Abstract: The disclosed apparatus, systems and methods relate to a framelet-based iterative algorithm for polychromatic CT which can reconstruct two components using a single scan. The algorithm can have various steps including a scaled-gradient descent step of constant or variant step sizes; a non-negativity step; a soft thresholding step; and a color reconstruction step.

Abstract: The disclosure relates to the technical field of bridge construction, in particular to a method for installing steel tube arches, which comprises the following steps: step S1, erecting steel tube arch assembling brackets; step S2, assembling a steel tube arch of longitudinally moving segment; step S3, installing temporary tie rods; step S4, dismantling the assembling brackets; step S5, longitudinally moving the steel tube arch of longitudinally moving segment; step S6, erecting an arch springing bracket and assembling small mileage arch springing segments; step S7, closing the steel tube arch; S8, arch falling and temporary auxiliary facilities dismantling; step S9, construction of concrete and suspenders in arch. The method for installing steel tube arches provided by the disclosure is safe, standardized and reliable, and the construction standard is prone to control.

Abstract: The disclosed apparatus, systems and methods relate to a framelet-based iterative algorithm for polychromatic CT which can reconstruct two components using a single scan. The algorithm can have various steps including a scaled-gradient descent step of constant or variant step sizes; a non-negativity step; a soft thresholding step; and a color reconstruction step.

Abstract: The disclosure relates to the technical field of bridge construction, in particular to a method for installing steel tube arches, which comprises the following steps: step S1, erecting steel tube arch assembling brackets; step S2, assembling a steel tube arch of longitudinally moving segment; step S3, installing temporary tie rods; step S4, dismantling the assembling brackets; step S5, longitudinally moving the steel tube arch of longitudinally moving segment; step S6, erecting an arch springing bracket and assembling small mileage arch springing segments; step S7, closing the steel tube arch; S8, arch falling and temporary auxiliary facilities dismantling; step S9, construction of concrete and suspenders in arch. The method for installing steel tube arches provided by the disclosure is safe, standardized and reliable, and the construction standard is prone to control.

Abstract: The disclosed apparatus, systems and methods relate to a framelet-based iterative algorithm for polychromatic CT which can reconstruct two components using a single scan. The algorithm can have various steps including a scaled-gradient descent step of constant or variant step sizes; a non-negativity step; a soft thresholding step; and a color reconstruction step.

Abstract: The present invention relates to a method for synthesizing a compound of 3-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid, wherein including the steps of: (A) the diethyl ester compounds represented by the following Formula IV are reacted under the action of amine, alkali and carbonyl reagents to produce the acrylic diester compound represented by the following Formula I, wherein: (B) the above compound represented by the Formula I is reacted with a fluoride reagent, a Lewis acid and a methyl hydrazine to form a pyrazole ring-containing diester compound represented by the Formula II, (C) the heterocyclic-containing diester compound represented by the Formula II is reacted with a base to give 3-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid represented by the Formula III.

Abstract: The disclosed apparatus, systems and methods relate to a framelet-based iterative algorithm for polychromatic CT which can reconstruct two components using a single scan. The algorithm can have various steps including a scaled-gradient descent step of constant or variant step sizes; a non-negativity step; a soft thresholding step; and a color reconstruction step.

Abstract: The disclosed apparatus, systems and methods relate to a framelet-based iterative algorithm for polychromatic CT which can reconstruct two components using a single scan. The algorithm can have various steps including a scaled-gradient descent step of constant or variant step sizes; a non-negativity step; a soft thresholding step; and a color reconstruction step.

Abstract: The present invention relates to a method for synthesizing a compound of 3-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid, wherein including the steps of: (A) the diethyl ester compounds represented by the following Formula IV are reacted under the action of amine, alkali and carbonyl reagents to produce the acrylic diester compound represented by the following Formula I, wherein (B) the above compound represented by the Formula I is reacted with a fluoride reagent, a Lewis acid and a methyl hydrazine to form a pyrazole ring-containing diester compound represented by the Formula II, (C) the heterocyclic-containing diester compound represented by the Formula II is reacted with a base to give 3-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid represented by the Formula III.

Abstract: The disclosed apparatus, systems and methods relate to a framelet-based iterative algorithm for polychromatic CT which can reconstruct two components using a single scan. The algorithm can have various steps including a scaled-gradient descent step of constant or variant step sizes; a non-negativity step; a soft thresholding step; and a color reconstruction step.