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基于云计算的安全服务研究 被引量:9
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作者 盖玲 《电信科学》 北大核心 2011年第6期97-100,共4页
互联网应用的迅猛发展丰富和方便了人们的生产生活,亦为入侵者提供了大量的机会。不断变化和演进的攻击手段,使得传统的企业安全防护体系面临着前所未有的严峻挑战。随着云计算在各个领域的成功落地,基于云计算的安全服务已经从概念阶... 互联网应用的迅猛发展丰富和方便了人们的生产生活,亦为入侵者提供了大量的机会。不断变化和演进的攻击手段,使得传统的企业安全防护体系面临着前所未有的严峻挑战。随着云计算在各个领域的成功落地,基于云计算的安全服务已经从概念阶段过渡到了完善和推广阶段。云安全服务可以很好地解决诸多安全威胁和挑战,并在包括运营商的很多领域得到广泛的应用。 展开更多
关键词 云计算 云安全服务 sla
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Construction Grammar and Its Implications for Second Language Acquisition
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作者 LI Xiao-hua 《Sino-US English Teaching》 2014年第11期851-857,共7页
Construction grammar attempts to reveal the nature, structure, and functions of language. As a theoretical system of language based on cognitive linguistics, construction grammar is a reaction and thus a contrast to t... Construction grammar attempts to reveal the nature, structure, and functions of language. As a theoretical system of language based on cognitive linguistics, construction grammar is a reaction and thus a contrast to the traditional generative grammar. This paper tries to outline the major propositions of construction grammar and construction theory, analyses the significance of constructions and their relations to second language acquisition (SLA) and the routes of construction acquisition in SLA, plus the orientations in research on the relations between construction acquisition and SLA. 展开更多
关键词 CONSTRUCTION construction grammar construction theory second language acquisition sla
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Can Adults Attain a Native-Like Accent in Their Second Language?
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作者 ZHOU Li 《Sino-US English Teaching》 2015年第6期403-409,共7页
Second Language Acquisition (SLA) is influenced by many different factors. This paper attempts to discuss the age factor in SLA, particularly explores the learners' acquisition of accent. The author firstly introdu... Second Language Acquisition (SLA) is influenced by many different factors. This paper attempts to discuss the age factor in SLA, particularly explores the learners' acquisition of accent. The author firstly introduces the topic and reviews the literature on Critical Period Hypothesis (CPH). Then, the optimal age to attain the native-like accent is discussed. Finally, the author describes some other elements that influence the acquisition of accent and draws a natural conclusion that the topic in this paper needs more profound research. 展开更多
关键词 sla age factor CPH optimal age
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