The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In a world of the global communications, with continuous expansion to new horizons, which requires anytime and anywhere access to information sources, the need to manage the communication requirements is a very important issue. Traditional IP networks are facing difficulties in ensuring, to a user, a specific bandwidth[1] level for network access. Related to this matter, in this article we are proposing...
Automatic localization of services at the time of logical modeling is a difficult task. This is because of the complexity of models and the scattered nature of enterprise architecture information in organizations, systems as well as actors and applications. However, all information about logical services is described in the eLEL and in the aspects of the business architecture of the Praxeme methodology...
This paper describes an RDF data model for repositories concerned with managing various aspects of the life cycle of research outputs, such as articles, data sets or learning objects. Using the figshare application as a use-case and starting from its relational model, it proposes a new mechanism for storing, enhancing and disseminating metadata, using workflows specific to the linked data ecosystem,...
In the context of an impressive development of software defined networks and of internet technologies, this paper presents the aspects related to the implementation of an online wideband multimode radio receiver. The receiver was developed considering its main application in LEO satellite data reception, for frequencies up to 1.7 GHz. In additional to the hardware implementation description, the paper...
Feature selection represents a key stage in electroencephalogram (EEG) classifications, because these applications involve numerous, high-dimensional samples. In recent literature, a multitude of supervised embedded feature selection procedures has been proposed. Regardless if they are configured as Single Objective (SOO) or Multi-Objective Optimizations (MOO), the embedded methods assess the quality...
Until recent years, industrial control systems relied on wires to transfer the process values and control signals through an industrial plant. The use of wireless is limited to monitoring non-critical process values and using it for process control was uncommon for several reasons: complexity of usage, reliability, power consumption and a general doubt on its advantages. Wireless technology has made...
A combination of fuzzy control and sliding mode control (FCSMC) dedicated to control a ferromagnetic sphere in magnetic levitation systems is suggested. Since the process is unstable and nonlinear, it is first linearized at several operating points and a stabilizing state feedback control structure (SFCS) is designed. A proportional-integral (PI) sliding mode control (SMC) is next designed such that...
Maximal Clique and Maximum Clique are two related and famous computational problems known to be intractable in the most general case. We propose a formulation of the Maximal Clique problem as a Boolean Satisfaction problem. The constraints are then mapped to a Constraint Logic Programming representation. The resulting representation can be input to a Constraint Logic Programming system that can be...
MODBUS is still one of the most widespread application layer protocols used in industrial communication due to its simple request-response communication session and its readiness to be implemented on top of several lower level communication protocols and various physical media such as RS232/RS485 serial lines and Ethernet TCP/IP. Given the well-known inclination of Modbus to inter-networking, a solution...
This paper presents the development of an energy efficient environmental sensor that sends measurement data to a cloud platform using HTTP (Hypertext Transfer Protocol) requests. The device is based on a programmable system-on-chip (PSoC), and is equipped with a temperature and relative humidity sensor for taking measurements and with a WLAN (wireless local area network) module for sending data to...
A method for decentralized stabilization of positive descriptor linear systems is proposed. Necessary and sufficient conditions for the decentralized stabilization of the positive descriptor linear systems are established. The efficiency of proposed method is demonstrated on numerical example.
In this paper a control algorithm is developed for a small photovoltaic panel in order to maximize its generated power. The objective is to develop a numerically simple to implement method to control a buck dc-dc converter. The basic idea behind this research is to create an optimization block to determine the maximum power point according to the current radiation and temperature and to use its output...
In this paper we describe the 3D acquisition component integrated in the Sound of Vision (SoV) system. SoV is a computer vision based sensory substitution device (SSD) for the visually impaired. Its main objective is to provide the users with a 3D representation of the environment around them, conveyed by means of the hearing and tactile senses. One of the biggest challenges for the SoV system is...
Visual feedback is a very important component for re-learning motor tasks in post stroke recovery. In this paper, a virtual reality (VR) based system for stroke recovery for upper limbs is described, where the patient is immersed with the help of a Head Mounted Display (HMD). The HMD renders a 3D scene containing the avatar of the patient, from a virtual camera position placed on the head of the avatar...
The paper presents a control system for biotechnological processes, using an image processing-based biomass concentration transducer. The advantages of using such transducers are the low price and the response time, which is faster than any off-line measuring method. These advantages do not exclude the accuracy of the measurement. The chosen case study is a yeast growth process, a typical biotechnological...
This paper addresses the classical, yet challenging, trajectory generation problem for a particular USV (Unmanned Surface Vehicle) used in environmental monitoring applications. The focus is placed on scenarios which involve reaching a target while remaining in communication with the network. Both isotropic (concentric communication area) and anisotropic (directed communication area) antenna are considered...
In this work, we address the problem of reducing the vibrations in the case of a thin flexible beam, with an Euler-Bernoulli configuration thanks to a new type of feedback controller based on a delayed proportional action. The flexible structure is equipped with two piezoelectric patches: one of them works as a sensor and the other as an actuator. Each one of them is bonded on one side of the beam...
The paper presents a software system created to allow to use a user-friendly interface in order to describe complex surfaces which a robot system will follow, with applications in robot milling or engraving. The experimental system used for testing is composed by a 6 degree of freedom IRB 140 ABB robot with tools for engraving of milling, having the PC Interface option for communication and a PC which...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.