742results about How to "Loud noise" patented technology

The invention provides an academic resource recommendation service system and method. The method comprises the following steps: crawling academic resources on an internet by using an LDA (Latent Dirichlet Allocation)-based focused crawler, classifying the academic resources according to preset A types by using an LDA-based text classification model, and storing the academic resources in a local academic resource database, wherein the system further comprises an academic resource model, a resource quality value calculation module and a user interest module; implanting a tracking software module at a user terminal, combining interesting subjects and historical browsing behavior data of the user, respectively modeling the academic resource model and the user interest module by virtue of four dimensions such as the academic resource type, subject theme distribution, key word distribution and LDA latent theme distribution, calculating the similarity between the academic resource model and the user interest preference module, combining the resource quality value to calculate the recommendation degree, and finally perform academic resource Top-N recommendation for the user according to the recommendation degree. According to the method disclosed by the invention, personalized accurate recommendation of the academic resources is performed according to the identity, interest and browsing behaviors of users, and the working efficiency of scientific research personnel is improved.

Provided is an air purifier capable of increased air purification properties due to charged particles being blown out. A first air-blower blasts air, thus drawing air in from the outside to a first air-flow path, and an air-purification unit purifies the air and blows out same. A second air blower blasts air, thus drawing air in from the outside to a second air-flow path, and the air is blown out together with charged particles generated by a charged particle generator. A control unit controls the amount of air blasted by the second air-blower, according to the amount of air blasted by the first air-blower. Alternatively, the control unit controls the angle to be adjusted by the regulator, according to the amount of air blasted by the first air-blower.

An improved rocker-type switch has a toggle member pivotably mounted on a central pivot member in a frame of a top housing part joined to a bottom housing part holding switch contacts in a modular block subassembly. A pair of movable contact arms is actuated by spring-biased actuator members held in the central pivot member. The modular block subassembly has an insulative top block member, a top switch contact plate with switch contacts on upright tabs inserted through slots in the top block member, an insulative bottom block member sandwiching the top switch contact plate, and a bottom switch contact plate having switch contacts on upright tabs inserted through slots in the bottom and top block members, forming a pair of opposing switch contact positions for the movable contact arms. The switch contact plates have clip portions for inserting the tabs of respective switch contact terminal plates therein. For different switch configurations, e.g., single-pole, double-pole, 3-way, or 4-way operation, the switch contact plates are changed, but the same block subassembly and other parts can be used, thereby minimizing change of the surrounding parts, limiting insulative molding costs, eliminating tolerance stack-up, and facilitating assembly through automation.

Noise attributed to signals of a word line, in first and second bit lines which are overlapped with the same word line in memory cells stacked in a three-dimensional manner is reduced in a storage device with a folded bit-line architecture. The storage device includes a driver circuit including a sense amplifier, and first and second memory cell arrays which are stacked each other. The first memory cell array includes a first memory cell electrically connected to the first bit line and a first word line, and the second memory cell array includes a second memory cell electrically connected to the second bit line and a second word line. The first and second bit lines are electrically connected to the sense amplifier in the folded bit-line architecture. The first word line, first bit line, second bit line, and second word line are disposed in this manner over the driver circuit.

The invention discloses an image type fire flame identification method. The method comprises the following steps of 1, image capturing; 2, image processing. The image processing comprises the steps of 201, image preprocessing; 202, fire identifying. The fire identifying comprises the steps that indentifying is conducted by the adoption of a prebuilt binary classification model, the binary classification model is a support vector machine model for classifying the flame situation and the non-flame situation, wherein the building process of the binary classification model comprises the steps of I, image information capturing;II, feature extracting; III, training sample acquiring; IV, binary classification model building; IV-1, kernel function selecting; IV-2, classification function determining, optimizing parameter C and parameter D by the adoption of the conjugate gradient method, converting the optimized parameter C and parameter D into gamma and sigma 2; V, binary classification model training. By means of the image type fire flame identification method, steps are simple, operation is simple and convenient, reliability is high, using effect is good, and the problems that reliability is lower, false or missing alarm rate is higher, using effect is poor and the like in an existing video fire detecting system under a complex environment are solved effectively.

A wired circuit board is provided having enhanced reliability of electrical connection between a metal substrate and a shield layer to achieve significant noise reduction reliably. An insulating base layer is formed on the metal substrate, while resin layers are formed on the metal substrate with a predetermined space provided from the both widthwise sides of the insulating base layer. A conductor layer is formed having a predetermined wired circuit pattern on the insulating base layer. Thereafter, an insulating cover layer is formed on the insulating base layer in such a manner as to cover the conductor layer. Then, a shield layer is laminated on the metal substrate to cover the insulating cover layer and also is put in close contact with the resin layers at end portions thereof by a vacuum film-forming method or by plating.

