The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Given the condition of multi-demand sites, multi-variety emergency materials and roads with forbidden time window, the mathematic model and simulation model based on NCL are set up, and heuristic arithmetic based on POEM is designed in the paper. At last, the model and heuristic arithmetic are validated by an example and the satisfying result is gained.
The Vehicle routing problem of oil supply is characteristic of many constraints and complicated factors. In the paper, the Constraint Programming model of oil supply Vehicle routing problem is designed by NCL, and the heuristic arithmetic based on two phase optimization is designed by POEM. At last, the model and heuristic arithmetic are validated by an example and the satisfying result is gained.
In order to solve internal logistics problems of iron and steel works, such as low transportation efficiency of vehicles and high transportation cost, the production process and traditional transportation style of iron and steel works were introduced. The internal transport tasks of iron and steel works were grouped based on cluster analysis according to demand time of the transportation. An improved...
Interpretative Structural Modeling (ISM) is an effective approach to analyze the complex system structure. The adjacency matrix represents the relations between and among system elements and the system digraph can be drawn by deduction of the reachability matrix. The adjacency matrix is usually built by experts' experience. Because the process does not take the corresponding data of system elements...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.