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61results about How to "No imbalance" patented technology
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Display panel and display device
ActiveCN109559639APrecise control of bend radiusAvoid overstretchingSolid-state devicesIdentification meansDisplay deviceEngineering
The invention discloses a display panel and a display device. The display panel comprises a flexible substrate, and the flexible substrate comprises a display area and a bending area positioned on atleast one side of the display area. The part, positioned in the bending area, of the flexible substrate is bent towards one side far away from the light-emitting face of the display panel, a support module is arranged at the bending inner side of the bending area, a first surface of the support module is bonded to the flexible substrate through a first bonding layer, the first surface is an arc-shaped surface, the radius of the first surface is equal to the bending radius of the bent area, thus the bending radius of the bending area can be accurately controlled, then the excessive stretching when the flexible substrate is bent is prevented, meanwhile, the support module can carry out support protection on the bending area, so that the dead bending of the bending area is prevented, the linebreakage of the bending area is avoided, and the reliability of the display panel is improved.
Owner:GUANGZHOU GOVISIONOX TECH CO LTD
Novel jig saw
Owner:NINGBO LUTZ TOOLS CO LTD
Outdoor large-cherry soil test fertilizer application method
An outdoor large-cherry soil test fertilizer application method comprises a step of soil nutrient detection, a step of fertilizer preparation amount calculation, and a step of fertilizer application, so the method reaches scientific and reasonable fertilizer application, and realizes the adjustment of measures according to local conditions, thereby the method has the advantages of no soil nutrient loss, imbalance, surface source pollution or soil acidification, proper fertilizer application, fruit quality improvement, no pollution, and no physiological diseases, and is especially suitable for the large-cherry fertilizer application.
Owner:招远市农业技术推广中心
Media file back source path determination method and device in CDN network
InactiveCN105897581AImprove accuracyNo imbalanceData switching networksData transmissionDistributed computing
The invention provides a media file back source path determination method and device in a CDN network. The method comprises the steps that finite edge nodes, relay nodes and source station nodes are selected from an edge node layer, a relay node layer and a source station node layer; the path value of a first path segment from a user to each edge node is determined; the path value of a second path segment from each edge node to each relay node is determined; the path value of a third path segment from each relay node to each source station node is determined; and according to the path value of each segment, a back source path is determined, wherein the back source path is the nearest to the user and reaches the source station nodes through the edge nodes and the relay nodes. According to the method, the real-time network conditions of all CDN network nodes are comprehensively considered; the accuracy of the back source path is improved; data transmission delay is reduced; and the user experience is improved.
Owner:LETV CLOUD COMPUTING CO LTD
Extruded expansion type biological fermentation feed and preparation and use method thereof
PendingCN110338275AImprove featuresImprove digestion utilizationFood processingClimate change adaptationBiotechnologyVitamin C
The invention relates to the field of microbial fermentation feeds, particularly discloses an extruded expansion type biological fermentation feed and a preparation and use method thereof, and aims atsolving the technical problems that the nutrition of an existing biological feed is easy to lose and not easy to preserve. The extruded expansion type biological fermentation feed is prepared from basic extruded expansion pellet feed and a compound fermentation solution, wherein the basic extruded expansion pellet feed comprises fish meal, shrimp meal, soybean meal, rapeseed meal, cotton seed meal, corn, flour, cassava pieces, bran, soybean oil, a vitamin premix, a trace element premix, monocalcium phosphate, vitamin C and choline chloride; the compound fermentation solution comprises a compound strain, a complex enzyme preparation, cane molasses or glucose and water. The preparation method comprises the steps that 10-30% of the compound fermentation solution is inoculated into the basicextruded expansion pellet feed, fermentation is carried out, and the extruded expansion type biological fermentation feed can be obtained. The biological fermentation feed meets the nutritional requirements of aquaculture animals, and can be effectively utilized, and beneficial bacteria and nutrients are not easy to lose but easy to preserve.
