基于O-U过程的配对交易与市场效率研究

套利交易是一种重要的量化交易策略,本文首先提出了基于O-U过程的配对套利策略,实证检验了基于O-U过程的套利策略和基于协整理论的传统套利策略,研究结果表明O-U过程套利策略与传统协整套利策略相比具有成本低、收益高和风险小等优点。另外,本文从价格对信息的灵敏度、价格均衡的内在机制、市场风险和交易成本四个方面,发现O-U过程套利策略更能促使股价快速回归均衡水平,更显著地提高证券市场的运行效率。     

古希腊智者语言学思想述评

本文以古希腊哲学史为背景,从智者运动入手,截取人类哲学史的一个层面,试图阐释智者的语言学思想及其哲学渊源,从而折射出语言研究与哲学研究的密切关系,为语言学研究和发展提供一点历史借鉴.文章重点评述智者在语言本质、语言研究及语言研究方法几方面的基本思想及观点,以揭示其语言学研究的成果与贡献.     

主题公园与房地产业的融合

针对大量商品房闲置的市场供求状况和目前主题公园的困境,借鉴国际上流行的分时度假概念提出消化我国空置商品房和延长主题公园生命周期的一条途径——将主题公园和房地产两个概念嫁接在一起形成旅游房地产。旅游房地产的产生既是房地产业发展的时代要求,也是旅游业的一个新亮点,由于经济的持续高速增长,人们生活水平的提高及消费观念、消费模式的变化,旅游房地产的发展有着一定的可行性。     

伦理型领导与团队任务绩效的关系研究：一个有调节的中介模型

伦理型领导对团队绩效的影响是学术界和企业界共同关注的一个热点问题。以往研究基本上都是运用社会交换理论来解释这种影响,对社会交换所必需的认知和情境因素则重视不足。通过构建一个有调节的中介模型,探究团队过程中基于信任视角的中介机制和基于价值观一致的调节机制,实证数据表明：伦理型领导正向影响团队绩效,员工对领导的信任在其中发挥完全中介作用;同时,道德认同对这一关系起调节作用,团队的道德认同水平越高,伦理型领导（经由员工对领导信任）对团队绩效的间接作用越强。     

Being Mapuche today in Chile: judgement criteria for ethnic identification among the new generation

This study seeks to identify the underlying factors that sustain ethnic identification judgements – in this case regarding the Mapuche ethnic group – elaborated by a sample of Chilean young people who live in the Santiago metropolitan region. To this end a factorial survey method was used, incorporating quasi-experimental vignettes, which demonstrate social and individual determinants of human judgements. The results show that both self-identification as Mapuche and last name – particularly the paternal surname – are the criteria considered most relevant to inform judgements about ethnic identity. It is clear that there is a complex idea about what it means to be Mapuche today among young people in Chile, combining both subjective and objective factors. This conjunction shows the narrowness of the constructivist and essentialist proposals for understanding ethnicity.     

形成性评价机制下的大学英语词汇教学研究

本文旨在探讨形成性评价机制下的大学英语词汇教学模式。     

从文化视角解读诗歌翻译“种子移植”论

苏珊.巴斯奈特将诗歌翻译置于自己一贯坚持的文化翻译观视阈下,提出了诗歌翻译的"种子移植"理论。文章从文化视角出发,对巴斯奈特诗歌翻译"种子移植"论的产生背景、理论源头和理论内涵进行了全面剖析,阐述了她的"种子移植"论对全球文化背景下的诗歌翻译的启示意义,并揭示了其诗歌翻译观的局限性。     

成渝高速公路SDH光纤通信传输系统设计

根据四川成都一重庆（简称成渝）高速公路的实际情况，完成了对成渝高速公路SDH（同步数字系列）光纤通信传输系统的设计。通过对所设计系统进行的初步测试表明，设计方案合理可行，具有较高的实际工程指导意义。     

An association between bone mineral density and anabolic hormones in middle-aged and elderly men with prediabetes

Introduction: Prediabetes (PD) leads to reduced testosterone (T) in males, but the association between the anabolic hormones and bone mineral density (BMD) remains unknown.

Objectives: We investigated an association between the anabolic hormones and BMD in middle-aged and elderly men with PD.

Methods: We investigated 84 prediabetic and 56 control men. Total T (TT), calculated free T (cFT), and dehydroepiandrosterone sulfate (DHEAS) were measured, and BMD was assessed using DXA methods.

Results: Patients with PD had lower TT (p?p?<?.005), and DHEAS (p?<?.02) than control group. BMD values of the lower lumbar spine (p?<?.02) and total body (p?<?.05) in prediabetic men were lower than in control group. Lumbar spine BMD correlated with TT (r?=?0.376), cFT (r?=?0.235), and HbA1c (r?=??0.368); femoral neck BMD correlated with TT (r?=?0.412) and cFT (r?=?0.421). The high lumbar spine and femur neck BMD was associated with high TT, cFT, and low HbA1c, while the high total body BMD with high TT, cFT, and low HbA1c.

Conclusion: The anabolic hormones significantly affect BMD in male with PD, and screening for low BMD is necessary in these patients.     

Lucas公钥密码体制及其安全性

Ｌｕｃａｓ 公钥密码体制是数论中的Ｌｕｃａｓ 序列与公钥密码体制思想的有效结合。在此基础上,讨论了该体制的安全性问题。通过对几种破译该体制的攻击途径的分析,证明了Ｌｕｃａｓ 体制是一种建立在两种密码假设基础之上的公钥密码体制,从而保证了很高的有效性和安全性