摘要：研究了一类具有不对称执行器死区故障的非线性系统的跟踪控制问题。基于扩张观测器,提出了一种新的自适应跟踪控制方法。取消了系统所有状态完全可测的限制。在死区模型所有参数以及系统非线性不确定项上界均未知的情况下,所设计的自适应控制器可以很好地消除执行器死区故障的影响,保证跟踪误差有界。仿真结果表明该方法的有效性。

摘要：研究了多智能体有向固定网络的一致性和H∞滤波器设计问题.为了便于滤波器设计,首先对系统模型进行了变换,进而构造了一致性H∞滤波器的形式,得到了保证多智能体渐近一致并满足H∞干扰衰减性能指标的充分条件.通过求解一组线性矩阵不等式可以求得滤波器参数.仿真实例证明了所提出方法的有效性.

摘要：研究了伺服系统的H∞滤波器设计问题。首先对无刷直流电动机控制系统进行了保性能控制器设计,在外界干扰不可避免的情况下,设计了H∞滤波器。使得滤波误差系统渐近稳定且满足一定的H∞性能指标,给出了滤波器存在的充分条件,并通过矩阵变换得到了设计滤波器的LMI方法。通过求解LMI,可以得到滤波器参数。范数小于指定上界的充分条件,并解出了滤波器的参数。最后仿真实例证明了该方法的有效性。

摘要：首先讨论了数理统计和随机过程课程的特点;然后对数理统计和随机过程在科研中的应用进行全面综述,并采用正交试验法分析了水力旋流器中各个性能指标对分离效率的影响;最后通过数据分析得到了分离效率对各个指标因素的敏感程度。结果表明:有效地运用数理统计和随机过程的方法可提高数据分析效率,能为科研提供指导并产生促进作用。

摘要：Abstract： Vanadium compounds are promising therapeutic agents for the treatment of diabetes and cancer. However, vanadium toxicity has been a great concern. Many works suggested that vanadium-induced oxidative stress is a major reason of vanadium toxicity. Quercetin and green tea polyphenols （GTP） are well-known antioxidants that play important roles in the prevention of many oxidative stress-related diseases. In this study, we investigated the protective effects of quercetin and GTP against damages caused by VO（acac）2 on isolated mitochondria and whole cells. The experimental results demonstrated that quercetin and GTP could significantly inhibit mitochondrial dysfimctions induced by VO（acac）2, such as mitochondrial swelling, depolarization of the inner mitochondrial membrane potential （△ψm）, and increased release of reactive oxygen species （ROS）. Moreover, they also reduce cytotoxicity in Hep G2 cells. These results indicated that use of natural antioxidants to control the metal toxicity of vanadium compounds may be a promising strategy for developing metal-based therapeutic agents.