信息化水平对生产率的直接效应和间接效应——劳动力技能结构的中介作用

构建了关于信息化水平、劳动力技能结构以及生产率的理论框架,探讨了信息化水平对生产率的直接和间接影响,以及劳动力技能结构在其中的中介作用,并利用中国省际面板数据对理论框架进行验证。结果表明:信息化水平对生产率同时具有直接影响和间接影响;信息化水平对生产率的直接影响呈现出动态的阶段性特征,两者之间存在U形关系,信息技术对生产率的促进作用只有在信息化水平达到一定程度后才能显现;信息化水平对生产率的间接影响通过劳动力技能结构的中介作用来实现:信息化水平的提升对低技能劳动者有明显的挤出效应,并带来了中、高技能劳动力需求上升,导致劳动力技能结构升级,从而促进劳动生产率以及资本生产率的提高;劳动力技能结构在信息化水平与全要素生产率之间的中介作用不显著。要使信息化更好地发挥作用,必须匹配较高水平的人力资本,劳动者需要进行持续学习与提升,以适应不断变化的社会需求。     

法式长棍面包酵头发酵技术探析

本文就普通法式长棍面包、酵头及酵头法式长棍面包制作技术进行研究,并从外观、切面组织状态及口感等方面对面包成品比较分析,得出酵头面包无论是从外观状态、内部组织及口感等都与普通法式面包有很大的区别,有独特的优势。酵头法制作的法式长棍面包将成为该种面包的发展方向。     

国际油价冲击与中国的经济增长——基于非对称关系视角的分析

本文基于季度数据，引入非对称协整模型，考察国际油价与中国经济增长的动态关系，并鉴于油价波动对不发达经济体可能的冲击，还测度了油价的不确定性并探析其对经济增长的影响，结果表明：（1）从短期来看，国际油价变化是国内经济增长的单向Granger原因，“中国因素”对全球油价变化的影响尚不明显；（2）从长期来看，国际油价和经济增长具有非对称协整关系，油价上涨对经济的影响明显大于油价下跌所产生的效应；（3）国际石油市场存在正反馈交易行为，导致油价波动在油价上涨时表现更加明显。油价不确定性在短期内对经济增长存在负面影响，长期中则不会显著影响经济增长。以上结果意味着必须高度重视石油安全问题，加强油价波动预警与风险管理系统。     

PLC实现位置全闭环控制

介绍由光栅尺、高速计数模块、PLC及伺服电机组成的位置闭环控制系统，以SKJ6000数控双头锯应用为例，描述系统的组成及相关软件。     

Securitization and Banks’ Equity Risk

This research explores the effects of securitization on the market’s perception of banks’ risk exposure between 2002 and 2007. Our results show that, contrary to some prior evidence in the literature, securitizing banks actually had lower systematic betas until 2007. We find no evidence of increasing idiosyncratic risk with securitization. We identify significant structural break in 2007, when securitizing banks experienced jumps in both systematic and idiosyncratic risks. Finally, we confirm the general belief that larger banks tend to have higher systematic risk and lower idiosyncratic risk because of diversification.     

GAMBLING IN CONTESTS WITH REGRET

This paper discusses the gambling contest introduced in Seel and Strack (2013, Gambling in Contests, Journal of Economic Theory, 148(5), 2033–2048) and considers the impact of adding a penalty associated with failure to follow a winning strategy. The Seel and Strack model consists of n‐agents each of whom privately observes a transient diffusion process and chooses when to stop it. The player with the highest stopped value wins the contest, and each player's objective is to maximize her probability of winning the contest. We give a new derivation of the results of Seel and Strack based on a Lagrangian approach. Moreover, we consider an extension of the problem to a behavioral finance context in the sense of regret theory. In particular, an agent is penalized when her chosen strategy does not win the contest, but there existed an alternative strategy that would have resulted in victory.     

General convex order on risk aggregation

Using a general notion of convex order, we derive general lower bounds for risk measures of aggregated positions under dependence uncertainty, and this in arbitrary dimensions and for heterogeneous models. We also prove sharpness of the bounds obtained when each marginal distribution has a decreasing density. The main result answers a long-standing open question and yields an insight in optimal dependence structures. A numerical algorithm provides bounds for quantities of interest in risk management. Furthermore, our numerical results suggest that the bounds obtained in this paper are generally sharp for a broader class of models.     

影片《功夫熊猫》中美国文化的模因分析

模因论是解释文化进化规律的一种新理论。运用模因论对美国动画电影《功夫熊猫》进行研究，可探讨其中独特的美国文化模因，即个人主义的复制及传播。     

语文教学中美育的实施

美育是素质教育的重要组成部分。本文就作者几年来在文学作品教学中的一点作法来谈一谈语文教学中美育的实施,即文学作品的美育因素,可以从意境美、语言美、人物形象美、结构美、环境美等五个方面来进行充分挖掘。