Owner:TONGWEI
Method of formula fertilization of Chinese chestnut after soil testing
InactiveCN104782298ANo lossNo imbalanceFertilising methodsColor/spectral properties measurementsSoil scienceBotany
The invention provides a method of formula fertilization of Chinese chestnut after soil testing. The method comprises the following three steps: detection of soil nutrients; calculation of formula fertilization amount; and fertilization. According to the invention, scientific and reasonable fertilization according to local conditions is realized, so soil nutrient loss and imbalance and non-point source pollution are prevented; proper fertilization is carried out, so Chinese chestnut has improved quality and does not suffer from physiological diseases; and the method is especially applicable to fertilization in a Chinese chestnut forest land.
Owner:韦江南
Electric reciprocating saw
InactiveCN102794503AReduce vibrationSimple structureMetal sawing devicesThrough transmissionCrankshaft
The invention discloses an electric reciprocating saw, comprising an enclosure and a motor which is used as a power source, wherein the motor is linked with reciprocating rods fixedly provided with saw blades through transmission mechanisms; two transmission mechanisms are arranged, have same structures and are arranged in parallel; each transmission mechanism comprises a large gear which is linked with an output end of the motor, a crank shaft fixed with the center of the large gear, and a swinging rod bearing arranged on the periphery of the crank shaft; the two large gears are respectively arranged at two sides of the tail end of the output end of the motor; the two reciprocating rods fixedly provided with the saw blades are arranged; and the swinging rod bearing in each transmission mechanism is connected with the respective reciprocating rod. The motor can drag the two large gears at the same time so that the two saw blades can do movements in opposite directions all the time so that the device can bear force in the opposite directions, resultant force of external force borne by the device is nearly zero and an unbalanced phenomenon does not happen; and therefore, the vibration caused by cutting is obviously reduced, the cutting is stable, the efficiency is high and the operation is safe. The relative position and the relative angle of a crank shaft body and a bearing inner ring are changed so that the saw blades have the two different working routes and the same reciprocating saw can meet the cutting requirements of workpieces with different textures at the same time.
Owner:NINGBO YINGFUSHENG BRAND INT
Media transport in rotor shaft
ActiveCN106464085ANo imbalanceReduce weightMagnetic circuit rotating partsMechanical energy handlingDelivery systemFlange
The invention relates to a hollow rotor shaft for the rotor of an electrical machine, having a cylindrical jacket, which terminates at both ends with end flanges, wherein a main journal is formed at each of the end flanges, wherein an access bore is provided at least in one of the main journals, said access bore forming access to the shaft cavity that is surrounded by a cylindrical jacket, wherein a conducting element is provided, which fits into the access bore such that the conducting element seals off from the shaft cavity and which leads through the surrounding shaft cavity to the other main journal, into which the conducting element likewise fits such that the conducting element seals off from the shaft cavity, wherein the conducting element allows a liquid or gaseous medium to be conducted through.
Owner:THYSSENKRUPP PRESTA TECCENTER AG
Mung bean planting, soil detecting and fertilizing method
InactiveCN105210694AProportional coordinationMeet nutrient needsFertilising methodsHorticulture methodsPoint source pollutionBiology
A mung bean, soil detecting and fertilizing method comprises the three steps of soil nutrient detection, fertilizing amount calculation and fertilizing, the proportion of N, P, K is scientifically and reasonably adjusted, and the soil nutrient proportion is coordinated. Thus, the fertilizer utilization rate is improved by more than 4%, the loss and imbalance of soil nutrients, non-point source pollution and soil acidification are not caused, the mung bean yield is improved, and the mung bean, soil detecting and fertilizing method is particularly suitable for fertilization in mung bean land.
Owner:郑佩芳
Soil measurement and fertilizer application method of rheum officinale
InactiveCN105309100AProportional coordinationPlay interaction effectFertilising methodsFertilizerSoil acidification
The invention provides a soil measurement and fertilizer application method of rheum officinale. The method is implemented through three steps of soil nutrition detection, fertilizer application amount calculation and fertilizer application; the matching of N, P and K is adjusted scientifically and reasonably, and the soil nutrition proportion is coordinated, so that the fertilizer utilization rate is raised by over 4% on average, the soil nutrition loss, unbalance, non-point source pollution and soil acidification can be avoided, the yield of rheum officinale is raised, and the soil measurement and fertilizer application method is particularly suitable for fertilizer application to a rheum officinale field.
