194results about How to "Eliminate disturbing effects" patented technology

A preprocessing apparatus and method for a transmitter and a receiver to prevent system performance degradation caused by Inter-Channel Interference (ICI) or inter-symbol interference (ISI) in an OFDM system. In the OFDM system using N carriers having different frequency bands and K carriers of the N carriers designated as redundant carriers, the transmitter renders ICI-causing parts to be zeroes in a data frame, when a cyclic prefix is not longer than a channel impulse response. Therefore, the ICI is prevented. The receiver eliminates the ISI involved in a current frame using an interference estimated from a previous data frame. Therefore, noise spread caused by the use of redundant carriers is prevented and system complexity is remarkably reduced.

A device for setting the torque transmitted by a friction clutch (12), having an actuator chain which comprises an electric motor (45), a step-down gear (42) and a mechanism for converting the rotational movement into a displacement of a pressure plate (29) of the clutch (12), so as to enable the torque which is transmitted to be set precisely and rapidly even given high friction. For this purpose, the electric motor (45) and / or step-down gear (42) is / are affected by friction, the conversion mechanism (31, 32, 35, 36, 40) and / or the friction clutch (12) itself is / are affected by elasticity, and, to set the torque (Md) of the friction clutch (12), a position regulator (47) which is operatively connected to the electric motor (45) and a sensor (46; 46′) which determines the position of one of the links of the actuator chain (45, 42, 41, 40, 36, 35, 32, 31, 29) are provided, the sensor being present at a location upstream of a substantial part of the elasticity in the force-flow direction. The corresponding control and calibrating method is also developed.

The invention provides a cigarette smoke detection method based on video monitoring. The method is divided into a classifier training phase and a cigarette smoke detection phase. In the classifier training phase, geometrical characteristics and Hog characteristics of all prepared positive and negative sample sets are extracted, a support vector machine is used for training the extracted characteristic vectors, and a classifier is generated; and in the cigarette smoke detection phase, firstly, a Gaussian mixture model is utilized to obtain a foreground motion region from a video image obtained by a monitoring camera, then noisy points and cavities are removed by means of morphological filtering, projection histograms in X and Y directions are counted according to the characteristics of cigarette smoke, a precise interested region is obtained, finally characteristics of the interested region are extracted and combined into characteristic vectors, the characteristic vectors are input into the classifier, and whether the interested region has cigarette smoke is judged. The method provided by the invention has the advantages that the interference resistance is high, the detection sensitivity is high, the false alarm rate is low, the cigarette smoke can be recognized in realized, the position of the cigarette smoke is determined, and the cigarette control work of indoor public places is facilitated.

The invention discloses a three-dimensional ecological restoration method for a supereutrophic lake water body. The method comprises the following steps of: inserting a plurality of fixed piles into a hard layer at the bottom of a lake, transversely connecting the tops and middle parts of the fixed piles with steel cables to form an enclosure structure, connecting water-proof canvas serving as enclosure cloth with the fixed piles, and fixing the bottom end of the enclosure cloth and a gabion at the bottom of the lake after sewing to constitute an enclosure; transforming a substrate in the enclosure; partitioning the water surface into multiple layers according to water plants needing to be planted; transplanting the water plants; establishing an ecological floating island; performing biological alga control; and running an ecological enclosure system, maintaining and managing. By adopting the method, the water quality can be improved remarkably, the water transparency is enhanced remarkably, the nutrient salt content is lowered remarkably, and remarkable ecological benefit and landscape effect are achieved.

A method for pairing user terminals in the MU-MIMO system comprises: a base station sets pairing parameters; the base station receives report information of a user terminal, and sets parameter identifiers according to the set pairing parameters and the report information; and after determining that the user terminal which reported the report information is a user terminal to be paired, the base station determines a user terminal paired with the user terminal to be paired according to the set parameter identifiers. A device for pairing user terminals in the MU-MIMO system comprises a parameter setting unit, a parameter identifier setting unit and a pairing performing unit. Under the precondition of considering the path loss condition of the user terminals, the present invention combines with the path condition of the user terminals to pair the user terminals, which can relieve the influences of the interference on the pairing result to a certain extent, and improve the performance of the MU-MIMO system.

