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Full-Text Articles in Engineering
Optimal Speed Limit For Shared-Use Roadways, Yongqiang Yang
Optimal Speed Limit For Shared-Use Roadways, Yongqiang Yang
Dissertations
Motor vehicle crashes are a serious social problem in the United States. Each year a large number of motor vehicle crashes occur and many people are killed or injured, resulting in substantial economic costs. To minimize economic costs, it is necessary to determine optimal speed limits on roadways because of the strong relationship among posted speed limit, crash frequency, and crash injury severity.
A comprehensive literature review about the relationship among posted speed limit, crash frequency, and crash injury severity level was conducted. Crash frequency prediction models and crash injury severity models are developed to obtain crash frequency and injury …
Virtual Transshipments And Revenue-Sharing Contracts In Supply Chain Management, Zhaoqiong Qin
Virtual Transshipments And Revenue-Sharing Contracts In Supply Chain Management, Zhaoqiong Qin
Dissertations
This dissertation presents the use of virtual transshipments and revenue-sharing contracts for inventory control in a small scale supply chain. The main objective is to maximize the total profit in a centralized supply chain or maximize the supply chain's profit while keeping the individual components' incentives in a decentralized supply chain.
First, a centralized supply chain with two capacitated manufacturing plants situated in two distinct geographical regions is considered. Normally, demand in each region is mostly satisfied by the local plant. However, if the local plant is understocked while the remote one is overstocked, some of the newly generated demand …
Bus Arrival Time Prediction Using Stochastic Time Series And Markov Chains, Rajat Rajbhandari
Bus Arrival Time Prediction Using Stochastic Time Series And Markov Chains, Rajat Rajbhandari
Dissertations
Public transit agencies rely on disseminating accurate and reliable information to transit users to achieve higher service quality and attract more users. With the development of new technologies, the concept of providing users with reliable information about bus arrival times at bus stops has become increasingly attractive. Due to the fact that bus operation parameters and variables are highly stochastic, modeling prediction of bus travel and arrival times has become one of the many challenging tasks.
Stochastic time series and delay propagation models to predict bus arrival times using historical information were developed. Markov models were developed to predict propagation …