
System design method and electronic equipment
ActiveCN113037354ASimple designAvoid design difficultiesRadio transmissionSystems designEquivalent isotropically radiated power
The embodiment of the invention provides a system design method and electronic equipment. The system design method comprises the following steps: determining terminal type parameters; performing system design on the satellite communication system based on the terminal type parameter, wherein the terminal type parameters comprise at least one of the following factor items: a terminal antenna type, a terminal application scene, a terminal visual range, a terminal communication rate, a terminal moving speed, a transmitting antenna equivalent aperture of the terminal, a receiving antenna equivalent aperture of the terminal, maximum equivalent omnidirectional radiation power EIRP sent by the terminal, the equivalent temperature gain coefficient G / T received by the terminal, the maximum signal-to-noise ratio supported by the terminal, the maximum scheduling bandwidth of the terminal and the minimum access bandwidth of the terminal. According to the embodiment of the invention, the satellite communication system is simple and efficient in design.
Owner:DATANG MOBILE COMM EQUIP CO LTD
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