scholarly journals Study on Evaluation Models of Highway Safety Based on Catastrophe Theory

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Hezheng Bi ◽  
Linjun Lu ◽  
Jian Lu ◽  
Chen Wang
Keyword(s):  
Catastrophe Theory ◽  
Evaluation Method ◽  
Safety Evaluation ◽  
Mortality Rates ◽  
Video Data ◽  
Safety Index ◽  
Safety Level ◽  
Relative Safety ◽  
Highly Correlated ◽  
General Safety

Evaluating safety performance of first-class highways in China is important due to their high mortality rates. Traditional models for statistical crash prediction and traffic conflict techniques require long periods of data collection which is time-consuming and labor-intensive. This paper introduces a safety evaluation method based on catastrophe theory for highways in China. The method firstly divides the highway into multiple road sections and uses video-based road detection (VRD) system to collect video data of existing road conditions. Then, experienced drivers and experts are invited to watch the collected videos to establish a multilayer safety index system and assign values to bottom indexes. By applying catastrophe theory, a general safety index is derived, which indicates the relative safety level of a road section. Finally, all road sections can be ranked based on the general safety index. A case study shows encouraging results where (1) the safety index is highly correlated with real mortality rates and (2) the safety index successfully identifies most dangerous road sections. The proposed method can be considered as a promising supplementary safety evaluation method that could help traffic engineers to better understand safety implications of first-class highways in China.

Research to Health Diagnose Model of Gate and Hoist Machinery Based on AHP

2011 ◽  
Vol 287-290 ◽  
pp. 3036-3042 ◽  
Author(s):  
Guang Ming Yang ◽  
Wen Bin Jia
Keyword(s):  
Evaluation Method ◽  
Safety Evaluation ◽  
Metal Structure ◽  
Weight Coefficient ◽  
Diagnostic Model ◽  
Ahp Method ◽  
Safety Level ◽  
Comprehensive Health ◽  
Expert Evaluation Method ◽  
Health Diagnosis

Safety evaluation index is a fundamental and key element in composing hydraulic metal structure healthy diagnostic model, however,the determination of weighting of Indexes is closely related to the reasonability and reliability of the whole evaluation result.Based on the safety level, importance and expertise of the main factors on hydraulic metal structure,we also combine integration of AHP method of nine marks and expert evaluation method to determine the weight coefficient of each index, the comprehensive health diagnosis of gates and hoists based on AHP method are first constructed in line with scientific and rational principles .And we use the model to achieve the specific project safety evaluation of hydraulic metal structures, also comparing it with the traditional comparative analysis, proving the comprehensive health diagnosis based on AHP model to be a more scientific, reasonable and reliable one.

scholarly journals Construction of Safety Evaluation System of Jacking Form Work System Based on Human Factor Theory

2021 ◽  
Vol 248 ◽  
pp. 03072
Author(s):  
Shilong Jia ◽  
Yu Wang ◽  
Zhaofeng Zhang
Keyword(s):  
Evaluation System ◽  
Evaluation Method ◽  
Safety Management ◽  
Comprehensive Evaluation ◽  
Real Life ◽  
Safety Evaluation ◽  
Construction Safety ◽  
Fuzzy Evaluation ◽  
Safety Level ◽  
Life Project

The jacking form work is a complex system of construction environment, which is extremely important for human factors control. Establishing a harmonious man-machine-environment relationship is of great help to reduce the construction risk of jacking form work. This paper will establish the evaluation indicators which affecting man-machine-environment system balance. Then the AHP-Fuzzy evaluation method was used to carry out comprehensive evaluation. Finally, the real-life project was taken as an example to evaluate the construction safety level. The result can provide an important direction for construction safety management.

The Comprehensive Safety Evaluation Method on the Safety Situation of Iron Mine Based on AHP and Extension Theory

2012 ◽  
Vol 616-618 ◽  
pp. 208-212 ◽  
Author(s):  
Feng Wang ◽  
Tie Jun Cui
Keyword(s):  
Evaluation Method ◽  
Safety Data ◽  
Safety Evaluation ◽  
Influential Factors ◽  
Extension Theory ◽  
Evaluation Index System ◽  
Engineering Method ◽  
Mine Safety ◽  
Safety Level ◽  
Iron Mine

To solve the qualitative and quantitative problems in safety evaluation, we employ the professional knowledge of extension engineering method, analytic hierarchy process (AHP) and relevant iron mine safety evaluation index system, combined with extension engineering method and regional safety assessment to establish the matter-element model of safety evaluation analysis on iron mine safety based on extension theory. Based on the safety data of iron mines, we further analyze the influential factors of the regional safety. Firstly, these influential factors are divided into two levels based on AHP, and then the weights of two layers index are calculated respectively. Secondly, with scores measured by experts, the safety level of the influencing factors is determined based on extension theory. Finally, given the weight and safety level of the influence factors mentioned above, the safety conditions of iron mine is determined accordingly. The results of the study show that this analysis based on AHP-the extension engineering method absorb the essence of the traditional evaluation method, and minimize the defects of the various methods. The method can accurately evaluate safety level of iron mine, measure the distance between the actual safety level and adjacent safety level, and better reflect iron mine safety situation. It is of certain significance for the classification of safety situation. The method also has a broad application prospects in other engineering fields.

