<abstract xmlns="http://www.w3.org/1999/xhtml">

The aim of this paper is to present a system capable of modifying the human voice: volume by direct amplification/attenuation, duration of the voice signal and pitch using the Phase Vocoder, and timbre with the help of cepstral analysis. The system is also able to dynamically modify the aforementioned parameters in real-time. The proposed system was evaluated using a set of “clean” speech samples from the LibriSpeech ASR corpus of English speech with the Perceptual Evaluation of Speech Quality (PESQ) standard.
</abstract>

Faculty of Engineering, Department of Computer Science and Electrical Engineering

Dynamic Voice Parameter Modifications in Speech Signals

<abstract xmlns="http://www.w3.org/1999/xhtml">

The paper presents the particularities of wire electric discharge machining (WEDM) regarding electrode tool vibration (wire tool vibration). It shows how the electrode tool vibrates and the vibration shape. The presented mathematical model can be successfully used in practice to improve the accuracy of processing through the wire electric discharge machining.
</abstract>

Faculty of Engineering / Department of Industrial Engineering and Management

Particularities of Wire Electrode Vibrations on WEDM

<abstract xmlns="http://www.w3.org/1999/xhtml">

Under discussion is the matter of processing hyperboloid surfaces using wire electrode discharge machining (WEDM). Let us consider a random hyperboloid surface which will help define the kinetics engaged in generating it. There will be illustrated the mathematical relations that make possible the engendering of hyperboloid surfaces, ensued by an exemplification of the way the processing works, highlighting its industrial role.
</abstract>

Professor Ph.D., Faculty of Engineering / Department of Industrial Engineering and Management

Assistant professor Ph.D., Faculty of Engineering / Department of Industrial Engineering and Management

About WEDM Processing of Hyperboloid Surfaces

<abstract xmlns="http://www.w3.org/1999/xhtml">

Since the beginning of the Covid-19 pandemic, carrying out of practical applications, it has been a challenge for technical higher education. Several technical disciplines, such as the strength of materials, requires students to access the laboratories and perform specific tests. Among these, the photoelasticity method is established for determination of the isocline and isochromatic families of curves. The method involves the analyze of an optically transparent, homogeneous and isotropic material, in an unsolicited state, through polarized light. This requires that the test specimen to be fixed into the polariscope, which implies the physical access of the students into the laboratory. The result obtained, as an image, is often blurred or hard to interpret. On the other hand, the determination of the above-mentioned families of curve by the finite element method (FEM) may be carried out remotely on any PC on which a specific finite element analysis program is installed, if the result of a tensile test on an identical specimen in shape and dimensions, as that one used for photoelasticity is transmitted to the users. In addition to the advantage of remote work, which can be overseen on a platform such as Microsoft Teams or Google Meat, once the analysis with the finite elements is completed, several additional results are available. In this paper, the authors aim to present the usefulness of using the finite elements method (FEM) as opposed to the photoelasticity method, especially under the circumstances of the Covid-19 pandemic. Also, at the end of the paper, a comparative table is presented containing the results that can be obtained by the two methods.
</abstract>

Advantages of using the Finite Elements Method in Stress Analysis and Isostatic Curves, as Opposed to the Photoelasticity Method, in E-Learning

<abstract xmlns="http://www.w3.org/1999/xhtml">

In this paper, an open-loop speed estimation algorithm is proposed for an induction machine. The model used is based on the monitoring of stator voltages and currents, specific to a three-phase induction machine (TPIM) with known parameters. The performances of the proposed model will be tested on the MATLAB / Simulink simulation environment,[11] where it is observed that the open-loop speed estimator depends on the variation of the induction machine parameters. In order to improve the operating performance of the induction machine, this paper also uses a rotor flux estimator. Thus, the results obtained in this case will be verified on the used simulation environment.
</abstract>

High-Performance Electrical System with Three-Phase Induction Machine

<abstract xmlns="http://www.w3.org/1999/xhtml">

The SPIF is a promising procedure in achieving unique and small series production. The paper’s aim is to present a succinct review of the latest research of the SPIF of polymers regarding process parameters and failure mechanisms. There are also presented some considerations regarding costs and energy consumption and the differences between SPIF of polymers and metallic materials.
</abstract>

A Succint Review of Single Point Incremental Forming of Polymers

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Volume 75 (2023): Issue 1 (December 2023)

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Acta Universitatis Cibiniensis. Technical Series

 Publishing House and Owner: Lucian Blaga University of Sibiu, Romania  Acta Universitatis Cibiniensis - Technical Series provides an excellent support for the dissemination of the scientific research results conducted by professors, PhD students and other researchers.  Acta Universitatis Cibiniensis was first published in 1997. It first started as a scientific bulletin written in Romanian language and since 1998 submitted papers have been accepted other languages: English, French or German.  Since 2003, after reassessment by CNCSIS, Acta Universitatis Cibiniensis appears as Technical Series, ISSN 1583-7149, with an annual English volume.  In 2014 the first online volume was published by the academic publisher De Gruyter with the ISSN 2668-6449. Since than, Acta Universitatis Cibiniensis Technical Series volumes are available online and a new volume is added annually.  The main subjects covered by the scientific bulletin during its publishing history were:   Advanced Manufacturing Technologies  Mechanical Engineering, Mechatronics and Robotics  Computer Science and Automation  Materials Science and Technology  Academic Education and Management   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 