Parallel processing based on ship maneuvering in identification of interaction force coefficients

Ship maneuverability, in the field of ship engineering, is often predicted by maneuvering motion group (MMG) mathematical model. Then it is necessary to determine hydrodynamic coefficients and interaction force coefficients of the model. Based on the data of free running model test, the problem for obtaining these coefficients is called inverse one. For the inverse problem, ill-posedness is inherent, nonlinearity and great computation happen, and the computation is also insensitive, unstable and time-consuming. In the paper, a regularization method is introduced to solve ill-posed problem and genetic algorithm is used for nonlinear motion of ship maneuvering. In addition, the immunity is applied to solve the prematurity, to promote the global searching ability and to increase the converging speed. The combination of regularization method and immune genetic algorithm(RIGA) applied in MMG mathematical model, showed rapid converging speed and good stability.

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“…F x , F y , M are resultant forces of hull force, propeller force and rudder force respectively, and these formula are quoted from the Ref. [1].…”

Section: Mathematical Model For Ship Maneuveringmentioning

confidence: 99%

Regularization method and immune genetic algorithm for inverse problems of ship maneuvering

Liu

Huang

Deng

2009

J. Shanghai Jiaotong Univ. (Sci.)

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“…Zhao established a road section vulnerability identification model from the perspective of road network capacity reliability [4] . Liu adopted mobility reliability as a measurement indicator to study the weak road sections and important road sections in the post-earthquake road network [5] . Zhang defined a network efficiency-based road network dynamic vulnerability index for the study of vulnerable road sections [6] .…”

Section: Introductionmentioning

confidence: 99%

Identification of key road sections based on mobility reliability of road network

Zhou

2024

International Conference on Smart Transportation and City Engineering (STCE 2023)

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To recognize the key road sections that significantly impact the operational efficiency of the entire road network, a key road section identification model is developed based on an evaluation of their importance and weakness, taking into account the reliability of road network mobility. According to the definition of the mobility reliability of urban road network, mobility reliability of road section is calculated through the relationship between the saturation and mobility reliability of the road section. By analyzing urban road network structure, path and OD point-to-point reliability can be calculated. Considering the distribution of road network traffic flow ,a mobility reliability model of road network is established. Important road sections are identified through an assessment that considers the connectivity of road sections, road's distance, and the classification of each section.Meanwhile, combined with the mobility reliability, sensitivity analysis is conducted to determine weak road sections. By combining the importance and weakness of the road section, the key sections are identified. A complex network containing expressways, main roads, sub-main roads, and branch roads is used to verify and analyze. The findings demonstrate that the developed model and methodology effectively and accurately distinguish the critical sections. This method can provide reference and basis for the recognition of key road sections.

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“…[5] Liu Jin-ling and others analyzed the land use impact of urban rail transit and proposed that the comprehensive utilization of commercial, advertising, real estate and transport resources would be a feasible channel for the financing of rail transit construction. [6] Based on institutional design and compatibility theory, Lin Mao-de established three dimensions of real estate development framework to improve the TJD implementation mode. [7] In the field of TJD application, a lot of empirical researches focus on the rail transit impact on the land value based on the close interaction of urban transport and land use.…”

Section: Introductionmentioning

confidence: 99%

The Implementation Mode of Urban Rail Based Transit Joint Development — Experiences from United States, Japan and Hong Kong

Sheng

Rong

Song

2011

AMM

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The urban rail based Transit Joint Development (TJD) has become one of the most important financing channels for constructing urban rail transit systems in China. Compared to the extensive research and application in planning field, the implementation of TJD still faced some difficulties such as organizational model selection, distribution of benefits and so on. In the 1980s and 1990s, the United States, Japan and Hong Kong developed a series of TJD practices and they formed three kinds of TJD mode: Public-Private Partnership, Enterprise Oriented, and Franchise. Empirical evidences have shown that differences among three modes are mainly reflected in the selection of implementation agency, allocation of functions and distribution of benefits. Then these distinctions will cause various impacts on the scale, cycle, form and operational management of TJDs. The conclusions of this research could provide valuable experience to the ongoing work of TJD in Chinese mega cities.

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Parallel processing based on ship maneuvering in identification of interaction force coefficients

Cited by 4 publications

References 3 publications

Regularization method and immune genetic algorithm for inverse problems of ship maneuvering

Regularization method and immune genetic algorithm for inverse problems of ship maneuvering

Identification of key road sections based on mobility reliability of road network

The Implementation Mode of Urban Rail Based Transit Joint Development — Experiences from United States, Japan and Hong Kong

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