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Risk Analysis Of Multimodal Transportation Based On Wavelet Support Vector Machine

Posted on:2016-06-28Degree:MasterType:Thesis
Country:ChinaCandidate:J H ZhaoFull Text:PDF
GTID:2309330461979669Subject:Logistics Engineering and Management
Abstract/Summary:PDF Full Text Request
With the development of transportation technology and the expansion of the econ-omic activities area, social competition is becoming increasingly fierce, the market is no longer confined to the traditional transport mode. The trend of the system is one int-egrated freight system in which each mode of transport is effectively connected,and it is the multimodal transport which can be able to meet this kind of transportation needs.As an advanced organized form of transportation,multimodal transport utilizes the inherent advantages of each mode involved,creating synergies and efficiencies.Howev-er, as a transport system, multimodal transport will inevitably be affected by a variety of factors. So, it is particularly important for analyzing and controlling the risk of mult-imodal transport.The main risk analysis steps are risk identify, risk evaluation and risk control.First, this paper summarizes the current status of the multimodal transport domestic and ove-rseas, and indicates some existing problems of our county’s multimodal transport, then elaborates the theory framework of multimodal transport risk analysis systemically. Se-condly, according to the uncertain factors existing in the process of multimodal transp-ort, this paper identifies the external and internal factors of multimodal transport risks, and sets up a preliminary index system which can reflect the level of the comprehensi-ve multimodal transport risk.Then reduces index based on rough set theory, at last sifts 20 key index. Third, sets up a multimodal transport risk evaluation model based on wa-velet support vector regression machine.Finally, this paper tests the model in a multim-odal transport case using LibSVM based on MATLAB software, and compares the result with other methods, which demonstrates the advantages of the method.Then introduces several corresponding means of controlling and preventing the multimodal risks briefly.
Keywords/Search Tags:Multimodal Transport, Risk Analysis, Rough Set, Wavelet, Support Vector Machine
PDF Full Text Request
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