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Time domain dynamic characteristic analysis-based intra-vehicle sound quality prediction method
InactiveCN105021275AFeature reservedReduce boundary effectsSubsonic/sonic/ultrasonic wave measurementTime domainAnalysis study
The invention belongs to the technical field of sound quality prediction in vehicle vibration and noise analysis and control and relates to a time domain dynamic characteristic analysis-based intra-vehicle sound quality prediction method. With the method adopted, the problem of incapability of current intra-vehicle sound quality analysis researches to describe the time domain dynamic characteristics of intra-vehicle sound environment in vehicle regular driving can be solved. The method includes the following steps that: 1, a sound acquisition device is utilized to acquire an intra-vehicle sound signal sample; 2, framing and windowing processing is performed on the intra-vehicle sound signal sample; 3, a subjective evaluation test is performed on the intra-vehicle sound signal sample; 4, sound quality objective psychological acoustic parameters are calculated; 5, the time domain dynamic characteristic indexes of the objective psychological acoustic parameters are calculated, wherein the indexes include the variances of the objective psychological acoustic parameters and the ranges of the objective psychological acoustic parameters; 6, an intra-vehicle sound quality objective comprehensive evaluation model is established; 7, the output value of the sound quality objective comprehensive evaluation model is compared with a subjective evaluation value; and 8, a test sample is utilized to verify the model.
Owner:JILIN UNIV
Fullerene amino-acid-ester self-assembled medicine-carrying slow-release vesicle material, and preparation method and application thereof
ActiveCN106083626AFeature reservedSolve hydrophobicityOrganic compound preparationInorganic non-active ingredientsChromatographic separationChlorobenzene
The invention discloses a fullerene amino-acid-ester self-assembled medicine-carrying slow-release vesicle material, and a preparation method and application thereof, and relates to the field of fullerene. The vesicle material is prepared by enabling fullerene molecule to be connected with an amino-acid ester molecule through nucleophilic substitution, wherein fullerene is C60 fullerene and the molecular general formula is C60R5Cl. The preparation method comprises taking C60 fullerene and ICl as raw materials, taking chlorobenzene as a solvent, and synthesizing C60Cl6; adding an amino acid into a hydrochloric acid methanol saturated solution, and performing heating reflux to obtain the amino-acid ester; performing heating reflux on C60Cl6 and the amino-acid ester in a mixed solvent of ethyl acetate and toluene, so as to obtain the fullerene amino-acid-ester cruder product; and performing chromatographic separation, so as to obtain the fullerene amino-acid-ester self-assembled medicine-carrying slow-release vesicle material.
Owner:XIAMEN UNIV +1
Conductive cotton fiber, method for pretreating same and method for preparing conductive cotton fiber
ActiveCN109554918AImprove bindingThe preprocessing method is simple and easy to controlGrip property fibresAbrasion resistant fibresPretreatment methodHydrogen
The invention relates to the technical field of metallization functional textile products, in particular to a conductive cotton fiber, a method for pretreating the same and a method for preparing theconductive cotton fiber. The method for pretreating the conductive cotton fiber includes a step of adsorbing modifiers onto cotton fibers to obtain modified cotton fibers. The modifiers are selected from plant polyphenol. The conductive cotton fiber and the methods have the advantages that the green and environment-friendly modifiers are used by the method for pretreating the conductive cotton fiber and can be adsorbed to the surfaces of the cotton fibers under the effects of hydrogen bonds, a supermolecular structure membrane layer can be formed and can be used as an interface layer between metal plating and the cotton fibers, accordingly, binding force of the metal plating and the cotton fibers can be increased, the performance of the cotton fibers can be prevented from being optionallydestructed, and the shortcomings of fiber damage on existing cotton fibers, fiber performance deterioration and environmental pollution due to the traditional methods for pretreating existing conductive cotton fibers can be overcome; the method for pretreating the conductive cotton fiber is simple, green and environmentally friendly and is easy to control.
