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42results about How to "Strong resonance" patented technology
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Multistage Force Amplification of Piezoelectric Stacks
ActiveUS20120119620A1Constant efficiencyReduce input stiffnessPiezoelectric/electrostriction/magnetostriction machinesPiezoelectric/electrostrictive/magnetostrictive devicesEnergy basedEngineering
Embodiments of the disclosure include an apparatus and methods for using a piezoelectric device, that includes an outer flextensional casing, a first cell and a last cell serially coupled to each other and coupled to the outer flextensional casing such that each cell having a flextensional cell structure and each cell receives an input force and provides an output force that is amplified based on the input force. The apparatus further includes a piezoelectric stack coupled to each cell such that the piezoelectric stack of each cell provides piezoelectric energy based on the output force for each cell. Further, the last cell receives an input force that is the output force from the first cell and the last cell provides an output apparatus force In addition, the piezoelectric energy harvested is based on the output apparatus force. Moreover, the apparatus provides displacement based on the output apparatus force.
Owner:NASA
Antenna component
ActiveCN1993860AGood omnidirectional radiationIncrease field strengthAntenna supports/mountingsRadiating elements structural formsElectromagnetic couplingElectrical conductor
The invention relates to an antenna in which the radiators are conductor coatings of a dielectric substrate chip (210). There are two radiators (220, 230), and they are of the same size and symmetrical so that each covers one of the opposite heads of a rectangular substrate chip and part of the upper surface. In the middle of the upper surface between the elements there remains a slot (260), over which the elements have an electromagnetic coupling with each other. The chip component (201) is mounted on a circuit board (PCB), the conductor pattern of which is part of the whole antenna structure. There is no ground plane (GND) under the chip or on its sides up to a certain distance (s). The lower edge of one radiator (220) is galvanically coupled to the antenna feed conductor on the circuit board, and at another point to the ground plane, whereas the lower edge of the opposite, parasitic radiator (230) is galvanically coupled only to the ground plane. The parasitic radiator gets its feed through said electromagnetic coupling, and both elements resonate equally strongly at the operating frequency. The antenna is tuned and matched without discrete components by changing the width (d) between the radiating elements and by shaping the conductor pattern of the circuit board near the chip component. The efficiency of the antenna is good in spite of the dielectric substrate, and its omnidirectional radiation is excellent.
Owner:PULSE FINLAND
Multistage force amplification of piezoelectric stacks
ActiveUS9048759B2Constant efficiencyReduce stiffnessPiezoelectric/electrostriction/magnetostriction machinesPiezoelectric/electrostrictive/magnetostrictive devicesElectricityEnergy based
Embodiments of the disclosure include an apparatus and methods for using a piezoelectric device, that includes an outer flextensional casing, a first cell and a last cell serially coupled to each other and coupled to the outer flextensional casing such that each cell having a flextensional cell structure and each cell receives an input force and provides an output force that is amplified based on the input force. The apparatus further includes a piezoelectric stack coupled to each cell such that the piezoelectric stack of each cell provides piezoelectric energy based on the output force for each cell. Further, the last cell receives an input force that is the output force from the first cell and the last cell provides an output apparatus force In addition, the piezoelectric energy harvested is based on the output apparatus force. Moreover, the apparatus provides displacement based on the output apparatus force.
Owner:NASA
Mixer and frequency converting apparatus
ActiveUS20090243698A1Reduce power consumptionReduce manufacturing costModulation transferenceComputations using contact-making devicesFrequency mixerMagnetic layer
A mixer includes: a magnetoresistive effect element including a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer; and a magnetic field applying unit that applies a magnetic field to the free magnetic layer. The mixer is operable, when a first high-frequency signal and a second high-frequency signal as a local signal are inputted, to multiply the first high-frequency signal and the second high-frequency signal using the magnetoresistive effect element and to generate a multiplication signal. A frequency converting apparatus includes the mixer and a filter operable, when a higher frequency and a lower frequency out of frequencies of the first high-frequency signal and the second high-frequency signal are expressed as f1 and f2 respectively, to pass one out of a frequency (f1+f2) and a frequency (f1-f2) out of the multiplication signal.
