Based on the determination of the contents of several heavy metal elements Cd, Co, Pb, Cu, Ni and three species of sulfur of different specific gravities of Qingshan bituminous, the regression models of three variables were established to fit the data of the several heavy metal elements and three species of sulfur in coal by means of cross test.

Qingshan bituminous powder was classified into seven parts of different specific gravity and the contents of trace elements Be, Cd, Co, Cu, Pb, Cr, Ni, As and three species of sulfur were determined.

Todays, the three-state current hysteresis control has an extensive application.

A scheme for teleporting an unknown entangled state of three three-level particles is proposed when four three-level particles state of maximally entangled is used as quantum channel.

We propose a scheme for probabilistically teleporting an unknown three-particle entangled state of three-level by using a four-particle entangled state of three-level as quantum channel.