Owner:GUANGDONG UNIV OF TECH
Modeling method based on multi-scale decomposition of wind power fluctuation
ActiveCN109038675AFeature reservedFeature retentionSingle network parallel feeding arrangementsWind energy generationDecompositionHigh frequency
The invention provides a modeling method based on wind power fluctuation multi-scale decomposition, comprising: according to the first wind power historical data collected in advance, analyzing the time characteristic and statistical characteristic of wind power fluctuation, so as to determine the wind power fluctuation decomposition component and the time scale corresponding to the wind power fluctuation decomposition component; According to the wind power fluctuation decomposition component and its corresponding time scale, a two-stage WMMF filter is used to decompose the wind power multi-scale fluctuation of the first wind power historical data to obtain a low-frequency trend component, an intermediate-frequency fluctuation component and a high-frequency fluctuation component. Accordingto the low frequency trend component, the intermediate frequency fluctuation component and the high frequency fluctuation component, a multi-dimensional probability model is established. Through theabove method, the multi-dimensional probability model can be established according to the fluctuation characteristics and correlation of wind power fluctuation of the original wind power time series,thus retaining the characteristics of the complete wind power fluctuation process and simulating the wind power output characteristics to the maximum extent.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Vehicle-mounted unit power adaptive adjusting method and equipment
ActiveCN108711197AFeature reservedImprove the marking success rateTicket-issuing apparatusComputer scienceElectronic toll collection
The invention provides a vehicle-mounted unit OBU power adaptive adjusting method and equipment. The method comprises the steps that the power of the OBU is set as the first parameter in front of theentrance of electronic toll collection ETC so as to perform communication with an ETC antenna and complete the entrance transaction process; and the power of the OBU is set as the second parameter after passing the ETC entrance before sleep of the OBU so as to perform communication with a path identification antenna. According to the technical scheme, the functional characteristics of the CPC cardand the conventional OBU can be greatly integrated, the convenient and rapid characteristics at the toll road entrance and exit can be reserved for the OBU vehicle owner, and the marking success rateon the path identification road can also be enhanced. Compared with other schemes, the cost is low and accurate recording of the entrance and exit and path information of the toll road can be completed without performing upgrading and reconstruction of the OBU, the antenna and even the whole system.
Owner:WATCHDATA SYST
Core-spun yarn and processing method thereof
The invention provides core-spun yarn and a processing method thereof, and belongs to the technical field of textiles. The core-spun yarn comprises a yarn core and wrapping yarn. The core-spun yarn ischaracterized in that the yarn core is composed of first fiber, second fiber and third fiber, wherein the weight ratio of the first fiber to the second fiber to the third fiber is 35:20:45; the wrapping yarn comprises first outer covering yarn and second outer covering yarn, and the first outer covering yarn and the second outer covering yarn are used for winding and wrapping the yarn core in opposite directions; the winding number ratio of the first outer covering yarn to the second outer covering yarn is 1:2. The stability of the yarn core is enhanced, deformation, caused by long-time use,of the yarn core can be avoided, and the wearing comfort of people is enhanced.
Owner:浙江荣鑫纤维股份有限公司
Blue light-blocking acrylic adhesive and film prepared from blue light-blocking acrylic adhesive
InactiveCN105086885ASimple structureEasy to manufactureNon-macromolecular adhesive additivesFilm/foil adhesivesSolvent freeDisplay device
The invention relates to a blue light-blocking acrylic adhesive, which is characterized in that a certain amount of a filtering blue light dye is added in an acrylic adhesive to filter blue light having a certain wavelength, wherein the acrylic adhesive is one or more of a water solvable pressure-sensitive adhesive, an emulsion type pressure sensitive adhesive, a solvent pressure sensitive adhesive and a non-solvent pressure sensitive adhesive. The blue light-blocking acrylic adhesive and the film prepared from the blue light-blocking acrylic adhesive have the following beneficial effects that 1) structure is simple, and production is easy; and 2) high-energy shortwave blue-light can be effectively blocked. By changing the optical characteristics of the acrylic adhesive, the characteristics of the acrylic adhesive can be kept, and effective blocking of high-strength blue light which is harm to eyes can be realized. The film can be used for bonding module components of a liquid crystal display, and also can be used for producing various protection films, explosion-proof membranes, non-substrate optical cement (OCA), liquid crystal displays, and products relative to LED light sources.