Research on Oil Depot Safety Evaluation Based on Dow Chemical Fire and Explosion Index Assessment Method

2013 ◽  
Vol 748 ◽  
pp. 1256-1261
Author(s):  
Shou Hui He ◽  
Han Hua Zhu ◽  
Shi Dong Fan ◽  
Quan Wen
Keyword(s):  
Production Management ◽  
Evaluation Method ◽  
Risk Index ◽  
Safety Evaluation ◽  
Assessment Method ◽  
Theoretical Ground ◽  
Potential Hazard ◽  
Process Unit ◽  
Safety Production ◽  
Fire And Explosion

At the present time, the Dow Chemical Fire and Explosion Index (F&EI) is a kind of risk index evaluation method that is comprehensively used in evaluating potential hazard, area of exposure, expected losses in case of fire and explosion, etc. As the research object to oil depot storage tank area, this article ultimately confirms establishing appropriate pattern of process unit as well as reasonable safety precautions compensating method, in order to insure the reasonableness of evaluating result, by means of selecting process unit, confirming material factor and compensating safety precautions, using F&EI method. This can provide the basis for theoretical ground in aspect of oil depot development and safety production management.

scholarly journals Study on ecological safety evaluation method for pyrolysis residue of oily sludge

2021 ◽  
Vol 651 (4) ◽  
pp. 042058
Author(s):  
Xuan Sun ◽  
Zhiqiang Guo ◽  
Faguo Zhong ◽  
Zhibin Wu ◽  
Penghui Yang ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Safety Evaluation ◽  
Oily Sludge ◽  
Ecological Safety ◽  
Pyrolysis Residue

Analysis of the Safety Factors of Municipal Road Undercrossing Existing Bridge Based on Fuzzy Analytic Hierarchy Process Methods

2021 ◽  
pp. 036119812110318
Author(s):  
Yonghong Yang ◽  
Yu Chen ◽  
Zude Tang
Keyword(s):  
Safety Assessment ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Safety Evaluation ◽  
Safety Factors ◽  
Analytic Hierarchy ◽  
Road Engineering ◽  
Existing Bridges ◽  
Hierarchy Process ◽  
Engineering Projects

Increasing traffic volume and insufficient road lanes often require municipal roads to be reconstructed and expanded. Where a road passes under a bridge, the reconstruction and expansion project will inevitably have an impact on the bridge. To evaluate the safety impact of road engineering projects on bridges, this paper evaluates the safety of the roads and ancillary facilities of highway bridges involved in municipal road engineering projects. Based on a comprehensive analysis of the safety factors of municipal roads undercrossing existing bridges, a fuzzy comprehensive analytic hierarchy process (AHP) evaluation method for the influence of road construction on the safety of existing bridges is proposed. First, AHP is used to select 11 evaluation factors. Second, the target layer, criterion layer, and index layer of evaluation factors are established, then a safety evaluation factor system is formed. The three-scale AHP model is used to determine the weight of assessment indexes. Third, through the fuzzy comprehensive AHP evaluation model, the fuzzy hierarchical comprehensive evaluation is carried out for the safety assessment index system. Finally, the fuzzy comprehensive evaluation method is applied to the engineering example of a municipal road undercrossing an existing expressway bridge. The comprehensive safety evaluation of the existing bridge reflects the practicability and feasibility of the method. It is expected that, with further development, the method will improve the decision-making process in bridge safety assessment systems.

Research on Mine Gas Accident Multi-Factor Fuzzy Comprehensive Safety Evaluation

2014 ◽  
Vol 955-959 ◽  
pp. 1868-1872
Author(s):  
Wei Liu ◽  
Xiao Hong Chen ◽  
Jun Wang
Keyword(s):  
Coal Mine ◽  
Comprehensive Evaluation ◽  
Safety Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Weight Vector ◽  
Relationship Matrix ◽  
Safety Level ◽  
Coal Mine Gas ◽  
Mine Gas ◽  
Safety Investment

Gas accident is one of the most common accidents in coal mine in china. This paper argues that the gas dangerousness is determined by many factors which are difficult to quantitative risk, and deems these factors are quantified and fuzzy comprehensive evaluation, comprehensive evaluation, which are benefit evaluation and master the coal mine’s gas safety level, and determine the safety investment direction and improve the benefit of safety investment that will reduce the coal mine gas occurrence probability, so as to reduce and avoid the happening of coal mine gas accident. The basic steps: first, to analyze and master all kinds of gas accident reasons; Second, to determine the assemble of the gas risk factors evaluation, determine the evaluation grade assemble; Third, to proceed the single factor evaluation, determine fuzzy relationship matrix and the fuzzy weight vector of evaluation factor, and to choose the appropriate composition operator, vector analysis with the result of fuzzy comprehensive evaluation; Finally, people will take corresponding measures to prevent according to the result of evaluation that shows safety weaknesses.

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