3results about How to "Reduce Turnover Costs" patented technology

This invention relates to the field of carbon dioxide fracturing technology, specifically to a special powder for carbon dioxide activators and its large-scale preparation process. The special powder uses potassium perchlorate, salicylic acid, and ammonium oxalate as main raw materials, compounded with trace functional additives. The formula is scientifically controlled, possessing both high exothermic properties and inherent safety. The preparation process includes: pre-treating the raw materials followed by multi-gradient drying, graded ball milling and sieving, pre-mixing, homogenization and mixing, and secondary drying. The special powder prepared by this invention has a component uniformity deviation of ≤1%, a shelf life of up to 24 months at room temperature with sealing, 100% ignition reliability, and is compatible with various carbon dioxide fracturing devices, exhibiting significant safety, environmental, and economic advantages in mining, municipal engineering, and high-gas mines.

The invention relates to the technical field of geotechnical engineering and underground structure construction, and discloses a culvert construction anti-sedimentation adjustable supporting reinforcing device which comprises a transverse supporting adjusting beam, a vertical supporting column is installed at the bottom of the transverse supporting adjusting beam, and a supporting column base bearing platform is arranged at the bottom of the vertical supporting column. A non-slip mat is arranged at the bottom of the supporting column base bearing platform, a culvert supporting frame is arranged outside the transverse supporting adjusting beam, foldable supporting arm mechanisms are installed on the two sides of the culvert supporting frame, a culvert contour adjusting mechanism is installed on the top of the transverse supporting adjusting beam, and drainage mechanisms are installed at the two ends of the non-slip mat. By means of the foldable supporting arms, the storage size can be reduced, the transferring and entering difficulty can be reduced, the special-shaped culvert section can be adapted, lateral supporting force can be provided in a grading mode, side wall deformation can be controlled, meanwhile, the whole construction stage is dynamically adapted, anti-sedimentation supporting is strengthened, and the operation cost is lower.

This invention provides a method, device, and computer storage medium for obtaining cerebrovascular function compensation indicators. The method includes: acquiring four-dimensional image data of a subject's brain, including dynamic magnetic susceptibility contrast-enhanced MRI data or CT perfusion imaging data; inputting the four-dimensional image data into a physical information neural network model, which outputs cerebrovascular function compensation indicators, including cerebrovascular reactivity as a first indicator and oxygen extraction fraction as a second indicator; wherein the physical information neural network model includes a compensation mapping component, which generates the first and second indicators and introduces a nonlinear inverse proportional relationship to correct the first and second indicators. This invention provides a safe, efficient, accurate, and comprehensive method for obtaining cerebrovascular function compensation indicators.