نتایج جستجو برای: air quality index
تعداد نتایج: 1286336 فیلتر نتایج به سال:
In recent years, air pollution has become a serious threat, causing adverse health effects and millions of premature deaths in China. This study examines the spatial-temporal characteristics ambient quality five provinces (Shaanxi (SN), Xinjiang (XJ), Gansu (GS), Ningxia (NX), Qinghai (QH)) northwest China (NWC) from January 2015 to December 2018. For this purpose, surface-level aerosol polluta...
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...
چکیده مقدمه : پژوهش حاضر با هدف ترجمه و تعیین پایایی و روایی نسخه فارسی پرسشنامه ژنریک " شاخص کیفیت زندگی"(quality of life index) برای اندازه گیری کیفیت زندگی در ایران طراحی و انجام شد. روش : پس از اخذ اجازه از طراحان پرسشنامه ، بر اساس روش توصیه شده forward-backward، پرسشنامه مذکور ترجمه و در مطالعه ای آزمایشی به کار برده شد و پس از اعمال تغییرات لازم، پرسشنامه نهایی در بین 130 نفر از دانش...
Introduction and Purpose: Mashhad, one of the most populous cities in Iran, is facing air pollution due to motor vehicle emissions and industries. Therefore, this study aimed to evaluate the variations in Air Quality Index (AQI) during the spring of 2012-2014 and its spatial zoning with Arc GIS. Methods: In this descriptive study, the AQI values were calculated by the associ...
The air quality control is a challenging task, due to nonlinear processes that brings to pollution formation and accumulation in the troposphere. Control theory provides useful methodologies and tools to solve this problem. In this paper we propose a two-objective problem to control particulate matter exposure in the troposphere. The approach is based on the minimization of two objectives, name...
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