This paper concerns semiparametric regression models with additive nonparametric components and high dimensional parametric components under sparsity assumptions. To achieve simultaneous model selection for both nonparametric and parametric parts, we introduce a penalty that combines the adaptive empirical L2-norms of the nonparametric component functions and the SCAD penalty on the coefficient...

Gasoline prices have significant effects on traffic safety. However, existing literature has failed to adequately investigate the effects: the literature has examined only fatal incidents rather than total traffic incidents. This study analyzes the effects of gasoline prices on total traffic incidents and on the incidents by age and gender. The results suggest that gasoline prices have negative...

In this study, the number of vehicles, fuel consumption, and emissions was estimated in two scenarios by using logistic model until 2050. The consumption estimations were studied three groups as diesel, LPG, gasoline. Also, diesel vehicles inspected passenger cars, light-duty, heavy-duty vehicles. annual mileage values average per 100 km have been calculated considering similar studies statisti...

In this paper, the use of gasoline combinations with ethanol and nano oxide particles has been studied in gasoline-based SI EF7 engines. The mixtures are prepared in five emulsions of gasoline with 10% ethanol, gasoline with 10% ethanol and 10ppm nano Mn2O3, gasoline with  10% ethanol and 20ppm nano Mn2O3, gasoline with 10% ethanol and 10ppm nano Co<s...

Hybrid electric vehicles are currently one of the most effective ways to increase efficiency and reduce pollutant emissions internal combustion engines. Green hydrogen, produced with renewable energies, is an excellent alternative fossil fuels in order drastically engine emissions. In this work, author proposes implementation a hydrogen-fueled hybrid vehicle; investigated powertrain power-split...

The demand for Electric Vehicles (EVs) has increased during the last years, especially after the peak oil prices experienced in the year 2008. In spite of, in general, EVs being associated to a cleaner and more efficient mobility, the benefits of substituting conventional Internal Combustion Vehicles (ICVs) by EVs must be evaluated. In this regard, in the present paper, it is compared the energ...

In the U.S., the regulatory approach to automobile fuel choices has consisted almost exclusively of mandated changes in autos and fuel availability. This contrasts with Europe, where di®erential taxes and fees have been used to encourage the use of unleaded gasoline and diesel fuel. I use data for 48 states from 1980 to 1989 to estimate the e®ect of price di®erences between leaded and unleaded ...

This paper analyzes the dynamics of U.S. automobile gasoline consumption since 1975. Using background literature on the history of domestic fuel economy and energy policy, I establish a conceptual model that explains historical trends in adoption of increased fuel economy. I then create a system dynamics simulation model to understand the relationship between increased fuel economy standards an...

The 2008/2009 world economic crisis had significant impact on oil and fuel markets. This crisis has been developed from the meltdown of the American mortgage and financial market and spread throughout the global economy. As each country reacted differently to the crisis, the changes in the fuel market have also shown significant geographic variation. In our present research, the changes of the ...

Introduction: what’s the speed limit? In 1973, the then United States President, Jimmy Carter, addressed the issue of declining petroleum resources and increasing automobile traffic by the institution of a rationing plan that mandated decreasing consumption fairly and equitably across the entire population of consumers. The national speed limit (NSL) decreased from 70 to 55 miles per hour, and,...