59results about How to "Calculation method is fast" patented technology

A sound source model storage section stores a sound source model that represents an audio signal emitted from a sound source in the form of a probability density function. An observation signal, which is obtained by collecting the audio signal, is converted into a plurality of frequency-specific observation signals each corresponding to one of a plurality of frequency bands. Then, a dereverberation filter corresponding to each frequency band is estimated by using the frequency-specific observation signal for the frequency band on the basis of the sound source model and a reverberation model that represents a relationship for each frequency band among the audio signal, the observation signal and the dereverberation filter. A frequency-specific target signal corresponding to each frequency band is determined by applying the dereverberation filter for the frequency band to the frequency-specific observation signal for the frequency band, and the resulting frequency-specific target signals are integrated.

The invention discloses a spaceborne dual-channel angle tracking calibration system and a method. The system comprises an antenna device, a polarization duplexer, a synthesis network, a sum-path receiver, a difference-path receiver, a transmitter, a digital signal processor and a calibration device. Due to the calibration device, the system can realize real-time compensation for an angle error signal within each period, thereby improving the system precision; and meanwhile, the calibration device of the invention has the advantages of simplicity and easy implementation.

The invention discloses a computing method of a revolution section profile of a turbomachinery blade, which mainly comprises the following steps: reading in each section profile data of the blade; taking out a point at the corresponding position on each section profile and recombining the points to form a space curve l; projecting the curve to an XZ plane and a YZ plane to obtain a curve lXZ and a curve lYZ; presetting a function relational expression R=f(X) of the intersecting line of a revolution surface and a meridian plane; presetting an initial radius Rinitial to solve the coordinates of the intersecting point A of a cylindrical revolution surface the axes of which is the X-axis and the radius of which is the initial radius Rinitial and the space curve l; substituting the coordinate AX of the point A at the X-axis into the function relational expression R=f(X) of the intersecting line of the revolution surface and the meridian plane to obtain the magnitude of the radius RA which corresponds to the coordinate AX on the revolution surface; and then judging whether the point A is the intersecting point according to the absolute value of RA-Rinitial. Each solved intersecting point forms the revolution section profile of the blade. The computing method has the advantages of convenience, rapidness, high computing precision and the like.

A method and system for lithography simulation is disclosed. The method and system specify a subject region of a lithography image with a CD marker, specify a threshold intensity over the lithography image, specify a gradient to a threshold value of the threshold intensity, and calculate a sensitivity or ratio of change of an image boundary of the lithography image to lithography process variation.

The invention provides a point location accuracy evaluation method for a gantry drilling machine tool. The method comprises the steps that 1, a theoretical machining point of a tool is constructed, position coordinates NPi=[xi,yi,zi] of the theoretical machining point and a unit cutter-axis vector Vi=[Ii, Ji and Ki]T of a cutter located at the position are obtained; 2, three non-collinear points are selected on a first rotating shaft as mark points, the machine tool is adjusted to the initial state and a laser tracker is used for measuring coordinates of the mark points at the moment; then, an axial equation of the first rotating shaft and an axial equation of a second rotating shaft are obtained, and initial position coordinates TCP0 of a cutter point of the cutter are worked out; 3, the machine tool is started to work, the laser tracker is used for measuring coordinates of the mark points on the first rotating shaft when the cutter moves the theoretical machining points; 4, actual machining position coordinates of the cutter point of the cutter are worked out, and a difference delta Pi between the actual machining position coordinates and the theoretical machining position coordinates of the cuter point and a comprehensive error delta Pi are worked out. The measuring and calculation method is simple and rapid, and the cost is saved.

The invention discloses a powder X-ray diffraction method for measuring cell parameters of a ZSM-23 molecular sieve. The method includes the steps of: 1) performing grinding, sieving, roasting activation and room-temperature constant-moisture treatment to a ZSM-23 molecular sieve sample to obtain a ZSM-23 molecular sieve to-be-tested sample; 2) under the equal operation conditions of a powder X-ray diffraction instrument, respectively pressing the ZSM-23 molecular sieve to-be-tested sample and a NIST mica standard sample into corresponding sample frames in the powder X-ray diffraction instrument, and carrying out sample diffraction peak angle correction measurement and collecting powder X-ray diffraction data; and 3) when the diffraction peak angle is corrected with the NIST mica standard sample, calculating the cell parameters of the ZSM-23 molecular sieve sample according to an orthorhombic system interplanar crystal spacing formula.

A method of providing a display signal, wherein digital data to be displayed has associated with it statistical values determined for pre-determined sized blocks of the digital data, comprising the steps of: determining display scaling parameters; determining from the display scaling parameters the extent to which the statistical values are suitable to use in place of some or all of the digital data when determining which data points of either the digital data and/or statistical values to display; determining the data points to display; reading the digital data and/or statistical values to be displayed; and generating the display signal from the digital data and/or statistical values.

