Journal of Marine Science and Technology最新文献_第6页

A study on berthing and unberthing of a single-shaft ship with a bow thruster 单轴船首推力器靠泊与离泊研究

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-11-06 DOI: 10.1007/s00773-023-00968-z

R. Okuda, H. Yasukawa, N. Hirata, A. Matsuda

引用次数: 0

Experimental study on the dynamical response of elastic trimaran model under slamming load 冲击载荷作用下弹性三体船模型动力响应试验研究

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-11-04 DOI: 10.1007/s00773-023-00969-y

Jin Pan, Wen Zhe Zhang, Zhi Mian Sun, Xue Qu, Ming Cai Xu

引用次数: 0

The accuracy of the mean value engine model affected little by the accuracy of compressor mass flow rate model for a marine diesel engine 船用柴油机压气机质量流量模型的精度对发动机均值模型的精度影响不大

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-11-03 DOI: 10.1007/s00773-023-00971-4

Yuanyuan Tang, Yu Xia, Jundong Zhang, Baozhu Jia, Ruizheng Jiang

引用次数: 0

A study on the implementation of nonlinear Kalman filter applying MMG model 应用MMG模型实现非线性卡尔曼滤波的研究

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-28 DOI: 10.1007/s00773-023-00953-6

Hiroaki Koike, Leo Dostal, Ryohei Sawada, Yoshiki Miyauchi, Atsuo Maki

{"title":"A study on the implementation of nonlinear Kalman filter applying MMG model","authors":"Hiroaki Koike, Leo Dostal, Ryohei Sawada, Yoshiki Miyauchi, Atsuo Maki","doi":"10.1007/s00773-023-00953-6","DOIUrl":"https://doi.org/10.1007/s00773-023-00953-6","url":null,"abstract":"Abstract Many technologies need to be established to realize autonomous ships. In particular, accurate state estimation in real time is one of the most important technologies. In the ship and ocean engineering fields, there have been many studies on state estimation using nonlinear Kalman filters. Several methods have been proposed for nonlinear Kalman filters. However, there is insufficient verification on the selection of which filter should be applied among them. Therefore, this study aims to validate the filter selection to provide a guideline for filter selection. The effects of modeling error, observation noise, and type of maneuvers on the estimation accuracy of the unscented Kalman filter () and ensemble Kalman filter () used in this study were investigated. In addition, it was verified whether filtering could be performed in real time. The results show that modeling error significantly impacts the estimation accuracy of the and . However, the observation noise and types of maneuvers did not have an impact like the modeling error. Thus, we obtained the guideline that and should be used differently depending on the required computation time. We also obtained that keeping the modeling error sufficiently small is essential to improving the estimation accuracy.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":"5 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136161047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of propeller fouling on propulsion performance of an actual ship: a long-term analysis focusing on the power for keeping propeller’s rotation of a controllable pitch propeller 螺旋桨污垢对实际船舶推进性能的影响——以可控螺距螺旋桨保持螺旋桨转动的动力为重点的长期分析

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-28 DOI: 10.1007/s00773-023-00964-3

Hiroaki Torii, Hiroyasu Kifune

引用次数: 0

A digital twin to predict failure probability of an FPSO hull based on corrosion models 基于腐蚀模型预测FPSO船体失效概率的数字孪生模型

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-19 DOI: 10.1007/s00773-023-00963-4

Kennedy L. S. Neves, Raul Dotta, Edgard B. Malta, Alfredo Gay Neto, Guilherme R. Franzini, Luís A. G. Bitencourt

引用次数: 0

Collision probability reduction method for tracking control in automatic docking/berthing using reinforcement learning 基于强化学习的自动靠泊跟踪控制碰撞概率降低方法

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-19 DOI: 10.1007/s00773-023-00962-5

Kouki Wakita, Youhei Akimoto, Dimas M. Rachman, Yoshiki Miyauchi, Atsuo Maki

引用次数: 1

A new approach to study the nonlinear energy transfer rate for an observed wave spectrum using splines 用样条曲线研究观测波谱非线性能量传递率的新方法

