城市物流共同配送模式与系统架构设计研究

近年来,随着物流配送行业业态的不断进化和发展,配送方式和效率与城市规划之间的矛盾已成为城市物流发展的主要问题。随着电子商务技术和物联网技术的快速发展,企业间配送方式的转变也成为一种必然。共同配送模式作为一种高效率的配送模式因此应运而生。本文对区域城市物流的共同配送模式进行了详细的研究,并提出了一种新型的共同配送模式,同时在共同配送系统的设计上又提出了一种新的设计步骤。     

INTERFACING FEMINISM AND CULTURAL STUDIES IN HONG KONG: A CASE OF EVERYDAY LIFE POLITICS

Cultural studies, as a cultural and political re-articulation of common sense, knowledge and community practices, aims at opening up new cultural space for criticisms, reflections and action. Originating from the women' movement and later flourishing in the academy as well, feminism espouses similar aims to cultural studies. Both cultural studies and feminist/gender studies have a strong sense of intervening into everyday life politics. This paper is an attempt to discuss how feminism and cultural studies interface with each other, largely based on examples of gender-related everyday life politics taken from the feminist movement in Hong Kong. It will examine issues concerning the conflict of consumption and female subjectivities, the reconceptualization of home and housewives, and the representation of everyday life for women and history writing. It is argued that by blurring, negotiating or deconstructing the boundary or division between positions, identities and domains–such as subject and object, housewives and workers, private and public, personal and political, consumption and production–the re-articulation of knowledge about ‘victim’, ‘exploitation’, ‘home’ and ‘history’ in the feminist movement will not only provide the movement with new impetus and insight to reconsider its strategies in fighting for more cultural, social and economic space for women and other marginal groups at large in Hong Kong, but will also ‘metabolize’ the newly developed discipline of cultural studies in Hong Kong by providing a platform to strengthen the dynamic arm of cultural studies education and research. Based on her feminist and teaching experiences in Hong Kong, the author has highlighted activism and pedagogy as the two important dimensions of feminism and cultural studies in this paper.     

A Dynamic Model of Welfare Reform

A dynamic structural model of labor supply, welfare participation, and food stamp participation is estimated using the 1992, 1993, and 1996 panels of the Survey of Income and Program Participation. Details of various policies including welfare time limits, work requirements, and Earned Income Tax Credit (EITC) are incorporated formally in the budget constraint. Policy simulations reveal that the economy accounts for half of the increase in the labor supply of female heads of family between 1992 and 1999. A time limit results in a larger efficiency gain than a work requirement or a direct reduction in welfare benefits. A reform package can lead to both a reduction in the government expenditure and an improvement in utility. The EITC expansion results in a substantial efficiency gain among individuals with the lowest expected wage. These individuals are almost unaffected by the economic expansion, but their income and utility increase significantly under the reform package.     

Examining Parental Monitoring as a Pathway From Community Violence Exposure to Drug Use,Risky Sex,and Recidivism Among Detained Youth

ABSTRACT

This study examined whether parental monitoring mediated the relationship between community violence exposure and a spectrum of behaviors such as recidivism, risky sex, and drug use among youth with a history of being detained. It also explored whether risk pathways differed by gender. Adolescents (n = 550) who were detained or previously detained were recruited from eight regional detention facilities in Georgia. Audio computer-assisted self-interviewing technology was used to assess demographic factors (i.e., age, race, and socioeconomic status), risky sex, drug use, and recidivism prior to being detained. Major findings indicated direct relationships between community violence exposures and risky sex and drug use in the 2 months prior to being detained. Findings also indicated that parental monitoring mediated these relationships for both adolescent males and females. These findings document that parental monitoring is an important element even for troubled youth across a broad spectrum of risk factors. Consequently, it is recommended that intervention programs examine the differential effects of monitoring behaviors by a variety of groups such as parental figures, teachers, and peer mentors.     

欧洲与亚洲对二战的记忆反思

简要介绍了欧洲二战记忆研究的主流理论和研究方法,探讨欧洲二战记忆的历史性演变, 并以中日为例子来谈东亚二战记忆的历史性演变。二战在欧洲基本上已经成为了历史的一部分,可是在东亚,二战与区域事务还是有着紧密且消极的联系。这是因为欧洲各个“中介”的良性“谈判”使得欧洲国家间二战记忆的差别在过去70年的演变中不断缩小,而东亚各个“中介”“谈判”的不顺畅则使得东亚各国在二战记忆方面的鸿沟不断扩大。     

Constrained pairwise and center-star sequences alignment problems

This paper considers the minimax regret vertex 2-sink location problem in a dynamic path network with positive edge lengths and uniform edge capacity. Let \(P\) be an undirected path graph of \(n\) vertices, and the weight (initial supply) of every vertex is known as an interval. The problem is to find two vertices \(x\) and \(y\) as two sinks on the path such that all the weights can evacuate to \(x\) and \(y\) with minimum regret of evacuation time in case of an emergency for any possible weight distribution. We present an \(O(n^3\log n)\) time algorithm.     

Exploring the effects of workplace support on work-life experience: a study of Malaysia

To date most studies of workplace support and work-life experience have been of contexts where government policies and legislation to protect employee work-life balance interests are well established, such as US, UK, and other European countries. Little scrutiny has been given to these issues in less developed economies, where support and protection in terms of work-life policies and legislation at the national level is rather limited. Malaysia, the setting of this study, provides such a context. Two types of organizational support, work flexibility and superior support, are studied for their impact on work-life experience of Malaysians. The findings of this study are based on a national survey of working adults in Malaysia. Work-life experience is conceptualized to capture conflict and enrichment aspects, as well as bidirectional effects between work and nonwork. Results show that work flexibility and superior support lower work-life conflict marginally but facilitate greater work-life enrichment among Malaysians. The paper also draws out implications of these findings for human resource development professionals operating in workplace settings within national contexts with limited mandatory work-life provisions.     

Modeling Electricity Price Using A Threshold Conditional Autoregressive Geometric Process Jump Model

Electricity market prices are highly volatile and often have high spikes. Both government authorities and market participants require sophisticated models and techniques for forecasting future prices and managing relevant financial risks in such a volatile market. This article extends the conditional autoregressive geometric process (CARGP) model (Chan et al., 2012 Chan, J. S.K., Lam, C. P.Y., Yu, P. L.H., Choy, S. T.B., Chen, C. W.S. (2012). A Bayesian conditional autoregressive geometric process model for range data. Computat. Statist. Data Anal. 56:30063019.[Crossref], [Web of Science ®] , [Google Scholar]) to the CARGP model with thresholds and jumps, which is abbreviated as CARGP-TJ model in this article. We will demonstrate that the proposed CARGP-TJ model not only captures the unique features of the electricity price but also performs better than other existing models. For robustness consideration, a heavy-tailed error distribution is adopted. Model implementation relies on the powerful Bayesian Markov chain Monte Carlo simulation techniques via WinBUGS software. The analysis of the daily maximum electricity prices of the New South Wales, Australia reveals that the proposed CARGP-TJ model captures the price spikes well for both in-sample estimation and out-of-sample forecast.     

Recurrence relations for moments of record values from generalized extreme value distribution

In this paper some recurrence relations between the moments of record values from the generalized extreme value distribution are established. It is shown that using these recurrence relations, all the single and product moments of all record values can be obtained in a simple recursive manner.     

On the distribution of some ordered variables

Abstract

Motivated by a recent article published by Adam and Tawn, we characterize the distribution of two random variables X, Y ordered linearly like X < Y. We suppose that the random variables follow a bivariate extreme value distribution.