The invention relates to a multifunctional complex printer. The multifunctional complex printer comprises a lifting device of a paper feed part. The multifunctional complex printer is characterized in that a corona device, a first AC servo tension detection device and a first cooling pull roll device are sequentially arranged at right side of a first deviation correction device, an intaglio printing unit is arranged above the corona device, the first AC servo tension detection device and the first cooling pull roll device, a first interchangeable hectograph unit, a second interchangeable hectograph unit, a third interchangeable hectograph unit, a fourth interchangeable hectograph unit, an interchangeable letterpress printing unit, an interchangeable screen printing unit and a first interchangeable flexography printing unit are sequentially arranged at the right side of the intaglio printing unit, a fourth AC servo tension detection device is arranged below a reserved platform of an inkjet device, and a second two-cylinder die cutting device, a back cutting device and a television monitoring camera are sequentially arranged at the right side of a first two-cylinder die cutting device. The multifunctional complex printer has the advantages of flexibly combining various printing modes according to pluralism of products and optionally exchanging printing modes of various color classes.

Exemplary embodiments of the invention provide a reference harmonic oscillator integrated circuit having three or more terminals, with systems and methods for calibrating the harmonic oscillator to a selected first frequency using a limited number of terminals. An exemplary apparatus comprises: a reference harmonic oscillator, a first terminal to receive a supply voltage, a second terminal to receive a ground potential, a third terminal to provide an output signal having an output frequency, and may also include a fourth terminal. One of the first, second, third or fourth terminals is further adapted for input of a calibration of the first frequency. The exemplary apparatus may enter calibration and testing modes in response to various commands such as a calibration mode signal, and may also be configured through one of the terminals for output frequency selection, spread-spectrum output, and output voltage levels.

An apparatus, system and method are provided for low-latency start-up of a free-running harmonic oscillator. The exemplary apparatus embodiment comprises a first and second current sources to generate first and second currents; a bias current monitor adapted to detect a magnitude of the second current and to provide a control signal when the magnitude of the second current is equal to or greater than a predetermined magnitude; and a bias controller adapted to switch the first current from the oscillator and to switch the second current to the oscillator in response to the control signal. a reference voltage generator, a comparator, and a bias controller. Exemplary embodiments include reference voltage generator, a comparator, and a bias controller.

In various embodiments, the invention provides a discrete clock generator and / or a timing and frequency reference using an LC-oscillator topology, having a frequency controller to control and provide a stable resonant frequency, which may then be provided to other, second circuitry such as a processor or controller. Frequency stability is provided over variations in a selected parameter such as temperature and fabrication process variations. The various apparatus embodiments include a sensor adapted to provide a signal in response to at least one parameter of a plurality of parameters; and a frequency controller adapted to modify the resonant frequency in response to the second signal. In exemplary embodiments, the sensor is implemented as a current source responsive to temperature fluctuations, and the frequency controller is implemented as a plurality of controlled reactance modules which are selectively couplable to the resonator or to one or more control voltages. The controlled reactance modules may include fixed or variable capacitances or inductances, and may be binary weighted. Arrays of resistive modules are also provided, to generate one or more control voltages.

In various embodiments, the invention provides a clock generator and / or a timing and frequency reference using an LC-oscillator topology, having a frequency controller to control and provide a stable resonant frequency, which is integrated with other, second circuitry such as a processor or controller. Frequency stability is provided over variations in a selected parameter such as temperature and fabrication process variations. The various apparatus embodiments include a sensor adapted to provide a signal in response to at least one parameter of a plurality of parameters; and a frequency controller adapted to modify the resonant frequency in response to the second signal. In exemplary embodiments, the sensor is implemented as a current source responsive to temperature fluctuations, and the frequency controller is implemented as a plurality of controlled reactance modules which are selectively couplable to the resonator or to one or more control voltages. The controlled reactance modules may include fixed or variable capacitances or inductances, and may be binary weighted. Arrays of resistive modules are also provided, to generate one or more control voltages.

