Asymptotic stability in a flexible-joint robot with model uncertainty and multiple time delays in feedback     

Amit Ailon 《Journal of The Franklin Institute》2004,341(6):519-531

This study considers the stability problem of a flexible-joint robot in case time delays are involved in the feedback loop. We assume in our analysis that the controller uses only position measurements. The single and multiple time-delay cases, are considered. By using some useful structural properties of the robot model, sufficient conditions for asymptotic (exponential) stability of the system under consideration have been established. An estimate to the system rate of convergence is given and a procedure for evaluating the region of attraction, is given.  相似文献   

Eiffel与Java继承机制的比较     

戎戟 《科技广场》2007,(7):240-241

Eiffel全面支持类的多重继承。多重继承更能真实地描述现实世界中的抽象层次,但其语法规定和语义实现较为复杂。Java仅支持类的单一继承,但可通过接口实现多重继承的部分功能。接口易于操作,但存在不一致性问题。  相似文献   

人体主要机能与形态指标的数学模型     

胡泳章  杨秀珍 《宁夏师范学院学报》1999,20(6):10-13

用多元线性回归法,建立了肺活量与胸围体重间的回归方程,从而展示了人体部分主要机能与形态指标间的量化关系。  相似文献   

利用核电四极矩检测含氮爆炸物   总被引：2，自引：0，他引：2  

夏小建 《泉州师范学院学报》1999,(2)

介绍了利用核电四极矩检测含氮爆炸物的理论、系统组成及工作原理,并把多单脉冲用于含氮爆炸物的检测,得到了较好的实验结果  相似文献   

知识产权模糊评价模型的构建与应用   总被引：11，自引：0，他引：11  

章廷兵  方新 《科研管理》1999,20(6):52-59

对知识产权进行价值评佰促进科技成果转化的一个重要环节。目前知识产权价值评估的基本方法即收益现值法、成本法及市场法均存在不同程度的局限性,影响了评价结果 和公正性,阻碍了知识产权向生产力的转化。本在基本评价方法的基础上不同对影响知识产权价值的因素进行了分析,建立了知识产权价值的模糊评价模型并针对具体案例作了研究分析。  相似文献   

Burgers hierarchy: Multiple kink solutions and multiple singular kink solutions     

Abdul-Majid Wazwaz 《Journal of The Franklin Institute》2010,347(3):618-10294

The Burgers’ hierarchy is investigated. Hirota's bilinear method is employed for a reliable treatment of this hierarchy. Multiple kink solutions and multiple singular kink solutions are formally derived for Burgers’ hierarchy.  相似文献   

Sustainable transition of electronic products through waste policy   总被引：1，自引：0，他引：1  

Erik Hagelskjær Lauridsen  Ulrik Jørgensen 《Research Policy》2010,39(4):486-494

The European Union's Waste Electrical and Electronic Equipment (WEEE) directive makes a challenging case for transition theory and its different aspects, as it represents an ongoing and still open-ended case. At present the objectives of the directive are not met: the amount of electronic waste is increasing, and the resulting waste is poorly managed. With its starting point in the multi-level perspective of transition theory, this case study analyzes how the outcome of the WEEE directive is constituted in the interplay between the somewhat detached regimes of electronics and waste management. The two regimes are described and analyzed together with the underlying regulatory principle of extended producer responsibility, which has guided the design of the directive. Conflicting interpretations of sustainability, in combination with a simplistic understanding and agency introduced from the top-down, has eliminated waste minimization as the main outcome of the directive. The concluding discussions raise the issues of the role of sustainable niche initiatives in electronics compared to multi-regime interaction. Guiding visions may need to be supplemented with other alignment devices in order to support co-evolution of regimes and coherent actions within transition processes.  相似文献   

高等师范院校体操普修课应用“多元智能理论”教学的实验研究     

董大伟 《哈尔滨体育学院学报》2010,28(5):73-75,79

当前,对于高等师范院校体操普修课教学方法的研究很多,而依据一著名理论进行体操教学方法研究的却很少见。为此,文章结合体操的特点把多元智能理论应用到体操普修课教学的实践当中,并运用文献资料法、专家访谈法、教学实验法等进行了深入的研究。通过教学实验证实：多元智能理论指导下的体操普修课教学与传统教学相比,对学生掌握动作技术技能有显著效果,而在发展学生身体素质方面效果却不显著;与传统教学相比,多元智能理论指导下的教学能更有效地达到教学的主要目标,提高体操教学的质量,能为其它体育专业教学提供有价值的参考。  相似文献   

Conceiving multiple markets through network analysis: evidence from the emergence of the World Music market     

Glaucia Peres da Silva 《Journal of Cultural Economy》2018,11(3):244-260

The idea of multiple markets, conceptualised as a variety of concrete market configurations, was fruitfully developed in the socio-material networks research programme. However, it has not yet been able to solve the following puzzle: the differentiation and specification of multiple markets that exist at the same time in the same place. In this paper, I argue that White’s model of ‘markets from networks’ can contribute to filling this gap, since it is centred on the specification of a market’s structural and cultural boundaries. His model allows for the analysis of concrete market practices intertwined with more abstract concepts of markets formed in discourses that move firms and markets across different levels – from local markets to market sectors. An in-depth analysis of the emergence of the World Music market demonstrates the advantages of employing this model in the analysis of multiple markets.  相似文献   

直放站在TD-SCDMA建网初期中的应用分析     

雷伯录  毛淑华 《科技广场》2006,(11):67-68

在TD-SCDMA网络建设初期,直放站将是实现覆盖的重要补充。本文结合TD-SCDMA移动通信系统的网络特性,介绍了TD-SCDMA直放站的工作原理,分析了在网络建设初期TD-SCDMA直放站应该注意的问题以及目前条件下的在室内外可行的网络应用。  相似文献