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Data-Based Technique for Extracting Knowledge from Data Generated in Experiments

ZAPOROJAN, Sergiu; CARBUNE, Viorel; CALMICOV, Igori (IEEE, 2020)

Fuzzy sets are used in different fields and determination of the membership functions is one of the most important issues in the design of fuzzy systems. The paper presents an approach to that problem to provide solutions ...

Assisting drivers during overtaking using Car-2-Car communication and multi-agent systems

CARA, Calin; GROZA, Adrian; ZAPOROJAN, Sergiu; CALMICOV, Igor (IEEE, 2016)

A warning system for assisting drivers during overtaking maneuvers is proposed. The system relies on Car-2-Car communication technologies and multi-agent systems. A protocol for safety overtaking is proposed based on ACL ...

Assessment of influence of systematic errors on the precision with which the normalized frequency of a sinusoidal signal is determined by means of a discrete fourier transformation with interpolation

BELEGA, D.; ZAPOROJAN, S. (Springer Nature Switzerland, 2009)

The influence of systematic errors caused by the infleunce of the imaginary part in the spectrum of a sinusoidal signal on the estimator of its normalized frequency is analyzed by means of a discrete Fourier transformation ...

A Second Order-Cone Programming Relaxation for Facility Location Problem

MORARU, Vasile; ZAPOROJAN, Sergiu; GROZA, Adrian (IEEE, 2014)

In this paper we discuss the numerical solving of one of the well known problems related to the production systems. Namely, it is about facility location problem, which is reformulated in terms of non-convex minimization ...

A Second Order-Cone Programming Formulation for Simple Assembly Line Balancing Problem

MORARU, Vasile; ZAPOROJAN, Sergiu (Lucian Blaga University Press, Sibiu, 2013)

Decision support in order to assure an optimal business in the framework of a industrial company is based on some mathematical models, including optimization. The paper discusses the numerical solving of a task known as a ...

A model of programmable processors

ZAPOROJAN, Sergiu (Universitatea Politehnica, Bucureşti, 1997)

Designers of electronic systems use more and more programmable processors in their systems. The programmability of processing units is considered as an efficient approach to support the increasing requirement on the functions ...

A formal approach for identifying assurance deficits in unmanned aerial vehicle software

GROZA, Adrian; LETIA, Ioan Alfred; GORON, Anca; ZAPOROJAN, Sergiu (Springer Nature Switzerland, 2015)

While formal methods have proved to be unfeasible for large scale systems, argument-based safety cases offer a plausible alternative basis for certification of critical software. Our proposed method for increasing safety ...

A continuous reformulation of the quadratic unconstrained binary optimization problem

MORARU, Vasile; ZAPOROJAN, Sergiu (“Lucian Blaga” University, 2015)

In this paper we consider the Quadratic Unconstrained Binary Optimization (QUBO) Problem. Using a suitable function and penalty parameter we can reformulate the original QUBO problem as a continuous program. It is shown ...

The geometry of fractional tangent bundle and applications

ALBU, Ion Doru; OPRIŞ, Dumitru (Geometry Balkan Press, 2009)

The authors present the use of the revised fractional Riemann-Liouville derivative in the fractional tangent bundle of order k, TM ak, of a differential manifold M and the behavior of some objects under a change of local ...

The geometry of fractional osculator bundle of higher order and applications

ALBU, Ion Doru; NEAMŢU, Mihaela; OPRIŞ, Dumitru (Cornell University, 2007)

Using the reviewed Riemann-Liouville fractional derivative we define the bundle Eak= Oscak(M) and highlight geometrical structures with a geometrical character. Also, we introduce the fractional osculator Lagrange space ...

The dynamical rigid body with memory

ALBU, Ion Doru; NEAMŢU, Mihaela; OPRIŞ, Dumitru (Cornell University, 2007)

In the present paper we describe the dynamics of the revised rigid body, the dynamics of the rigid body with distributed delays and the dynamics of the fractional rigid body. We analyze the stationary states for given ...

Stochastic generalized fractional HP equations and applications

ALBU, I. D.; NEAMŢU, M.; OPRIŞ, D. (Cornell University, 2009)

In this paper we established the condition for a curve to satisfy stochastic generalized fractional HP (Hamilton-Pontryagin) equations. These equations are described using Itˆo integral. We have also considered the case ...

Provocări ale dezvoltării economiei a Republicii Moldova: aspecte demografice

SÂRBU, Ion; ALBU, Ion (Academia de Studii Economice din Moldova, 2013)

Sustainable economic growth of the Republic of Moldova depends on policies promoted by the governments and motivating citizens. Demographic constraints undermine the possibility of a sustainable economic growth for a long ...

On the discrete-continuous dynamical systems

OPRIS, D.; ALBU, I. D. (Universitatea “Al. I. Cuza” Iaşi, 1997)

The main idea of our study is a direct treatise of the dynamical systems of discrete-continuous type our aim is to: formulate a discrete-continuous variational principle and deduce the discrete-continuous Euler-Lagrange ...

Mathematical Model for Diamond-Type Crystals with Impurities or Defects

OPRIŞ, D.; ALBU, I. D. (Politehnica University of Bucharest, 1998)

This work develops the geometry and dynamics of diamond-type crystals with impurities or defects and symmetry from the perspective of Langrangian mechanics. We begin by formulating continuous–discret Lagnge-d`Alembert ...

Leibniz dynamics with time delay

ALBU, Ion Doru; OPRIŞ, Dumitru (Cornell University, 2005)

In this paper we show that several dynamical systems with time delay can be described as vector fields associated to smooth functions via a bracket of Leibniz structure. Some examples illustrate the theoretical considerations.

Geometrical Aspects of the Covariant Dynamics of Higher Order

OPRIŞ, D.; ALBU, I. D. (Springer Nature Switzerland, 1998)

We present some geometrical aspects of a higher-order jet bundle which is considered a suitable framework for the study of higher-order dynamics in continuous media. We generalize some results obtained by A. Vondra, [7]. ...

Euler-Poincarè-Poisson Equations for Semidirect Products and Principal Bundles

OPRIŞ, D.; ALBU, I. D. (Politehnica University of Bucharest, 1999)

A variational approach for a discrete Lagranian on a semidirect product and on principal bundle is developed.

Connexions métriquesk-plates

ALBU, I. D. (Springer Nature Switzerland, 1977)

En effet, soit/~. une connexion m~ trique de M dont la distribution horizontale est zln. La structure de trivialisation de~, pour chaque x EM, assure l'existence d'une section locale cr~: U-~ OhM, xE U. Pour n'importe quel ...

Applicability of Databases in the Real Estate Valuation Process in the Conditions of the Emerging Economy of the Republic of Moldova

ALBU, Svetlana; ALBU, Ion (Scientific Research Publishing Inc., 2021)

The real estate valuation activity in the Republic of Moldova dates from 2002, with the adoption of Law No. 989 on Evaluation Activity. Nevertheless, the legislative and methodological framework is extremely limited. There ...

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