Sardine Sardina pilchardus (Walbaum, 1792) and anchovy Engraulis encrasicolus (Linnaeus, 1758), besides being ecologically very important pelagic resources, are also the most numerous fish species in Croatian fisheries landings. Hence, the aim of this study was to compare sardine and anchovy growth parameters: length, length-weight relationship, condition and age population structure. All samples (N=3313) were collected from purse seine catches of eastern Adriatic Sea, during period June 2015 – August 2016. Total lengths of sardine and anchovy ranged from 10.5 to 17.5 cm (average ± SD: 13.94 cm ± 1.07) and from 10.0 to 17.5 cm (average ± SD: 14.09 cm ± 0.88), respectively. Both sardine and anchovy length-weight relationship indicated positive allometry, although allometric coefficient was higher in anchovy (b=3.201) than in sardine (b=3.069). In general, condition of both species grew with fish length. Sardine and anchovy age composition varied from one to five years, while most of the analysed samples belonged to the 3 year class. Growth parameters were for anchovy: L∞=18.36cm; K=0.317; t0= -1.89 and for sardine L∞=19.71 cm; K=0.286; t0= -1.82.
{"title":"Comparison of Growth Parametres Between Sardine Sardina Pilchardus (Walbaum, 1792) and Anchovy Engraulis Encrasicolus (Linnaeus, 1758) from the Eastern Adriatic Sea","authors":"Bosiljka Mustać, Gabrijela Zoja Cukar, A. Vidović","doi":"10.18048/2020.00.24","DOIUrl":"https://doi.org/10.18048/2020.00.24","url":null,"abstract":"Sardine Sardina pilchardus (Walbaum, 1792) and anchovy Engraulis encrasicolus (Linnaeus, 1758), besides being ecologically very important pelagic resources, are also the most numerous fish species in Croatian fisheries landings. Hence, the aim of this study was to compare sardine and anchovy growth parameters: length, length-weight relationship, condition and age population structure. All samples (N=3313) were collected from purse seine catches of eastern Adriatic Sea, during period June 2015 – August 2016. Total lengths of sardine and anchovy ranged from 10.5 to 17.5 cm (average ± SD: 13.94 cm ± 1.07) and from 10.0 to 17.5 cm (average ± SD: 14.09 cm ± 0.88), respectively. Both sardine and anchovy length-weight relationship indicated positive allometry, although allometric coefficient was higher in anchovy (b=3.201) than in sardine (b=3.069). In general, condition of both species grew with fish length. Sardine and anchovy age composition varied from one to five years, while most of the analysed samples belonged to the 3 year class. Growth parameters were for anchovy: L∞=18.36cm; K=0.317; t0= -1.89 and for sardine L∞=19.71 cm; K=0.286; t0= -1.82.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121236830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents state-of-the-art methodologies and methods used in the rationally-based structural design of ships and offshore structures, namely design support system, structural optimization, surrogate modelling and sensitivity analysis. It demonstrates their application in structural design of a platform support vessel. It ends with a list of benefits that a structural designer may expect when the presented methods/methodologies are used. It also shows the obstacles to their full implementation in the engineering practice.
{"title":"Current State of Development of Ship Structural Design and Optimization Methods","authors":"Marin Palaversa, P. Prebeg, Jerolin Andrić","doi":"10.18048/2020.00.13","DOIUrl":"https://doi.org/10.18048/2020.00.13","url":null,"abstract":"This paper presents state-of-the-art methodologies and methods used in the rationally-based structural design of ships and offshore structures, namely design support system, structural optimization, surrogate modelling and sensitivity analysis. It demonstrates their application in structural design of a platform support vessel. It ends with a list of benefits that a structural designer may expect when the presented methods/methodologies are used. It also shows the obstacles to their full implementation in the engineering practice.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114901721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Composite materials are in use in the shipbuilding industry for a long period of time. Composites appear in vast number of fibre – matrix combinations and can be produced with several different production processes. Due to the specific nature of the composite material structure, the selection of the production process and the limitations in the quality control procedures, composite materials will always be subject to defects and imperfections which may, under certain circumstances, lead to the appearance and propagation of cracks. The size and the shape of the crack, the load type and the stress field in the material surrounding the crack will be crucial for crack growth and crack propagation. This paper reviews the composite material damage processes especially relevant for shipbuilding. The basic principles of composite material fracture mechanics are briefly explained, and finally, mechanisms responsible for the development of damage and fracture of composite materials are presented. This paper has emerged from the need to summarize information about composite material fracture and failure mechanisms and modes relevant for the shipbuilding industry.
