航空公司航班延误损失分析

随着我国航空运输业的迅速发展,航班延误问题也日益严重。文章在分析航班延误原因和航空公司运营成本的基础上,利用航空公司财务资料,构建了航空公司航班延误损失模型,并估算了我国五家上市航空公司2007年航班延误损失。最后,对如何降低人为因素的航班延误提出了针对性对策。     

航空公司航班延误损失分析

随着我国航空运输业的迅速发展,航班延误问题也日益严重.文章在分析航班延误原因和航空公司运营成本的基础上,利用航空公司财务资料,构建了航空公司航班延误损失模型,并估算了我国五家上市航空公司2007年航班延误损失.最后,对如何降低人为因素的航班延误提出了针对性对策.     

机场场面飞机滑行调度优化问题的MILP模型及算法

本文考虑了顺序约束、安全约束、起始与终止时间约束和速度约束四种约束,建立了以总滑行时间最小为目标函数的机场场面飞机滑行调度优化的MILP模型。该模型求解分解为两步,先用遗传算法求解各航班经过交叉点的顺序,然后再求解各航班到达各节点的时间。最后结合国内某枢纽机场的航班信息,对模型进行仿真实验,结果表明本文提出的MILP模型有效解决了滑行冲突。     

浅析起飞分析对签派放行重要意义

随着国际航空业的飞速发展，航空公司运行在保证安全的前提下，更加关注进一步降低成本，提高效益。签派放行作为航空公司运行中的重要环节之一，左右着航班运行的安全、效率、效益等因素。签派放行时，重量控制是关键因素之一，而机场分析是重量控制的重要环节。文章通过对起飞分析时影响飞机运行的各种因素进行理论上的分析后，运用对比的方法突出起飞分析在签派放行中的重要作用。     

空运

德国货运航空公司进驻首都机场2012年12月6日,德国货运航空公司正式进驻北京首都国际机场,开通法兰克福至北京航线。德国货运航空公司是一家全货机航空公司,总部设在德国哈恩机场。该航空公司进驻首都机场后,每周一、周四、周六执飞3班航班,执飞机型为波音747—400SF。截至2011年底,北京首都国际机场货邮吞吐量已达到164万吨,运营的全货机航空公司有12家。白云机场新开全货运航班2012年12月18日,广州白云国     

代码共享机理对航空公司经济效益的影响研究

当前代码共享是航空公司之间一种较为普遍的合作方式。对于航空公司来说，代码共享的航班不仅可以降低运营成本，还可以提高客座率，扩大航线网络；对于乘客来说，代码共享航班提供更方便的行李或中转服务。特别是在疫情期间，代码共享优化了航班安排，确保了客运的可达性和有效性，提高了航空公司网络的应急响应能力。因此代码共享是一种广泛应用于缓解供需不匹配的战略。通过研究代码共享对竞争性航空公司定价决策的影响，剖析竞争性航空公司在选择代码共享下的定价决策机理，以帮助航空公司实现收益最大化。     

埃及航空公司全货机首航乌鲁木齐

8月9日，埃及航空公司乌鲁木齐地窝堡国际机场，执行乌鲁木齐至开罗的商业包机航班。这是埃及国家航空公司航班首次飞抵乌鲁木齐机场，也是埃及航空在中国执行的第一架全货机业务。此次货运包机由林德国际物流集团组织运行，该飞机将承载40吨成套电信设备，从乌鲁木齐机场起飞，在亚美尼亚埃里温机场做技术经停后，飞往埃及首都开罗。     

MRP理论在航材备件控制中的应用

库存控制系统是以控制库存为共同目标的相关方法、手段、技术、管理及操作过程的集合,这个系统贯穿于从航材的选择、规划、订货进货、入库、储存及最后出库的一个长过程.航空公司进行库存控制目标一般有如下几点:a)不允许缺货的目标.由于航空公司是面向顾客的服务,为保证航班的正点、正常运行,则必须以不缺货为控制目标;b)库存成本最低的目标.航空公司需要通过降低库存成本以降低运营成本、增加盈利和增加竞争能力所选择的目标;c)限制资金的目标.航空公司航材部门必须在限定资金前提下保证航材供应,这就需要以此为前提进行库存的一系列控制口.     

洛阳机场助航灯光运行中面临的问题分析

洛阳机场是国内为数不多的训运结合的机场之一,同时也是由一个单位同时保障航班和训练的机场.洛阳机场助航灯光同时需要满足航班和训练的运行需求,实际运行过程中势必面临诸多问题,现就洛阳机场助航灯光运行中面临的问题及改进方法进行分析.     

基于灰色预测国内航班延误模型研究

本文从动态演化的视角,研究了有关航班延误的国内外文献,认为影响我国航班延误因素有以下几点:航空公司自身原因、流量控制、天气原因和其他不确定因素。了解到航班延误程度与航班总量成正比。基于灰色预测模型,建立了我国航班延误总量和航班延误因素的时间数列GM(1,1)模型,经检验模型的预测精度可靠,依据所求模型,计算出了2014-2018年的航班总量,预测该时间内航班延误因素的比重,用于预防航班延误等突发状况,从而减少航空公司的损失和旅客们因等待而浪费的时间。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.