论隐性教育与大学生心理

当前,大学生思想道德观念的显性教育效果似乎很显著,但事实上,显性教育却存在着施教者与受教者之间缺乏互动,教育内容缺乏真实的感受性,教育方法缺乏针对性。大学生心理的特殊性决定了对大学生进行有效的思想道德教育要符合其心理特征;而隐性教育以其间接、侧面的教育方式弥补了显性教育中的不足,与显性教育形成互补,契合大学生心理特点,成为教育过程中重要的内容。     

Living “up in the air”: Meeting the frequent flyer passenger

This paper uses a large database of approximately 37,000 passengers and three different estimates to analyse the characteristics of the frequent flyer and the differences between frequent flyers and occasional flyers. The results show that frequent flyers are middle-aged men with a high level of education who take domestic flights for business reasons at both hub and regional airports, where they make a purchase and/or consume F&B. Frequent flyers fly on both low-cost and traditional airlines, are more likely to stay overnight at a relative's or friend's home and travel to the airport by private or rented car.     

An innovative method to optimize the maintenance policies in an aircraft: General framework and case study

Maintenance policies applied to aircrafts are governed by a mix of airworthiness authorities’ regulations and choices of suppliers and users. This allows airlines to use different strategies to minimize the total costs of maintenance. In this paper, a new approach that integrates the failure and reparation processes, such as modelling, optimization algorithms, and simulation methods, is proposed to define the best maintenance strategies for complex systems.A case study of an airline carrier is presented. In particular, several critical components for the A320 aircraft family are considered. The impact of the spare parts inventory management is discussed. Different preventive maintenance policies are tested and simulated. With the new policies, the average availability of the aircraft is satisfactory and the total annual cost is reduced to a value of approximately 20% in comparison with the previous policies adopted by the company.     

How Does Driver Turnover Affect Motor Carrier Safety Performance and What Can Managers Do About It?

The trucking industry is the lifeblood of supply chains. Truck driver turnover and motor carrier safety are two salient issues affecting this industry. While turnover by itself presents a challenge due to the cost of replacing drivers, it takes on additional urgency because turnover may affect motor carrier safety. However, driver turnover research has focused predominantly on identifying factors affecting turnover, thus resulting in limited understanding of how turnover affects motor carrier performance, particularly with regard to safety. This reduces our ability to provide guidance to managers who have to address driver turnover. In this article, we extend prior research by drawing from several theoretical lenses to develop and test theory of the turnover–safety relationship. Furthermore, we investigate whether carrier managers can mitigate the effect of turnover on safety by embedding knowledge in carriers’ routines using activity control, a formal management control mechanism. We employ a longitudinal data set composed of primary and secondary data sources to test our hypotheses. We find the turnover–safety relationship is best characterized by a monotonic negative attenuated pattern and that high levels of activity control mitigate the negative effect of driver turnover on motor carrier safety in domains more under drivers’ control.     

等效时移随机共振的载波同步

针对随机共振应用于单频载波同步时存在的噪声能量转化不彻底、采样点数量需求高的问题,提出了随机共振等效时移的载波同步方法。首先,通过充分利用接收信号的先验信息,设计样点等效时移过程,降低了载波同步对采样率的需求;其次,通过设计多级迭代的随机共振系统,并设置本地同频方波信号,提高了噪声的转化效率;最后,给出了较为完整的时移校准和时延校准的模块设计。理论分析和仿真结果均表明该方法能够有效地实现载波同步,并较现有方法提高约10 d性能。     

射频信道非线性失真对多载波数字通信的影响及常用线性化技术分析

讨论了信道非线性特性引起的各种失真特性,利用仿真软件比较了信道非线性对单载 波和多载波数字通信的影响,总结并分析了目前常用的信道线性化技术,对于高频段多 载波数字通信系统射频信道的线性化设计具有一定的指导意义。     

高速移动OFDM系统信干比的低复杂差分计算

针对高速移动正交频分复用系统,提出了迭代消除子载波干扰的 信干比差分计算方法。该方法把前后两次迭代的子载波干扰进行差分运算,差分运算值的加 权作为干扰,每次迭代消除子载波干扰后的信号作为有用信号,实现信干比的计算。 误差分析和仿真数据表明：采用这种方法计算信干比可以有效估算出系统信干比,同时算法 复杂度较低。     

基于风险传导视角的金融危机剖析

金融危机的频繁发生,给全球经济造成严重影响。从风险传导的视角出发,通过对传导源、传导载体及传导路径等方面的深入剖析,分析金融政策风险传导的过程,将给金融政策风险管理及金融危机防范提供新的思路。在对比历次金融危机风险传导的过程中,探索其共通规律及差异,为防范金融危机爆发提供有效地建议措施。     

铁路行包运输货物加固分析与方案设计

首先探讨了行包货物进行加固的必要性,然后对加固时涉及的相关因素进行了分析,对行包货物进行了分类,探讨了可采用的加固方法以及加固材料的种类。针对行包运输的两种不同组织方式,提出了加固应遵循的基本原则。最后,对典型货物进行了加固方案的设计。     

浅议美国文化中影响美语词语的几个因素

通过实例可以看到美国文化中历史、个体主义、政治、创新精神对美语词语的影响,作为美国文化信息的载体和美国文化主客观的表现形式的美语词语,真实地反映了美国社会的现实以及美国社会独有的文化特征和风貌.