Seaport Network Efficiency Measurement Using Triangular and Trapezoidal Fuzzy Data Envelopment Analyses with Liner Shipping Connectivity Index Output

Article Economics

The relationship between port-level maritime connectivity and efficiency

Beatriz Tovar et al.

Summary: This paper examines the empirical relationship between maritime connectivity and port efficiency using a stochastic output distance function. The results show a positive relationship between connectivity and port efficiency.

JOURNAL OF TRANSPORT GEOGRAPHY (2022)

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Article Computer Science, Artificial Intelligence

Fuzzy data-driven scenario-based robust data envelopment analysis for prediction and optimisation of an electrical discharge machine's parameters

Hadi Gholizadeh et al.

Summary: This study investigates the impact of electrical discharge machines (EDM) on production management and develops a mathematical modelling approach to analyze its effect on volumetric flow rate, electrode corrosion percentage, and surface roughness. The proposed method predicts and optimizes EDM parameters using a fuzzy possibility regression integrated model and an adaptive-network-based fuzzy inference system. The results confirm the accuracy and reliability of the method and encourage further testing.

EXPERT SYSTEMS WITH APPLICATIONS (2022)

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Article Engineering, Chemical

The Fuzzy DEA-Based Manufacturing Service Efficiency Evaluation and Ranking Approach for a Parallel Two-Stage Structure of a Complex Product System on the Example of Solid Waste Recycling

Zhijie Yang et al.

Summary: Accurate production efficiency evaluation plays an important role in adjusting production strategies, improving production efficiency, and reducing environmental impacts. However, existing studies on production efficiency evaluation fail to consider the interactions within parallel production processes accurately. This paper proposes an efficiency calculation model based on the concept of manufacturing service chain for complex product systems. The model takes into account the internal parallel structure of the production system and uses various methods to determine the proportion of solid waste recycling and rank the efficiency interval results. The results demonstrate that overall efficiency of the production system can be enhanced by implementing green manufacturing technology, increasing the recycling of renewable resources, utilizing clean energy, and improving material utilization rate.

PROCESSES (2022)

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Article Mathematics

A Novel Approach of Fuzzy Control Chart with Fuzzy Process Capability Indices Using Alpha Cut Triangular Fuzzy Number

Mohammad Ahmad et al.

Summary: This paper introduces a fuzzy control chart technique based on fuzzy process capability indices (FCPI) and applies alpha cut theory in statistical quality control for fuzzy process control industrial application. The study consists of five phases, exploring the control chart technique using capability indices, and includes a numerical example to demonstrate the effectiveness of the proposed technique. This paper is important for better assessing manufacturing system data and exploring the application of fuzzy control techniques.

MATHEMATICS (2022)

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Article Computer Science, Artificial Intelligence

An integrated optimization method for tactical-level planning in liner shipping with heterogeneous ship fleet and environmental considerations

Junayed Pasha et al.

Summary: Maritime transportation flows and container demand have been increasing, and one common strategy adopted by shipping lines is deploying large ships. However, there has been limited research on heterogeneous fleets in tactical liner shipping decisions. This study proposes an integrated optimization model to address all major tactical liner shipping decisions, including the deployment of a heterogeneous ship fleet and considering emissions generated throughout operations.

ADVANCED ENGINEERING INFORMATICS (2021)

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Article Mathematics

A Novel Approach to Solve Fully Fuzzy Linear Programming Problems with Modified Triangular Fuzzy Numbers

Saeid Jafarzadeh Ghoushchi et al.

Summary: New methods for solving fully fuzzy linear programming (FFLP) problems have been recommended recently. This study proposes a new approach utilizing triangular fuzzy numbers for fuzzy decision parameters and variables to tackle FFLP problems. By incorporating alpha-cut theory and modified triangular fuzzy numbers, the strategy aims to optimize decision variables and the objective function to obtain the optimal fully fuzzy solution for real-world problems. Multiple numerical examples are solved to demonstrate the effectiveness of this method.

MATHEMATICS (2021)

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Article Oceanography

Sustainable port cities with coupling coordination and environmental efficiency

Yudan Kong et al.

Summary: Ports and cities are interconnected, and sustainable ability affects the competitiveness and development characteristics of cities. A comprehensive evaluation of sustainability considering economic, environmental, and social indicators is essential.

OCEAN & COASTAL MANAGEMENT (2021)

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Article Computer Science, Software Engineering

Algorithm 1017: fuzzyreg: An R Package for Fitting Fuzzy Regression Models

Pavel Skrabanek et al.

Summary: Fuzzy regression offers an alternative to statistical regression when the model is indefinite or the relationship between parameters is vague, providing new functionality for fitting fuzzy linear models in R and great potential in predictive modeling.

ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE (2021)

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Article Multidisciplinary Sciences