643 results about "Resonance effect" patented technology

Apparatus and methods are disclosed for reducing the potentially harmful effects of electromagnetic waves on an implantable medical device. In one embodiment of the present invention, an implantable medical system comprising a dual threshold magnetic sensor capable of detecting an elevated magnetic field is disclosed. The sensor can comprise a solid-state sensor capable of detecting a static magnetic field in excess of about 1500 Gauss. The magnetic sensor can be operatively coupled to electronics that are capable of altering the operation of the system upon detection of an elevated magnetic field by the magnetic sensor.

Mechanically tunable electromagnetic and photonic devices featuring enhanced spectral tunability with minimal mechanical movement are provided. These nano / micro-electromechanically (N / MEMS) tunable elements, including filters and pixels, rely on leaky-mode resonance effects in subwavelength photonic lattices that constitute periodic wavelengths. Such elements can operate in reflection (bandstop) or transmission (bandpass) modes, and can be arranged in one-dimensional or two-dimensional arrays, or operated as single units, and their spectral regions are controlled by the element design. Input electromagnetic radiation illuminates the element and is then filtered, modulated, analyzed or tuned by the element. Mechanical motion alters the structural symmetry, and therefore, the tuning properties, of the nanostructured subwavelength resonance elements. Further, incorporating metals and dielectrics to generate coexisting plasmonic and leaky-mode resonance effects adds to the versatility of the potential applications.

A cellular phone having a first opening for delivering voice on a shell is provided. A printed circuit board (PCB) is disposed within an inner space enclosed by the shell and divides the inner space into a first acoustic room and a second acoustic room. A speaker is disposed within the first acoustic room and electrically connects the PCB. A through hole is formed on the PCB to communicate the first acoustic room and the second acoustic room to increase the size of total resonance chamber for improving resonance effect in low frequency voices. Furthermore, at least a second opening is formed on the shell to communicate the first acoustic room or the second acoustic room to the environment for flattening the resonance curve to improve the voice quality.

Mechanically tunable electromagnetic and photonic devices featuring enhanced spectral tunability with minimal mechanical movement are provided. These nano / micro-electromechanically (N / MEMS) tunable elements, including filters and pixels, rely on leaky-mode resonance effects in subwavelength photonic lattices that constitute periodic wavelengths. Such elements can operate in reflection (bandstop) or transmission (bandpass) modes, and can be arranged in one-dimensional or two-dimensional arrays, or operated as single units, and their spectral regions are controlled by the element design. Input electromagnetic radiation illuminates the element and is then filtered, modulated, analyzed or tuned by the element. Mechanical motion alters the structural symmetry, and therefore, the tuning properties, of the nanostructured subwavelength resonance elements. Further, incorporating metals and dielectrics to generate coexisting plasmonic and leaky-mode resonance effects adds to the versatility of the potential applications.

A method for using a double resonance effect within a grating-coupled waveguide (GCW) sensor, as generated from a light beam with a given span of wavelengths or angles, is provided. The method can be used for label-independent detection of biological and chemical agents, to interrogate biological-binding events or chemical reactions within a sensing region at increased sensitivity, and with decreased sensitivity to environmental perturbations. Also described is an optical interrogation system incorporating the method.

An apparatus and method of encoding an audio signal and an apparatus and method of decoding an audio signal. The audio decoding method includes: generating an audio signal by decoding an input signal, and transforming an original waveform of the generated audio signal into a compensation waveform that is compensated for an acoustic resonance effect in the audio signal. Therefore, an audio signal having excellent sound quality without an amplified middle band can be heard via earphones, headphones, or a phone earpiece by using an inverse compensation waveform to compensate an ERP-DRP resonance effect, which is an acoustic resonance effect generated due to the structure of the human ear.

