| Tungsten Speciation in Firing Range Soils |
JAN 2011 |
82 pages |
| Authors:
Jay L. Clausen; Benjamin C. Bostick; Anthony Bednar; Jing Sun; Joshua D. Landis; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH
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 | Synchrotron-based X-ray absorption spectroscopy (XAS) of select surface soil samples obtained from Camp Edwards, Massachusetts, small arms ranges indicate that little tungsten metal remains in the soil and that is not stable in the natural environment. X-ray absorption near edge structure (XANES) studies indicate rapid oxidation of tungsten metal to form tungsten oxides W(VI), polytungstates, tungstates, and polyoxometallates (POM) in any number of forms. Owing to structural similarities, it is ... |
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| Feasibility and Design Implications of Fuel Cell Power for Sealift Vessels |
Aug 2009 |
32 pages |
| Authors:
Jing Sun; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| Fuel cell technologies provide clean and efficient power solutions for both stationary and mobile applications. For shipboard applications, most studies published so far have focused on ship service power or on propulsion power for small vessels with moderate power requirements. Using a military sealift vessel as the platform, this project aims at investigating the implications of implementing fuel cells as the primary power source on a large military cargo ship. ... |
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| Maneuvering in a Seaway |
May 2011 |
17 pages |
| Authors:
Robert F Beck; Jing Sun; MICHIGAN UNIV ANN ARBOR
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| Two codes have been developed to predict maneuvering in a seaway. The first uses a quasi-steady analysis with Fourier decomposition to determine the ship responses and find the optimum path for minimum motions. The second extends the existing body-exact strip theory (UMBEST) to arbitrary paths. Several different controllers, including a model predictive controller with constraint enforcement capability and a back-stepping nonlinear controller with desired stability margins, have been developed that ... |
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| Feasibility and Design Implications of Fuel Cell Power for Sealift Ships |
Jan 2010 |
14 pages |
| Authors:
Jing Sun; John Stebe; Colen Kennell; MICHIGAN UNIV ANN ARBOR DEPT OF NAVAL ARCHITECTURE AND MARINE ENGINEERING
|
| Fuel cell technologies provide clean and efficient power solutions for both stationary and mobile applications. For shipboard applications, most studies published so far have focused on ship service power or on propulsion power for small vessels with moderate power requirements. Using a military sealift vessel as the platform, this project aims at investigating the implications of implementing fuel cells as the primary power source on a large military cargo ship. ... |
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| Comparative Performance Assessment of 5kW-Class Solid Oxide Fuel Cell Engines Integrated With Single/Dual-Spool Turbochargers |
2011 |
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| Authors:
So-Ryeok Oh; Jing Sun; Herb Dobbs; Joel King; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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| The purpose of this study is to investigate the performance of 5kW-Class Solid Oxide Fuel Cell/Gas Turbine (SOFC/GT) hybrid systems with two typical turbine configurations widely used in the gas turbine industry, namely single- and dual-spool gas turbines. Even though their operations are based on the same physical principles, their performance characteristics and operation parameters vary considerably due to different designs. As the most relevant results of an SOFC/GT performance ... |
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