167results about How to "Good resonance effect" patented technology

The invention relates to the field of fiber sensing and biological microfluidic detection and provides a fiber sensor with high sensitivity and small coupling loss. A technical scheme employed in the invention is as follows: the surface plasma resonance sensor based on photonic crystal fiber comprises a continuous broadband light source, a fiber coupling output assembly, an SMA905-to-FC interface jumper, a fiber coupling assembly, a photonic crystal fiber and a spectral detection unit, wherein, one end of the photonic crystal fiber is connected with the fiber coupling assembly, the other end of the photonic crystal fiber is connected with the spectral detection unit, the end of SMA905 interface of the SMA905-to-FC interface jumper is connected with the continuous broadband light source and the fiber coupling output assembly, and the end of FC interface of the SMA905-to-FC interface jumper is connected with the fiber coupling assembly through a flange. The invention is mainly applied for biological microfluidic detection.

The invention discloses an application method of a PFC (power factor correction) controller in a Buck circuit. A switch tube and a free-wheel inductor TR2 are serially connected into a main power loop in the Buck circuit, a reference voltage source is connected into a MULT end of the PFC controller, current of the free-wheel inductor TR2 is detected by a ZCD (zero current detection) end of the PFC controller, and the switch tube is driven to be switched on and off by a GD (general dynamic) end of the PFC controller. The high-voltage Buck circuit is controlled by a PFC controller chip, and problems that a Buck type resonant soft switching circuit is high in implementation cost and poor in resonant soft switching effect, voltage stress of a switch tube is high and the like are solved. In addition, circuits of the application method are simple in structure and fine in resonant effect, and switching-on and switching-off of zero voltage are realized simultaneously.

The invention discloses a tuned mass damper structure with continuously variable frequency. The tuned mass damper structure comprises a main mass block, a guide mechanism, a constant-stiffness elastic support, a damping unit and a base, wherein the main mass block and the base together constitute a main support structure; the tuned mass damper structure further comprises a stiffness-adjustable elastic support positioned between the main mass block and the base; the stiffness-adjustable elastic support comprises an elastic beam, a sliding part and a fastening piece; the right end of the elastic beam is fixedly mounted on the base; the sliding part is mounted on the main support structure in a position-adjustable manner and can slide in the longitudinal direction of the elastic beam; the fastening piece is used for fixing the sliding part on the main support structure after the sliding part slides to a set position. The tuned mass damper structure has the advantages that stepless adjustment of the support stiffness can be realized in a larger range, tuned mass damper products with the same models can meet vibration damping requirements of base structures of different vibration frequency and also can be used for reducing vibration of base structures with time variable vibration frequency.

The invention discloses an ultrasonic washing device. The device comprises a body installed on a wall body, a washing tank, an ultrasonic generator and a water supply box, wherein the body is providedwith the washing tank used for placing a washing liquid; the ultrasonic generator has a ultrasonic vibration end generating ultrasonic vibration, and the ultrasonic vibration end faces towards the washing tank; and the water supply box is detachably arranged on the body and provides the washing liquid to the washing tank. The ultrasonic washing device can be conveniently installed, an occupationspace is small, the ultrasonic vibration end is directly contacted with infiltrated laundries, and an ultrasonic consumption can be greatly reduced so that a stain removing effect is good; and simultaneously, the water supply box is detachably arranged on the body so that the water supply box can be conveniently taken down and replaced at any time or the washing liquid can be added, a water amountcan be saved, and a washing process is convenient and fast.

The invention discloses an ultrasonic washing device. The device comprises a body and a cover body. The cover body is arranged on the body in an opened/closed mode. The body is provided with an ultrasonic generator and a washing tank used for placing a washing liquid. The ultrasonic generator has an ultrasonic vibration end generating ultrasonic vibration, and the ultrasonic vibration end faces towards the washing tank. When the cover body is closed, the ultrasonic generator and the washing tank are covered in the cover body. When the cover body is opened, a laundry can be put into the washingtank for cleaning. In the invention, the ultrasonic generator and the washing tank can be covered in the ultrasonic washing device; the device is dustproof, the internal neatness of the ultrasonic washing device is maintained, and the overall aesthetics of the ultrasonic washing device is greatly increased; and simultaneously, the device is convenient for packaging and transportation, and the ultrasonic generator can be prevented from being scratched and damaged during a transport process.

