我国全要素能源效率的测度与分析

考虑到能源与资本、劳动力等投入要素间普遍存在的替代效应,本文通过全要素能源效率指标考察我国能源利用水平的时空变化特征,并利用计量模型分析全要素生产率各分解部分对能源效率的影响作用。研究表明:我国总体及区域内的全要素能源效率自2001年起出现了退化现象,区域间能源效率的差异性较为显著,且有扩大趋势;全要素能源效率与全要素生产率之间关系密切,技术进步、纯技术效率和规模效率对能源效率的改善均具有促进作用,软技术的贡献甚至已超越了传统科技进步的功效。     

How leader role identity influences the process of leader emergence: A social network analysis

Contemporary theories on leadership development emphasize the importance of having a leader identity in building leadership skills and functioning effectively as leaders. We build on this approach by unpacking the role leader identity plays in the leader emergence process. Taking the perspective that leadership is a dynamic social process between group members, we propose a social network-based process model whereby leader role identity predicts network centrality (i.e., betweenness and indegree), which then contributes to leader emergence. We test our model using a sample of 88 cadets participating in a leadership development training course. In support of our model, cadets who possess a stronger leader role identity at the beginning of the course were more likely to emerge as leaders. However this relationship was only mediated by one form of network centrality, indegree centrality, reflecting one's ability to build relationships within one's group. Implications for research and practice are discussed.     

Ranked Items Auctions and Online Advertisement

We study auctions for a set of commonly‐ranked items where each buyer has unit demand. This setting has promising applications in areas such as keyword auctions in the search engine advertising industry, the sale of quality‐ranked raw materials, etc. An auction mechanism suitable for this setting is the simultaneous pooled auction (SPA), where each bidder simultaneously submits a single bid and is allocated an object based on the rank of his bid among all the bids. We study how to improve the seller's expected revenue by enforcing a reserve price in an SPA. We find that the use of an appropriate reserve price may significantly increase the seller's revenue, especially when the number of items for sale is relatively large compared to the number of participating bidders. One inherent problem in the SPA is that some bidders may incur ex post losses; that is, they pay more than what they value the received objects. We propose a tailored VCG mechanism that generates the same expected revenue as the SPA does, while bidders do not incur any ex post loss. We also discuss the potential applications of this research to keyword auctions.     

Customer Behavior Modeling in Revenue Management and Auctions: A Review and New Research Opportunities

Customer behavior modeling has been gaining increasing attention in the operations management community. In this paper we review current models of customer behavior in the revenue management and auction literatures and suggest several future research directions.     

阜新市产业结构效应评价

围绕阜新市产业结构调整的合理性问题,在分析阜新市产业结构构成的基础上,对传统的结构评价模型进行改进,采用改进的计量经济模型,计算阜新市产业结构的变化对GDP的贡献率,分析贡献率变化的原因,为阜新市产业结构调整提供建议。     

略论钱锺书的以诗解《诗》

钱锺书《管锥编》读《毛诗正义》,是别具一格的以诗解《诗》的典范之作。本文主要探讨了钱锺书先生尊旧解而出新意的研究手段、设身诗境探幽发微和多诗合观及平行研究的方法。     

噪声背景下提取调制信息的改进奇异值分解技术

在介绍现有奇异值分离技术基本原理及其在故障诊断中的应用的基础上，研究了利用信号时间序列重构的吸引子轨迹矩阵奇异值分布特征与信号特征的关系，引入自相关函数定量计算重构矩阵的延时步长，改进了现有算法，使得吸引子轨迹矩阵的重构更加合理。研究表明该方法能在强噪声背景下提取出所需的调制信号，并成功用于齿轮箱调制故障信号的提取。     

《聊斋志异》生态展现之阐释

《聊斋志异》对于物际生态有着理想化的展现,但现实中我们应拒绝生态完美主义的诱惑。小说中人与自然物奇异的对话无不告诉我们,人与自然的对话理应被界定在良性的范围之内。幻化的笔法,使小说中的自然物得以获得其生态主体性,这对于当今生态文化之建构,无疑具有重大的启迪意义。     

西南少数民族地区新农村建设的特殊性

新农村建设是“十一五”期间我国“三农”问题的总方针,是农村发展的远景目标和宏伟蓝图。新农村建设的难点在少数民族地区。本文以西南少数民族聚居区为例,系统分析与总结了这一地区在建设社会主义新农村中所面临的六大限制,明确提出了新农村建设的发展思路和六大建设重点,指出在新农村建设过程中需要处理好的四大关系。     

大别山区甜柿经济产业发展的思考

本文探讨了甜柿作为一种产业在大别山区发展所存在的问题以及解决方法。