Emergency Transportation Problem Based on Single-Valued Neutrosophic Set

Lu, Lin; Luo, Xiaochun

doi:https://doi.org/10.1155/2020/4813497

Discrete Dynamics in Nature and Society

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Abstract Introduction Methods Results Conclusions Data Availability Conflicts of Interest Acknowledgments References Copyright Related Articles

Research Article | Open Access

Volume 2020 | Article ID 4813497 | https://doi.org/10.1155/2020/4813497

Emergency Transportation Problem Based on Single-Valued Neutrosophic Set

Lin Lu¹and Xiaochun Luo^1,2

Academic Editor: Giancarlo Consolo

Received13 Jul 2019

Revised12 Feb 2020

Accepted24 Mar 2020

Published21 Apr 2020

Abstract

Emergency events are full of large number of uncertain information. The existence of these uncertain information leads to less research on emergency logistics involving transshipment scenarios. In this paper, a new emergency transport model is proposed, which simulates the scenario of emergency transport from the logistics center to each disaster site and between each disaster site. The single-valued neutrosophic set (SVNS) is applied to transform the emergency transshipment problem into a multiattribute decision-making problem in ambiguous and uncertain environments. Technology for order preference by similarity to ideal solution (TOPSIS) is extended to the single-valued neutrosophic environment to rank and optimize the alternative transshipment routes. Firstly, the attribute weight is determined by using the entropy weight method; secondly, the scoring function of the single-valued neutrosophic fuzzy number is defined; thirdly, the TOPSIS method is used to rank the decision-making; finally, the feasibility and rationality of the proposed method are verified by an emergency operation example.

1. Introduction

Unexpected events will result in huge losses, most of these losses are because the event of emergency logistics has not been carried out in place. How to complete the scheduling scheme and make the emergency resources arrive at the emergency location in the shortest time under the unpredictable situation is the key to consider. The existing emergency distribution literature mainly focuses on the emergency logistics distribution center delivering emergency materials to the disaster-affected areas. However, due to the unexpected events and uncertainties, it will inevitably lead to the shortage of material supply during the disaster. After the disaster, a large number of materials are needed in a short period of time, and secondary disasters may occur on the way of transportation, which makes it more difficult to realize the emergency rescue logistics. It is an urgent task to develop and strengthen the emergency logistics construction. So far, the development of foreign emergency logistics and distribution system is basically mature, and some countries have set up a special emergency logistics agency, such as Canadian emergency logistics preparation office, New Zealand Ministry of civil defense and emergency logistics management, the Australian emergency management agency, the Swiss National emergency management center transport logistics department, Russian emergency situations ministry of transport logistics department, and American California transport emergency office. These emergency logistics systems not only have existing institution comprehensive emergency logistics agencies but also have all sectors of emergency management agencies of the logistics, various emergency management agencies interrelated and support each other, in a huge emergency logistics transport system. Özdamar et al. [1] studied the emergency logistics plan after the disaster and established the emergency logistics distribution model, which combines waterway, railway, and highway. Hale and Moberg [2] established a quantitative model, which studied the selection of emergency logistics supply nodes according to the storage of emergency materials at nodes. Miller-Hooks and Mahmassani [3] studied algorithms that were presented for determining the least possible time paths for all origins to a single destination in networks where the arc weights were discrete random variables whose probability distribution functions vary with time. Chang et al. [4] took the flood in Taipei as the background, introduced scenarios and probability of scenarios to describe the uncertainty of various needs, and established a stochastic programming model to solve the emergency resource scheduling problem. Rathi et al. [5] proposed mathematical models for a macrolevel analysis of a supply logistics problem that involved the allocation of a limited number of transport resources (assets) towards the shipment of cargo and personnel (movement requirements) between many origins and destinations within prescribed time windows. The problem had been modeled by three linear programming formulations. Rahman and Smith [6] reviewed the use of location-allocation models in health service development planning in the developing nations and examined the suitability of these methods for designing healthcare systems. Fiedrich et al. [7] believed the main goal of the initial search-and-rescue period after strong earthquakes was to minimize the total number of fatalities. They attributed this problem to find the best allocation of available resources to the business area and proposed a dynamic optimization model that used detailed descriptions of the operational areas and of the available resources to calculate the resource performance and efficiency for different tasks related to the response. Yi and Özdamar [8] proposed a mixed integer multicommodity network flow model that treated vehicles as integer commodity flows rather than binary variables. This resulted in a more compact formulation whose output was processed to extract a detailed vehicle route and load instruction sheet. There are many kinds of literature studies on the location of emergency supplies, such as Balcik and Beamon [9] who developed a model that determined the number and locations of distribution centers in a relief network and the amount of relief supplies to be stocked at each distribution center to meet the needs of people affected by the disasters. The model, which was a variant of the maximal covering location model, integrated facility location and inventory decisions, considered multiple item types, and captured budgetary constraints and capacity restrictions. Rawls and Turnquist [10] also developed an emergency response planning tool that determined the location and quantities of various types of emergency supplied to be prepositioned, under uncertainty about if, or where, a natural disaster would occur. Artificial intelligence algorithm had also been applied in emergency logistics scheduling [11, 12].

