نتایج جستجو برای: air quality index aqi
تعداد نتایج: 1286419 فیلتر نتایج به سال:
Accurate air quality index (AQI) forecasting makes a difference to public health, local economic development, and ecological environment. As typical geographical datum, the spatial autocorrelation (SAC) of AQI is often ignored, which may violate assumptions some models, such as machine learning requires variables be independent identically distributed. Considering strong SAC AQI, this study pro...
The effects of 9 precipitation events in Suzhou City Anhui Province, China, on the air quality index (AQI), PM2.5, and dry deposition flux PCDD/Fs (polydibenzo-p-dioxins polydibenzofurans) were investigated. A total 7 positive contributes to reduction AQI; among them, AQI between 23 216, with an average 75, PM2.5 concentrations 5.0 169 µg m–3, 25 while total- PCDD/F-TEQ ranged from 149 1034 pg ...
With the rapid development of economy and continuous improvement in people’s living standards, predictions air quality index have attracted wide attention. In this paper, a new feature selection method (Pearson-MI) combined model construction (modified inverse variance method) were proposed to study (AQI) its influencing factors Changchun. The Pearson-MI selects that affect AQI Changchun City f...
In view of the problems involved in remote sensing monitoring urban air quality, including low spatial resolution, only for a single pollutant, complex inversion algorithms, and difficultly obtaining parameter values, this study, new difference smog index (DSI) was developed, then comparison with normal haze index, MODIS aerosol optical depth products. The results show that DSI model developed ...
This paper adds the Air Quality Index (AQI) as an undesired output to green economy efficiency research framework. It uses super-efficiency SBM-DEA model analyze of provinces in China from 2014 2020. The study found that average economic under air pollution constraints showed a trend falling first and then rising, which indicates performance is not stable. Furthermore, overall synchronization e...
زمینه و هدف: غلظت و نوع آلاینده های ذره ای در جو، از عوامل اصلی در تغییر خردفیزیک و کلان فیزیک ابرها و بتبع آن تغییر در مقدار و کیفیت آب بارش می باشد. روش بررسی: در این مقاله بررسی موردی تاثیر آلودگی های ذره ای جو بر روی خردفیزیک ابر و کیفیت آب بارش در شهر تهران انجام گرفته است. رویداد مورد مطالعه در این مقاله (16/09/1391) بارشی است که قبل از وقوع آن بدلیل افزایش شاخص [1]AQI مربوط به ذرات معلق...
Exposure to air pollution can lead to pathological conditions such as anemia. The aim of the study was to assess the frequency of anemia in pregnant women exposed to different and substantial quantities of air pollutants. The subjects were pregnant women (n = 327), aged 20-30, non-smokers, in good physical condition, living for more then five years in Niš and Niška Banja and not exposed to harm...
Environmental monitoring systems deal with time-sensitive issues which require quick responses in emergency situations. Handling the sensor observations in near real-time and obtaining valuable information is challenging issues in these systems from a technical and scientific point of view. The ever-increasing population growth in urban areas has caused certain problems in developing countries,...
Air and soil pollution from mining activities has been considered as a critical issue to the health of living organisms. However, few efforts have been made in distinguishing the main pathway of organism genetic damage by heavy metals related to mining activities. Therefore, we investigated the genetic damage of Leymus chinensis leaf cells, the air particulate matter (PM) contents, and concentr...
The Rough Fire started on 31 July 2015 from a lightning strike, spread to over 61,000 ha and burned parts of the Sierra Sequoia National Forests & Kings Canyon Parks, in California. Health advisories for smoke were issued rural areas around fire urban Central Valley. PM2.5 concentrations used assess air quality impacts fire. Before Fire, 24-h all sites ranged 1 µg m?3o 50 µgm?3. During wild...
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