many mathematical models have been applied and developed for simulation of water and solute transport in irrigated agriculture. using a model, it should be first calibrated and validated for different regions. swap is a field scale model that simulates water, solute and heat movement in the soil profile. in this study, the swap model was evaluated for two years (2001 and 2002) on wheat in a sem...

در بحث امدادرسانی به مصدومان بلایای طبیعی و غیرطبیعی، هدف اصلی یک زنجیره این است که اقلام موردنیاز مانند آب مواد غذایی، دارویی، پناهگاه سایر ملزومات سریع‌ترین زمان ممکن در­دسترس قرار بگیرد تا از تعداد مرگ‌ومیر ناشی وقوع بلایا حد امکان کاسته شود؛ بنابراین طراحی توسعه اجرایی­کردن می‌تواند نقش مهم بزرگی دست­‌یافتن پاسخ مناسب ایفا کند. بارزترین تفاوت‌ها برخورد با ، غیرقابل‌پیش‌بینی‌­بودن تقاضا نظر ...

Class specialization is the most original feature of object orientation, but identifying it to subtyping leads to the well known covariance-contravariance controversy. Type safety requires contravariance while specialization needs covariance. This paper aims to precisely analyse this problem, to show how irreductible it is and the need for type errors. We show that many alternatives as multiple...

background: it has been demonstrated that performing a mock embryo transfer (et) significantly improves the pregnancy rate in ivf cycles. the mock et could be performed prior to the stimulation cycle or immediately before real et. the problem of the first procedure is the possibility of variation in the uterine position and or cervico�uterine angle. objective: the purpose of this study was to d...

Based on the notion of colored and absolute excedances introduced by Bagno and Garber we give an analogue of the derangement polynomials. We obtain some basic properties of these polynomials. Moreover, we define an excedance statistic for the affine Weyl groups of type B̃n, C̃n and D̃n and determine the generating functions of their distributions. This paper is inspired by one of Clark and Ehrenbo...

Résumé. La littérature s’est beaucoup intéressée à l’extraction de règles classiques (ou positives) et peu à l’extraction des règles négatives en raison essentiellement d’une part, du coût de calculs et d’autre part, du nombre prohibitif de règles redondantes et inintéressantes extraites. La démarche que nous avons retenue est de dégager les règles négatives lors de l’extraction des règles posi...