44results about How to "Not easy to noise" patented technology

The present invention is drawn generally to footwear, and more specifically, to footwear having reduced noise and impact characteristics. According to the invention noise generated by the impact of the footfall when in contact with hard floors is reduced by an outer sole with certain hardness and a sound reducing insole which comprising a material of high indentation forced deflection (IFD) weight having a minimum thickness of ¼ to a maximum ¾ inch, and an optimal thickness of about ½ inch. Also, the footwear comprises an upper portion attached to the outer sole to provide comfort and foot protection.

A bow, preferably a crossbow, is provided herein. The bow is provided with a recoil energy dissipation system. When applied to a crossbow, the crossbow comprises a stock member including a barrel at a forward portion thereof, the barrel being configured for supporting an arrow for firing of the crossbow. A riser block assembly is provided at a forward end of the barrel, the riser block assembly supporting first and second bow limbs extending outwardly, the first and second bow limbs carrying a bowstring between the outward tips thereof, and extending transversely to the barrel. The stock member further has a trigger mechanism associated therewith selectively to hold and release the bowstring from a cocked position in which the bowstring is drawn in a direction away from the first and second bow limbs to tension the bow limbs. The recoil energy dissipation mechanism includes an associated flexible attachment arm which is secured at one end to the riser block assembly and which extends from the riser block assembly to each bow limb, and an energy-absorbing member which is secured to each flexible arm and is in contact with an associated bow limb, thereby to reduce vibrations and noise without sacrificing significant projectile velocity.

An infrared sensor IC and an infrared sensor, which are extremely small and are not easily affected by electromagnetic noise and thermal fluctuation, and a manufacturing method thereof are provided. A compound semiconductor that has a small device resistance and a large electron mobility is used for a sensor (2), and then, the compound semiconductor sensor (2) and an integrated circuit (3), which processes an electrical signal output by the compound semiconductor sensor (2) and performs an operation, are arranged in a single package using hybrid formation. In this manner, an infrared sensor IC that can be operated at room temperature can be provided by a microminiature and simple package that is not conventionally produced.

An object of the present invention is to provide an inverter circuit in which soft start can be implemented by a simple circuit added thereto. In high-frequency heating apparatus for driving a magnetron, a DC power supply is chopped by two semiconductor switching devices, and this is output as an AC current through a resonance circuit. The high-frequency heating apparatus includes a dead time generation circuit for turning off the semiconductor switching devices concurrently. In the high-frequency heating apparatus, a drive unit for driving the aforementioned semiconductor switching devices has a function of limiting the lowest frequency of a frequency with which the semiconductor switching devices are driven. The aforementioned lowest frequency is set to be high at the beginning of operation of the high-frequency heating apparatus, and the aforementioned lowest frequency is set to be lower gradually thereafter.

A precise, consistent, reliable, and high resolution magnetism metric controller applied in electronic and information devices is comprised of a scrolling wheel mechanism to drive by rotation a permanent magnet to retrieve signals of changed magnetic field due to displacement of magnetic poles of the permanent magnet.

The invention relates to a method and an apparatus for ripple and phase loss detection. Methods and apparatus are presented for detecting phase loss and/or excessive ripple in a power converter, wherein bandpass filters are used to obtain harmonic voltage amplitudes associated with the power converter DC bus, and phase loss is detected if a ratio of the second harmonic to the sixth harmonic and/or a ratio of the fourth harmonic to the sixth harmonic exceed predetermined threshold values.

The invention discloses a low-voltage power distribution system series fault arc identification method based on all-phase deep learning. In an existing low-voltage power distribution network fault, the identification method for a series fault arc is easily disturbed by a noise and spectrum leakage, an identification effect is affected, identification efficiency is not high, and stability is not high either. In the invention, the above problems are solved. The method comprises the following steps of under a low-voltage alternating current system, carrying out current signal collection on different loads in a low-voltage loop; carrying out all-phase discrete Fourier transform on a collected current signal, carrying out full-phase spectrum characteristic quantity extraction of a load, and constructing an all-phase spectrum characteristic vector; constructing a deep learning neural network model based on Logistic regression, carrying out deep learning training on all-phase spectrum characteristic quantity under the different loads and different operating states till that the model converges; and using the trained model to complete screening of different load types and identification ofwhether the series fault arc occurs.

