6results about How to "Guaranteed Compression Efficiency" patented technology

The invention relates to the technical field of data processing, in particular to an aquaculture environment monitoring method based on the Internet of Things technology, and the method comprises the steps: obtaining a water quality detection data sequence at a plurality of sampling points in a reservoir, and dividing the water quality detection data sequence into a plurality of subsequences; mutation points are obtained according to fluctuation characteristics of the subsequences; obtaining a first retention degree of the fluctuation range according to the distribution characteristics and the distance characteristics of the mutation points; obtaining a discrete degree characterization value according to the position characteristics of the mutation points, and obtaining a rule evaluation coefficient according to the length characteristics of the decomposed residual sequence and the stable characteristics of data fluctuation. And obtaining a correction coefficient of a preset threshold value according to the first retention degree, the discrete degree representation value and the law evaluation coefficient, and compressing the water quality detection data sequence according to the correction coefficient and a revolving door algorithm. According to the method, the threshold value is adaptively determined according to the analysis result of the data fluctuation characteristics in the water quality detection data sequence, and the data retention degree reflecting abnormal conditions is improved while the overall compression efficiency is guaranteed.

A path compensation method for time-reversal pulse compression, step 1, the initial signal s ori (t) is injected into the time reversal system to obtain the response signal s res (t); Step 2, intercept the response signal s of two decay time constants res (t), and then time-flip to s res (‑t), and recorded as the inversion signal s rev (t) = s res (‑t); Step 3, select the amplitude value of the maximum path of the inversion signal as A 0 =max{|A i |}, and the path of the inversion signal is compensated and corrected to A 0 , the compensated inversion signal can be expressed as #imgabs0#Step 4, injecting or radiating the compensated inversion signal into the time reversal system through the receiving port, which can generate pulse compression at the initial position and obtain the same pulse waveform as the initial signal; used in the time reversal pulse compression system, the inversion signal is usually an oscillation attenuation signal; improves the pulse compression efficiency and the gain of the time reversal pulse compression system; has the characteristics of simple method, easy implementation, and can effectively improve the time reversal pulse compression gain.

The utility model relates to a valve plate assembly, a compression air cylinder and a compression device.The valve plate assembly comprises a valve plate, a first valve block, a pressing plate and a second valve block, the valve plate is provided with a first mounting groove, a second mounting groove, a first air channel and a second air channel, the first valve block is arranged in the first mounting groove, and when air flow passes through the first air channel and flows from the side, back on to the first valve block, of the valve plate to the other side, the first valve plate is arranged in the first mounting groove, the part of the first valve plate deforms to open the first air channel, the pressing plate is arranged in the second mounting groove, the second valve plate is clamped between the valve plate and the pressing plate, and when airflow flows towards the second air channel through the third air channel, the part of the second valve plate deforms to open the third air channel. According to the valve plate assembly, the compression air cylinder and the compression device, the first installation groove and the second installation groove in the valve plate are used for providing installation spaces for the first valve plate and the second valve plate correspondingly, and therefore when the valve plate is installed on the cylinder body of the compression air cylinder, installation of the first valve plate and the second valve plate does not occupy the volume space in the cylinder body, and the compression efficiency is ensured.

The invention is suitable for the technical field of image processing, and particularly relates to a flying animal shot image processing method and system, and the method comprises the steps: reading an image containing a flying animal, constructing a double linked list, marking a head node and a tail node, carrying out the linking through a main link and an auxiliary link, and inputting the image into the head node; and in the head node, preprocessing the image, determining the contour of the flying animal, creating a mask, covering the contour, delimiting a mask area, defining the mask area as a main image by using a pre-constructed edge detection algorithm, defining the part except the mask area in the image as an auxiliary image, and transferring the main image into a main link. According to the method, the compression area can be delimited, redundant information can be removed and the compression efficiency can be ensured by calculating the discrete value, and the visual efficiency can be improved by updating the intermediate image, so that the detail features of the flying animals in the main image are highlighted while the auxiliary image is compressed.

The invention relates to a data compression method and device, computer equipment, a chip and a chip module. The method comprises the following steps: acquiring a compression reference value and a compression threshold value corresponding to data to be compressed; the compression reference value is used for determining a compression mode corresponding to the to-be-compressed data, and the compression threshold value is used for determining whether to compress the to-be-compressed data; under the condition that the to-be-compressed data meets the compression threshold value, determining a compression mode corresponding to the to-be-compressed data according to the compression reference value; and according to the compression mode, performing corresponding compression processing on the to-be-compressed data to obtain compressed data corresponding to the to-be-compressed data. By adopting the method, the data compression quality can be improved.

The present application relates to the field of three-dimensional data encoding technology, and specifically to a three-dimensional data encoding method for a multi-mode physical simulation system based on a neural network, the method comprising: obtaining a three-dimensional point cloud at each moment in the multi-mode physical simulation system; using feature point detection and clustering algorithms, according to the distribution characteristics of the three-dimensional point cloud, combined with the clustering cluster where the three-dimensional point cloud is located and the distribution characteristics of feature points in a local range, obtaining an information distribution characteristic value; according to the change characteristics of the three-dimensional point cloud distribution over a period of time, combined with the change characteristics of the clustering cluster where the three-dimensional point cloud is located, obtaining an information change characteristic value; combining the information distribution characteristic value, dividing the three-dimensional point cloud, and encoding all three-dimensional point clouds at each moment using a compression algorithm. The present application aims to dynamically adjust the compression of the three-dimensional point cloud based on the effective information contained in the three-dimensional point cloud, and enhance the timeliness, accuracy and efficiency of the multi-mode physical simulation system.