The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Zhikai Cui - One of the best experts on this subject based on the ideXlab platform.
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A novel Hazard Assessment method for biomass gasification stations based on extended set pair analysis.
PloS one, 2017Co-Authors: Fang Yan, Zhikai CuiAbstract:Biomass gasification stations are facing many Hazard factors, therefore, it is necessary to make Hazard Assessment for them. In this study, a novel Hazard Assessment method called extended set pair analysis (ESPA) is proposed based on set pair analysis (SPA). However, the calculation of the connection degree (CD) requires the classification of Hazard grades and their corresponding thresholds using SPA for the Hazard Assessment. In regard to the Hazard Assessment using ESPA, a novel calculation algorithm of the CD is worked out when Hazard grades and their corresponding thresholds are unknown. Then the CD can be converted into Euclidean distance (ED) by a simple and concise calculation, and the Hazard of each sample will be ranked based on the value of ED. In this paper, six biomass gasification stations are introduced to make Hazard Assessment using ESPA and general set pair analysis (GSPA), respectively. By the comparison of Hazard Assessment results obtained from ESPA and GSPA, the availability and validity of ESPA can be proved in the Hazard Assessment for biomass gasification stations. Meanwhile, the reasonability of ESPA is also justified by the sensitivity analysis of Hazard Assessment results obtained by ESPA and GSPA.
Fang Yan - One of the best experts on this subject based on the ideXlab platform.
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A novel Hazard Assessment method for biomass gasification stations based on extended set pair analysis.
PloS one, 2017Co-Authors: Fang Yan, Zhikai CuiAbstract:Biomass gasification stations are facing many Hazard factors, therefore, it is necessary to make Hazard Assessment for them. In this study, a novel Hazard Assessment method called extended set pair analysis (ESPA) is proposed based on set pair analysis (SPA). However, the calculation of the connection degree (CD) requires the classification of Hazard grades and their corresponding thresholds using SPA for the Hazard Assessment. In regard to the Hazard Assessment using ESPA, a novel calculation algorithm of the CD is worked out when Hazard grades and their corresponding thresholds are unknown. Then the CD can be converted into Euclidean distance (ED) by a simple and concise calculation, and the Hazard of each sample will be ranked based on the value of ED. In this paper, six biomass gasification stations are introduced to make Hazard Assessment using ESPA and general set pair analysis (GSPA), respectively. By the comparison of Hazard Assessment results obtained from ESPA and GSPA, the availability and validity of ESPA can be proved in the Hazard Assessment for biomass gasification stations. Meanwhile, the reasonability of ESPA is also justified by the sensitivity analysis of Hazard Assessment results obtained by ESPA and GSPA.
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Hazard Assessment for Biomass Gasification Station Using General Set Pair Analysis
BioResources, 2016Co-Authors: Fang Yan, Xiumin ZhangAbstract:Hazard Assessment is critical for a biomass gasification station because it includes various Hazardous factors. Set pair analysis (SPA) is a convenient and effective method for Hazard Assessment, but it has limitations, including (1) the inability to reflect the difference when the data belong to the same Hazard grade and (2) the Assessment results lack precision and accuracy. This study proposes an improved method designated as general set pair analysis (GSPA). Connection measure degree (CMD), which is based on the cosine function, as well as weighting deviation degree (WDD), relative membership degree (RMD), and comprehensive index (CI) were proposed in GSPA, and the algorithms were generated. The calculated results of these different methods can be utilized to overcome the shortcomings of SPA during Hazard Assessment. A case study of two biomass gasification stations in Shenyang City, Liaoning Province, Northeast China, was performed. The Hazard Assessment results of the GSPA were compared with those of SPA. The results showed that GSPA is a more effective, precise, and accurate method for Hazard Assessment of a biomass gasification station.
G.r. Dargahi-noubary - One of the best experts on this subject based on the ideXlab platform.
