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The identification and assessment of project risks among potential risks can be considered a multi-attribute group decision making (MAGDM) problem including both quantitative and qualitative criteria. We extend the concept of safety to risk identification and assessment; this is to emphasize that the focus should not only be on the time and cost criteria, but also on the health, safety and environment (HSE) criterion. Conventional approaches to risk identification and risk assessment separately tend to be less effective in dealing with the imprecise of the risk assessment individually. The aim of this paper is to present a new methodology for identifying and assessing risks simultaneously by applying MAGDM technique. This paper includes a new procedure for classifying potential risks which it is named potential risk breakdown structure (PRBS) based on project work breakdown structure (WBS). Nominal group technique (NGT) is utilized for gathering potential risks. Obtained results have been applied in gas refinery plant construction successfully. 相似文献
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Shima Ziajahromi Meysam Khanizadeh Farhad Nejadkoorki 《Environmental monitoring and assessment》2014,186(3):1907-1915
The current work reports the activity concentrations of several natural radionuclides (226Ra, 232Th, and 40K) in Khak-Sefid area of Ramsar, Iran. An evaluation of total effective dose equivalent (TEDE) from exposure to high-level natural radiations is also presented. Soil samples were analyzed using a high-purity germanium detector with 80 % relative efficiency. The TEDE was calculated on a land area of 40,000 m2 with 1.5-m thickness of contaminated zone for the member of three critical groups of farmer, construction worker, and resident using Residual Radioactive Material Guidelines (RESRAD) modeling program. It was found that the mean activity concentrations (in Bq/kg) were 23,118?±?468, 25.8?±?2.3, and 402.6?±?16.5 for 226Ra, 232Th, and 40K, respectively. The maximum calculated TEDE during 1,000 years was 107.1 mSv/year at year 90, 92.42 mSv/year at year 88, and 22.09 mSv/year at year 46 for farmer, resident, and construction worker scenarios, respectively. The maximum TEDE in farmer scenario can be reduced to the level below the dose limit of 1 mSv/year which is safe for public health using soil cover with thickness of 50 cm or more on the contaminated zone. According to RESRAD prediction, the TEDE received by individuals for all exposure scenarios considerably exceed the set dose limit, and it is mainly due to 226Ra. 相似文献
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Zounemat-Kermani Mohammad Alizamir Meysam Keshtegar Behrooz Batelaan Okke Hinkelmann Reinhard 《Environmental science and pollution research international》2022,29(14):20556-20570
Environmental Science and Pollution Research - This study evaluates the potential of kriging-based (kriging and kriging-logistic) and machine learning models (MARS, GBRT, and ANN) in predicting the... 相似文献
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Ehteram Mohammad Ahmed Ali Najah Latif Sarmad Dashti Huang Yuk Feng Alizamir Meysam Kisi Ozgur Mert Cihan El-Shafie Ahmed 《Environmental science and pollution research international》2021,28(2):1596-1611
Environmental Science and Pollution Research - There is a need to develop an accurate and reliable model for predicting suspended sediment load (SSL) because of its complexity and difficulty in... 相似文献
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Meysam?Fazeli Mirmosadegh?JamaliEmail author Gregory?A.?Lawrence Brian?Seymour 《Environmental Fluid Mechanics》2016,16(2):401-412
The resonant interaction of surface and internal waves produces a nonlinear mechanism for energy transfer among wave components in oceans, lakes, and estuaries. In many field situations, the stratification may be well approximated by a two-layer fluid with a diffuse interface. The growth and damping rates of sub-harmonic interfacial waves generated by a surface wave through a three-wave resonant interaction are measured in the laboratory. These measurements are compared with theoretical predictions. A diffuse interface reduces the damping rate and increases the growth rate. The predicted growth rate provides excellent comparison with the laboratory measurements. The inclusion of the effects of a diffuse interface significantly improve the comparison. 相似文献
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Samani Saeideh Vadiati Meysam Nejatijahromi Zohre Etebari Behrooz Kisi Ozgur 《Environmental science and pollution research international》2023,30(9):22863-22884
Environmental Science and Pollution Research - Due to its heterogeneous and complex nature, groundwater modeling needs great effort to quantify the aquifer, a crucial tool for policymakers and... 相似文献
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