{"title":"Composite Material Damage Processes","authors":"D. Bolf, A. Zamarin, R. Basan","doi":"10.18048/2020.00.23","DOIUrl":"https://doi.org/10.18048/2020.00.23","url":null,"abstract":"Composite materials are in use in the shipbuilding industry for a long period of time. Composites appear in vast number of fibre – matrix combinations and can be produced with several different production processes. Due to the specific nature of the composite material structure, the selection of the production process and the limitations in the quality control procedures, composite materials will always be subject to defects and imperfections which may, under certain circumstances, lead to the appearance and propagation of cracks. The size and the shape of the crack, the load type and the stress field in the material surrounding the crack will be crucial for crack growth and crack propagation. This paper reviews the composite material damage processes especially relevant for shipbuilding. The basic principles of composite material fracture mechanics are briefly explained, and finally, mechanisms responsible for the development of damage and fracture of composite materials are presented. This paper has emerged from the need to summarize information about composite material fracture and failure mechanisms and modes relevant for the shipbuilding industry.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129209918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an outline and announces the continuation of the Codex Diplomaticus Maritimus Croatiae (Croatian Diplomatic Maritime Codex), consisting of a total of 100,000 documents on Croatia’s presence in the Adriatic and the Mediterranean. Nikola Čolak had started this project in 1956 in Zadar and was developing it for the next 40 years, exploring all the relevant archives on both coasts of the Adriatic that were relevant for not only Croatian history but for everyone else participating in this trade (Italians, Jews, and many others). After the 3rd volume of the Croatian Maritime Regesta was published in 2017, two historians decided to continue, in collaboration with other Croatian and foreign researchers, the publication of the aforementioned series by publishing the 4th volume of this series. The project introduces, as the innovation to the original project, the use of modern technologies related to the processing of digitized data as to allow everyone free access to hitherto unpublished archival sources in regesto as well as in extenso, depending on the importance of the document.
{"title":"Codex Diplomaticus Maritimus Croatiae/Croatian Diplomatic Maritime Codex and the Croatian Maritime Regesta, vol. 4: Emerging project","authors":"Naida Michal Brandl, Zrinka Podhraški Čizmek","doi":"10.18048/2020.58.12.","DOIUrl":"https://doi.org/10.18048/2020.58.12.","url":null,"abstract":"This paper presents an outline and announces the continuation of the Codex Diplomaticus Maritimus Croatiae (Croatian Diplomatic Maritime Codex), consisting of a total of 100,000 documents on Croatia’s presence in the Adriatic and the Mediterranean. Nikola Čolak had started this project in 1956 in Zadar and was developing it for the next 40 years, exploring all the relevant archives on both coasts of the Adriatic that were relevant for not only Croatian history but for everyone else participating in this trade (Italians, Jews, and many others). After the 3rd volume of the Croatian Maritime Regesta was published in 2017, two historians decided to continue, in collaboration with other Croatian and foreign researchers, the publication of the aforementioned series by publishing the 4th volume of this series. The project introduces, as the innovation to the original project, the use of modern technologies related to the processing of digitized data as to allow everyone free access to hitherto unpublished archival sources in regesto as well as in extenso, depending on the importance of the document.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130826502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Pilicic, L. Traven, T. Milošević, I. Kegalj, Ante Skoblar, R. Žigulić
Noise pollution is a significant factor in the modern world. There are many researches dealing with the noise modelling, differing in their purpose, studied influence and the scope of the research, either in geographical terms or in the terms of studied noise sources. The objective of this paper is to give insight in the current state on the field of negative influence that noise has on the environment and/ or human health. Special attention was given to the influence that ports’ noise pollution has on the surroundings, both on the population and on the environment. Within the influence on the environment, underwater noise, which is often excluded when the main priority is the influence on general population, was also included. As it is one of the main tools for analysing the influence of noise, several examples of assessing the influence of the noise using noise maps are presented. Several objectives of the EU Horizon 2020 project (PIXEL), dealing with the reduction of ports’ pollution, were covered. The segment of the project dealing with the noise is linked with the previous achievements, which forms the basis to give some guidelines for the further research of the noise influence on the environment.
{"title":"Noise Pollution – Introduction to the State of the Research and the Implementation in the Horizon 2020 Project Pixel","authors":"S. Pilicic, L. Traven, T. Milošević, I. Kegalj, Ante Skoblar, R. Žigulić","doi":"10.18048/2020.00.11","DOIUrl":"https://doi.org/10.18048/2020.00.11","url":null,"abstract":"Noise pollution is a significant factor in the modern world. There are many researches dealing with the noise modelling, differing in their purpose, studied influence and the scope of the research, either in geographical terms or in the terms of studied noise sources. The objective of this paper is to give insight in the current state on the field of negative influence that noise has on the environment and/ or human health. Special attention was given to the influence that ports’ noise pollution has on the surroundings, both on the population and on the environment. Within the influence on the environment, underwater noise, which is often excluded when the main priority is the influence on general population, was also included. As it is one of the main tools for analysing the influence of noise, several examples of assessing the influence of the noise using noise maps are presented. Several objectives of the EU Horizon 2020 project (PIXEL), dealing with the reduction of ports’ pollution, were covered. The segment of the project dealing with the noise is linked with the previous achievements, which forms the basis to give some guidelines for the further research of the noise influence on the environment.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133327844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Subsea hydrocarbon exploration comprises detection and estimation of shape, depth, volume and other physical properties of hydrocarbon fields within the Earth’s subsurface layers. Marine seismic survey is a process that generally includes sending seismic waves into seabed and recording the intensity and travel time of reflected seismic waves to determine the subsurface features of the Earth. Different methods, equipment and techniques are used to conduct a survey, from sea surface seismic arrays to seabed local seismic station networks. In this paper different widely used seismic methods are presented, together with their advantages and drawbacks. Furthermore, new methods that are being developed and tested for future approach to more advanced and efficient seismic exploration are presented.
