方向角及其变化率的单站无源定位的可观测性

阐述了利用方向角及其变化率的二维单站无源定位的模型 ,利用非线性系统的可观测性定理分析得到了在目标匀速运动条件下该模型定位可观测的充要条件 ,讨论了不同相对运动状态下模型的可观测性问题 ,并举例进行了计算机仿真。最后得出对于固定辐射源 ,要求观测器非径向运动 ,对于匀速直线运动辐射源 ,要求观测器非径向机动运动的结论。     

Impulse observability and impulse controllability of regular degenerate evolution systems

Impulse observability and impulse controllability of regular degenerate evolution systems are discussed by using functional analysis and operator theory in Banach space. Necessary and sufficient conditions for the impulse observability and impulse controllability of the system are obtained. This research is theoretically important for studying the design of the degenerate evolution system.     

不确定性离散时滞大系统的分散镇定控制

利用线性矩阵不等式方法研究了一类不确定离散大系统分散控制问题 ,且系统中具有时滞相关项。通过求解线性矩阵不等式 ,提出了系统可分散状态反馈镇定的充分条件 ,并给出了线性无记忆状态反馈分散控制器设计和优化方法。最后给出了数值算例以说明其可行性     

Reachability/controllability of high order mix-valued logical networks

This paper addresses the reachability/controllability of high order mix-valued logical control networks by using the semi-tensor product method, and presents some necessary and sufficient conditions for the reachability/controllability. The high order mix-valued logical network is converted into an algebraic form first, based on which the reachability/controllability of the system is then investigated, and several necessary and sufficient conditions are established. The study of several illustrative examples shows that our new method is very effective in dealing with the reachability/controllability of high order mix-valued logical control networks.     

Novel l2-l∞ controller design for LPV discrete time-delay systems

One of the first attempts to derive energy-to-peak performance criteria and state-feedback controller design problem for linear parameter-varying discrete time systems with time delay is provided. Firstly, we present a parameterdependent l2-l∞ performance criterion using a parameter-dependent Lyapunov function. Upon the conditions addressed,an improved parameter-dependent l2-l∞ performance criterion is established by the introduction of a slack variable,which exhibits a kind of decoupling between Lyapunov functions and system matrices. This kind of decoupling enables us to obtain more easily tractable conditions for analysis and synthesis problems. Then, the corresponding parameter-dependent state-feedback controller design is investigated upon these performance criteria, with sufficient conditions obtained for the existence of admissible controllers in terms of parameterized linear matrix inequalities. Finally, a numerical example is provided to illustrate the feasibility and advantage of the proposed controller design procedure.     

城市交通网络中的停车-换乘行为

在一次出行过程中,经常会使用停车-换乘方式．即出行的前一部分采用私家车方式．途中停车。再换来其他交通方式到达目的地。在停车-换来出行方式下．人们除了选择路径，还要选择换来站点。利用离散选择理论中的层次Logit结构模型，研究城市交通网络中的停车-换乘行为，定义多模式下停车-换乘出行的混合随机均衡分配条件，建立与之等价的数学规划模型，设计模型的求解算法，并用一算例分析算法的收敛性能和模型参数厦公交票价对解的灵敏度。     

A SYNTHESIS METHOD FOR TWO-ORDER UNCERTAIN SYSTEMS: AUTO-STABLE REGIONAPPROACH

1.IntroductionInrecentyears,thesynthesisproblemforuncertainsystemshasbeendeeplystudied.ManymethodssuchasLyapunov,thevariablestructurecontrol,theadaptivecontrolandtherobustcontrolmethodshavebeenproposed[IMS].Sincetheadaptivecontrolandtherobustcontrolmethod…     

参数不确定Liu混沌系统的模糊反馈控制

研究了新近提出的Liu混沌系统的模糊控制方法。在用T-S模糊模型重构了系统结构的基础上,利用反馈控制思想,设计了Liu混沌系统的模糊控制方法,并通过Lyapunov函数的推导得到了系统以衰减率α全局渐近稳定的充分条件。该方法适用于参数确定的系统和含有不确定参数的系统。文章对两种情况均进行了仿真实验。所有的控制参数可以通过LMI方法得到,仿真结果验证了该控制方法的有效性。该模糊控制方法在连续混沌系统中具有通用性。     

Theoretical Computation of Nonlinear System Equations of Heavier Pellets Movements for Two Phase Flow

This paper presents nonlinear ordinary differential equations (ODES) of the heavier pellets movement for two phase flow, which actually represent a system of equations. The usual methods of solution such as Runge -Kutta method and it's datum results are discussed. This paper solves ODES of general form using variable mesh-length, linearizing the nonlinear terms by finite analysis method, fuilding an iteration sequence, and amending the nonlinear terms by iteration . The conditions of convergent operation of iteration solution is checked. The movement orbit and velocity of the pellets are calculated. Analysis of research results and it's application examples are illustrated.     

基于贝叶斯网络自适应推理的无人机任务决策

针对不确定环境下无人机任务决策问题, 提出一种基于变结构离散动态贝叶斯网络的自适应推理算法. 该算法能够利用软/硬证据和先验信息动态地调整任务决策模型参数, 通过推理和参数学习互动的方式使任务决策模型具备适应动态环境的能力. 仿真证明, 提出的自适应推理算法能够在突发威胁信息不完备、先验参数不精确和先验参数无认知的情况下为无人机任务决策提供保障.     

