Results 61 to 70 of about 466,509 (186)

Deep-reinforcement-learning-based hull form optimization method for stealth submarine design

International Journal of Naval Architecture and Ocean Engineering
The stealth performance of submarines is closely related to their hull forms. In this study, an optimization method based on Deep Reinforcement Learning (DRL) was developed to design submarine hull forms, aimed at maximizing the stealth performance.
Sang-Jae Yeo, Suk-Yoon Hong, Jee-Hun Song   +2 more
doaj   +1 more source

Type IIB Colliding Plane Waves

, 2003
Four-dimensional colliding plane wave (CPW) solutions have played an important role in understanding the classical non-linearities of Einstein's equations.
A. Feinstein, A. Feinstein, A. Lawrence, A. Ori, A. Ori, A. Ori, A. Ori, A.A. Kehagias, Boris Pioline, C.J.S. Clarke, D. Berenstein, D. Berenstein, D. Marolf, D. Marolf, E. Kiritsis, H. Liu, H. Liu, J. Kowalski-Glikman, J.B. Griffiths, J.b. Griffiths, K.A. Kahn, L.M. Burko, M. Blau, M. Blau, M. Blau, M. Gurses, M. Gurses, M. Gurses, Michael Gutperle, P. Bell, P. Szekeres, R. Geroch, R.A. Matzner, R.H. Gowdy, S. O'Brien, T. Dray, U. Yurtsever, V. Bozza   +37 more
core   +4 more sources

Predictive Model for Hydrostatic Curves of Chine-Type Small Ships Based on Deep Learning

Journal of Marine Science and Engineering
Capsizing accidents are regarded as marine accidents with a high rate of casualties per accident. Approximately 89% of all such accidents involve small ships (vessels with gross tonnage of less than 10 tons).
Dongkeun Lee, Chaeog Lim, Sang-jin Oh, Minjoon Kim, Jun Soo Park, Sung-chul Shin   +5 more
doaj   +1 more source

Reconsideration of IMO’s Maneuvering Performance Standards for Large Fishing Vessels

Journal of Marine Science and Engineering
This study evaluates the applicability and limitations of the International Maritime Organization (IMO)’s maneuvering standards (MSC.137(76)) for large fishing vessels under 100 m in length, which are not currently included in the regulation.
Su-Hyung Kim, Min-Gyu Lee
doaj   +1 more source

Generalized permutohedra in the kinematic space

, 2020
In this note, we study the permutohedral geometry of the poles of a certain differential form introduced in recent work of Arkani-Hamed, Bai, He and Yan. There it was observed that the poles of the form determine a family of polyhedra which have the same
Early, Nick
core  

Connection between type B (or C) and F factorizations and construction of algebras

, 2002
In a recent paper (Del Sol Mesa A and Quesne C 2000 J. Phys. A: Math. Gen. 33 4059), we started a systematic study of the connections among different factorization types, suggested by Infeld and Hull, and of their consequences for the construction of ...
A Del Sol Mesa, Abramowitz M, Alhassid Y, Alhassid Y, C Quesne, Cariñena J F, Del Sol Mesa A, Del Sol Mesa A, Gangopadhyaya A, Haymaker R W, Schiff L I   +10 more
core   +1 more source

Resistance prediction of innovative semi SWATH design concept in shallow water [PDF]

, 2015
Many analysis have been conducted to evaluate performance of High Speed Craft (HSC). One of the important analysis is resistance analysis of multihull in shallow water. Ship operating in shallow water experiences increasing of resistance due to change in
Ahmed, Yasser M., Ali, Arifah, Maimun, Adi, Rahimuddin, Rahimuddin   +3 more
core  

Development of Low Wake Wash Hull Form

Jurnal Teknologi, 2015
Wake wash has become a significant issue in the ship design industry due to its impact on the environment in terms of erosion of natural shoreline wetlands. Many ideas for reducing wake wash have been introduced. This research work presents the development of a low wake wash catamaran hull form.
Yaakob, O. B., Ahmed, Y. M., Abd. Rahman, M. M., Elbatran, A. H.   +3 more
openaire   +2 more sources

Wave-induced loads on cross-deck of a wave-piercing trimaran with different hull forms of outriggers

Transport, 2019
Trimaran has unique hull form with a rapidly growth in recent years due to its application as a mode of transports and naval vessels. Designing trimaran faces many technical challenges because of its complex structural outlines and high-speeds operation.
Abolfath Askarian Khoob, Mohammad Javad Ketabdari   +1 more
doaj   +1 more source

Wave Analysis of Simple Hull Form

Journal of the Society of Naval Architects of Japan, 1969
We can examine the validity of the wave-making resistance theory by the method of wave analysis. In order to investigate the discrepancy between the theoretical and experimental free wave spectrum, wave analysis was carried out for three Inuids, M-6, M-7 and M-8, at the speeds K0L=14, 12, 10, 8 and its results were compared with theory.
openaire   +2 more sources