The invention relates to a turbulent current target detection method of a wind profiler radar. The method comprises the following steps of inputting a power spectrum of the wind profiler radar; performing pretreatment on the input power spectrum; determining noise level by a segmental averaging method; performing preliminary detection on the power spectrum, wherein the preliminary detection comprises amplitude detection, spectrum width detection and envelope detection; performing classification detection on the power spectrum, wherein the classification detection comprises exploratory excision of a spectral line, classification judgment according to the excision result and spectral peak separation according to categories; performing speed correction on a turbulent current target power spectrum; performing continuous modification on the turbulent current target power spectrum; and performing spectral moment calculation and outputting a result. According to the method disclosed by the invention, the target detection quality of the wind profiler radar can be improved.

A method for checking a vibration damper of a motor vehicle in the installed state includes setting start values of the damping constant kA, the spring rate cA, and the body mass mA for a wheel of a motor vehicle; inducing a vertical vibration of the motor vehicle with the aid of a defined excitation sRreal; determining the theoretical body vibration excursion sAmodel; optically detecting the positions of the wheel and the body shell of the motor vehicle at a plurality of detection instants during the vibration; minimizing the error function formed from the deviations between the theoretical body vibration excursion sAmodel and the observed body vibration excursion sAreal at the detection instants, and determining the damping constant kA, the spring rate cA, and the body mass mA therefrom; and determining the damping measure θ of the vibration damper.

A cosite interference cancellation system is provided for improved rejection of a signal coupled from a transmission antenna into a local receive antenna in the presence of local multipath. The cosite interference cancellation system and associated method advantageously provide improved signal rejection by continuously controlling (adjusting) a matching time delay to reduce cosite interference.

In a vibrating microtome (1), a knife (6) is caused to vibrate during a sectioning operation in a direction parallel to a section plane and substantially parallel to the knife's edge, during which a transverse offset can occur as a consequence of a potentially present inclination of the cutting edge with respect to the section plane. A measuring device (3) for measuring the transverse offset comprises a light barrier (9) into which the cutting edge is placeable so as to partially cover the light of the light barrier. The vibrating microtome (1) generates, from the motion of the knife, a control application signal (pklo, pkhi) that describes the time course of the vibration of the knife (6), and the electronic measurement system of the measuring device (3) measures the coverage of the light barrier as a consequence of the vibration of the knife as an oscillating signal (tpm), and determines the transverse offset from the signal values at points in time that are defined by the control application signal.

The invention relates to a positioning method and a positioning system for a long-distance pipeline defect. In the method for locating defects of long-distance pipelines according to the present invention, a series of butt girth welds are formed in the long-distance pipelines during installation, and wheel-type odometers are used for mileage measurement and positioning in long-distance pipelines. When the wheel-type mileage While the meter is advancing and measuring the mileage in the long-distance pipeline, the eddy current testing device is used to detect when the butt girth weld has passed. This information is analyzed simultaneously with the mileage data of the wheel odometer to determine the pipeline defect s position. The long-distance pipeline defect location system of the present invention includes a wheel odometer and an eddy current detection device; the eddy current detection device includes an eddy current coil and an eddy current detection processing module connected with the eddy current coil. The positioning method and system of the invention can avoid the increase of the accumulative distance error of the wheel odometer, improve the positioning accuracy, and fully meet the positioning requirements.

A magnetic suspension energy-storage flywheel system being a energy-storage device for spacecrafts mainly consists of an axial mixed magnetic bearing, a protection bearing, a radial / axial integrated displacement transducer, a rotor of high-strength composite material, a motor / generator, a radial mixed magnetic bearing, a casing, a mounting shaft and a lock nut. The motor / generator and the mounting shaft is in the middle of the flywheel, and outward are the radial mixed magnetic bearing, the radial / axial integrated displacement transducer, the protection bearing, the axial mixed magnetic bearing and the lock nut in order. The rotor of the high-strength composite material lies outside of the radial mixed magnetic bearing. The integral system is sealed in the casing.

A control system for controlling a belt-type continuously variable transmission having a pulley capable of varying its groove width to which a belt is applied, in which the pulley is provided with an oil chamber to which the oil pressure is fed so that the pulley clamps the belt, in which the capacity of the oil chamber is varied in accordance with a change in the groove width, and in which the oil pressure in the oil chamber is controlled in accordance with a deviation between a target oil pressure and an actual oil pressure, comprising: a pressure-receiving capacity change detecting device for detecting a change in the capacity of the oil chamber; and an oil pressure control contents altering device for altering a degree to reflect the deviation on the oil pressure control of the oil chamber on the basis of a change in the capacity.