Owner:TDK CORPARATION
Bragg grating biochemical sensor at interface of fiber core and cladding
ActiveCN105334190AImprove environmental adaptabilitySimple structurePhase-affecting property measurementsThermometers using physical/chemical changesFiberGrating
The invention discloses a Bragg grating biochemical sensor at interface of a fiber core and a cladding and a method. The Bragg grating biochemical sensor at the interface of the fiber core and the cladding comprises the fiber core and the fiber cladding wrapping the fiber core, and is characterized in that the front segment of the fiber core is provided with a long-period fiber grating, the middle segment of the fiber is provided with a Bragg grating at the interface of the fiber core and the cladding; the Bragg grating at the interface of the fiber core and the cladding is composed of a plurality of linear grooves or point-like grooves; the linear grooves or the point-like grooves are periodically distributed along the axial direction of the fiber; and the external surface of the fiber cladding corresponding to the Bragg grating at the interface of the fiber core and the cladding is provided with a silane layer through adsorption. The technical scheme is widely applicable to fields such as biology, chemical engineering, medical science, life science and the like.
Owner:CHONGQING UNIV OF TECH
Porous-alumina-based visible near infrared broadband absorber and preparation method thereof
The invention discloses a porous-alumina-based visible near infrared broadband absorber. The porous-alumina-based visible near infrared broadband absorber includes a substrate, wherein a high-low refractive index medium anti-reflection film system is arranged on the front side of the substrate; a bipass porous alumina template is arranged on the back side of the substrate; and the porous alumina template is covered by a metal thin film. The invention also discloses a preparation method of the above absorber. The porous-alumina-based visible near infrared broadband absorber and the preparation method thereof utilize the porous alumina template and use the layer of thin high absorbability metal structure covered on the porous alumina to realize strong resonance between the medium and the metal on the bottom surface and the side wall of the porous alumina holes so as to realize absorption of visible near infrared wave band broadband. The porous-alumina-based visible near infrared broadband absorber has the advantages of being simple in structure, being simple and convenient in preparation, being low in cost, being convenient for mass and batched production. Therefore, the porous-alumina-based visible near infrared broadband absorber is expected to be widely applied to the fields of elimination of stray light, space detection, imaging, photo-thermal conversion and electromagnetic absorption.
Owner:上海高能煜镀科技有限公司
Mixer and frequency converting apparatus
InactiveUS7991377B2Reduce power consumptionReduce manufacturing costModulation transferenceComputations using contact-making devicesFrequency mixerMagnetic layer
A mixer includes: a magnetoresistive effect element including a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer; and a magnetic field applying unit that applies a magnetic field to the free magnetic layer. The mixer is operable, when a first high-frequency signal and a second high-frequency signal as a local signal are inputted, to multiply the first high-frequency signal and the second high-frequency signal using the magnetoresistive effect element and to generate a multiplication signal. A frequency converting apparatus includes the mixer and a filter operable, when a higher frequency and a lower frequency out of frequencies of the first high-frequency signal and the second high-frequency signal are expressed as f1 and f2 respectively, to pass one out of a frequency (f1+f2) and a frequency (f1−f2) out of the multiplication signal.
Owner:TDK CORPARATION
Cucurbit flute
The invention discloses a cucurbit flute (a musical instrument in China). The cucurbit flute comprises a blowtorch, a cucurbit body and a reed; an alto bent pipe and a high pitch bent pipe are arranged in the cucurbit body; the alto bent pipe serves as an alto resonance cavity, and the high pitch bent pipe serves as a high pitch resonance cavity; the main body of the cucurbit body serves as a lowpitch resonance cavity; air inlets and air outlets of the resonance cavities are correspondingly formed at the upper end and the lower end of the cucurbit body; the blowtorch is arranged on the air inlet at the upper end; the air outlet at the lower end is connected with an alto main pipe, a low pitch main pipe and a high pitch main pipe; and the upper ends of the main pipes are correspondingly provided with an alto pipe reed, a low pitch pipe reed and a high pitch reed. The cucurbit flute pronounces through different main pipes by using three rotary insertion modes of the blowtorch, so that each main pipe of the cucurbit flute can be used for playing independently and the cucurbit flute can give an instrumental performance of the three different ranges; moreover, bright and ringing colorof the high pitch range, mild tune of the alto range and graceful and sincerely tune of the low pitch range can be embodied.
