BACKGROUND The air quality index (AQI) is widely used to characterize the quality of ambient air. Chinese cities officially report the AQI on a daily basis. To assess the possible effects of air pollution on daily outpatient visits, we examined the association between AQI and the daily outpatient count. METHODS Daily data on outpatient visits to each clinical department were collected from th...

With the continuous progress of human production and life, air quality has become the focus of attention. In this paper, Beijing, Tianjin, Hebei, Shanxi, Shandong and Henan provinces were taken as the study area, where there are 58 air quality monitoring stations from which daily and monthly data are obtained. Firstly, the temporal characteristics of the air quality index (AQI) are explored. Th...

A linear regression model of particle pollution and an ordered logistic regression model of the relevant index were selected for observations in the US city of Los Angeles, California. Models were used to forecast Air Quality Index (AQI) from a sample, and were compared and contrasted. Methods are comparable overall but markedly different in their powers to predict certain categories. Linear re...

A series of anthraquinone-imide-based dimers, C5 -AQI-Si2, C5 -AQI-Si3, C5 -AQI-Si4, and C5 AQI-Si8, have been prepared by the hydrosilylation of N-(hex-5-enyl)-6-(40-((S)-2-methylbutoxy)phenyl)anthraquinone-2,3-dicarboxylic imide and hydride-terminated siloxanes with different lengths. Their liquid crystalline behaviors, and piezochromic and near-infrared electrochromic properties have been ch...

We locate winning strategies for various Σ3-games in the L-hierarchy in order to prove the following: THEOREM 1. KP +Σ2-Comprehension ` ∃αLα |=“Σ2-KP +Σ3-Determinacy .” Alternatively: Π3-CA0 `“there is a β-model of ∆ 1 3-CA0 + Σ 0 3Determinacy.” The implication is not reversible. (The antecedent here may be replaced with Π3(Π 1 3)-CA0: Π 1 3 instances of Comprehension with only Π3-lightface def...

The rapid industrial development has led to the intermittent outbreak of pm2.5 or haze in developing countries, which has brought about great environmental issues, especially in big cities such as Beijing and New Delhi. We investigated the factors and mechanisms of haze change and present a long-term prediction model of Beijing haze episodes using time series analysis. We construct a dynamic st...

To provide some useful information about the control of air pollution in China, we studied the spatial-temporal characteristics of air pollution in China from 2001-2014. First, we drew several line charts and histograms of the Air Pollution Index (API) and Air Quality Index (AQI) of 31 capital cities and municipalities to research the distribution across different times and cities; then, we res...

Air pollution indices are commonly used to indicate the level of severity of air pollution to the public. The Pollution Standards Index (PSI) was initially established in response to a dramatic increase in the number of people suffering respiratory irritation due to the deteriorating air quality. The PSI was subsequently revised and implemented by the USEPA in 1999, and became known as the Air ...

US EPA has included sub-indices of 8-hour average O3 concentration and 24-hour average PM2.5 level into a newly-modified Air Quality Index (AQI). Calculations at air-quality monitoring stations in Taiwan show that the updated AQI system is associated with two to three times higher occurring frequency of days with AQI larger than 100 than that of the widely used Pollution Standard Index (PSI) la...

Objective The objective of the study was to analyze the effect of environmental factors on the differential expression of microRNAs in the peripheral blood of migratory and local patients in northern People's Republic of China and on clinical symptoms of local patients in northern People's Republic of China with COPD. Methods A total of 118 patients in the northern region and 8 migratory pati...