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445 articles for “expression”
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Modeling of Transformer Windings having Non-uniform Inductance Distribution
Abstract: A direct analytical procedure for analyzing power transformer windings with location-dependent series inductance is presented. This dependence is typically introduced in order to take the inter-turn mutual inductive coupling into consideration. The paper addresses the frequency domain analysis conducted in the complex s- or the jω-domains. Results for the frequency-dependent winding’s input impedance with different treatments of the transformer’s neutral point will be available. The frequency characteristics including the resonance …
Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 3, 2014 · pp. 12–25 Read article
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Circuit Breakers’ Recovery Voltage Transients: Impact of Composite Loads and Power Network’s Configuration
Abstract: The paper addresses the identification of the circuit breaker transient recovery voltage and its dependence on the loading conditions and the data of the power network, such as its rated power frequency and short-circuit level. A Laplace-domain approach is adopted and a closed-form expression for the recovery voltage is derived. A numerical inversion technique using Mathematica is implemented in order to get its time waveform. The proposed technique is applied …
Published in Journal of Power Electronics and Power Systems · Vol. 11, Issue 2, 2021 · pp. 18–26 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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Calculation Method for Determining the Gas Flow Rate Needed for Liquid Removal from the Bottom of the Wellbore
Abstract: As a result of flooding and accumulations of liquid at the bottomholes, the operating conditions of gas wells become complicated, so that they end up self-squeezing and losing of gas production. A method is proposed for determining the technological parameters of operation of the gas wells with the purpose of removing liquid from the bottom of the wells. Data from the gas dynamics and special studies were used to develop …
Published in Journal of Petroleum Engineering & Technology · Vol. 11, Issue 2, 2021 · pp. 1–8 Read article
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Evaluation of the Effects of Total Suspended Solid and Total Hardness in Crude Oil Contaminated Water Environment
Abstract: The actions and effects of a few selected physiochemical traits present in a contaminated water environment were examined in this study attempt using experimental methods and mathematical expressions. Throughout the course of 84 days at 14-day intervals, six control valves were established at equal intervals down the depth of the tanks to collect samples for study of physicochemical characteristics, total bacterial counts (TBC), and total petroleum hydrocarbon (TPH) content. The …
Published in Journal of Petroleum Engineering & Technology · Vol. 13, Issue 2, 2023 · pp. 35–46 Read article
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Novel Characteristics of GaN based Nanoelectronic Double-Heterojunction HEMTs to Establish a Solid-State-Electronics Laboratory
Abstract: The drain characteristics are investigated with respect to electrical variables (drain voltage, gate voltage) and structural parameters of high electron mobility transistors (HEMTs). Total 10526 individual simulation-outputs are reported in this work. The maximum drain current of 553 mA is achieved by the simulated structures of double-heterojunction HEMTs using the SILVACO-ATLAS software tool. The drain current is higher at shorter gate length. The drain current is higher at larger aluminium …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 3, 2017 · pp. 11–20 Read article
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T-π Network Simulation and Thevenin- Norton Equivalent Circuit Values From Laplace Description Using Pspice Software
Abstract: From the conversion methods of T-π (star-delta) for impedances circuits, the behavioral modeling of Pspice simulation program is used to obtain equivalent circuits using LAPLACE option. The conversions are verified for two types of circuits by obtaining AC values of voltages and currents at various nodes and branches using Pspice computer simulations. There are many ways of expressing Thevenin/Norton equivalent circuit parameters such as (a) as real numbers for pure …
Published in Journal of Semiconductor Devices and Circuits · Vol. 9, Issue 2, 2022 · pp. 43–58 Read article
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Axial Load Carrying Capacity of RCC Column Jacketed with Steel Angels and Steel Strips
Abstract: An The Purpose of this research is to study & analyze the existing structures of Factory shed which is almost 32 years old which is deteriorated and not in working from 20 years. Due to non-working condition of factory shed, steel truss and other structural parts are not maintained time to time as results the structural members are corroded and RCC members are deteriorated. Hence the existing column is retrofitted …
Published in Journal of Structural Engineering and Management · Vol. 10, Issue 2, 2023 · pp. 1–12 Read article
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Experimental Investigation of Dilution Control Using Advanced Gas Metal Arc Welding Process
Abstract: This work investigates the amount of reduction in dilution by using Advanced Gas Metal Arc Welding (AGMAW) process. Dilution is the ratio of area of the base metal melted to the total area of weld bead measured across a given weld bead cross section. Dilution is one of the most important factors governing the success of any surfacing operation and is expressed in percentage. The AGMAW is a self-coined word …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 1, Issue 3, 2014 · pp. 1–7 Read article
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Optimization Study by Response Surface Methodology and Artificial Neural Network on the Culture Parameters of Citric Acid Bioproduction from Sweet Potato Peels
Abstract: In the cause of this research work, two steps enzymatic hydrolysis of sweet potato peel was carried out respectively. The effect of α-amylase dose, reaction time, and reaction temperature and biomass weight on glucose concentration was investigated carefully. The response surface methodology (REM) predicted the highest reducing sugar concentration at liquefaction to be 74 g/L, at the following optimized conditions; temperature of 45°C, α-amylase dose 0.7 %v/v, biomass weight 22.345 …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 9, Issue 1, 2022 · pp. 30–38 Read article
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Design, Verification and Circuit Level Implementation of a Ballistic MOSFET