Owner:姚俊
Elasto-optic modulation polarization imaging biosensing system of double-period nanopore chip
PendingCN111239052AStrong resonanceReduce dosagePolarisation-affecting propertiesEngineeringLaser light
The invention belongs to the technical field of biosensing systems, and especially relates to an elasto-optic modulation polarization imaging biosensing system of a double-cycle nanopore chip. A beamexpanding collimation module, a 45-degree polarizer, an elasto-optical modulator, a double-period nanopore biosensor chip, a-45-degree analyzer and a CCD imaging detector are sequentially arranged onone side of the detection laser light source. The CCD imaging detector is connected with the control computer and a elasto-optical modulator driving controller; the control computer is connected withthe elasto-optical modulator driving controller, the detection laser light source is connected with a programmable control pulse generator, the programmable control pulse generator is connected with the elasto-optical modulator driving controller, and the elasto-optical modulator driving controller is connected with the elasto-optical modulator. According to the invention, real-time polarization imaging detection of the double-cycle nanopore array is realized, and in-situ, rapid, real-time, non-labeled, high-precision, high-sensitivity, multi-channel and high-flux sensing measurement of biomolecules is realized. The biosensor is used for biosensing measurement.
Owner:ZHONGBEI UNIV
Dulcimer with balanced timbre
ActiveCN102903352AResonance enhancementStrong penetrating powerStringed musical instrumentsResonatorEngineering
The invention provides a dulcimer with balanced timbre and relates to a dulcimer. The dulcimer with the balanced timbre comprises a dulcimer body, a resonator is arranged in the dulcimer body, the resonator is composed of a face plate, a front plate, a left dulcimer head, a rear plate, a right dulcimer head and a bottom plate, a plurality of sound beams are arranged in the resonator, the face plate is a curved surface protruding upward, the bottom plate is a complete reflection plate, and at least one sound hole is arranged on the face plate. The dulcimer with the balanced timbre has the advantage that the material and the structure of the bottom plate are both improved, the sound holes are arranged on the face plate, resonance of the resonator is improved greatly, and penetrating power is strong; the bottom plate is designed into a curved surface protruding downward, volume of the resonator can be enlarged, sound waves in the resonator are concentrated after being sent, resonance effect is better, and sound volume is increased effectively; frequency spectrum variation of the dulcimer is even along with voice registers from low to high, transition of timbre and listening is natural, no bouncing feeling exists, and the timbre is balanced and consistent.
Owner:汕头市粤升乐器实业有限公司
Silver nanocube-based solution organic light emitting diode and preparation method thereof
ActiveCN109273617AImprove luminous efficiencyGood resonance effectMaterial nanotechnologyNanoinformaticsEvaporationSpins
The invention discloses a solution organic light emitting diode based on a silver nanocube, comprising a sequentially laminated anode, a hole transport layer, a light emitting layer containing silvernanocube, an electron transport layer, and a cathode. The invention also discloses a preparation method of a solution organic light emitting diode based on silver nanocube: firstly, the ITO glass substrate is thoroughly cleaned, then a hole transport layer is spin-coated to prepare the hole transport layer, the hole transport layer comprises a silver nanocube light emitting layer, and then an electron transport layer and a metal electrode are sequentially prepared by evaporation in vacuum. The invention has the advantages that the silver nano cube is dispersed in the light emitting layer, theluminous efficiency of the organic light emitting diode is effectively improved by utilizing the plasma resonance effect of the silver nano cube, the preparation method is simple and easy, and has potential application value.
Owner:NANJING UNIV OF POSTS & TELECOMM
Preparation method of multi-layer metal nanometer structure based on two-dimensional material
ActiveCN110616408AHigh densityReduce gapVacuum evaporation coatingSputtering coatingRepeatabilityParameter control
The invention discloses a preparation method of a multi-layer metal nanometer structure based on a two-dimensional material, and belongs to the field of novel nanometer structure machining. The preparation process of the multi-layer metal nanometer structure mainly comprises the following four steps that (1) an ultra-thin AAO template is transferred to a substrate which is already subjected to hydrophilic treatment; (2) metal is uniformly deposited into a hole of the AAO template according to a sputtering method; (3) the AAO template on the substrate is removed by a tape in a sticking mode, one layer of h-BN is transferred onto the substrate, and then a layer of ultra-thin AAO template is transferred onto the h-BN; and (4) the substrate is placed in sputtering equipment to deposit a layerof metal again, the AAO template is removed, and the third step and the fourth step are repeated to carry out the next-layer nano-particle deposition. The preparation method is simple in process, lowin cost, strong in process repeatability and good in process parameter control. A multi-layer metal nanostructure array with periodicity can be prepared in a large area.
