25 results about "Resonance effect" patented technology

This document discloses a medical system including a memory (110) storing machine-executable instructions (120) and a trained neural network (122). The trained neural network is configured to output rectified magnetic resonance image data (130) in response to receiving a set of magnetic resonance images (126) as input, each of the magnetic resonance images in the set having a different spatially constant frequency deviation resonance factor. The medical system also includes a computing system (106) configured to control the medical system, wherein the execution of the machine-executable instructions causes the computing system to: receive (200) k-space data (124) acquired according to a magnetic resonance imaging protocol; reconstruct (202) a set of magnetic resonance images (126) according to the magnetic resonance imaging protocol, wherein each of the magnetic resonance images in the set of magnetic resonance images is reconstructed assuming different spatially constant frequency deviation resonance factors selected from a list of frequency deviation resonance factors (128); and receive (204) rectified magnetic resonance image data in response to inputting the set of magnetic resonance images into the trained neural network.

The application relates to the technical field of motion regulation and driving, in particular to a reciprocating motion amplification device and method of a flexible structure of a swing bridge. The reciprocating motion amplification device comprises a loading unit, an excitation execution unit, a self-adaptive identification unit and an energy supply unit. The excitation execution unit and the self-adaptive identification unit are both installed in the loading unit. The self-adaptive identification unit collects vibration response signals of the flexible target structure in real time and identifies the real-time natural frequency, controls the excitation execution unit to adjust the excitation frequency, so that the excitation frequency is automatically matched with the real-time natural frequency, resonance effect is excited, and reciprocating motion amplification is realized. Through closed-loop self-adaptive control, frequency drift is automatically tracked without manual intervention, excitation power consumption is reduced while the significant amplification effect is maintained, and the system adaptability and intelligent level are improved.

The application belongs to the technical field of organic electroluminescence, and relates to a N-containing polycyclic aromatic compound and application. The application provides a N-containing polycyclic aromatic compound, which generates a multiple resonance effect through interaction of each N atom in a N-containing fused ring. The multiple resonance effect can reduce the Stokes shift of the molecule, narrow the emission spectrum, and increase the rate of intersystem crossing inversion, so that a high-efficiency, high-color-purity luminescent material is obtained.

This utility model relates to the technical field of support devices for reducing the resonance effect of frame structure factory buildings. Specifically, it is a support device for reducing the resonance effect of frame structure factory buildings, including a frame body. The frame body has mounting holes inside, and fixing bolts are installed inside the mounting holes. A mounting bracket is installed outside the fixing bolts. A mounting plate is installed at the bottom of the mounting bracket, and a mounting column is installed at the bottom of the mounting plate. A ball groove is opened inside the mounting column, and a rubber ball is placed inside the ball groove. A limiting cylinder is installed at the top of the mounting plate. This support device for reducing the resonance effect of frame structure factory buildings, through the cooperation of the mounting holes, mounting bracket, and fixing bolts, connects the frame body and the mounting plate. The ball groove inside the mounting column serves to hold the rubber ball. The limiting cylinder and the limiting hemisphere cooperate to facilitate the rotation of the spring rod.

The application discloses preparation and application of AuNPs@MBA@HPAM Raman substrate and belongs to the technical field of heavy metal detection. The application is based on the principles of chemical enhancement and heavy metal ion-induced nanoparticle agglomeration, and a functionalized AuNPs@MBA@HPAM Raman substrate with plasmonic resonance effect is prepared. The SERS signal amplification function, the spectral fingerprint characteristics of 4-mercaptobenzoic acid (4-MBA) stability, and the selective chelating ability of the amino-terminated hyperbranched polyamide (HPAM) to Pb² + The preparation process is simple and has good repeatability, and the dual-mode detection of "Raman + ultraviolet" can be realized. The application introduces the displacement excitation difference Raman spectroscopy (SERDS) technology, effectively eliminates the biological matrix and fluorescence interference, and obtains the pure Raman fingerprint signal. The Pb² + In water samples and blood plasma, efficient and selective detection can be realized, and the application prospect is wide.

