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A heuristic control design scheme is proposed for multivariable nonlinear processes. The control design problem is considered to be formulated as an optimization under constraints problem. Actuator, state and/or output variable constraints may be considered. The proposed heuristic control design scheme is based on a metaheuristic search algorithm, that utilizes process simulation blocks in a black-box...
E-learning is a general term used to refer to computer-enhanced learning. The most notable advantages of elearning are flexibility, convenience and the ability to work at our own pace. Other advantages include the ability to communicate with fellow classmates from around the country. However, a common problem of usual e-learning approach is the lack of facetoface interaction with a teacher. The most...
In this paper we present an overview of the definitions of the terms of trust and reputation from the literature. Trust and reputation have been defined in different ways by the various researchers. As a result of these various definitions of trust and reputation there is a lot of confusion regarding what these terms actually mean. Additionally in the literature there is no work towards collecting...
In electrical power systems, asset management procedures have developed into a central element of network operations and planning. Hidden Markov Models (HMM) can be used to transform various data collected from substation equipment into failure probabilities. Based on these failure probabilities a mathematical decision tool can be created, which could be used in system-level simulation and experimentation...
This paper addresses the reliability of neuro- classifiers for bank note recognition. A local principal component analysis (PCA) method is applied to remove non-linear dependencies among variables and extract the main principal features of data. At first the data space is partitioned into regions by using a self- organizing map (SOM) model and then the PCA is performed in each region. A learning vector...
Locating sensors in 2D can be often modelled as an Art Gallery problem. Tasks such as surveillance require observing or ??covering?? the interior of a polygon with a minimum number of sensors or ??guards??. Observing the boundaries of a polygonal environment is sufficient for tasks such as inspection and image based rendering. As interior covering, also Edge Covering (EC) is NP-hard, and no finite...
The addition of wireless identification technologies to provide persistent identifiers for food products will become a key mechanism to enhance the consumer experience. This paper presents the use of RFID track and tracing technology to help create a safer and more manageable mean of transporting perishable comestibles with trucks over complicated delivery routes. METATRO attempts to integrate conventional...
Several missions of the ESA Science and Earth Observation Programmes rely on three key technologies: interferometry, micro-propulsion and formation flying. Satellite-to-satellite laser interferometry allows detecting very small distance variations over very long baselines so as to detect gravity anomalies. Interferometry of the same light beams collected by a telescope formation may detect exoplanets...
Robustness and performance analysis for a control system with a PID controller tuning from optimal settings are presented. Those analysis are conducted from the point of view of the stability margins characterization and of the operating mode (either servo or regulation mode) of the control loop and tuning mode of the controller, respectively. It is well known that, specially for optimization based...
Simple algebraic criteria are derived for the solvability of the combined problem of I/O Decoupling and Disturbance Rejection (DDR) for general neutral multi-delay systems with measurable and nonmeasurable disturbances, via proportional measurable disturbance feedback and measurement output feedback. Additionally, the necessary and sufficient conditions, for the problem to admit a realizable solution,...
There are numerous methods to achieve Web service composition, ranging from semi-automatic to on-the-fly automated processes. This paper proposes an approach to semantic Web service composition based on an AI-planning-like algorithm, which proceeds in a depth-first state-space search manner. Features include name matching, semantic similarity computation, cycle detection and optimization. The system...
Based on the integration of the Service-oriented Architecture (SoA) paradigm and existing 2D/3D based engineering systems, a new approach and corresponding tools for the design, development and application of modular virtual Web based production automation devices is presented in this paper. As a part of a 3D Product Lifecycle Management (PLM) solution, Delmia Automation was used to model the SoA...
Today manufacturers require efficient reaction to critical events occurring at the shop floor. Therefore, devicelevel data needs to be integrated into business processes in a standardized and flexible way to avoid time-consuming media breaks. Current approaches are characterized by a late indication of changes in the production environment and a delayed implementation of changed production plans....
Various types of tablets produced by pharmaceutical industry must be easily and accurately identified by customers. Besides tablet's shape, size and colour, additional visual features such as tablet imprints are necessary for unique identification and, at the same time, the tablets should comply with the high visual quality standards. We focused on visual quality inspection of imprinted tablets by...
Surveillance of mobile office assets is made by attaching wireless sensor nodes to assets and to their authorized users. The wireless sensor nodes are monitored via radio base access points connected to a distributed application framework for analysis and coordination of security events. By logic rules applied to the event information, temporarily stored and accessible in a distributed tuple space,...
This paper describes a system that generates intelligent alarms using sensor data located at various geographical locations. Users are informed, using a rule enabled engine whenever certain conditions demanding attention occur, through an SMS messaging system. The user can easily define, through a graphical user interface, new rules or update existing ones. An agricultural case study of the system...
We present an algorithm for computing a compact polygonal boundary of physical phenomena that nodes in a wireless sensor network can detect. It works strictly local and is robust against measurement errors and packet loss. It can deal with non-convex shapes and assumes nothing but location awareness at the nodes and a loose time synchronization. Other than different schemes described in literature...
The PROFINET architecture can provide real-time, high-performance, isochronous communication regardless the presence of other real-time data exchange and TCP/IP traffic for a considerable portion of network bandwidth. In this work some experimental tests have been executed in order to evaluate timing performance of a PROFINET ASIC (ERTEC 400 chip) and its related development kits. Results shows that...
This work describes a model for distributed dynamic Production Planning and Control (PPC) agent based system, which includes interoperation with manufacturing automation. It is presented a demonstration prototype involving distributed software agents and industrial equipment integration, which implements part of the developed model functionalities. Clients can send orders, and resources may apply...
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