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Earthquake Hazard Assessment based on bivariate exponential distributions
Reliability Engineering & System Safety, 1994Co-Authors: G.r. Dargahi-noubary, Mehdi RazzaghiAbstract:Abstract The use of the bivariate exponential distribution in Hazard Assessment, with particular reference to seismic events is considered. A brief review of various bivariate exponential distributions is first given and an argument is presented for selection of the most appropriate model for earthquake Hazard Assessment. Dependency between the intensity and the time between the earthquakes in a given region is investigated. It is shown that ignoring the dependency (when it exists) results in, respectively, overestimation and underestimation of seismic Hazard according to whether earthquakes occur as quasi-periodic (rhythmic) quakes or in clusters. Several examples using real data are given to provide further illustration of the application of the model.
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Flood Hazard Assessment based on the theory of outstanding values
Reliability Engineering & System Safety, 1992Co-Authors: G.r. Dargahi-noubaryAbstract:Abstract Some basic results of a theory for the analysis of outstanding values or records is reviewed. The general aspects appropriate for Hazard Assessment are discussed, and then, in view of the peaks over threshold method (partial duration series) for flood frequency analysis, results relevant to flood Hazard Assessment are studied. The discussion is concluded with an example of application, and some comparisons with classical methods.
Wang Gonghui - One of the best experts on this subject based on the ideXlab platform.
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GIS-based landslide Hazard Assessment: An overview
Progress in Physical Geography, 2005Co-Authors: Wang Huabin, Liu Gangjun, Xu Weiya, Wang GonghuiAbstract:In recent years, landslide Hazard Assessment has played an important\nrole in developing land utilization regulations aimed at minimizing\nthe loss of lives and damage to property. A variety of approaches\nhas been used in landslide Assessment and these can be classified\ninto qualitative factor overlay, statistical models, geotechnical\nprocess models, etc. However, there is little work on the satisfactory\nintegration of these models with geographic information systems (GIS)\nto support slope management and landslide Hazard mitigation. This\npaper deals with several aspects of landslide Hazard Assessment by\npresenting a focused review of GIS-based landslide Hazard Assessment:\nit starts with a framework for GIS-based Assessment of landslide\nHazard; continues with a critical review of the state of the art\nin using GIS and digital elevation models (DEM) for mapping and modelling\nlandslide Hazards; and concludes with a description of an integrated\nsystem for effective landslide Hazard Assessment and zonation incorporating\nartificial intelligence and data mining technology in a GIS-based\nframework of knowledge discovery.
Soner Ocak - One of the best experts on this subject based on the ideXlab platform.
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Probabilistic seismic Hazard Assessment of Eastern Marmara Region
Bulletin of Earthquake Engineering, 2013Co-Authors: Zeynep Gülerce, Soner OcakAbstract:The objective of this study is to evaluate the seismic Hazard in Eastern Marmara Region using an improved probabilistic seismic Hazard Assessment methodology. Two significant improvements over the previous seismic Hazard Assessment practices are accomplished in this study: advanced seismic source characterization models in terms of source geometry and recurrence relationships are developed, and improved global ground motion models (NGA-W1 models) are employed to represent the ground motion variability. Planar fault segments are defined and a composite magnitude distribution model is used for all seismic sources in the region to properly represent the characteristic behavior of the North Anatolian Fault without the need for an additional background zone. Multi-segment ruptures are considered using the rupture model proposed by the Working Group on California Earthquake Probabilities ( 2003 ). Events in the earthquake catalogue are attributed to the fault zones and scenario weights are determined by releasing the accumulated seismic energy. The uniform Hazard spectra at 10 % probability of exceedance in 50 years Hazard level for different soil conditions (soil and rock) are revealed for specific locations in the region (Adapazarı, Düzce, Gemlik, Izmit, Iznik and Sapanca). Hazard maps of the region for rock site conditions at the selected Hazard levels are provided to allow the readers perform site-specific Hazard Assessment and develop site-specific design spectrum for local site conditions.