The application discloses an optical-mechanical gyroscope based on parametric resonance and a working method thereof, and belongs to the technical field of optical inertial sensing. The light source module is used for emitting a coherent light field; the mechanical oscillator is used for generating periodic vibration or displacement on a moving platform; the optical resonant cavity is used for converting the displacement of the mechanical oscillator into an optical signal; the stiffness modulation module is used for applying periodic modulation to the equivalent stiffness of the mechanical oscillator; and the signal detection module is used for detecting the optical signal output by the optical resonant cavity and acquiring a detection signal related to angular velocity. The application applies periodic modulation to the equivalent stiffness of the mechanical oscillator, introduces parametric resonance effect, amplifies the mechanical vibration signal induced by the Coriolis force, and thus improves the signal-to-noise ratio and angular velocity resolution of the optical-mechanical gyroscope.

This invention relates to the field of electronic circuit technology, specifically to a passive network structure for suppressing the influence of inductor self-resonance. The structure includes: a large inductor with a resistor connected in parallel across its terminals and a small inductor connected in series; the resistor is used to dissipate resonant energy, and the small inductor is used to adjust the resonant frequency; the large inductor, resistor, and small inductor are sequentially connected via a connection structure; the connection structure includes a first connection structure and a second connection structure; the first connection structure connects the large inductor and the resistor, and the second connection structure connects the large inductor and the small inductor. This invention features a simple structure, low power consumption, and strong adaptability, making it suitable for high-frequency communication, power supply filtering, and other applications requiring high inductor performance.

The application discloses a kind of petroleum conveying pipeline shock-absorbing pipe support, belong to pipeline conveying technical field, including oil pipeline, fixed frame one, liquid supply tank, fixed frame two and detection ring, the outside wall of oil pipeline is provided with fixed ring, the inside of fixed frame one is provided with the supporting block that is matched with fixed ring, spring is arranged between supporting block and the inside wall of fixed frame one.The application, when low-amplitude buffering, the spring between buffering block and damping rod and fixed ring is realized to the buffering of vibration, and the difference between the sectional area of liquid chamber one and liquid chamber two is captured, amplified and recycled to vibration force, through vibration, the inside of hydraulic tank one is pumped liquid storage, and when the bending section of oil pipeline is impacted to cause amplitude to become larger, the force storage is converted into the reaction thrust in the direction of fixed ring, the resonance effect of oil pipeline is inhibited, different damping stress is provided at different amplitude, the stability of the bending section of oil pipeline is significantly improved when flowing.

The present application relates to the field of musical instrument manufacturing, and discloses a brass resonant type of accordion and an acoustic tuning method thereof. The accordion comprises a body, a row spring assembly and a brass decorative shell, and the brass decorative shell is provided with a brass resonant horn opening at the end. In the row spring assembly, the number of simultaneously sounding bass reed rows in the same sound area is 1, 2 or 3, the number of simultaneously sounding medium reed rows is 1 or 2, and the number of simultaneously sounding high reed rows is 0 or 1. The acoustic tuning method comprises calibrating the resonant frequency of the brass resonant horn, adjusting the vibration fundamental frequency of the row spring reed so that the deviation from the resonant frequency is not more than a preset threshold, and adjusting the vibration fundamental frequency by changing the stiffness or equivalent mass of the reed. The present application significantly improves the fullness of the low-pitched sound part and the overall tone color of the accordion by precisely matching the resonance effect of the brass resonant horn with the frequency of the reed, and solves the problem of the thin low-pitched sound of the traditional accordion.

The utility model discloses a kind of shock-absorbing structure of equipment in steel structure workshop, belong to shock-absorbing equipment technical field, including upper connecting steel sheet, lower connecting steel sheet, the rubber shock-absorbing cylinder connected between the upper connecting steel sheet and the lower connecting steel sheet, skeleton steel sheet is embedded in the rubber shock-absorbing cylinder with interval, weighing element is provided on the upper connecting steel sheet, shock detection element is provided on the rubber shock-absorbing cylinder;The utility model can carry out multiple design to the load-bearing capacity and shock-absorbing capacity of rubber shock-absorbing cylinder, by setting weighing element and shock detection element, once the effect of this rubber shock-absorbing cylinder is found to be bad in use process, the weight information and shock information of machine equipment can be collected, shock-absorbing structure with enough load-bearing capacity and cushioning effect is selected or designed specifically, make the vibration of machine equipment avoid resonance interval or reduce its resonance effect.

