长江电子航道图系统下的可航水域动态计算数学模型及算法  

Mathematical Model and Algorithm for Dynamic Calculation of Navigable Waters in the Yangtze River Electronic Channel Map System

作　　者：李紫凝 朱楠 LI Zining;ZHU Nan(Yangtze River Channel Survey Center,Wuhan 430000,China)

机构地区：[1]长江航道测量中心,湖北武汉430000

出　　处：《测绘与空间地理信息》2022年第7期241-244,共4页Geomatics & Spatial Information Technology

摘　　要：基于长江电子航道图技术,研究一种基于长江航道可航性的动态计算数学模型。该模型采用四分法进行有限元划分,使用扫描式声呐法获得河床截面数据,使用水文数据捕捉水面标高数据,使用深度卷积神经元算法获得曲线估计的前瞻数据。2019年数据中,该算法提供的不可航警告较历史记录的110次降低21.8%。且根据原始真实数据分析该模型的评价准确率,发现其敏感性10年内均保持100%,特异性平均为99.1%,准确率平均为99.5%。该模型在水域可航性评价中,具有充分的可靠性、安全性、经济性。Based on the Yangtze River electronic channel map technology,a dynamic calculation mathematical model based on the Yangtze River Channel navigability is studied.The model uses the quartering method to divide the finite element,uses the scanning sonar method to obtain the river bed section data,uses the hydrological data to capture the water surface elevation data,and uses the depth convolution neuron algorithm to obtain the forward-looking data of curve estimation.In the data of 2019,the non-navigable warning provided by the algorithm is 21.8%lower than the 110 times recorded in history.According to the original real data,the sensitivity of the model was 100%,the specificity was 99.1%,and the accuracy was 99.5%in ten years.The model has sufficient reliability,safety and economy in the navigable evaluation of water area.

关 键 词：电子航道图 长江航道 可航性评价 动态算法 数学模型 

分 类 号：P229[天文地球—大地测量学与测量工程]