综合控制系统的动态输出反馈控制器设计

为进一步对控制系统进行系统分析与设计,对离散时滞奇异摄动不确定控制系统设计动态输出反馈控制器,使闭环系统渐近稳定.针对时滞依赖和时滞独立两种情形进行讨论,构造一种新的二次求和型李雅普诺夫泛函.利用交叉项界定方法对泛函差分过程进行放大,并综合运用引理消除系统的不确定性,推出动态输出反馈控制器在时滞条件下存在的充分性判据,扩大控制器的摄动控制范围.对所得结论进行推广,通过算例验证该方法的有效性和可行性,并通过对比相应文献,说明所得控制器具有一定的优越性,可使闭环系统渐近稳定.不仅符合设计要求,而且能达到二次调节控制效果.     

考虑标度的加型一致性模糊判断矩阵的排序方法

通过实例说明相关文献中加型一致性模糊判断矩阵排序方法的参数取值存在的问题,分析出该问题是由于其公式证明中没有区分标度导致的,指出其结论适用于0～1标度的加型一致性模糊判断矩阵.然后,重新证明了0.1～0.9标度下的加型一致性模糊判决矩阵的排序方法和相关结论.最后,定义了广义模糊标度,并给出广义模糊标度下加型一致性模糊判断矩阵的排序方法和相关结论,使得相关文献中排序方法和相关结论实现形式上的统一.     

A new genus and two new species of Pudeoniscidae Lemos de Castro 1973 (Crustacea: Isopoda: Oniscidea) from Brazil

To date, the family Pudeoniscidae includes six species and three genera, Pudeoniscus, Brasiloniscus and Iansaoniscus, with distributions restricted to Brazil. Here, we redefine the family Pudeoniscidae based on the discovery of a new genus and two new species, Oxossioniscus pataxo sp. nov. and Oxossioniscus akoko sp. nov., from the Brazilian Atlantic forest in the state of Bahia, and on the examination of Pudeoniscus birabeni and Pudeoniscus obscurus. Moreover, P. obscurus is re-described and new records are provided for P. birabeni.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:A0123730-C623-49CE-8665-AE17FDDF994A.     

Theoretical construction in physics – The role of Leibniz for Weyl's ‘Philosophie der Mathematik und Naturwissenschaft’

This paper aims at closing a gap in recent Weyl research by investigating the role played by Leibniz for the development and consolidation of Weyl's notion of theoretical (symbolic) construction. For Weyl, just as for Leibniz, mathematics was not simply an accompanying tool when doing physics—for him it meant the ability to engage in well-guided speculations about a general framework of reality and experience. The paper first introduces some of the background of Weyl's notion of theoretical construction and then discusses particular Leibnizian inheritances in Weyl's ‘Philosophie der Mathematik und Naturwissenschaft’, such as the general appreciation of the principles of sufficient reason and of continuity. Afterwards the paper focuses on three themes: first, Leibniz's primary quality phenomenalism, which according to Weyl marked the decisive step in realizing that physical qualities are never apprehended directly; second, the conceptual relation between continuity and freedom; and third, Leibniz's notion of ‘expression’, which allows for a certain type of (surrogative) reasoning by structural analogy and which gave rise to Weyl's optimism regarding the scope of theoretical construction.     

Dashnic-Zusmanovich+矩阵线性互补问题解的误差界估计

利用Dashnic-Zusmanovich₊矩阵的定义,通过不等式放缩技巧和Dashnic-Zusmanovich矩阵逆的无穷范数估计式得到Dashnic-Zusmanovich₊矩阵线性互补问题解的误差界.