Owner:付千祥
Battery sampling system
PendingCN108957334AImplement level shiftHigh precisionElectrical testingBattery packElectrical current
The invention provides a battery sampling system which comprises a battery pack with the series connection of a lowest battery, a second battery and a highest battery, a lowest battery sampling circuit corresponding to the lowest battery, a highest battery sampling circuit corresponding to the highest battery, a second battery sampling circuit corresponding to the second battery, and a current dynamic automatic-compensation circuit for dynamically and automatically compensating the sampling current input into the second battery sampling circuit. According to the battery sampling system provided by the invention, the problems of high power consumption, incapability of running low-power-consumption application, poor conversion precision and unbalanced cells in the battery pack in a battery pack voltage detecting circuit in the prior art are overcome.
Owner:CRM ICBG (WUXI) CO LTD
Flat wire conductor stator winding with two branches and motor
PendingCN111917211ATo achieve the purpose of equal resistanceSolve the imbalanceWindings conductor shape/form/constructionWinding factorElectrical conductor
The invention provides a two-branch flat wire conductor stator winding and a motor. The two-branch flat wire conductor stator winding comprises a stator body, stator slots, a flat wire conductor and an end part conductor, wherein z stator slots are arranged on the stator body; 2n layers of flat wire conductors are arranged in the stator slots; 2n layers of flat wire conductors in different statorslots are connected with each other through end part conductors to form a winding; every n layers of flat wire conductors are connected through end conductors to form a branch circuit. According to the flat wire conductor stator winding with the two branches provided by the invention, the problem of unbalanced branches in a motor in an existing flat wire winding mode is solved through the structure of the stator body, the stator slots, the flat wire conductors and the end part conductors; two branches formed in a flat wire winding mode are equal in resistance, high in winding coefficient, lowin winding harmonic content, sufficient in material utilization, small in end portion and wide in market application value.
Owner:厦门势拓御能科技有限公司
Junction terminal structure for transverse high voltage power device
ActiveCN106252393AReduce doping concentrationReduce concentrationSemiconductor devicesHigh pressureGate oxide
The invention provides a junction terminal structure for a transverse high voltage power device. The junction terminal structure comprises a linear junction terminal structure and a curvature junction terminal structure; the curvature junction terminal structure comprises a drain electrode N+ contact zone, an N type drift zone, a P type substrate, grid electrode polycrystalline silicon, a gate oxide layer, a P-well zone and a source electrode P+ contact zone; the N+ contact zone, the grid electrode polycrystalline silicon and the gate oxide layer in the curvature junction terminal structure are respectively connected with an N+ contact zone, a grid electrode polycrystalline silicon and a gate oxide layer in the linear junction terminal structure so as to form an annular structure; the N type drift zone is divided into N subzones which are 21, 22 ... 2N from an internal boundary to an external boundary; the drain electrode N+ contact zone encloses the subzones which are 21, 22 ... 2N. An N type dosage concentration at a junction between the N type drift zone and the P type substrate in a curvature junction terminal part in the junction terminal structure disclosed in the invention is much lower than that in a traditional structure, the N type drift zone can be effectively exhausted by the P type substrate, and therefore voltage resistance of a device can be well optimized.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Geometric ratio volatilization aluminum plate rolling technical oil suitable for heavy reduction rate and preparation method thereof
The invention discloses geometric ratio volatilization aluminum plate rolling technical oil suitable for a heavy reduction rate and relates to the technical field of metal rolling lubrication technical oil. The rolling technical oil comprises, by mass, 97-99% of base oil and 1-3% of an additive. The base oil has n-alkane content of 99.5% or more. The n-alkane contains, by mass, 25-27.2% of C13 n-alkane, 39-42.5% of C14 n-alkane, 27-29.1% of C15 n-alkane, less than 0.5% of C16 n-alkane and the balance C12 n-alkane. The additive comprises, by mass, 50-65% of trimethyl phosphate and 35-50% of triisobutyl phosphate. The base oil and the additive are stirred and then are filtered to form the technical oil. The technical oil effectively improves PB, basically keeps a boiling range, realizes geometric ratio volatilization, greatly improves aluminum processing enterprise product quality and reduces a production cost.
