Scipediacontent: Scipediacontent moved page Draft Content 445604200 to 238,295fx

2021-03-22T20:18:27Z

Scipediacontent moved page Draft Content 445604200 to 238,295fx

Scipediacontent: Created page with " == Abstract == Ambulance location problem is a key issue in Emergency Medical Service (EMS) system, which is to determine where to locate ambulances such that the emergency..."

2021-03-22T20:17:39Z

Created page with " == Abstract == Ambulance location problem is a key issue in Emergency Medical Service (EMS) system, which is to determine where to locate ambulances such that the emergency..."

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== Abstract ==

Ambulance location problem is a key issue in Emergency Medical Service (EMS) system, which is to determine where to locate ambulances such that the emergency calls can be responded efficiently. Most related researches focus on deterministic problems or assume that the probability distribution of demand can be estimated. In practice, however, it is difficult to obtain perfect information on probability distribution. This paper investigates the ambulance location problem with partial demand information; i.e., only the mean and covariance matrix of the demands are known. The problem consists of determining base locations and the employment of ambulances, to minimize the total cost. A new distribution-free chance constrained model is proposed. Then two approximated mixed integer programming (MIP) formulations are developed to solve it. Finally, numerical experiments on benchmarks (Nickel et al., 2016) and 120 randomly generated instances are conducted, and computational results show that our proposed two formulations can ensure a high service level in a short time. Specifically, the second formulation takes less cost while guaranteeing an appropriate service level.

Document type: Article

== Full document ==
<pdf>Media:Draft_Content_445604200-beopen1179-2972-document.pdf</pdf>

== Original document ==

The different versions of the original document can be found in:

* [http://dx.doi.org/10.1155/2018/9364129 http://dx.doi.org/10.1155/2018/9364129] under the license http://creativecommons.org/licenses/by/4.0/

* [https://doi.org/10.1155/2018/9364129 https://doi.org/10.1155/2018/9364129] under the license http://creativecommons.org/licenses/by/4.0

* [http://downloads.hindawi.com/journals/jat/2018/9364129.pdf http://downloads.hindawi.com/journals/jat/2018/9364129.pdf],
: [http://downloads.hindawi.com/journals/jat/2018/9364129.xml http://downloads.hindawi.com/journals/jat/2018/9364129.xml],
: [http://dx.doi.org/10.1155/2018/9364129 http://dx.doi.org/10.1155/2018/9364129] under the license cc-by

* [http://dx.doi.org/10.1155/2018/9364129 http://dx.doi.org/10.1155/2018/9364129],
: [https://doaj.org/toc/0197-6729 https://doaj.org/toc/0197-6729],
: [https://doaj.org/toc/2042-3195 https://doaj.org/toc/2042-3195] under the license http://creativecommons.org/licenses/by/4.0/

* [https://www.hindawi.com/journals/jat/2018/9364129 https://www.hindawi.com/journals/jat/2018/9364129],
: [http://downloads.hindawi.com/journals/jat/2018/9364129.pdf http://downloads.hindawi.com/journals/jat/2018/9364129.pdf],
: [https://academic.microsoft.com/#/detail/2891278722 https://academic.microsoft.com/#/detail/2891278722]

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Scipediacontent: Scipediacontent moved page Draft Content 445604200 to 238,295fx

Scipediacontent: Created page with " == Abstract == Ambulance location problem is a key issue in Emergency Medical Service (EMS) system, which is to determine where to locate ambulances such that the emergency..."