This paper is concerned with the path planning of the coal mine robot. A new workspace model is presented to describe the complex coal mine environment. Thus, the cost of a path is composed of not only the distance of the path but also some hybrid costs that can be linked to the criteria of path optimization. To overcome the drawbacks of conventional ant colony optimization (ACO) algorithm, an improved ACO algorithm is developed to tackle the issues of path planning of coal mine robot based on the new workspace model. Some simulation experiments are carried out on the path planning of coal mine robot, and the validity and superiority of the new approach can be confirmed by the simulation results.
Multimodal transportation systems are a combination of more environmentally friendly shared transport modes including public transport, ride-sharing, shuttle-sharing, or even completely carbon-free modes such as cycling to better meet customer needs. Multimodal mobility solutions are expected to contribute in mitigating traffic congestion and carbon emissions, and to result in savings in costs. They are also expected to improve access to transportation, more specifically for those in rural or low-populated communities (i.e., difficult to serve by public transportation only). Motivated by its benefits, in this study, we consider the combination of the ride-sharing and public transportation services and formulate a mixed integer programming model for the multimodal transportation planning problem. We propose a heuristic approach (i.e., anglebased clustering [AC] algorithm) and compare its efficiency with the exact solution for different settings. We find that the AC algorithm works well in both small and large settings. We further show that the multimodal transportation system with ride-sharing can yield significant benefits on travel distances and travel times.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.