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1973 articles for “change” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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Single-Phase Two-Stage Multi-Level Inverter Employing Low Number of Switching Devices
Abstract: In recent years, multilevel inverter (MLI) plays a significant role in low or medium voltage applications as a result of generating voltage with reduced harmonic contents. This paper proposes a new version of multi-level inverters (MLI) with reduced switching devices along with reduced harmonics content of output voltage, which results in low switching losses compared with conventional MLI topologies. In addition, the proposed inverter provides low total blocked voltage compared …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 2, 2019 · pp. 22–32 Read article
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Area Load Frequency Control (ALFC) using Different Conventional Algorithms
Abstract: In practical system, frequency is always changing because of changing load. So, load frequency control (LFC) is necessary to maintain the frequency at an optimum level. So, in the general system, integral (I), proportional integral (PI) and proportional integral derivative (PID) controller is used for compensation of frequency. In this paper, simulation for LFC is done on two area thermal systems and also different conventional PID tuning methods for minimization …
Published in Journal of Power Electronics and Power Systems · Vol. 6, Issue 2, 2016 · pp. 1–7 Read article
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Maximum Power Tracking using PI Controller in Photovoltaic System
Abstract: Maximum power point trackers are efficient enough to enhance an efficiency of the photovoltaic system. So many methodologies have been proposed up to this date to achieve maximum power. PV modules are capable of generating maximum power under diverse atmospheric conditions. The base paper proposed an MPPT (Maximum Power Point Tracking) algorithm that based on fuzzy logic for a solar system. The solar panel is analyzed and then simulated by …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 2, 2020 · pp. 22–27 Read article
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Different Types of PWM Techniques for Single Phase Inverter: A Review
Abstract: In this paper, different types of PWM techniques and their methodology of single-phase inverter have been introduced. The PWM technique used in single phase inverter is more advantageous than conventional inverter. This paper includes the review of modern power devices such as MOSFETs, IGBTs, etc. The conventional inverter output voltage changes according to the change in load but in single phase PWM inverter gives the steady output of voltage 230 …
Published in Journal of Power Electronics and Power Systems · Vol. 12, Issue 3, 2022 · pp. 19–25 Read article
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A review of the intelligent techniques for load forecasting of UHBVNL
Abstract: The primary aim of load forecasting is to know the change in power demand with the variable factors on a short-term, medium-term, and long-term basis and to evolve our power system network according to the changing variables. It ensures correct values to the operations, stability, demand management, scheduling generating capacity, efficiency, reliability, accuracy, economy, controlling, scheduling, security analysis, environmental sustainability, etc. Various forecasting techniques are there which are making it …
Published in Journal of Power Electronics and Power Systems · Vol. 13, Issue 3, 2023 · pp. 30–38 Read article
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The Effects of Hydro Confining Pressure on the Flow Properties of Sandstone and Carbonate Rocks
Abstract: There is a significant effect of the hydro confining pressure of the core holder on the flowing properties of the formation rocks. This effect is caused due to the mechanical elastic deformation of the core when carrying out laboratory studies of the water shutoff and polymer compositions. Consequently, this deformation will cause changing in the permeability and voids storage capacity of the studied core samples. Therefore, under the laboratory conditions …
Published in Journal of Petroleum Engineering & Technology · Vol. 7, Issue 1, 2017 · pp. 44–47 Read article
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Bio Solvent EOR: Performance Assessment of Plant Extracts as Asphaltene Inhibitor
Abstract: Changes in pressure and temperature during oil production and transportation most notably during CO2 injection for enhanced recovery could lead to changes in the oil composition and deposition of asphaltene. Deposition of asphaltene near the wellbore region, production tubing and production facilities could cause severe flow assurance problem. Physical removal of asphaltene is costly and in most cases it is not preferred. A more favorable option is to prevent the …
Published in Journal of Petroleum Engineering & Technology · Vol. 5, Issue 1, 2015 · pp. 9–24 Read article
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Intelligent Wells: Reservoir Next-gen Innovation
Abstract: Intelligent wells are a game-changing tool to the oil industry, which helps us reach our goal of getting maximum oil production with minimum cost in the safest and fastest way possible. This gives us the ability to monitor and remotely be aware of the downhole condition and respond quickly to any pressing issues either expected or unexpected in the reservoir performance. It was basically introduced to deal with the water …
Published in Journal of Petroleum Engineering & Technology · Vol. 4, Issue 3, 2014 · pp. 1–8 Read article
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A New Description of Multi-phase Flow Behavior at Boundary Layers of Low-permeability Porous Media
Abstract: At present, the recovery factor of low permeability oilfield in China is only about 20%, which is enormously lower than the recovery factor index of 60% by using water-chemical flooding in medium and high permeability layer. There are a lot of causes that resulted in low recovery factor, among them that the complex pore structure, tiny throat, large pore throat ratio and non-Darcy flow in low-permeability oil layer are the …
Published in Journal of Petroleum Engineering & Technology · Vol. 3, Issue 1, 2013 · pp. 1–7 Read article
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Digital Technology and Innovation in Education
Abstract: Nowadays digital technology is totally transforming all the sectors with smart technology and intelligence capability. Among these changes, Technology is transforming education in a whole new way. The Internet is the core of providing open access to information to anybody, anywhere, anytime. Along with the internet, technology like Artificial Intelligence, machine learning, computer vision, deep learning, cloud computing, Internet of Things are changing the picture of modern education. This technology …