Owner:TAIHU JINZHANG TECH CO LTD
Light emitting device
InactiveCN1501520AImprove cooling effectFeature reservedPoint-like light sourceSemiconductor/solid-state device detailsLight emitting deviceLight-emitting diode
A light emitting device has a plurality of conductive members with good heat conductivity provided in a base member, the conductive members are isolated by insulating members provided between the conductive members. A light emitting element device is mounted on the base member. An light emitting diode is provided in the light emitting device and mounted on conductive member. A projection is outwardly projected from the heat conductive member for cooling the LED.
Owner:CITIZEN ELECTRONICS CO LTD
Resource recommendation processing method and device
InactiveCN110457596AResolve accuracySolve the real problemDigital data information retrievalSpecial data processing applicationsPersonalizationData mining
The invention provides a resource recommendation processing method and device. The resource recommendation processing method comprises the steps: receiving a target entity for obtaining a resource, and obtaining the description information of the target entity; obtaining classification information of the target entity, the classification information including one or more pieces of category information of the target entity, and each piece of category information including a plurality of associated entities; determining a target entity vector of the target entity according to the target entity,the description information of the target entity and the classification information; matching a corresponding target resource according to the target entity vector; and recommending and displaying thetarget resource, so that the problem of inaccurate and comprehensive recommendation content caused by neglecting a recommendation algorithm of entity characteristics due to excessive attention to user information in related technologies can be solved, and the entity information is introduced while the user characteristics are reserved, thereby better performing personalized recommendation for theuser.
Owner:BEIJING MININGLAMP SOFTWARE SYST CO LTD
Pretreatment method of conductive polyester fibers, conductive polyester fibers and preparation method thereof
InactiveCN109537275AImprove bindingThe pretreatment method is green and environmentally friendlyGrip property fibresAbrasion resistant fibresMetal coatingPolyester
The invention relates to the technical field of metallic functional woven products, and particularly relates to a pretreatment method of conductive polyester fibers, the conductive polyester fibers and a preparation method thereof. The pretreatment method of the conductive polyester fibers comprises the following step: adsorbing a modifying agent on the polyester fibers to obtain modified polyester fibers, wherein the modifying agent is selected from plant polyphenol. According to the pretreatment method, the modifying agent is green and environmentally-friendly, the modifying agent is adsorbed to the surfaces of the polyester fibers through mutual static effect and hydrogen bond effect to form a supermolecule structural film layer which can be used as an interface layer between a metal coating and the polyester fibers, so that the bonding capacity between the metal coating and the polyester fibers can be improved, and no damage is caused to the performance of the polyester fibers; thedefects that the polyester fibers are damaged, and the performance of the fibers are destroyed, and the environmental pollution is caused in a traditional pretreatment method can be overcome. The pretreatment method is simple, easy to control, green and environmentally-friendly.
Owner:GUANGDONG UNIV OF TECH
Integrated design method and system of hypersonic flight vehicle body and inward rotating type air inlet duct
ActiveCN110450963AIncrease air intakeReduce the interference of radio systemGround installationsPower plant air intake arrangementsLeading edgeShock wave
The invention discloses an integrated design method, configuration and system of a hypersonic flight vehicle. According to the design method, an inward rotating type axial symmetry standard flow fieldand an outer compressing standard flow field are firstly generated, an inward rotating type shock wave and an outer compressing shock wave are generated under the design condition, and the two shockwaves intersect to form a shock wave intersecting line; and then a bottom projective plane perpendicular to the rotation axis of the standard flow field is arranged, a projection line of the shock wave intersecting line is generated on the projective plane, a projection line of a wave rider leading edge line is designed, and then a wave riding face, a free flow face, an inward rotating type air inlet duct and an air inlet duct outer fairing are generated. The internal flow and external flow integrated configuration of the hypersonic flight vehicle is formed by the generated inward rotating type air inlet duct, air inlet duct outer fairing, wave riding face and free flow face. According to the designed internal flow and external flow integrated configuration of the hypersonic flight vehicle, the excellent performance of the inward rotating type air inlet duct and the high lift-drag ratio property of a wave rider are basically kept, and complex wave system interference between an enginebody and the air inlet duct is weakened from the perspective of flow field coupling.