Owner:石家庄新泰特种油有限公司
Flexible liquid crystal module and flexible liquid crystal display device
InactiveCN107331298ALimit bloatEliminate warpingStatic indicating devicesOptical light guidesElectrical conductorLiquid-crystal display
The invention provides a flexible liquid crystal module. The flexible liquid crystal module comprises a back plate, LED light strips, light guide plates and diffusion plates, wherein the LED light strips, the light guide plates and the diffusion plate are sequentially arranged on the back plate; the upper surface of each light guide plate is planar, the lower surface of each light guide plate is curved, each light guide plate is divided into multiple array modules in a horizontal direction, each light guide plate facing the vertical direction of the LED light strips is divided into two plates, the side surfaces of every two light guide plates in the vertical direction are attached to two reflective sheets respectively, a gap is formed between every two adjacent light guide plates, and every two reflective sheets are connected through at least two elastic components; each LED light strip comprises a flexible circuit board, and multiple groups of electric conductors and LED chips which are printed on the flexible circuit board and in parallel connection, and each flexible circuit board is provided with multiple micro-arrays, wherein the heights of the micro-arrays are different, but the arc shapes formed by the micro-arrays are equal to the lower surfaces of the light guide plates. Thus, the expansion and support problems during heating are well solved, the structure is simplified, and the cost is saved.
Owner:YANCHENG HUAXU OPTOELECTRONICS TECH CO LTD
Three-plate aluminum alloy forged hub
The invention discloses a three-plate aluminum alloy forged hub, which comprises a rim front plate, a spoke middle plate and a rim rear plate, wherein the rim front plate, the spoke middle plate and the rim rear plate are in clearance fit and assembled and connected through fastening bolts; the spoke middle plate is provided with a protruding rib for preventing the rim front plate and the rim rear plate from radially shifting; and the protruding rib shields and blocks a gap of a joint of the spoke middle plate, the rim front plate and the rim rear plate in the hub. The rim front plate and the rim rear plate are forged by combination of an extrusion process and a spinning process; the assembly is close fit assembly; the concentric precision of the hub is within 0.2mm; complicated dynamic balance adjustment is not needed; the joint of the three plates is totally sealed so as to difficultly leak air; and the three-plate aluminum alloy forged hub has the characteristics of light weight, high concentric degree, simple assembly, attractive appearance, novelty and the like, and is particularly suitable for medium-to-high grade automobiles.
Owner:宁波奇宇特种轮毂有限公司
Multilayer door plate hot-pressing gluing device capable of continuously operating
PendingCN110936445AImprove insulation performanceNot easy to stickPlywood pressesVeneer pressesProcess engineeringRapid response
The invention relates to a multilayer door plate hot-pressing gluing device capable of continuously operating. The hot-pressing device is relatively advanced and excellent in the current automation technology. The door plate hot-pressing gluing device has the advantages that a door plate subjected to hot-pressing gluing is smooth in surface, high in gluing quality, low in noise in work, free of pollution and capable of automatic feeding and discharging easily, rapid response and precise control (with controllable repeated positioning precision) can be conducted on various door plates with different thicknesses, and the operation cost of the device is reduced by 80% compared with a traditional process. As an advanced manufacturing technology, the multilayer door plate hot-pressing gluing machine capable of continuously operating has the advantages of being wide in application range, clean in production process, capable of conveniently achieving automation, flexibility and intelligence,capable of improving product quality and labor productivity and the like.