The invention discloses a washing machine with a partial pre-washing function. The washing machine comprises an ultrasonic washing device; the washing machine is provided with an accommodating space for accommodating the ultrasonic washing device, and the ultrasonic washing device can be arranged in the accommodating space in a screw-in/screw-out manner. The whole ultrasonic washing device is embedded in the washing machine and integrally assembled with the washing machine, normal clothes washing is not influenced, and the washing machine is also endowed with the partial pre-washing function.The washing machine partially emits high-frequency ultrasonic waves to initially-wet clothes by utilizing the cavitation function of the ultrasonic waves, so that stains such as oil stains are emulsified under the function of a sound field, solid ions are separated from the clothes, surface purification is achieved, partial stubborn stains are removed, and the partial pre-washing function on the clothes is achieved.

The invention relates to a weak signal detection method based on adaptive piecewise nonlinear bistable stochastic resonance, and belongs to the technical field of signal processing. In order to extract weak signal under strong noise background, the invention combines an exponential function and a classical bistable potential function model to propose a novel piecewise nonlinear bistable stochasticresonance system. The method based on this system firstly pretreats the noisy signal to satisfy the small parameter condition of adiabatic approximation theory, Then the searching range of the parameters of piecewise nonlinear bistable system is set according to the known conditions, and the parameters of piecewise nonlinear bistable system are optimized by using the average signal-to-noise ratiogain as the performance average index, so as to produce the best resonance effect. The piecewise nonlinear bistable potential well model proposed by the invention has the advantages of the exponential type single potential well model and the traditional bistable model, and has universal significance in practical application. Adaptive optimization algorithm is used to optimize the system parameters, which avoids the poor resonance effect caused by the poor selection of system parameters.

The invention aims at providing a hydraulic drive continuously variable gas inlet system which comprises a gas inlet main pipe, a resonant cavity, gas inlet manifolds and hydraulic cavities, wherein the gas inlet main pipe, the resonant cavity and the gas inlet manifolds are sequentially connected, the length of the gas inlet manifolds can be changed, and the hydraulic cavities are sleeved on the gas inlet manifolds for adjusting the length of the gas inlet manifolds. According to the hydraulic drive continuously variable gas inlet system, under different working conditions, the length of the resonance gas inlet manifolds can be changed so that good resonance effects can be achieved in a wide rotation speed range of an engine, the gas inlet efficiency of the gas engine can be improved, the output power can be improved, and the economy is improved.

The invention discloses composite ink, a preparation method thereof, and a device. The composite ink includes nano metal particles and nano metal oxide particles, which are dispersed in a mixed solvent comprising a basic organic solvent and a higher alcohol solvent. The physical properties, such as viscosity, surface tension and boiling point, of the composite ink satisfy the present ink-jet printing equipment. After annealing and volatilization of the solvent, the nano metal oxide particles and nano metal particles can be separated into different phases, so that quenching of light emitted from the luminescent material is prevented. The nano metal particles in the composite ink have a surface-enhanced resonance effect so that light-emitting efficiency of the light emitting diode device isimproved significantly. The higher alcohol solvent can effectively avoid phenomena, such as ejection failure of a nozzle, non-uniform ink drips, smearing, coffee ring and the like, which are disadvantages of printing operation with the composite ink.

