Dimitrios Lyridis | National Technical University of Athens (original) (raw)

Papers by Dimitrios Lyridis

Journal of Intelligent & Robotic Systems

Unmanned Surface Vehicles (USVs) are nowadays used in various applications for security, inspecti... more Unmanned Surface Vehicles (USVs) are nowadays used in various applications for security, inspection and delivery among others. To operate in dynamic and complex environments efficiently demands an optimal path planning where multiple factors should be taken into account. In this paper, the multi-objective path planning problem of USV is formulated aiming to minimize the traveled distance maximizing in parallel the trajectory smoothness and energy efficiency. To address this multi-objective path planning problem with contradicting terms, the popular Ant Colony Optimization (ACO) algorithm is employed enhanced with the proposed Fuzzy Pareto framework. In particular, ACO is used to solve the problem by finding the Pareto solutions optimizing each single objective. Then these solutions are evaluated via the Mamdani fuzzy inference system to identify the optimal one. The ranking of the solutions is based on the defuzzification values. A case study is performed in a simulation area based ...

Ocean Engineering, Dec 1, 2021

Energies

The paper introduces a framework of operation of maritime-related enterprises like port authoriti... more The paper introduces a framework of operation of maritime-related enterprises like port authorities and ship-owning or operating companies along with electric energy providers in the electric energy market as a consequence of the global decarbonization effort and, in particular, due to the implementation of ship electrification at berth. Within this context, the main rules of this energy market framework will consist of a proper combination of power purchase agreements along with contracts for difference in an attempt to obtain transactions that are mutually beneficial at least on a mid-term basis. The methodology, which is fully compatible with the electric energy market rules of the European Union, is enriched by a variety of alternative scenarios on the selling prices of electricity, showing that even when monthly or annual periods are used for reference, it is highly possible that all parties engaged have benefits.

2023 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)

IEEE Electrification Magazine

The Routledge Handbook of Maritime Management, 2019

2017 IEEE Electric Ship Technologies Symposium (ESTS), 2017

In this paper, the appealing perspectives of applying alternative maritime power (‘cold ironing’)... more In this paper, the appealing perspectives of applying alternative maritime power (‘cold ironing’) in ports are analyzed and discussed on the occasion of a promising European funded project, namely ELEMED. It is shown that besides the obvious environmental advantages, other benefits can be introduced, like the ports being smart energy hubs exploiting the smart-grid.

Transport Science and Technology, 2006

Proceedings of the 11th International Congress of the International Maritime Association of the Mediterranean, Lisbon, Portugal, 26-30 September 2005, 2006

Proceedings of the 11th International Congress of the International Maritime Association of the Mediterranean, Lisbon, Portugal, 26-30 September 2005, 2006

2018 XIII International Conference on Electrical Machines (ICEM), 2018

This paper summarizes the main results of the European project ELEMED namely the introduction of ... more This paper summarizes the main results of the European project ELEMED namely the introduction of cold-ironing as an appealing alternative towards greener ports in the East Mediterranean corridor and second the establishment of the concept of applying hybrid-electric vessels to short-sea shipping cases. Moreover, the opportunities of turning the ports as smart energy hubs, where among others Renewable Energy Sources are deployed, is also discussed.

In this study we present a hybrid approach of ACO with fuzzy logic and clustering methods to solv... more In this study we present a hybrid approach of ACO with fuzzy logic and clustering methods to solve multi-objective path planning problems in case of swarm USVs. This study aims to enhance the performance of ACO algorithm by integrating fuzzy logic in order to cope with the multiple contradicting objectives and generate quality solutions by in parallel identifying the mission areas of each USV to reach the desired targets. The objectives that are taken into account are the minimization of traveled distance and energy consumption, and the maximization of path smoothness. A comparative evaluation is conducted among ACO and fuzzy inference systems, Mamdani (ACO-M) and Takagi–Sugeno–Kang (ACO-TSK). The results showed that depending on the needs of the application, each methodology can contribute respectively. ACO-M generates better paths but ACO-TSK presents higher computation efficiency.