Owner:NAT UNIV OF DEFENSE TECH
Blue light-blocking organosilicone adhesive and film prepared by blue light-blocking organosilicone adhesive
ActiveCN105086861ASimple structureEasy to manufactureNon-macromolecular adhesive additivesFilm/foil adhesivesDisplay deviceMaterials science
The invention relates to a blue light-blocking organosilicone adhesive and a film prepared by the blue light-blocking organosilicone adhesive, wherein the organosilicone adhesive is characterized in that a certain amount of filter blue dye is added in the organosilicone adhesive, a certain wavelength of blue light is filtrated. The organosilicone adhesive is an organosilicone pressure sensitive adhesive or an organosilicone rubber. The blue light-blocking organosilicone adhesive and a film prepared by the blue light-blocking organosilicone adhesive have the following beneficial effects that 1)structure is simple, production is easy; and 2)high-energy shortwave blue-light can be effectively blocked. By changing the optical characteristics of the organosilicone adhesive, the characteristics of the organosilicone adhesive can be kept, and effective blocking of high-strength blue light which is harm to eyes can be realized. The film can be used for bonding module components of a liquid crystal display, and also can be used for producing various protection films, explosion-proof membranes, non-substrate optical cement (OCA), LED displays, and products relative to LED light sources.
Owner:TAIHU JINZHANG TECH CO LTD
Rock mass structural plane intelligent interpretation method based on point cloud and GPU technologies
ActiveCN112508766ACalculation speedSimple calculationUsing optical meansProcessor architectures/configurationComputational sciencePoint cloud
The invention discloses a rock mass structural plane intelligent interpretation method based on point cloud and GPU technologies. Collected rock mass laser point cloud data are processed as follows: step one, normal vectors of all points in the point cloud data being calculated based on GPU parallel computing and a linear regression method; 2, identifying a structural plane feature point set by using an improved region growing method; 3, extracting a structural plane boundary from the final structural plane feature point set by utilizing an improved convex hull scanning method; and 4, calculating the trace length, occurrence and spacing of the automatic interpretation structural plane based on the contour points. According to the method, the top-speed operation of massive point cloud datacan be realized, the efficiency bottleneck of identifying the structural plane based on the point cloud in the past is broken through, the rock mass structural plane information is accurately, quicklyand efficiently acquired, and meanwhile, the boundary of the structural plane can be described with high precision, so that the accurate trace length of the structural plane is calculated.
Owner:HUBEI UNIV OF TECH +2
LLC circuit of single-stage PFC
ActiveCN111740622ASmall rippleWork status is not affectedEfficient power electronics conversionAc-dc conversionCapacitanceConverters
The invention relates to an LLC circuit of a single-stage PFC. An input rectifier forms a loop for charging a capacitor in a Boost converter; the Boost converter further comprises a first inductor, afirst switching element and a second switching element; and the isolated DC-DC converter comprises a bridge arm structure, a resonant inductor, a resonant capacitor, a transformer and a rectificationfilter circuit. One end of the first inductor is connected with the first output end of the input rectifier, the other end of the first inductor is connected with a center tap of the primary winding,and the connection point is connected with the midpoint of the bridge arm structure through a branch comprising part of the primary winding, the resonant inductor and the resonant capacitor; or the other end of the first inductor is connected with one end of the primary winding, the connection point is connected with the midpoint of the bridge arm structure through a branch comprising the resonantinductor and the resonant capacitor, and the other end of the primary winding is connected with the first output end of the input rectifier. According to the invention, the LLC working state of the circuit is not affected, the bandwidth of the output voltage loop can be designed to be high, and the power frequency ripple of the secondary output voltage is small.
