3results about How to "Control swelling" patented technology

The invention provides a polyacrylonitrile precursor, a carbon fiber and a preparation method thereof. The preparation method of the polyacrylonitrile precursor adopts wet spinning and comprises the steps of coagulating bath and hot water drafting, the hot water drafting at least comprises three times of hot water drafting, the swelling degree of the fiber after the second time of hot water drafting is 110-155%, and the total drafting multiplying power of the hot water drafting is 1.5-6.5 times. The modulus of the polyacrylonitrile precursor is 130 to 160 cN / dtex; the breaking strength of the polyacrylonitrile precursor is 5.80 cN / dtex to 6.50 cN / dtex; the average number of broken filaments per 10000 meters of the polyacrylonitrile precursor is not more than 15; the dispersion coefficient of the fineness of the polyacrylonitrile precursor is 3-5. The invention has the advantages of oil demulsification, less deterioration, high mechanical properties of the precursor, small fineness dispersion coefficient, and less broken filaments and broken filaments in a graphitization furnace.

This invention discloses a deep foundation pit support structure on a slope, comprising: a vertically arranged transverse cast-in-place pile group; longitudinal cast-in-place pile groups at both ends of the transverse cast-in-place pile group near the bottom of the slope; two longitudinal cast-in-place pile groups perpendicular to the sides of the transverse cast-in-place pile group; both the transverse and longitudinal cast-in-place pile groups consist of several vertically arranged cast-in-place piles; the tops of the transverse cast-in-place pile group and the two longitudinal cast-in-place pile groups are connected to each other by a capping beam; the capping beam has a bracing at one end of its two opposite short sides and the end furthest from its long side; corner braces are provided between the two short sides and the long side of the capping beam; one end of each corner brace is connected to the middle of the short side of the capping beam, and the other end is connected to the long side of the capping beam; the end faces of the two short sides of the capping beam are connected to one end of an end support through a head plate; the other end of the end support cooperates with a support seat set in the slope; the end support has a set inclination angle; and oblique end supports are provided on the capping beam to transmit eccentric loads and maintain the external stability of the foundation pit.

The invention provides a data cleaning method and device, equipment, a storage medium and a program product, and can be applied to the technical field of big data and financial science and technology. The method comprises the steps that in response to received multiple candidate database requests, screening is conducted in the multiple candidate database requests, target database requests matched with batch job characteristics are obtained, and the batch job characteristics indicate operation conditions of database requests to be screened; based on the target database request and a global view, screening is carried out in the multiple candidate temporary tables to obtain a target temporary table, and the global view indicates the dependency relationship of the multiple candidate temporary tables; and in response to a received completion instruction of the target database request, executing a cleaning operation on the target temporary table.