The invention relates to a moon shadow occlusion estimation and satellite autonomous management method based on a visual circle, and belongs to the technical field of spacecraft on-orbit operation autonomous management and diagnosis. The method comprises the steps of: 1, measuring a moon-satellite-sun angle, an apparent radius of the sun seen from a satellite and an apparent radius of the moon seen from the satellite; 2, respectively calculating moon shadow occlusion ratios of the satellite in a moon shadow umbra region, a moon shadow penumbra region and a moon shadow pseudo-umbra region; 3, calculating a storage battery discharge ampere-hour number in the moon shadow period; 4, measuring a storage battery rated capacity CP, subjecting the storage battery discharge ampere-hour number CD and the storage battery rated capacity CP to comparison judgment, according to a judgment result, not taking action, or reducing the satellite discharge capacity. According to the method, the influenceof the moon shadow on satellite energy supply can be quantitatively estimated through a calculation result. The effectiveness and accuracy of the algorithm are verified through actual on-orbit data.

The invention discloses a rapid MSK communication detection demodulation method, and relates to an easy and rapid MSK communication detection and information blind demodulation reduction method. A user judges whether target communication exists or not and completes information demodulation reduction according to analysis of output signals of a monitoring/reconnaissance receiver in the certain radio environment and extraction of key parameters. The method comprises the steps that a non-cooperative receiver searches for and scans a related frequency band, the computation complexity is low, and software and hardware are easy to obtain. Meanwhile, the information blind demodulation reduction method is a non-coherent detection method. According to the rapid MSK communication detection demodulation method, complex operation processing of carrier phase synchronization is avoided by achieving demodulation reduction of unknown information, meanwhile, the requirement for system carrier frequency estimation accuracy is low, a certain error is allowed to exist in carrier frequency estimation, and the requirements that deviation possibly exists in the working frequency in actual communication and the signal to noise ratio received by non-cooperative communication is low are met.

The invention discloses a curve corner and deflection direction determination method and application of a road design curve, and relates to the technical field of road plane alignment design and construction.The curve corner and deflection direction determination method comprises the steps: obtaining the curve type of a target curve and a first straight line and a second straight line which are connected to the two ends of the target curve respectively; randomly taking two points on the first straight line and the second straight line respectively, and calculating the orientation of the first straight line and the orientation of the second straight line; obtaining a minimum rotation angle value of the orientation of the first straight line deflected to the orientation of the second straight line; obtaining a curve corner and a deflection direction of the target curve according to the type of the target curve and the minimum corner value. The invention also discloses an application of the method in engineering surveying by adopting the total station. The calculation method is simple and clear, it is only needed to determine whether the target curve is a common curve or a turn-back curve in the calculation process, and curve corner value calculation and deflection direction do not need any judgment step.

The invention discloses an obtaining method and device for a controlled voltage source ground connection current total compensation output value. The method comprises the steps that detection voltageis output by a controlled voltage source, and the amplitude of the detection voltage is controlled to be constant, and the phase of the detection voltage is changed; the voltage falling number of a target phase before and after the controlled voltage source outputs the detection voltage is calculated; if the voltage falling number is within the threshold value range, the phase difference between the detection voltage and the target phase voltage before the controlled voltage source outputs the detection voltage is calculated; the phase difference is adopted, and the voltage output value for controlled voltage source total compensation during system single phase ground connection is calculated. Under various topology structures of controlled voltage source ground connection current total compensation, the voltage output value of controlled voltage source total compensation during single phase ground connection can be rapidly and accurately obtained, and the controlled voltage source total compensation implementation difficulty is lowered.

The invention provides a calculation method of earthwork quantity and a device for calculating earthwork quantity. The calculation method of earthwork quantity comprises the following steps: Step S1,obtaining engineering survey data of earthwork quantity; Step S2, constructing a surface domain model according to the obtained engineering survey data; Step S3, calculating the earthwork quantity according to the constructed area domain model. According to the earthwork quantity calculation method of the embodiment of the invention, the earthwork quantity can be automatically calculated in batches, and the earthwork quantity calculation method is not only simple, fast, but also high in precision.

The invention discloses a method for determining the uniaxial compressive strength damage of red-layer mudstone after the dry-wet cycle action, which comprises the following steps: acquiring a stress-strain curve of a mudstone sample after the dry-wet cycle action to obtain the uniaxial compressive strength, and performing scanning electron microscope image processing on the mudstone after different dry-wet cycles to obtain the uniaxial compressive strength damage of the red-layer mudstone. Analyzing the porosity of the sample under a specific multiple, calculating a pore expansion coefficient, obtaining a change rule of the pore expansion coefficient along with a dry-wet cycle, and determining the correlation between the uniaxial compressive strength and the pore expansion coefficient based on response characteristics of the uniaxial compressive strength and the pore expansion coefficient; the method can be used for rapidly calculating the uniaxial compressive strength and the damage amount of the mudstone after the dry-wet cycle action.

The invention discloses a method and a device for calculating the availability ratio of a redundancy-incomplete maintainable system. The method comprises the following steps of defining various statesin an automatic control system, wherein all the states comprise an all-normal state, a partial-normal state and an all-fault state; calculating the conversion probability among various states in theautomatic control system according to a pre-acquired failure rate and a pre-acquired maintenance rate; calculating the conversion probability among various states according to a pre-designed algorithm, and obtaining the availability ratio of the redundancy-incomplete maintainable system. According to the invention, the problem that the availability ratio of the redundancy-incomplete maintainable system is difficult to calculate due to the fact that no calculation method for calculating the availability ratio of the redundancy-incomplete maintainable system is available in the prior art can besolved.