Vertical take-off and landing (VTOL) aircraft have become important aerial vehicles for various sectors, such as security, health, and commercial sectors.These vehicles are capable of operating in different flight modes, allowing for the covering of most flight requirements in most environments.A tail-sitter aircraft is a type of VTOL vehicle that

The artificial replication of an olfactory system is currently an open problem.The development of a portable and low-cost artificial olfactory system, also called electronic nose or eNose, is usually based on the use of an array of different gas sensors types, sensitive to different target gases.Low-cost Metal-Oxide semiconductor (MOX) gas sensors

The process of decorating interior spaces often produces substances that are harmful to the human body, which seriously spoils the decorating experience.Photocatalyst is the oxidant of nanometer titanium dioxide.It cannot be oxidized by itself.This Multiminerals article aims to discuss photocatalysts and interior and exterior design.When there is l