Owner:吕子元
Three-plate aluminum alloy forged hub
The invention discloses a three-plate aluminum alloy forged hub, which comprises a rim front plate, a spoke middle plate and a rim rear plate, wherein the rim front plate, the spoke middle plate and the rim rear plate are in clearance fit and assembled and connected through fastening bolts; the spoke middle plate is provided with a protruding rib for preventing the rim front plate and the rim rear plate from radially shifting; and the protruding rib shields and blocks a gap of a joint of the spoke middle plate, the rim front plate and the rim rear plate in the hub. The rim front plate and therim rear plate are forged by combination of an extrusion process and a spinning process; the assembly is close fit assembly; the concentric precision of the hub is within 0.2mm; complicated dynamic balance adjustment is not needed; the joint of the three plates is totally sealed so as to difficultly leak air; and the three-plate aluminum alloy forged hub has the characteristics of light weight, high concentric degree, simple assembly, attractive appearance, novelty and the like, and is particularly suitable for medium-to-high grade automobiles.
Owner:宁波奇宇特种轮毂有限公司
Composite microbial symbiosis induction culture technology based on SOD (Superoxide Dismutase), microbial symbiosis culture agent and application of composite microbial symbiosis induction culture method and microbial symbiosis culture agent
The invention relates to the field of microbial symbiosis culture, in particular to a composite microbial symbiosis induction culture technology based on SOD (Superoxide Dismutase), a microbial symbiosis culture agent and application of a composite microbial symbiosis induction culture method and the microbial symbiosis culture agent. The microbial symbiosis culture induction method provided by the invention classifies target strains according to the demand for oxygen content; firstly, the strains with similar oxygen demand are combined and cultured to obtain a plurality of strain groups, theinduction of symbiosis culture is started from the strains with the lowest oxygen demand; by ensuring the amount of bioactive superoxide dismutase in the system and gradually increasing the oxygen content in culture conditions, the adaptability of the system is improved; when the oxygen content reaches a certain concentration, the strain groups with similar oxygen demand are added, and then the adaptability of the system to higher oxygen content is improved by ensuring the amount of the superoxide dismutase in the system and gradually increasing the oxygen content in the culture conditions; byrepeating the operation until symbiosis culture of all strain groups is finished, the microbial symbiosis culture agent can be obtained.
Owner:浙江黛君生物医药科技有限公司
Preparation method of Janus particles and application of Janus particles in cyclohexene hydration process
ActiveCN111804347ABoosts Hydration First Step ReactionImprove conversion rateOrganic-compounds/hydrides/coordination-complexes catalystsCatalystsHydration reactionMolecular sieve
The invention discloses a preparation method of Janus particles and application of the Janus particles in a cyclohexene hydration process. The preparation method of the Janus particles comprises the following steps: immobilizing an HZSM-5 molecular sieve subjected to acid modification or alkali modification through paraffin, and then carrying out silanization modification. Preferably, an acid modifier is phosphotungstic acid, and an alkali modifier is sodium carbonate. The molecular sieve is immobilized by the paraffin, so that one side of the molecular sieve is protected by the paraffin, andthe other side can be modified by a silanization reagent. Compared with the traditional amphiphilic catalyst, the amphiphilic catalyst prepared by using n-octyl trimethoxy silane as the modifier has the advantages that one surface is hydrophilic and the other surface is hydrophobic, so that the catalyst is more stable in the middle of a phase interface, the phase interface imbalance phenomenon isavoided, and the conversion rate is further improved.
Owner:YANTAI UNIV
Level transfer system suitable for multi-battery pack
ActiveCN107783049ALevel shift implementationLow misalignmentElectrical testingTransfer systemElectrical battery
The invention provides a level transfer system suitable for a multi-battery pack. The system comprises a battery pack, a first battery level transfer circuit, a top battery level transfer circuit anda second battery level transfer circuit, wherein the battery pack comprises a first battery, a second battery and a top battery; the first battery, the second battery and the top battery are connectedin series; the first battery level transfer circuit is connected with the cathode of the first battery and the anode of the top battery; the top battery level transfer circuit is connected with the cathode of the first battery, the cathode of the top battery and the anode of the top battery; and the second battery level transfer circuit is connected with the first battery level transfer circuit,the top battery level transfer circuit, the cathode of the first battery and the anode of the top battery. The level transfer system suitable for the multi-battery pack can realize the voltage level transfer of multiple batteries and obtain high-precision level transfer signals, and does not draw current from the corresponding battery during sampling, so as to avoid accelerating battery imbalancebecause the sampling circuit draws current from the respective corresponding battery.
