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Impact of Rated Power of Power Converter in Energy Storage System on Fuel Consumption to Improve Efficiency of Onboard Generators
No full textThe original simulation verified the fuel-saving effect of the energy storage system for adjusting the load factor of generators to optimal conditions. Through the analysis of the simulation results, it was revealed that the energy storage system showed the potential to save the fuel consumption of generators by more than 600?l in 7?days under certain simulated conditions. This saving was mainly attributed to the reduction of the parallel running time of the generators due to the discharging of the energy storage system. It was also found that the fuel saving effect could be maximized by designing the rated power of the converter appropriately for the energy storage system. ? 2025 The Author(s). IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.公開日: 2025-09-02journal articl
人工知能を用いた時系列データに基づくLNG船スポット運賃の予測に関する研究
Full text link東京海洋大学博士(工学)東京海洋大学博士学位論文 2025年度(2025年9月) 応用環境システム学 課程博士 甲第747号指導教員: 渡部大輔全文公表年月日: 2025-12-02doctoral thesi
海事教育を基にした船舶の遠隔オペレーター訓練の要件化に関する研究
Full text link東京海洋大学修士(海洋科学)東京海洋大学修士学位論文 2025年度(2025年9月) 海運ロジスティクス 修士 第4660号指導教員: 田丸人意全文公表年月日: 2025-12-18master thesi
船舶接岸時の衝突予防援助システムの開発
Full text link東京海洋大学博士(工学)東京海洋大学博士学位論文 2024年度(2025年3月) 応用環境システム学 課程博士 甲第727号指導教員: 岡崎忠胤全文公表年月日: 2025-05-21doctoral thesi
AI手法を利用した船舶画像およびレーダ反射強度画像データによる船種識別に関する研究
Full text link東京海洋大学博士(工学)東京海洋大学博士学位論文 2024年度(2025年3月) 応用環境システム学 課程博士 乙第47号指導教員: 田丸人意全文公表年月日: 2025-05-21doctoral thesi
小さい貫入力で設置可能でより大きな把駐力を発揮する係留システムの提案と貫入抵抗力・把駐力に関する実験的検討
Full text link東京海洋大学修士(工学)東京海洋大学修士学位論文 2024年度(2025年3月) 海洋資源環境学 修士 第4513号指導教員: 野村瞬全文公表年月日: 2025-06-16master thesi
機械学習及び特徴量選択による気象予測の後処理モデルの精度向上
Full text link東京海洋大学修士(工学)東京海洋大学修士学位論文 2024年度(2025年3月) 海運ロジスティクス 修士 第4612号指導教員: 竹縄知之全文公表年月日: 2025-06-13master thesi
Unreal Engineを使用したトラック自動駐車の強化学習
Full text link東京海洋大学修士(工学)東京海洋大学修士学位論文 2024年度(2025年3月) 海運ロジスティクス 修士 第4626号指導教員: 竹縄知之全文公表年月日: 2025-06-13master thesi
数値流体力学 (CFD) モデリングを利用した食品冷凍プロセスの改善
Full text link東京海洋大学博士(海洋科学)東京海洋大学博士学位論文 2024年度(2025年3月) 応用生命科学 課程博士 甲719号指導教員: 渡邊学doctoral thesi
Algal enrichment process for newly formed sea ice in the Dalton polynya off East Antarctica during the late summer–early autumn
No full textNewly formed sea ice can incorporate considerable amounts of organic matter including phytoplankton during its freezing and growth. This initial incorporation influences the standing stocks of ice algae, a fundamental component of high-latitude marine ecosystems. Physical incorporation via the accretion of frazil ice, instead of congelation growth, is considered to incorporate particles efficiently. However, for thin ice (<0.20 m thickness), information on the relationship between ice texture and particle incorporation is scarce. Here, we assessed sea-ice texture (proportion of frazil ice-origin layer), macronutrient concentrations, fraction of snow, and algal composition in Antarctic sea ice and their effects on the enrichment of algae into thin ice in terms of chlorophyll a (Chl a) and biogenic silica (BSi). Chl a and BSi concentrations of thin ice ranged over 0.2–11.6 µg L−1 and 0.5–11.1 µmol L−1, respectively, being significantly concentrated compared to seawater. BSi enrichment in thin ice correlated negatively with the proportion of frazil ice-origin layer, while no relationship was observed with Chl a enrichment. These results suggest that frazil ice could play a minor role in entraining algal cells under certain circumstances, possibly due to the low turbulence and wind speeds of the late summer–early autumn season dampening the interaction between frazil ice and phytoplankton. Algal composition data could suggest that ice algae from the previous winter’s sea ice were released and re-incorporated into the surrounding thin ice on its formation, given the high similarity in species composition observed between older ice and several thin ice samples. This mechanism potentially promotes algal enrichment without the accretion of frazil ice, as indicated by the maximum enrichment in thin ice which developed via congelation growth. Our results show that algal concentration in thin ice could be affected by the presence of old sea ice and hydrographic and meteorological conditions.公開日: 2025-06-0221J1491424KJ000624K1799716J0486820K2337022K1802718F1879417H0631920H0431320H05707journal articl