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Article
Publication date: 23 February 2015

Jinxi Wang, Hongya Niu, Pei Ling, Jingsen Fan, Kunli Luo, Maxim Blokhin and Yuzhuang Sun

Numerous smog events have occurred in recent years in China. Their hazards in mining and industrial cities are more serious than clear days. The samples were collected in the…

Abstract

Numerous smog events have occurred in recent years in China. Their hazards in mining and industrial cities are more serious than clear days. The samples were collected in the mining and industrial city of Handan. During the smog episode, PM10 and PM2.5 concentrations reach up to 980 μg/m3 and 660 μg/m3, respectively. Under SEM (scanning electron microscope) analysis, the particles consist of soot, fly ash and minerals, which could be from coal mines, power plants, steel mills and auto exhausts. Compared with the samples collected on a clear day, the increased PM10 particles are mainly composed of organic matter, especially aromatic compounds. The Pb content in PM10 of the smog day reaches 507.4 ng/m3 and could be caused by vehicle emissions.

Details

World Journal of Engineering, vol. 11 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 23 August 2015

Guimei Wang, Shaohua Jin, Buqin Zhang, Fugui Yang and Xiaoli Ji

The coal reserves overlain by buildings, water bodies and railways are estimated to be about 14 billion tons in China. Based on the concept of green mining, in order to save the…

Abstract

The coal reserves overlain by buildings, water bodies and railways are estimated to be about 14 billion tons in China. Based on the concept of green mining, in order to save the unit energy, Double pumps in parallel forms of pumping are adopted in 0the paste filling of the pumping system. The optimal solution of the objective function could be obtained by taking the unit flow power of the pumping system as the objective function, using the quadratic polynomial by the least square method curve fitting and by the application of MATLAB. Thereby it is possible to reduce power consumption and increase the efficiency of the operating economy in the paste filling station.

Details

World Journal of Engineering, vol. 12 no. 3
Type: Research Article
ISSN: 1708-5284

Keywords

Book part
Publication date: 1 August 2019

Al-Muttar Mohammed Yousif Oudah

The chapter dwells on barriers for restoration and development of country's infrastructure on the platform of individual physical and practical forces, which are peculiar for the…

Abstract

The chapter dwells on barriers for restoration and development of country's infrastructure on the platform of individual physical and practical forces, which are peculiar for the states with developing and transitional economy, as well as for developed countries. Directions of formation of the organizational model of restoration and development of country's infrastructure on the platform of individual physical and practical forces are presented; forms of public–private partnership are studied, as well as possibilities of financing. An important aspect is finding the mechanisms of leveling the risks according to the given classification. A mechanism of organizational model of controlling development of country's infrastructure and its structural elements are provided.

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