Provided is a smoke detecting apparatus capable of detecting occurrence of smoke at high sensitivity while suppressing an effect of disturbance. The smoke detecting apparatus for detecting occurrence of smoke by subjecting an image captured by a monitoring camera to image processing includes: an image memory (10) for storing a plurality of images captured by the monitoring camera in a time series; and a smoke detection area selecting portion (20) for calculating a luminance histogram of the same pixel for each predetermined pixel a plurality of times in a past predetermined period based on the plurality of images stored in the image memory (10), detecting presence or absence of a luminance value that has been newly generated due to occurrence of one of an intrusive object and smoke based on the luminance histogram, and identifying candidate regions to be subjected to the image processing.

A reliable and secure activation of an access based on a detection of movement in a remote access system by providing a secure method for opening / closing of an access in hands-free access mode. The detection of movement relates to the displacement of a lower member of a user by a remote access system, this access system including at least two elements of detection which each emit a signal whose variations (31, 33, 35) are analyzed. The detection of a movement of a lower member is validated by the application of a double verification step according to parameters (dAsA, dAsB) of a criterion for identification (tA, tB; dAsA, dAsB) of a form of variation (F2; A, B) of each signal (31, 33, 35) with a model form of the movement, and according to a criterion for simultaneity of detection of the forms of variation (F2) identified on the two signals.

The present invention recognises and eliminates from a biomagnetic measurement signal interferences whose source is disposed in the direct vicinity of an object being measured. The invention utilises the SSS method that can be used to separate from one another the signals associated with the internal and external sources of a set of measurement sensors by calculating two series developments. The sources to be examined in the invention and disposed in the so-called intermediate space produce a component to both of the developments, and can, therefore, be detected by means of an analysis to be performed in a time domain. This division into components can be made using the Principal Component Analysis (PCA), the Independent Component Analysis (ICA) or the Singular Value Decomposition. Finally, the clarified interferences in the intermediate space can be eliminated from the measured signal using, for example, the linear algebraic orthogonal projection.

The invention relates to a differential mechanism sub-assembly for a vehicle driving axle assembly, bolts in a main reducing gear assembly, and a fastening device of a nut type fastener. In order to finish the automatic tightening operations on the differential mechanism sub-assembly, the bolts in the main reducing gear assembly and a nut, the invention provides a universal fastener automatic control tightening device used in the assembling process of the driving axle assembly. The tightening device comprises a horizontal rotary operating board which is driven to ascend and descend by a lifting mechanism and is provided with a servo tightening mechanism, a tightening operating head, and a counter torque balance positioning head which keeps certain adjustable center distance with the servo tightening mechanism; and a driver of the servo tightening mechanism is connected with a communication interface of an electronic control unit. The technical proposal eliminates personal factors and the disturbing influence under the action of the counter torque in the assembly process to the utmost extent so as to ensure that the product technical requirement is used as a standard to improve the operation quality for the assembling production of the driving axle assembly and improve the operational efficiency.

The invention belongs to the field of immuno-chromatographic detection, and in particular relates to a quantitative detection and computation method based on the fluorescence immuno-chromatographic technology, comprising the following steps: inserting a fluorescence immunostrip dripped with a sample solution to be detected into a fluorescence immunoassay instrument, and sequentially performing irradiation with an LED light source, optical filtering processing with an optical filter, detection with a photoelectric detector, electrical signal processing, AD conversion processing, baseline correction, L-M algorithm processing, area computation and concentration computation. The quantitative detection and computation method stresses on signal reconstruction by using an algorithm, eliminates influence of noise and various interferences, ensures the signal processing course undistorted, and can obtain high-precision and low-error results, thereby quickly, conveniently and accurately determining the concentration result.

The present invention recognises and eliminates from a biomagnetic measurement signal interferences whose source is disposed in the direct vicinity of an object being measured. The invention utilises the SSS method that can be used to separate from one another the signals associated with the internal and external sources of a set of measurement sensors by calculating two series developments. The sources to be examined in the invention and disposed in the so-called intermediate space produce a component to both of the developments, and can, therefore, be detected by means of an analysis to be performed in a time domain. This division into components can be made using the Principal Component Analysis (PCA), the Independent Component Analysis (ICA) or the Singular Value Decomposition. Finally, the clarified interferences in the intermediate space can be eliminated from the measured signal using, for example, the linear algebraic orthogonal projection.

