This paper describes a natural framework for rules , based on belief functions , which includes a repre­ s entation of numerical rules, default rules and rules allowing and rules not allowing contraposition. In particular it justifies the use of th e Dempster-Shafer Th eory for representing a particular class of rules , Belief calculated being a lower probability given cer­ tain independence as...

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the gradual depletion of fossil fuels and the increase on their cost have made the researchers to look for renewable sources of energy. biodiesel fuel has attracted many researchers due to its low environmental pollution and being a renewable fuel. in this research, biodiesel was prepared by transesrtification of persian lilac seed oil. the prepared fuel was mixed with regular petro diesel in 0...

T h e e x t e n d e d x r a y absorption fine-structure ( E N A F S ) has been used t o determine b o n d lengths a n d coordination n u m b e r s around the central O s a t o m in b o n d i s o m e r i c hexakis (thioc y a n a t o i s o t h i o c y a n a t o ) o s m a t e s ( I I I ) [ O s ( N C S ) n ( S C N ) 6 w ] 3 ~ , n — 1 , . . . , 6 : T h e a b o v e assignm e n t o f the species with ...

The b l a c k b o a r d a r c h i t e c t u r e i s a p o w e r f u l e x p e r t systems a r c h i t e c t u r e . I t s main advantages a r e f l e x i b i l i t y o f c o n t r o l and i n t e g r a t i o n o f d i f f e r e n t k i n d s o f knowledge r e p r e s e n t a t i o n s and i n f e r e n c i n g t e c h n i q u e s . At our L a b o r a t o r i e s we b u i l t a b l a c k b o a r...

Both the four-point and the uniform cubic B-spline refinement (i.e. subdivision) schemes double the number of vertices of a closed-loop polygonal curve P and produce sequences of vertices fj and bj respectively. We proposed to analyze a subdivision scheme Js that blends the rules of these two refinement methods to produce vertices of the form vj=(1–s)fj+sbj. Iterative applications of Js yield a...

A n i n s t r u m e n t is d e s c r i b e d w h i c h p e r m i t s t h e m e a s u r e m e n t o f t h e q u a l i t y o f X r a y s i n t e r m s o f t h e h a l f v a l u e l a y e r ( H V L ) o f a s u i t a b l e f i l t e r m a t e r i a l . I t c o n s i s t s o f t w o i o n i z a t i o n c h a m b e r s a d j u s t a b l e i n v o l u m e , w h i c h a r e c o n n e c t e d i n o p p ...

T h e e l e c t r o n i c s p e c t r a o f a s e r i e s o f s u b s t i t u t e d 4 h y d r o x y p y r i d o n e s a r e c a l c u l a t e d b y t h e C N D O / C I m e t h o d . B e s t a g r e e m e n t b e t w e e n o b s e r v e d a n d c a l c u l a t e d t r a n s i t i o n e n e r g i e s i s o b t a i n e d w h e n t h e g e o m e t r y o f t h e p y r i d o n e f o r m i s a s s u m...

arsenic is an important environmental toxicant which is usually found in drinking water in inorganic form. the hypothesis tested in this investigation is; arsenic exposure causes neural tube defects (ntds) andthese defects of the central nervous system are more likely related to folate deficiency during fetal life. in this study, sodium arsenate was administered via intraperitoneal route at a r...