string concatenation operator
concomitant implication operator
High-concentration and low-concentration wastewater
minimum inhibitory concentration and minimum bactericidal concentration
the minimum inhibitory concentration and minimum bactericidal concentration
accounting-operator number identification(CAMA-ONI)operator
Bernstein-type operator (B-type operator)
lowering operator and raising operator
singular integral operator and potential operator
The Derived Operator of Kleene Implication Operator
the Wigner operator and the entangled Wigner operator
[Estimated environmental concentration
2+1 two stage concentration process
3-D stress concentration
50% lethal（activity inhibition）concentration(LC50)