Owner:CRM ICBG (WUXI) CO LTD
Locking ring
The invention relates to a locking ring for axially fixing a shaft part (3) in a ring part (1). The locking ring (5) has first partial areas (56, 57, 51, 53) which engage in the inner groove (21) after resiliently pressing together the locking ring (5) so that it can be placed in the inner opening (21) of the ring part (1), pushing the safety ring (5) into the area of the inner groove (4) and releasing and resiliently placing the locking ring (5). The locking ring also has second partial areas (52, 54, 55) that project from the inner groove (21) once the safety ring (5) has been placed in the inner groove (21) and which are resiliently pushed outward in a phase (7) of the shaft part (3) which has been pushed into the inner opening (2) so that the safety ring (5) can slide on the periphery of the shaft part (3) until it reaches the area of the peripheral groove (4) and the second partial areas (52, 54, 55) resiliently snap onto said peripheral groove.
Owner:轴造型工程公司
Pipeline robot based on image recognition technology and control method
InactiveCN106374394AAchieve self-balancingImprove adaptabilityCharacter and pattern recognitionApparatus for laying cablesGear wheelControl engineering
The invention discloses a pipeline robot based on an image recognition technology and a control method. The robot is characterized by comprising a first guide wheel, a second guide wheel, a third guide wheel and a fourth guide wheel and also comprises a main body part, wherein the first guide wheel and the main body part are connected by a first connection rod, the second guide wheel and the main body part are connected by a second connection rod, the third guide wheel and the main body part are connected by a third connection rod, the fourth guide wheel and the main body part are connected by a fourth connection rod, four gears which are engaged with one another are arranged at the bottom of the main body part and are a first gear, a second gear, a third gear and a fourth gear, the first gear and the first guide wheel are in chain transmission, the second gear and the second guide wheel are in chain transmission, the third gear and the third guide wheel are in chain transmission, and the fourth gear and the fourth guide wheel are in chain transmission.
Owner:SICHUAN JIUDINGZHIYUAN INTPROP OPERATIONS CO LTD
High-pressure sprayer
Owner:JINGJIANG WEIYI INTPROP SERVICE
Planetary gear
ActiveCN1871458ANo imbalanceMechanical actuated clutchesGear lubrication/coolingDrive shaftEngineering
The invention relates to a planetary gear, especially for machine tools, comprising a drive shaft which is connected to a sun wheel, a driven shaft which is connected to a planetary gear, and a hollow wheel which is connected to the housing in a first shift position, and to the sun wheel in a second shift position, also comprising a hub which surrounds the drive shaft in a concentric manner, and a sliding sleeve which also surrounds the hub in a concentric manner and is in contact with the hub when in a shift position. The sliding sleeve (5) has a centering diameter which is arranged in a concentric manner on the hub (6) on the end thereof oriented away from the hollow wheel (4). Said centering diameter overlaps with a centering band (8) which is embodied in a concentric manner on the axis of the hub when the sliding sleeve (5) comprising the hub (6) is in an engaged position.
Owner:ZF FRIEDRICHSHAFEN AG
Luggage with tow handle
A luggage bag (1) comprising opposed top (2) and bottom (3) ends with opposing front (5) and back (4) panels extending therebetween and roller means (8) provided only on the bottom (3) end, proximate to the back panel (4). The roller means (8) having a single axis of rotation which is parallel to the leading edge of the back panel, and at least one substantially rigid retractable towing pole (11) which is moveable between a retracted position in which it is retracted into the bag so as to lie proximate and substantially parallel to one side of the bag, and an extended position in which it extends from the top end of the bag. The towing pole (11) having a handle (11a) proximate to its end which, in the extended position, is remote from the bag, said handle (11a) being offset from the centreline of the back panel (4).