The invention provides a hybrid design method for a radio frequency coil, belonging to the technical field of magnetic resonance imaging, and comprising the following steps of: (1) establishing a three-dimensional human model in an FDTD (Finite Difference Time Domain); (2) presenting a target field in an internal target tissue region of a human load according to the magnetic field distribution requirement; (3) from the target field, performing a back calculation in consideration of the human load to obtain an electromagnetic field distribution; (4) based on the electromagnetic field distribution obtained in Step (3), re-establishing a target field defined in an inverse method; and (5) obtaining the current density on the surface of the coil according to the new target field. The method introduces the equivalence principle into a human model load for analysis design, considers the interaction relationship between the human load and the coil and effectively eliminates the interference influence, so that the coil is designed more precisely.

A method for sensor operating-state determination of a valve arrangement to control a process medium flow through a pipeline having a valve element, arranged such that it can move axially within a valve housing via a pneumatic actuating drive by application of control pressure, with the control pressure being measured and evaluated in order to determine the sliding friction during the movement. The valve element can be moved at a constant speed over at least a subarea of the travel movement, the value of which speed is measured via a position sensor system for signal processing, with the currently applied control pressure being measured at approximately the same time for signal processing via a pressure sensor system. The current sliding friction of the valve element can be determined as a measure of wear state from both measured values, by an electronic evaluation unit, based on a proportional drive force expressed by the control pressure which occurs when the valve element is traveling at a constant speed.

The invention discloses an algae bloom prediction method based on principal component analysis and a BP neural network, and belongs to the technical field of water environment management. The method comprises the steps of monitoring data randomness preprocessing; carrying out influence factor analysis based on a principal component analysis method; and constructing a prediction model by taking thechlorophyll a content and the chlorophyll a content change rate of the water body as output parameters and analyzing the prediction precision. The method is characterized in that an integral derivation data smoothing method is adopted, so that the influence of data randomness is eliminated; based on a principal component analysis method, prediction model input factors are simplified, chlorophylla content change rate is taken as an output parameter, and the defect that chlorophyll a content fluctuation interferes with a prediction result is eliminated, so that the prediction precision of thealgae bloom is effectively improved.

The invention discloses an aluminum alloy multilayer composite plate bolt hole crack defect in-service electromagnetic detection device, which comprises a sensor frame, a steel ring, a detecting coil, a coil winding frame, a sensor head cover, and a sensor output end interface. The device provided in the invention adopts a ferromagnetic metal shielding ring method, and effectively shields and eliminates the interference of a bolt hexagon head. The detection effect is good, and the speed is fast. If double or more detecting coils are designed, the efficiency can be further improved. The device does not have high experience requirements on the detection staff. And most importantly, without the influence of an interference signal, the device can well display a defect signal and give an alarm, thus really avoiding omission detection.

The present invention relates to a method for determining a deviation from zero (Hx0, Hy0) of an electronic compass, comprising the steps of determining first magnetic field strengths in a first coordinate system of the electronic compass by means of a three-axis magnetic sensor; calculating inclination-compensated second magnetic field strengths (200) in a second coordinate system (x, y) which is parallel to the surface of the Earth based on the first magnetic field strengths for adjusting an approach function (210) to the inclination-compensated second magnetic field strengths (200); and determining a deviation from zero (Hx0, Hy0) from the adjusted approach function (210). A method for operating the electronic compass comprises steps for calculating an inclination-compensated magnetic field strength (Hx, Hy) in the second coordinate system (x, y) based on a first magnetic field strength measured by the magnetic sensor, for calculating a zero-point corrected third magnetic field strength (Bx, By) by subtracting the deviation from zero (Hx0, Hy0), determined by the aforementioned method, from the inclination-compensated second magnetic field strength (Hx, Hy), and for calculating an azimuth angle by which an axis (x) of the second coordinate system (x, y) deviates in relation to a north-south direction.

