Taking advantage of remote sensing(RS) technology and geographic information system(GIS) technology to interpret the four periods' data of remote sensing images of Pearl River Estuary in the years of 1990,1995,200...Taking advantage of remote sensing(RS) technology and geographic information system(GIS) technology to interpret the four periods' data of remote sensing images of Pearl River Estuary in the years of 1990,1995,2000,and 2005,the changes in land utilization and landscape layout of Pearl River Estuary have been analyzed with reference to land utilization dynamic model and quantitative method in landscape ecology.Results indicate several points as followings.①Located in the region typical of high-speed economic development,Pearl River Estuary shows noticeable changes in land types and evident spatial temporal difference.During these 15 years,the areas of cultivated land and forests have experienced dramatic decline while the land for construction purposes shows the trend of powerful increase.②On the prospect of variation,landscape metrics have indicated great differences among other landscape pattern indices except for Area-Weighted Mean Patch Fractal Dimension(AWMPFD) especially during the period from 1990 to 1995 which experiences the most obvious changes.③On the prospect of landscape,landscape pattern indices also indicate great changes in the landscape layout of Pearl River Estuary from 1990 to 2005 as well as noticeable increase in the number of patches,and various landscape pattern indices show the increase in the degree of regional landscape fragmentation and increase in diversity.展开更多
PATT方案、VOSTS问卷、DAST(DATT)测试是三种最重要的研究中学生科学技术形象的方法。PATT(The pupils'Attitudes Towards Technology)主要是运用问卷调查、访谈来获得学生对技术的理解和态度。VOSTS(Views on Science-Technology-S...PATT方案、VOSTS问卷、DAST(DATT)测试是三种最重要的研究中学生科学技术形象的方法。PATT(The pupils'Attitudes Towards Technology)主要是运用问卷调查、访谈来获得学生对技术的理解和态度。VOSTS(Views on Science-Technology-Society)是一项对学生关于STS主题的理解的问卷,它由一系列"基于学生经验"的多选题构成。它获取的是学生的观点,是定性的数据,而非定量的分数。DAST(Draw a Scientist Test)和DATT(Draw a Technologist Test),是用绘图的方式来测试学生对科学技术工作人员的印象。展开更多
文摘Taking advantage of remote sensing(RS) technology and geographic information system(GIS) technology to interpret the four periods' data of remote sensing images of Pearl River Estuary in the years of 1990,1995,2000,and 2005,the changes in land utilization and landscape layout of Pearl River Estuary have been analyzed with reference to land utilization dynamic model and quantitative method in landscape ecology.Results indicate several points as followings.①Located in the region typical of high-speed economic development,Pearl River Estuary shows noticeable changes in land types and evident spatial temporal difference.During these 15 years,the areas of cultivated land and forests have experienced dramatic decline while the land for construction purposes shows the trend of powerful increase.②On the prospect of variation,landscape metrics have indicated great differences among other landscape pattern indices except for Area-Weighted Mean Patch Fractal Dimension(AWMPFD) especially during the period from 1990 to 1995 which experiences the most obvious changes.③On the prospect of landscape,landscape pattern indices also indicate great changes in the landscape layout of Pearl River Estuary from 1990 to 2005 as well as noticeable increase in the number of patches,and various landscape pattern indices show the increase in the degree of regional landscape fragmentation and increase in diversity.
文摘PATT方案、VOSTS问卷、DAST(DATT)测试是三种最重要的研究中学生科学技术形象的方法。PATT(The pupils'Attitudes Towards Technology)主要是运用问卷调查、访谈来获得学生对技术的理解和态度。VOSTS(Views on Science-Technology-Society)是一项对学生关于STS主题的理解的问卷,它由一系列"基于学生经验"的多选题构成。它获取的是学生的观点,是定性的数据,而非定量的分数。DAST(Draw a Scientist Test)和DATT(Draw a Technologist Test),是用绘图的方式来测试学生对科学技术工作人员的印象。