A filter secant method with nonmonotone line search for equality constrained optimization

<正> This paper proposes a filter secant method with nonmonotone line search for non-linearequality constrained optimization.The Hessian of the Lagrangian is approximated using the BFGSsecant update.This new method has more flexibility for the acceptance of the trial step and requires lesscomputational costs compared with the monotone one.The global and local convergence of the proposedmethod are given under some reasonable conditions.Further,two-step Q-superlinear convergence rateis established by introducing second order correction step.The numerical experiments are reported toshow the effectiveness of the proposed algorithm.     

舰空导弹武器系统反应时间仿真研究

描述了舰空导弹反应时间基线网络模型的建立方法, 并以某型舰空导弹武器系统为例, 利用此模型并运用蒙特卡洛法对该武器系统在不同作战环境下的反应时间进行了仿真计算及分析, 同时讨论了人的素质对反应时间的影响, 得出了一些有益的结论。     

元胞蚂蚁算法的收敛性

蚁群优化算法是一种新型的解决组合优化问题的仿真型算法,在许多领域中都已获得成功的应用,但却有容易陷入局部最优的缺陷.本文将元胞自动机思想引入到蚂蚁算法中,提出一种新的元胞蚂蚁算法,通过算法的元胞演化机制对信息素的二次分配,改善了对解空间的搜索性能,并从理论上证明了算法的渐近收敛性.     

基于状态空间平均法的BOOST变换器仿真分析

DC—DC开关变换电路是一个时变的、非线性的动态系统，它的分析与设计一直是一个难题。通过数学推导阐述了状态空间平均法是平均法的一阶近似，并通过MATLAB软件进行典型升压变换器（boost　converter）的电划莫型和数学模型仿真对比，定量地讨论状态空间平均法模型的适用条件，说明状态空间平均法的本质，指出使用状态空间平均法时，一定要注意使用条件。     

Periodic Solution and Ergodic Stationary Distribution of Stochastic SIRI Epidemic Systems with Nonlinear Perturbations

This paper formulates two stochastic nonautonomous SIRI epidemic systems with nonlinear perturbations. The main aim of this study is to investigate stochastic dynamics of the two SIRI epidemic systems and obtain their thresholds. For the nonautonomous stochastic SIRI epidemic system with white noise, the authors provide analytic results regarding the stochastic boundedness, stochastic permanence and persistence in mean. Moreover, the authors prove that the system has at least one nontrivial positive T-periodic solution by using Lyapunov function and Hasminskii's theory. For the system with Markov conversion, the authors establish sufficient conditions for positive recurrence and existence of ergodic stationary distribution. In addition, sufficient conditions for the extinction of disease are obtained. Finally, numerical simulations are introduced to illustrate the main results.     

Sample average approximation method for a class of stochastic variational inequality problems

This paper considers a class of stochastic variational inequality problems. As proposed by Jiang and Xu (2008), by using the so-called regularized gap function, the authors formulate the problems as constrained optimization problems and then propose a sample average approximation method for solving the problems. Under some moderate conditions, the authors investigate the limiting behavior of the optimal values and the optimal solutions of the approximation problems. Finally, some numerical results are reported to show efficiency of the proposed method.     

一类比率依赖种群模型在常数收获下的分岔

利用微分方程定性理论以及规范型理论研究了一类具有常数收获项的生物模型.首先,考虑常数收获项对该模型非负平衡点的影响,讨论平衡点的稳定性情况.其次,选取常数收获项作为参数,给出系统存在鞍结点分岔、Hopf分岔以及极限环的充分条件.进一步地,考虑双参数分岔,给出系统存在余维2的Bogdanov-Takens分岔的充分条件.结果表明,由于添加了常数收获项,系统具有丰富的动力学行为.最后,通过数值仿真验证了所得结果的正确性.     

REGULARITY AND RECURRENCE OF SWITCHING DIFFUSIONS

This work is concerned with switching diffusion processes, also known as regime-switching diffusions. Our attention focuses on regularity, recurrence, and positive recurrence of the underlying stochastic processes. The main effort is devoted to obtaining easily verifiable conditions for the aforementioned properties. Continuous-state-dependent jump processes are considered. First general criteria on regularity and recurrence using Liapunov functions are obtained. Then we focus on a class of problems, in which both the drift and the diffusion coefficients are ＂linearizable＂ with respect to the continuous state, and suppose that the generator of the jump part of the process can be approximated by a generator of an ergodic Markov chain. Sufficient conditions for regularity, recurrence, and positive recurrence are derived, which are linear combination of the averaged coefficients （averaged with respect to the stationary measure of the Markov chain）.     

Mean Square Stability of Impulsive Stochastic Delayed Reaction-Diffusion Equations via Comparison Principle with Razumikhin Method

This paper investigates the mean square stability problem for impulsive stochastic delayed reaction-diffusion equations. By employing stochastic analysis theory, impulsive differential inequality technique and Razumikhin method, comparison principle for impulsive stochastic delayed reactiondiffusion equations is firstly established. Then, by using the comparison principle, some sufficient conditions are derived to ensure the mean square stability, mean square uniform stability, mean square asymptotic stability and mean square exponential stability of such systems. Finally, an example is provided to show the effectiveness of the proposed results.     

单值并元相关函数互补码偶的研究

提出了单值并元相关函数互补码偶的概念.这是一类比普通并元码概念更加广泛,但同样具有良好并元相关特性的最佳离散信号.研究了这类码的Walsh变换谱特性和重量分布特性.通过这些问题的研究,得到了这类码存在的必要条件,同时展示了Walsh变换新的应用.这些存在条件在这类码的理论研究和计算机搜索中有重要的作用.采用布尔函数方法研究了这类码的一些重要性质.从这些性质可以得到这类码的构造方法.