摘要：In this paper, the problems of chaos and chaos control for a class of susceptible-infected- removed （SIR） epidemic model with seasonal fluctuation are investigated. The season- ality in outbreak is natural among infectious diseases, as the common influenza, A type H1N1 influenza and so on. It is shown that there exist chaotic phenomena in the epidemic model. Furthermore, the tracking control method is used to control chaotic motions in the epidemic model. A feedback controller is designed to achieve tracking of an ideal out- put. Thus, the density of infected individuals can converge to zero, in other words, thedisease can be disappeared. Finally, numerical simulations illustrate that the controller is effective.

摘要：Considering the design problem of non-fragile decentralized H∞ controller with gain variations, the dynamic feedback controller by measurement feedback for uncertain linear systems is constructed and studied. The parameter uncertainties are considered to be unknown but norm bounded. The design procedures are investigated in terms of positive definite solutions to modify algebraic Riccati inequalities. Using information exchange among local controllers, the designed non-fragile decentralized H∞ controllers guarantee that the uncertain closed-loop linear systems are stable and with H∞ -norm bound on disturbance attenuation. A sufficient condition that there are such non-fragile H∞ controllers is obtained by algebraic Riccati inequalities. The approaches to solve modified algebraic Riccati inequalities are carried out preliminarily. Finally, a numerical example to show the validity of the proposed approach is given.

摘要：住院医师规范化培训(简称住培)是培养合格住院医师,提高医疗队伍诊疗水平的重要举措。设定科学的教学课程体系,提高住院医师的岗位胜任力是住培的核心和关键。广东省人民医院临床病理科专业基地基于成果导向的教育理念,设计多层次和组合式课程体系,采用分层递进式培养方案,探索建立以岗位胜任力为导向、以提高住院医师综合实践能力为中心的住培教学体系。从理论知识、操作技能、诊断思维、教学演讲能力、科研素质和人文素养等多方面全方位多维度地培养病理科住院医师的岗位胜任力。经实践证明,该课程体系培训成效显著,培养出的住院医师综合实力强、素质过硬,可以为临床病理科住培工作提供借鉴。

摘要：In this paper, switched controllers are designed for a class of nonlinear discrete singular systems and a class of discrete singular bilinear systems. An invariant principle is presented for such switched nonlinear singular systems. The invariant principle and the switched controllers are used to globally stabilize a class of singular bilinear systems that are not open-loop stable.

摘要：针对一类T-S模糊系统,研究了具有反馈增益扰动的H∞状态反馈控制器的设计问题。当设计的控制器受到外部扰动时,闭环系统仍稳定并满足H∞性能。该文利用Lyapunov稳定性理论,采用线性矩阵不等式(LM I)技术,给出了一种保守性更小的T-S模糊系统非脆弱状态反馈H∞控制器存在的充分条件,并给出了保证系统H∞性能的非脆弱状态反馈控制器的设计方法。已有结果仅仅考虑2个子系统之间的相互作用,该文所给的方法充分考虑了各个模糊子系统之间的相互作用,以降低保守性。数值算例验证了该方法的有效性及优越性。

摘要：针对有界控制导弹采用鸭舵或尾舵单一控制形式存在的劣势,基于双边优化微分对策理论,推导了一种有界双重控制导弹微分对策制导律。该制导律不仅将鸭舵与尾舵两组舵面的控制有效融合在一起,而且实现了有界控制命令最优的分配设计。分析了该微分对策制导律的对策空间,并从弹目机动性能比和控制系统时间常数比之间的关系,给出了鞍点解的存在条件。考虑非完全信息情形,完成了目标加速度滤波器和拦截性能衡量指标的设计。采用Monte Carlo法进行了制导性能的仿真验证,结果表明:所设计的有界双重控制导弹制导律与采用单一的鸭舵控制或尾舵控制的导弹相比不仅机动性要求较低,且具有较高的命中概率。

摘要：通过讨论离散广义系统中的无振控制以及带有外加扰动的鲁棒控制问题，提出了在Ｅｘ（ｋ）或ｘ（ｋ）不能直接得到时，设计观测器，并采用与众不同的输入ｕ（ｋ）＝ＫＥｘ（ｋ），同时研究了在此输入情况下系统的正则性，分离性，无振控制·

摘要：目的根据CDC42蛋白二级结构,设计CDC42 si RNA干扰片段,构建CDC42稳定干扰sh RNA载体。观察CDC42有效沉默对结直肠癌SW480细胞形态的影响。方法根据CDC42基因CDS区序列,设计4条si RNA片段。Western blot筛选最有效沉默片段,酶切插入真核表达载体,将构建的sh RNA质粒载体,瞬时转染结直肠癌SW480细胞,QPCR及Western blot验证CDC42沉默效率;观察转染前后,SW480细胞形态变化。结果 4条si RNA转染细胞后,验证结果显示si RNA-3沉默效率大于50%,沉默效果最好,将此片段插入真核表达载体,测序结果提示CDC42 sh RNA构建成功,转染SW480细胞后,CDC42基因m RNA及蛋白水平表达明显下降,差异有统计学意义;显微镜观察CDC42沉默后,SW480细胞周边伪足伸出减少,细胞变光滑,细胞整体体积明显减小。结论成功根据基因序列设计有效沉默片段,构建CDC42稳定沉默载体,证实CDC42沉默可以逆向改变结直肠癌细胞高侵袭性形态,为研究CDC42对结直肠癌的发生、发展提供分子工具。

摘要：介绍了一种不增加A/D转换单元电路板面积却能加倍扩展模拟输入通道数量的创新设计方法-IC(集成电路)层叠并联。相关技术获中国国家专利。本文给出了以MCS-51和ADC0804接口为典型的硬件、软件设计实例。

摘要：主要介绍了基于HMI与PLC液位监控实验系统的设计过程。详述了该实验系统的功能特点、硬件组成、HMI画面组态过程及PLC编程说明。通过实验教学的实践证明,该系统具有稳定性好、重组性好、便于升级扩充等优点,非常适合学生自主动手实验,并可以此为基础进行更深入的探索和研究。