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.
This article concerns the assessment of the level of risk at the stage of construction of a seaport, with particular emphasis on selected adverse incidents that can significantly affect the timeliness of the investment. In this article, the matrix method was used to analyse and evaluate the level of risk, and statistical analysis and case studies were used to identify incidents occurring during the port construction project. This allowed the identification of incidents with the highest probability of occurrence during the port construction process and to determine their impact on environmental pollution and the timeliness and success of the investment. The risk analysis performed identified 15 typical incidents of technical nature. The determined risk level for these incidents is at a moderate level or lower, which can be considered acceptable. For all undesirable incidents the values of probability and loss levels have been averaged, because e.g., a fire can have an extremely different dimension and can cause a different scale of losses. Analysis presented in the paper indicate the need to develop procedures for proceeding during the implementation of significant technical tasks to minimize the level of risk of adverse incidents and their consequences.
Purpose: The article presents the issue of the e-waste management on seagoing ships. Characteristics of ship-generated waste in accordance with the international classification in force and the new category (e-waste) was defined in the first part of the article. Furthermore, the principles of its management were analysed in the context of the adopted amendments to Annex V of MARPOL 73/78. The objective of the article is to develop a preliminary concept of the e-waste management model on a seagoing ship, considering the annual variation of ewaste occurrence on ships. Design/Methodology/Approach: The conducted research allowed to develop a concept of the e-waste management model on seagoing ships. The presented model was developed based on available data from both seagoing ships and selected EU ports. The universal character of the model will allow for its wide application and the implementation of its individual stages will ensure appropriate supervision and increase the efficiency of the whole process. Findings: Identification and compilation of the issue of the e-waste management on seagoing ships. The universality of the model allows for its wide application and implementation of its individual stages, both on seagoing ships and in seaports. Practical Implications: A natural consequence of the model will be the implementation of measures which should be predictable to reduce the risk of undesirable events resulting from bad e-waste management practices on seagoing ships. Originality/value: Indication of future research directions improving the functionality solutions on ships model according to the recommendations of the circular economy.
The article concerns the problem of evacuation from passenger ships. It is important because it has not yet been possible to eliminate all the hazards associated with sea travel. In this paper, a concept of a method allowing to determine the arrangement of evacuation routes, for which evacuation time would be minimal, was presented. The genetic algorithm method was used in the calculations, and an original method of coding the considered problem was proposed. Sample calculations were performed to verify the correctness of the proposed algorithm. The results of applying the developed method to calculate the evacuation time on a real passenger ship are presented.
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