Owner:BEIJING UNIV OF TECH
Kangen resonance instrument prolonging low pitch
InactiveCN102610217AReduce Noise and BuzzBalanced and melodious volumeStringed musical instrumentsViolinEngineering
The invention relates to a kangen resonance instrument prolonging low pitch, which is designed to solve the problems that the existing national low pitch string instrument is slow in audio vibration, smaller in volume and dull in tone, and a western violin is used as a low pitch part instrument, which is not harmonious with style of national music. The rod is designed as a hollow tube to be served as an additional resonance cavity of a main resonance cavity cylinder, the membrane of the instrument is a sound simulating membrane, and strings are at least six metal strings which are pulled by a bow to be uniformly distributed on the tubular rod and strings of the cylinder, so that a main resonance cavity and the additional resonance cavity can generate three-dimensional resonance. The audio is further filtered through loudspeaking openings on the surface of the main resonance cavity and the additional resonance cavity. The kangen resonance instrument prolonging low pitch has the beneficial effects of fundamentally changing the structure of conventional low pitch Huqin and Gehu which use a single resonance cavity by applying modern instrument acoustic theory based on the characteristics of sound resonance of conventional string instruments, thereby highlighting the main cylindrical resonance cylinder and the tubular resonance cavity rod that generate three-dimensional resonance and further filtering the audio of the instrument through the loudspeaking openings on the surface of the main resonance cavity and the additional resonance cavity, so that the noise is effectively eliminated, the tone quality and the tone volume is guaranteed, and the tone is more balanced and melodious.
Owner:SHENYANG NORMAL UNIV
New resonance tube urheen with urheen skin capable of being tensioned freely
InactiveCN101882435ADisadvantages of changing slack that cannot be adjustedGuaranteed parallel pullStringed musical instrumentsResonanceEngineering
The invention discloses a new resonance tube urheen with an urheen skin capable of being tensioned freely, comprising an urheen tube and the urheen skin; an urheen skin tensioning device is arranged inside the urheen tube and comprises a metal sleeve fixed on the urheen skin, a pulling claw installed on the inner wall of the metal sleeve, a screw connected on a metal ring, and a resonator; one end of the resonator is fixed on the pulling claw, the other end is connected on the screw through a front suspender, and the resonator is a steel wire or an elastic steel slip. The new resonance tube urheen with the urheen skin capable of being tensioned freely overcomes the disadvantages generated in the process of producing urheens and the defect that the urheen skin is flabby in future and can not be adjusted; the tightness of the skin of the produced finished urheen can be adjusted according to playing requirements of a user, thus meeting the requirements of tone colors required by playing music with different styles; and meanwhile, the steel wire or the elastic steel slip is taken as the resonator, thereby overcoming the defect of insufficient resonance because the urheen tube of the urheen is too small.
Owner:王春喜
Information sharing method, electronic equipment and storage medium
PendingCN111523071AImprove sharing experienceAchieve the effect of personalized sharingData processing applicationsWebsite content managementPersonalizationEngineering
The embodiment of the invention relates to the field of communication, and discloses an information sharing method, electronic equipment and a storage medium. The information sharing method comprisesthe steps of receiving a sharing request carrying to-be-shared content; in response to the sharing request, obtaining to-be-shared work information of the to-be-shared content; determining target sharing content based on the to-be-shared work information and pre-stored checked work information of a shared user; and generating a target sharing page based on the target sharing content. The target sharing content is determined according to the to-be-shared work information and the checked work information of the shared user, and the target sharing page is generated, so that the personalized sharing effect of information sharing is achieved, and the sharing experience of the user is improved.