The invention discloses an image enhancement and partition method, which comprises the following steps of I, image enhancement: a processor and an image enhancement method based on fuzzy logic are adopted for performing enhancement processing on an image needing to be processed, and the process is as follows: i, converting from an image domain to a fuzzy domain: mapping the grey value of each pixel point of the image needing to be processed to a fuzzy membership degree of a fuzzy set according to a membership function (shown in the specifications); ii, performing fuzzy enhancement processing by utilizing a fuzzy enhancement operator in the fuzzy domain; iii, converting from the fuzzy domain to the image domain; II, image partition: partitioning a digital image subjected to enhancement processing, i.e. a to-be-partition image, according to an image partition method based on a three-dimensional fuzzy division maximum entropy. The method is simple in steps, reasonable in design, convenient to realize, good in processing effect and high in practical value, and an image enhancement and partition process can be simply, conveniently and quickly completed with high quality.

The invention relates to a digitized real-time magnetic field compensation device and method on the basis of a super-conducting magnetic sensor. The digitized real-time magnetic field compensation device is characterized by leading in two-stage negative feedback with different passing band characteristics on the basis of a traditional magnetic flux locking ring reading circuit to achieve reading of high-sensitivity to-be-measured magnetic field signals and compensation of low-sensitivity to-be-compensated magnetic field interference, adopting a digital circuit composed of an analog-to-digital converter (ADC), a microprocessor, a digital-to-analog converter (DAC) and accessories thereof to form a magnetic compensation circuit, and adding soft start capable of improving reliability of the magnetic compensation device and a function of automatic direct current offset eliminating of a magnetic flux locking ring. The compensation method is characterized by collecting output signals of the magnetic flux locking ring through the ADC, performing direct current offset elimination, filtering, inversion and integration through the microprocessor and finally outputting signals required by magnetic compensation through the DAC. A SQUID Feedback ring is used for feedback, so that the structure of the magnetic compensation device is greatly simplified, and maintainability, reliability and to-be-compensated signal withdrawing capability of the magnetic compensation device are improved.

Vortex generators are arranged on the edges of aircraft wing control surfaces to generate smaller vortices that weaken the main vortex that would otherwise be generated at these areas, and thereby reduce the aerodynamic generation of noise. Each vortex generator includes plural elongated elements in the form of rigid rods or flexible bristles protruding laterally outwardly from the respective edge of the control surface. The vortex generators are preferably arranged on the inboard and outboard edges of high lift flaps and slats.

A rotary electric apparatus comprises a rotor including a first and second rotor members, a stator including a first stator and second stator members with armature coils to which armature current is supplied for synchronous rotation. The first and second rotor members are formed into a skewed type. Control means for controlling amounts Φ1 and Φ2 of field magnetic flux generated by the first and second rotor members, respectively, such that the amounts Φ1 and Φ2 differ from each other to reduce a difference between a maximum amplitude of a predetermined-order harmonic component F1 of an electromagnetic force caused by a pair of the first rotor member and the first stator member and a maximum amplitude of the predetermined-order harmonic component F2 of an electromagnetic force caused by a further pair of the second rotor member and the second stator member is reduced.

The present invention includes a method for generating an ambiguity-resolved, refraction-corrected, and noise-minimized carrier-phase measurement. The method includes forming a first composite measurement using GPS carrier-phase measurements on the L1, L2 and L5 frequencies. To reduce the noise in the first composite measurement, the method further includes forming a second composite measurement using GPS carrier-phase measurements on at least two of the three GPS carrier frequencies. The second composite measurement is formed to have a small multi-path noise therein so that it can be used to smooth the first composite measurement so that the multipath noise is minimized.

The invention provides an automatic detecting and early warning method for track foreign matter invasion based on the Internet of Things technology. The method comprises the specific implementation step A of setting up a pavement video monitoring system and a vehicle-mounted video monitoring system; the step B of monitoring a road network in real time, transmitting video signals wirelessly and carrying out self-adaptive feedback; the step C of processing cloud data and vehicle-mounted data, detecting foreign matter invasion, recognizing the foreign matter invasion and giving an alarm; the step D of sharing full road network information, controlling driving when the foreign matter invades, and dispatching driving of the related road network.

A surface analysis apparatus and a method for compensating for mechanical vibrations and drifts in a surface analysis instrument are disclosed. A probe that is sensitive to the distance between the probe and a sample surface provides a probe signal. The probe signal contains information about the surface properties and noise due to changes in the probe-surface distance. A sensor measures a displacement between a probe and the sample surface. The sensor is substantially insensitive to the surface properties measured by the probe. The displacement measurement can be used to compensate for the noise in the probe signal.

In multilayer optical discs and high-speed optical discs, the amount of reproduction light per unit time greatly decreases and the reproduction signal quality (S / N) significantly drops due to the low effective reflectivity and the short read time of the medium. These problems are solved by causing reflected signal light from the optical disc and reference light, which is separated from the same light source and introduced into a detector without being shone onto the optical disc, to interference with each other on the detector. Detector outputs having four different interference states are simultaneously obtained, the interference states being displaced at intervals of 90° in terms of the phase relationship between the reference light and the signal. Based on a operation of the four detector outputs, a reproduction signal can be obtained that is stable at all times and amplified with high quality, even when there is an optical path length variation due to disc undulations.

