11 research outputs found
Comparative Aspects of the Temporal Characteristics of the Production of Various Plastic Products
Plastic has a special place in the manufacture of various products. Production
of plastic products consists of several stages. Each stage has its
own time characteristics. Thus, the duration of the production of plastic
parts depends on the individual stages. A comparative analysis of the
time aspects of the formation of various plastic products showed that
the duration of the molding process is affected by the holding time under
pressure, the time of pauses
Connection of Renewable Energy Sources to the Regional Power Systems. A Short Analyze
Among the basic problems that are involved in the decision to implement
an energy project with Renewable Energy Sources(RES) are
the identification of resources and the assessment of their regional
potential, the possibilities of connecting to the existing electricity
network in the area, the efficiency of conversion of natural RES in
electricity, sources of financing and the possibilities of expanding the
regional energy system based on RES. Then there are problems of
endowing with modern RES-based power plants, the quality of the
electricity supplied in the grid, the reliability of the connection
schemes and the continuity of the power supply while reducing the
energy losses on the grids. All these problems can pose risks to prevent
the construction of a RES power plant or the good functioning
of RES connected to the regional power system. In the paper, these
aspects are analyzed by the authors in accordance with the renewable
energy resources and the existing RES on the territory of the Bihor
Count
Pre-processing of Images as a Source of Additional Information for Image of the Natural Polymer Composites
Image processing is one of the methods of analyzing and obtaining
new information. Image processing methods can be applied to any image.
Image processing is used in various fields of research. Among the
stages of image processing, the stage of image pre-processing is important.
This stage allows increasing the efficiency of the analysis of
the original image. We considered the use of pre-processing for the
analysis of natural polymer composites image. In this paper, we describe
the possibilities of automatic processing of natural polymer composites
image
Operation of Circuit Breakers: Data and Analysis
[EN] An attempt has been made for the analysis on Circuit breakers (CBs) this paper. First, the types and arcing phenomenon of Oil and SF6 Circuit breakers were briefly discussed. However, various CBs were analyzed in terms of certain outage frequencies and reliability indices to ascertain the most reliable CB. This was possible using data collected from the 33kV Transmission Company of Nigeria (TCN) New Haven, Enugu. After the analysis, Emene Industrial CB had the highest value of availability of 0.9999 and the lowest tripping report while Ezillo had the highest failure rate of 0.1032.The authors are immensely grateful for the financial support from “African Centre of Excellence (ACE-SPED) University of Nigeria, Nsukka” to enable us to achieve the research (Muncho J. Mbunwe et al., 2019-2021).Madueme, VC.; Mbunwe, MJ.; Madueme, TC.; Ahmad, MA.; Anghel Drugarin, CV. (2021). Operation of Circuit Breakers: Data and Analysis. Multidisciplinary Journal for Education, Social and Technological Sciences. 8(2):60-73. https://doi.org/10.4995/muse.2021.12406OJS607382Anyaka, B.O. (2012). Reliability and Maintainability of Power System [Lecture Note]. http://engineering.unn.edu.ngCircuit globe, (n.d.). Circuit breaker, Retrieved June 10, 2017, from open source:- http://circuitglobe.com/circuit-breaker.htmlElectrical concepts, Circuit breaker and Arc Phenomenon, (n.d.). Retrieved June 10, 2017, from open source: http://electricalbaba.com/circuit-breaker-and-arc-phenomenon/Electrical Systems, (n.d.). Retrieved June 10, 2017, from open source: http://skm-eleksys.com/2012/02/sf6-circuit-breaker-working.htmlKezunovic, M. Ren, Z. Latisko, G. Sevcik, D.R. Lucey, J.S. Cook, W.E. and Koch, E.A. (2005). Automated Monitoring and Analysis of Circuit Breaker Operation, IEEE Transactions on Power Delivery, 20(3), p. 1910. https://doi.org/10.1109/TPWRD.2005.848466Pinnekamp, F. (2007). The circuit breaker: a showcase of industrial product development, Transmission group R&D and technology, ABB, Switzerland, p.31. https://new.abb.com/docs/default-source/technology/brosch%C3%BCre-chchrc2017final-einseitig-(002).pdf?sfvrsn=e3f37d14_2Saxena, S. Singh, A. Ali, M. Gandhi, K. (2012). Various Types of Circuit Breakers used in Power System for Smooth Working of the Transmission Line, MIT International Journal of Electrical and Instrumentation Engineering, 2(2), p. 106. https://www.semanticscholar.org/paper/06918326da2b2ac6fd80620d88961b68554b72edSuwanasri, T. Hlaing, M.T. and Suwanasri, C. (2014). Failure Rate Analysis of Power Circuit Breaker in High Voltage Substation, GMSARN International Journal, 8(1), 1-6. http://gmsarnjournal.com/home/journal-vol/journal-vol-8-no-1/Transmission Company of Nigeria. (2016). Tripping reports April - June 2016 [Unpublished Raw data]. New Haven, Enugu, Nigeria. https://www.tcn.org.ng/page_history.phpMuncho J. Mbunwe, M. Ayaz Ahmad, Syed Khalid Mustafa. (2020). An effective energy saving design strategy to maximize the use of electricity, J. Math. Comput. Sci., 