7 results about "Line spread" patented technology

The application provides a feature reflection wave travel time inversion method, device, equipment and storage medium. The method comprises the following steps: performing extended domain migration imaging on observed seismic shot gather data to obtain an extended domain common imaging point gather; selecting a target stratum from a zero offset profile of the extended domain common imaging point gather based on the extended domain common imaging point gather; selecting a common imaging point gather of the target stratum from the extended domain common imaging point gather based on the target stratum; performing de-migration forward simulation on the common imaging point gather to obtain feature reflection wave data of the target stratum; establishing a travel time inversion framework based on the feature reflection wave data to obtain simulated reflection wave data; calculating reflection wave travel time difference based on the feature reflection wave data and the simulated reflection wave data; calculating a gradient of travel time inversion based on the travel time difference; and updating a velocity model based on the gradient of travel time inversion. The method can restore various wave number components of the velocity model, thereby improving inversion efficiency.

The application discloses an infrared weak small target detection method based on line-by-line detection, and solves the problems of high detection delay and large resource consumption caused by global image caching in the prior art. The method skips the traditional "read-out-caching-global detection" process and performs real-time detection while reading out the infrared image data line by line. The method comprises the following steps: performing first-order and second-order differential calculation on a single-line image vector, extracting and fusing the intra-line spatial features; inputting the continuous multi-line features into an inter-line fusion module based on a self-attention mechanism in parallel, and restoring the high-dimensional features of the target; then, completing target detection through a U-Net network, and adapting the dimension through a line expansion and line compression module; and in the training, adaptively selecting a loss function according to whether the current line block contains a target, so as to improve the training efficiency. The application realizes parallel processing of detection and data reading, significantly improves the timeliness of detection, and reduces the demand for cache and computing resources of edge devices.

A single-target orbit determination method, device, medium and product based on multi-satellite observation belong to the technical field of space target tracking orbit, and solve the problem of low tracking accuracy for orbit flying targets. The method comprises the following steps: creating a line-of-sight unit vector from an observation node to a target node in a satellite body coordinate system; converting the line-of-sight unit vector into an inertial coordinate system; obtaining observation values of each observation satellite; obtaining an observation model of multi-observation satellites observing a single target; obtaining a state model of the multi-observation satellites observing the single target; performing linearization and discretization processing on the observation model and the state model; performing extended Kalman filtering iterative calculation and completing target observation orbit determination. The application is suitable for the field of space target detection technology and space-based optical observation.

The utility model provides a simple and easy pile foundation lime line spreading device, effective solution current pile foundation lime line spreading device needs artificial shaking in use, center is unstable, the problem that easy artificial increases error, its solution technical scheme is, including the cylindrical shell of upper end opening, the lime powder is deposited in the cylindrical shell, the cylindrical shell is fixed with the same coaxial casing, is inserted in casing and is equipped with the alignment rod, the disc is fixed to the alignment rod lower extreme, and the disc is located cylindrical shell downside, Downside board of cylindrical shell be equipped with a plurality of the discharge gate that is circularly distributed, and a plurality of control material mouth that correspond with the discharge gate one to one are seted up on the disc, whether the lime in the cylindrical shell cavity can fall is controlled by the alignment or the dislocation control of discharge gate and control material mouth, the utility model discloses ingenious structure, completes the pile foundation lime line spreading through the mode of rotation, and the center keeps stable and does not move in the spreading process, is favorable to the construction efficiency and the accuracy of improvement pile foundation.

1. The name of the design product: full intelligent infrared line spread green withering drying all-in-one machine. 2. The use of the design product: the design product uses infrared rays to spread green and dry tea leaves. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The invention discloses a line-by-line detection infrared weak and small target detection method, and solves the problems of high detection delay and large resource consumption caused by global cache of images in the prior art. According to the method, the traditional process of reading-caching-global detection is skipped, and real-time detection is carried out while infrared image data are read line by line. The method comprises the following steps: performing first-order and second-order differential calculation on a single-row image vector, and extracting and fusing in-row spatial features; inputting the continuous multi-row features into an inter-row fusion module based on a self-attention mechanism in parallel, and recovering high-dimensional features of the target; target detection is completed through a U-Net network, and dimension adaptation is carried out through a row expansion and row compression module; in training, the loss function is adaptively selected according to whether the current row block contains the target so as to improve the training efficiency. According to the method, parallel processing of detection and data reading is achieved, the detection timeliness is remarkably improved, and the requirements for caching and computing resources of edge devices are reduced.

The application discloses a kind of beam bridge structure damage diagnosis methods based on line-surface information fusion, the method utilizes distributed optical fiber to collect beam bridge sparse measuring point information, and the strain data set of non-encryption and encryption area is obtained by encrypting key section;Using the method of sparse optimization, the data collected is denoised, the way of introducing Gaussian process regression combined with space kernel is used, the strain data of non-encryption area is used to extend and reconstruct the monitoring data of encryption area, and the strain data of the whole monitoring area is obtained;After obtaining the strain data, the strain data correlation coefficient in different time domain is calculated, and the damage feature matrix is constructed;By solving the Frobenius norm of correlation matrix, the structure damage threshold is established by using kernel density estimation method, and the effective early warning of bridge structure risk is realized.The method can improve the monitoring efficiency of sensor, realize the lightweight structure health monitoring, and provide effective protection for the safe operation and maintenance of bridge structure in operation period.