基于泊松分布的可修复航材库存控制模型研究

在分析可修复航材需求规律的基础上,考虑正规仓库容量大小,结合启用临时仓库条件,提出一种基于泊松分布的可修航材库存控制模型,给出了求解方法,并进行了实例计算,计算结果表面,模型符合航材保障实际,计算简单方便,便于工程应用。     

基于层次分析法的仓库航材保障能力评估研究

首先,分析了现代战争条件下航材保障任务需求;然后,基于对仓库航材保障影响因素的分析,构建了层次结构的航材保障能力评估模型,采用专家打分法和层次分析法,给出了仓库航材保障能力评估结果,并对结果进行了分析;最后,给出了航材保障的建议。     

基于R语言SARIMA模型的航材需求预测分析

采用时间序列SARIMA模型对航材需求进行预测,以2010～2014年某航材实际月需求量数据为基础,运用R语言对航材需求量时间序列进行了稳定性判别;通过定阶和参数估计,构建了航材需求预测模型,并进行了数据预测。结果显示使用SARIMA模型拟合效果较好,预测能力可靠,能为航材部门需求预测提供准确方便的方法。     

基于层次分析法的航材储存安全评价研究

首先根据航材仓储安全的影响因素,建立储存安全评价指标体系;然后给出评价指标权重的计算方法,采用模糊综合评估方法对安全进行总体评估;最后结合实例进行了安全评估,结果表明,指标体系可以对某航材仓库的航材储存工作进行全方位的评价,证明了该方法的可行性与科学性。     

基于层次分析法的航材储存安全评价研究

首先根据航材仓储安全的影响因素,建立储存安全评价指标体系；然后给出评价指标权重的计算方法,采用模糊综合评估方法对安全进行总体评估；最后结合实例进行了安全评估,结果表明,指标体系可以对某航材仓库的航材储存工作进行全方位的评价,证明了该方法的可行性与科学性.     

基于良好率的航材保障经费预测

采用了航材保障良好率作为航材保障的效能指标,建立了航材保障良好率的数学模型。以航材保障经费为资源,平均航材保障良好率达到最大为目标函数,建立了航材保障经费的优化配置模型。用边际分析法求解,并建立了最优递推方程。通过实例演示了如何利用配置模型进行预测,计算工具是Matlab,进行了数值实验和理论分析,结果表明该模型具有良好的优化效果和实用性。     

基于AHP和模糊方法的库存航材ABC分类模型

根据航材部门实际的工作需要将航材的危害度、损耗性、易得性、经济性和任务需求性作为分类准则,通过ABC分类来求解航材对分类准则的权重,然后运用层次分析法计算航材的组合权重,并使用模糊评价的方法计算航材针对各准则的优先分值,再根据组合权重对航材进行ABC分类,该方法用于航材的分类可以快速有效地找出重点航材,提高航材管理工作的针对性和有效性。     

航空物流企业货机A类航材库存管理订货模型研究

针对航空物流企业货机A类航材即关键性航材的库存管理,首先分析其独立季节性需求,建立了货机A类航材订货模型;在建模过程中,基于需求的独立性选择了定量订货策略,应用中心化移动平均法设置了季节性指数,并将其作为需求加权系数;在此基础上,充分考虑订货提前期和期内航材需求量的双重偏离及航材保障率目标,确定了订货点模型,然后基于季节性需求对EOQ模型进行优化,得出一定时期内既能保障航材供应,又符合总成本最小原则的订货量模型。最后采用一个实际算例,验证了该模型能有效实现货机A类航材供应保障和库存管理成本控制两者之间的平衡。     

基于动态规划算法的航材保障经费优化配置

采用了航材保障良好率作为航材保障的效能指标,建立了航材保障良好率的数学模型。以航材保障经费为资源,平均航材保障良好率达到最大为目标函数,建立了航材保障经费的优化配置模型,用动态规划的顺序解法求解,并建立了最优递推方程。将配置模型应用于实例,计算工具是Matlab,进行了数值实验和理论分析,结果证明该模型的优化效果和实用性很好。     

聚类分析在航材分类上的应用

针对航材种类繁多、规格复杂、消耗规律多样导致航材消耗研究较困难的问题,提出采用聚类分析方法根据历年航材消耗数据对大量航材进行分类,为避免量纲的影响采用马氏距离进行样本间相似性度量,为全面反映样本类间的相似性采用离差平方和进行类与类间的相似性度量。算例给出了利用聚类分析方法对一定量的样本进行分类的步骤和方法,结果表明分类效果显著。     

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.     

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.     

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.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.