Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600)最新文献_第10页

Ocean nutrient enhancer "takumi" engineering and model experiment for upending of long slender steel riser 海洋营养增强器“拓海”工程及长细长钢立管翻转模型试验

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1402938

S. Masuda, M. Yonezawa, M. Morikawa

{"title":"Ocean nutrient enhancer \"takumi\" engineering and model experiment for upending of long slender steel riser","authors":"S. Masuda, M. Yonezawa, M. Morikawa","doi":"10.1109/OCEANS.2004.1402938","DOIUrl":"https://doi.org/10.1109/OCEANS.2004.1402938","url":null,"abstract":"The ocean nutrient enhancer (ONE) is composed of a spar type floating structure from which is suspended a 175 m long compliant steel riser. The ONE was installed at the center of Sagami-Bay in May 2003 for the purpose of discharging density controlled water, which is adjusted by mixing the up-welled deep ocean water (DOW) and surface water, into the euphotic surface layer, in order to investigate the effect of DOW for developing a new fishing ground. The Marino-Forum 21's ONE project was started in 2000. During the conceptual design stage, two types of ONE were studied to reduce the installation cost and site construction duration. One was called \"fix riser type\" and the other was \"pin riser type\". In the selection of the concept, the most important technical aspects were riser fatigue strength and strength during upending. At first, a ridged connection type was examined since the upending of an entire ONE was problematic because of its heavy top. Although the possibility of upending was confirmed by simulation, the concept was not selected. Further investigation indicated that the riser needed to have a very high fatigue strength and construction cost was very expensive. The \"pin riser type\" was finally selected. One of the most difficult technical challenges was that the riser is installed by the upending method. The entire length of the riser is prefabricated at the yard and towed to the site by hanging from a spar buoy and with two additional barges supporting horizontally. At the site, the riser is set to an upright position by the free fall upending method. There was the possibility that a very large bending stress may occur during free fall upending due to the riser's large diameter and weight. The model basin study was performed to establish and confirm the analytical method to simulate suitable riser behavior during towing, installation, operating and especially during free fall upending","PeriodicalId":390971,"journal":{"name":"Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130559781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of motion with echo state network 基于回波状态网络的运动识别

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1405751

K. Ishu, T. Van Der Zant, V. Becanovic, P. Ploger

引用次数: 73

Discussion on CTD measurement technology CTD测量技术探讨

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1405785

Zhang Zhaoying

引用次数: 2

Comparative assessments of peak detection algorithms for underwater laser ranging 水下激光测距峰值检测算法的比较评估

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1405755

Hsin-Hung Chen, Chau-Chang Wang, Fu-Chuan Hung

{"title":"Comparative assessments of peak detection algorithms for underwater laser ranging","authors":"Hsin-Hung Chen, Chau-Chang Wang, Fu-Chuan Hung","doi":"10.1109/OCEANS.2004.1405755","DOIUrl":"https://doi.org/10.1109/OCEANS.2004.1405755","url":null,"abstract":"The cross-section of a laser beam is almost impossible of a perfect circular shape; without doubting most of the cross-sections of laser beams are nearly in ellipse-like form. Therefore, by using an ellipse-like laser beam cross-section for underwater range finding, we are really interested in understanding the quality of range finding with different peak detection algorithms. According to our previous results, we found that the peak detection algorithm of illumination center is good for estimating the location of the laser spot in the image. However, background noise is still a serious problem while selecting a square of pixels for centroid calculation. In this paper, we modified the illumination center to a different algorithm which introduces the technique of the principal component analysis (PCA) to the centroid calculation. This algorithm restricts the selection of pixels to a region within an ellipse for centroid calculation. According to the results of range finding, we found that the ranging quality achieved by using the algorithm of the modified illumination center is much better than that obtained by using the algorithm of the illumination center. Therefore, the algorithm of the modified illumination center is proved to be effective to reduce the effect of background noise on range finding. Also, this result demonstrates that the way of selecting effective pixels for centroid calculation plays an important role.","PeriodicalId":390971,"journal":{"name":"Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600)","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127280825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Sonar image recognition using synthetic discriminant functions implemented with the Karhunen Loeve transform 基于Karhunen - Loeve变换实现的综合判别函数的声纳图像识别

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1405542

V. Riasati, Z. Hui, S. Sepulveda, A. Ellis

{"title":"Sonar image recognition using synthetic discriminant functions implemented with the Karhunen Loeve transform","authors":"V. Riasati, Z. Hui, S. Sepulveda, A. Ellis","doi":"10.1109/OCEANS.2004.1405542","DOIUrl":"https://doi.org/10.1109/OCEANS.2004.1405542","url":null,"abstract":"This paper discusses modified synthetic discriminant functions (SDF) using a Karhunen Loeve transform (KLT) used for improved sonar image recognition. The SDF filter synthesis involves using the whole image which in turn creates redundancies in the distinguishing features. A number of different schemes have been used to try to reduce the data in SDF filters in order to make them more practical, efficient, and reliable. The KLT is one method to reduce the redundancies in a set of training images to create a new data matrix. This data matrix has a new coordinate system in which the axes of the system are in the direction of the eigenvectors of the covariance matrix of the training set. With the realigned data found in the data matrix, the principle component images can be extracted. Principle component images are comprised of the variations of the original training images. This minimizes the training data to the necessary information that is needed for image recognition. The principle component images then become the training set to be used in the SDF filter. Because the KLT allows for the reduction in redundancies by examining only the variations of this new training set, it will increase the correlation found in this implementation of the SDF filter.","PeriodicalId":390971,"journal":{"name":"Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115906388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on stability of a caisson type quay wall by the artificial drain method using recycle material during earthquake 地震作用下回收材料人工排水沉箱式码头墙稳定性试验研究

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1406466

T. Hagiwara, H. Yamazaki, S. Shiraishi, Y. Fukumori, Y. Satoh, T. Hirano, H. Yamada, T. Yamada

引用次数: 2

Field test and numerical simulation on the coastal wind-powered light system 沿海风力照明系统的现场试验与数值模拟

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1406419

T. Nagai, I. Ushiyama, K. Kawanishi, K. Nukada, Y. Suzuki, T. Otsu

引用次数: 0

Power system for the new Jason ROV 新型Jason ROV的动力系统

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1406385

R. Petitt, A. Bowen, R. Elder, J. Howland, M. Naiman

引用次数: 7

Estimation of roll related hydrodynamic coefficients through the free running model tests 通过自由运行模型试验估算滚转相关水动力系数

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1405662

H. Yoon, N. Son, C. Lee

引用次数: 6

Mooring lines with reduced recoil properties - design, analysis and standardization 减小后坐力的系缆。设计、分析和标准化

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Pub Date : 2004-11-09 DOI: 10.1109/OCEANS.2004.1406434

D. Stenvers, W. Wilke, E. McCorkle, R. Chou

引用次数: 4