Land use and land cover are essential for maintaining and managing the natural resources on the earth surface. A complex set of economic, demographic, social, cultural, technological, and environmental processes usual...Land use and land cover are essential for maintaining and managing the natural resources on the earth surface. A complex set of economic, demographic, social, cultural, technological, and environmental processes usually result in the change in the land use/land cover change (LULC). Pokhara Metropolitan is influenced mainly by the combination of various driving forces: geographical location, high rate of population growth, economic opportunity, globalization, tourism activities, and political activities. In addition to this, geographically steep slope, rugged terrain, and fragile geomorphic conditions and the frequency of earthquakes, floods, and landslides make the Pokhara Metropolitan region a disaster-prone area. The increment of the population along with infrastructure development of a given territory leads towards the urbanization. It has been rapidly changing due to urbanization, industrialization and internal migration since the 1970s. The landscapes and ground patterns are frequently changing on time and prone to disaster. Here a study has been carried to study on LULC for the last 18 years (2000-2018). The supervised classification on Landsat Imagery was performed and verified the classification through computing the error matrix. Besides, the water bodies and vegetation area were extracted through the Normalized Difference Water Index (NDWI) and Normalized Difference Vegetation Index (NDWI) respectively. This research shows that during the last 18 years the agricultural areas diminishing by 15.66% while urban area is increasing by 13.2%. This research is beneficial for preparing the plan and policy in the sustainable development of Pokhara Metropolitan.展开更多
汽车覆盖件尺寸较大、形状复杂,容易因自身重力产生变形,从而对零件在检具上的测量产生影响。GD&T(Geometric Dimension and Tolerance几何尺寸与公差)是测量零件尺寸的依据,其合理与否对零件合格率有重要影响。传统评估GD&T的...汽车覆盖件尺寸较大、形状复杂,容易因自身重力产生变形,从而对零件在检具上的测量产生影响。GD&T(Geometric Dimension and Tolerance几何尺寸与公差)是测量零件尺寸的依据,其合理与否对零件合格率有重要影响。传统评估GD&T的方法是依靠模板和现场经验,准确性和效率不高。为了提高效率,采用数值模拟方法计算零件在基准位置的变形,通过分析基准的变形是否超出图纸公差来评估GD&T是否合理。应用实例表明,采用数值模拟方法评估GD&T能够提高效率,效果良好。展开更多
文摘Land use and land cover are essential for maintaining and managing the natural resources on the earth surface. A complex set of economic, demographic, social, cultural, technological, and environmental processes usually result in the change in the land use/land cover change (LULC). Pokhara Metropolitan is influenced mainly by the combination of various driving forces: geographical location, high rate of population growth, economic opportunity, globalization, tourism activities, and political activities. In addition to this, geographically steep slope, rugged terrain, and fragile geomorphic conditions and the frequency of earthquakes, floods, and landslides make the Pokhara Metropolitan region a disaster-prone area. The increment of the population along with infrastructure development of a given territory leads towards the urbanization. It has been rapidly changing due to urbanization, industrialization and internal migration since the 1970s. The landscapes and ground patterns are frequently changing on time and prone to disaster. Here a study has been carried to study on LULC for the last 18 years (2000-2018). The supervised classification on Landsat Imagery was performed and verified the classification through computing the error matrix. Besides, the water bodies and vegetation area were extracted through the Normalized Difference Water Index (NDWI) and Normalized Difference Vegetation Index (NDWI) respectively. This research shows that during the last 18 years the agricultural areas diminishing by 15.66% while urban area is increasing by 13.2%. This research is beneficial for preparing the plan and policy in the sustainable development of Pokhara Metropolitan.
文摘汽车覆盖件尺寸较大、形状复杂,容易因自身重力产生变形,从而对零件在检具上的测量产生影响。GD&T(Geometric Dimension and Tolerance几何尺寸与公差)是测量零件尺寸的依据,其合理与否对零件合格率有重要影响。传统评估GD&T的方法是依靠模板和现场经验,准确性和效率不高。为了提高效率,采用数值模拟方法计算零件在基准位置的变形,通过分析基准的变形是否超出图纸公差来评估GD&T是否合理。应用实例表明,采用数值模拟方法评估GD&T能够提高效率,效果良好。
