42results about How to "Strong resonance" patented technology

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.

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.

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%.

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.

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.

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.

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.