Owner:MIGU CO LTD +1
Method for implementing orchestral resonance instrument with bass extension effect
InactiveCN102663997AReduce noiseBalanced and melodious soundMusical instrumentsBreathy voiceAcoustic theory
A method for implementing an orchestral resonance instrument with a bass extension effect is designed for solving problems that an existing national bass string instrument is slow in audio vibration, low in volume and dull in tone and a western violin is extremely inharmonious with the style of national music. A stem is designed to be in the shape of a hollow tube and is used as an auxiliary resonance cavity for a barrel which is used as a main resonance cavity, a membrane is a mocking leather membrane, at least six metal strings are uniformly distributed on the tubular stem and the barrel by means of drawing a bow, so that the main resonance cavity and the auxiliary resonance cavity realize a stereoscopic resonance effect, and audio is further filtered by the aid of a loudspeaker opening on the surface of the main resonance cavity and a loudspeaker opening on the surface of the auxiliary resonance cavity. The method for implementing the orchestral resonance instrument with a bass extension effect has the advantages that modern instrumental acoustic theories are applied on the basis of the resonance characteristics of the traditional string instrument, single structures in which a traditional bass Chinese fiddle and a Ke-hu which are used as resonance cavities are fundamentally changed, the stereoscopic resonance effect which is generated by the barrel used as the main circular resonance cavity and the tubular stem used as the auxiliary resonance cavity is highlighted, the audio of the instrument is further filtered by the aid of the loudspeaker opening of the surface of the barrel and the loudspeaker opening on the surface of the hollow stem, noise and murmur are effectively eliminated, and the tone quality, the volume and the tone are more balanced and melodious assuredly.
Owner:SHENYANG NORMAL UNIV
Cavity filter and cavity duplexer
ActiveCN105470608AStrong resonance characteristicsSmall footprintWaveguide type devicesSystem integrationResonant cavity
The invention relates to a cavity filter and a cavity duplexer. The cavity filter comprises a first cavity shell, a second cavity shell, a coupling channel and a cover plate, wherein a first resonant cavity is formed in the first cavity shell; a second resonant cavity is formed in the second cavity shell; the coupling channel is used for communicating the first resonant cavity with the second resonant cavity; the cover plate is used for sealing the first resonant cavity and the second resonant cavity; an input port communicated with the first resonant cavity is formed in the first cavity shell; an output port communicated with the second resonant cavity is formed in the second cavity shell; and the first cavity shell is arranged on the second cavity shell, and an inclined angle alpha is formed between the first cavity shell and the second cavity shell, wherein alpha is greater than or equal to 0 degrees and less than or equal to 180 degrees. The inclined angle is formed between the first cavity shell and the second cavity shell, so that a foldable structure is formed; the first cavity shell and the second cavity shell are not arranged on the same plane, so that the planar occupied area is reduced; the cavity shells can be even molded with a machine case or other modules together, so that the system integration can be implemented conveniently, the space can be fully utilized, and the miniaturization of the system can be facilitated; compared with the conventional basic-mode cavity filter, the cavity filter provided by the invention is less in resonant cavities and higher in resonance property; and the planar occupied area of the cavity filter can be even reduced by more than 50%.
Owner:COMBA TELECOM SYST (GUANGZHOU) LTD +1
Visible-Near Infrared Broadband Absorber Based on Porous Alumina and Preparation Method
ActiveCN105891917BSuitable for large-area batch productionLow costOptical elementsRefractive indexVisible near infrared
The invention discloses a porous-alumina-based visible near infrared broadband absorber. The porous-alumina-based visible near infrared broadband absorber includes a substrate, wherein a high-low refractive index medium anti-reflection film system is arranged on the front side of the substrate; a bipass porous alumina template is arranged on the back side of the substrate; and the porous alumina template is covered by a metal thin film. The invention also discloses a preparation method of the above absorber. The porous-alumina-based visible near infrared broadband absorber and the preparation method thereof utilize the porous alumina template and use the layer of thin high absorbability metal structure covered on the porous alumina to realize strong resonance between the medium and the metal on the bottom surface and the side wall of the porous alumina holes so as to realize absorption of visible near infrared wave band broadband. The porous-alumina-based visible near infrared broadband absorber has the advantages of being simple in structure, being simple and convenient in preparation, being low in cost, being convenient for mass and batched production. Therefore, the porous-alumina-based visible near infrared broadband absorber is expected to be widely applied to the fields of elimination of stray light, space detection, imaging, photo-thermal conversion and electromagnetic absorption.
