排序方式: 共有652条查询结果,搜索用时 15 毫秒
1.
《Journal of The Franklin Institute》2022,359(18):10867-10883
Various forms of the algebraic Riccati equation (ARE) have been widely used to investigate the stability of nonlinear systems in the control field. In this paper, the time-varying ARE (TV-ARE) and linear time-varying (LTV) systems stabilization problems are investigated by employing the zeroing neural networks (ZNNs). In order to solve the TV-ARE problem, two models are developed, the ZNNTV-ARE model which follows the principles of the original ZNN method, and the FTZNNTV-ARE model which follows the finite-time ZNN (FTZNN) dynamical evolution. In addition, two hybrid ZNN models are proposed for the LTV systems stabilization, which combines the ZNNTV-ARE and FTZNNTV-ARE design rules. Note that instead of the infinite exponential convergence specific to the ZNNTV-ARE design, the structure of the proposed FTZNNTV-ARE dynamic is based on a new evolution formula which is able to converge to a theoretical solution in finite time. Furthermore, we are only interested in real symmetric solutions of TV-ARE, so the ZNNTV-ARE and FTZNNTV-ARE models are designed to produce such solutions. Numerical findings, one of which includes an application to LTV systems stabilization, confirm the effectiveness of the introduced dynamical evolutions. 相似文献
2.
3.
Xiaona Song Xingru Li Shuai Song Yijun Zhang Zhaoke Ning 《Journal of The Franklin Institute》2021,358(4):2482-2499
This paper investigates the quasi-synchronization of reaction-diffusion neural networks with hybrid coupling and parameter mismatches via sampled-data control technology. First, the models of neural networks with switching parameter and fraction Brownian motion are given. As a result of parameter mismatches, synchronization is normally not possible to realize directly, then the improved Halanay’s inequality is introduced, which is an important lemma to prove that the considered networks realize quasi-synchronization. Furthermore, based on stochastic theory, Lyapunov function method and inequality techniques, some sufficient conditions are derived to guarantee the quasi-synchronization of hybrid coupled neural networks with reaction-diffusion terms driven by fractional Brownian motion. Finally, two simulation examples are given to prove the efficiency of the developed criteria. 相似文献
4.
He Zhang Qian Ma Junwei Lu Yuming Chu Yongmin Li 《Journal of The Franklin Institute》2021,358(3):1999-2014
This paper addresses the problem of synchronization control of neutral-type neural networks with sampled-data, where sampled data will be over a communication network before received by controller. Generally, the communication network is with a bandwidth-limited communication channel. To reduce network burden, an event-triggered scheme is designed between the sampler and communication network. A weak synchronization conditions are derived by using our proposed integral inequality. Finally, a numerical example is given to illustrate the effectiveness and advantage of the proposed results. 相似文献
5.
Ruimei Zhang Deqiang Zeng Ju H. Park Kaibo Shi Yajuan Liu 《Journal of The Franklin Institute》2021,358(4):2320-2345
This paper investigates the stability and stabilizability of complex-valued memristive neural networks (CVMNNs) with random time-varying delays via non-fragile sampled-data control. Taking the influence of gain fluctuations into account, a non-fragile sampled-data controller is designed for CVMNNs. Compared with the existing control schemes, the one here is more applicable and can effectively save the communication resources. The assumption on activation functions of CVMNNs is relaxed by only needing the complex-valued activation functions satisfying the Lipschitz condition. By constructing a suitable Lyapunov–Krasovskii functional (LKF), new stability and stabilizability criteria are derived for CVMNNs. Different from the existing results with the maximum absolute values of memristive connection weights, our ones are based on the average values of the maximum and minimum of the memristive connection weights. Finally, numerical simulations are given to validate the effectiveness of the theoretical results. 相似文献
6.
Single beacon navigation methods with unknown effective sound velocity (ESV) have recently been proposed to solve the performance degeneration induced by ESV setting error. In these methods, a local linearization-based state estimator, which only exhibits local convergence, is adopted to estimate the navigation state. When the initial ESV setting error or vehicle initial position error is large, the local linearization-based state estimators have difficulty guaranteeing the filtering convergence. With this background, this paper proposes a linear time-varying single beacon navigation model with an unknown ESV that can realize global convergence under the condition of system observability. A Kalman filter is adopted to estimate the model state, and the corresponding stochastic model is inferred for the application of the Kalman filter. Numerical simulation confirms that the proposed linear time-varying single beacon navigation model can realize fast convergence in the case of a large initial error, and has superior steady-state performance compared with the existing methods. 相似文献
7.
刘千秋 《内江师范学院学报》2014,(1):123-126
人教版、苏教版高中语文教材是目前全国使用范围比较广泛的两个版本。两个版本必修教材中的新诗选文在选文的数量、编排体系和内容方面都存在一些差异。两个版本的高中语文必修教材的经验表明,高中语文的新诗选编,必须摈弃选文的政治化、正统化、个人化、随意化,在选文时代性和典范性协调一致的前提下,应选择适合学生学习的、符合学生心理特点和认知程度的新诗。 相似文献
8.
基于马克思的实践观以及杜威和陶行知对“做”的教育理论探索,结合对中国社会和教育实践变革的反思,本文对话双方提出了实践教育哲学这一饱含鲜明时代精神的新教育哲学形态。在实践教育哲学看来,实践不仅是教育的现实品格,还是人的教育和生成的本质要求。离开了实践活动,不惟没有本真的教育,人和社会也会处于一种异化状态。实践教育哲学观照下的知识教学追求人的培养目的与手段,教育内容的感性活动基础与理性认识,科学真理与生产劳动之间的统一,旨在实现教育实践本身之理性自我澄明、人性无限完满和教育价值创造这三者之间的有效整合,通达万物一体之审美人格这一实践教育哲学的至高境界。 相似文献
9.
舒洪明 《内江师范学院学报》2014,(5):111-114
国家将在校大学生纳入城镇居民基本医疗保险范围,从制度上解决了在校大学生的医疗保险问题,但是当前大学生的参保率并不高.高校可以通过增加人手、广泛宣传、教育引导、主动服务、学校代买、补助购买、资助购买、免费赠送等措施来提高大学生医保的参保率,实现大学生医疗保险全覆盖. 相似文献
10.
社会主义核心价值体系是社会主义意识形态的本质体现,是贯彻落实科学发展观,构建社会主义和谐社会的精神支柱。在抗击汶川地震过程及灾后重建过程中,社会主义核心价值体系得到了生动实践,并发挥了持久的教育作用。高校社会主义核心价值体系建设关系到党和国家事业的兴旺发达。我们应积极探索总结当代大学生核心价值观,并采取各种方法进行普及。 相似文献