Evidence for associations between spatial skills and mathematics has led to the argument that visualization plays a role in mathematical calculation. However, there is no single accepted definition of what encompasses. Here, we investigated context mental imagery framework. We applied component model imagery, involving image generation, maintenance, transformation (measured using rotation), sca...

Hydroxyl value is a fundamental characterization number that extensively applicable in polymer science. The American Society for Testing and Materials (ASTM) has described several methods to determine the hydroxyl value. However, routinely practiced ASTM method requires noxious chemicals involves laborious procedure this study based on reaction of p‐toluenesulfonyl isocyanate polyol, followed b...

Land surface curvature (LSC) is a basic attribute of topography and influences local effects gravitational energy material transport. However, the calculation LSCs based on triangulated irregular networks (TINs) has not been fully studied, which restricts further geoscience studies TIN digital elevation models (DEMs). The triangular facets vertices are both expressions land surface; therefore, ...

Using big data to promote economic development, improve social governance, and service regulatory capabilities is becoming a trend. However, the current cloud computing for processing has been difficult meet demand, server pressure increased dramatically, so people pay special attention integration of fog computing. In order make application people’s needs, we have established relevant mathemat...

Abstract The development of tourism promotes the rapid regional economy. Balancing relationship between investment and income is important, which affects speed economic development. Based on background economy, to a specific mode tourism, first step collect information, for coupling analysis subsystems industry economy synergy, through index differential mathematical equations finite element ca...

The importance of estimating sample sizes is rarely understood by researchers, when planning a study. This paper aims to highlight the centrality of sample size estimations in health research. Examples that help in understanding the basic concepts involved in their calculation are presented. The scenarios covered are based more on the epidemiological reasoning and less on mathematical formulae....