The invention provides a whispering gallery mode photonic device and a preparation method thereof. According to the preparation method of a micro ring array structure, solvent droplets are utilized to dissolve a polymer film, so that a "coffee ring effect" can be generated, and therefore, polymer can be accumulated at the periphery of liquid so as to form an annular structure of which the height is obviously different from the height of the film, and conduction and confinement of light in the polymer structure can be realized; and light signals are inputted to the micron ring structure through utilizing excitation, scattering or near field coupling modes, so that a resonance effect in a whispering gallery mode can be realized. The prepared micron ring structure can be adopted as a high-quality factor optical micro cavity, so that a modulation-mode spectrum can be obtained, the width of spectral lines of the spectrum being significantly narrowed; a whispering gallery-mode light amplification stimulated emission can be realized through optical gain; and in a multi-ring coupled array structure, light signal processing and high sensitive response to outside stimuli can be realized according to the wavelength change information of the modulated spectrum and laser modes.

An EL display is provided with enhanced light emission characteristics wherein light emitted from a light-emitting layer undergoes constructive interference due to a resonance effect. The EL display includes a transparent substrate, an anode and a cathode formed on the same side of the transparent substrate, and an intermediate layer interposed between the anode and the cathode, and said intermediate layer including a light-emitting layer that emits light when the anode and the cathode are electrically driven by a voltage, and wherein the anode and the cathode are formed as a translucent conductive layer that partially reflects the light emitted from the light-emitting layer.

The invention relates to an air intake manifold with an integrated air track, which comprises an air throttle (1) of an air inlet of an engine, a resonant cavity (2) of the air intake manifold, a plurality of branch pipes (3) of the air intake manifold, and a connecting flange (4), wherein the air throttle (1) at the upper end of each branch pipe (3) of the air intake manifold is communicated with the resonant cavity (2) of the air intake manifold; and air outlets at the lower parts of the branch pipes (3) of the air intake manifold are respectively connected with cylinder covers through the connecting flange (4). The air intake manifold is characterized in that the air intake manifold further comprises the air track (5) and a plurality of air track connecting branch pipes (6), wherein the air track connecting branch pipes (6) are corresponding to the branch pipes (3) of the air intake manifold one to one; and the air track (5) is communicated with the lower end of each branch pipe (3) of the air intake manifold through the corresponding air track connecting branch pipe (6). When the air intake manifold is fully loaded, resonance effects achieved at low rotating speeds and trough rotating speeds can be optimized, so that the air intake quantity is increased; when the air intake manifold is partially loaded, pumping loss of the engine is decreased, the fuel consumption rate is reduced, and the requirements for buses in different working conditions can be satisfied.

The invention relates to a micro-ring waveguide optical device capable of realizing all-optical signal processing by utilizing a high-nonlinearity effect, and aims to overcome the defect that nonlinear coefficients are insufficient when a conventional micro ring performs all-optical signal processing. The provided micro-ring waveguide optical device comprises a straight waveguide and a parallel growth micro ring on a substrate, wherein the micro ring is an annular resonant cavity; the ridge waveguide part of the micro ring adopts a parallel slot structure instead of a single ridge waveguide structure; and the straight waveguide is coupled with the micro ring. According to the micro-ring waveguide optical device, one parallel slot micro-ring waveguide structure is innovated; and when light is coupled into the parallel slot micro-ring waveguide structure, the slot waveguide structure can well limit a light field, the light intensity of resonance light is enhanced greatly due to the resonance effect of the micro ring, accordingly, various nonlinear effects of the micro ring are enhanced, the threshold value is reduced, the efficiency is improved, and the device can be applied to the all-optical signal processing fields such as optical frequency comb, wavelength conversion, logic gate, format conversion and the like.

The invention provides a sensor for nano gold particles and a preparation method thereof. The end surface of a multi-core optical fiber is of a conical-platform structure; a total-reflection film is plated on the surface of the conical platform; the nano gold particles which are distributed regularly are fixed on the end surface of the optical fiber plated with the total-reflection film; exciting light is injected into one fiber core of the multi-core optical fiber, is reflected to the end surface of the optical fiber at the film-plated position of the conical platform and generates total internal reflection on the end surface of the optical fiber, and a generated evanescent field excites a localized surface plasmon resonance effect of the nano gold particles; the reflected light is collected by the fiber core symmetrical to the fiber core injected with the exciting light, and the change of the physical quantity of external substances is sensed by the spectrum of the reflecting light. The sensor and the preparation method have the advantages that the multi-core optical fiber, a self-assembly technology of a near-field optical tweezer and the localized surface plasmon resonance effect of the nano gold particles are combined, and the near-field optical tweezer of the multi-core optical fiber can be utilized for capturing the nano gold particles, so that the optical self-assembly and regular distribution is carried out on the nano gold particles according to the distribution rule of the capturing areas; the structure is simple, the volume is smaller and the repeatability is high.