Owner:上海高能煜镀科技有限公司
Cavity filter and cavity duplexer
ActiveCN105470608BReduce floor spaceFewer cavitiesWaveguide type devicesSystem integrationResonant cavity
The invention relates to a cavity filter and a cavity duplexer. The cavity filter comprises a first cavity shell, a second cavity shell, a coupling channel and a cover plate, wherein a first resonant cavity is formed in the first cavity shell; a second resonant cavity is formed in the second cavity shell; the coupling channel is used for communicating the first resonant cavity with the second resonant cavity; the cover plate is used for sealing the first resonant cavity and the second resonant cavity; an input port communicated with the first resonant cavity is formed in the first cavity shell; an output port communicated with the second resonant cavity is formed in the second cavity shell; and the first cavity shell is arranged on the second cavity shell, and an inclined angle alpha is formed between the first cavity shell and the second cavity shell, wherein alpha is greater than or equal to 0 degrees and less than or equal to 180 degrees. The inclined angle is formed between the first cavity shell and the second cavity shell, so that a foldable structure is formed; the first cavity shell and the second cavity shell are not arranged on the same plane, so that the planar occupied area is reduced; the cavity shells can be even molded with a machine case or other modules together, so that the system integration can be implemented conveniently, the space can be fully utilized, and the miniaturization of the system can be facilitated; compared with the conventional basic-mode cavity filter, the cavity filter provided by the invention is less in resonant cavities and higher in resonance property; and the planar occupied area of the cavity filter can be even reduced by more than 50%.
Owner:COMBA TELECOM SYST (GUANGZHOU) LTD +1
Dual-frequency-band circular concentric-square-shaped left-handed material unit
PendingCN110061358ASmall sizeStrong resonanceRadiating elements structural formsDual frequencyDielectric plate
The invention discloses a dual-frequency-band circular concentric-square-shaped left-handed material unit, and relates to the field of wireless communication; the dual-frequency-band circular concentric-square-shaped left-handed material unit comprises a dielectric plate (4) and a circular concentric-square-shaped patch (5) printed on the dielectric plate (4), wherein the circular concentric-square-shaped patch (5) is composed of two outer semicircles, two inner semicircles and a micro-strip line (3) passing through the circle center; the two outer semicircles are arranged up and down, and thetwo inner semicircles are rotated by 90 degrees around the center of a circle relative to the outer semicircles, and are arranged in a left-right manner; and two symmetric ground gaps are formed between the two outer semicircles, and four symmetric ground gaps are formed between the two inner semicircles and the micro-strip line. The dual-frequency-band circular concentric-square-shaped left-handed material unit is simple in structure, easy to implement and low in cost.
Owner:YUNNAN UNIV
Bragg grating biochemical sensor and method at interface between fiber core and cladding
ActiveCN105334190BMaintain narrow resonant bandwidth characteristicsHigh Q factorPhase-affecting property measurementsThermometers using physical/chemical changesFiberChemical industry
The invention discloses a Bragg grating biochemical sensor at the interface between the fiber core and the cladding and a method thereof. The Bragg grating biochemical sensor at the interface between the fiber core and the cladding includes an optical fiber core and an optical fiber cladding wrapping the optical fiber core. In that: the front section of the fiber core is provided with a long-period fiber grating, and the middle section of the optical fiber is located at the interface between the fiber core and the fiber cladding to set a Bragg grating at the interface between the fiber core and the cladding; the fiber core and the cladding The Bragg grating at the interface is composed of several linear grooves or several point-shaped grooves; the linear grooves or point-shaped grooves are periodically distributed along the axial direction of the optical fiber; the fiber core and The outer surface of the optical fiber cladding corresponding to the Bragg grating at the cladding interface is adsorbed with a silane layer; the invention can be widely used in the fields of biology, chemical industry, medicine, life science and the like.