This invention discloses an ultra-narrowband optical filter and its design method, belonging to the field of micro-nano optical device technology. It is a reflective all-dielectric guided-mode resonant filter, comprising, from bottom to top, a substrate, a planar waveguide layer, a single-layer one-dimensional subwavelength grating layer, and a single-layer anti-reflection film. The design method includes initial tuning of the resonant wavelength, optimization of the ultra-narrowband bandwidth, fine-tuning of the resonant wavelength, and synergistic optimization of sideband suppression. It clarifies the priority of adjusting each structural parameter, achieving narrowband reflection filtering through the guided-mode resonance effect of the grating and waveguide layer. Through the synergistic design of the single-layer anti-reflection film and the resonant structure, non-resonant broadband background reflection is suppressed without disrupting the ultra-narrowband resonant peak. At the target filtering wavelength of 1064nm, an ultra-narrowband filter with a peak reflectivity of 100% and a full width at half maximum (FWHM) as low as 0.03nm can be achieved, with a sideband suppression ratio exceeding 30dB. This solves the core defect of existing technologies that cannot simultaneously achieve ultra-narrowband filtering and high sideband suppression ratio.

This application relates to the field of electrified railway construction, and in particular to an anti-resonance damping structure for an AF line suspension column. The structure includes a column body, a reference plate at the top of the column body, two first support plates fixedly connected to the upper surface of the reference plate, and a second support plate rotatably connected to each first support plate. A support plate is positioned above the reference plate, and two drive frames are mounted on the lower surface of the support plate. Two first support rods are rotatably connected to both ends of each drive frame. This invention, through the arrangement of the support plate and drive frames, and the cooperative relationship between them, allows the column body to transmit vibrations to the drive frames via the reference plate and first support rods. This causes the drive frames to extend and retract the damping rods, thereby mitigating and absorbing the vibrations experienced by the column body, thus achieving the anti-resonance effect of the support plate and drive frames described in this application.

An earphone diaphragm with a horn waveguide structure comprises a diaphragm body and a ring-shaped waveguide structure arranged in the middle of the upper surface of the diaphragm body; the diaphragm body comprises a center part and a suspension edge part arranged at the outer periphery of the diaphragm center part; the waveguide structure comprises a waveguide part and a fitting part arranged inside the waveguide part; the bottom surface of the fitting part is fitted on the outer surface of the center part; and the waveguide part is arranged in a horn shape gradually extending upwards and to the outside of the upper surface from the bottom. The horn waveguide structure significantly improves the transmission efficiency and clarity of sound, and reduces the distortion of sound. The horn diaphragm provides good resonance effect, makes the sound fuller, and improves the sense of hierarchy and stereoscopic effect. The acoustic performance is optimized, the sound energy conversion efficiency of diaphragm vibration is improved, the practicality is strong, and the horn diaphragm has strong popularization significance.

The scheme belongs to the technical field of optical enhancement, and discloses an FP cavity double-resonance optical structure and a method for enhancing light-matter interaction by using the structure. In the structure, the high binding characteristic of the film layer to specific light and the resonance effect of the open FP cavity work together to selectively constrain the fundamental frequency light and the frequency-doubled light, lay a structural foundation for the realization of double resonance, and further efficiently enhance the light-matter interaction. Compared with the traditional method of using an ultrahigh quality factor cavity (>10 7 ) and single-resonance to enhance light-matter interaction, the optical structure can realize strong light-matter interaction effect due to the double-resonance characteristic, a medium quality factor (>10 4 ), and the light-matter interaction enhancement multiple is more than one order of magnitude higher than that of the single-resonance structure. This greatly reduces the requirements for the preparation of the cavity structure and the film coating process, lays a core foundation for the large-scale production and low-cost application of the optical structure, and is suitable for scenarios that require efficient excitation and enhancement of light-matter interaction.

The utility model discloses an engine anti -resonance backwater pipe structure relates to engine backwater pipe technical field, including no. The utility model discloses an engine anti -resonance backwater pipe structure, through setting up the anti -resonance mechanism, and the damping characteristic of rubber material will through the vibration energy of pipeline effective consumption of friction and internal deformation, and the inhibition amplitude can adapt to different vibration working condition, and finally reach good anti -resonance effect, and simple structure, and the practicality is stronger.

