Suchergebnisse

Effective determination of trends in sulfur dioxide emissions facilitates national efforts to draft an appropriate policy that aims to lower sulfur dioxide emissions, which is essential for reducing atmospheric pollution. However, to reflect the current situation, a favorable emission reduction policy should be based on updated information. Various forecasting methods have been developed, but their applications are often limited by insufficient data. Grey system theory is one potential approach for analyzing small data sets. In this study, an improved modeling procedure based on the grey system theory and the mega-trend-diffusion technique is proposed to forecast sulfur dioxide emissions in China. Compared with the results obtained by the support vector regression and the radial basis function network, the experimental results indicate that the proposed procedure can effectively handle forecasting problems involving small data sets. In addition, the forecast predicts a steady decline in China&rsquo ; s sulfur dioxide emissions. These findings can be used by the Chinese government to determine whether its current policy to reduce sulfur dioxide emissions is appropriate.

Effective determination of trends in sulfur dioxide emissions facilitates national efforts to draft an appropriate policy that aims to lower sulfur dioxide emissions, which is essential for reducing atmospheric pollution. However, to reflect the current situation, a favorable emission reduction policy should be based on updated information. Various forecasting methods have been developed, but their applications are often limited by insufficient data. Grey system theory is one potential approach for analyzing small data sets. In this study, an improved modeling procedure based on the grey system theory and the mega-trend-diffusion technique is proposed to forecast sulfur dioxide emissions in China. Compared with the results obtained by the support vector regression and the radial basis function network, the experimental results indicate that the proposed procedure can effectively handle forecasting problems involving small data sets. In addition, the forecast predicts a steady decline in China's sulfur dioxide emissions. These findings can be used by the Chinese government to determine whether its current policy to reduce sulfur dioxide emissions is appropriate.

ObjectiveWith the emergence of rapid urbanization and the increase in per capita income, migration in China has been changing from economy‐driven to amenity‐driven. We seek to investigate the relation between land urbanization, urban amenities, and population urbanization by analyzing urban amenities in the analytical framework of land urbanization and population urbanization in China.MethodsUsing panel data of 277 cities in China from 2009 to 2018, we first employ the principal component analysis to calculate urban amenities and then conduct panel threshold model regressions.ResultsLand urbanization has a positive effect on urban amenities at the individual city level, while urban amenities have a negative effect on population urbanization in both large and small–medium cities. Reforming the household registration system has effectively improved the accessibility of urban amenities for high‐skilled labors in large cities. Thus, amenities in large cities have a positive effect on the urbanization of high‐skilled labors. In contrast, amenities in small–medium cities have a threshold effect on population urbanization.ConclusionAmenities in large and small–medium cities, which are located in the same urban agglomerations, could be coordinated and improved, thus achieving a long‐term sustainable and coordinated development of land and population urbanization.

Qing Shao,1,2,* Wei Quan,1,2,* Xiaoni Jia,1 Jianbo Chen,1 Shanbo Ma,3 Xiaohong Zhang11Xi'an Mental Health Center, Institute of Mental Health, Xi'an Medical University, Xi'an, Shaanxi, People's Republic of China; 2Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China; 3Department of Pharmacy, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China*These authors contributed equally to this workAbstract: Psychotropic medications have been known to cause cardiac conduction disturbances. Not much is known about the cardiovascular side effects of newer atypical antipsychotics such as aripiprazole. A case of a 13-year-old girl with schizophrenia is presented. An analysis of the presented patient's clinical history indicates the need for a detailed analysis of the severe arrhythmia induced by aripiprazole. This presented case report contains valuable guidelines that can be of assistance in the treatment of patients with aripiprazole.Keywords: schizophrenia, aripiprazole, arrhythmia, antipsychotics