Abstract: An exemplary system and method are disclosed for providing visual communication between agents in a multi-agent system. In some implementations, the exemplary system and method are configured to (i) receive and decode a data packet or message visually received from other communication targets and (ii) visually transmit a reply data packet or message, in response to the communication targets, using a digital or electromechanical display.

Abstract: A gradient wettability tool and a fabrication process thereof are disclosed, the gradient wettability tool comprising a tool body and a lyophobic layer arranged on a surface of the tool body. A lyophilic micro-texture is arranged on a part of a surface of the lyophobic layer, and comprises main trapezoid grooves, a wide end of which is arranged in a tool-chip interface of the tool with a distance of 1 to 200 ?m from a midpoint of the wide end of the groove to a cutting edge of the tool, and inward-radiated trapezoid microgrooves, a wide end of which is arranged to be connected to a narrow end of the main trapezoid groove. The gradient wettability tool allows directional transport of a cutting fluid and reduction of friction forces at tool-workpiece and tool-chip interfaces, and thus provides wear reduction.