A vehicle window assembly, preferably for the rear of a pickup cab having a sliding glass member, is provided with a window frame molding having an integrated fluid inlet, fluid outlet and circuitous flow channel that doubles back on itself and connects the fluid inlet with the fluid outlet to permit fluid flow through the molding, thereby permitting water that has entered through the sliding glass member to drain from interior compartment to the outside of the vehicle while minimizing the introduction of road and wind noise in the interior compartment.

The automatic window opening and closing system operating on pneumatic technology includes one central control system, a window opening and closing mechanism, a detecting device, a guide mechanism and a limiting mechanism. The central control system as the information treating center controls the window opening and closing mechanism to open or close the window based on the user's setting and the detecting device sent wind and rain signal. The window opening and closing mechanism has solenoid valve to receive the signal from the central control system and a link rod connected to a cylinder to open or close the window. The present invention is simple and practical.

The present disclosure discloses a GPU-based TFT-LCD Mura defect detection method, comprising: (1) establishing a studentized residual based double-second-order regression diagnosis model based original image data to obtain double-second-order regression background data; (2) obtaining influence quantities of respective data points on fitted values according to the original image data and the double-second-order regression background image data; (3) excluding outliers and influential points in the original image data according to the influence quantities to obtain a new pixel point set; (4) establishing a double-N-order polynomial surface fitting model according to the new pixel point set to obtain double-N-order background image data; (5) obtaining a residual image R according to the double-N-order background image data and the original image data, and performing threshold segmentation on the residual image to obtain a threshold segmentation image; and (6) performing morphological processing on the threshold segmentation image to obtain an eroded and dilated image, thereby achieving effective segmentation of Mura defects with uneven brightness distribution.

The invention relates to a photoelectric converter, a detector and scanning equipment. The photoelectric converter comprises a silicon photomultiplier array and a light guide coupled with the silicon photomultiplier array, wherein the silicon photomultiplier array comprises i*j silicon photomultipliers spliced on a horizontal plane, and the i and the j are both integers greater than or equal to 2. The detector comprises a scintillation crystal, an electronic system, a light guide and silicon photomultipliers. The scanning equipment comprises a detection device and a frame, wherein the detection device comprises the detector, and the detector comprises the photoelectric converter. According to the photoelectric converter, the detector and the scanning equipment, a photoelectric conversion scheme of the photoelectric silicon photomultipliers is mainly employed, the silicon photomultipliers have small volumes and are closely arranged, the silicon photomultipliers in proper dimensions and in proper quantity are matched with the light guide in proper shape, a PET detector with high spatial resolution can be established, so the spatial resolution of the whole PET system can be improved, the PET detector having DOI and TOF performances is proper to establish, application to PET / MRI can be realized, and low cost is further realized.

Engine noise of a construction machine is effectively reduced without reducing cooling performance and with an increase in the height of a body cover kept minimum. To achieve the above, an air-intake opening portion (10) and an air discharge opening portion (11) are arranged in a body cover (8) of an upper rotating body (1), and a cooling fan (5) in an engine room covered by the body cover (8) is driven, taking cooling air in from the air-intake opening portion (10) to cool a heat exchanger (7) in the body cover (8) and discharging the air from the air discharge opening portion (11). The air-intake opening portion (10) is laterally offset from a position facing to a ventilation surface of the heat exchanger (7). Alternatively, plural air-intake opening portions are located in a scattered manner such that the plural air-intake opening portions include the offset air-intake opening portion offset from the ventilation surface of the heat exchanger (7).

The invention provides a overload protection device, capable of keeping the rotary drive partition state and preventing from generating the vibration and noise because of the transference the path of the push pressure and accurately setting the operation torque and making a holding mechanism work reliably. the overload protection device has a central flange (110), a hub flange (131) and a push compressed plate for pushing a steel ball (120) to rotate and drive, wherein a holding mechanism (165) for keeping the partition in the over loading comprises a retaining ring (146) mounted at the central flange side of the push pressure plate (140) and a holding ball (145) arranged at the internal circumstance side of the central flange (110).

The invention encompasses improvements in noise attenuation systems for reducing the audible noise level generated during earth boring operations using a hard surfaced rotary drill bit, and in dual bore-cutting elements for performing sequential first and second bore cutting to the design bore-gauge.