Owner:FALCON INNOVATIONS NORTHAMPTON
Planetary gear
ActiveCN100580275CNo imbalanceMechanical actuated clutchesGear lubrication/coolingDrive shaftEngineering
The invention relates to a planetary gear, especially for machine tools, comprising a drive shaft which is connected to a sun wheel, a driven shaft which is connected to a planetary gear, and a hollow wheel which is connected to the housing in a first shift position, and to the sun wheel in a second shift position, also comprising a hub which surrounds the drive shaft in a concentric manner, and a sliding sleeve which also surrounds the hub in a concentric manner and is in contact with the hub when in a shift position. The sliding sleeve (5) has a centering diameter which is arranged in a concentric manner on the hub (6) on the end thereof oriented away from the hollow wheel (4). Said centering diameter overlaps with a centering band (8) which is embodied in a concentric manner on the axis of the hub when the sliding sleeve (5) comprising the hub (6) is in an engaged position.
Owner:ZF FRIEDRICHSHAFEN AG
Three-phase diode clamping three-level double-sampling single immediate refreshing method
PendingCN114649966AThere will be no voltage imbalance problemsNo imbalanceAc-dc conversionSingle network parallel feeding arrangementsCapacitanceElectrolysis
The invention discloses a three-phase diode clamping three-level double-sampling single immediate refreshing method which is applied to a voltage quality adjusting device with a three-phase diode clamping three-level topological structure. The three-phase diode clamping three-level topological structure comprises an incoming and outgoing line circuit breaker, a three-phase full-control inverter / rectifier bridge, a direct current side electrolytic filter capacitor, a rectification side LCL filter circuit, an inversion side LCL filter circuit, a coupling series transformer and an inversion side electronic and mechanical bypass part, the controller DSP generates a modulation wave through operation, generates a pulse width modulation signal after PWM modulation, and outputs the pulse width modulation signal to the inverter side. The pulse width modulation signal is converted through the hardware driving circuit to control the on-off state of the three-phase rectifier / inverter. According to the method, the amplitude of the modulation wave can be updated before the modulation wave and the carrier wave intersect in a switching period, the modulation wave updating delay is eliminated, the robustness of a control system is improved, and the steady-state and dynamic performance of grid-connected current is improved.
Owner:SUZHOU AIKE BORUI POWER SUPPLY TECH
Soil testing and fertilization methods for big cherry in the open field
An outdoor large-cherry soil test fertilizer application method comprises a step of soil nutrient detection, a step of fertilizer preparation amount calculation, and a step of fertilizer application, so the method reaches scientific and reasonable fertilizer application, and realizes the adjustment of measures according to local conditions, thereby the method has the advantages of no soil nutrient loss, imbalance, surface source pollution or soil acidification, proper fertilizer application, fruit quality improvement, no pollution, and no physiological diseases, and is especially suitable for the large-cherry fertilizer application.
Owner:招远市农业技术推广中心
Method for improving luminous intensity and thermal stability of nitride red fluorescent powder
ActiveCN112680225AHigh puritySimple processEnergy efficient lightingLuminescent compositionsLuminous intensityHexagonal boron nitride
The invention relates to a method for improving the luminous intensity and thermal stability of nitride red fluorescent powder, in particular to a method for improving luminous intensity and thermal stability of nitride red fluorescent powder CaAlSiN3: Eu < 2 + > by using hexagonal boron nitride (hBN) as a boron source dopant. The method comprises: on the basis of taking EuN, Ca3N2, AlN and Si3N4 as raw material powder, adding a certain proportion of h-BN ultrafine powder into a glove box, weighing, grinding, charging into a graphite mold and the like, putting the graphite mold filled with the mixed raw material powder into a plasma field sintering assisting device, sintering at 1400-1450 DEG C under the condition that the cavity pressure is less than 50Pa, controlling the reaction heating rate to be 180-200 DEG C / min and the heat preservation time to be 3-5 minutes, and after sintering, taking out a block and grinding the block to obtain the Ca0.99 (Al1-xBx) SiN3: 0.01 Eu < 2 + > boron-doped nitride red fluorescent powder with high luminous intensity and high thermal stability. The preparation method is simple in process and high in repeatability, the luminous intensity of the prepared product is improved by 30%-40% compared with that of boron-free powder, and the thermal stability is obviously improved.
Owner:WUHAN UNIV OF TECH
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