Owner:奇普电源(常州)有限公司
A method for preparing nano-silicon based on halloysite raw material
ActiveCN105905908BLow costFeature reservedMaterial nanotechnologySilicon compoundsHalloysiteMicro structure
The invention discloses a method of preparing nano silicon on the basis of a halloysite raw material. The method includes the steps of: with halloysite clay as a raw material, acid-pickling the halloysite clay to obtain nano silicon dioxide, and mixing the nano silicon dioxide as a precursor with magnesium powder, and performing magnesiothermic reduction to prepare nano silicon particles having regular morphology with reaction conditions controlled. The halloysite has a nano tubular structure, so that an acid solution is easy to permeate the halloysite, thereby accelerating the acid pickling reaction. The magnesiothermic reduction process has low temperature, so that the micro-structure of a reaction product can be maintained. The nano silicon particle has uniform appearance and morphology, uniform pore diameter distribution, high specific surface are and low production cost. The method, with the natural halloysite clay as the raw material, is low in cost, is easy to amplified in production and has a wide application prospect in the fields such as lithium ion battery materials.
Owner:湖南宸宇富基新能源科技有限公司
Conductive aramid fiber, method for pretreating same and method for preparing conductive aramid fiber
ActiveCN109554917ALow costImprove bindingGrip property fibresAbrasion resistant fibresPretreatment methodPolyphenol
The invention relates to the technical field of metallization functional textile products, in particular to a conductive aramid fiber, a method for pretreating the same and a method for preparing theconductive aramid fiber. The method for pretreating the conductive aramid fiber includes a step of adsorbing modifiers onto aramid fibers to obtain modified aramid fibers. The modifiers are selected from plant polyphenol. The conductive aramid fiber and the methods have the advantages that the green and environment-friendly modifiers are used by the method for pretreating the conductive aramid fiber and are attached to the surfaces of the aramid fibers under electrostatic interaction and the effects of hydrogen bonds, a supermolecular structure membrane layer can be formed and can be used as an interface layer between metal plating and the aramid fibers, accordingly, binding force of the metal plating and the aramid fibers can be increased, the performance of the aramid fibers can be prevented from being optionally destructed, and the shortcomings of fiber damage on existing aramid fibers, fiber performance deterioration and environmental pollution due to the traditional methods for pretreating existing conductive aramid fibers can be overcome; the method for pretreating the conductive aramid fiber is simple, green and environmentally friendly and is easy to control.
Owner:GUANGDONG UNIV OF TECH
Fullerene/gutta-percha ultraviolet absorption film material and preparation method and application thereof
ActiveCN112143048AGood biodegradable propertiesGood prevention and control effectPlant protective coveringsUv absorbancePolymer science
The invention provides a fullerene / gutta-percha ultraviolet absorption film material and a preparation method and application thereof, and belongs to the technical field of composite materials. The fullerene / gutta-percha ultraviolet absorption film material provided by the invention comprises a film matrix and fullerene dispersed in the film matrix, wherein the film matrix is formed by gutta-percha, and the fullerene is C60. The film material provided by the invention is obtained by compounding fullerene C60 and gutta-percha, wherein the fullerene C60 has good ultraviolet absorption capacity,and the gutta-percha has good biodegradability and is environment-friendly, so that the film material obtained by compounding the fullerene C60 and the gutta-percha retains respective characteristics,is good in biodegradability and has a wide ultraviolet absorption band, the ultraviolet absorptivity in the wave band of 200-400 nm almost reaches 100%, and a good prevention and control effect on the gibberella saubinetii is achieved.
Owner:NORTHWEST A & F UNIV
A kind of conductive aramid fiber pretreatment method, conductive aramid fiber and preparation method thereof
ActiveCN109554917BLow costImprove bindingGrip property fibresAbrasion resistant fibresMetal coatingElectrostatic interaction
The invention relates to the technical field of metallized functional textiles, in particular to a pretreatment method for conductive aramid fiber, conductive aramid fiber and a preparation method thereof. The invention discloses a pretreatment method of conductive aramid fiber, which comprises the following steps: a modifier is adsorbed on the aramid fiber to obtain a modified aramid fiber; the modifier is selected from plant polyphenols. The pretreatment method uses a green and environmentally friendly modifier, which is adsorbed on the surface of the aramid fiber through electrostatic interaction and hydrogen bonding to form a layer of supramolecular structure, which can be used as a bond between the metal coating and the aramid fiber. The interface layer can improve the bonding force between the metal plating layer and the aramid fiber, and will not cause any damage to the performance of the aramid fiber. Disadvantages of environmental pollution. The pretreatment method is simple, easy to control, and environmentally friendly.