An organic electroluminescent device induces optical resonance with a simple structure, the organic electroluminescent device including: a transparent substrate; a semi-transparent layer formed on the transparent substrate; a first anode layer formed on the semi-transparent layer as a predetermined pattern; a cathode layer formed of a metallic total reflection layer on the first anode layer; and an organic layer formed between the first anode layer and the cathode layer, which includes at least an emitting layer, wherein an optical distance between a top surface of the semi-transparent layer and a bottom of the cathode layer is determined to be a least integer multiple of half the peak wavelengths of light of a predetermined set of colors. Due to a resonance effect of the organic electroluminescent device, the emission efficiency of wavelengths of light of different colors is improved, and high-purity quality pictures may be displayed on the organic electroluminescent device.

The invention provides an asymmetric Au particle array and FP cavity coupled refractive index sensor which comprises an insulation substrate, a metal film reflection layer, a transparent medium layer and a two-dimensional metal unit array, wherein at least one surface of the insulation substrate is polished; the metal film reflection layer is deposited on a polishing surface of the substrate; the transparent medium layer is deposited on the metal film reflection layer; the two-dimensional metal unit array is formed on the transparent medium layer, each metal unit in the two-dimensional metal unit array is an asymmetric unit, and is composed of two metal nano columns arranged along the surface of the substrate, and an F-P cavity loop is formed between the two metal nano columns of each metal unit and the metal film reflection layer just below the two metal nano columns. According to the asymmetric Au particle array and FP cavity coupled refractive index sensor, by combining an asymmetric Fano resonance effect and coupling an LSP mode and an FP cavity mode, the full width at half maximum of a resonance valley of the sensor can be reduced, and thus the performance of a local area surface plasma sensor is improved.

An active multimode optical fiber consisting of a first core section (11), a thin barrier layer (12) material having a thickness (d2) and a lower refractive index than that of the first core section by an index difference (Δn), a second core section (13) having a refrective index equal or higher than that of the first core section, and a cladding (14) having an index lower than that of the first core section. Said index difference and said thickness are selected so that a fundamental core mode couples less strongly with said cladding modes than higher order core modes. A scheme of changing the symmetry of the fiber for reduced sensitivity of the fundamental mode of the first core section to resonance effects.

A high voltage DC circuit breaker includes a semiconductor switching assembly in series with a mechanical switch. When the semiconductor switching assembly is switched off due to a current fault, a residual current flowing through arresters of the semiconductor switching assembly is switched off by the mechanical switch. A capacitor arranged parallel to the mechanical switch leads to passive resonance effects, which in turn induce current zero crossings in its arc. The current zero crossings allow for reliable extinguishing of the arc. The mechanical switch can be an AC circuit breaker.

This invention is a method for multi-slice CBF imaging using continuous arterial spin labeling (CASL) with an amplitude modulated control which is both highly effective at controlling for off resonance effects, and efficient at doubly inverting inflow spins, thus retaining the signal advantages of CASL versus pulsed ASL techniques.

The invention relates to a 360-degree full field-of-view angle diffractive optical element and a method for designing the same. The diffractive optical element comprises a substrate layer and a plurality of nanometer bricks etched and arranged periodically on the working surface of the substrate layer. The substrate layer can be divided into a plurality of unit structures corresponding to the nanometer bricks. The unit structures have the same length, width, and height. Each individual unit structure has a square working surface with a side length of 400nm. All the nanometer bricks have the same size. The length, the width, and the height of each nanometer brick are 200nm, 120nm, and 310nm respectively and are all sub-wavelength scales. The nanometer bricks are arranged on the corresponding unit structures with different orientation angles, wherein each different orientation angle is half of the phase of the corresponding nanometer brick. The diffractive optical element ingeniously utilizes the geometrical phase and the electromagnetic resonance effect of a nanometer brick array material, realizes a simultaneous front and back transmission function which cannot be realized by a traditional diffractive optical element, expands the reachable range of diffracted light, and realizes half transmission energy and half reflection energy in a specific wavelength and precise and continuous phase control.

