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Wyświetlanie 1-15 z 23
Tytuł:
Research on the application of cold energy of largescale LNG-powered container ships to refrigerated containers
Autorzy:
Li, Yajing
Li, Boyang
Deng, Fang
Yang, Qianqian
Zhang, Baoshou
Powiązania:
https://bibliotekanauki.pl/articles/2033271.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
LNG-powered container ship
LNG cold energy utilization
refrigerated container
cold storage
Opis:
With the aim of considering the problem of excess fuel cold energy and excessive power consumption of refrigerated containers on large LNG-powered container ships, a new utilisation method using LNG-fuelled cold energy to cool refrigerated containers in cargo holds is proposed in this study, and the main structure of the cold storage in the method is modelled in three dimensions. Then, combined with the different conditions, 15 different combination schemes of high temperature cold storage and low temperature cold storage are designed to utilise the cold energy of LNG fuel, the exergy efficiency and cold energy utilisation rate calculation model of the system is established. The simulation tool ‘Aspen HYSYS’ is used to simulate and calculate the exergy efficiency and cold energy utilisation rate of the system under 15 combinations, verifying the feasibility of the scheme. According to the characteristics of such a ship’s cross-seasonal navigation routes and the number of refrigerated containers loaded in different ports, the combination schemes of the number of low-temperature cold storage and high-temperature cold storage are selected. Thus, the average exergy efficiency and cold energy utilisation rate of the whole line is obtained, which proves that LNG-powered container ships could effectively utilise the cold energy of LNG. By calculating the total electric energy consumed by refrigerated containers on the whole sailing route, before and after the adoption of the LNG cold energy method, it is found that the adoption of this new method can promote the realisation of energy saving and emission reduction of ships.
Źródło:
Polish Maritime Research; 2021, 4; 107-121
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-organizing wireless monitoring system for cargo containers
Autorzy:
Katulski, R. J.
Sadowski, J.
Stefański, J.
Ambroziak, S. J.
Powiązania:
https://bibliotekanauki.pl/articles/258794.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
wireless monitoring
container transport
container module realization
global system concept
ad-hoc networks
Opis:
This paper presents a description of new global monitoring system for containers with its layer-modular structure, as a solution for enhance security and efficiency of container transport with particular emphasis on the practical implementation of that system for maritime container terminals. Especially the Smart Container Module (SCM) architecture and its operation as a part of the Self-Organizing Container Monitoring Network is presented.
Źródło:
Polish Maritime Research; 2009, 3; 45-50
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An integrated framework for various operation plans in container terminals
Autorzy:
Won, S. H.
Kim, K. H.
Powiązania:
https://bibliotekanauki.pl/articles/258792.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
container terminals
planning
resource capacity
Opis:
This study provides a framework for integrating various planning activities in container terminals. First, we introduce various planning activities in container terminals and identify decision-making problems for each planning activity. Input parameters, decision variables, objectives, constraints, time buckets, and the planning horizon for each decision activity are identified. Next, we introduce the concept of a resource profile and planning procedure simultaneously by considering availabilities of various resources and resource requirements in a planning activity.
Źródło:
Polish Maritime Research; 2009, 3; 51-61
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of an Artificial Neural Network and Multiple Nonlinear Regression to estimate container ship length between perpendiculars
Autorzy:
Cepowski, Tomasz
Chorab, Paweł
Łozowicka, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/1551808.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship design
ANN
regression
container ship
length
Opis:
Container ship length was estimated using artificial neural networks (ANN), as well as a random search based on Multiple Nonlinear Regression (MNLR). Two alternative equations were developed to estimate the length between perpendiculars based on container number and ship velocity using the aforementioned methods and an up-to-date container ship database. These equations could have practical applications during the preliminary design stage of a container ship. The application of heuristic techniques for the development of a MNLR model by variable and function randomisation leads to the automatic discovery of equation sets. It has been shown that an equation elaborated using this method, based on a random search, is more accurate and has a simpler mathematical form than an equation derived using ANN.
Źródło:
Polish Maritime Research; 2021, 2; 36-45
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and simulation methodology for dynamic resources assignment system in container terminal
Autorzy:
Lu, B.
Powiązania:
https://bibliotekanauki.pl/articles/260155.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
container terminal
resources assignment system
modelling
simulation
Opis:
As the competition among international container terminals has become increasingly fierce, every port is striving to maintain the competitive edge and provide satisfactory services to port users. By virtue of information technology enhancement, many efforts to raise port competitiveness through an advanced operation system are actively being made, and judging from the viewpoint of investment effect, these efforts are more preferable than infrastructure expansion and additional equipment acquisition. Based on simulation, this study has tried to prove that RFID-based real-time location system (RTLS) data collection and dynamic operation of transfer equipment brings a positive effect on the productivity improvement and resource utilization enhancement. Moreover, this study on the demand for the real-time data for container terminal operation have been made, and operation processes have been redesigned along with the collection of related data, and based on them, simulations have been conducted. As a result of them, much higher productivity improvement could be expected.
