N??c r? rác là n??c th?i t? bãi chôn l?p ch?a các thành ph?n ô nhi?m ? n?ng ?? cao. Do ?ó, vi?c x? lý c?n m?t h? th?ng ph?c t?p bao g?m quá trình hóa h?c, lý, sinh h?c và nâng N?ng cao c?a amoniac trong ng?n c?n s? phát tri?n vi v?t nên lo?i b? amoni xu?ng th?p h?n, t?o ?i?u ki?n thu?n l?i cho ti?p theo. Trong nghiên c?u này, tháp tách khí ?? t?ng h?p ?ã ???c thi?t k? th? nghi?m. ?nh h??ng pH, ...

A packing of Kn with copies of C4 (the cycle of length 4), is an ordered triple (V, C, L), where V is the vertex set of the complete graph Kn, C is a collection of edge-disjoint copies of C4, and L is the set of edges not belonging to a block of C. The number n is called the order of the packing and the set of unused edges L is called the leave. If C is as large as possible, then (V, C, L) is c...

A packing of Kn with copies of C4 (the cycle of length 4), is an ordered triple (V, C, L), where V is the vertex set of the complete graph Kn, C is a collection of edge-disjoint copies of C4, and L is the set of edges not belonging to a block of C. The number n is called the order of the packing and the set of unused edges L is called the leave. If C is as large as possible, then (V, C, L) is c...

Let F = fC 1 ; C 2 ; : : : ; C n g be a family of n disjoint convex bodies in the plane. We say that a set V of exterior light sources illuminates F, if for every boundary point u of any member of F there is a point v in V such that u is visible from v, i.e. the open line segment joining u and v is disjoint from F. An illumination system V is called primitive if no 1 2 Valeriu Soltan, LL aszll ...

1. L. K a r t t u n e n ( K a r t t u n e n 1970, 1971) demons t r a t ed t h a t i n E n g l i s h t h e r e e x i s t s i x c l a s s e s o f p r e d i c a t e s t h a t d i f f e r as f o r t h e r e l a t i o n s h i p s h o l d i n g be tween the p r e d i c a t e and i t s s e n t e n t i a l complement: f a c t i v e s , p o s i t i v e and n e g a t i v e two-way i m p l i o a t i v e s...