The ever increasing demand of mineral resources in China was assessed and it is suggested that the development of superlarge ore deposits was the best way to me
ORTHOGONAL arrays (OAs) have important applications to many fields. A lot of OAs and their construction methods have been introduced in the experimental design
A finite collection of random variables, X<sub>1</sub>,…, X<sub>n</sub> (n≥2), is said to be negatively associated (NA) if any two coordinatewise nondecreasing (or
IN ref. [1] Jacobson proved the structure theorem for primitive rings with nonzero socles that R is a primitive ring withsocle S≠{0} if and only if there is a