Źródło:
Polish Maritime Research; 2016, S 1; 97-103
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of influence of lack of the electricity supply to reefer containers serviced at sea ports on storing conditions of cargoes contained in them
Autorzy:
Filina, L.
Filin, S.
Powiązania:
https://bibliotekanauki.pl/articles/258578.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sea port
reefer container
refrigerated cargo
risk factors
Opis:
Servicing the reefer containers at sea ports requires more reliability and precision than servicing the conventional ones because of specificity of perishable cargoes shipped in them. This paper is aimed at making analysis of way of servicing the reefer containers stored at sea port and at investigating its influence on storing conditions of refrigerated cargoes contained in them. Lack of the electricity supply to refrigerating unit of reefer container is one of the most common extraordinary situations in port area, which may lead to loss of quality of cargo contained in the container. On the basis of scenarios of possible progress of such situations, elaborated by means of calculations, rate of change of temperature of cargo in reefer containers cut-off from electricity supply source was determined and relevant recommendations as to organization of sevicing such containers at sea port, were elaborated.
Źródło:
Polish Maritime Research; 2008, 4; 96-102
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation studies into quayside transport and storage yard operations in container terminals
Autorzy:
Deja, M.
Dobrzyński, M.
Siemiątkowski, M. S.
Wiśniewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/258686.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
container terminals
mechanical handling
simulation modelling
quantitative analysis
Opis:
The focus of the paper is in quayside transport and storage yard operations in container terminals. Relevant algorithms have been applied and a simulation model adopted. Evaluative criteria chosen for that model were: the total time of ship unloading and the truck utilization level. Recommendations for unloading in berth and yard areas were analysed in three different case studies. Results of simulations and deterministic model based analyses are included.
Źródło:
Polish Maritime Research; 2017, S 1; 46-52
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploration of land development intensity index of port container logistics park based on quantitative algorithm and pent analysis method
Autorzy:
Lyu, N.
Zhao, J.
Lyu, M.
Powiązania:
https://bibliotekanauki.pl/articles/260014.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
development intensity
logistics park
container
indicator
land
port
Opis:
To give full play to the circulation function of the port container logistics park, it is urgent to study the development intensity of the land in the port container logistics park and to guide the scientific development of the port logistics park with reasonable development intensity control index. The current situation of land development intensity control index of container logistics park at home and abroad is analysed, the PENT (politics, economy, society and technology) analysis method is used to analyse the factors influencing the land development intensity control index of container logistics park, and the index system structure of influencing factors is constructed. Finally, index value is obtained quantitatively with the proposed calculation method of the land development intensity index of the port container logistics park. Its practicability is verified in case analysis.
Źródło:
Polish Maritime Research; 2018, S 3; 61-67
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rationalization of servicing reefer containers in sea port area with taking into account risk influence
Autorzy:
Filina-Dawidowicz, L.
Powiązania:
https://bibliotekanauki.pl/articles/259782.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sea port
reefer container
refrigerated cargo
risk factors
Opis:
This paper is aimed at presentation of a set of methods for rationalization of servicing containerized refrigerated cargoes in sea ports. During servicing reefer containers in port container terminals, take place various combinations of risk factors which can lead to loss of quality merits of cargoes contained in them. In the paper the risk factors capable of influencing quality of cargoes during their servicing in sea port, are identified, and the elaborated model for assessing risk level with the use of assumptions of fuzzy logic theory, is presented. Also, a simulation of servicing reefer containers in port, was performed. Moreover a prototype of an expert system which makes it possible to take correct decisions on servicing reefer containers in sea port, depending on impact level of risk factors, was proposed.
Źródło:
Polish Maritime Research; 2014, 2; 76-85
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A positioning lockholes of container corner castings method based on image recognition
Autorzy:
Shen, Y.
Mi, W.
Zhang, Z.
Powiązania:
https://bibliotekanauki.pl/articles/259938.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
lockholes of container corner
HSV
lockholes positioning
hough transformation
Opis:
This article proposes a method of locating and recognizing lockholes in shipping container corner castings. This method converts the original image of the containers captured by a camera into the HSV (Hue, Saturation, Value) color space. To reduce the influence of the surface color of the containers and lights from the environment on the locating and recognizing algorithm, most noisy points of the image are filtered by binarization and a morphology opening operation to make the features of the containers clearer in the image. Thus, the container body can be separated from the total image. Then, the position and size of the corner castings are defined through calculation based on the international standard of the shipping container size. Lastly, by using this method, we can locate the corner casting in the image by using the General Hough Transform fitting algorithm onto ellipses.
