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Zhang S.-X.,Zhejiang University | Wang Z.-W.,Zhejiang University | Pan C.-X.,Zhejiang Science and Technology College
2010 International Conference on E-Product E-Service and E-Entertainment, ICEEE2010

Illustrated with Qiantang estuary , Hangzhou Bay, the relationship between structure of coastal geomorphology and dissipation of tidal energy were analyzed and the landscape ecological mechanism of watershed flood was studied based on the theory of the landscape ecology and quantitative assessment method of landscape characteristic index. By Correlation analysis and multiple linear regression analysis between reduction rate by tidal range and landscape characteristics indx, such as fractal dimension and shape index, respectively, the close relation between the reduction rate by tidal range and the fractal dimension, shape index was indicated without considering the trend of changes in cross section and the depth. The results showed the greater fractal dimension and shape index were , the more reduction rate by tidal range and tidal energy loss were, which was extremely beneficial to urban flood prevention on the estuary and its upstream. Howere,the serious disturbance or destruction of large-scale development and construction on watershed landscape structure and form made river narrower, form singler, resistance tidal current was suffered reduced, tidal energy increased ,resistance flood was suffered from tidal current increased and drainage more difficulty accordingly et, which mainly caused the degradation of functions of watershed ecological disaster prevention and incerase of urban flood.Finally, the scientific approachs of ecological reclamation which were beneficial to watershed disaster prevention and water environment were discussed. ©2010 IEEE. Source

Dong W.,Zhejiang Science and Technology College | Wang D.,Zhejiang Science and Technology College | Jiang L.,Zhejiang Science and Technology College | Zhu H.,Zhejiang Science and Technology College | And 6 more authors.
Materials Letters

Rhombohedral F-MnTiO3 nanodiscs were synthesized by a facile one-step hydrothermal method using titanate nanowire as Ti source, MnCl 2·4H2O as Mn source and NaF as F source without surfactant. The obtained F-MnTiO3 nanodisc was about 1 μm in diameter and 80 nm in thickness. The element of F, as an electronegative element for electron trapper, enhances the separation ability of photogenerated electron-hole pairs and leads to enhanced photocatalytic activity of F-MnTiO3. The F-MnTiO3 nanodiscs show higher photocatalytic property than MnTiO3 nanodiscs to decompose Rhodamine B under visible light irradiation. © 2013 Elsevier B.V. All rights reserved. Source

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