{"title":"Analysis of Seismic Methods Used for Subsea Hydrocarbon Exploration","authors":"Ivan Birin, Lovro Maglić","doi":"10.18048/2020.58.05","DOIUrl":"https://doi.org/10.18048/2020.58.05","url":null,"abstract":"Subsea hydrocarbon exploration comprises detection and estimation of shape, depth, volume and other physical properties of hydrocarbon fields within the Earth’s subsurface layers. Marine seismic survey is a process that generally includes sending seismic waves into seabed and recording the intensity and travel time of reflected seismic waves to determine the subsurface features of the Earth. Different methods, equipment and techniques are used to conduct a survey, from sea surface seismic arrays to seabed local seismic station networks. In this paper different widely used seismic methods are presented, together with their advantages and drawbacks. Furthermore, new methods that are being developed and tested for future approach to more advanced and efficient seismic exploration are presented.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study analyses the impact of modern container vessels with capacity of 15.000 TEU1 and more on existing container terminals. Necessary adjustments of terminals are discussed through the aspect of port infrastructure, superstructure and connection with hinterland. The emphasis is on defining the necessary adjustments to enable the berthing of vessels with capacity 15,000 TEU or more. The research highlights the key elements of the container terminal’s enhancements in the Port of Koper, which already receives vessels with a capacity of 15,000 TEU, but encounters restrictions on the acceptance of even larger vessels and larger quantities of containers. The research highlights technical and technological adjustments also through the aspect of intervention and the impact of updates on the environment, the necessary financial inputs and the time component of implementation. The article presents findings that are important for further development of container services and terminals in the North Adriatic area.
{"title":"Impact of Container Vessels Capacity 15.000 TEU and More on Existing Container Terminals","authors":"Peter Čerin, B. Beškovnik","doi":"10.18048/2020.00.03","DOIUrl":"https://doi.org/10.18048/2020.00.03","url":null,"abstract":"The study analyses the impact of modern container vessels with capacity of 15.000 TEU1 and more on existing container terminals. Necessary adjustments of terminals are discussed through the aspect of port infrastructure, superstructure and connection with hinterland. The emphasis is on defining the necessary adjustments to enable the berthing of vessels with capacity 15,000 TEU or more. The research highlights the key elements of the container terminal’s enhancements in the Port of Koper, which already receives vessels with a capacity of 15,000 TEU, but encounters restrictions on the acceptance of even larger vessels and larger quantities of containers. The research highlights technical and technological adjustments also through the aspect of intervention and the impact of updates on the environment, the necessary financial inputs and the time component of implementation. The article presents findings that are important for further development of container services and terminals in the North Adriatic area.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114556919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Road-based electricity increasingly is being considered as an alternative fuel of the future that would replace or reduce dependence on oil and its derivatives, resulting in a reduction at the negative impact on the environment. More and more countries are introducing stricter measures on greenhouse gas emissions, while increasing incentives to buy EVs. This paper looks at the environmental impact of electricity in road transport in ecological, economic, and social terms, highlighting the greater need for more energy efficient EVs than conventional vehicles. The aim of this paper is to emphasize the importance of the application of electricity concerning fossil fuel in road transport, i.e., to describe the impact of EVs on the environment regarding conventional vehicles. Analysis of the use of the EV or the development of electrical infrastructure that is improving and introduced at high speed has shown that only countries with a high standard can monitor trends of EV. Therefore, despite all the advantages of EVs, the strategies and measures adopted by the EU, the implementation of electricity as road transportation fuel does not have a significant echo in countries with a lower standard, at least until the reach and prices of EVs are closer to conventional ones.
