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  • May 21, 2022

Theory and technology of air filtration: review

February 7, 2022 Engineering No Comments

The development of modern science and technology, improving the level ofindustrialization, increase people’s awareness of environmental protection were leaded tothe world’s demand for filter materials to purify the air. This review presented an overviewof air pollutants classification, history of fiber materials, theory of air filtration …..

Palindromic, periodic and Möbius Rubik’s snakes

October 19, 2021 Engineering No Comments

A Rubik’s Snake is an interesting toy which can be thought as a serial chain with applications in the construction of reconfigurable modular robots. In this paper, we present some theorems related to a Rubik’s snake with palindromic, periodic and Möbius properties. Examples are given …..