【摘 要】
：
As human activities increase,artificially modified terrain is increasingly widely distributed in road,hydrological,and urban construction.Artificially modified terrain plays an important role in protecting from geological disasters and in the planning and
【机 构】
：
Geographic Information and Tourism College,Chuzhou University,Chuzhou 239000,China;Geographic Inform
论文部分内容阅读
As human activities increase,artificially modified terrain is increasingly widely distributed in road,hydrological,and urban construction.Artificially modified terrain plays an important role in protecting from geological disasters and in the planning and design of urban landscapes.Compared with natural slopes,artificial slopes have obvious morphological characteristics.Traditional modeling methods are no longer suitable for digital elevation model (DEM) modeling of artificial slopes because they often seriously distort the DEM results.In this paper,from the perspective of morphological characteristics,artificial slopes are divided into two types,namely,regular slopes and irregular slopes,based on whether the top and bottom lines of the artificial slope are parallel.Then,according to the morphological characteristics of the two types of slopes,the following DEM construction methods are designed:the first method (perpendicular + inverse distance weighted) is suitable for regular slopes,and the second method (perpendicular + high-accuracy surface modeling) is suitable for irregular slopes.Finally,a DEM construction test is carried out using the artificial slopes in the study area.The results show that for the regular and irregular slopes in the study area,the construction method proposed in this paper has significant advantages in morphological accuracy over the traditional method (triangulated irregular network),and the elevation accuracy method is also superior to the traditional method (using this method,the mean error and standard deviation error of the regular slope DEM are 0.08 m and 0.13 m,respectively,and those of the irregular slope DEM are 0.08 m and 0.06 m).In addition,the top lines and bottom lines can be included in the DEM construction of the background area after processing the elevation information of the boundary line to realize a smooth transition in the boundary between the artificial slope and the background area.
其他文献
利用平均量子Fisher信息度量了在二次方相互作用下体系的相互纠缠的特性,同时也考虑了加上线性相互作用项后体系多体纠缠演化的特点,结果表明在线性和非线性共同作用下自旋体系的多体纠缠保持的时间更久.考虑了体系在噪声影响下的纠缠产生过程,发现即便是有噪声的情况下,原子体系也还具有很高的纠缠度.这对于量子多体纠缠在量子精密测量和量子通信中的应用都有着极其重要的作用.
基于常规紫外-可见光的测定光谱,提出了以Tchebichef曲线矩方法(TM)提取复杂样品中目标组分的特征信息,建立定量模型的分析新策略,应用于何首乌中5种活性目标组分的同时定量分析.建立的TM模型的预测相关系数Rp＞0.98,分析方法的平均加标回收率为82.0％～107.2％.与传统的高效液相色谱定量分析结果相比,TM模型具有简便、快捷的优势;与常见的多元曲线分辨-交替最小二乘法、偏最小二乘法、主成分分析法等化学计量学方法相比,得到的结果更加准确、可靠,证明该模型具有更高的抗干扰能力.
羌科.1井(QK-1)是藏北高原第一口油气地质科学探井,也是目前世界上海拔最高的科探井.通过实施羌塘盆地科探井及其配套地质浅钻,在油气封盖条件、优质烃源岩、油气显示及地层沉积序列等方面取得了一系列新发现.钻探发现了两套区域性优质盖层:雀莫错组(J1-2q)硬石膏层厚达353.8～365.0m,夏里组(J2x)含膏泥质岩厚达230.0～252.0 m.钻井、地震资料及沉积相综合分析表明,这些盖层区域分布连续、稳定,同时油气封盖性能良好,从而证实羌塘盆地具备较好的油气封盖条件.与QK-1配套的地质浅钻揭示,北
Early in the 1930s,two relatively large earthquakes (Kosout,magnitude 6.8,and Talarrud,magnitude 5.8) shook the eastern Mazandaran,northern Iran.Despite the historical and instrumental seismic activity of the eastern region of Mazandaran,little is known a
“Hu Huan-yong Line (Hu Line)” depicts a geographical pattern of China\'s population distribution.Its essence is the regionality of human-land relationship and reflects basic characteristics and laws of human beings\' adaptation to the natural environm
Acid rain is a global environmental issue and causes serious adverse impacts on natural ecosystems and human health.The acid rain and its subsequent impacts have been extensively studied in temperate regions and in big cities globally,but the monitoring o
Mountain tunnels in cold regions are vulnerable to adverse effects of freezing action.Thus,it is necessary to identify the lining responses of shallow mountain tunnels subjected to freezing action.To quantify the influence of freezing action and key desig
Ecological land is an important guarantee to maintain urban ecological security and sustainable development.Although increasing studies have been brought to ecological land,with few explorations of the relative importance of anthropogenic-natural factors
The establishment of reliable age in the lake sediment profile mainly depends on the AMS 14C dating technique.However,the presence of the 14C lake reservoir effects (LREs) restricted for using radiocarbon dating in lake sediment,especially in dry and cold
The Huolin River catchment (HRC) is located in the semi-arid region of Northeast China,which is very sensitive to climate change.The runoff in HRC is closely related to the recovery of local vegetation in the Greater Khingan Mountains and the survival of