Achieving a High-Output Direct-Current Droplet Triboelectric Generator via Synergistic Effects of a Dual Switch and Electric Double Layer.

Droplet triboelectric generators (D-TENGs) have garnered significant attention for harvesting raindrop energy but face challenges such as low output performance and alternating current (AC) output. This study proposes a high-performance direct current (DC) D-TENG with a dual-switch (DS) structure (DS-DC-D-TENG) that synergizes dual-switch effects and electric double layers (EDL) to generate DC pulses. Remarkably, using 0.

Extraction of line segments and circular arcs from freehand strokes based on segmental homogeneity features.

The extraction of component line segments and circular arcs from freehand strokes along with their relations is a prerequisite for sketch understanding. Existing approaches usually take three stages to segment a stroke: first identifying segmentation points, then classifying the substroke between each pair of adjacent segmentation points, and, finally, obtaining graphical representations of substrokes by fitting graphical primitives to them. Since a stroke inevitably contains noises, the first stage may produce wrong or inaccurate segmentation points, resulting in the wrong substroke classification in the second stage and inaccurately fitted parameters in the third stage.