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Towards a Digital Twin Modeling Method for Container Terminal Port

Hakimi, Faouzi, Khaled, Tarek, Al-Kharaz, Mohammed, Gouabou, Arthur Cartel Foahom, Amzil, Kenza

arXiv.org Artificial Intelligence

This paper introduces a novel strategy aimed at enhancing productivity and minimizing non-productive movements within container terminals, specifically focusing on container yards. It advocates for the implementation of a digital twin-based methodology to streamline the operations of stacking cranes (SCs) responsible for container handling. The proposed approach entails the creation of a virtual container yard that mirrors the physical yard within a digital twin system, facilitating real-time observation and validation. In addition, this article demonstrates the effectiveness of using a digital twin to reduce unproductive movements and improve productivity through simulation. It defines various operational strategies and takes into account different yard contexts, providing a comprehensive understanding of optimisation possibilities. By exploiting the capabilities of the digital twin, managers and operators are provided with crucial information on operational dynamics, enabling them to identify areas for improvement. This visualisation helps decision-makers to make informed choices about their stacking strategies, thereby improving the efficiency of overall container terminal operations. Overall, this paper present a digital twin solution in container terminal operations, offering a powerful tool for optimising productivity and minimising inefficiencies.


Forecasting Empty Container availability for Vehicle Booking System Application

Gouabou, Arthur Cartel Foahom, Al-Kharaz, Mohammed, Hakimi, Faouzi, Khaled, Tarek, Amzil, Kenza

arXiv.org Artificial Intelligence

Container terminals, pivotal nodes in the network of empty container movement, hold significant potential for enhancing operational efficiency within terminal depots through effective collaboration between transporters and terminal operators. This collaboration is crucial for achieving optimization, leading to streamlined operations and reduced congestion, thereby benefiting both parties. Consequently, there is a pressing need to develop the most suitable forecasting approaches to address this challenge. This study focuses on developing and evaluating a data-driven approach for forecasting empty container availability at container terminal depots within a Vehicle Booking System (VBS) framework. It addresses the gap in research concerning optimizing empty container dwell time and aims to enhance operational efficiencies in container terminal operations. Four forecasting models-Naive, ARIMA, Prophet, and LSTM-are comprehensively analyzed for their predictive capabilities, with LSTM emerging as the top performer due to its ability to capture complex time series patterns. The research underscores the significance of selecting appropriate forecasting techniques tailored to the specific requirements of container terminal operations, contributing to improved operational planning and management in maritime logistics.


A Surrogate Model for Quay Crane Scheduling Problem

Park, Kikun, Bae, Hyerim

arXiv.org Artificial Intelligence

In ports, a variety of tasks are carried out, and scheduling these tasks is crucial due to its significant impact on productivity, making the generation of precise plans essential. This study proposes a method to solve the Quay Crane Scheduling Problem (QCSP), a representative task scheduling problem in ports known to be NP-Hard, more quickly and accurately. First, the study suggests a method to create more accurate work plans for Quay Cranes (QCs) by learning from actual port data to accurately predict the working speed of QCs. Next, a Surrogate Model is proposed by combining a Machine Learning (ML) model with a Genetic Algorithm (GA), which is widely used to solve complex optimization problems, enabling faster and more precise exploration of solutions. Unlike methods that use fixed-dimensional chromosome encoding, the proposed methodology can provide solutions for encodings of various dimensions. To validate the performance of the newly proposed methodology, comparative experiments were conducted, demonstrating faster search speeds and improved fitness scores. The method proposed in this study can be applied not only to QCSP but also to various NP-Hard problems, and it opens up possibilities for the further development of advanced search algorithms by combining heuristic algorithms with ML models.


Optimizing Container Loading and Unloading through Dual-Cycling and Dockyard Rehandle Reduction Using a Hybrid Genetic Algorithm

Rahman, Md. Mahfuzur, Jahin, Md Abrar, Islam, Md. Saiful, Mridha, M. F.

