排序方式： 共有436条查询结果，搜索用时 46 毫秒
21.
《Journal of The Franklin Institute》2014,351(12):5250-5273
This paper presents a distributed event-based control approach to cope with communication delays and packet losses affecting a networked dynamical system. Two network protocols are proposed to deal with these communication effects. The stability of the system is analyzed for constant and time-dependent trigger functions, showing that asymptotic stability can be achieved with the latter design, and this also guarantees a lower bound for the inter-event times. Analytical expressions for the delay bound and the maximum number of consecutive packet losses are derived for different scenarios. Finally, the results are illustrated through a simulation example. 相似文献
22.
《Journal of The Franklin Institute》2022,359(5):2058-2072
This paper designs an incentive strategy for a class of stochastic Stackelberg games in finite horizon and infinite horizon, respectively. The obtained incentive Stackelberg strategy works well in the sense that the leader will get his desired solution in the end. Different from the existing works, the state-dependent noise is considered in the design of the incentive Stackelberg strategy. Moreover, the mean-square stabilization can be guaranteed by the follower. The algorithm procedure is put forward to obtain effectively the incentive feedback Stackelberg strategy in infinite horizon. Finally, two examples are given to shed light on the effectiveness of the proposed algorithm procedure. 相似文献
23.
《Journal of The Franklin Institute》2022,359(4):1706-1723
This paper investigates the event-triggered output synchronization of the heterogeneous linear multi-agent systems over directed switching networks. We first propose an internal model of the leader to track the state of the leader using intermittent communications without inducing Zeno behavior. With the computational algorithm proposed for continuously generating the combinational state demanded in the triggering condition, the internal model is implemented in a fully distributed manner. Then, a distributed event-triggered controller is constructed using the internal model to ensure that the output synchronization errors are globally exponentially convergent to a ball. A numerical example is presented to illustrate the efficacy of the theoretical results. 相似文献
24.
《Journal of The Franklin Institute》2022,359(5):1795-1820
For a class of large-scale nonlinear time-delay systems with uncertain output equations, the problem of global state asymptotic regulation is addressed by output feedback. The class of systems under consideration are subject to feedforward growth conditions with unknown growth rate and time delays in inputs and outputs. To deal with the system uncertainties and the unknown delays, a novel low-gain observer with adaptive gain is firstly proposed; next, an adaptive output feedback delay-free controller is constructed by combining Lyapunov-Krasovskii functional with backstepping algorithm. Compared with the existing results, the controllers proposed are capable of handling both the uncertain output functions and the unknown time delays in inputs and outputs. With the help of dynamic scaling technique, it is shown that the closed-loop states converge asymptotically to zero, while the adaptive gain is bounded globally. Finally, the effectiveness of our control schemes are illustrated by three examples. 相似文献
25.
中国有色金属行业的生态占用研究 总被引：3，自引：1，他引：3
中国有色金属行业能耗高、水耗大、三废产量大,属于环境污染比较严重的行业之一。本文通过考察有色金属行业的生态足迹及其构成和变化,分析了行业发展面临的环境压力状况。研究表明:①有色金属行业生态足迹近年来总体上一直处于上升趋势,其中能源消费间接占用地在总生态足迹中占主导地位;②分品种看,铝在有色金属行业生态足迹所占份额最大,达到53%,其次为铅锌、铜,占行业的比重分别为15%、12%,铝、铅、锌和铜这4种金属生态足迹为有色金属行业的80%,是决定该行业生态足迹大小的关键矿种,也是对行业产生环境压力、冲击和影响的主要来源;③有色金属行业近年来生态效率呈上升趋势,不仅其大小高于工业部门和三大产业部门的平均水平,其增长率相对也较高,这反映了现阶段行业生产依然是“高投入、高产出”的特点。该研究结果对于理解有色金属行业发展与环境保护之间的关系、制定行业可持续发展规划具有一定的参考价值。 相似文献
26.
区域创新是区域发展的核心动力，因此，基于区域创新的视角分析辽宁中部城市群建设的区域创新环境的现实基础以及问题，提出实施对策，既有利于辽宁中部城市群快速发展，也丰富了创新型区域和创新型城市的理论与实践的内容。 相似文献
27.
装备制造业企业技术集成能力及其构成因素分析 总被引：2，自引：0，他引：2
本文以装备制造业为研究对象，研究企业技术集成能力特点及其构成因素。分析技术集成能力在集成创新过程中的具体表现，揭示装备制造业企业技术集成能力特点，总结技术集成能力构成因素，通过问卷调查并借助因子分析，得到装备制造业企业技术集成能力构成因素及其衡量指标，为提升我国装备制造业企业技术集成能力提供分析工具。 相似文献
28.
王姝 《佳木斯教育学院学报》2011,(3):311-312
克服恐惧感对于舞蹈演员来说是一个非常值得关注的问题。本文从紧张感产生的原因出发,通过分析,建议采用脱敏练习法、自律训练法和练习过程自动化的方式来消除舞蹈演员在舞台上的紧张感与恐惧感。 相似文献
29.
In this paper, the leader-following consensus problem is investigated by event-triggered control for multi-agent systems subject to time-varying actuator faults. Firstly, for a case of the leader without control input, a distributed event-triggered fault-tolerant protocol is proposed with the help of adaptive gains. Secondly, the proposed protocol is developed by an auxiliary nonlinear function to compensate the effect of the leader’s unknown bounded input. It is shown that under the both obtained protocols the tracking errors converge to an adjustable neighborhood around the origin, meanwhile the Zeno behavior is avoided. Moreover, the protocols are fully distributed in sense that any global information associated with the network is no longer utilized. Finally, numerical examples are presented to show the validity of the obtained protocols. 相似文献
30.
This paper is concerned with the optimal stealthy attack problems of cyber-physical system, which is represented as discrete-time linear systems. It is considered that a deceptive attack assumed to be able to hijack and modify the nominal control signals from the controller-actuator channel with the metric of ? -stealthiness. Different from the existing literatures, some optimal attack strategies with objectives such that maintaining a fixed level of stealthiness and achieving the maximized performance degradation are designed under some constraints. It is further derived that the results of ours are more relaxed than some methods proposed before. Finally, some numerical simulations are given to illustrate the validity of the theoretical results. 相似文献