in the open-pit mining, one of the first decisions that must be made in production planning stage, after completing the design of final pit limits, is determining of the processing plant cut-off grade. since this grade has an essential effect on operations, choosing the optimum cut-off grade is of considerable importance. different goals may be used for determining optimum cut-off grade. one of...

Different types of inexactness can be represented by fuzzy sets: vagueness, where there are no precise boundaries, ambiguity, when more than one distinguishable concept is described, generality, such that a word applies to a variety of situations, and ambivalence, where conflicting valuations can coexist. Different measures of ignorance can be used in order to grade the distinct attributes of i...

Fuzzy tree automata are mathematical devices for modeling and analyzing vaguely defined structures. The behavior of a fuzzy automaton generates language by mapping set regular trees on ranked alphabet to membership values. It calculates the grade using rules that process their structural characteristics. This paper deals with constructing models satisfies given logical propositions (called prop...

Numeracy Learning activities after the Covid-19 Pandemic has been decline in quality of learning a number elementary school students. This research is limited to numeracy for low grade students, namely 1,2, and 3, because basic concept numeration begins with grades There are several factors that make difficult students understand numeracy, often forget about concepts have taught before. An Effe...

Some specific methods with applications in biology, ecology and related natural sciences will be presented. The stress will be on less known methods with a wide potential in applications. In the first part, correspondences between two sets will be considered as a tool for investigating various connections among their elements. One of the sets is called the set of objects and another is the set ...

To characterize the hydraulic fracture network of a conglomerate reservoir, slant core well was drilled aimed to obtain direct information regarding fractures through at fracturing test site (CHFTS). Core classification fundamental issue project. In this study, three grade classifications for were proposed. Comprehensive carried out using analytic hierarchy process (AHP)–fuzzy comprehensive eva...

introduction: studies have indicated a global high prevalence of hospital malnutrition on admission and during hospitalization. clinical nutritional risk screen (cnrs) is a way to identify malnutrition and manage nutritional interventions. several traditional and non-computer based tools have been suggested for screening nutritional risk levels. the present study was an attempt to employ a comp...