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?? ?1. In this paper。。 $i!r> .Jo
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?? ?2. This paper proceeds as follow. x wwL
?? ?3. The structure of the paper is as follows. +`$$^x
?? ?4. In this paper, we shall first briefly introduce fuzzy sets and related concepts KP>1%ap6
?? ?5. To begin with we will provide a brief background on the tt6GtYrC 1
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?? ?1. This will be followed by a description of the fuzzy nature of the problem and a detailed presentation of how the required membership functions are defined. xwHE,ykE
?? ?2. Details on xx and xx are discussed in later sections. bcxR7<T,"9
?? ?3. In the next section, after a statement of the basic problem, various situations involving possibility knowledge are investigated: first, an entirely possibility model is proposed; then the cases of a fuzzy service time with stochastic arrivals and non fuzzy service rule is studied; lastly, fuzzy service rule are considered. VP~%,=
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?? ?1. This review is followed by an introduction. &t