the main objective of this article is to present a comparative study of capital assets pricing models (capm) with extrapolating capital assets pricing models (x-capm) of companies admitted in tehran exchange market which is accomplished for the first time by investigators of this research in iran. accordingly, the statistical population under study of this research includes all companies admitt...

In present study, a three-step multi-objective optimization algorithm of cyclone separators is catered for the design objectives. First, the pressure drop (Dp) and collection efficiency (h) in a set of cyclone separators are numerically evaluated. Secondly, two meta models based on the evolved Group Method of Data Handling (GMDH) type neural networks are regarded to model the Dp and h as the re...

The authors’ approach offers a movement from statistical testing to statistical modeling for disease surveillance. Traditionally, statistical methods for surveillance tend to evolve from a hypothesis-testing framework, wherein one “detects” an outbreak (anomaly, cluster, etc.) as a “statistically significant” departure from a null hypothesis defined as the lack of an outbreak (e.g., constant ag...

Virtual 3D building models, as key elements of virtual 3D city models, are used in a growing number of application domains, such as geoanalysis, disaster management and architectural planning. Visualization systems for such building models often rely on perspective or orthogonal projections using a single viewpoint. Therefore, the exploration of a complete model requires a user to change the vi...

This paper will consider the spectrum of parametric cost models from cost estimating relationships (CER) to micro and finally macro-parametric models. This will lead to a description of the Family of Advanced Cost Estimating Tools (FACET) parametric suite of models and their top-down capability to estimate costs. One of the unique aspects of FACET is the utilisation of multi-colinearity. Typica...

Nevertheless, the persistence, and even deepening, in Sub-Saharan Africa of a type of small farming that is getting smaller all the time and that demonstrates an even greater orientation toward low-level subsistence than was the case 20 or 30 years ago should be of great concern to all those working on poverty reduction objectives in the continent. The dynamics of small farming in Africa are po...