Stabilization of Delayed Networks with Different Nodes     

徐君群  唐万生  张建雄 《天津大学学报(英文版)》2011,17(2):151-156

In this paper,the control of complex delayed networks with different nodes is proposed.Firstly,the stabilization of coupled networks with time delay is investigated.By constructing a Lyapunov function,a linear feedback controller design procedure for the networks is converted to the problem of solving a set of linear matrix inequalities.Then the results are extended to networks with both delayed dynamical nodes and delayed couplings.It is shown that the stabilization of complex networks is determined by the dynamics of each uncoupled node,coupling matrix and feedback gain matrix of networks.Two examples are simulated.In the first example,a network with 10 nodes consisting of Lorenz systems and systems proposed by Zhang in 2009 is given.It is found that the network states are divergent without control,and convergent under designed linear feedback controllers.In the second example,a larger network with 100 nodes consisting of delayed Chen systems and delayed Lorenz systems is given.The proposed method is also effective for large scale networks.  相似文献   

全日制专业学位研究生教育跟踪研究思考   总被引：4，自引：0，他引：4  

马永红  赵世奎  李晔 《教育与现代化》2011,(1):74-77

我国自2009年实行的全日制专业学位硕士研究生教育正面临着严峻挑战。开展全日制专业学位硕士研究生教育的跟踪研究可为其顺利推进提供基础信息支持。本文在深入研究美国经验的基础上,提出了在我国开展全日制专业学位研究生培养过程跟踪研究的基本构想。  相似文献   

“物是人非”的哲学意蕴     

高欢欢 《湖北函授大学学报》2015,(11)

马克思的实践时空观强调人的实践活动在事物发展过程中的作用。当下,在人们的现实生活中常会有故地重游的经历,在故地重游的时候人们往往又会有物是人非的感叹或故地重游感慨多的情感经历。揭开这一微妙情感的面纱,不难发现人的实践活动是推动这一情感变化的主体。只是在这一情感形成的过程中时间,空间同人的活成交织状态发展着。  相似文献   

中国延迟退休的主要影响因素及执行时间预测     

刘雅倩  朱勇  胡学峰  朱家明 《丽水学院学报》2015,(2):22-28

针对中国的延迟退休:先建立国民人均预期寿命、人口老龄化程度、劳动力供求和国民受教育等影响指标计算公式,综合分析并建立延迟退休影响力模型;再针对教师、内科医生、公司职员、客车司机、重体力劳动者5类群体,运用层次分析法得出各类群体具体退休年龄,并结合美国、日本、英国、澳大利亚、意大利等国家的相关指标数据,使用模糊聚类方法联系中国国情得出中国退休政策执行时间预测表;最后,定量分析了我国"延迟退休"政策实施对养老保险可能带来的影响。  相似文献   

Finale furioso: referee-biased injury times and their effects on home advantage in football     

Dennis Riedl  Bernd Strauss  Andreas Heuer  Oliver Rubner 《Journal of sports sciences》2015,33(4):327-336

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Influence of sex and specialty on the prediction of middle-distance running performances using the Mercier et al.’s nomogram     

Jeremy B. Coquart  Daniel Mercier  Montassar Tabben  Laurent Bosquet 《Journal of sports sciences》2015,33(11):1124-1131

The aim was to test the influence of sex and specialty (3000, 5000 and 10000 m) on the validity of middle-distance running performance predictions obtained from the Mercier et al.’s nomogram. Consequently, we examined all official French track running rankings for the 3000-, 5000- and 10000-m events (men and women) from 2006 to 2012. A scoring table was used to determine the runners’ specialties. Only runners who performed in the three distance events within the same year were included (75 women and 400 men). The Mercier et al.’s nomogram was used to predict one running performance from the other two. The results showed no significant difference between actual and predicted running performances (P = 0.77). Female runners had significantly lower performances than male runners (P < 0.001). Specialty did not influence performances (P = 0.11). Very high correlations were found between actual and predicted performances (0.91 < r < 0.99), with the exception of women (r = 0.85) in 5000 m. Moreover, low limits of agreement were obtained for male and female runners, whatever the specialty. These results support the validity of the nomogram to predict running performance in the 3000-, 5000- and 10000-m events for male and female runners, whatever the specialty. The predicted running performances may be used in training programmes (e.g., to prescribe tempo runs) and competitions (e.g., to establish split times).  相似文献   

初中生学业延迟满足与成就目标定向的关系研究     

陈迪  董颖红 《喀什师范学院学报》2015,(3)

学业延迟满足是指学生在学习情境中甘愿为更有价值的长远结果而放弃即时满足的抉择倾向,以及在等待过程中展示出的自我控制和调节能力。通过调查分析,本研究探讨了初中生学业延迟满足与成就目标定向的关系。主要研究结果如下：不同学业延迟满足能力水平的初中生的成就目标存在显著差异;掌握接近目标和掌握回避目标对学业延迟满足有促进作用,而成绩回避目标对学业延迟满足有负向影响,其中掌握接近目标对学业延迟满足的正向预测作用最大。  相似文献   

油酸三乙醇胺皂化物的合成     

甘黎明 《兰州石化职业技术学院学报》2015,(2):9-11

采用单因素控制变量法,以扣除酸值后的皂化值为评价指标,研究了反应配比、反应温度、反应时间对合成油酸三乙醇胺皂化物的影响。结果表明,油酸和三乙醇胺配比为1.2∶1(mol/mol)、温度为130℃、反应时间为3h时,反应达到平衡时体系中油酸三乙醇胺皂化物的含量最多。利用合成的油酸三乙醇胺皂化物调配成的水基润滑油符合相关要求。  相似文献   

论经验性的作者*--从神学诗学角度下的探讨     

陈于思 《楚雄师范学院学报》2015,(5)

神学诗学对文学的考察一直颇受学界的关注。从神学诗学中的时间概念入手,首先通过“经验性”这一特质来说明作者存在的局限性,然后引入“记忆”的概念着重探讨作者的经验性,最后通过对文学作品《追忆似水年华》中的经验性层面的呈现来更好地论证作者的经验性。对作者之为“经验性的人”的论证,有利于更好地去把握文本的内在意蕴。  相似文献   

近代四川猪鬃出口贸易兴衰的原因探析     

仝瑞中 《黄石理工学院学报(人文社科版)》2015,(3)

自19世纪末开始,四川猪鬃的出口贸易迅速兴起,猪鬃成为四川重要的出口商品、战时的重要战略物资。四川猪鬃出口贸易的兴起受到重庆开埠、川航开辟的推动与世界市场需求的拉动;丰富的资源、优良的品质及保护发展商品贸易的法令为其出口打下了雄厚的基础,提供了便利的条件。四川猪鬃健全的商品组织体系、完整的贸易及运销体系,使其能够远渡重洋,畅销国际市场。尽管川鬃在国际市场上极有声誉,但出口量仍然起伏不定,究其原因,影响其出口的消极因素有苛捐杂税繁重、国际竞争严峻、加工技术和贸易方式落后等。  相似文献