The present study was performed to determine the relationship vaginal bleeding in first half of pregnancy and fate of pregnancy in referrals of teaching hospitals of Tehran University of Medical Sciences during the years 1993-1994. The case-control strategy of this study was carried out on 432 patients. In this respect, 216 ( case group) out of them had vaginal bleeding during the first half o...

it is firstly proved that the multi-input-single-output (miso) fuzzy systems based on interval-valued $r$- and $s$-implications can approximate any continuous function defined on a compact set to arbitrary accuracy.  a formula to compute the lower upper bounds on the number  of interval-valued fuzzy sets needed to achieve a pre-specified approximation  accuracy for an arbitrary multivariate con...