The application relates to a qin placing device, belonging to the qin field, which comprises a box body and a tabletop plate arranged at the upper end of the box body; the box body is provided with a bottom plate, an upper end of which is provided with a sound outlet hole one; a side plate is arranged at the upper end of the bottom plate and surrounds the upper part of the bottom plate to form a resonance area, the side plate is provided with a sound outlet hole two and a sound outlet hole; the tabletop plate is arranged at the upper end of the side plate, the upper surface of the tabletop plate is provided with a sound inlet hole one and a sound inlet hole two at the middle part and one end respectively, and the lower surface of the tabletop plate is provided with a plurality of sound beams in the direction from the sound inlet hole one to the two ends. Beneficial technical effects: the qin placing device is formed by combining the box body and the tabletop plate to form a resonance area, then a plurality of sound beams, sound outlet holes and sound outlet holes are arranged in the resonance area, the sound beams, sound outlet holes and sound outlet holes arranged in specific directions and orientations actively intervene in the sound field in the resonance area, amplify and color the sound of the qin, so that the sound quality is improved, and excellent resonance effect is realized.

This invention discloses a transformer box with shockproof function, belonging to the field of transformer box seismic technology. It includes a support base assembly, a shock-absorbing assembly, a resonance adjustment assembly, and a transformer box body. The shock-absorbing assembly is located at the bottom of the transformer box body and on the support base assembly. The resonance adjustment assembly is located within the shock-absorbing assembly. This invention converts seismic energy into elastic potential energy through the elastic deformation of a spring wheel, achieving dissipation of horizontal displacement. By configuring parallel or series connections to dynamically adjust the equivalent stiffness coefficient, the resonance adjustment assembly can automatically switch between low-frequency and high-frequency operating conditions according to the vibration amplitude, achieving real-time adjustment of the resonance frequency. This effectively suppresses the resonance effect, thereby achieving multi-level energy dissipation and adaptive frequency adjustment, significantly improving the stability and reliability of the transformer box under impact environments such as earthquakes.

The present application belongs to the technical field of engine, and particularly relates to a method and device for enhancing flame acceleration and DDT by pulse jet flow resonance, comprising the following steps: obtaining the combustion chamber eigenfrequency of a combustion chamber; setting the jet flow frequency of the pulse jet flow according to the combustion chamber eigenfrequency, and the ratio of the combustion chamber eigenfrequency to the jet flow frequency being 1 / 1-3 / 2; injecting the pulse jet flow at the jet flow frequency along multiple radial directions of the inlet section of the combustion chamber, the multiple pulse jet flows generating pressure waves at the jet flow frequency, the pressure waves generated at the jet flow frequency forming a resonance effect with the combustion chamber, the pressure waves acting on the flame to accelerate the flame combustion and DDT conversion. Compared with the conventional jet flow injection method for increasing disturbance to accelerate flame combustion, the present application simplifies the structure, forms pressure waves by the pulse jet flow, and increases the pressure wave intensity through the resonance effect, greatly expanding the turbulent flow of the flame, and achieving better acceleration effect.

This invention relates to the field of food processing control technology, and discloses a method for controlling the cooking of bone broth by dynamically matching physical field parameters based on reinforcement learning. The method includes the following steps: A pulse power-off is executed by an electromagnetic heater to create a thermal shock environment within the bone broth fluid medium and induce natural physical rebound. Temperature decay data is collected under zero power conditions. The viscoelastic relaxation time is calculated through nonlinear fitting and inversion. A deep reinforcement learning model performs inference decisions on the viscoelastic relaxation time based on a locking mechanism formula to determine the optimal angular frequency. The electromagnetic heater performs variable frequency heating based on the optimal angular frequency, maintaining the bone broth in a viscoelastic resonance state. The detection cycle is automatically restarted when resonance deviation occurs. This invention achieves indirect measurement of fluid rheological properties and dynamic matching of heating frequency through active thermal excitation and real-time feedback. It utilizes the physical resonance effect to improve energy-mass coupling efficiency and promote emulsification and nutrient extraction.

This invention relates to a novel multi-nested anti-resonant optical fiber for reducing transmission loss in the terahertz band. The fiber structure includes: an air core, four sets of circular arc rectangular tube nested units, two sets of semi-circular arc hollow core nested tubes, and an outer cladding tube. The four sets of circular arc rectangular tube units are symmetrically connected to the inner wall of the outer cladding tube around the air core at an angle; the two sets of semi-circular arc hollow core nested tubes are symmetrically distributed about the x-axis and located between adjacent circular arc rectangular tube nested units. This invention introduces multi-layered nested negative curvature resonant units, utilizing the anti-resonance effect to confine terahertz waves within the air core for transmission. By optimizing the number of layers, size, and rotation angle of the circular arc rectangular tube nested units, as well as the layout of the semi-circular arc hollow core nested tubes, the transmission loss of the optical fiber is effectively reduced and higher-order modes are suppressed. This invention provides a waveguide solution for broadband, low-loss, single-mode transmission in the terahertz band, and has application potential in terahertz communication, imaging, and sensing fields.

