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E. Radu,Ruxandra Balaet,F. Vliegenthart,P. Schipper 대한환경공학회 2010 Environmental Engineering Research Vol.15 No.2
Romania aims to adopt and implement the European Union`s legislation, also including that for the field of water management. Like other countries, groundwater in Romania is locally polluted from point sources, such as leaking landfills, as well as from diffuse pollution sources, include fertilizers, pesticides and leakages from sewers, in urbanized areas. Diffuse pollution can also occur indirectly, by over-exploitation of groundwater wells, resulting in salt water intrusion, as well as from mining and exploitation of mineral aggregates. Romania has quite an intensive monitoring scheme to measure groundwater quality in phreatic and confined aquifers. The purpose of the work resumed in this paper was to derive natural background levels (NBL) for groundwater in order to distinguish the natural elevated concentrations of some substances (natural phenomena) from point and diffuse pollution (anthropogenic phenomena). Based on these NBLs, threshold values (TV) for groundwater will be set according to the requirements of the European Water Framework Directive and the related Groundwater Directive. This paper describes the results of a study for the derivation of NBL and TV in a pilot Groundwater Body. Also, the process and draft results for extrapolating this work for all Romanian groundwater bodies is explained, as well as points for future consideration with respect to monitoring and management.
ALGORITHM FOR DETERMINING 3D CHANGES IN MICRO-GEOMETRY USING IMAGE PROCESSING TECHNIQUES
J.W. SLOETJES,Y.C. TASAN,M.B. DE ROOIJ,D.J. SCHIPPER 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
An algorithm has been developed to determine changes in surface topography on asperity level. The software stitches small but detailed images together to create one large image. If such an image is made before and after an experiment, their difference shows a direct 3D view of the changes in micro-geometry, rather than a change in surface parameters. The algorithm is described in detail and illustrated using artificial as well as real surfaces.
Goodsitt, Mitchell M,Shenoy, Apeksha,Shen, Jincheng,Howard, David,Schipper, Matthew J,Wilderman, Scott,Christodoulou, Emmanuel,Chun, Se Young,Dewaraja, Yuni K The American Association of Physicists in Medicine 2014 Medical physics Vol.41 No.5
<P>To evaluate a three-equation three-unknown dual-energy quantitative CT (DEQCT) technique for determining region specific variations in bone spongiosa composition for improved red marrow dose estimation in radionuclide therapy.</P>
Erickson, Evan M.,Bouzaglo, Hana,Sclar, Hadar,Park, Kang-Joon,Lim, Byung-Beom,Schipper, Florian,Ghanty, Chandan,Grinblat, Judith,Markovsky, Boris,Sun, Yang-Kook,Aurbach, Doron The Electrochemical Society 2016 Journal of the Electrochemical Society Vol.163 No.7
<P>In this work, nickel-rich, layered-structure LiNi0.65Co0.08Mn0.27O2 cathode materials were synthesized and compared with materials of the same overall composition, but with a concentration gradient throughout the particles: the Ni concentration is higher at the center of the particles and lower at surface, while the opposite is true for the Mn concentration. The co-precipitation synthesis parameters were optimized, with two different annealing protocols for the final products and the effect of chelating agent concentration during synthesis examined. The gradientmaterials provided superior capacity and rate capability than their respective non-gradient-materials, at normal operating potentials and temperatures, e.g. 30 degrees C up to 4.3 V vs. Li. The reasons for the improved discharge capacity of the gradient materials were explored through impedance spectroscopy and post-mortem characterization. The gradient structure evolution was examined via TEM and electron diffraction measurements of particle cross-sections. Prolonged cycling, even at elevated temperatures, did not change the initial concentration profiles determined by the synthesis. Additionally, long-term cycling experiments of the second-generation material electrodes vs. graphite electrodes in full cells were performed in order to explore the practical advantage of these novel materials. (C) 2016 The Electrochemical Society. All rights reserved.</P>