Źródło:
Polish Maritime Research; 2017, S 3; 95-101
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regression formulas for the estimation of engine total power for tankers, container ships and bulk carriers on the basis of cargo capacity and design speed
Autorzy:
Cepowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/259427.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
preliminary design
total power
regression
bulk carrier
tanker
container vessel
Opis:
This article presents regression formulas for the preliminary design of tankers, bulk carriers and container vessels, based on the data of ships built from 2000 to 2018. The formulas could have practical application for the estimation of total engine power by using ship’s deadweight or TEU capacity and speed. The regressions presented in this article are based on the most recent data and were developed for individual sub-types of tankers, bulk carriers and container ships. The presented regressions comply with trends found in the literature and offer greater accuracy for characteristics of new-built ships.
Źródło:
Polish Maritime Research; 2019, 1; 82-94
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Storage allocation in automated container terminals: the upper level
Autorzy:
Xia, M.
Zhao, N.
Mi, W.
Powiązania:
https://bibliotekanauki.pl/articles/258912.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
storage allocation
automated container terminal
upper level model
PSO algorithm
Opis:
Nowadays automation is a trend of container terminals all over the world. Although not applied in current automated container terminals, storage allocation is indispensable in conventional container terminals, and promising for automated container terminals in future. This paper seeks into the storage allocation problem in automated container terminals and proposed a two level structure for the problem. A mixed integer programming model is built for the upper level, and a modified Particle Swarm Optimization (PSO) algorithm is applied to solve the model. The applicable conditions of the model is investigated by numerical experiments, so as the performance of the algorithm in different problem scales. It is left to future research the lower level of the problem and the potential benefit of storage allocation to automated container terminals.
Źródło:
Polish Maritime Research; 2016, S 1; 160-174
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Group-Bay stowage planning problem for container ship
Autorzy:
Shen, Y.
Zhao, N.
Mi, W.
Powiązania:
https://bibliotekanauki.pl/articles/258722.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
container terminal
Group-Bay stowage plan
terminal stowage plan
hybrid GA
Opis:
Stowage planning is the core of ship planning. It directly influences the seaworthiness of container ship and the handling efficiency of container terminal. As the latter step of container ship stowage plan, terminal stowage planning optimizes terminal cost according to pre-plan. Group-Bay stowage planning is the smallest sub problem of terminal stowage planning problem. A group-bay stowage planning model is formulated to minimize relocation, crane movement and target weight gap satisfying both ship owner and container terminal. A GA-A* hybrid algorithm is designed to solve this problem. Numerical experiment shown the validity and the efficiency.
Źródło:
Polish Maritime Research; 2016, S 1; 152-159
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study of dam-break-like tsunami bore impact mechanism on a container model
Autorzy:
Chen, Cheng
Chen, Jun
Lin, Peng
Chen, Chiwei
Chen, Haozhe
Powiązania:
https://bibliotekanauki.pl/articles/260608.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
tsunami bore
dam break
container
Froude number
movement distance
coast slope
Opis:
Tsunami disasters have frequently occurred in recent years. More and more researchers are focusing on this topic. To investi-gate the tsunami bore impact mechanism on a container model, a multi-functional slope-changing tsunami flume is built in this study. To simulate a tsunami bore, a dam-break wave was generated by a free-falling gate in a reservoir. A needle water level gauge and a high-speed camera were used to measure the tsunami wave heights and velocities for different storage water levels in the test flume, and the corresponding Froude numbers of tsunami waves were also calculated. The factors af-fecting the movement distance of the tsunami wave impacting the container model are explored in this experiment, and the results show that the movement distance is positively correlated with the storage water level, and negatively correlated with the container density and the coast slope.
Źródło:
Polish Maritime Research; 2020, 1; 53-59
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiequation models as diagnostic tools for measuring the operational fluidity of the container handling terminal
Autorzy:
Zadrąg, R.
Pac, B.
Powiązania:
https://bibliotekanauki.pl/articles/2073606.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
multi-equation models
simulation
container terminal
modele wielorównaniowe
symulacja
terminal kontenerowy
Opis:
The article presents the continuation of the authors’ research on the problem of the operational fluidity of cargo handling sea terminals, based on the example of the DCT. The article presents a solution based on the multiequation models and applied to analyze the operational fluidity of terminals in the transshipment and feeder relation. To provide a solution to the problem of the functioning of sea-land supply chains at the terminal, the GRETL software has been applied.
Źródło:
Journal of Polish CIMEEAC; 2017, 12, 1; 125--137
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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