In this paper, we consider explicit constructions of perfect hash families using combi-natorial methods. We provide several direct constructions from combinatorial structures related to orthogonal arrays. We also simplify and generalize a recursive construction due to Atici, Magliversas, Stinson and Wei 3]. Using similar methods, we also obtain eecient… (More)
The existence of positive periodic solutions of discrete nonautonomous Lotka-Volterra systems with delays is studied by applying the continuation theorem of coincidence degree theory.
We study the existence and exponential attractivity of periodic solutions to Cohen-Grossberg neural network with distributed delays. Our results are obtained by applying the continuation theorem of coincidence degree theory and a general Halanay inequality.
Non-small cell lung cancer (NSCLC) accounts for about 85% of all lung cancers. Traditional chemotherapy for this disease leads to serious side effects. Here we prepared an inhalable oridonin-loaded poly(lactic-co-glycolic)acid (PLGA) large porous microparticle (LPMP) for in situ treatment of NSCLC with the emulsion/solvent evaporation/freeze-drying method.… (More)
PURPOSE To establish a prognostic index model for advanced pancreatic cancer patients receiving palliative chemotherapy based on clinical variables. METHODS The clinical data of 118 patients with advanced pancreatic cancer who received palliative chemotherapy between January 2006 and August 2013 in our center were retrospectively analyzed. Prognostic… (More)
In this paper, we study 2-(v; k; 1) designs with automorphisms of prime order p, having the maximum possible number of xed points. We prove an upper bound on the number of xed points, and we study the structure of designs in which this bound is met with equality (such a design is called a p-MFP(v; k)). Several characterizations and asymptotic existence… (More)
A generalized H-code is deened by Bhattacharya as a special kind of Abelian codes. In this paper, we deene GH-set and give some necessary and suucient conditions for a generalized H-code to be doubly even self-dual. Some examples of such doubly even self-dual codes are also given.