数字图像压缩技术的探究

图像压缩技术在多媒体技术领域中占有重要的位置。介绍JPEG及JPEG2000图像编码系统的实现过程,通过Matlab对算法进行仿真,对所得结果进行了分析。     

Model‐based linear clustering

The authors propose a profile likelihood approach to linear clustering which explores potential linear clusters in a data set. For each linear cluster, an errors‐in‐variables model is assumed. The optimization of the derived profile likelihood can be achieved by an EM algorithm. Its asymptotic properties and its relationships with several existing clustering methods are discussed. Methods to determine the number of components in a data set are adapted to this linear clustering setting. Several simulated and real data sets are analyzed for comparison and illustration purposes. The Canadian Journal of Statistics 38: 716–737; 2010 © 2010 Statistical Society of Canada     

‘The World Will Never Be the Same Again’? Reflecting on the Experiences of Jubilee 2000, Mobilizing Globally for the Remission of Unpayable Debts

The emergence of global citizen action has been widely recognized as having become part of the discourse and practice of democratic politics and social change. Jubilee 2000 was a remarkable example of global citizen action, campaigning against unpayable Third World debt. Whilst Jubilee 2000 had novel features, however, the conclusion that ‘the world will never be the same again’ invites further exploration, both in relation to the implications for theoretical debates and in relation to social movements as these have been developing globally, in practice.

This paper starts by summarizing key features of differing approaches to the study of social movements in general and global social movements more specifically. This provides the context for exploring their relevance to the analysis of the experiences and achievements of Jubilee 2000. The evidence comes from published sources and discussion papers and from interviews with particular individuals involved, as staff and activists, in Jubilee 2000 itself and its constituent organizations.     

La norme ISO 45001 et les controverses autour de la régulation transnationale privée de la sécurité et de la santé au travail

Les auteurs analysent la genèse de la norme ISO 45001 sur la sécurité et la santé au travail, une initiative de régulation transnationale privée. Ils décrivent les controverses qui ont surgi à cette occasion, en se fondant sur des entretiens avec des personnes associées à l'élaboration, l'approbation et la diffusion initiale du texte, ainsi que sur une analyse qualitative des documents internes au comité chargé de sa finalisation. À l'instar de normes précédentes sur l'environnement – ISO 14001 – et la responsabilité sociale des entreprises – ISO 26000 –, ce nouvel instrument suscite de vives préoccupations, car il traite de questions politiques, sociales et juridiques déterminantes.     

国际通用三大写拉丁字母缩写词

本文简介三个国际性组织先后制订颁布的三套关于国名地区名代码（其中有一套使用三个大写拉丁字母构成）和关于口岸名及货币名各一套三大写拉丁字母代码,共五套国际标准,以及我国据此制定了相应的国家标准,旁及国际体育界以上述那套三大写拉丁字母国名地区名代码为基础创新的一些国名地区名乃至推广使用于表示球队名的三大写拉丁字母代码,认定其中有的已经被确立为国际通用三大写拉丁字母缩写词。为此建议我国出版的英汉词典应有选择地收录这些缩写词,我国传媒亦应从速熟悉并推广这些缩写词,以便更好地与国际标准和国际惯例接轨。     

Does family matter? Ownership,motives and firms’ environmental strategy

Extant research has primarily focused on the economic drivers and outcomes of corporate environmental performance. This trajectory oversimplifies the motives for environmental strategies across all firm types and particularly overlooks how firm ownership presents other motives for environmental strategies. In this study, we leverage institutional theory to examine how family motives, underpinned by family members' desire to gain or preserve family legitimacy and socio-emotional wealth, affect ISO 14001 certification. Using firm-level data, we find that family ownership has a positive effect on ISO 14001 certification. This effect is stronger for firms whose names include the family name and also for firms located closer to large cities. Our study contributes to nonmarket strategy literature by showing that family motives underpin firms’ environmental initiatives. It also contributes to institutional theory by delineating the levels of legitimacy that spur nonmarket strategy in family firms.     

OBM Today and Tomorrow

Abstract

In this article I present the speech I gave when accepting the OBM Network's award for outstanding achievement. In that speech I characterized the field as I understood it in 1992 and directions I thought it should take in the future, including the role that JOBM should play in that future. The acceptance speech is followed by my extensive commentary and opinion concerning developments in the field of OBM up to the year 2000 and the paths along which I think it should develop and paths I think it should avoid in the future.     

面向流程的MRPII与ISO9000结合模式

首先从管理理念的相似性、管理职能的互补性和实施的关联性角度说明 MRPII与ISO90 0 0结合的可能性和必要性 ,然后提出了以流程为结合点的结合模式 ,并在 MRPII与ISO90 0 0的几个主要流程及其特点分析的基础上 ,给出了 MRPII与 ISO90 0 0结合的框架     

Social Security in Italy

The United States is confronting two simultaneous demographic shifts with profound implications for public policy: population aging and increasing diversity. These changes are accelerating during a dramatic economic downturn, placing entitlement reform prominently on the national policy agenda. Using decennial census data from 2000, this paper examines the nexus of these trends by examining characteristics of Latino baby boomers. In the census data, Latinos constituted 10% of the 80 million boomers; roughly one-third of Latino boomers (37%) were born in the United States or abroad to a U.S. parent; 6% were born in a U.S. territory; 21% were naturalized citizens; and 36% were noncitizens. Compared to non-Latinos, Latino baby boomers had lower levels of education, home ownership, and investment income and higher rates of material hardship and poverty; however, there was considerable variation based on citizenship status. A better understanding of Latino baby boomers will help policy makers anticipate the retirement needs of baby boomers as the United States prepares for the aging of a racially and ethnically diverse population.     

Bayesian Estimation for Quantification by Real-time Polymerase Chain Reaction Under a Branching Process Model of the DNA Molecules Amplification Process

The aim of Quantitative Polymerase Chain Reaction is to determine the initial amount X ₀ of specific nucleic acids from an observed trajectory of the amplification process, the amplification being achieved through successive replication cycles. This process depends on the efficiency {p _n } _n of replication of the DNA molecules, p _n being the probability that a molecule will duplicate at replication cycle n. Assuming p _n  = p for all n, Bayesian estimators of the unknown parameter θ = (p, X ₀) are constructed by Markov Chain Monte Carlo methods under a Bienaymé-Galton-Watson branching model of the amplification process. The Bayesian approach takes into account some prior information on the parameter. Relying on simulated data, the proposed Bayesian estimators and their credibility sets are shown to be quite accurate.