the purpose of this research is to investigate the relationship between earnings variabilityand earnings forecast using neural networks in companies listed on tehran stock exchange. theresearch is of the library and analytical-causal study type, and is based on panel data analysis andneural networks. in this research, financial information of 98 companies from 19 industries intehran stock excha...

Numerous published studies in the past 20 years clearly demonstrate that use of laboratory measurements to predict real-world attenuation for groups of workers, or even more problematically for individual workers, is fraught with inaccuracies. Thus, the ability to properly assign hearing protectors in critical high-noise environments or even for lower noise levels when one wishes to closely mat...

This paper focuses on modeling ride requests and their variations over location and time, based on analyzing extensive real-world data from a ride-sharing service. We introduce a graph model that captures the spatial and temporal variability of ride requests and the potentials for ride pooling. We discover these ride request graphs exhibit a well known property called “densification power law” ...

the aim of this study was to evaluate the variability of tavanmand engineering firm, due to instrumental changing in the way of control equipment from manually install to technical.  in this way, the theoretical literature review explores change management and resistance to change and methodology is based on quantitative data collection and analysis. the results of data analysis indicate that t...