Pham Huy Dien

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The lectures scheduling problem of large-scale size is considered very hard and cannot be solved by exact deterministic methods. Usually, heuristic procedures are used to deal with this problem and the one based on the Exchange Procedure proposed by Ferland is of prospect. In the present work we describe another approach based on Tabu Search technique and(More)
Basing on some cryptographic primitives widely recognized to be de facto standards in modern cryptology, we build a security server that provides data encryption services, authentication and digital signature schemes for users of a local area network. We exploit the well-established mathematical methods for building primitives, but our detail implementation(More)
The lectures scheduling problem of large-scale size is considered very hard and cannot be solved by exact deterministic methods. Usually, heuristic procedures are used to deal with this problem and the one based on the Exchange Procedure proposed by Ferland is of prospect. In the present note we describe another approach based on Tabu Search technique and(More)
  • Ha Huy Khoai, Dao Trong Thi, +21 authors Tran Loc Hung
  • 2005
The classical analysis is often based on fine behaviors which are valid for all points of some subsets, even if some distance tends to zero. Since many things of the material universe and many objects represented by digital computers cannot satisfy such for-all-requirements, the so-called rough analysis is developed as an approach to such rough worlds. In(More)
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