The invention discloses an ultrasonic punching machine solving the technical problems that the traditional ultrasonic punching machine is easy to cause cracks around a punching point and fracture at the edges of a thin material when drilling a though hole in a hard and brittle material. The ultrasonic punching machine comprises a numerical control milling machine (1), a numerical control milling machine controller (2), a numerical control milling machine main-shaft rotating component (3) with a main-shaft through hole (14), a visual system component (4), an industrial control computer (5), a numerical control milling machine worktable (6), a stabilized voltage power supply (8) and an ultrasonic power supply (9), wherein a collecting ring component (15) is fixedly arranged at the top end of the main-shaft through hole (14); a piezoelectric ceramic transducer (10) and a fixed sleeve (12) thereof are fixedly arranged in a conical interface (13) at the bottom end of the main-shaft through hole (14); and the lower end of the piezoelectric ceramic transducer (10) is fixedly connected with a drill (11). The invention can be widely applied to the industries for manufacturing thin or thick film substrates and semiconductors, the aerospace industry, and the like.

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.

The invention relates to a structure control method based on a shield tunnel lining viscoelasticity fractional derivative model. The method comprises the following steps that (1) a soil body is controlled, wherein the inner diameter, the outer diameter and the thickness value of a lining are collected, and the relation of the displacement of the soil body under the action of power loads and the radial stress of the soil body is obtained according to a viscoelasticity principle; (2) the lining is controlled, wherein the radial stress and the circumferential stress, the radial displacement and the material density of the lining are detected, and the relation of the stress and the displacement of the lining is calculated through the fractional derivative model; (3) a boundary condition is controlled, wherein the lining and the soil body are set to be in complete and close contact, that is, continuous displacement and stress is met, the relations of the displacement and the stress obtained in the step (1) and the step (2) are combined, the relation of the stress and the displacement of the viscoelasticity soil body and the lining is obtained, and control over the shield tunnel lining is achieved by controlling soil body damping, the thickness of the lining and materials. Compared with the prior art, the structure control method has the advantages of being small in computing amount, strong in interference restraining capacity, stable in adjustment, high in adjusting precision and the like.

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.

The invention provides a modularized speaker device placed on a computer disk rack, which comprises a 5.25-inch speaker carrier corresponding to the width and the height of a 5.25-inch disk rack of acomputer host shell, and is positioned in the 5.25-inch disk rack. The 5.25-inch speaker carrier comprises a shell, a panel, one or two speaker monomers, a reecho body, a sound effect amplification circuit board, a power supply input terminal, and an audio signal connection terminal. The invention provides the modularized speaker device which can change a multimedia speaker to standard configuration and is placed on the computer disk rack, and particularly relates to the 5.25-inch disk rack matched with the shell of a personal computer to place and fix the modularized speaker, and form the device for outputting the multimedia sound effect of the personal computer by connecting with a power supply and audio signals.

The invention provides a coupling resonance type underwater acoustic covering layer with a functional gradient plate. The coupling resonance type underwater acoustic covering layer comprises an outercovering layer, an inner covering layer and a functional gradient plate body, the outer covering layer and the inner covering layer are laid on the two sides of the functional gradient plate body, periodic cavities are formed in the outer covering layer and the inner covering layer, and the outer covering layer cavities and the inner covering layer cavities are in one-to-one correspondence in position and different in shape. The outer covering layer and the inner covering layer are laid on the two sides of the functionally gradient plate, the sound absorption performance of the acoustic covering layer in the low-frequency range is improved through coupling of the outer covering layer, the inner covering layer and the functionally gradient plate in this way, and the sound absorption frequency range of the covering layer is effectively widened. And the influence of the dynamic behavior of the functionally gradient plate on the sound absorption characteristic of the covering layer plays aleading role. Due to the resonance effect of the functionally gradient plate, coupled resonance can be generated between the cavity and the functionally gradient plate in a low-frequency range, a strong absorption effect can be generated on low-frequency sound waves, meanwhile, the resonance effect of the acoustic covering layer at a specific frequency is enhanced, and energy dissipation of the sound waves is enhanced.

