Risk perception affecting the performance of shipping companies: the moderating effect of China and Korea

Risks in the shipping industry have been highlighted and have attracted significant attention, especially following the bankruptcy of Hanjin in 2017. Due to the decrease in container volume, the business environment for large shipping companies in China has deteriorated. Therefore, major large shipping companies have implemented mixed ownership reform, which provides more opportunities for large Korean shipping companies to enter the Chinese shipping industry. This study first identifies risk perception, specifically focusing on the moderating effect of Chinese and Korean shipping companies, and then demonstrates the impact of these risks on shipping company performance. The results show that market, operational, and technical risks have a negative influence on Chinese shipping companies, whereas market, policy, financial, operations, and technical risks have a negative influence on Korean shipping companies. This study contributes to the fundamental understanding of the effect of risk perception on performance among shipping companies in both countries and calls for further research on risk management plans based on the risk factors identified herein. On a practical level, this study provides an important reference for operators and investors who seek to enter strategic alliances or joint venture in Chinese shipping industry.     

Wave climate evolution in the Bay of Biscay over two decades

As a background, a review of long term evolution of wave climate in the North Atlantic is discussed. Most studies show that interannual evolutions in wave heights may be related to climatic factors, such as the North Atlantic Oscillation Index for example.Data of a waverider, consisting of a time series of 20 years in the Bay of Biscay (off Biscarosse, France), are analysed. Based on these data obtained from 1980, wave heights tend to decrease over the period. Also, interannual evolutions exist, particularly in the wave period. The fact that the annual wave periods at Biscarosse are found to vary more significantly than the annual wave heights led us to assume that it is an indirect effect of the evolution in the location of generating storms relative to the buoy. The relationships between wave parameters and climatic factors such as the North Atlantic Oscillation Index and the Garonne discharge have been derived: they show that the NAO index is negatively correlated with the river discharge and positively correlated with the wave period. This result is in agreement with the general climate scheme associated with NAO cycle proposed by Kushnir et al. [Kushnir, Y., Cardone, V.J., Cane, M., 1995. Link between Atlantic climate variability of surface wave height and sea level pressure. Proc. Fourth Int. Workshop on Wave Incasting and forecasting, Banff, AB, Canada, 59–64.]: NAO+ shifts storm tracks northward and dry weather are encountered in the southern part of Europe (conversely NAO− brings storm tracks and rainfall closer). Concerning wave heights, the lack of dependence on NAO index may be associated with compensation effects between wind intensity and storm tracks: wave energy is partly dissipated while reaching the Bay of Biscay in case of severe but distant storms (NAO+), which is not the case for storms generated nearer to the buoy and associated with moderate westerly winds (NOA−). However, the reason of the decrease in wave heights is not clear.     

高海拔寒区隧道保温材料的选型分析

通过对国内外各种保温材料性能、主要技术指标的对比分析,以在建的高海拔寒区隧道为依托,结合理论计算与数值分析手段,对不同敷设方式下各种保温材料的设置厚度及相同厚度不同材料下的各保温材料效果进行了分析。结果表明,不同材料在相同条件下表现出不同的抗防冻效果,但总体差别不大。实际应用中应在上述研究的基础上,结合其安全性、技术性及经济性等方面综合比选。     

新建兰州北机务段中修厂房组合工艺方案设计

结合兰州北机务段的工程设计实例,对机车中修工艺流程和厂房组合形式进行了探究。针对检修工作量大,建设场地受编组站限制的主要特点,讨论了车体定位修和流水修2种工艺,并通过多角度地对比和分析,得出流水修工艺是适应兰州北机务段需求的最佳方案。与定位修工艺对比,流水修工艺能够有效提高检修能力和作业效率,进而为优化机务设备生产力布局创造了有利条件。     

浙江造船企业现状分析及船舶修造专业建设思考

根据对浙江省造船企业现状的调研,简要分析了浙江造船企业目前存在的一些问题,着重就如何建设船舶修造技术专业提出了建设思路和实施方案.     

浅析我国现时期汽车维修行业现状

分析了我国现时期汽车维修行业的发展现状。     

地铁中压环网数字通信过电流保护方案研究

过电流保护作为地铁中压环网的后备保护,存在级差难以配合的问题,导致保护无选择性。为解决这一问题,提出一种改进方案,即数字通信过电流保护。该方案对中压环网各进出线开关均配置数字通信过电流保护装置,该装置具备通信功能和可编程的逻辑处理功能,相邻装置间通过数据通道对相应信息进行传输和比较,从而对故障信息进行判断。通过对环网不同位置发生的故障进行分析,对方案原理及实现方法进行详细介绍,证明该方案能够准确判断故障范围,并动态调整保护装置的动作时限,能够解决过电流保护的级差配合问题,保证过电流保护的选择性和速动性。     

寒区运营隧道冻害防治监测系统及应用

引起寒区冻害的因素十分复杂,隧道冻害预防与整治是一项复杂而艰巨的工作。以运营的准池铁路杀虎口隧道为工程依托,设计合理的冻害防治监测系统,通过对监测结果的分析,预测冻害的重点防治范围。研究结果表明:距洞口500 m范围内围岩有冻结可能,围岩最大冻结深度1.55 m,排水量较大区段位于下坡端进口段1 300 m范围内,因此冻害重点防治区段为进口端500 m范围内的软岩区段,预测冻害类型以衬砌渗漏水、衬砌开裂为主。     

无砟轨道电磁特性仿真分析

分析客运专线无砟轨道钢筋混凝土结构对钢轨周围的电磁环境的影响,得出了钢筋磁导率、轨底与上层钢筋之间距离对钢轨上方磁场分布情况的影响。介绍轨面电磁环境的改变对机车信号接收线圈产生的影响。仿真在考虑牵引回流中谐波和噪声成份的情况下,钢轨周围磁场的分布情况。     

深圳北站综合枢纽在"高铁链接城市"中的探索

深圳北站是深圳的高铁火车站,高铁如何与城市链接,突破传统火车站的模式,是深圳北站综合枢纽建设过程中积极探索研究的重要课题.从总体布局、轨道交通规划,功能布局设计等方面,分析深圳北站综合枢纽的设计方案,并总结和提炼出深圳北站综合枢纽设计中贯穿的"八大理念".