The invention discloses design of the wideband single, dual or three channel signal detector with ability to suppress interference and crosstalk from two PLL LO signal generators (101&102) with selection of best pairs of LO frequencies (108&109) out of all possible pairs in the way that all interference is kept out-of-band and with efficient filtering in IF (103) and baseband (104) to achieve high sensitivity for wideband channels without requirement for heavy shielding or adding of absorptive materials to the receiver subsystems. Method for measurement and creating array with frequency pairs to control PLL generators with optimal frequency distribution on each PLL generator for uniform and fastest possible scanning of all required bands is also disclosed.

In addition to signal analyzer (801) design and implementation method for digital signal processing for purpose of detection of speed measurement radars is disclosed with advanced AI (808) supported system for classification of the detected signals. Classifier AI module is implemented with SVM (Supported Vector Machine) (913) pretrained and periodically retrained for signal classification in the operation of the detector, and with additional neural network (910) used for assisting in classification of to SVM (913) unknown signals that could be detected during the operation of the detector and to update dynamical signature database (911) used for periodical retraining of the SVM (913) classifier. Optional user interface is possible for manual classification of detected signals and to update dynamical database (911) with new signatures with high weight for retraining.

A liquid discharge head includes a heat generating element which generates heat energy used to discharge a liquid; a temperature detecting element which changes in output voltage in response to a change in the temperature of the heat generating element; an electrical power source line and a grounding line electrically connected to each other through the heat generating element to apply a current to the heat generating element; and a pair of lines for temperature detection electrically connected to each other through the temperature detecting element to apply a current to the temperature detecting element. Here, each of the pair of lines for temperature detection is arranged adjacent to the other.

A lever actuated roll-up shade assembly for motor vehicle windows having a stop brake for slowing down movement of actuating levers of the roll-up shade assembly during movement into a position corresponding to the retracted position of the roller shade so as to prevent loud impact noises.

The invention relates to a method and a system for realizing high-resolution analog-to-digital conversion by a low-resolution ADC (Analog to Digital Converter), which aim at a CCD (Charge-coupled Device) camera. The method comprises the following steps: carrying out subsequent preprocessing on a CCD analog signal generated by an FPA (Focusing Plane Assembly); amplifying a CCD analog video signal after the preprocessing to obtain an amplified video signal; carrying out analog-to-digital conversion on the amplified video signal to obtain a low-bit ADC quantization result; and converting the low-bit quantization result into high-bit quantization result. The invention provides the method and the system for realizing high-resolution analog-to-digital conversion by the low-resolution ADC, whichaim to the CCD camera, and have small delay, high transmission ratio, strong anti-interference capability, high SNR (Signal to Noise Ratio) and wide application range.

The invention discloses a high-impact environment-friendly V belt and a manufacturing process thereof. A manufacturing raw material of the high-impact environment-friendly V belt is composed of canvas, raw glue, wrapping cloth, chemical raw materials, wire ropes, primer, cushioning glue and cloth glue. Aramid fiber framework wire ropes imported from Japan are adopted, during work running, instantlarge power can be borne, the rotating power is five times that of a common V belt, the strength is three times that of a common V belt, in the running process, extension and shrinkage are avoided, the belt is suitable for multi-wheel rotation, meanwhile, during pressing wheel engagement and disengagement, noise is not prone to happening, during running work, when the belt collides with foreign matter and stops working, the belt has the beneficial effects that the friction coefficient is reduced, impact force borne by the belt is reduced, the phenomenon that a motor is burnt out, and the beltis broken is avoided, during running work, glue powder is not prone to appearing in the work face, and the ground environment is protected.