An organic light emitting display (OLED) device having an organic light emission unit, the organic light emitting unit including a first electrode layer on a substrate, a second electrode layer on the first electrode layer, and an organic layer between the first electrode layer and the second electrode layer, the OLED device including a first auxiliary electrode layer between the organic layer and the first electrode layer. The organic light emission unit is divided into first, second, and third pixel units. Each of the first, second, and third pixel units includes a second auxiliary electrode layer between the organic layer and the first auxiliary electrode layer. The second auxiliary electrode layers of the first, second and third pixel units are formed to have different thicknesses respectively, so that light beams emitted from the first, second and third pixel units can be provided with a resonance effect.

The proposed soft-switching DC / DC converter includes a converter circuit including a main switch having a first, a second and a control terminals for converting an input DC voltage to an output DC voltage, a resonant circuit electrically connected to the converter circuit, and an energy transferring circuit including an auxiliary switch having a first, a second and a control terminals and magnetically coupled to the resonant circuit. In which, the main switch is turned on under a specific voltage across the first and the second terminals of the main switch and the auxiliary switch is turned off under a specific current flowing through the first and the second terminals of the auxiliary switch both controlled by the resonant circuit through a resonance effect so as to accomplish a soft-switching of the converter.

The invention relates to a method which is developed on the basis of the impacts of biological molecules on the single nanoparticle localized surface plasmon resonance effect and uses a localized surface plasmon resonance spectrum for detecting biological molecules, thereby solving the controllable preparation of the nanoparticle and eliminating non-specific absorption and parasitic light signalsduring the detection on the basis of positioning, orienteering, being coupled with a microfluidic system and optimizing a signal collection region in a micro-channel. The invention comprises the stepsof using the vapor deposition technology and the advanced preparation technology of micro-nano materials and structures to prepare the identifiable signal nanoparticle or a particle array in a micro-fluid, integrating the single nanoparticle or the particle array in the micro-channel, further modifying and functionalizing the surface thereof and using an optical signal generated by the impacts ofthe biological molecules on the nanoparticle localized surface plasmon resonance effect for detecting the type and the concentration of the biological molecules in the fluid. Therefore, a high-yieldsuper-sensitive chip-based biological molecule detector is constructed in the micro-channel.

The invention discloses a polycell collaborative coupling acoustic meta-material design method. The method comprises a structure design method with insufficient localization rigidity and a structure design method with sufficient localization rigidity, wherein the structure design method with insufficient localization rigidity adopts a separating framework with localization rigidity lower than thinplate rigidity to separate local area resonance cells, so that strong coupling resonance behaviors of a single cell is generated, and a polycell combined structure with lumped coupling resonance effect is formed; the structure design method with sufficient localization rigidity adopts the separating framework with localization rigidity higher than thin plate rigidity, so that resonance of a single cell is not mutually affected within a design frequency band; and cells with gradient distribution of multiple thin plate widths, thin plate thicknesses or additionally mass block weight structure parameters define a polycell combined structure. The polycell collaborative structure can be applied to various transfer tools and various building decorations, and provides a brand-new denoising scheme for creating a low-noise environment.

An active multimode optical fiber consisting of a first core section (11), a thin barrier layer (12) material having a thickness (d2) and a lower refractive index than that of the first core section by an index difference (Δn), a second core section (13) having a refractive index equal or higher than that of the first core section, and a cladding (14) having an index lower than that of the first core section. Said index difference and said thickness are selected so that a fundamental core mode couples less strongly with said cladding modes than higher order core modes. A scheme of changing the symmetry of the fiber for reduced sensitivity of the fundamental mode of the first core section to resonance effects.

