The partition of polygon based on line of sights is analyzed,then the concepts of key events of gap and window about viewshed in polygon are delivered.
分析了基于视线扫描的多边形分割情况,进而提出了视域的沟、窗口等概念,分析了沟变化的关键事件,通过对沟的关键事件的形式化描述和处理,在有关的引论下给出了多边形点视域具体的解决方法,此方法的复杂度与多边形的拐点相关。
Based on morphological characteristics of gully heads, this paper applied fractal geometrical theory to analyze fractal curvature and fractal dimension of soil particle-size distribution of the gullies investigated, and discovered the correlation between gullies morphology and development under different land-use patterns.
从冲沟沟头形态学特征的角度,运用分形几何学理论,以金沙江干热河谷元谋盆地的冲沟为研究对象,对沟头的分形弯曲度和土壤分形特征进行分析,揭示不同土地利用方式下,沟头空间形态、土壤形态与冲沟发育的相关关系及不同沟头形态所反映的自然环境特征差异性,这对研究冲沟的空间格局和动态监测提供了新的思路,对冲沟侵蚀治理,防止土地劣化具重要的理论指导意义。
The two 1080-m3 blast furnaces in the Ironworks successively went into operation at the end of 2005,the frontside main runner being of semi-pouring,semi-ramming mix.
莱钢炼铁厂银山前区2×1080m3高炉于2005年底相继投产,炉前主沟为半浇注、半捣打料混合主沟。
In order to meet the requirement of high strength smelting,the sand hole of 700 m3 BF main runner is modified.
为了适应高强度冶炼的需要,对700m3高炉主沟砂口进行了改进。
Damage causes of main trough of BF are analyzed by manufacturing and maintenance of main trough .
通过主沟的砸制与维护实践,分析主沟损坏的原因,探讨适合南钢高炉主沟制作、使用的思路,为高炉强化冶炼提供良好的外围环境。
In order to increase the hot metal throughput of main trough, some reforms to the trough were carried out, and in order to realize zero-interval tapping and meet the needs for smooth operation and intensified smelting of BF, the management and maintenance of taphole were strengthened at Maanshan Steel's 2500 m~3 BF.
马钢2500m~3高炉通过对渣铁沟进行技术改造,增加了主沟通铁量;通过加强铁口管理与维护,实现了零间隔出铁,满足了高炉强化冶炼的需要。