Sensors

Future data-intensive intelligent applications are required to traverse across the cloud-to-edge-... more Future data-intensive intelligent applications are required to traverse across the cloud-to-edge-to-IoT continuum, where cloud and edge resources elegantly coordinate, alongside sensor networks and data. However, current technical solutions can only partially handle the data outburst associated with the IoT proliferation experienced in recent years, mainly due to their hierarchical architectures. In this context, this paper presents a reference architecture of a meta-operating system (RAMOS), targeted to enable a dynamic, distributed and trusted continuum which will be capable of facilitating the next-generation smart applications at the edge. RAMOS is domain-agnostic, capable of supporting heterogeneous devices in various network environments. Furthermore, the proposed architecture possesses the ability to place the data at the origin in a secure and trusted manner. Based on a layered structure, the building blocks of RAMOS are thoroughly described, and the interconnection and coor...

Conference Proceedings of ICMET Oman, 2019

The paper deals with the new development perspectives of modern smart ports in an attempt to offe... more The paper deals with the new development perspectives of modern smart ports in an attempt to offer premium services to ships, passengers, commercial business, the environment even the society fully exploiting the smart grid concept. Besides highlighting the courses of actions towards such reformation, it is discussed that of major importance is the proper design of a centralized energy management system providing supervisory monitoring and control of all energy transactions among providers and consumers as well as their optimized co-operation.

Advances in Maritime Logistics and Supply Chain Systems, 2011

Global NEST International Conference on Environmental Science & Technology

In this paper the global market trends and design challenges in the offshore aquaculture industry... more In this paper the global market trends and design challenges in the offshore aquaculture industry will be presented, focusing on the use of innovative materials for the construction of fish cages. Newly designed cages offer sustainable and environmentally friendly solutions for offshore cage systems, effectiveness in the intended environmental conditions, as well as advanced fish production compared to traditional coastal aquacultures, in order to satisfy the changes in the consumer preferences and the continuously growing feeding demands of the world population. At the end of this paper, a short presentation of the MATISSE project (Study of the appropriateness and the adequacy of modern materials for offshore fish cage and nets – numerical and experimental investigation in realistic loading conditions) and its key results will be performed.

Global NEST International Conference on Environmental Science & Technology

This paper presents the state-of-the-art research conducted as part of EN.I.R.I.S.S.T. regarding ... more This paper presents the state-of-the-art research conducted as part of EN.I.R.I.S.S.T. regarding the emerging impact of shipping and transport to the environment. More specifically, it presents the digital platforms and services that are developed as part of the research infrastructure and are related to environmental sciences. The first is the “EcoMarpol Platform”, which caters for collecting and analyzing pollution-driven data as well as calculating the environmental imprint (atmospheric emissions, waste production, chemical pollution of marine waters and sediments) of maritime activities. This platform additionally includes the online monitoring of in-port emissions from shipping and pollution from ship-to-ship transfer operations or accidents and the environmental risk assessment management. The other platform is the “Passenger Sustainable Travel Platform”, as part of which a tool for calculating aircraft emissions (CO2 and air pollutants) will be developed and applied in the Gr...

The Dynamics of Short Sea Shipping, 2018

Industry clusters provide a novel framework for interpreting industries. They offer a penetrating... more Industry clusters provide a novel framework for interpreting industries. They offer a penetrating understanding as to the rudiments of economic activity, within a region. There has been a substantial drive in recent years, to research and support the cluster concept, though this process is far from delivering an understanding without caveats and restrictions. Clusters can provide valuable insight within industries, as they pertain to eventualities that harbour collective health, for many organizations. This instance summates the basic strength, but also, the elementary weakness of the concept. At the same time, caution should be applied, as the construct is not straightforward, and is many times left to selective interpretation. This chapter aims at investigating the complementarities of strategic planning of short sea shipping within a maritime cluster perspective.