Owner:GUANGDONG UNIV OF TECH
An intelligent interpretation method of rock mass structural plane based on point cloud and GPU technology
ActiveCN112508766BCalculation speedSimple calculationUsing optical meansProcessor architectures/configurationComputational sciencePoint cloud
The invention discloses an intelligent interpretation method of rock mass structural plane based on point cloud and GPU technology, and the collected rock mass laser point cloud data is processed as follows: the first step is to calculate the point cloud based on GPU parallel computing and linear regression method The normal vector of each point in the data; the second step, using the improved region growing method to identify the structural surface feature point set; the third step, using the improved convex hull scanning method to extract the structural surface boundary from the final structural surface feature point set; Four steps, automatically interpret the trace length, occurrence and spacing of the structural surface based on the contour point calculation. The method of the present invention can realize the extremely fast calculation of massive point cloud data, break through the efficiency bottleneck of identifying structural planes based on point clouds in the past, accurately, quickly and efficiently obtain rock mass structural plane information, and at the same time can perform high-precision delineation of structural plane boundaries, and then Calculate the exact trace length of the structural plane.
Owner:HUBEI UNIV OF TECH +2
Cow vamp leather pretreatment method based on season change and application thereof
PendingCN114214470AGuaranteed removalReduce usageTanning treatmentPre-tanning chemical treatmentHorticultureCollagen fibres
The invention discloses a cattle instep leather pretreatment method based on season change and application thereof, and the cattle instep leather pretreatment method comprises the following steps: step (1), based on the weight of wet blue leather, adding 100-120% of water, controlling the temperature at 18-22 DEG C, adding 0.3-0.5% of softening enzyme, 0.5-1.0% of soaking agent and 0.8-1.2% of emulsifier, rotating, then adding 0.1-0.3% of protease and 0.5-1.0% of degreaser, and draining; (2) according to the weight of the wet blue leather, 120-180% of water is added, the temperature is controlled to be 30-35 DEG C, 0.3-0.5% of fatty alcohol and 5-8% of a composite rewetting agent are added, then 1-2% of the composite rewetting agent and 0.5-1% of a degreasing agent are supplemented, and drainage is conducted; (3) according to the weight of the wet blue leather, adding 50-100% of water, controlling the temperature to be 45-50 DEG C, firstly adding 0.5-1% of an emulsifier, 1-2% of a synthetic fatliquor and 1-3% of sulfonated oil, and draining water; according to the method, the technical effects that interfibrous substances and natural grease (beef tallow) among the leather collagen fibers are removed, meanwhile, the leather collagen fibers are relieved, and the leather collagen fibers are recovered to the original length as much as possible are achieved.
Owner:XINGYE LEATHER TECH CO LTD
A class of fullerene amino acid ester self-assembled drug-loaded sustained-release vesicle material and its preparation method and application
ActiveCN106083626BFeature reservedSolve hydrophobicityOrganic compound preparationInorganic non-active ingredientsChromatographic separationChlorobenzene
The invention discloses a fullerene amino-acid-ester self-assembled medicine-carrying slow-release vesicle material, and a preparation method and application thereof, and relates to the field of fullerene. The vesicle material is prepared by enabling fullerene molecule to be connected with an amino-acid ester molecule through nucleophilic substitution, wherein fullerene is C60 fullerene and the molecular general formula is C60R5Cl. The preparation method comprises taking C60 fullerene and ICl as raw materials, taking chlorobenzene as a solvent, and synthesizing C60Cl6; adding an amino acid into a hydrochloric acid methanol saturated solution, and performing heating reflux to obtain the amino-acid ester; performing heating reflux on C60Cl6 and the amino-acid ester in a mixed solvent of ethyl acetate and toluene, so as to obtain the fullerene amino-acid-ester cruder product; and performing chromatographic separation, so as to obtain the fullerene amino-acid-ester self-assembled medicine-carrying slow-release vesicle material.
