In wireless channel the noise has a zero mean. This channel property can be used in the enhancement of the noise performance in the digital receivers by oversampling the received signal and calculating the decision variable based on the time average of more than one sample of the received signal. The averaging process will reduce the effect of the noise in the decision variable that will approa...

Variable precision reduction (VPR) and positive region (PRR) are common definitions in attribute reduction. The compacted decision table is an extension of a table. In this paper, we propose another extension, called the weighted both types tables, VPR defined, corresponding discernibility matrices for PRR proposed. Then, algorithms obtaining from presented. relationship between established by ...

this study aims to consider the relationships between job fatigue, organizational citizenship behavior and organizational atmosphere. the evaluation of each variable is a kind of decision making problem which has systematic transaction between variables. so, decision making trial and evaluation laboratory (dematel) is suitable for defining the cause and effect relationships between variables. w...

In assessing the relative efficiency of decision-maker units by classical Data Envelopment Analysis (DEA) models, the status of the data is determined from the input or output points of views. In real issues, there are some data whose statuses are debatable. Some decision making units consider them as input to achieve higher efficiency while some other decision making units consider them ...

Recently, a multigranulation rough set (MGRS) has become a new direction in rough set theory, which is different from the Pawlake’s rough set since the former takes multiple granulations on the universe into account. In this paper, by analyzing the limitations of optimistic multigranulation rough set (OMGRS) and pessimistic multigranulation rough set (PMGRS) in incomplete information system, th...