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KdV-Burgers方程的小波Galerkin法数值解
  • 期刊名称:桂林电子科技大学学报,30:4(2010),359-362
  • 时间:0
  • 分类:TP391[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
  • 作者机构:[1]重庆工商大学旅游与国土资源学院,重庆400067, [2]重庆市发展信息管理工程技术研究中心,重庆400067
  • 相关基金:国家水体污染控制与治理科技重大专项(2009zx07104-003);国家自然科学基金(10871217);重庆市教委项目(KJ100703)和重庆工商大学科技创新基金项目(31994631)共同资助.
  • 相关项目:传输理论和随机服务系统中的矩阵问题及其有效算法研究
中文摘要:

以三峡库区(万州地区)为例,研究了三峡库区万州区景观总体格局以及各景观类型格局的演变规律;利用万州区1995、2000、2006、2009年的TM影像,在3S技术支持下,结合重庆市生态环境特征,利用计算机自动分类和目视判读的方法,将影像数据矢量化,并对多样性指数、均匀度指数、优势度指数、破碎度指数、分维数指数5类景观格局指数进行了详细的分析;结果表明:研究区在14年间景观类型主体没有显著变化,仍然以耕地和林地为主,但耕地优势度总体趋于减少,林地得以回升;景观受到人为干扰因素增强,斑块形状趋于规整;景观整体稳定系数增强,景观向着多样化、均匀化发展。

英文摘要:

Taking Three Gorges Reservoir area (Wanzhou District) as an example, this paper studies the evolution law of overall landscape pattern of Wanzhou District and each landscape pattern type, makes image data vector by using TM images of Wanzhou District in 1995,2000,2006 and 2009, based on 3S technology and the characteristics of eco-environment of Chongqing and by using computer automatic classification and visual identification method, and analyzes, in detail, five index, dominance index, fragmentation index and indexes of landscape pattern such as diversity index, evenness fractal index. The results indicate that the subject of landscape pattern in the studied area does not have obvious change in 14 years, that the area of Wanzhou District is mainly still occupied by cultivated land and forestland, however, cultivated land is decreasing and forestland is rising, that the factors'of human intervention to landscape are increasing and patch shape is structured, and that overall landscape stabihty coefficient is enhanced and the landscape develops toward diversity and evenness.

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