The paper presents a new approach for model–based diagnosis for hierarchically structured discrete–event systems. The efficiency of this method results from the fact that the complexity of the diagnostic task is reduced by first detecting and identifying a faulty module using a coarse model of the system on a high level of abstraction and subsequently refining the diagnostic results by using a ...

In this paper, for nonlinear, time-varying and delayed system, PID parameters self-tuning fuzzy control was applied to a level process. The method of using VC++ programming to realize fuzzy control algorithm and obtain the discrete fuzzy control table is proposed, which simplified the computing process greatly. Furthermore, combing the inquiry of fuzzy control table and PID function module in P...

The aim of this work is to show that (oriented) matroid methods can be applied to many discrete geometries, namely those based on modules over integral (ordered) domains. The trick is to emulate the structure of a vector space within the module, thereby allowing matroid methods to be used as if the module were a vector space. Only those submodules which are “closed under existing divisors,” and...

The Video Compressor/Decompressor (CODEC) performs compression and decompression of video data by combining a Motion estimation and compensation module, Transformation module, and Entropy encoding module. Among these three modules, the spatial redundancy can be eliminated by the transformation module which exists in the spatial domain of video sequence. Discrete Cosine Transformation (DCT) is t...

A novel paradigm for adaptation in discrete event dynamic systems control is presented. The general idea is then applied, through simulations, to an inventory system. A fuzzy adaptation module is built from few optimal examples generated using a genetic algorithm. The fuzzy module is then capable of adapting the inventory policy achieving much better results than a static policy.

The realization of a wavelet-based iterative learning controller (WILC) is presented in this paper. To meet the requirements of simplified hardware, fast rapid prototyping and fast up-date cycle, a wavelet-based iterative learning control system is implemented on a single FPGA (Field Programmable Gate Array) . There are three modules in this FPGA-based system, they are a feedback module, a disc...

The static and analytic scheduling approach is very difficult to follow and is not always applicable in real-time. Most of the scheduling algorithms are designed to be established in offline environment. However, we are challenged with three characteristics in real cases: First, problem data of jobs are not known in advance. Second, most of the shop’s parameters tend to be stochastic. Third, th...

The associahedron is an object that has been well studied and has numerous applications, particularly in the theory of operads, the study of non-crossing partitions, lattice theory and more recently in the study of cluster algebras. We approach the associahedron from the point of view of discrete homotopy theory. We study the abelianization of the discrete fundamental group, and show that it is...