为了实现施工过程中灌浆质量的动态评价,需要解决由于灌浆孔与检查孔并非一一对应造成的灌浆施工参数与灌浆质量评价指标数据间难以匹配、由于传统事后破坏性试验检测导致的灌浆质量评价指标难以动态获取以及灌浆施工质量难以动态评价...为了实现施工过程中灌浆质量的动态评价,需要解决由于灌浆孔与检查孔并非一一对应造成的灌浆施工参数与灌浆质量评价指标数据间难以匹配、由于传统事后破坏性试验检测导致的灌浆质量评价指标难以动态获取以及灌浆施工质量难以动态评价的问题。因此,本研究提出基于Lévy飞行改进的鲸鱼优化算法(whale optimization algorithm improved by Lévy flight,LWOA)和混合核支持向量机(mixed kernel function support vector machine,MKSVM)的帷幕灌浆施工质量模糊综合动态评价方法。首先,基于分形理论和改进反距离加权平均方法求解了检查孔处灌浆等效施工参数,进而实现了施工参数与评价指标数据间相互匹配,建立了用于训练模型的数据集。其次,结合LWOA具有参数少、收敛速度快的特点以及混合核能够兼顾局部学习和全局泛化的优势,基于LWOA和MKSVM算法实现了灌后透水率、二次渗透指数、裂隙填充率、岩石质量等级和声波波速等评价指标的高精度动态求解。再次,采用模糊综合评价方法对帷幕灌浆施工质量进行模糊综合动态评价分析。最后,以某水电站坝基帷幕灌浆施工质量模糊综合动态评价分析为例,验证了本方法具有高精度和动态性的特性。展开更多
Despite of modern navigation devices, there are problems in navigation of vessels in waterways due to the geographical structures, disturbances in water, dynamic nature, and heavily environmental influenced sea traffi...Despite of modern navigation devices, there are problems in navigation of vessels in waterways due to the geographical structures, disturbances in water, dynamic nature, and heavily environmental influenced sea traffic. Even though all vessels are equipped with modern navigation devices, the accidents are reported caused by various reasons and mainly by human factor according to investigation. We propose an effective and efficient composition collision risk calculation method for finding the collision probability and avoiding the collision between ships in possible collision situations. The proposed composition collision risk calculation method at ship's position using combination of fuzzy and fuzzy comprehensive evaluation methods. The algorithm is straightforward to implement and is shown to be effective in automatic ship handling for ships involved in complex navigation situations. Experiments are carried out with indigenous data and the results show the effectiveness of the proposed approach.展开更多
文摘为了实现施工过程中灌浆质量的动态评价,需要解决由于灌浆孔与检查孔并非一一对应造成的灌浆施工参数与灌浆质量评价指标数据间难以匹配、由于传统事后破坏性试验检测导致的灌浆质量评价指标难以动态获取以及灌浆施工质量难以动态评价的问题。因此,本研究提出基于Lévy飞行改进的鲸鱼优化算法(whale optimization algorithm improved by Lévy flight,LWOA)和混合核支持向量机(mixed kernel function support vector machine,MKSVM)的帷幕灌浆施工质量模糊综合动态评价方法。首先,基于分形理论和改进反距离加权平均方法求解了检查孔处灌浆等效施工参数,进而实现了施工参数与评价指标数据间相互匹配,建立了用于训练模型的数据集。其次,结合LWOA具有参数少、收敛速度快的特点以及混合核能够兼顾局部学习和全局泛化的优势,基于LWOA和MKSVM算法实现了灌后透水率、二次渗透指数、裂隙填充率、岩石质量等级和声波波速等评价指标的高精度动态求解。再次,采用模糊综合评价方法对帷幕灌浆施工质量进行模糊综合动态评价分析。最后,以某水电站坝基帷幕灌浆施工质量模糊综合动态评价分析为例,验证了本方法具有高精度和动态性的特性。
基金supported by ETRI through Maritime Safety & Maritime Traffic Management R&D Program of the MOF/KIMST (2009403, Development of Next Generation VTS for Maritime Safety)supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) (No. 2011-0015009)
文摘Despite of modern navigation devices, there are problems in navigation of vessels in waterways due to the geographical structures, disturbances in water, dynamic nature, and heavily environmental influenced sea traffic. Even though all vessels are equipped with modern navigation devices, the accidents are reported caused by various reasons and mainly by human factor according to investigation. We propose an effective and efficient composition collision risk calculation method for finding the collision probability and avoiding the collision between ships in possible collision situations. The proposed composition collision risk calculation method at ship's position using combination of fuzzy and fuzzy comprehensive evaluation methods. The algorithm is straightforward to implement and is shown to be effective in automatic ship handling for ships involved in complex navigation situations. Experiments are carried out with indigenous data and the results show the effectiveness of the proposed approach.
