AHP Fuzzy Comprehensive Evaluation-Based Research on Coordination Between Water Resources and Urban Economic Social Development in Western China

Setting the effect evaluation on coordination between water resources and urban economic social development in western China as object, this thesis applies methods of literature review and on-the-spot investigation to establish evaluation index system. And by AHP and multi-level fuzzy comprehensive evaluation, this thesis conducts the empirical research on 11 provinces or regions in western China and outcomes problems as insufficient economic structure optimization, and then puts forward countermeasures and suggestions from the coordination of effective utilization of water resources to promote economic social development

Mean-square stability of linear systems over channels with random transmission delays

This work studies the mean-square stability and stabilization problem for networked feedback systems. Data transmission delays in the network channels of the systems are considered. It is assumed that these delays are i.i.d. processes with given probability mass functions (PMFs). A necessary and sufficient condition of mean-square (input-output) stability is studied for the networked feedback systems in terms of the input-output model and state-space model. Furthermore, according to this condition, mean-square stabilization via output feedback is studied for the networked feedback systems.Comment: arXiv admin note: text overlap with arXiv:2108.1279

Robust control of cascaded uncertain nonlinear systems

This thesis will discuss robust stabilization and robust performance for some classes of nonlinear systems. First, we consider a class of minimum phase nonlinear systems which are subjected to bounded parameter uncertainties. The problem addressed is to design a static state feedback controller such that the resulting closed loop system is passive for all admissible uncertainties. A nonhnear passifying controller is derived. It is shown that the controller also guarantees the system to be zero input bounded-state stable.Master of Engineerin

Robust Nonlinear Forwarding with Smooth State Feedback Control

. In this paper, a robust forwarding control technique is introduced for a class of uncertain nonlinear systems admitting the so-called upaugmented structure. This technique gives a recursive design procedure which yields a smooth controller. Further, it can be combined with the wellknown back-stepping technique to solve the robust stabilization problem for a large class of uncertain nonlinear systems. In contrast to previous methods on nonlinear forwarding, our technique is able to handle systems with large parameter uncertainties. Keywords: Nonlinear systems; Forwarding; Robust stabilization; State feedback. 1 Introduction In this paper, we consider the robust stabilization problem for a class of uncertain nonlinear systems admitting the so-called up-augmented structure. This structure starts with a base system of the following form: x(t) = f(x(t); q) + b(q)u(t) (1) where x(t) 2 R n is the state, u(t) 2 R is the control, q 2 R l is an uncertain parameter vector contained in ..

A polynomial method for blind identification of MIMO channels

In this paper, the blind identification problem for a multiple-input multiple-output (MIMO) channel is investigated by applying the spectral factorization method. The existing conditions on blind identification from signal's second order statistics (SOS) are relaxed by introducing an MIMO pre-filter in the transmitting side of the channel. A design criterion of the pre-filter in the frequency domain is given. Based on the properties of this pre-filter, a blind identification algorithm from SOS is developed. Simulation results show that this algorithm is effective in modelling MIMO FIR channels

Robust Nonlinear Forwarding Design

This paper considers the problem of robust stabilization for a class of nonlinear up-augmented systems with uncertain parameters in a very general form. This system involves a base system with a control input and a forwarding structure. Several robust control design methods are discussed for the cases in which these parts of the system are in SISO and MIMO forms, respectively. The main assumptions required for these methods are quadratic stabilizability for the local linearized model of the system, global asymptotic stabilizability for the base system and some mild conditions on the up-augmentation and the nonlinearity of the system

Robust Stabilization of a Class of Nonlinear Systems with an Upper-triangular Structure

. In this paper, a class of nonlinear uncertain systems with an upper-triangular structure is considered and a design method is proposed for robust stabilization via state feedback. The upper-triangular structure has been considered in the literature of forwarding design. But our method has a unique feature, i.e., we allow uncertain parameters (of large size) to be present in the system. Also, our design method is conceptually different from those available in the literature. When specialized to linear systems, we recover an important result of Wei on quadratic stabilization. Keywords: Nonlinear systems; Forwarding; Robust stabilization; State feedback. 1 Introduction This paper studies the problem of robust stabilization for nonlinear systems which have an upper-triangular structure: x 1 = f 1 (x 2 ; \Delta \Delta \Delta ; xn ; q) . . . xn\Gamma1 = fn\Gamma1 (x n ; q) xn = fn (x 1 ; \Delta \Delta \Delta ; xn ; q) + u (1) where x 1 ; \Delta \Delta \Delta ; xn are state variab..