Stability analysis for switched genetic regulatory networks: An average dwell time approach

In this correspondence, the problem of exponential stability for switched genetic regulatory networks (GRNs) with time delays is investigated. The GRNs are composed of N modes and the network switches from one mode to another. By employing the piecewise Lyapunov functional method combined with the average dwell time approach and by using a novel Lyapunov–Krasovskii functional (LKF), sufficient criteria are given to ensure the exponential stability for the switched GRNs with constant and time-varying delays, respectively. These criteria are proved to be much less conservative than the most recent results, since the results reported in this paper not only depend on the delay bounds, but also depend on the partitioning. All the conditions presented here are in the form of matrix inequalities which are easy to be verified via the Matlab toolbox. Two examples are provided in the end of this paper to illustrate the effectiveness of the obtained theoretical results.     

把“愉快教学”引进英语课堂

要上好一节英语课,提高英语课堂教学质量,为学生创造一个轻松愉快的学习氛围,教师必须改变陈旧的教学模式,将愉快教学引进英语课堂。     

高职教育质量评价隐性指标研究

教育质量评价指标客观上应由显性指标和隐性指标两部分构成。在高职教育质量评价体系中,隐性指标往往使评价、导向更具现实性和健康性,充分展现办学特色,促进高职教育可持续发展,但在实践中往往成为盲点。构建隐性指标体系,需要学校不仅要设计好、管理好显性课程,而且要精心设计、细心培育良好的校风校纪、学风学纪、和谐的师生关系、丰富的实践教学活动等涉及学生身心成长的非正式教育因素。     

Enzyme dynamic study on calmodulin Ca++-Mg++-ATPase system of red blood cells inhibited by α-anordrin and probimane

To clarify the possible mechanisms of α-anordin and probimane on calmodulin Ca⁺⁺-Mg⁺⁺ ATPase system, enzyme dynamic study was carried out by determining three dynamic parameters [the substrate concentration (ATP)-response curve, dose (inhibitors)-response curve and time-response curve]. Our data have shown that the inhibitory rates of α-anordrin and probimane are unrelated to substrate (APT) concentrations, but related to calmodulin concentrations. The inhibition of α-anordrin and probimane is very quick that is completed within 1 to 5 min and can maintain more than 1 hr in the same inhibitory rates. So it is possible that α-anordrin and probimane are calmodulin competitors with calmodulin-like binding whose actions can occur by affecting the reaction balance of substrate and product on target enzymes of calmodulin (Ca⁺⁺-Mg⁺⁺-ATPase).     

互文性技巧在诗歌与广告翻译中的运用

本文审视了互文性与广告、诗歌翻译的关系。互文性强调文本之间的相互依赖、相互影响。克里斯蒂娃认为,每个文本都是用马赛克般引文拼嵌起来的图案,每个文本都是对其他文本的吸收和转化。本文认为中西诗歌翻译和广告翻译具有大量的互文性特点,作为译者既要充分认识到诗歌与广告中的互文特点,又要采取适当的策略传递互文的契合。     

略论南朝学术文艺的地域差别

南方的长江流域明以中游的荆楚地区兴起最早。但在秦统一全国的战争中，大批楚移民向东迁徙，造成了汉初下游和上游学术艺一度高于中游。经过汉代的发展，中原人民大量南迁，使中游的学术化逐步赶上了上游和下游。然而三国时的战乱使吴地化发展再次超越中游。西晋末年以后，大批中原士人南迁吴越，更使长江下游成了南方甚至全国的化中心。与此同时，由于上游的巴蜀地区出现了巴氐李氏政权，又距都城建康较远，学术化遂显萧条。相反地，中游的荆襄则在进入南朝以后由于在经济和军事上的地位而日趋重要，这里的化也迅速发展，到南朝齐梁时代，此地的学术化已颇繁荣。但梁末江陵的陷落，却使这里不少地方落入北周的控制之下。陈代的疆域较齐梁已大为缩小，由于王谢刘萧诸族的衰落，学术艺也趋向衰颓。但与此同时，在侯景之乱中，一些人避难广东、福建，却也使那里的学术艺得以发展。     

延安精神：新时期高校辅导员队伍思想建设的法宝

新时期加强高校辅导员队伍建设的关键是思想建设。曾经在中国革命历史上发挥过重要作用的延安精神,对新时期加强辅导员队伍思想建设仍然具有十分重要的指导意义。弘扬延安精神是新时期加强辅导员队伍思想建设的必由之路和重要法宝。     

论腐败利益观

腐败利益观是腐败主体对于利益的整体认识 ,是腐败行为产生和蔓延的重要理论基础 ,其核心思想是个人利益与国家和集体利益的“错位”,重要内容是将市场经济种种原则“越位”,并凸现享乐、贪婪、攀比和补偿等若干畸形思想