The distribution and marketing of petroleum products are the sources of energy for the various activities of human society and household supply. We spent our time researching the competitive factors to reduce the time...The distribution and marketing of petroleum products are the sources of energy for the various activities of human society and household supply. We spent our time researching the competitive factors to reduce the time of distribution of petroleum products, by setting up a computer system based on Dijkstra’s algorithm our contribution will solve a real problem of delivery with direct targeting of gas stations. We set up a tool to help to map based on the method of operational research starting with the identification of delivery point, mapping and then applying the algorithm. Mainly the graph theory and the optimal path in a network by a short path using the method of Dijkstra for the design we used the UML language, the programming we used the JAVA language with very appreciable results to finish with a conclusion.展开更多
Classical structural reliability analysis of intact ship hulls is extended to the case of ships with collision or grounding damages.Still water load distribution and residual bending moment capacity are included as ra...Classical structural reliability analysis of intact ship hulls is extended to the case of ships with collision or grounding damages.Still water load distribution and residual bending moment capacity are included as random variables in the limit state equation.The probability density functions of these random variables are defined based on random damage parameters given by the Marine Environment Protection Committee of the International Maritime Organization,while the proposed reliability formulation is consistent with international recommendations and thus may be valuable in the development of rules for accidental limit states.The methodology is applied on an example of an Aframax oil tanker.The proposed approach captures in a rational way complex interaction of different pertinent variables influencing safety of damaged ship structure.展开更多
A design of VLCC of the maximum deadweight to pass the Strait of Malacca (Malacca Maximized VLCC) was developed. The loading capacity of 300～500 metric tones deadweight was achieved at a draught able to pass the Stra...A design of VLCC of the maximum deadweight to pass the Strait of Malacca (Malacca Maximized VLCC) was developed. The loading capacity of 300～500 metric tones deadweight was achieved at a draught able to pass the Strait of Malacca. To Achieve high propulsive performance at sea, the hull particulars and the fore section of the hull were designed to prevent the resistance increase in waves and the stern form was optimized using CFD code to maintain low viscous resistance. Moreover, vibration response analysis for the superstructure was carried out using the three dimensional finite element model of the whole ship at the design stage. Measurement results of the vibration response of the superstructure were confirmed under the lower boundary of ISO6954:1984 at the official sea trial.展开更多
文摘The distribution and marketing of petroleum products are the sources of energy for the various activities of human society and household supply. We spent our time researching the competitive factors to reduce the time of distribution of petroleum products, by setting up a computer system based on Dijkstra’s algorithm our contribution will solve a real problem of delivery with direct targeting of gas stations. We set up a tool to help to map based on the method of operational research starting with the identification of delivery point, mapping and then applying the algorithm. Mainly the graph theory and the optimal path in a network by a short path using the method of Dijkstra for the design we used the UML language, the programming we used the JAVA language with very appreciable results to finish with a conclusion.
基金The work of the first two authors has been fully supported by the Croatian Science Foundation within the project lP-2019-04-2085This work contributes to the Strategic Research Plan of the Centre for Marine Technology and Ocean Engineering(CENTEC),which is financed by the Portuguese Foundation for Science and Technology(Fundação para a Ciência e Tecnologia-FCT)under contract UIDB/UIDP/00134/2020.
文摘Classical structural reliability analysis of intact ship hulls is extended to the case of ships with collision or grounding damages.Still water load distribution and residual bending moment capacity are included as random variables in the limit state equation.The probability density functions of these random variables are defined based on random damage parameters given by the Marine Environment Protection Committee of the International Maritime Organization,while the proposed reliability formulation is consistent with international recommendations and thus may be valuable in the development of rules for accidental limit states.The methodology is applied on an example of an Aframax oil tanker.The proposed approach captures in a rational way complex interaction of different pertinent variables influencing safety of damaged ship structure.
文摘A design of VLCC of the maximum deadweight to pass the Strait of Malacca (Malacca Maximized VLCC) was developed. The loading capacity of 300～500 metric tones deadweight was achieved at a draught able to pass the Strait of Malacca. To Achieve high propulsive performance at sea, the hull particulars and the fore section of the hull were designed to prevent the resistance increase in waves and the stern form was optimized using CFD code to maintain low viscous resistance. Moreover, vibration response analysis for the superstructure was carried out using the three dimensional finite element model of the whole ship at the design stage. Measurement results of the vibration response of the superstructure were confirmed under the lower boundary of ISO6954:1984 at the official sea trial.
