关于约束方差控制器的评估问题的研究

本文研究当系统的性能指标表现为系统输入及输出的方差约束时一类随机控制器的评价问题，给出了系统反馈输入及输出的辨识算法，该算法可用来评价反馈控制器能否使反馈系统满足既定的方差约束，以便在对实际系统实施控制之前及时调整控制器，从而达到设计目的。     

901快速强力胶的研制

详细论述了一种新型改性SBS溶剂型胶粘剂的配方设计、制备工艺、基本性能等有关问题。     

改性SBS胶粘剂的研制

以丙烯酸酯类混合单体对SBS热塑性弹性体在混合溶剂中接枝共聚，添加混合型增粘树脂，研制成接枝改性的SBS胶粘剂，具有较高的初粘力和终强度。探讨了单体比例、引发剂用量、反应温度、反应时间、增粘树脂对胶液性能的影响。     

state estimation with fading measurements,randomly varying nonlinearities and probabilistic distributed delays

In this paper, the state estimation problem is investigated for a class of discrete‐time stochastic systems in simultaneous presence of three network‐induced phenomena, namely, fading measurements, randomly varying nonlinearities and probabilistic distributed delays. The channel fading is characterized by the ?th‐order Rice fading model whose coefficients are mutually independent random variables with given probability density functions. Two sequences of random variables obeying the Bernoulli distribution are utilized to govern the randomly varying nonlinearities and probabilistic distributed delays. The purpose of the problem addressed is to design an state estimator such that the dynamics of the estimation errors is stochastically stable and the prespecified disturbance rejection attenuation level is guaranteed. Through intensive stochastic analysis, sufficient conditions are established under which the addressed state estimation problem is recast as a convex optimization one that can be solved via the semi‐definite program method. Finally, a simulation example is provided to show the usefulness of the proposed state estimation scheme. Copyright © 2014 John Wiley & Sons, Ltd.     

Observer-based networked control for continuous-time systems with random sensor delays

This paper is concerned with the networked control system design for continuous-time systems with random measurement, where the measurement channel is assumed to subject to random sensor delay. A design scheme for the observer-based output feedback controller is proposed to render the closed-loop networked system exponentially mean-square stable with H_∞ performance requirement. The technique employed is based on appropriate delay systems approach combined with a matrix variable decoupling technique. The design method is fulfilled through solving linear matrix inequalities. A numerical example is used to verify the effectiveness and the merits of the present results.     

A note on the robust stability of uncertain stochastic fuzzy systems with time-delays

Takagi-Sugeno (T-S) fuzzy models are now often used to describe complex nonlinear systems in terms of fuzzy sets and fuzzy reasoning applied to a set of linear submodels. In this note, the T-S fuzzy model approach is exploited to establish stability criteria for a class of nonlinear stochastic systems with time delay. Sufficient conditions are derived in the format of linear matrix inequalities (LMIs), such that for all admissible parameter uncertainties, the overall fuzzy system is stochastically exponentially stable in the mean square, independent of the time delay. Therefore, with the numerically attractive Matlab LMI toolbox, the robust stability of the uncertain stochastic fuzzy systems with time delays can be easily checked.     

Observer design and stabilization for linear neutral delay systems

This paper focuses on the state observer design problem as well as the observer-based stabilization problem for linear neutral delay systems. The purpose of the former problem is to design an observer that guarantees the asymptotic stability of the estimation error dynamics. The existence condition for such an observer is established. The latter problem, which is the main problem studied in this paper, aims at designing an observer-based feedback controller, such that the closed-loop system is asymptotically stabilized. It is shown that the desired controller can be easily designed if there are solutions to several linear matrix inequalities. Finally, two simulation examples are given to demonstrate the validity and effectiveness of the proposed approach.     

建筑能耗审计与能耗重点环节定位研究

通过对建筑能耗审计截至目前的试行阶段中存在的问题进行分析,指出了已建成的大量建筑中无法实现能耗分项计量是制约建筑能耗审计的最主要问题。进一步介绍了建筑能耗审计工作的具体内容和方法,给出了一些建筑能耗审计的案例分析,并建议通过建筑能耗分析模拟软件对建筑能耗审计的数据结果进行分析处理,以定位出建筑能耗的重点环节。通过具体的模拟分析案例,对当前比较典型的建筑能耗模拟分析软件进行了介绍。在结论中强调了大型公共建筑和大型建筑综合体应作为建筑能耗审计的重点,对此类建筑应能够实现建筑能耗的分项计量。提出了建筑能耗审计工作是政策性与技术性统一的原则,相关制度的确立是建筑能耗审计工作的重要保证。