The invention discloses a making process of a Mongol stringed instrument box. First, a bottom board and a surface board are made; then, side boards are made; and finally, box preprocessing and box assembly are performed. The making process of a Mongol stringed instrument box overturns the traditional making process, and saves the time of making. The water content of wood at local gaps is raised or reduced to 40%, the water content at the moment is equal to the water content when wood fibers are saturate, and the water content is most suitable for bending a long wooden board; and then, heating is performed to reduce the water content. Sodium hydroxide can decompose hemicelluloses in wood and reduce hydroxyl in wood. Paraffin used can go into the capillary pores in the surface and middle layers of wood at high temperature, and fill the capillary pores after cooled and solidified. Thus, outside moisture is prevented from going into wood again, and deformation of wood is prevented effectively. Then, the surface of wood is uniformly and fully coated with trimethyl chlorosilane, which can modify wood. After modification, the water absorption rate is reduced, and the hydrophobic property of the surface of wood is enhanced.

The present invention relates to a honeycomb body (1) having at least one housing (2) and a honeycomb structure (3) for a waste-gas purification system (4) having at least one sheet material (5), wherein the sheet material (5) has elevations (7) in at least one section (6) and an edge contour (8) enclosing the elevations (7) and a portion of the area of the elevations (7) in the at least one section (6) is at least 80 %.

The invention discloses an enhancement type silencer which comprises a cylinder body, a resonance chamber and expansion chambers. The resonance chamber and the expansion chambers are located in the cylinder body. Each expansion chamber is provided with an engine exhaust gas inlet and provided with a flow guide cover used for guiding engine exhaust gas entering the expansion chamber towards the direction of the resonance chamber. The flow guide covers can guide the engine exhaust gas entering the expansion chambers so that the gas flow of the engine exhaust gas can be prevented from directly acting on the side walls of the expansion chambers; meanwhile, the flow guide covers guide the gas flow towards the direction of the resonance chamber so that the phenomenon that the engine exhaust gas does not flow smoothly in the expansion chambers can be avoided, it is ensured that the exhaust resistance is reduced, and the power losses of an engine are reduced; and in addition, the flow guide covers play a guiding role in sound waves, the resonance efficiency and strength of the sound waves are improved to some extent, it is ensured that the silencing effect is better, the silencing strength is greatly improved, exhaust noise is lowered easily, and noise pollution is avoided.

The invention relates to a patterned nuclear-shell nanoparticle surface enhanced Raman spectroscopy (SERS) active substrate and a preparation method. Nuclear-shell nanoparticles are composed of shelllayers of spherical (Au) particles and nuclear layers of magnetic (Ni) particles; and the patterned Ni@Au nuclear-shell nanoparticles are used as a SERS active substrate which can be used for efficient unimolecular SERS detection. The large-area patterned Ni@Au nuclear-shell nanoparticles are prepared by using a method by combining direct laser interference erosion with annealing double-layer metal films. A surface plasma resonance coupling effect between Au nanoshells and magnetic Ni nano nucleuses enables the particles to have more excellent SERS performance compared with pure Au nanoparticles. The simple method is provided for the large-area, high-flux and high-sensitivity SERS active substrate, and potential application prospects are achieved in fields such as bioimaging, security detection and catalysis.

The invention discloses composite ink, a preparation method thereof, and a device. The composite ink includes nano metal particles, a high molecular material and P-type nano metal oxide particles, which are dispersed in an alcohol solvent. The physical properties, such as viscosity, surface tension and boiling point, of the composite ink satisfy the present ink-jet printing equipment, and the composite ink can be used for producing an electron injection layer and/or an electron transfer layer of a light-emitting diode device. After annealing and volatilization of the solvent, the P-type nano metal oxide particles and nano metal particles can be separated into different phases, so that quenching of light emitted from the luminescent material is prevented. The nano metal particles in the composite ink have a surface-enhanced resonance effect while the high molecular material can balance cavities and electrons and improve composition efficiency of the cavities and electrons, so that light-emitting efficiency of the light emitting diode device is improved.