New polytypes of long-period stacking ordered structures in a near-equilibrium Mg97Zn1Y2 alloy

By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg₉₇Zn₁Y₂ (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.     

贫富群体心理融合中的“道德突显现象”

目的:以中国传统的财富观和刻板印象内容模型为理论基础,采用实验法,探讨道德、热情和能力在贫富心理融合中的作用。方法:613名社会人士参加了实验,两个实验分别操作了穷人和富人身份。结果:无论对穷人还是富人的心理融合,道德、热情和能力三个因素对心理融合的主效应都显著,且道德因素的效应值最大。这表明,人们对贫富群体的心理融合存在"道德突显效应",即道德因素在人们对穷人和富人的心理融合过程中起到重要作用。     

预防性抗生素使用的策略与决策

探讨预防性抗生素使用时应考虑的一些问题,包括循症医学、诱导细菌耐药性、药效学和药物经济学等,供临床医生在使用预防性抗生素治疗前进行决策时参考,以期达到最佳的治疗目标。     

Understanding the Influence Theory of Causation: A Critique of Strevens

In this paper, I will first clarify Lewis’s influence theory of causation by relying on his theory of events. And then I will consider Michael Strevens’s charge against the sufficiency of Lewis’s theory. My claim is that it is legitimate but does not pose as serious a problem for Lewis’s theory as Strevens thinks because Lewis can surmount it by limiting the scope of his theory to causation between concrete events. Michael Strevens raises an alleged counterexample to the necessity of Lewis’s theory that, if successful, would have a very important advantage over other alleged counterexamples. But I will assert that it is simply mistaken. My defense of Lewis’s theory will shed interesting light on the relationship between Lewis’s theory and Salmon’s mark theory.     

行为遗传学研究之新进展

自上世纪80年代以来,行为遗传学取得了长足的进展。在定量遗传学方面,共享环境和非共享环境概念的引入深化了人们对环境作用的认识;对于环境和遗传关系,不仅认识到基因型-环境的交互作用可能存在三种形式,还揭示出遗传对环境测量的影响——基因型-环境的相关。分子遗传学作为新兴的研究途径,目前以寻找基因为主,将来则以认识基因如何工作为重。行为遗传学的发展前景将是定量遗传学和分子遗传学以行为基因组学为中心的整合。     

中学生英语学习策略水平及其与英语学业成绩的相关研究

本研究运用《学生学习策略评价表》对安徽省两所中学的239名学生进行调查,考察中学生的英语学习策略水平及其与英语学业成绩的关系.结果发现:(1)中学生英语学习中经常使用的学习策略多集中于认知和调控策略.(2)省示范高中与一般中学学生在英语学习策略存在显著差异.性别上则不存在显著差异.(3)中学生的英语学习策略及其认知和调控策略与学生学业成绩之间呈显著正相关,交际和资源策略与学生的学业成绩则没有显著相关.     

不同沟通方式下群体决策信息利用分析

以180名被试组成45个四人群体．完成模拟人事选拔的问题解决型任务,通过对群体决策过程的信息提取数量和提取次序的分析,考察不同的沟通方式和信息分享程度对群体决策信息利用的影响。结果表明。（1）在不同沟通方式下,决策成员的讨论前偏好对最终决策的影响很大。（2）在不同的沟通方式下,分享程度不同的信息在决策过程中的提取具有差异,体现了不同的规律。     

左右半球在语篇理解中的协同作用

通过2例一侧颞叶损伤患者研究了一侧颞叶损伤及两侧半球的协同作用对语篇理解的影响,并探讨了发生此种影响的可能机制。结果表明一侧颞叶的损伤将导致患者语篇水平的理解障碍及语言推理能力的下降;提示语篇理解需双侧半球的协同作用,而推理能力下降可能是引发语篇理解障碍的原因之一。     

认知过程中的捆绑问题--认知神经科学的研究

捆绑问题是当前脑科学研究中的主要问题之一,近来已成为意识争论的焦点。该文结合国外对捆绑问题研究的最新成果,在概括介绍关于捆绑机制的主要理论的基础上,综述了捆绑问题与主要认知功能关系的研究,并指出不同认知过程中捆绑脑机制的精细化研究和一般性捆绑脑机制的系统化研究可能是今后这方面研究的重点。     

Microblogging, online expression, and political efficacy among young chinese citizens: the moderating role of information and entertainment needs in the use of weibo

In 2011, China's Internet population reached over half a billion users and the popular Twitter-like social networking service, Weibo, has been adopted by half of the users since its launch in August 2009. Given the potential of the Internet to facilitate a civic culture in the authoritarian state, the use of Weibo and its effects on citizens' political attitudes and behaviors are of important concern. A survey of 499 Weibo users found that intensity of use was related to increased willingness to express opinions about government and politics, the perception that one has the ability to participate in politics, and feelings that the government is not responsive to the demands of citizens. Moreover, the above relationships were moderated by the motivations of Weibo use, such that information motives strengthened the relationships while entertainment motives weakened the relationships.