Experimental study on the pressure-generation efficiency and pressure-seal mechanism for large volume cubic press

2018 ◽  
Vol 89 (7) ◽  
pp. 075106 ◽  
Author(s):  
Jiawei Zhang ◽  
Fangming Liu ◽  
Jingjun Wu ◽  
Yinjuan Liu ◽  
Qiwei Hu ◽  
...  
2002 ◽  
Vol 89 (8) ◽  
pp. 1003-1007 ◽  
Author(s):  
A. D. Strickland ◽  
P. J. Clegg ◽  
N. J. Cronin ◽  
B. Swift ◽  
M. Festing ◽  
...  

Author(s):  
Rodolfo T. Gonc¸alves ◽  
Guilherme F. Rosetti ◽  
Andre´ L. C. Fujarra ◽  
Kazuo Nishimoto ◽  
Allan C. Oliveira

A great deal of work has been developed on the spar and monocolumn vortex-induced motion (VIM) issue. However, there are very few published works concerning VIM of semi-submersible platforms, partly due to the fact that VIM studies for this type of platform recently became interesting particularly due to the increasing semi-submersible dimensions (columns diameter and height. In this context, a meticulous experimental study on VIM for this type of platform concept is presented here. Model test experiments were performed to check the influence of many factors on VIM, such as different headings and hull appendages. The results comply with in-line, cross-flow and yaw motion amplitudes, as well as with combined motions in the XY plane.


Author(s):  
Rodolfo T. Gonçalves ◽  
Guilherme F. Rosetti ◽  
André L. C. Fujarra ◽  
Kazuo Nishimoto ◽  
Allan C. Oliveira

Aiming to complete the results presented before by Gonçalves et al. (2011) – Experimental Study on Vortex-Induced Motions (VIM) of a Large-Volume Semi-Submersible Platform, OMAE2011, the present work brings new experimental results on VIM of a large-volume semi-submersible platform, particularly concerning its coexistence with waves in the free surface. The VIM tests were performed in the presence of three regular waves and also three different conditions of sea state. According to the results, considerable differences between the presence of regular or irregular waves were observed. The motion amplitudes in the transverse direction decreased harshly when the regular waves were performed and no VIM was observed. In the case of sea state condition tests, the amplitudes decreased slightly but a periodic motion characterized by the VIM was observed. The results herein presented concern transverse and yaw motion amplitudes, as well as spectral analyses.


2010 ◽  
Vol 7 (4) ◽  
pp. 388-394 ◽  
Author(s):  
Baoshan Wang ◽  
Wei Yang ◽  
Songyong Yuan ◽  
Shijun Guo ◽  
Hongkui Ge ◽  
...  

Author(s):  
Marlisa Sigita ◽  
Ali Ridho Barakbah ◽  
Entin Martiana Kusumaningtyas ◽  
Idris Winarno

The increasing number of online news provider has produced large volume of news every day. The large volume can bring drawback in consuming information efficiently because some news contain similar contents but they have different titles that may appear. This paper presents a new system for automatically generating representative news using on-line clustering. The system allows the clustering to be dynamic with the features of centroid update and new cluster creation. Text mining is implemented to extract the news contents. The representative news is obtained from the closest distance to each centroid that calculated using Euclidean distance. For experimental study, we implement our system to 460 news in Bahasa Indonesia. The experiment performed 70.9% of precision ratio. The error is mainly caused by imprecise results from keyword extraction that generates only one or two keywords for an article. The distribution of centroid’s keywords also affects the clustering results.Keywords: News Representation, On-line Clustering, Keyword Aggregation, Text Mining.


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