Owner:XIAMEN UNIV +1
A kind of antibacterial and insect-proof heat-generating composite yarn and preparation method thereof
ActiveCN113106589BGood warmth retentionGood hygroscopicityFilament/thread formingContinuous wound-up machinesYarnPolymer science
Owner:SUZHOU UNIV
Method and system for integrated design of hypersonic aircraft body and inward turning inlet
ActiveCN110450963BIncrease air intakeReduce the interference of radio systemGround installationsPower plant air intake arrangementsShock waveLeading edge
The invention discloses an integrated design method, configuration and system of a hypersonic flight vehicle. According to the design method, an inward rotating type axial symmetry standard flow fieldand an outer compressing standard flow field are firstly generated, an inward rotating type shock wave and an outer compressing shock wave are generated under the design condition, and the two shockwaves intersect to form a shock wave intersecting line; and then a bottom projective plane perpendicular to the rotation axis of the standard flow field is arranged, a projection line of the shock wave intersecting line is generated on the projective plane, a projection line of a wave rider leading edge line is designed, and then a wave riding face, a free flow face, an inward rotating type air inlet duct and an air inlet duct outer fairing are generated. The internal flow and external flow integrated configuration of the hypersonic flight vehicle is formed by the generated inward rotating type air inlet duct, air inlet duct outer fairing, wave riding face and free flow face. According to the designed internal flow and external flow integrated configuration of the hypersonic flight vehicle, the excellent performance of the inward rotating type air inlet duct and the high lift-drag ratio property of a wave rider are basically kept, and complex wave system interference between an enginebody and the air inlet duct is weakened from the perspective of flow field coupling.
Owner:NAT UNIV OF DEFENSE TECH
A single stage pfc llc circuit
ActiveCN111740622BSmall rippleWork status is not affectedEfficient power electronics conversionAc-dc conversionCapacitanceConverters
Owner:奇普电源(常州)有限公司
Power load fluctuation range prediction method and device
PendingCN111047074ATaking into account chaosTaking into account uncertaintyForecastingComputational physicsControl theory
The invention relates to a power load fluctuation range prediction method and device. The method comprises: obtaining a fuzzy matrix corresponding to a historical power load time sequence at a currentmoment and before the current moment; performing phase space reconstruction on each row of fuzzy data in the fuzzy matrix to obtain a phase space matrix corresponding to each row of fuzzy data; and determining a power load fluctuation range in a future time period after the current moment according to the phase space matrix corresponding to each row of fuzzy data. A phase space matrix corresponding to a historical power load time sequence is obtained; the load fluctuation range of the prediction moment is obtained by using the phase space matrix, the chaos and uncertainty of the power load time sequence are considered, the prediction result is more accurate than the result obtained in the prior art, and a powerful support can be provided for the formulation of a subsequent power distribution plan.
Owner:CHINA ELECTRIC POWER RES INST +2
A hybrid routing method in multi-radio multi-channel wireless mesh network
ActiveCN106162788BFaster local convergenceAvoid local optimaWireless communicationQuality of serviceWireless mesh network
The invention discloses a hybrid routing method for a multi-radio-frequency multi-channel wireless Mesh network. The method is implemented through the scheme that a particle swarm in the multi-radio-frequency multi-channel wireless Mesh network is divided into two parts, the routes of one part are updated through a particle swarm optimizing method, interlace operation is conducted on the routes of the other part, and the optimal route is sought by combining the two methods. According to the method, the selecting problem of the optimal route in the multi-radio-frequency multi-channel wireless Mesh network constrained by service quality is solved, stability between knowledge sharing and natural selecting is improved, and the optimal route is more easily found in a searching space.
