In this paper we consider a projection method for convex feasibility problem that is known to converge only weakly. Exploiting a property concerning the intersection of a family of convex closed sets, we present a condition that makes them strongly convergent, without additional assumptions.

Articolul prezintă câteva studii legare de controlul accesului la reţea, tehnologii şi protocoale implementate şi administrate cu scopul de a reduce la minimum riscul şi efectele unui acces neautorizat la resurse. Lucrarea prezintă câteva protocoale care rezolvă problema controlului accesului la reţea: protocolul PPP (Point-to-Point Protocol), care stabileşte termenii de negociere, menţinere şi încheiere a comunicaţiei, protocolul EAP, care descrie mecanisme de autentificare şi protocolul RADIUS, care asigură servicii centralizate de autorizare. Toate acestea permit o administrare şi o monitorizare centralizată a aspectelor legate de controlul accesului la reţea

The gravity center of a polygonal closed surface is one of the most frequently used technical applications necessary for a computer aided design project. The algorithm for calculating this gravity center and its implementation in AutoLisp of AutoCad are displayed below. Concerning the programming technique, this AutoLisp program is a perfect example of AutoCAD’s CAD applications development.

This paper reveal a few views about the results obtain in modelling of laminar flow throw a rectangular section. It is present the velocity and temperature distribution in two section.

The purpose of this article is to realize an analysis for two methods that can be considered in order to create a parallel algorithm for pattern searching into a text. First, we are dealing with "Divide-and-Conquer" type approaches. Next, we are considering another type of approach, based on the decomposition of the initial problem into several simpler problems and with different initial data, but similar solutions. An algorithm for the later situation is sketched, in order to reveal some of the (possible) features of algorithms of this type.

The processing of the difficult materials and profiles through unconventional procedures has a lot of industrial utilizations due to the numerous productivity and time-saving advantages it provides. The present study presents the way to establish an optimal processing regime using the current to regulate the time of debiting.

Durring the debiting process of the materials and profiles through unconventional technologies, electric factors can be used to manage the process. There is presented a mathematical pattern which allows to select an adecuate electrical tension and current for best results.

During last years, vector quantization becomes a powerful technique for data compression, in particular for image and speech signals. This paper, structured as two part series, present a tutorial on vectorial coding, introducing the fundamentals vectorial cuantizer and of adaptive vectorial coding as a method for coding nonstationary sources. Part two presents a general mathematical definition of adaptive vector quantization and an original classification.

In last years, vector quantization becomes a powerful technique for data compression, in particular for image and speech signals. This paper, structured as two part series, present a tutorial on vectorial coding, introducing the fundamentals vectorial cuantizer and of adaptive vectorial coding as a method for coding nonstationary sources. Part two presents a general mathematical definition of adaptive vector quantization and an original classification.

În mediul global competitiv de faceri din zilele noastre, este crucial pentru organizaţii să înţeleagă şi să gestioneze toate informaţiile din interior pentru a lua decizii în timp real şi a răspunde la schimbările continue din mediul de faceri. Ca o consecinţă, multe organizaţii se orienteaza spre o folosire exhaustivă a datelor pe care le deţin, prin folosirea conceptului de „depozit de date” (Data Warehouse, DW).

The present study is a modern concept concerning the relation client-bank, concept which has undergone a continuous evolution, as new IT concepts and technologies are implemented. There is presented a comparative study on the e-Banking, i-Banking and m-Banking services provided by the Romanian bank market.

The present study is a review of the actual aspects regarding the implementation of some banking data systems and it presents the authors’ standpoint, based on the personal professional experience in the domain, concerning the implementation of new IT solutions. There are presented different types of data systems, as well as the creation and implementation principles and concepts with direct reference to the architecture of the modern banking data systems.

The theory of errors is concerned with the expression of the influence of one or more error sources to which computed or observed quantities are subjected. Also, it is trying to establish a relation between the magnitude of an error and the probability of its occurrence. In this article, we are briefly presenting the main characteristics for the random error and the systematic error and we are introducing some aspects of the error propagation theory.

In this paper we are introducing the Chebyshev polynomials together with their most important properties. Those polynomials are playing an essential role for the optimization of Richardson method, presented here in a schematic form. This is a problem similar to another classical problem in numerical analysis: the identification of the best approximation of a regular function by an interpolating Lagrange polynomial. The Chebyshev polynomials are representing a remedy against the loss of signifiance or illconditioning in approximation problems.

In this paper I puropse to implement a multiplication device with unsigned two 8 biti integer numbers using synchronous sequential automata. This device could be done clasic using only basculant bistabiles circuits (CBB D, T, R-S, J-K) or using printed secquentiator (PS) and Automata Execution Elements (AEE). The second option was choice because implementation is more simply and clearly. This paper is moore didactic and it is succesuffuly used on Digital Sistem lab.

Lately the Internet has become an efficient way of trading, e-commerce. This article is focused on the importance of the e-commerce and on the database used in order to stock the useful dates.

In this paper is presented the artificial inteligence genetic computation concept. "The power of the brain stems not from any single, fixed, universal principle. Instead it comes from the evolution (in both the individual sense and the Darwinian sense) of a variety of ways to develop new mechanisms and to adapt older ones to perform new functions."

In this paper is presented image processing concept and methods. Image processing, analysis and machine vision represents an exciting part of modern cognitive and computer science, which man kind has started to use for his own benefit. The methods presented here are the methods that are used today in image processing.

The purpose of this paper is to explain the way the ADC's function. Several types of ADC's are compared from the functional and from the performance point of view. Advantages and disadvantages are show in order to define the characteristics.

The purpouse of this paper is to explain the application of electronics in autovehicoles, from the standpoint of electronic systems and subsystems. The system approach to describe automotive electronics is done by functional description of the groups. It is not intended to describe all electronic system, but only those that are more up to date.

The quick development of e-mail during the last years has brought publicity on homepage as a communication modality of commercial and non-commercial companies. The paper analyses from different perspectives publicity modalities on homepage in order to make it useful to the one who sends it as well as to its recipient. These are all specific issues deriving from the development of electronic trade, as an unquestionable reality of present days.

The ADE7754 is a high accuracy three-phase electrical energy measurement IC with a serial interface and a pulse output. The ADE7754 incorporates second order sigma delta ADCs, reference circuitry, temperature sensor, and all the signal processing required to perform Active Energy measurement, Apparent Energy measurement and RMS calculation. The ADE7754 provides different solutions to measure Active and Apparent Energy from the six analog inputs thus enabling the use of the ADE7754 in various Power meter services as 3-phase 4-wire, 3-phase 3-wire but also 4-wire delta. In addition to RMS calculation, Real and Apparent power informations, the ADE7754 provides system calibration features for each phase, i.e., channel offset correction, phase calibration and power calibration. The CF logic output gives instantaneous real power information. The ADE7754 has a waveform sample register which enables access to ADC outputs. The part also incorporates a detection circuit for short duration low or high voltage variations. The voltage threshold levels and the duration (no. of half line cycles) of the variation are user programmable.