Journal of Intelligent & Robotic Systems

Unmanned Surface Vehicles (USVs) are nowadays used in various applications for security, inspecti... more Unmanned Surface Vehicles (USVs) are nowadays used in various applications for security, inspection and delivery among others. To operate in dynamic and complex environments efficiently demands an optimal path planning where multiple factors should be taken into account. In this paper, the multi-objective path planning problem of USV is formulated aiming to minimize the traveled distance maximizing in parallel the trajectory smoothness and energy efficiency. To address this multi-objective path planning problem with contradicting terms, the popular Ant Colony Optimization (ACO) algorithm is employed enhanced with the proposed Fuzzy Pareto framework. In particular, ACO is used to solve the problem by finding the Pareto solutions optimizing each single objective. Then these solutions are evaluated via the Mamdani fuzzy inference system to identify the optimal one. The ranking of the solutions is based on the defuzzification values. A case study is performed in a simulation area based ...

Ocean Engineering, Dec 1, 2021

Energies

The paper introduces a framework of operation of maritime-related enterprises like port authoriti... more The paper introduces a framework of operation of maritime-related enterprises like port authorities and ship-owning or operating companies along with electric energy providers in the electric energy market as a consequence of the global decarbonization effort and, in particular, due to the implementation of ship electrification at berth. Within this context, the main rules of this energy market framework will consist of a proper combination of power purchase agreements along with contracts for difference in an attempt to obtain transactions that are mutually beneficial at least on a mid-term basis. The methodology, which is fully compatible with the electric energy market rules of the European Union, is enriched by a variety of alternative scenarios on the selling prices of electricity, showing that even when monthly or annual periods are used for reference, it is highly possible that all parties engaged have benefits.

2023 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)

IEEE Electrification Magazine

The Routledge Handbook of Maritime Management, 2019

2017 IEEE Electric Ship Technologies Symposium (ESTS), 2017

In this paper, the appealing perspectives of applying alternative maritime power (‘cold ironing’)... more In this paper, the appealing perspectives of applying alternative maritime power (‘cold ironing’) in ports are analyzed and discussed on the occasion of a promising European funded project, namely ELEMED. It is shown that besides the obvious environmental advantages, other benefits can be introduced, like the ports being smart energy hubs exploiting the smart-grid.

Transport Science and Technology, 2006

Proceedings of the 11th International Congress of the International Maritime Association of the Mediterranean, Lisbon, Portugal, 26-30 September 2005, 2006

Proceedings of the 11th International Congress of the International Maritime Association of the Mediterranean, Lisbon, Portugal, 26-30 September 2005, 2006

2018 XIII International Conference on Electrical Machines (ICEM), 2018

This paper summarizes the main results of the European project ELEMED namely the introduction of ... more This paper summarizes the main results of the European project ELEMED namely the introduction of cold-ironing as an appealing alternative towards greener ports in the East Mediterranean corridor and second the establishment of the concept of applying hybrid-electric vessels to short-sea shipping cases. Moreover, the opportunities of turning the ports as smart energy hubs, where among others Renewable Energy Sources are deployed, is also discussed.

In this study we present a hybrid approach of ACO with fuzzy logic and clustering methods to solv... more In this study we present a hybrid approach of ACO with fuzzy logic and clustering methods to solve multi-objective path planning problems in case of swarm USVs. This study aims to enhance the performance of ACO algorithm by integrating fuzzy logic in order to cope with the multiple contradicting objectives and generate quality solutions by in parallel identifying the mission areas of each USV to reach the desired targets. The objectives that are taken into account are the minimization of traveled distance and energy consumption, and the maximization of path smoothness. A comparative evaluation is conducted among ACO and fuzzy inference systems, Mamdani (ACO-M) and Takagi–Sugeno–Kang (ACO-TSK). The results showed that depending on the needs of the application, each methodology can contribute respectively. ACO-M generates better paths but ACO-TSK presents higher computation efficiency.