Owner:CHONGQING UNIV OF TECH
A preparation method of SERS substrate based on 2D noble metal nanostructure
ActiveCN112921276BClosely arrangedEvenly distributedVacuum evaporation coatingSputtering coatingMicrosphereOxygen plasma etching
The invention provides a method for preparing a SERS substrate based on a 2D noble metal nanostructure, belonging to the technical field of nanoprocessing. Specifically: first self-assemble a layer of polymer microsphere array on the surface of the substrate, after oxygen plasma etching, the polymer microsphere array with a smooth surface becomes a plush polymer microsphere array, and use this structure as a template in the Precious metals are deposited on the surface, and the SERS substrate is obtained after etching away the template. The surface of the SERS substrate is covered with a noble metal layer with needle-like protrusion structures, the gap between the needle-like protrusion structures is less than 20nm, the nanostructures are densely arranged, evenly distributed, and have good periodicity, which is conducive to obtaining a continuous and uniform enhanced electromagnetic field, significantly The detection sensitivity of the SERS device is improved, and it has excellent repeatability and stability. In addition, the preparation method provided by the invention can also realize high-efficiency processing and large-scale production, and reduce production costs.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
An improved pillow instrument
The invention provides an improved structure of a pillow qin, comprising a base, a sound box, a peg box, a bridge and strings, the sound box is installed on the base, a peg box is arranged on the right side of the sound box, and the sound column There is a piano bridge vertically on the left side of the speaker panel, and a horizontal corresponding sound hole is provided on the speaker panel. The two sides of the speaker panel are vertically glued to the bottom plate with a string nut, and one end of the string is fixed on the left side of the speaker. On the string hole in the upper part, the other end of the string crosses the top of the bridge and is fixed on the peg in the peg box on the right side of the sound box. 3.5cm, the bridge described is a combined bridge, which is composed of four separate bridges. The pillow piano with this structure has beautiful and bright timbre, increased volume and wider range, and is easy to play. Freedom of features.
Owner:黄福安
a light emitting diode
ActiveCN108831981BReduce adverse effectsGuaranteed stabilityMaterial nanotechnologyNanoopticsQuantum wellThin layer
The invention discloses a light-emitting diode. A single-period reflector group, an active region, and a metal electrode are sequentially stacked from top to bottom. The single-period reflector group includes a transparent medium thin layer and a metal nano-thin layer. The active area includes a quantum well and metal nanoparticles with a wrapping layer located above the quantum wells, and the metal nanoparticles with a wrapping layer include metal nanoparticles and a wrapping layer. In the present invention, by optimizing the thickness of the active region and the distance between the metal nanoparticles and the single-period reflector structure, the optimization and improvement of the luminous efficiency of a specific waveband can be realized.
Owner:NANJING UNIV OF POSTS & TELECOMM
Kangen resonance instrument prolonging low pitch
InactiveCN102610217BReduce noiseBalanced and melodious soundStringed musical instrumentsResonanceBreathy voice
Owner:SHENYANG NORMAL UNIV
A blue organic light-emitting diode based on silver nano-cubic plasmon resonance enhancement and its preparation method
ActiveCN107275497BImprove performanceStrong resonanceMaterial nanotechnologySolid-state devicesHole transport layerLight-emitting diode
The invention discloses a structure and a preparation method of a blue light organic light emitting diode which utilizes the plasmon resonance effect of silver nanocubes to enhance device performance. Cubic layer, blue light emitting layer, electron transport layer, metal cathode. The introduction of silver nanocubes can effectively improve the performance of blue organic light emitting diodes. The preparation process includes: firstly adopting a synthetic method to prepare silver nanocubes, and then wrapping the silver nanocubes with a silicon dioxide layer. The preparation of the device is to clean the substrate first, then spin-coat to form a film, and then evaporate to form a film in a vacuum, and then cool it after the end. In the invention, the silver nanocube is spin-coated between the hole transport layer and the blue light emitting layer, and the efficiency of the blue light organic light emitting diode is effectively improved by utilizing the strong plasma resonance effect of the silver nanocube. The invention is simple and easy to implement, and has potential application value.
Owner:NANJING UNIV OF POSTS & TELECOMM
Resonance sound control device
ActiveCN108735190AResonance achievedStrong resonanceElectrophonic musical instrumentsKey pressingPiano
The present invention provides a resonance sound control device which can achieve middle resonance state in an electronic piano. The electronic piano includes plural keys and a sound source device (6)that emits a sound by pressing of the key, an intermediary resonance state of a resonance sound can be reproduced by including a resonance circuit (11) that inputs a sound source from the sound source device corresponding to the each key and outputs a resonance sound, a position detection sensor (SW) in which plural switches close sequentially according to a key pressing state of the key, and a resonance sound control device (10) that controls the resonance sound by an open / close state of plural switches by the position detection sensor (SW).