arXiv.org Artificial Intelligence

This paper addresses the optimization of container unloading and loading operations at ports, integrating quay-crane dual-cycling with dockyard rehandle minimization. We present a unified model encompassing both operations: ship container unloading and loading by quay crane, and the other is reducing dockyard rehandles while loading the ship. We recognize that optimizing one aspect in isolation can lead to suboptimal outcomes due to interdependencies. Specifically, optimizing unloading sequences for minimal operation time may inadvertently increase dockyard rehandles during loading and vice versa. To address this NP-hard problem, we propose a hybrid genetic algorithm (GA) QCDC-DR-GA comprising one-dimensional and two-dimensional GA components. Our model, QCDC-DR-GA, consistently outperforms four state-of-the-art methods in maximizing dual cycles and minimizing dockyard rehandles. Compared to those methods, it reduced 15-20% of total operation time for large vessels. Statistical validation through a two-tailed paired t-test confirms the superiority of QCDC-DR-GA at a 5% significance level. The approach effectively combines QCDC optimization with dockyard rehandle minimization, optimizing the total unloading-loading time. Results underscore the inefficiency of separately optimizing QCDC and dockyard rehandles. Fragmented approaches, such as QCDC Scheduling Optimized by bi-level GA and GA-ILSRS (Scenario 2), show limited improvement compared to QCDC-DR-GA. As in GA-ILSRS (Scenario 1), neglecting dual-cycle optimization leads to inferior performance than QCDC-DR-GA. This emphasizes the necessity of simultaneously considering both aspects for optimal resource utilization and overall operational efficiency.


A Data-driven and multi-agent decision support system for time slot management at container terminals: A case study for the Port of Rotterdam

Nadi, Ali, Snelder, Maaike, van Lint, J. W. C., Tavasszy, Lóránt

arXiv.org Artificial Intelligence

Controlling the departure time of the trucks from a container hub is important to both the traffic and the logistics systems. This, however, requires an intelligent decision support system that can control and manage truck arrival times at terminal gates. This paper introduces an integrated model that can be used to understand, predict, and control logistics and traffic interactions in the port-hinterland ecosystem. This approach is context-aware and makes use of big historical data to predict system states and apply control policies accordingly, on truck inflow and outflow. The control policies ensure multiple stakeholders satisfaction including those of trucking companies, terminal operators, and road traffic agencies. The proposed method consists of five integrated modules orchestrated to systematically steer truckers toward choosing those time slots that are expected to result in lower gate waiting times and more cost-effective schedules. The simulation is supported by real-world data and shows that significant gains can be obtained in the system.


How Deep Learning is helping to save human lives at a container terminal

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The Port of Montevideo is located in the capital city of Montevideo, on the banks of the "Río de la Plata" river. Due to its strategic location between the Atlantic Ocean and the "Uruguay" river, it is considered one of the main routes of cargo mobilization for Uruguay and MERCOSUR . Over the past decades, it has established itself as a multipurpose port handling: containers, bulk, fishing boats, cruises, passenger transport, cars, and general cargo. MERCOSUR or officially the Southern Common Market is a commercial and political bloc established in 1991 by several South American countries. Moreover, only two companies concentrate all-cargo operations in this port: the company of Belgian origin Katoen Natie and the Chilean and Canadian capital company Montecon.


Maritime port operators see great promise in artificial intelligence – DC Velocity

#artificialintelligence

AI could improve operational consistencies and enhance equipment utilization, Navis survey shows. Global container terminals are expected to embrace automated decision making powered by artificial intelligence (AI) as they pursue ways to improve operational consistencies and enhance equipment utilization, a new survey shows. The findings indicate that container terminals, regardless of their AI maturity, are increasingly aware of the possibilities of automated decision-making, according to supply chain technology provider Navis LLC. The Oakland, California-based firm said its TechValidate customer survey included responses from nearly 60 Navis customers, representing a cross-section of container terminals around the world using various degrees of automation. In addition to the 86% who cited operational consistency and equipment utilization as the most important benefits of automated decision-making, port operators also named other goals.


Supersize Ships Prompt Port Automation

WSJ.com: WSJD - Technology

Proponents of automated cargo handling at U.S. ports have a rule: where megaships call, robots soon follow. So far, Southern California appears to be the destination of choice for both. Over the next decade, marine terminals at the Ports of Los Angeles and Long Beach are expected to lead the way in adopting robotic cargo-handling capabilities in response to the arrival of more supersize ships. Unloading and organizing tens of thousands of containers--and readying an equal number to ship back out--requires coordination on a scale that is best left to machines, said Ashebir Jacob, a port planner and engineer with Moffatt & Nichol, a maritime infrastructure advisory firm. "As we start to receive bigger and bigger vessels on the West Coast, [automation] becomes really critical," he said.