China is one of the first countries in the world to carry out the theme disaster emergency management in emergency logistics and distribution system research area, and there are many scientific research institutions and experts and scholars from colleges and universities who conducted in-depth research and achieved many results. Yao [13] analyzed the characteristics of disaster reduction management in ancient China and the progress, advantages, and disadvantages of modern disaster reduction management. On this basis, the development direction of disaster reduction management in the future was discussed. The importance of professional management functions and institutions, including the organization and management of emergency logistics systems, was put forward to enhance the unity of government management. Sun et al. [14] developed a multiobjective optimization model based on robust optimization theory aiming at minimizing the longest distribution routine time and the total logistic system cost which considered the risk of road congestion, the risk of road damage, the risk of the road complexity, and the demand uncertainty of relief commodities.

Zhu et al. [15] studied the evaluation method based on CI-TOPSIS fuzzy multicriteria group strategy, which was proposed to assess the cascading failure invulnerability of emergency logistics network in order to evaluate the dynamic network topology under emergent even. From the existing literature, the domestic scholars on the characteristics of emergency logistics, security mechanisms, forms of organization and emergency logistics center construction, emergency supplies reserves and scheduling, transportation, and emergency supplies distribution issues conducted extensive research made a series of theoretical research results. As pioneering research in this relatively new field of emergency logistics, these achievements not only played a good indication of the effect of research but also exposed some shortcomings, especially the study of the transport and distribution of emergency logistics is still relatively small. Emergency events are full of large number of uncertain information. The existence of these uncertain information leads to less research on emergency logistics involving transshipment scenarios. In order to deal with this uncertain information, Smarandache [16–20] introduced independent uncertainties and put forward the concept of neutrosophic set considering three parameters: the degree of truth, the degree of uncertainty, and the degree of distortion for the first time. Uncertainty is clearly quantified in the neutrosophic set, and the real, uncertain, and distortion components are irrelevant. This assumption can help decision makers express their opinions more accurately and in detail. Wang et al. [21] and Ye [22] defined the single-valued neutrosophic set and its aggregator, and Ye [23] defined the crossentropy and its correlation coefficients of the single-valued neutrosophic set, which enriched and developed the relevant theories of the neutrosophic set. Recently, many articles on TOPSIS [24–34] and tool [35–38] research appeared in the neutrosophic set field.

