45 results about "Beat Number" patented technology

The invention, which belongs to the field of radar technology, discloses an actual-value ESPRIT non-circular signal angle estimation method for a single-base MIMO radar. Matched filtering is carried out on array element receiving data and a transmitted signal to obtain an observation data vector; dimensionality reduction preprocessing is carried out on the observation data to obtain a low-dimensional space receiving data vector; on the basis of a non-circular characteristic of the signal and an Euler formula, an actual-value receiving data vector with array aperture doubling is constructed; arotation invariance relationship of a virtual array with aperture extending is constructed; a covariance matrix of the extended receiving data is calculated and feature value decomposition is carriedout on the matrix, an actual-value signal sub space is estimated; new actual-value signal sub space is defined and a rotation invariance equation of the new actual-value signal sub space is calculated; and a DOA estimation value of the target is calculated. Therefore, the DOA estimation accuracy is improved obviously and the computational complexity of the ESPRIT algorithm is reduced substantially. The estimation method is suitable for the low-signal-to-noise-ratio and low-fast-beat-number occasions.

The invention discloses a variable spraying method for a plane polygon. According to the variable spraying method for the plane polygon, geometric analysis is carried out on an irregular polygon, theirregular polygon is divided into the combination of a triangle and n trapezoids or the combination of n trapezoids, a quantitative spraying area and a variable spraying area are planned, and an optimal spraying track is generated; a quantitative spraying method is adopted for most of the trapezoid regions, a trapezoid scroll number required by variable spraying is obtained according to the widthof the triangle, and the triangular part is digested by adopting the variable spraying method; and the diameter of the spraying pattern is calculated in real time in the variable spraying process, andthe electrostatic voltage of a spinning cup, the rotating speed of the spinning cup, the distance between the spinning cup and the workpiece, the moving speed of the spinning cup and other variable spraying parameters are reversely pushed out through the diameter of the spraying pattern and the expected beat number. According to the variable spraying method for the plane polygon, the trajectory planning time of early-stage spraying can be shortened, the trajectory planning problem of the complex polygon can be simplified, thus the waste of the coating can be reduced, and the economic benefitis improved; and meanwhile, the discharge amount of the paint to the spraying room can be reduced, and the pollution degree of the workshop can be reduced.

The invention provides a moving magnetic steel gas-magnetism combined air-suspension double-workpiece-stage vector circular-arc exchange method and device based on double-layer water cooling and belongs to a semiconductor manufacturing equipment technology. The device comprises a supporting frame, a balance mass block, gas-magnetism combined air-suspension workpiece stages, workpiece stage measurement devices, workpiece stage driving devices and sensor signal transmission devices, wherein the two workpiece stages work between a measurement position and an exposure position, the positions of the workpiece stages are measured by adopting a plane grating, coil arrays are cooled by adopting a double-layer water cooling structure, the workpiece stages are driven by adopting air suspension and planar motors, and the planar motors are adopted to drive the two workpiece stages to achieve quick single-beat arc stage exchange in the double-workpiece-stage exchange process. The problems of large beat number, long trajectories, multiple start-stop links, long stabilization time and the like of an existing stage exchange scheme are solved, stage exchange links are decreased, the stage exchange time is shortened, and the productive rate of a photo-etching machine is improved.

The invention discloses a method for controlling double channel synchronization. A double channel comprises two channel bodies; and double channel synchronization comprises power-on synchronization and cycle synchronization. The method for controlling double channel synchronization comprises the steps: controlling power-on synchronization, specifically, timer interrupt is controlled by judging theorder of the time that the two channel bodies complete the initialization; and controlling cycle synchronization, specifically, a timer interrupt timer is reset by judging whether last small frame beat numbers of the two channel bodies are consistent or not. The invention also discloses a system for controlling double channel synchronization. The method for controlling double channel synchronization reduces the timing difference of the timer interrupt of the double channel.

The invention discloses an accompaniment music generation method and device and a computer readable storage medium, and belongs to the technical field of computers. The method comprises the steps of determining a target beat number of initial music, wherein the target beat number is a beat number per minute of the initial music, in the virtual musical instruments corresponding to the at least twobeat number ranges, determining a target virtual musical instrument corresponding to the beat number range where the target beat number is located, in the playing process of the initial music, receiving at least two trigger instructions for the target virtual musical instrument, and according to the receiving time of the at least two trigger instructions, combining the sound of the target virtualmusical instrument indicated by each trigger instruction in the at least two trigger instructions to obtain accompaniment music. The problem that computer software related to music creation is singlein function is solved. The method is used for generating accompaniment music.

The invention relates to the technical field of music auxiliary teaching, and discloses a rhythm vision singing visualization method, a system and a device, and the method comprises the following steps: S1, inputting beat numbers and a plurality of notes in sequence, and presetting a beat time value and reference loudness; S2, sequentially obtaining a beat number and a plurality of notes according to the sequence; S3, determining the beatstrength according to the beat number, determining the rhythm strength according to the note sequence, and synthesizing or calling a corresponding audio according to the beat strength, the rhythm strength and the reference loudness; S4, determining information such as the position of an indication module according to the beat number and the note information; and S5, controlling the indication module to move according to a trajectory, and controlling a sound production module to synchronize the audio sound production. The beneficial effects of the invention are that a music note unit module and a beat number unit module which can be freely combined are arranged, and the acoustic model synthesis technology is combined, so that the rhythm content of autonomous sighting and singing practice is enriched, and the individual demands of users are met; and by arranging a visualization module, the difficulty of video singing rhythm practice is reduced.