This invention relates to a hollow waveguide structure based on the anti-resonance effect and its fabrication method, belonging to the field of waveguide optics, and solves the problems of large size, complex manufacturing process, and high cost of traditional hollow anti-resonant optical fibers. The hollow waveguide structure based on the anti-resonance effect includes: a first cladding layer, a core layer, and a second cladding layer stacked sequentially; wherein the core layer includes an air core and a plurality of capillary walls distributed symmetrically to both sides of the air core, wherein the thickness of the capillary walls is determined based on the anti-resonance condition, which is determined by the wavelength of the transmitted light, the effective refractive index of air, and the effective refractive index of the capillary wall material.

The application belongs to the technical field of SERS detection, and particularly relates to an Ag-CuCo 0.5 Fe 1.5 O4 composite SERS substrate for detecting malachite green in wastewater. CuCo 0.5 Fe 1.5 O4 nanomaterials are synthesized by a calcination method, AgNPs are in-situ loaded on the surface of the CuCo 0.5 Fe 1.5 O4 composite SERS substrate is constructed, and the substrate is fixed on the surface of a glass sheet. The substrate fully combines the local surface plasmon resonance effect of AgNPs and the cation rearrangement and lattice distortion characteristics generated by CuCo 0.5 Fe 1.5 O4, effectively promotes the separation and transmission of photo-generated carriers. The Co / Fe synergistic effect endows the material with rich defect sites and controllable electronic structure, is conducive to forming an efficient interface charge transfer path, thereby significantly enhancing the Raman signal and realizing sensitive detection of trace malachite green in wastewater.

This invention discloses a terahertz autocorrelation near-field imaging spectroscopy system, relating to the interdisciplinary field of micro-nano photonics and terahertz photoelectric detection. The system includes: a terahertz emitter, an optical path adjustment unit, a scattering near-field scanning microscope, a terahertz receiver, a current amplifier, a lock-in amplifier, and a processor. This invention employs autocorrelation near-field imaging spectroscopy, which can obtain the time-domain information of terahertz waves by performing autocorrelation measurements on terahertz pulses. The autocorrelation near-field imaging spectroscopy method in this invention also has the ability to enhance signal intensity and suppress background noise. By controlling the optical path difference and adjusting the optical path, the two signals are accumulated to achieve a modulation of the probe resonance effect, which is beneficial for studying the resonance characteristics of the sample itself.

This utility model relates to the field of power fittings technology. It provides an anti-resonance power fitting bowl-shaped mounting plate, comprising a plate surface, an installation cavity fixedly formed inside the top of the plate surface, and a first installation opening fixedly formed at the upper end of the installation cavity; a protective frame, fixedly installed above the first installation opening, with a second installation opening fixedly formed inside the protective frame, and sliding grooves fixedly formed on both sides inside the protective frame. This solves the problem that existing bowl-shaped mounting plates mainly rely on fastener structures for anti-resonance design to reduce damage to power fittings. However, the original anti-resonance structure of the bowl-shaped mounting plate is relatively simple, resulting in poor anti-resonance effect and affecting the service life of the power fittings. When using springs for anti-resonance, the springs lack an effective stabilizing structure, easily generating unstable movement during operation. This instability not only fails to effectively suppress resonance but may also exacerbate the resonance situation or cause other adverse vibration problems.

1. The name of the design product: medicine stone sheet (noble snake pattern stone). 2. The use of the design product: surface inlaid parts for health mattress, through cooperation with mattress heating system, release specific band far infrared after heating, the far infrared can produce resonance effect with human cells, realize the health function of promoting blood circulation, relieving muscle fatigue and improving sleep quality. The product is arranged regularly and inlaid on the surface of the mattress, which can conform to the human body curve to form uniform warm stimulation and health care effect, and is suitable for health bedding configuration in family, beauty salon and other scenes. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.