Abstract: A prestressed fish-belly reaction frame, a pile foundation bearing capacity detection device and application thereof, which includes: a core junction; a reaction beam including a plurality of beam units symmetrically arranged around the core junction with the core junction as a center, each beam unit has a first end and a second end, the first end is connected and fixed to the core junction, and the second end is connected and fixed to a pile top of an anchor pile when the pile foundation bearing capacity is detected; a prestressed assembly including a plurality of prestressed tendons, each prestressed tendon passes through an upper end of the core junction, a first end of each prestressed tendon is connected and fixed to the second end of one beam unit, a second end thereof is connected and fixed to the second end of the symmetrical beam unit.

Abstract: A kit is employed in the method for detecting droplet drift or deposition characteristics of spray. The detection kit includes detection membranes carrying immobilized probes, transition probes capable of specifically binding to the immobilized probes, and biotinylated chromogenic probes capable of specifically binding to the transition probes. The transition probes are added to the agricultural spray as tracers. After spraying, the sprayed transition probes specifically bind to the immobilized probes on the detection membranes. The biotinylated chromogenic probes are added to bind to the transition probes through hybridization. After the chromogenic treatment, the deposition volume of droplets is determined according to the color depth, and the droplet parameters are determined according to the position and size of chromogenic spots.

Abstract: A kit for simultaneously detecting the droplet drift or deposition of multiple sprays includes detection membranes fixed with immobilized probes, transition probes capable of specifically binding to the immobilized probes, and biotinylated chromogenic probes capable of specifically binding to the transition probes. The transition probes are added to the spray liquids as tracers. After spraying, the transition probes specifically bind to the immobilized probes on the detection membranes. The biotinylated chromogenic probes bind to the transition probes through hybridization. After the chromogenic treatment, the droplet volume is determined according to the color depth, and the spray deposition parameters of droplets are determined according to the location and size of colored spots.