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-19 DOI: 10.1007/s00773-023-00965-2

S. Vaishnavi, V. Prabhakar

引用次数: 0

Wearable Sensor-Based Walkability Assessment at Ferry Terminal using Machine Learning: A Case Study of Mokpo, Korea 基于可穿戴传感器的机器学习渡轮码头步行性评估:以韩国木浦为例

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-03 DOI: 10.51400/2709-6998.2700

Jungyeon Choi, Hwayoung Kim

{"title":"Wearable Sensor-Based Walkability Assessment at Ferry Terminal using Machine Learning: A Case Study of Mokpo, Korea","authors":"Jungyeon Choi, Hwayoung Kim","doi":"10.51400/2709-6998.2700","DOIUrl":"https://doi.org/10.51400/2709-6998.2700","url":null,"abstract":"Walkability assessments are becoming more popular, as walking offers numerous health, environmental, and economic benefits to communities. However, previous studies on ferry terminal walkability assessment have been inadequate. This study aimed to develop a wearable sensor system to automatically assess walkability at ferry terminals without conducting surveys. We applied seven machine learning (ML) classifiers to detect different walking environments, including flat ground (FG), downhill slope (DS), uphill slope (US), and uneven surface (UE). The ML models were evaluated across different combinations of classes: 2-class (FG vs. UE), 3-class (U) (FG vs. US vs. UE), 3-class (D) (FG vs. DS vs. UE), and 4-class (FG vs. DS vs. US vs. UE). Among these, support vector machine (SVM) classifiers had the best area under the receiver operating characteristic curves (AUCs) for the 2-class, 3-class (U), and 4-class datasets with 0.970, 0.920, and 0.922, respectively. AdaBoost (AB) performed the best in 3-class (D) with an AUC of 0.953. The least absolute shrinkage and selection operator exhibited better performance in classifying walking environments than maximum relevance and minimum redundancy. This study assessed passenger walkability and improved the built environments at ferry terminals by identifying uncomfortable walking conditions. Furthermore, the results contribute to the development of a passenger walkability evaluation system utilizing intelligent sensors and to the economic revitalization of communities near ferry terminals.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135740100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

APPLICATION OF BLOCKCHAIN TECHNOLOGY IN AQUACULTURE MANAGEMENT 区块链技术在水产养殖管理中的应用

4区工程技术

Journal of Marine Science and Technology Pub Date : 2023-10-03 DOI: 10.51400/2709-6998.2701

Yu-Jen Pan, Hsin-Pei Shieh

{"title":"APPLICATION OF BLOCKCHAIN TECHNOLOGY IN AQUACULTURE MANAGEMENT","authors":"Yu-Jen Pan, Hsin-Pei Shieh","doi":"10.51400/2709-6998.2701","DOIUrl":"https://doi.org/10.51400/2709-6998.2701","url":null,"abstract":"In recent years, food safety has become a growing concern in Taiwanese society. To ensure efficient management of the supply chain within the L Aquatic Products company, it is imperative to employ reliable technical support in establishing an effective traceability management system. The traceability of products can provide managers with valuable insight into the intricacies of the supply chain. By establishing a dependable food traceability system, brand trust can be strengthened, and consumers can inquire about the movement of aquatic products within the supply chain. Blockchain technology offers features such as traceability, accountability, transparency, reliability, trust, privacy, and security, making it a viable solution for the aquatic industry. Although some researchers propose comprehensive solutions for application in aquatic companies, it is important to note that many aquatic firms are traditional companies with unique supply chain requirements. A one-size-fits-all solution may not be suitable and could lead to increased operational costs. In this research, we begin by conducting interviews with the company to gain insight into their actual production processes. Based on these findings, we design and implement a blockchain traceability process tailored specifically to the aquatic firm's supply chain. Additionally, we survey the opinions of the company's staff to ensure that the system aligns with their needs. The results indicate that the blockchain traceability system benefits the company's development.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135740101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0