Because the unexpected and uncertain nature of emergencies will inevitably lead to the shortage of disaster relief materials in the process of disaster relief, a large number of materials will be needed in a short time after the occurrence of disasters, and secondary disasters such as road breakage may occur during the transportation of materials, which makes the emergency logistics for disaster relief more difficult to achieve. It is an urgent matter to develop and improve emergency logistics. In view of this, in order to solve the problem of shortage of disaster relief materials, according to the requirement of rapid distribution of emergencies, this paper, based on the traditional vertical distribution of emergency logistics centers to various disaster-stricken areas, turns the operation into a feasible and effective means of emergency logistics distribution system. The model simulates the emergency transshipment of logistics centers to various disaster-stricken areas and between disaster-stricken areas. The scenario reflects the development of the disaster situation in the system and its demand for disaster relief materials in a certain period of time. This emergency transportation problem is transformed into a multiattribute decision-making problem under ambiguous and uncertain environments by using the single-valued neutrosophic set, and then TOPSIS is extended to the single-valued midintelligence environment to determine alternative transportation routes by ranking.

2. Methods

2.1. The Basic Concept of Single-Valued Neutrosophic Set (SVNS)

Definition 1. (see [39]). Let be an element in a finite set , and then a single-valued neutrosophic set in is characterized by a truth membership function , an indeterminacy membership function , and a falsity membership function , which can be denoted asThe functions are real standard or nonstandard subsets of , and there is no restriction on the sum of , i.e., .

Definition 2. (see [16]). Let and be single-valued neutrosophic set, and the complement of neutrosophic set is denoted by and can be defined by

Definition 3. (see [39]). According to Majumder and Samanta [40], the entropy measure of a SVNS is expressed inIn order to obtain the entropy value of the th attribute , equation (3) can be written asIt is also noticed that . Due to Hwang and Yoon [41] and Wang and Zhang [42], the entropy weight of the th attibute is expressed in

Definition 4. (see [43]). Let to be a single-valued fuzzy number, and the scoring function of is denoted by and can defined by

Definition 5. (see [44]). Let and be single-valued neutrosophic sets.
The Euclidean distance between single-valued neutrosophic set and single-valued neutrosophic set is expressed inThe positive ideal solution , in which, .
The negative ideal solution , in which, .
The distance from alternative to ideal solution is expressed inThe distance from alternative to negative ideal solution is expressed inThe comprehensive distance of each scheme is expressed in

2.2. Emergency Delivery Model

Emergency logistics and transport are to meet some of the needs for emergency dispatching goods between different agencies at the same level as the supply chain carried out. The logistics network of mutual support peer transfer cargo between nodes in the study is called a lateral transport policy. It requires the implementation of the points shared between each of the affected disaster supplies and transport integration through the coordination point affected supplies to create a system to cover the entire pool of inventory, and maximize system to meet the needs of disaster supplies by improving each affected point service levels to reduce the risk. Thus, to achieve a vertical supply chain integration and horizontal integration of the affected point material combined so that the emergency distribution system to an uncertain environment has stronger adaptability.

Graph theory emergency logistics and distribution problems will be described as follows: . The model indicates the network of emergency logistics distribution. represents the set of nodes in the network (virtual source point , intermediate node distribution center , and demand points ). represents the set of arcs of the network and , , , and represent the transport time set of each arc in the network , unit transportation fee collection , capacity of the collection and traffic collection , respectively. Each parameter calibration model is on its network.

The arc parameter from a virtual source point to the distribution center is the transit time, the unit cost of each arc is 0, and the capacities are .

The arc parameter from the distribution center node to the demand points is that the transportation time, unit cost, capacity, and flow on each arc are, respectively, , , , and .

In this way, the problem of emergency logistics allocation is transformed into a multiattribute decision-making problem in the environment of fuzziness and uncertainty.

3. Example Analysis

After a major disaster in an area, (national materials reserve warehouse) and (provincial materials reserve warehouse) send emergency supplies to seven disaster sites 1, 4, 5, 7, 8, 10, and 11 in the shortest possible time. According to the actual situation of the region, based on the idea of system theory and random network theory, the specific situation after the region affected and and materials reserve base of emergency stockpile to each disaster sites for emergency delivery, but due to the disaster site 7 there is an emergency, original distribution roads impassable and disaster situation deteriorate further, and the disaster sites 4, 8, and 11 transshipment goods and materials, to emergency rescue of the disaster site 7, can build emergency drop shipping process of GERT random network model diagram (see Figure 1), in which the meaning of the activities is as shown in Table 1.

