A novel approach to fault detection for fuzzy stochastic systems with nonhomogeneous processes

In this paper, we consider a class of fuzzy stochastic systems with nonhomogeneous jump processes. Our focus is on the design of a fuzzy fault detection filter that is sensitive to faults but robust against unknown inputs. Furthermore, the error filtering system is stochastically stable. With reference to an H1 performance index and a new performance index, sufficient conditions to ensure the existence of a fuzzy robust fault detection filter are derived. Simulation studies are carried out, showing that the proposed fuzzy robust FD filter can rapidly detect the faults correctly

Robust stabilization of uncertain impulsive switched systems with delayed control

AbstractIn this paper, stability criteria and switching controllers’ design problems for uncertain impulsive switched systems with input delay are investigated by using the receding horizon method. Some LMI conditions are derived to guarantee asymptotical stability of an impulsive switched system under a certain designed delayed controller. Finally, a numerical example is presented to illustrate the effectiveness of the results obtained

Penggunaan bahasa Orang Asli Che Wong di Kuala Gandah

Kajian ini meneliti penggunaan bahasa masyarakat Orang Asli Che Wong. Tujuan kajian ini adalah untuk mengetahui bagaimana penggunaan bahasa CheWong dalam domain keluarga dan kekeluargaan mereka Suku kaum Che Wong merupakan suku kaum Orang Asli Senoi. Namun begitu masyarakat bahasa Che Wong mempunyai bilangan yang kecil. Kajian tertumpu di perkampungan Orang Asli Che Wong, Kuala Gandah. Analisis data tertumpu kepada penggunaan bahasa Che Wong dengan mengaplikasikan kaedah deskriptif iaitu menggunakan pendekatan analisis domain. Hasil kajian mendapati bahawa masyarakat bahasa Che Wong masih cenderung menggunakan bahasa mereka dalam berinteraksi walaupun bahasa Melayu merupakan bahasa pengantar antara mereka dengan masyarakat setempat. Fenomena ini merupakan suatu yang positif kerana sesuatu bahasa terutamanya bahasa masyarakat minoriti akan dapat dikekalkan dengan adanya penggunaan yang aktif oleh mereka sendiri

Study of near consensus complex social networks using Eigen theory

This paper extends the definition of an exact consensus complex social network to that of a near consensus complex social network. A near consensus complex social network is a social network with nontrivial topological features and steady state values of the decision certitudes of the majority of the nodes being either higher or lower than a threshold value. By using eigen theories, the relationships among the vectors representing the steady state values of the decision certitudes of the nodes, the influence weight matrix and the set of vectors representing the initial state values of the decision certitudes of the nodes that satisfies a given near consensus specification are characterized

A dual parametrization approach to Nyquist filter design

In this paper, the optimum design of a factorable Nyquist filter with the intersymbol interference (ISI) being exactly zero is formulated as a nonlinear optimization problem with continuous inequality constraints. An iterative scheme is developed for solving this semi-infinite optimization problem, where an improved dual parametrization method is utilized in each iteration of the iterative scheme. Trade-off between robustness against timing jitter and small stopband attenuation is achieved via an adjustment of a parameter. Some examples are solved using the proposed iterative method

Higher-order Mond-Weir duality for set-valued optimization

2008-2009 > Academic research: refereed > Publication in refereed journa

Optimal cosine modulated nonuniform linear phase FIR filter bank design via stretching and shifting frequency response of prototype filter

This paper proposes an optimal cosine modulated nonuniform linear phase finite impulse response (FIR) filter bank design. The frequency responses of all the analysis filters and the synthesis filters of the filter bank are derived based on both stretching and shifting the frequency response of the prototype filter. The total aliasing error of the filter bank is minimized subject to a specification on the maximum amplitude distortion of the filter bank as well as specifications on both the maximum passband ripple magnitude and the maximum stopband ripple magnitude of the prototype filter. This filter bank design problem is actually a functional inequality constrained optimization problem. Our recently developed integration approach is employed for solving the problem. Computer numerical simulation results show that our proposed design method outperforms existing design methods