10(5), 1808-1833, https://doi.org/10.28919/jmcs/4775Mbunwe Muncho J., Ezema Ejiofor E., Ngwu Anene A., C V Anghel Drugarin, M. Rehan Ajmal, M Ayaz Ahmad. (2021). Characterization of three phase solid state VAR compensation scheme in three phase pulse width modulation voltage source inverter, Journal of Physics: Conference Series, Vol. 1781, 012034, https://doi.org/10.1088/1742-6596/1781/1/012034M. Ayaz Ahmad, Irina Tvoroshenko, Jalal Hasan Baker, Vyacheslav Lyashenko. (2019). Modeling the Structure of Intellectual Means of Decision-Making Using a System Oriented NFO Approach, International Journal of Emerging Trends in Engineering Research , Vol. 7(11), 460-465. https://doi.org/10.30534/ijeter/2019/107112019Mykhailo Kopot, M. Ayaz Ahmad, Vyacheslav Lyashenko, Syed Khalid Mustafa. (2020). Prospects for Creating Sub-Millimeter Magnetrons, International Journal of Advanced Trends in Computer Science and Engineering, Vol. 9(4), 6184-6188. https://doi.org/10.30534/ijatcse/2020/294942020M. Ayaz Ahmad, Irina Tvoroshenko, Jalal Hasan Baker, Vyacheslav Lyashenko. (2019). Computational Complexity of the Accessory Function Setting Mechanism in Fuzzy Intellectual Systems, International Journal of Advanced Trends in Computer Science and Engineering, Vol. 8(5), 2370-2377. https://doi.org/10.30534/ijatcse/2019/77852019Muncho J. Mbunwe, Udochukwu B. Akuru, Hilary U. Ezea, Ogbonnaya I. Okoro, M. Ayaz Ahmad. (2020). Some Aspects of Future Energy Generation in Using of Solar Power Satellites, Int. J. Anal. Appl., 18 (1), 117-128. https://doi.org/10.28924/2291-8639-18-2020-11
Computer-Aided Manufacturing of 3D Workpieces
Computer-Aided Manufacturing (CAM) assumes to use dedicated software
for controlling machine tools and similar devices in the process of
workpieces manufacturing. CAM is, in fact, an application technology
that uses computer software and machinery to simplify and automate
manufacturing processes. CAM is the inheritor of computer-aided engineering
(CAE) and is often used conjunctively with computer-aided design
(CAD). Advanced CAM solutions are forthcoming and have a large
coverage, from discrete systems to multi-CAD 3D domain. CAM does
not supersede the necessity of human factor intervention, as production
engineers, programmers or operators, but intercedes the knowledge
of experimented manufacturing engineers by using performant
devices, while enhancing the competences of new professionals by
having access to latest modern equipment. CAM runs along with CNC
machines. The purpose of CAM-CNC system is to reduce as much as
possible the intervention of human factor, thus reducing human error.
The present paper follows to highlight the advantages of CAM-CNC system
on a 3D workpiece manufacturing
Issues of Semi-automatic Air Processing using a DCS System
It’s well known that trends worldwide are towards automation. We look
for having automatic, or worst case semi-automatic, processes, systems,
machines, with the purpose to produce a finished good in the
shortest time. Consider we have a semi-automatic system used to obtain
air separation. The entire system is ‘supervised’ by a so called DCS
(Distributed Control System) with the role to command several vanes
with different functions. Human factor interferes with DCS only for digital
data input. The system converts digital information in analogical
signals in order to control pressure or flow. The issues of interest addressed
in the present paper concern losses and gains brought by automation
for this particular case of study
Optimal Encoding of Data in Data Transmission Channels
This paper aims to present the methods of achieving an optimal encoding in the data communication channels. After a short description of the communication channel and of the data communication channel types, follow briefly a few notions of the data channel enthropy, information, transinformation, with their properties, definitions and mathematical relations connecting them. Chapter 2 presents the concept of optimal code, following a detailed description (using two suggestive examples) of the two main methods used to obtain an optimal code: Shannon-Fano and Huffman
Team Viewer Technology for Remote Control of a Computer
Team Viewer software is used to remote control our PC. We can use
this remote control technology to desktop sharing, online conferences
and for file transfer between computers. Basically, using this software,
you can ask for help a friend, or professional software to solve problems
from a distance, without it having to be physically go to each client
/ friend in part. After installed and configured Team Viewer
application, is complete, we can remote control the computer
Study of Energy Losses in High-Voltage Induction Motor Electric Drive
The dynamic behavior during operation of the high-voltage induction
motor electric drive has been studied by means of mathematical model
developed. The purpose is to draw out more clearly picture of
operation of high-voltage induction motor drives. The system of
differential equations has been transformed and solved using suitable
software. As a result the values of the energy losses components in the
induction motor have been obtained according to different values of
supply voltage and factor of inertia. Some of the study results have
been presented graphically. An analysis has been made and
conclusions from the results obtained have been done