广州市用水量变化规律分析

结合广州市部分经验调度工况的结果,从宏观角度分析广州市的用水量变化规律及其影响这种变化规律的内在因素和外在因素。分析不同节假日、不同工作时段的用水量变化规律,为优化调度提供参考依据,最终达到节省能源消耗,提高生产效益和经济效益的目的。     

Long-run matching relationship in the Japanese labor market

This paper investigates the long-run relationship among new hiring, unemployment (job seekers), and unfilled vacancies in Japan, using an annual panel data on 47 prefectures for 1972-1999. We find that these three variables are I(1) processes, and are cointegrated in our panel data. Further, we estimate the panel cointegration equation derived from a Cobb-Douglas matching function by the heterogeneous fully modified OLS and heterogeneous dynamic OLS. The estimation results reveal that conventional within estimates could have non-negligible biases.First version received: November 2002/Final version received: October 2003All correspondence to Shigeki Kano. The authors are grateful to the associate editor and two anonymous referees of this journal for helpful comments. Doctor Stephen J. Turnbull (University of Tsukuba) is also acknowledged for correcting English errors in this paper. Remaining errors are due to the authors. The data set and GAUSS programming code used in this paperare available upon request.     

Gender and Network Formation in Rural Nicaragua: A Village case study

Abstract

This contribution examines the relation between gender and network formation in rural Nicaragua in 2007 and studies differences in the structure and contents of men's and women's networks. Such differences are relevant, as network theory suggests that structural characteristics – as well as the contents of networks – strongly influence the type and amount of benefits generated. Through the application of dyadic regression techniques, this study examines the determinants of the size and socioeconomic heterogeneity of individual networks. Research findings suggest gender segregation of networks and considerable differences in the structure and content of men's and women's networks. These differences relate to the gendered division of labor and to women's time poverty in particular. Our results are relevant in a context where policy makers increasingly consider social networks an important policy tool. We caution against a gender-blind alignment on existing social networks and argue for detailed mapping and unpacking of social networks through a gender lens.     

Evaluating flood risk management options in Scotland: A participant-led multi-criteria approach

The characteristics of flood risk management include complexity, large spatial scales, inter-temporal issues, plural values and conflicts of interests. It is argued that issues with such characteristics require public participation in the decision making process. This study builds on existing deliberative processes to develop a new participant-led multi-criteria method to evaluate flood risk management options in Scotland. The results show that participants preferred regeneration or planting of native woodland to other flood management options, and least preferred building flood walls and embankments. The design of the workshops allowed a rich dataset to reveal the thinking behind such results and provided a deeper understanding of why participants came to these conclusions.     

浅谈核心企业的价值链分析

通过对核心企业上下游价值链的分析,使我们以新的视角看待影响企业成本的因素,找到了与以往不同的降低成本的途径。希望通过本文的分析能为企业降低成本提高竞争力提供新的思路。     

第三方物流企业实施VMI战略的SWOT分析

应用SWOT分析法对第三方物流企业采用VMI战略进行分析。基于第三方物流企业自身的优势和劣势，实施VMI战略能起到整合资源、降低成本、提高服务水平和降低风险的作用。针对VMI战略给第三方物流企业带来的挑战。提出了加大信息投入、加强客户联系、提高员工素质、提高管理水平等应对策略。     

输变电工程质量管理探析

输变电工程项目属于资金技术密集型项目,同时,项目施工的工程环境相对较差。如何保证项目的合理实施,是对输变电工程项目管理的重要考验。本文针对相关的质量风险体系和层次方法进行阐述,供同行参考。     

Is the environment‐friendly factor attractive to customers when purchasing electric vehicles? Evidence from South Korea

In a bid to reduce greenhouse gas emissions, several countries worldwide are implementing policies to promote electric vehicles (EVs). However, contrary to expectations, the diffusion speed of EVs has been rather slow in South Korea. This study analyzes consumer preferences for the technological and environmental attributes of EVs and derives policy and environmental implications to promote market diffusion of EVs in South Korea. We conduct a choice‐based conjoint survey of 1,008 consumers in South Korea and estimate the consumer utility function using a mixed logit model considering consumer heterogeneity. Based on the consumer utility function, we analyze consumers' willingness‐to‐pay (WTP) for EV attributes such as driving range, charging method, charging time, autonomous driving function, carbon dioxide (CO₂) reduction rate, and purchase price. The results indicate that the current low acceptance of EVs is due to their relatively high price and lack of a battery charging technology that satisfies consumers' expectations of the charging method and time. One interesting finding is that Korean consumers have a relatively higher WTP for the CO₂ reduction rate of EVs than consumers in other countries; however, they do not consider CO₂ reduction over other technological attributes when choosing EVs. This implies that the rate of CO₂ reduction of EVs is not an important factor for South Korean consumers when buying EVs. We also calculate the effect of CO₂ reduction with the market penetration of EVs and find that CO₂ reduction through the diffusion of EVs depends on the country's electricity generation mix.     

基于主成分分析的应急保障军队车辆器材供应商选择

分析了突发事件中军队车辆器材应急保障的特点,在此基础上建立了军队车辆器材供应商评价的指标体系,并将主成分分析应用于供应商的评价选择。根据应急保障车辆器材供应商的实际指标数据进行了实例计算,并对各供应商进行综合评价,验证了主成分分析在应急保障车辆器材供应商选择上应用的可行性与准确性。     

产业转移园转型升级与要素响应——以广东为例

以＂双转移＂为核心内容的产业转移园建设在我国产业转型升级中起引领作用。而其本身也有一个因应内外部条件变化而转型升级问题,对此需作深入研究。本文构建了一个双向关联的分析框架,以广东为例,重点分析产业转移园建设中劳动力、资本和土地资源的配置响应,以及转入地和转出地产业转型升级的绩效。在此基础上,从园区建设与管理体制机制、园区产业发展等方面揭示了广东产业转移园建设中的要素响应问题。本文认为产业转移园的转型升级,关键在于改善要素供给。因此,一要以园区提质扩容促进要素集聚。重点要突破园区建设瓶颈,促进园区要素高效集聚;积极推进＂扩园建城＂,吸引高端要素集聚;努力提高环境容量,促进要素规模化集聚。二要改善园区管理,消除要素集聚的障碍,克服园区管理体制机制障碍,促进要素集聚;鼓励差异发展,引导要素及产业集聚的专业化。三要发挥园区企业的主体作用,引导要素集聚。推动产业集群转移,提高要素集聚的质量;形成良好的产业生态,带动园区整体提质。