Published in Journal of Production Research & Management · Vol. 11, Issue 3, 2021 · pp. 13–18 Read article
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To Optimize the Efficiency of Bottle Sleeving Machine by Reducing Systematic Errors
Abstract: Bottle sleeving machines are the machines use to label and sleeving the caps to the bottle. To gain the mass production and to improve the efficiency of this machine our team decided to change the parameters and proper alignment of few parts in machine. Previously, there were several errors include like systematic errors. Firstly, we change the sensors positioning to get successive operation of sleeves to the bottle. There were …
Published in Journal of Production Research & Management · Vol. 12, Issue 2, 2022 · pp. 23–29 Read article
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Product Development Using Modular Design Structure Matrix and Quality Function Deployment
Abstract: Product development (PD) process changes with the changing market trend. Modular design plays a vital role for the product development process. In this research, design structure matrix (DSM) approach was used to group different modular parts together to obtain preeminent assembly process. It also applied quality function deployment (QFD) to compare the best product in the market. QFD itself was considered from the customer end. This research proposed the use …
Published in Journal of Production Research & Management · Vol. 5, Issue 3, 2015 · pp. 8–19 Read article
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Heuristic Based Transportation Routing and Sizing
Abstract: Employee transportation is one of the most concerned issues and a part of HR policy in today’s work culture. Optimization of these routes and analysis of scenario needs to be done to leverage cost benefits for the organizations of today. Traditional studies focus on goods delivery and pickup, but employees are a totally different entity, which change the type of problem to be solved. As the entity to be considered …
Published in Journal of Production Research & Management · Vol. 5, Issue 3, 2015 · pp. 20–27 Read article
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Experimental Study on Behaviour of RC Beam using Concrete mixed with Magnetically Treated Water
Abstract: It is expected that in the near future, the civil engineering community will have to produce structures in harmony with the concept of sustainable development through the use of high- performance materials with low environmental impact that are produced at a reasonable cost. Magnetic water used in concrete, synthesized from the normal materials used for manufacturing of concrete, provides one route towards this objective. This paper presents that the effect …
Published in Journal of Structural Engineering and Management · Vol. 3, Issue 2, 2016 · pp. 56–62 Read article
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Parametric Study of Tuned Liquid Damper on Multistorey Frame Unit
Abstract: Swimming pools in a skyscraper are not only an entertainment facility but also a boon of a structural design engineer to curb the impact of lateral forces such as wind, earthquake, etc. The usage of swimming pools as liquid tuned damper is a cost effective alternative without having any additional component within the structure. Much of the research to damp the vibration of the structure like base isolation, bracing, in-fills …
Published in Journal of Structural Engineering and Management · Vol. 3, Issue 3, 2016 · pp. 46–54 Read article
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A Comparative Seismic Assessment of Structures Utilizing Various Angles: Shear Walls vs. Diagrid Structural Systems
Abstract: The diagrid structural system has emerged as a cutting-edge approach to designing tall buildings in recent times. It represents a significant innovation in the construction industry, combining both structural strength and striking architectural aesthetics. The versatility of the diagrid system has led to its widespread adoption in the construction of tall buildings. In-depth research into the design methodology of diagrid structures has unveiled their exceptional structural capabilities and distinctive architectural …
Published in Journal of Structural Engineering and Management · Vol. 10, Issue 2, 2023 · pp. 23–30 Read article
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Application and Limitation of Metal Thermochemical Processing
Abstract: The technically intriguing and monetarily feasible technique for enhancing the surface layer of materials is surface engineering. The aim is to establish a vast scope of useable attributes that are separate from the core substrate, together with physical, chemical, electrical, electronic, magnetic, or mechanical, even though the material surface monitors the operational life throughout many implementations. The thermochemical intervention, a type of surface engineering, uses heat diffusion to incorporate non-metal …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 9, Issue 3, 2022 · pp. 25–29 Read article
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Modelling of Skin Effect in On-Chip VLSI RLC Global Interconnect
Abstract: This paper addresses one of the aspects of the high frequency effects, namely the skin effect. The basicproblem with skin effect is that it attenuates the high frequency components of a signal more than that ofthe low frequency components. Due to the increase in operating frequency and die sizes, RC models arebecoming insufficient for analysis of global VLSI interconnects. Accurate noise modelling for RLC lines isthus critical for timing and …
Published in Journal of VLSI Design Tools and Technology · Vol. 1, Issue 1-2-3, 2011 · pp. 31–44 Read article
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Major Challenges for Sustainable Water Management: A Review
Abstract: Water is a precious resource vital for all forms of life. It is ample in nature but has significant temporal and spatial variability. With increasing population, the per capita share of water on earth is decreasing, and in some regions it has reached at very low levels and where communities face water stress and water scarcity. While lack of safe drinking water is a major problem for close to a …
Published in Journal of Water Resource Engineering and Management · Vol. 4, Issue 3, 2017 · pp. 23–27 Read article
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Trend Assessment in Upper Betwa Basin of Central India
Abstract: The temporal and spatial variability of rainfall is a critical element of semi-arid atmospheres due to its severe impact water availability, livelihood and environment. The present investigation of rainfall is to examine precipitation over a long-period of time for wide region, identifying potential trends and evaluating their significance. The Betwa basin is aftermost environmental change related occasions and its possible effect on biological community, vocation, horticulture, domesticated animals and biodiversity. …
Published in Journal of Water Resource Engineering and Management · Vol. 6, Issue 2, 2019 · pp. 36–46 Read article