Abstract: Methods, apparatus and systems for wireless human-nonhuman motion detection are described.

Abstract: A method and a system for detecting heavy metal ions are provided. The method includes: fixing a pre-manufactured micro-electrode chip on a connecting device, connecting the connecting device to an electrochemical workstation, carrying out setting before detection on the electrochemical workstation, the micro-electrode chip including a counter electrode and a working electrode, carrying out graphene modification treatment on the counter electrode in advance, and carrying out bismuth film modification treatment on the working electrode in advance; and carrying out acid pretreatment on an aqueous solution to be detected, dropwise adding 5 µL to 100 µL of a treated aqueous solution to a working area of the pre-manufactured micro-electrode chip, measuring an I-V curve by the electrochemical workstation subjected to the setting before detection, and determining species and concentrations of heavy metal ions in the aqueous solution according to peak values of voltage and current of the I-V curve.

Abstract: The invention provides a force stimulation loading device and a working method thereof, the force stimulation loading device comprises: a containing body, a stretching mechanism and a twisting mechanism; the containing body is suitable for containing a gel encapsulating cardiomyocytes, and is made of a non-rigid material; the stretching mechanism is suitable for stretching or squeezing the containing body from opposite sides of the containing body to apply a stretching or squeezing force to the gel; the twisting mechanism is suitable for twisting the containing body to apply a twisting stress to the gel; the force stimulation loading device of the present invention is capable of simultaneously applying the stretching or squeezing force and the twisting stress to the gel encapsulating the cardiomyocytes through the stretching mechanism and the twisting mechanism, that is, applying the stretching or squeezing force and the twisting stress to the cardiomyocytes at the same time.