Objective Metropolitan area rail transit lines with different operating entities and different system modes differ in passenger capacity division and operating cost verification, and there is a need for differentiated pricing.In order to promote the integration of four networks (mainline railways, intercity railways, suburban railways, and urban ra

On one hand, the nuclear technologies led bar mat have a positive impact on sustainable development and security, but, on the other hand, they produce insecurity and bad prejudices on the sustainable development through the risks, threats and dangers which are presented in this paper.These technologies are used within nuclear military systems, as w

IntroductionOral leukoplakia is one of the most frequent oral potentially malignant disorders.The present study aims to compare serum vitamin D levels between patients with and without oral leukoplakia, by smoking habit.MethodsThis cross-sectional study involved a group of 45 cases with oral leukoplakia and a control group with 45 individuals.In bo

Ice flow velocity is a vital parameter for estimating the ice mass balance of glaciers in Antarctica.Especially long time serial observation of the surface velocity is of great significance to assessing the relationship between Antarctic ice materials and global climate change.However, the existing research on Antarctic ice velocity based on remote