Abstract: A drain current expression is obtained for a nanoscale ballistic MOSFET within the framework of Landauer-Buttiker formalism considering intrinsic silicon channel at low temperature. The model drain current is compared with the numerical simulations of near ballistic nanoMOSFET structure. There is a reasonable agreement between the model and the numerical simulation results. This demonstrates the remarkably low value of the subthreshold slope of ballistic nanoMOSFET. Further, the design structure is …
Published in Journal of VLSI Design Tools and Technology · Vol. 8, Issue 3, 2018 · pp. 15–22 Read article
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Review of Design and Implementation of Adder with Increasing Bits by Using Constant Delay Logic Style
Abstract: A different logic style including the constant logic style is proposed in this paper which is helpful in increasing the high speed applications. It is suitable for implementing the complicated arithmetic expressions. The objective of this paper is to reduce the delay, noised margin and power consumption. The transistor for minimal power delay product and energy delay product is proposed in this paper. The design and implementation of adder in …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 2, 2015 · pp. 38–41 Read article
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Leveraging cross-coupled domino logic for low-power, two-port SRAM with resilience to Differential Power Analysis (DPA) attacks
Abstract: Side channel attacks have become a serious threat to embedded and cryptographic systems. These attacks can be deployed by capturing the power consumption traces or electromagnetic radiations from the power and communication channels. SRAM is vulnerable to such attacks. Power consumed by SRAM for various read and write operations can express the information about bits being read from or written into the bit-cells which eventually exposes the instructions and data …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 1, 2021 · pp. 8–16 Read article
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Quantum Behavior of Charge Carriers in a Symmetrical Double Gate MOSFET
Abstract: Our earlier work on modeling of single gate n-channel metal oxide semiconductor field effect transistor (MOSFET) has been extended to discuss the quantum behavior of charge carriers in symmetrical double gate (DG) MOSFET. The potential profile in the channel region of DG MOSFET has been obtained in parabolic approximation. The parabolic potential facilitates analytical expression for electric field. The appropriate Schrodinger’s equation has been solved to obtain wave functions in …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 1, 2021 · pp. 17–28 Read article
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Transient Analysis of Electronic Circuits Including Zener Diodes
Abstract: This paper addresses the transient analysis of the electronic circuits incorporating Zener diodes. It starts with suggesting a new Zener diode model. The model is based on efficiently utilized step functions of the applied voltage. It includes also the diode’s main technical parameters such as its resistances in both the forward and reverse current directions as well as its Zener’s breakdown voltage. The sharp discontinuities of the step-functions are dealt …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 3, 2021 · pp. 1–9 Read article
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River Science Research: Multidisciplinary To Trans Disciplinary
Abstract: We are in the decay where water is important as well as complex concern of our day to day life. River is the main source of surface water. It’s merely essential to figure out the issues that will affect the river changes for successful river management. Due to enormously uncertain spatial; temporal multidimensional characteristic of river change it’s very difficult to give exact theoretical concept to address this issue. There …
Published in Journal of Water Resource Engineering and Management · Vol. 1, Issue 1, 2014 · pp. 15–19 Read article
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Modeling and Simulation to Monitor Dissolved Nitrogen Depositions in Eleme Streams, River State
Abstract: This paper monitor the dissolved nitrogen deposition in stream, the study observed high rate of nitrogen content in the stream, the result from physiochemical analysis shows the rate and variation of nitrogen concentration, this pollution content were monitored applying modeling and simulation, the predictive values were generated from different stations, the result shows decreasing rate of dissolved nitrogen from all the stations, the results expresses in every points of observation …
Published in Journal of Water Resource Engineering and Management · Vol. 7, Issue 2, 2020 · pp. 23–37 Read article
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Integrating Respondents’ Knowledge in the Moheshkhali Island MSP: A Framework for Sustainable Management Planning
Abstract: Across the globe, efforts are underway to establish comprehensive plans for oceanic regions, aimed at fostering sustainable governance and management of these vital environments. One such approach gaining prominence is marine spatial planning (MSP), which aims to systematically arrange the utilization of ocean space and resources as well as facilitate harmonious interactions among various human activities. This method is increasingly being embraced as an integral tool in the realm of …
Published in Journal of Water Resource Engineering and Management · Vol. 10, Issue 2, 2023 · pp. 11–24 Read article
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PREDICTING THE BEHAVIOUR OF BORRELIA IN HOMOGENEOUS FINE SAND IN COASTAL AREA OF BAKANA
Abstract: AbstractThe deposition of borrelia in fine sand formation in the coastal area of Bakana was monitored applying modeling and validation, the study try to predict the migration process of borrelia in the coastal formation, such deltaic depositions were observed to be alluvia predominant thus maintained homogenous fine sand formations. The study monitor the transport of borrelia in coastal area to observed whether the homogeneity will affect the behaviour of borrelia …
Published in Recent Trends in Civil Engineering & Technology · Vol. 8, Issue 2, 2018 · pp. 11–19 Read article
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FLEXURAL STRENGTHENING OF PCC BEAMS WITH VARYING FIBER DENSITIES OF CARBON FIBER FABRICS
Abstract: Strengthening of concrete structures has become ineludible due to unavoidable factors such as fatigue and aggressive environmental conditions causing deterioration of concrete structures. Many researchers are turning their direction for use of various high strength and high performance concretes due to their high structural and durability properties, for the purpose of repair and strengthening of concrete structures against these aggressive conditions. One of the rehabilitation methods was used in this …
Published in Recent Trends in Civil Engineering & Technology · Vol. 8, Issue 3, 2018 · pp. 14–20 Read article