Abstract: A new colorimetric detection method for sulfur-containing pesticides with nano-mimetic enzyme is provided. The synthesized gold-silver bimetallic nanocluster (Au—Ag NCs) has quasi-peroxidase activity and catalyze hydrogen peroxide to oxidize 3,3?,5,5?-tetramethylbenzidine (TMB) to form blue products under acidic conditions. Based on the electrostatic interaction between Au—Ag NCs and four sulfur-containing pesticides, the exposed Au and Ag elements further combine with S in pesticide molecules to form bonds, and Au—Ag NCs loses the quasi-peroxidase activity and blocks the catalytic oxidation process.

Abstract: This application provides a light update method for a virtual scene in response to a content change performed by an electronic device. The method includes: performing voxelization processing on a virtual scene to obtain a plurality of initial voxels corresponding to the virtual scene, each initial voxel carrying light information of a corresponding position in the virtual scene; selecting at least one voxel from the plurality of initial voxels in response to the content change in the virtual scene; updating light information carried in the at least one selected voxel, to obtain an updated voxel corresponding to the at least one selected voxel; and updating light information of a virtual viewpoint in the virtual scene based on the updated voxel and other initial voxels whose light information has not been updated.

Abstract: A walking device with a self-adaptive track gauge and wheel pressure for preventing rail gnawing comprises a first rail, a second rail parallel to the first rail, a driving trolley disposed on the first rail, a driven trolley disposed on the second rail, two beams connected between the driving trolley and the driven trolley and each of which having a sliding groove, and an electric hoist disposed on the two beams. The driving trolley is hung on the first rail through a first bearing wheel, and the driven trolley is hung on the second rail through a second bearing wheel. The driving trolley is connected with a driving motor, and the driving trolley is configured to drive the driven trolley to synchronously move along length directions of the first rail and the second rail through the two beams, so that the electric hoist is driven to synchronously move.

Abstract: An improved flexible hose is described. The flexible hose may have a helical wire core with at least one thermoplastic layer over the core forming the hose. The helical wire forms a plurality of peaks separated by adjacent valleys on the hose. The peaks have a protective strip over the peaks that may extending along the peaks on the hose. The protective strip covers substantially only the peaks while leaving a major portion of the valleys uncovered by the strip.