{"title":"The Implementation of Electricity as Road Transportation Fuel","authors":"S. Vilke, F. Tadić","doi":"10.18048/2020.58.06","DOIUrl":"https://doi.org/10.18048/2020.58.06","url":null,"abstract":"Road-based electricity increasingly is being considered as an alternative fuel of the future that would replace or reduce dependence on oil and its derivatives, resulting in a reduction at the negative impact on the environment. More and more countries are introducing stricter measures on greenhouse gas emissions, while increasing incentives to buy EVs. This paper looks at the environmental impact of electricity in road transport in ecological, economic, and social terms, highlighting the greater need for more energy efficient EVs than conventional vehicles. The aim of this paper is to emphasize the importance of the application of electricity concerning fossil fuel in road transport, i.e., to describe the impact of EVs on the environment regarding conventional vehicles. Analysis of the use of the EV or the development of electrical infrastructure that is improving and introduced at high speed has shown that only countries with a high standard can monitor trends of EV. Therefore, despite all the advantages of EVs, the strategies and measures adopted by the EU, the implementation of electricity as road transportation fuel does not have a significant echo in countries with a lower standard, at least until the reach and prices of EVs are closer to conventional ones.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131626858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Špiro Ivošević, P. Majerič, Miroslav Vukičević, R. Rudolf
The article presents a study of the possible use of materials with Shape Memory Effect (SME) in shipbuilding, which have two special abilities of transformation and changing shape with changing of temperature or deformation. Among the most well-known SME materials, our study focuses on Ni-Ti and Cu- based alloys. An example of the existing fabrication presents casting of Ni-Ti in the form of a disk, and a new approach – continuous casting of Ni-Ti and CuAlNi alloys in the form of rods. In the article some results are shown of characterisation of microstructure and the basic properties. This was done in accordance with the fact that such scientific approach could define the starting point for further identification of the functional characteristics of these alloys by knowing the their chemical content and microstructure. Numerous studies are being carried out today in order to find the optimal functional characteristics of SME alloys. All of this is aimed at optimising the fabrication of these alloys, with the achievement of suitable properties for application in shipbuilding.
{"title":"A Study of the Possible Use of Materials With Shape Memory Effect in Shipbuilding","authors":"Špiro Ivošević, P. Majerič, Miroslav Vukičević, R. Rudolf","doi":"10.18048/2020.00.20","DOIUrl":"https://doi.org/10.18048/2020.00.20","url":null,"abstract":"The article presents a study of the possible use of materials with Shape Memory Effect (SME) in shipbuilding, which have two special abilities of transformation and changing shape with changing of temperature or deformation. Among the most well-known SME materials, our study focuses on Ni-Ti and Cu- based alloys. An example of the existing fabrication presents casting of Ni-Ti in the form of a disk, and a new approach – continuous casting of Ni-Ti and CuAlNi alloys in the form of rods. In the article some results are shown of characterisation of microstructure and the basic properties. This was done in accordance with the fact that such scientific approach could define the starting point for further identification of the functional characteristics of these alloys by knowing the their chemical content and microstructure. Numerous studies are being carried out today in order to find the optimal functional characteristics of SME alloys. All of this is aimed at optimising the fabrication of these alloys, with the achievement of suitable properties for application in shipbuilding.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134014088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sandi Baressi Segota, N. Anđelić, J. Kudláček, R. Čep
This paper proposes the usage of an Artificial neural network (ANN) to predict the values of the residuary resistance per unit weight of displacement from the variables describing ship’s dimensions. For this purpose, a Multilayer perceptron (MLP) regressor ANN is used, with the grid search technique being applied to determine the appropriate properties of the model. After the model training, its quality is determined using R2 value and a Bland-Altman (BA) graph which shows a majority of values predicted falling within the 95% confidence interval. The best model has four hidden layers with ten, twenty, twenty and ten nodes respectively, uses a relu activation function with a constant learning rate of 0.01 and the regularization parameter L2 value of 0.001. The achieved model shows a high regression quality, lacking precision in the higher value range due to the lack of data.
{"title":"Artificial neural network for predicting values of residuary resistance per unit weight of displacement","authors":"Sandi Baressi Segota, N. Anđelić, J. Kudláček, R. Čep","doi":"10.18048/2019.57.01","DOIUrl":"https://doi.org/10.18048/2019.57.01","url":null,"abstract":"This paper proposes the usage of an Artificial neural network (ANN) to predict the values of the residuary resistance per unit weight of displacement from the variables describing ship’s dimensions. For this purpose, a Multilayer perceptron (MLP) regressor ANN is used, with the grid search technique being applied to determine the appropriate properties of the model. After the model training, its quality is determined using R2 value and a Bland-Altman (BA) graph which shows a majority of values predicted falling within the 95% confidence interval. The best model has four hidden layers with ten, twenty, twenty and ten nodes respectively, uses a relu activation function with a constant learning rate of 0.01 and the regularization parameter L2 value of 0.001. The achieved model shows a high regression quality, lacking precision in the higher value range due to the lack of data.","PeriodicalId":366194,"journal":{"name":"Journal of Maritime & Transportation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122836419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：