| Autor: |
Dragu, V, Rosca, E, Rusca, A, Roman, E A |
| Zdroj: |
IOP Conference Series: Materials Science and Engineering; August 2018, Vol. 400 Issue: 1 p082007-082007, 1p |
| Abstrakt: |
The development of the port facilities must be carried out in concordance with the ships flows size so that the sum of waiting costs for demands arrived for service and also for the service stations is minimal. In actual operating conditions this minimum is difficult to obtain due to varying demands faced by ports. The solutions for the port facilities'development are based on the criterion that aims maximizing the social benefit obtained using the mathematical models of queuing theory. The paper aims to identify models for developing port facilities' by which a rational dimensioning of installations subjected to time variable demands will be achieved (handling facilities at berth, covered / uncovered storage areas).Considering the multitude of mathematical models of the differentiated queuing theory according to the number of channels, distribution of arrival times and distribution of service time or the number of places in the waiting string / system, there is a problem of choosing the model to approximate as accurately as possible the future operation of the port system. The model validation is done through a case study which solve a problem of rational development of the necessary port facilities at an operative berth. The proposed model use the minimum economic cost criterion (cost of ships waiting for service and cost of berth inactivity) knowing that the ratio of these costs in most cases exceeds 4/1. |
| Databáze: |
Supplemental Index |
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