The invention discloses a variable-speed circumferential low-stress bending fatigue crack precise blanking machine and a blanking method of the variable-speed circumferential low-stress bending fatigue crack precise blanking machine. The variable-speed circumferential low-stress bending fatigue crack precise blanking machine comprises a variable-frequency motor, a large belt pulley, a V-shaped belt, a small belt pulley, a two-stage gear accelerator, a high-speed main shaft, a sliding rail supporting seat, a screw compression spring, a columnar hammer head, a feeding sleeve, a ball guide bushing, metal bars, a clamping hand, a clamping cylinder, a feeding cylinder, a hydraulic clamping feeding mechanism support, a machine body, a seat plate, a servo motor, a speed reducer, a coupler, a ball screw supporting seat, a screw, a nut, a ball screw, a deep groove ball bearing and a key. The variable-speed circumferential low-stress bending fatigue crack precise blanking machine is high in geometric precision of blanking workbanks, free of corner collapse and radial deformation, perpendicular and smooth in fracture section, few in burrs, and high in use ratio of material. The stress concentration effect, the resonance effect and the bending fatigue of an annular V-shaped groove are utilized to enable the critical value of the impact speed of vibration on the metal bars to be lower than the critical value of the speed in the high-speed shearing process, and the blanking machine is applicable to precise blanking of the metal bars of different materials.

Systems, apparatus and methods are discussed for controlling resonance in in-the-ear headphones. Resonance effects resulting from wave reflection and superposition can occur in the cavity formed by the port tube of an earbud and the wearer's ear canal. In this invention, acoustically resistive structures are provided to create sound diffusion in the cavity. In one embodiment, a spring coil with several adjustable parameters is inserted into the port tube. In another embodiment, a pattern of grooves is carved into the inner surface of the port tube. Porous filters can also be used in conjunction with both of the embodiments described above. The result of providing the resistive structures in an earbud is a flattened cavity frequency response and improved sound quality.

A method of chemical species suppression for MRI imaging of a scanned object region including acquiring K space data at a first TE, acquiring K space data at a second TE, reconstructing images having off resonance effects, estimating off resonance effects at locations throughout the reconstructed image, and determining the first and second chemical species signals at image locations of the scanned object from the acquired signals and correcting for blurring resulting from off resonance effects due to B0 inhomogeneity.

A spectrally controlled light source includes a light source with a spectral distribution repeated with a predetermined spatial period along an input plane so as to produce multiple copies of the spectral distribution separated by the spatial period. All copies are propagated through dispersive optics to produce equally dispersed spectra on an image plane. A periodic modulating element with a given filter period is applied to each of the dispersed spectra to produce corresponding modulated outputs. According to the invention, the spatial period of the light source on the image plane and the filter period of the modulating element are selected so as to produce a resonance effect that greatly enhances the utility of the spectrally modulated source.

A wideband planar dipole antenna comprises a substrate and two antenna bodies. Metal conductor is printed on the single surface / double surfaces of the substrate to form the antenna bodies. With a dipole antenna architecture, the antenna bodies are manufactured as loop structures similar to concentric circles. The loop structures can be of rectangular or circular shapes. Loops of metal conductors with different lengths resonate to obtain similar but different frequencies. Each path of every antenna body can be finally connected with a metal conductor sheet capable of changing to any shape. Every path can interfere with adjacent paths to achieve the wideband effect. An asymmetric mechanism can be added in one of the antenna bodies. Besides letting the antenna have the resonance effect of the symmetric part, the loop path at the signal source can also be increased to enhance the receiving performance of the antenna.

The invention provides a microwave plasma ignition combustion system of an internal combustion engine. The microwave plasma ignition combustion system comprises a microwave ignition device and a combustion chamber, wherein the microwave ignition device feeds microwave pulse with preset frequency into the combustion chamber; the microwave pulse is used for puncturing and igniting combustible mixed gas in the combustion chamber. The microwave plasma ignition combustion system provided by the invention has the advantages that since the microwave pulse with preset frequency is fed into the combustion chamber, the resonance effect is realized in the combustion chamber, and a strong-current magnetic field is generated, so that the combustible mixed gas in the combustion chamber is punctured and ignited, further the lean burn limit of the engine is expanded, the lean burn capability of the engine is improved and stable lean burning is realized.