an adaptive input-output linearization method for general nonlinear systems is developed without using states of the system. another key feature of this structure is the fact that, it does not need model of the system. in this scheme, neurolinearizer has few weights, so it is practical in adaptive situations.  online training of neurolinearizer is compared to model predictive recurrent training...

Hierarchies are used in data warehouses (DWs) and on-line analytical processing (OLAP) systems to see data at different levels of detail. However, many kinds of hierarchies arising in real-world situations are not addressed by current OLAP systems. Further, there is still no agreement on a conceptual model for DW and OLAP design that offers both a graphical representation and a formal definitio...

the arc costs are assumed to be online parameters of the network and decisions should be made while the costs of arcs are not known. the policies determine the permitted nodes and arcs to traverse and they are generally defined according to the departure nodes of the current policy nodes. in on-line created tours arc costs are not available for decision makers. the on-line traversed nodes are f...

Parallel execution of DES programs seems a natural way to improve performance, as some notion of concurrent processes inheres in most DES systems. Consequently, researchers have devoted a substantial amount of research to PDES in the last decade. (The "DES" and "PDES" sidebars offer more details on these subjects.) Practitioners have not, however, used PDES methods to solve real-world problems ...

views of the object graph Jitan users can abstract an object graph that represents a Java program's execution. An abstraction lets programmers consider real Java programs with a large number of objects and threads. It also

Such a scenario introduces peculiar and challenging requirements in the development of distributed software systems. Because new agents (we use this term generically to indicate a distributed application's active components) can depart out of and arrive into the network at any time and roam across different environments, applications must be able to deal with such activity adaptively and indepe...

Since its origin in the 1970’s research and development into databases systems has evolved from simple file storage and processing systems to complex relational databases systems, which have provided a remarkable contribution to the current trends or environments. Databases are now such an integral part of day-to-day life that often people are unaware of their use. For example, purchasing goods...

demand for scalable and dependable distributed computing systems. E-commerce and online stock trading systems are examples. These systems concurrently serve many clients that transmit a large, often "bursty," number of requests and have stringent quality of service requirements. To protect hardware investments and avoid overcomitting resources, such systems scale incrementally by connecting ser...

ion getLL();Get the lower level abstraction of thisentity. Void setLL(In Abstractionabst);Set the lower level abstraction of thisentity. Abstraction getHL();Get the higher level abstraction of thisentity.ion getHL();Get the higher level abstraction of thisentity. Void setHL(In Abstractionabst);Set the higher level abstraction of thisentity. Operat...

This section includes the second batch of six papers that will be presented as Works in Progress papers at the ACM/IFIP/USENIX International Middleware Conference (Middleware 2003) (http://middleware2003.inf.puc-rio.br). These papers, selected by the review committee from a large selection of excellent submissions, are short summaries intended to describe ongoing work and interim results. Pleas...