Abstract
Aiming to solve the safety problems of high-speed railway operation and management, one new method is urgently needed to construct on the basis of the rough set theory and the uncertainty measurement theory. The method should carefully consider every factor of high-speed railway operation that realizes the measurement indexes of its safety operation. After analyzing the factors that influence high-speed railway safety operation in detail, a rough measurement model is finally constructed to describe the operation process. Based on the above considerations, this paper redistricts the safety influence factors of high-speed railway operation as 16 measurement indexes which include staff index, vehicle index, equipment index and environment. And the paper also provides another reasonable and effective theoretical method to solve the safety problems of multiple attribute measurement in high-speed railway operation. As while as analyzing the operation data of 10 pivotal railway lines in China, this paper respectively uses the rough set-based measurement model and value function model (one model for calculating the safety value) for calculating the operation safety value. The calculation result shows that the curve of safety value with the proposed method has smaller error and greater stability than the value function method’s, which verifies the feasibility and effectiveness.
Highlights
China’s high-speed railways have been built since 1998, and the first high-speed railway began operating in 2003
Some relative measurement indexes are mainly simplified by the rough set theory in this chapter, and the main factors that influence the evaluation of safety operation are picked out
The classification standard of measurement index respectively takes the actual index of national standard or the average level of abroad and domestic high-speed railway passengercarrying situations as the medium level, and other levels are acquired by the examination and extrapolation
Summary
China’s high-speed railways have been built since 1998, and the first high-speed railway began operating in 2003. Rough set-based measurement model for safety operation the safety evaluation of high-speed railway operation could be mainly divided into two categories: one is emergency prediction of macro disaster and another is impact mechanism analysis of micro environmental factors [7,8,9,10]. Value function is a value between decision-maker’s subjective feeling and gains or losses, which has been applied in the decision-making science This method is very effective in dealing with the attribute membership problem, and it is well used for evaluating the safety of traffic network [19,20]. In order to increase the objectivity of decision-making process, this paper adopts the fuzzy-distance method [23] to determine the weight coefficient of measurement index of high-speed railway safety operation. Some relative measurement indexes are mainly simplified by the rough set theory in this chapter, and the main factors that influence the evaluation of safety operation are picked out
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