Owner:陕西尚品信息科技有限公司
A kind of blocking blue light organosilica gel and the film made thereof
ActiveCN105086861BSimple structureEasy to manufactureNon-macromolecular adhesive additivesPressure sensitive film/foil adhesivesDisplay deviceSilica gel
The invention provides a blue-light-blocking organic silica gel and a film made thereof. When the organic silica gel is produced, a certain amount of blue-light-filtering dye is added to the organic silica gel water to filter blue light of a certain wavelength. Silicone water is silicone pressure sensitive adhesive or silicone rubber. The beneficial effects of the present invention are: (1) simple structure and easy manufacture; (2) can effectively block high-energy short-wave blue light. By improving the optical properties of silicone, it not only retains the properties of silicone water itself, but also effectively blocks high-intensity blue light that is harmful to the eyes. The film can be used for the bonding of various modules of liquid crystal displays, and can also be used in the production of various protective films, explosion-proof films, substrate-free optical adhesives (OCA), LED displays, and LED light sources.
Owner:TAIHU JINZHANG TECH CO LTD
Hybrid routing method for multi-radio-frequency multi-channel wireless Mesh network
ActiveCN106162788AFaster local convergenceAvoid local optimaWireless communicationQuality of serviceWireless mesh network
The invention discloses a hybrid routing method for a multi-radio-frequency multi-channel wireless Mesh network. The method is implemented through the scheme that a particle swarm in the multi-radio-frequency multi-channel wireless Mesh network is divided into two parts, the routes of one part are updated through a particle swarm optimizing method, interlace operation is conducted on the routes of the other part, and the optimal route is sought by combining the two methods. According to the method, the selecting problem of the optimal route in the multi-radio-frequency multi-channel wireless Mesh network constrained by service quality is solved, stability between knowledge sharing and natural selecting is improved, and the optimal route is more easily found in a searching space.
Owner:陕西尚品信息科技有限公司
A kind of pretreatment method of conductive cotton fiber, conductive cotton fiber and preparation method thereof
ActiveCN109554918BImprove bindingThe preprocessing method is simple and easy to controlGrip property fibresAbrasion resistant fibresMetal coatingPretreatment method
The invention relates to the technical field of metallized functional textiles, in particular to a pretreatment method for conductive cotton fibers, conductive cotton fibers and a preparation method thereof. The invention discloses a pretreatment method for conductive cotton fibers, which comprises the following steps: adsorbing a modifying agent on the cotton fibers to obtain modified cotton fibers; the modifying agent is selected from plant polyphenols. This pretreatment method uses a green and environmentally friendly modifier, which can be adsorbed on the surface of cotton fibers through hydrogen bonding to form a layer of supramolecular structure film, which can be used as an interface layer between the metal coating and cotton fibers, which can improve The combination of the metal coating and the cotton fiber will not cause any damage to the properties of the cotton fiber, which overcomes the shortcomings of the traditional pretreatment method that will cause fiber damage to the cotton fiber, resulting in deterioration of fiber performance and environmental pollution. The pretreatment method is simple, easy to control, and environmentally friendly.
Owner:GUANGDONG UNIV OF TECH
Modeling method based on multi-scale decomposition of wind power fluctuation
ActiveCN109038675BFeature reservedFeature retentionSingle network parallel feeding arrangementsWind energy generationIntermediate frequencyAtmospheric sciences
The invention provides a modeling method based on wind power fluctuation multi-scale decomposition, comprising: according to the first wind power historical data collected in advance, analyzing the time characteristic and statistical characteristic of wind power fluctuation, so as to determine the wind power fluctuation decomposition component and the time scale corresponding to the wind power fluctuation decomposition component; According to the wind power fluctuation decomposition component and its corresponding time scale, a two-stage WMMF filter is used to decompose the wind power multi-scale fluctuation of the first wind power historical data to obtain a low-frequency trend component, an intermediate-frequency fluctuation component and a high-frequency fluctuation component. Accordingto the low frequency trend component, the intermediate frequency fluctuation component and the high frequency fluctuation component, a multi-dimensional probability model is established. Through theabove method, the multi-dimensional probability model can be established according to the fluctuation characteristics and correlation of wind power fluctuation of the original wind power time series,thus retaining the characteristics of the complete wind power fluctuation process and simulating the wind power output characteristics to the maximum extent.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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