The present invention discloses a fault type matching method based on fault feature variable selection. The objective of the invention is to solve the problem that fault feature variable selection isimplemented for each fault type in a historical database on the premise of the limited data amount of each fault training samples, and the feature variables are employed to implement the fault type matching. Especially, the method comprises the steps of: employing neighbor compositions for analysis to find out each fault type available data one by one to compare feature variables with abnormal changes between normal working condition data; employing the fault feature variables to implement the similarity calculation between window matrixes; and finally, distinguishing the fault types accordingto the maximum similarity. The method employs the feature variables of each fault to implement fault type matching to eliminate the interference influence of non-feature variables and directly reducethe variable dimensions so as to allow the problem of the limited sample amount not to be remarkable. Therefore, the method is an optimal fault diagnosis method.

The invention discloses a visible light communication receiving method based on a neural network. The method comprises the following steps: 1, a first programmable gate array converts a video signal sent by a signal source into a digital signal; 2, the digital signal drives an LED lamp to emit a light signal via an LED driving circuit; 3, the light signal goes into a receiving subsystem via n photoelectric detectors; 4, the n data streams are transmitted to a trained neuron combination module; and 5, the neuron combination module performs balancing processing on the n data streams and outputs a combined data stream that is demodulated and converted into a video signal by a second programmable gate array. The invention also discloses a visible light communication receiving system for realizing the visible light communication receiving method based on the neural network; the system comprises a transmission subsystem, a transmission subsystem and the receiving subsystem. The visible light communication receiving method has the advantages of favorable application prospect and the like.

A clarifier is provided with an improved inlet structure which receives influent from influent column ports and discharges the influent uniformly around the entire circumference of the inlet structure. The influent column ports may be baffled. Angled guide vanes on the inlet structure reduce the flow energy and effect a tangential flow into a feedwell in the basin. The feedwell may be conical to further reduce the velocities and create an outward flow to counteract inward flows in the basin.

The invention provides a comprehensive energy system tie line power control method, which comprises the following steps of: (1) establishing a comprehensive energy optimization scheduling model for dynamically coupling energy supply and production, and calculating to obtain a day-ahead energy production optimization plan and a tie line power plan reference value; (2) based on the real-time power balance equation of each energy subsystem in the comprehensive energy system, constructing a state space model of the comprehensive energy system participating in tie line power control; (3) equivalently converting the state space model of the tie line power control into a quadratic programming model, solving the model by adopting a sequential quadratic programming algorithm, and obtaining adjustable equipment power adjustment quantities of the current time period to the last T control time periods; and (4) issuing the power regulation quantity of the current time period to the first time period after the current time period, and sampling the real-time state of the comprehensive energy system for feedback correction. According to the invention, the tie line power of the integrated energy system is accurately controlled in a complex time-varying environment, and the tie line power of the integrated energy system is ensured to meet the examination of superior power grid departments.

The invention discloses a magnetic suspension control moment gyro device. The magnetic suspension control moment gyro device is formed by a flywheel system and a frame system. The flywheel system is formed by fly hammers, radial magnetic suspension bearings, radial position sensors, axial driven magnetic suspension bearings, motors, a protective bearing, a sealing shell, an axle seat and the like. The protective bearing is located in the middle of a flywheel, the sealing shell and the axel seat are located on the two sides of the flywheel, and the fly hammers, the radial magnetic suspension bearings, the radial position sensors, the axial driven magnetic suspension bearings and the motors are sequentially arranged on the upper side and the lower side of the protective bearing from inside to outside. The frame system is formed by a support, a rotary disc, a torque motor, a bearing, a sleeve, a lock nut, a conductive slip ring, a photoelectric encoder, an end cap and a base. In the frame system, the support is connected with the axel seat and the rotary disc, the conductive slip ring is located in the middle of the rotary disc, and the sleeve, the bearing, the locking nut, the photoelectric encoder and the end cap are outwards located on the rotary disc. According to the magnetic suspension control moment gyro device, the axial driven magnetic suspension bearings and the photoelectric encoder are adopted, the size, the weight and vibration are reduced, control precision is improved, and the response speed is increased.

A combustion diagnosis device for a diesel engine having a plurality of cylinders, including an engine speed sensor for detecting a rotational speed of each cylinder, an injection correction amount calculation unit for calculating an amount of correction for fuel injection of each cylinder in accordance with the engine speed sensor, a rotational fluctuation calculation unit for calculating a rotational fluctuation of each cylinder in accordance with the engine speed sensor, and a combustion state determination unit for determining a combustion state of a determination-target cylinder in accordance with the rotational fluctuation when the correction amount calculated by the injection correction amount calculation unit reaches an upper limit threshold value.