General synchronization criteria for nonlinear Markovian systems with random delays     

Xinsong Yang  Chen Xu  Jianwen Feng  Jianquan Lu 《Journal of The Franklin Institute》2018,355(3):1394-1410

It is well known that control of Markovian systems is a difficult problem. This paper considers synchronization control of Markovian coupled nonlinear systems with random delays. A new control scheme is proposed. Sufficient conditions in terms of linear matrix inequalities (LMIs) are obtained such that the coupled system can be asymptotically synchronized onto an isolated system. The synchronization criteria include classical mode-dependent and mode-independent results as special cases. The design method of the control gains is also given. Compared with mode-dependent and mode-independent control methods, our results are more practical and have lower conservatism, respectively. Numerical simulations are given to verify the effectiveness of the theoretical results.  相似文献   

Dynamical behavior of stochastic multigroup S-DI-A epidemic models for the transmission of HIV     

Qun Liu  Daqing Jiang  Tasawar Hayat  Ahmed Alsaedi 《Journal of The Franklin Institute》2018,355(13):5830-5865

In this paper, we study two stochastic multigroup S-DI-A epidemic models for the transmission of HIV. For the stochastic S-DI-A epidemic model with periodic coefficients, we first obtain sufficient conditions for persistence in the mean of the disease. Then in the case of persistence, we show that the model admits a positive T-periodic solution by using Khasminskii theory of periodic solution. Moreover, we establish sufficient conditions for exponential extinction of the infectious disease. For the stochastic S-DI-A epidemic model disturbed by both white and telegraph noises, we first establish sufficient conditions for persistence in the mean of the disease. Then in the case of persistence, we obtain sufficient conditions for the existence of a unique ergodic stationary distribution of the positive solutions by constructing a suitable stochastic Lyapunov function with regime switching and we also obtain sufficient conditions for exponential extinction of the system with regime switching.  相似文献   

经济新常态下我国制造业产品的推广效果研究——基于会展活动的视角     

杨顺勇  任晓师 《科技管理研究》2017,(2)

从会展的新视角聚焦"中国制造2025"等产业发展趋势,以推广制造业重点发展领域的产品为目的,对经济新常态下我国制造业产品的推广效果进行系统性研究。在文献研究和调研分析的基础上选取了影响会展推广制造业产品效果的17个指标,采用Likert量表的问卷形式进行实地调研收集数据,通过客观赋值法中的主成份分析法计算出各指标的权重值并构建评价指标体系,再结合案例分析,对基于会展活动的制造业产品推广效果进行评价,达到定性分析与定量分析相结合评价的目的。结论表明,企业通过会展推广制造业产品能够获得良好的效果,对于开拓市场、创造价值有很好的帮助作用,该结论可以为政府和企业正确利用会展平台推广制造业产品提供一定的参考。  相似文献   

健康成人Q-Td及Q-Tcd测定的正常值     

唐英 《茂名学院学报》1999,(4)

为探讨Q-Td、Q-Tcd正常值,测量油校360例20～59岁健康教工常规体表12导联心电图Q-T间期,并计算出Q-Td、Q-Tcd结果显示:(1)Q-Td均值为23.97±10.10ms,Q-Tcd均值为23.89±8.54ms,Q-Td范围均在10～50ms之间,Q-Tcd在2～45ms之间;(2)男女之间无显著性差异(P>0.05),(3)各年龄组Ⅳ与Ⅰ组(t=2.202P<0.05),Ⅳ与Ⅱ(t=2.403P<0.05)间Q-Td差异有显著性(P<0.05)。认为Q-Td、Q-Tcd均可暂定为<50ms。  相似文献   

专业认证视域下高师院校课程目标达成度评价体系的构建与实践     

蒋成香 《上海教育评估研究》2022,11(1):30-35

课程目标达成度评价是师范类专业认证自评自建中的基础,也是一个重要的环节,但是在认证实践中发现师范专业在实施课程目标达成度评价方面存在较多问题,主要表现为课程目标达成度评价标准缺失、评价主体缺位、评价方式单一和评价改进薄弱四个方面。文章分析了课程目标达成度评价的复杂性,探讨了课程目标达成度评价体系的构建,指出这个评价体系不同于课程评价体系,应该包括科学的组织体系、基本的规范体系和完善的应用体系。文章还探讨了课程目标达成度评价的实践模式,指出需要制定合理的评价标准、要由师生共同参与评价、并要综合应用多种评价方式。  相似文献   

关于L-Fuzzy正规子群的内积   总被引：1，自引：0，他引：1  

杨志辉  刘龙章 《科技通报》2005,21(6):641-643

深入地研究了L-Fuzzy正规子群的内积的若干代数性质,推广了文献[3]中的相应结果。  相似文献