MIXED H_2/l_1 OPTIMIZATION PROBLEMS FOR SISO DISCRETE TIME CONTROL SYSTEMS

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｄｅｓｉｇｎｏｆｃｏｎｔｒｏｌｌｅｒｓｓａｔｉｓｆｙｉｎｇｍｉｘｅｄｐｅｒｆｏｒｍａｎｃｅｃｒｉｔｅｒｉａ ,ｓｕｃｈａｓｍｉｘｅｄＨ2 /Ｈ∞ｐｒｏｂｌｅｍ(Ｋａｍｉｎｅｒｅｔａｌ.,1 993 ) ,ｍｉｘｅｄｌ1 /Ｈ∞ｐｒｏｂｌｅｍ(Ｓｚｎａｉｅｒｅｔａｌ.,1 996) ,ｍｉｘｅｄｌ1 /Ｈ2ｐｒｏｂｌｅｍ(Ｓａｌａｐａｋａｅｔａｌ.,1 995) ,ｈａｖｅｒｅｃｅｎｔｌｙｂｅｅｎｔｈｅｆｏｃｕｓｏｆｒｅｓｅａｒｃｈｅｒｓ.Ｖｏｕｌｇａｒｉｓ(1 995)ｉｎｔｒｏｄｕｃｅｄｍｉｘｅｄＨ2 /ｌ1 ｏｐｔｉｍ…     

THE RELATIONSHIP BETWEEN ULCER RECURRENCE AND HELICOBACTER PYLORI: A PROSPECTIVE ONE-YEAR FOLLOW-UP STUDY IN CHINA

ＩＮＴＲＯＤＵＣＴＩＯＮＨｅｌｉｃｏｂａｃｔｅｒｐｙｌｏｒｉａｓｏｎｅｏｆｔｈｅｍａｊｏｒｐａｔｈｏｇｅｎｔｉｃｆａｃｔｏｒｓｉｎｐｅｐｔｉｃｕｌｃｅｒｈａｄｂｅｅｎｉｄｅｎｔｉｆｉｅｄ(ＮＩＨ,1994).Ｍｏｒｅｔｈａｎ90%ｏｆｐａｔｉｅｎｔｓｗｉｔｈｄｕｏｄｅｎａｌｕｌｃｅｒａｎｄ85%ｏｆｐａｔｉｅｎｔｓｗｉｔｈｇａｓｔｒｉｃｕｌｃｅｒｈａｄａｔｔｈｅｓａｍｅｔｉｍｅＨ.ｐｙｌｏｒｉｉｎｆｅｃｔｉｏｎｉｎｇａｓｔｒｉｃａｎｔｒｕｍｗｈｉｃｈｌｅａｄｓｔｏｃｈｒｏｎｉｃａｃｔｉｖｅｇａｓｔｒｉｔｉｓ(Ｔ…     

The histone H3K27 demethylase REF6/JMJ12 promotes thermomorphogenesis in ArabidopsisOA

Dynamic trimethylation of histone H3 at Lys27(H3 K27 me3) affects gene expression and controls plant development and environmental responses.In Arabidopsis thaliana,RELATIVE OF EARLY FLOWERING 6(REF6)/JUMONJI DOMAIN-CONTAINING PROTEIN 12 demethylates H3 K27 me3 by recognizing a specific DNA motif.However,little is known about how REF6 activates target gene expression after recognition,especially in environmental responses.In response to warm ambient temperature, plants undergo thermomorphogenesi...     

《中国图书馆分类法》（第5版）“H31英语”类目的修订

《中国图书馆分类法》（以下简称《中图法》）（第5版）“H语言、文字”大类的修订主要集中在“H31英语”类目,包括对类目的扩充、对类名的修改及对注释的增加、删除和合并。通过对“H31英语”类目的分析发现,该类目存在注释中“专业英语”的归类和“H310．421大学英语水平考试”类目的归属欠妥当、“H319．6习题、试题”类目的类名不规范等问题。《中图法》（第5版）再版修订时应针对上述问题进一步完善“H31英语”类目。     

试论劳伦斯小说的性描写意图

劳伦斯的小说因性描写而倍受争议。其实,劳伦斯是通过性反映资本主义工业文明对人性的扭曲,企图通过性追求回归自然的人类天性,同时表达了自己以“血性意识”为基础的性理想。劳伦斯小说的性描写和他的性理想也存在着偏颇之处。     

回归后香港中学体育课程建设的新特点

通过对香港回归前的课程指引和内地执行的体育教学大纲的比较研究 ,香港回归祖国后新编拟的中学体育科课纲要在教学目的、内容和计划性方面都表现了新特点。这为地区间学校体育相互交流、协调发展提供了共识和新的起点 ,也有利于中华体育的共同发展。     

Grice会话含意理论与外语教学

Grice会话含意理论对外语教学具有实践指导意义，语言教师应引导学生运用已有信息，根据“合作原则”中的各项准则并结合语境对新信息进行语用推理，解读语篇中有意超越字面意义的隐含意义，强调含意论和语境论在外语教学中的作用。     

Information world mapping: A participatory arts-based elicitation method for information behavior interviews

Participatory, arts-based methods generate rich data with which researchers can explore information behavior in context, and may be particularly apt when engaging with youth or participants with low literacy levels. Information world mapping (IWM) is an innovative and interactive drawing-based interview technique for data elicitation. Initially developed for use in a study of young parents’ health information practices, IWM guides participants in depicting their personal social information worlds, including items, places, and relationships. Maps are then used to facilitate critical incident elicitation of participants' stories about, and interpretations of, their information practices. Within the young parent study, three styles of map were commonly seen: the directional map, the mind map, and the symbolic map. Use of IWM requires time and ethical care, but the method enables researchers to center participants’ own perspectives on information practices, triangulate data obtained via more traditional methods, and enrich understanding of social information worlds.