Sensors

Future data-intensive intelligent applications are required to traverse across the cloud-to-edge-... more Future data-intensive intelligent applications are required to traverse across the cloud-to-edge-to-IoT continuum, where cloud and edge resources elegantly coordinate, alongside sensor networks and data. However, current technical solutions can only partially handle the data outburst associated with the IoT proliferation experienced in recent years, mainly due to their hierarchical architectures. In this context, this paper presents a reference architecture of a meta-operating system (RAMOS), targeted to enable a dynamic, distributed and trusted continuum which will be capable of facilitating the next-generation smart applications at the edge. RAMOS is domain-agnostic, capable of supporting heterogeneous devices in various network environments. Furthermore, the proposed architecture possesses the ability to place the data at the origin in a secure and trusted manner. Based on a layered structure, the building blocks of RAMOS are thoroughly described, and the interconnection and coor...

Conference Proceedings of ICMET Oman, 2019

The paper deals with the new development perspectives of modern smart ports in an attempt to offe... more The paper deals with the new development perspectives of modern smart ports in an attempt to offer premium services to ships, passengers, commercial business, the environment even the society fully exploiting the smart grid concept. Besides highlighting the courses of actions towards such reformation, it is discussed that of major importance is the proper design of a centralized energy management system providing supervisory monitoring and control of all energy transactions among providers and consumers as well as their optimized co-operation.

Advances in Maritime Logistics and Supply Chain Systems, 2011

Global NEST International Conference on Environmental Science & Technology

In this paper the global market trends and design challenges in the offshore aquaculture industry... more In this paper the global market trends and design challenges in the offshore aquaculture industry will be presented, focusing on the use of innovative materials for the construction of fish cages. Newly designed cages offer sustainable and environmentally friendly solutions for offshore cage systems, effectiveness in the intended environmental conditions, as well as advanced fish production compared to traditional coastal aquacultures, in order to satisfy the changes in the consumer preferences and the continuously growing feeding demands of the world population. At the end of this paper, a short presentation of the MATISSE project (Study of the appropriateness and the adequacy of modern materials for offshore fish cage and nets – numerical and experimental investigation in realistic loading conditions) and its key results will be performed.

Global NEST International Conference on Environmental Science & Technology

This paper presents the state-of-the-art research conducted as part of EN.I.R.I.S.S.T. regarding ... more This paper presents the state-of-the-art research conducted as part of EN.I.R.I.S.S.T. regarding the emerging impact of shipping and transport to the environment. More specifically, it presents the digital platforms and services that are developed as part of the research infrastructure and are related to environmental sciences. The first is the “EcoMarpol Platform”, which caters for collecting and analyzing pollution-driven data as well as calculating the environmental imprint (atmospheric emissions, waste production, chemical pollution of marine waters and sediments) of maritime activities. This platform additionally includes the online monitoring of in-port emissions from shipping and pollution from ship-to-ship transfer operations or accidents and the environmental risk assessment management. The other platform is the “Passenger Sustainable Travel Platform”, as part of which a tool for calculating aircraft emissions (CO2 and air pollutants) will be developed and applied in the Gr...

The Dynamics of Short Sea Shipping, 2018

Industry clusters provide a novel framework for interpreting industries. They offer a penetrating... more Industry clusters provide a novel framework for interpreting industries. They offer a penetrating understanding as to the rudiments of economic activity, within a region. There has been a substantial drive in recent years, to research and support the cluster concept, though this process is far from delivering an understanding without caveats and restrictions. Clusters can provide valuable insight within industries, as they pertain to eventualities that harbour collective health, for many organizations. This instance summates the basic strength, but also, the elementary weakness of the concept. At the same time, caution should be applied, as the construct is not straightforward, and is many times left to selective interpretation. This chapter aims at investigating the complementarities of strategic planning of short sea shipping within a maritime cluster perspective.