基于二阶聚类的空域飞行冲突危险性分级评估

飞行冲突危险性评估是空中交通安全管理的重要组成部分,是提升空中交通系统运行安全性与效率的关键手段.以国内外现有飞行冲突评估体系为基础,重新构建动态化的飞行冲突评估体系.通过信息熵给体系中各指标赋权用以描述飞行冲突危险性的影响,并基于实际飞行冲突数据计算飞行冲突危险性时间序列,进而全面分析单个飞行冲突事件以及冲突所在空域的危险性演化过程.最终基于二阶聚类针对空域飞行冲突危险性展开分级评估,有效弥补直接累加对于空域飞行冲突信息的掩盖.     

The growing influence of low-cost carriers in Northeast Asia and its implications for a regional single aviation market

This paper provides an overview of the development of the low-cost carrier (LCC) sector in China, Japan, and South Korea. It is the first paper that documents LCC contributions to the passenger traffic and cheaper fares in Northeast Asia (NEA)'s intra-markets. We argue that a single aviation market can facilitate the growth of the LCC sector, which in turn will make a significant contribution to the NEA connectivity, mobility, and integration. In addition, with a single aviation market, NEA countries can adopt a proactive, unified approach in negotiating air transport agreements with the major aviation partners to maximize the interests of this region as a whole, which will further provide valuable growth opportunities for the LCCs.     

The key risk indicators of road traffic crashes in Serbia,Niš region

Traffic crashes are a serious public health and socio-economic problem, and they are one of leading causes of death of males in Serbia. In order to determine the main causes of road traffic crashes in Ni? region, Republic of Serbia, nine key risk indicators of road traffic crashes are identified, organized into four groups (number and structure of crashes, consequences of traffic crashes, temporal and spatial location of traffic crashes, causes and sanctions), and described in detail. The indicators are ranked based on group fuzzy analytic hierarchy process (AHP), where experts from insurance companies, professionally engaged in the process of risk assessment, with different previous experience present different impact on the final ranking. In relation to the most influential factors in the assessment of traffic crashes, improper and unadjusted vehicle speed, overtaking and passing, as well as the physical condition of the driver have the highest effect.     

A new take on an old structure? Creative and slow tourism in Krakow (Poland)

The contemporary tourism market trends indicate an increasing need for the individualisation of tourist experience and necessitate a move away from the standardisation of tourism products, including those offered within the cities that primarily market their cultural heritage. The concept of creative tourism as a way of practising cultural tourism is a response to the changing needs and expectations of tourists. This is because it offers non-traditional uses for the cultural potential of cities. This article attempts to embed creative tourism in the overall tourist product using an example of a historic city – Krakow. The authors examine the development of tourism products in Krakow, focusing primarily on cultural and historical heritage tourism and secondarily on new forms of tourism that have emerged, such as creative tourism and slow tourism. They analyse this issue in terms of districts – traditional and new tourist areas, indicating the potential for tourism growth.     

北京市交叉路口交通流量分析研究

针对北京市主要交通拥挤的具体问题,分析其基本原因。介绍城市交通流量的特点与计算参数,并列举交通流量的研究方法,通过对北京市交叉路口的交通流量的具体数据进行SPSS数据分析,运用聚类分析、相关分析等手段判断北京市交通拥挤分类的不同原因,并提出控制交通流量的管理对策。     

Route-charging policies for a central European cross-border upper airspace

The introduction of the Central European Air Traffic Services Upper Area Control Centre controlling the upper airspace of several European countries allows different route-charging policies. The impact of three charging scenarios on aircraft operators is examined. It is found that, without a compensatory mechanism, the policy of having different unit rates for each air navigation service provider would adversely affect regional and region-based carriers because the unit rate of the new provider would be significantly lower than the unit rates of the national providers controlling the lower airspaces.     

综合客运交通枢纽分类分级研究

在分析现有研究的基础上,结合城市交通特性和综合客运交通枢纽发展方向,对综合客运交通枢纽定义、分类、分级和规模等问题进行探讨。梳理目前枢纽建设所面临的问题,结合未来城市建设重点以及城市部分功能的调整情况,理清枢纽建设与上述问题之间的内在联系,探讨枢纽的功能定位、分类、分级等问题,为今后综合客运交通枢纽规划建设提供技术支撑,实现不同区域综合客运交通枢纽的差别化布局和规划,促进综合客运交通枢纽系统、区域交通一体化以及社会经济的全面发展。     

玄武岩纤维贫混凝土基本力学性能试验研究

本文通过玄武岩纤维贫混凝土的抗压、抗折试验,研究玄武岩纤维不同掺量对贫混凝土力学性能的影响,并首次在贫混凝土基层中提出玄武岩纤维的合理掺量范围和最佳掺量:合理掺量范围是3-6kg/m3,最佳掺量是4.8 kg/m3。