The invention relates to a chain-type pin wheel transmission device which comprises a chain-type pin wheel, a gear (1) and a guide device (4). The chain-type pin wheel is formed by at least 10 pin wheel units; the pin wheel units are sequentially connected in series; the pin wheel units which are connected in series and hinged are arranged along the guide device (4) to form the chain-type pin wheel; drive pins (201) which are fixed on the pin wheel units and are used for being meshed with the gear (1) are also particularly arranged in the chain-type pin wheel; the distances between each two drive pins (201) in the chai-type pin wheel are equal; and a multi-section movement pin tooth transmission structure is formed between the gear (1) and the chain-type pin wheel by the drive pins (201). According to the invention, a fixed mode that the pin wheel needs to move according to a round path is broken through, so that in the pin tooth driving process, the pin wheel can operate according to an oval path or a sealed or unsealed path formed by sequentially and smoothly connecting any one of combinations of curves and straight lines and a combination of curves. The chain-type pin wheel transmission device has foreseeable huge economic value and social value.

The invention discloses a self-adaptive reversible information hiding method based on integer wavelet transform, and belongs to the field of digital watermarking and information hiding. The self-adaptive reversible information hiding method comprises the following steps: firstly, dividing a carrier image into two areas, namely a watermark embedding area and an additional information embedding area; performing integer wavelet transform on the watermark embedding area, and adaptively setting a threshold by utilizing the watermark size and the mean square error of a wavelet coefficient; and determining whether a certain image block is embedded or not according to the approximate component, and then embedding the watermark information into the corresponding diagonal component, wherein the additional information embedding area is used for embedding additional information including a threshold value and the length and width of the watermark. According to the self-adaptive reversible information hiding method, self-adaptive watermark embedding can be realized, and complete blind extraction can be realized; and reversible information hiding can be achieved, and the visual effect is good, and the distortion degree is small, and the PSNR of the image embedded with the watermark is high, and the invisibility of the watermark is good, and the practical value is achieved.

The invention relates to a ceramic automobile brake block, which is characterized by comprising the following compositions in weight portion: 4 to 5 portions of nitrile rubber powder, 2 to 3.5 portions of friction-type mix, 12 to 16 portions of ceramic fibers, 55 to 61 portions of fine barium sulfate, 7 to 8 portions of resin, 7 to 9 portions of crystalline flake graphite, 2 to 4 portions of red copper powder and 1 to 2 portions of paper fibers. Therefore, the ceramic automobile brake block can improve the traveling safety, has long service life, reduces the pollution and the noise, is difficult to be rusty, and is particularly suitable for being used by an automobile.

Provided is a packing material for liquid chromatography, including a gel obtained by polymerizing monomers including 40% by mass or more of a crosslinkable monomer having a (meth)acryloyloxy group.

The invention discloses design of the wideband single, dual or three channel signal detector with ability to suppress interference and crosstalk from two PLL LO signal generators (101&102) with selection of best pairs of LO frequencies (108&109) out of all possible pairs in the way that all interference is kept out-of-band and with efficient filtering in IF (103) and baseband (104) to achieve high sensitivity for wideband channels without requirement for heavy shielding or adding of absorptive materials to the receiver subsystems. Method for measurement and creating array with frequency pairs to control PLL generators with optimal frequency distribution on each PLL generator for uniform and fastest possible scanning of all required bands is also disclosed.

In addition to signal analyzer (801) design and implementation method for digital signal processing for purpose of detection of speed measurement radars is disclosed with advanced AI (808) supported system for classification of the detected signals. Classifier AI module is implemented with SVM (Supported Vector Machine) (913) pretrained and periodically retrained for signal classification in the operation of the detector, and with additional neural network (910) used for assisting in classification of to SVM (913) unknown signals that could be detected during the operation of the detector and to update dynamical signature database (911) used for periodical retraining of the SVM (913) classifier. Optional user interface is possible for manual classification of detected signals and to update dynamical database (911) with new signatures with high weight for retraining.