Four emergency transfer routes can be constructed from Figure 1 and Table 1:

According to the characteristics of emergency transportation, the construction attributes are, respectively, . Among them, is transport time, is unit transport costs, its capacity, and is flow.

By inquiring the persons in charge of road traffic and emergency transshipment in this area, the result of the investigation of a standard of an emergency transit route is a single-valued neutrosophic set. Among them, is the degree of truth, is the degree of uncertainty, and is the degree of distortion; .

The details are shown in Table 2.

4. Results

Step 1. Calculate weight based on entropy weight method.
According to formulas (3)–(5), the calculation results are as follows:

Step 2. Calculate positive ideal solution and negative ideal solution .
The scoring function matrix is calculated according to formula (6), as shown in Table 3.
Derived from Table 3, the positive ideal solution and negative ideal solution are as follows:

Step 3. Calculate the distance between the alternatives to the positive ideal solution and the negative ideal solution .
According to formulas (7)–(9), the distance from each alternative to the negative ideal solution are as follows:The distance from each alternative to the negative ideal solution are as follows:

Step 4. Calculate the comprehensive distance of each alternative.
Calculated by formula (10),

Step 5. Sort from big to small and get the best solution. is the max, and choose the path .
From the calculation results, it can be seen that the success rate of emergency transfer from the disaster site 11 to the disaster site 7 is the highest, and the distribution time and other restrictive factors may be better met. The key to improve the feasibility of other transfer routes lies in the effective transfer points, such as establishing a material reserve warehouse between the disaster-affected points 1 and 4, and the material reserve warehouse has enough emergency material reserve. In the emergency distribution and transportation, special circumstances that may be encountered on the way shall be taken into account. In the emergency transfer and distribution from the disaster site 8 to the disaster site 7, the route shall be correctly selected and traffic jams shall be avoided at the same time, so as to enable the materials to be delivered to the place of demand in the shortest time.

5. Conclusions

Emergency transportation requires the effective distribution of materials in the shortest time. However, emergency transportation faces a lot of uncertain information, imprecise information, incomplete information, and inconsistent information, such as the emergency and condition of the event, uncertainty of road condition and traffic time, and material shortage, which makes the decision of emergency distribution more difficult. It is very important to reduce the loss of disaster and adopt scientific and effective methods to deal with information. In this paper, TOPSIS is extended to the environment of a single-valued neutrosophic set to process information. The comparison rule of a single-valued neutrosophic set and the distance measurement method between single-valued neutrosophic sets are used to make the calculation result better, reduce the impact of experts’ personal experience and preferences on the final evaluation result, improve the consistency of evaluation result, and make the processing of evaluation data more scientific and reasonable. From the theoretical level, this paper provides a new way to solve the multiattribute decision-making problem under the uncertain information situation, which enriches the research of the single neutrosophic set theory. This proposed method can also be applied in the application of the multiple attribute decision-making with a single-valued neutrosophic set.

To examine the effectiveness and highlight the advantages of the proposed method, an emergency operation example is implemented to rank and optimize the alternative transportation routes. In the process of dealing with the disaster, we should use the traditional distribution strategy to implement the emergency distribution mode of transshipment among the disaster-affected points, quickly gather and process the uncertain information of the transshipment point through scientific methods, and output the effective emergency distribution scheme.

Data Availability

The data used to support the findings of this study are available from the corresponding author upon request.

Conflicts of Interest

The authors declare that they have no conflicts of interest.

Acknowledgments

This work was supported in part by the Special Project of Guangxi Humanities and Social Sciences Development Research Center “Scientific Research Engineering Research on High-quality Economic Development Theory of Later-developed Areas” (GZL2019010).

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Copyright © 2020 Lin Lu and Xiaochun Luo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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