A cognitive perspective on second language acquisition process

Second language acquisition (SLA) has been one of the central topics in cognitive science. Various theories regarding the SLA process have evolved and have been a subject of debate over the years. With a critical review of the competing theories of cognition and language development, this paper examines the differences between L1 and L2 acquisitional processes and then proposes a model of SLA process from a cognitive information-processing perspective. The pedagogic implications of this model are also discussed.     

CONSTRUCTION AND EXPRESSION OF BACTERIORHODOPSIN MUTANT IN HALOBACTERIUM HALOBIUM

ＣＯＮＳＴＲＵＣＴＩＯＮＡＮＤＥＸＰＲＥＳＳＩＯＮＯＦＢＡＣＴＥＲＩＯＲＨＯＤＯＰＳＩＮＭＵＴＡＮＴＩＮＨＡＬＯＢＡＣＴＥＲＩＵＭＨＡＬＯＢＩＵＭＷａｎｇＪｉａｎ（汪俭）；ＭｅｉＱｉ（梅祺）；ＬｕＣｈｕｎｌｉｎ（卢春林）（ＤｅｐａｒｔｍｅｎｔｏｆＢｉ...     

信用证结算方式下出口商的风险与防范

在信用证结算方式下,出口商会面临进口商的道德问题、开证行倒闭、单证不符、信用证软条款、直寄提单等风险。出口商应该通过对相关客户进行资信调查、加强催证审证工作、认真制作单据、要求信用证加具保兑等措施来规避风险。     

大学低年级学生作文中"心理使役动词"应用分析--基于大学生英语写作中的"母语迁移"实证研究

通过对大学一、二年级阶段英语写作中心理使役动词的运用情况进行量化分析，可以发现学生习得心理使役动词的困难和可能发生迁移的区域，这有利于加强对该阶段学生心理使役动词英语表达特点的了解，从而能有针对性地进行大学基础阶段的英语教学，提高学生的实用英语水平。     

理顺提单的性质与法律规定之间的逻辑关系

根据现行国际贸易理论，提单是可以转让的，记名提单是提单的一种，那么，根据三段论的推理过程，我们必然得出结论，记名提单是可以转让的。但现行理论却告诉我们记名提单不可转让。这种违犯逻辑推理的结论源于法律的强行规定。解决这一矛盾的方法有三种：或者改变三段论的大前提，即提单不一定是可转让的；或者改变三段论的小前提，即记名提单不是提单；或者改变法律规定，即记名提单可以转让。这样一来，理论与法律规定之间就取得了和协一致性。而最可行的方法应该是第二种或者第三种。     

一种新的化学镀镍液的配比方案

研究不规则铁制件采用化学法镀镍。用以改善基件的耐腐蚀性，并采用正交实验法对镀镍液的主要组分进行定量选择．找出了最佳配比方案。以及镀镍时的技术条件。     

绿春萝芙木资源薄层色谱鉴别

根据形态学特征对绿春县萝芙木(Rauvolfia L.)资源进行鉴定,同时采用薄层色谱法进行色谱鉴别.结果表明,绿春产萝芙木分别为萝芙木Rauvolfia vericillata(Lour.)Bail.和云南萝芙木Rauvolfia yunnanensisTsiang,两者色谱特征差异明显,但两者均含有药用成份利血平(reserpine)和育亨宾(yohimbine),开发时应综合利用.     

出口信用保险--出口企业信用证收汇的一道安全网

信用证是我国主要的国际贸易结算方式,但在实际操作过程中,出口企业和相关银行却面临种种风险。其中商业、融资、电子商务等环境下的风险可通过出口信用保险来化解。出口信用保险以其特有的作用给出口企业和银行在收汇过程中增加了一道安全网。发展和完善出口信用保险,有利于提高出口企业的国际竞争力,促进我国对外贸易的发展。     

安徽百合科二新种

Two new species of the Liliaceae are described from Anhui Province, China. i. e. Fritillaria qimenensis D. C. Zhang et J. Z. Shao and Lilium anhuiense D. C. Zhang et J. Z.Shao.     

Incubator firm failure or graduation?: The role of university linkages

One of the theoretically important factors for incubator firm performance is the strength of their linkages to the research university sponsoring the technology incubator. Herein, we focus on two types of university linkages to the sponsoring institution: a license obtained from the university and a link to university faculty, while controlling for incubator firm linkages to non-sponsoring research universities, among other factors. We propose that a university link to the sponsoring institution reduces the probability of new venture failure and, at the same time, retards timely graduation. Further, we suggest that these effects are more pronounced the stronger the university link. Due to the difficulty of obtaining fine-grained longitudinal data, the incubation literature is characterized by a dearth of studies focusing on incubator firm differential performance. We attempt to take a first step towards closing this gap by testing these hypotheses through following 79 start-up firms incubated in the Advanced Technology Development Center at the Georgia Institute of Technology over the 6-year period between 1998 and 2003. We find broad support for the hypotheses advanced.