In this paper an efficient solution of large scale, interactive terrain visualization is proposed based on graphic hardware. The method of multi-thread is adopted to resolve the bottle-neck problem ...of data fetching from the external memory, and the methods of level of details (LODs) based on view-dependent and mesh rendering in graphics programmable units (GPU) are used to ensure visual quality and high rendering frame rate. Our framework exploits restricted quadtree structure to recursively subdivide a square block by the algorithm of top-down refinement, and takes advantage of the character of GPU vertex texture to render surface in shaders which extremely reduce time spending by parallel processing. Experimental results show that the framework is output sensitive, effective and satisfies the requirements of interactive large scale terrain visualization.
The solid electrolyte interphase (SEI) is a passivation layer formed on an electrode surface that can enhance long-term electrode stability. The inorganic components formed in SEI layer, including ...lithium carbonate and lithium fluoride, play a critical role in terms of providing both mechanical and chemical protection as well as accommodating lithium ion transport. Although lithium carbonate and lithium fluoride have relatively low ionic conductivities, surprisingly, we find that a synthetic composite coating made of both components creates a defect-intensive interface, which significantly improves lithium transport. The synergetic effect of both inorganic components leads yields higher current efficiencies and cycling stability. We envision that the defect-intensive composite coating is a promising artificial SEI layer for the suppression of undesirable side reactions and improvement in the life of lithium ion batteries employing silicon negative electrodes.
We have carried out high-resolution angle-resolved photoemission measurements on the Cebased heavy fermion compound CePt2In7 that exhibits stronger two-dimensional character than the prototypical ...heavy fermion system CeCoIn5. Multiple Fermi surface sheets and a complex band structure are clearly resolved. We have also performed detailed band structure calculations on CePt2In7. The good agreement found between our measurements and the calculations suggests that the band renormalization effect is rather weak in CePt2In7. A comparison of the common features of the electronic structure of CePt2In7 and CeCoIn5 indicates that CeCoIn5 shows a much stronger band renormalization effect than CePt2In7. These results provide new information for understanding the heavy fermion behaviors and unconventional superconductivity in Ce-based heavy fermion systems.
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