This paper details the main considerations to be addressed when specifying a swivel for a Floating Production, storage and Off-loading (FPSO) system or other offshore terminal requiring rotational freedom. The followi...
详细信息
This paper details the main considerations to be addressed when specifying a swivel for a Floating Production, storage and Off-loading (FPSO) system or other offshore terminal requiring rotational freedom. The following types of swivels are discussed: electrical swivels for power and control, optical swivels for control/data, hydraulic/pneumatic swivels for control or actuation, and combination units. The detailed design of product swivels is not within the scope of this paper. From the design perspective, typical specifications are discussed for each swivel type, including considerations of capacity, materials, terminations, sealing, weight, torque and position in the swivel stack. Testing and certification for hazardous locations is addressed. The information presented in this paper can be used primarily by designers and systems engineers in specifying swivels, which are used in various FPSO moorings allowing the vessel to weathervane about the mooring point. Several existing swivels are described to demonstrate the functionality available. These include hollow-bore units for systems with product swivels above the electrical or hydraulic swivel. There are a number of tradeoffs to be made when specifying a swivel for FPSO applications. This paper highlights these, enabling the buyer to specify a configuration completely, thus minimizing program changes and cost.
Large form factor is popular in the growth markets of regulated or access intensive application of imaging, banking, medical, financial and insurance. This popularity is attributed to its large storage capacity. Howev...
详细信息
Large form factor is popular in the growth markets of regulated or access intensive application of imaging, banking, medical, financial and insurance. This popularity is attributed to its large storage capacity. However, large form factor, including optical, is just starting to mature. But as opticaladvances, many great things are expected. Large form factor is expected to continue to lead in capacity-with-performance economies of scale.
Nondestructive evaluation (NDE) using X-rays is becoming indispensable for detecting microdefects in new materials currently used in aerospace and other engineering disciplines. Existing X-ray sensors pose limitations...
详细信息
Nondestructive evaluation (NDE) using X-rays is becoming indispensable for detecting microdefects in new materials currently used in aerospace and other engineering disciplines. Existing X-ray sensors pose limitations on the speed of operation due to persistence of the sensor and a problematic tradeoff between the sensor thickness and spatial resolution. To address these limitations we are developing a large area structured CsI(TI) imaging sensor for NDE using CCD based radiographic and computed tomographic systems. The sensor is formed by vapor deposition of CsI(TI) onto a specially designed fiberoptic substrate. Our work has produced X-ray sensors with a factor of 4.5 greater light output, at least three orders of magnitude faster decay time response, and greater spatial resolution (16% modulation transfer function, MTF(f), at 14 linepairs per millimeter (lp/mm)) compared to the currently used high density Tb2O3 doped fiberoptic glass scintillators. These performance advances will address the limitations of existing detector technology by producing high quality images and fast scan times required for real-time NDE inspection. Performance measurements for prototype CsI(TI) scintillator converters are presented. With these new sensors the development of larger area fiberoptic taper based CCD detectors with millisecond data acquisition capabilities and high spatial resolution suitable for NDE applications will be possible.
The author explains the present status and the future trends in the digital video datastorage and computer datastorage markets. Secondly, he briefly discusses the role of opticaldatastorage devices for storing the...
详细信息
The author explains the present status and the future trends in the digital video datastorage and computer datastorage markets. Secondly, he briefly discusses the role of opticaldatastorage devices for storing the digital video data and computer data, and compare with several other storage devices. After he describes the present status of opticaldatastorage for digital video and computer applications, he explains the future prospects for DVD (Digita1 Video Disc) and relating technologies.
The background section of "A Media Maniac's Answer to Where storage Will be in 2000" provides a rich history that applies to this paper. This paper addresses at a high level, the many individual technolo...
详细信息
The background section of "A Media Maniac's Answer to Where storage Will be in 2000" provides a rich history that applies to this paper. This paper addresses at a high level, the many individual technologies available today in the removable storage arena. It discusses recording data on removable magnetic tapes, magnetic floppies, optical disks and optical tape.
Recent advances in opticalstoragetechnology, both two-dimensional and three-dimensional, suggest that optical memories can be used for applications requiring massive archiving volumes. In order to use optical memori...
详细信息
Recent advances in opticalstoragetechnology, both two-dimensional and three-dimensional, suggest that optical memories can be used for applications requiring massive archiving volumes. In order to use optical memories in such applications we need to interface them with electronic computers. Our paper discusses the aspects of this interface design.
In the past, RAID users have often been forced to pay a high price for data security. This price tag has included mediocre performance, administrative headaches, and significant expense. In the recent months, the face...
详细信息
In the past, RAID users have often been forced to pay a high price for data security. This price tag has included mediocre performance, administrative headaches, and significant expense. In the recent months, the face of RAID has begun significant transformation with a new technology called adaptive RAID. Adaptive RAID combines significant firmware and hardware advances to make RAID technology faster, easier to use, and network extendible. The new technology allows automatic conversion between RAID levels and automatic restriping of logical drives without stopping system usage. Adaptive RAID also allows for greater flexibility and management by the system administrator.
optical coherence domain reflectometry (OCDR) is capable of high-resolution imaging inside partially transparent media. Its high sensitivity with good lateral and depth resolution make this technique an excellent cand...
详细信息
optical coherence domain reflectometry (OCDR) is capable of high-resolution imaging inside partially transparent media. Its high sensitivity with good lateral and depth resolution make this technique an excellent candidate for reading opticaldata stored in closely packed layers. This paper describe one choice of storage media resembling that of conventional compact discs, which points out the advantages of OCDR readout. It discusses theoretical models, preliminary experimental results, and some system issues, and compare OCDR and direct detection multilayer readout techniques.
Summary form only given. Recent advances in photonic device technology opens many new opportunities for optical information processing to play an important role in optical information storage, optical information proc...
详细信息
Summary form only given. Recent advances in photonic device technology opens many new opportunities for optical information processing to play an important role in optical information storage, optical information processing, pattern recognition and display. However, a main hurdle of optical information processing is the lack of accuracy and reliability. To overcome this hurdle, accurate test and measurement methods as well as analytical tools must be developed. This talk will focus on various measurement issues at both device and system levels.
Summary form only given. The impressive growth of the opticalstorage market is largely due to the success of the compact disc (CD) system. Initially positioned as a new audio carrier, it now also finds widespread app...
详细信息
ISBN:
(纸本)1557524432
Summary form only given. The impressive growth of the opticalstorage market is largely due to the success of the compact disc (CD) system. Initially positioned as a new audio carrier, it now also finds widespread application as CD-ROM. New systems are expected to further strengthen opticalstorage as a cost-effective and robust technology for data exchange.
暂无评论