Owner:KAWAI MUSICAL INSTR MFG CO
Method for implementing orchestral resonance instrument with bass extension effect
InactiveCN102663997BReduce noiseBalanced and melodious soundMusical instrumentsBreathy voiceAcoustic theory
A method for implementing an orchestral resonance instrument with a bass extension effect is designed for solving problems that an existing national bass string instrument is slow in audio vibration, low in volume and dull in tone and a western violin is extremely inharmonious with the style of national music. A stem is designed to be in the shape of a hollow tube and is used as an auxiliary resonance cavity for a barrel which is used as a main resonance cavity, a membrane is a mocking leather membrane, at least six metal strings are uniformly distributed on the tubular stem and the barrel by means of drawing a bow, so that the main resonance cavity and the auxiliary resonance cavity realize a stereoscopic resonance effect, and audio is further filtered by the aid of a loudspeaker opening on the surface of the main resonance cavity and a loudspeaker opening on the surface of the auxiliary resonance cavity. The method for implementing the orchestral resonance instrument with a bass extension effect has the advantages that modern instrumental acoustic theories are applied on the basis of the resonance characteristics of the traditional string instrument, single structures in which a traditional bass Chinese fiddle and a Ke-hu which are used as resonance cavities are fundamentally changed, the stereoscopic resonance effect which is generated by the barrel used as the main circular resonance cavity and the tubular stem used as the auxiliary resonance cavity is highlighted, the audio of the instrument is further filtered by the aid of the loudspeaker opening of the surface of the barrel and the loudspeaker opening on the surface of the hollow stem, noise and murmur are effectively eliminated, and the tone quality, the volume and the tone are more balanced and melodious assuredly.
Owner:SHENYANG NORMAL UNIV
Bamboo erhu
The invention discloses a bamboo erhu. The bamboo erhu comprises a canister, a slim neck, a collect, erhu skin, an erhu shaft, a headstock, a string and a jack thread, wherein the right end of the canister is covered by the erhu skin, the left end of the canister is provided with an opening, the slim neck is arranged at the right end of the canister, a tubular resonance tube is horizontally arranged in the canister, a gap is formed between the periphery of the resonance tube and the inner wall of the canister, the positions, corresponding to the slim neck, of the upper and lower walls of the resonance tube are provided with holes, the slim neck runs through the holes in the upper and lower walls of the resonance tube, the slim neck tightly cooperates with the resonance tube, the left end of the resonance tube is closed, the right end of the resonance tube is provided with an opening, the upper and lower walls of the left end of the resonance tube are provided with amplification holes,the amplification holes in the upper and lower walls are opposite, the amplification holes are of long-strip shapes and arranged in the length direction of the resonance tube, and the erhu is made from bamboo. The bamboo erhu has very soft and smooth, strong resonance, sonorous sound and a good spreading effect.
Owner:贵州新锦竹木制品有限公司
Shock wave generating device and method for increasing yield of oil-gas well
InactiveCN111608625AStrong shock waveImprove the effect of increasing productionFluid removalVibration devicesCapacitanceTransformer
An embodiment of the invention provides a shock wave generating device and a method for increasing the yield of an oil-gas well, and relates to the technical field of electric pulses. The shock wave generating device comprises a power supply, a transformer, a rectifying device, a high-voltage energy storage capacitor, a discharge switch and an underwater load which are electrically connected in sequence. The power supply is used for providing electric energy for continuous work of the shock wave generating device, the transformer and the rectifying device are used for converting low-voltage alternating current output by the power supply into needed high-voltage direct current, the high-voltage energy storage capacitor is used for storing the electric energy, and the discharge switch is used for enabling the electric energy stored by the high-voltage energy storage capacitor to be loaded to the underwater load after being switched on to form shock waves. The method for increasing the yield of the oil-gas well adopts the shock wave generating device, and the frequency of formed shock waves is equal to the natural vibration frequency of a reservoir in the oil-gas well. According to the device and the method, the shock waves generated by electric pulse discharge and reservoir resonance in the oil-gas well are used for increasing the yield of the oil-gas well, and the device and themethod have the advantages of high shock wave strength, good yield-increasing effect and high working repeatability and stability.
Owner:SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV +1
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