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226 articles for “Variance”
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Defining Regression Polynomials with Process Similarity Criteria
Abstract: Highly accurate monitoring and prediction is essential in detecting abnormality events and forecasting demands in supply chains. This investigation provides a computational procedure for defining polynomials that satisfy similarity criteria in the monitoring process for a polynomial of any degree. It provides an example of using algorithms to predict transient thermal processes in electronic devices. The second-degree polynomial defined with this algorithm is compared with a polynomial defined using a …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 10, Issue 2, 2023 · pp. 13–20 Read article
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A Comprehensive Investigation of Bagging-Based Ensemble Methods for Improving Machine Learning Model Robustness
Abstract: Machine learning models such as Decision Trees, Logistic Regression, and K-Nearest Neighbors are widely used for classification tasks due to their simplicity and interpretability. However, these models often suffer from high variance, overfitting, and poor generalization when applied to real-world datasets, particularly those that are small, noisy, or imbalanced, as commonly encountered in healthcare, finance, and cybersecurity applications. To address these limitations, this research proposes a Bagging (Bootstrap Aggregating)-based ensemble …
Published in Recent Trends in Mathematics · Vol. 3, Issue 2, 2026 · pp. 24–34 Read article
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Jitter Estimation in Voice
Abstract: Jitter is present in brisk perturbations of the vocal cycle lengths and when they are sampled at least at the rate of fundamental frequency they can be observed from one cycle to the next .Voice quality estimation can be done by analyzing jitter since it provides a high association with voice disorders. It also explains the variance of pitch keeps in the allowance of just noticeable difference, which can be …
Published in Current Trends in Signal Processing · Vol. 4, Issue 1, 2014 · pp. 17–20 Read article
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Heteroscedasticity in Survey Data and Model Selection based on Weighted Schwarz-Bayesian Information Criterion
Abstract: AbstractThis paper proposed Weighted Schwarz Bayesian Information criterion for the purpose of selecting a best model from various competing models, when heteroscedasticity is present in the survey data. The authors found that the information loss between the true model and fitted models are equally weighted, instead of giving unequal weights. The computation of weights purely depends on the differential entropy of each sample observation and traditional Schwarz Bayesian information criterion …
Published in Research & Reviews : Journal of Statistics · Vol. 2, Issue 3, 2013 · pp. 8–23 Read article
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Enhancing Machinability in the Heat Treatment of Inconel 718: A Comprehensive Review
Abstract: The increasing need for materials with high strength and heat resistance, particularly in aerospace applications, creates machining issues. These materials are generally difficult to machine because to their strong wear resistance, abrasion resistance, and low heat conductivity. This produces strong cutting forces and temperatures, resulting in a limited tool life. variances in the microstructures of various materials can induce variations in machinability due to variances in chemical composition, casting, forging …
Published in International Journal of Energy and Thermal Applications · Vol. 2, Issue 1, 2024 · pp. 9–20 Read article
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Design and Implementation of an IoT-Based Power Theft Detection System Using Sensor Networks
Abstract: With the increasing demand for efficient energy distribution and consumption monitoring in smart grid systems, the need for robust power theft detection mechanisms becomes paramount. This project proposes an IoT-based solution utilizing energy metering to detect instances of power theft within different segments of the distribution network. The system employs three types of energy meters: Distribution Point (DP), Pole, and Domestic meters. Every meter is positioned thoughtfully to track the …
Published in Journal of Semiconductor Devices and Circuits · Vol. 11, Issue 2, 2024 Read article
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Assessment of Water Quality along River Ethiope, Delta State
Abstract: The environment, economic growth, and human health all depend on the quantity and quality of water supplies. Given this, the significance of water quality monitoring cannot be overstated.This study was aimed at assessing the water quality of River Ethiope. To achieve this, surface water samples were collected from Ethiope River along its banks at the following towns; Umuaja (SWI), Ebedie (SW2), Abraka (SW3), Sapele (SW4) and Ughara (SW5) axis during …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 16, Issue 2, 2025 · pp. 8–16 Read article
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A study on Parametric and Non-Parametric Statistical Tools
Abstract: This research report provides a brief overview of the most recent research techniques. The field of the research process has seen a resurgence of attention due to recent advancements in academia. Professors, Ph.D. candidates, researchers, investigative officers, and university students comprise the demographic of this research article. The article will become an essential part of your research papers, projects, and reports for citations due to future obligations. This study is …
Published in Journal of Production Research & Management · Vol. 16, Issue 1, 2026 · pp. 10–31 Read article
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Analysis of Cost and Schedule Performance of Residential Building Projects by EVM Technique
Abstract: Earned value management (EVM) is a project control technique which provides a quantitative measure of work performance by cost and schedule monitoring. It involves a crediting (earning) of budget as scheduled work is performed. The EVM technique is a proven method to evaluate work progress in order to identify schedule slippage and areas of budget overruns. Value earned for a given task is computed as budgeted cost of work performed …
Published in Journal of Construction Engineering, Technology & Management · Vol. 4, Issue 1, 2014 · pp. 1–7 Read article
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Noise Analysis of Single-Ended Input Differential Amplifier (MOS) using Stochastic Differential Equation
Abstract: AbstractIn this paper, we do the noise analysis of single-ended input differential amplifier (MOS). Stochastic differential equations are used to analyse the effect of extrinsic noise. We use time domain method and use SDE (Stochastic Differential Equation) to determine autocorrelation function for the output process. Mean and variance of the output noise is obtained. This analysis helps to get circuit with better noise performance. The analysis compares the noise performance …
Published in Journal of Microwave Engineering and Technologies · Vol. 4, Issue 3, 2017 · pp. 19–25 Read article
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Stochastic Differential Equation Noise Analysis of Common-Gate Amplifier with Capacitive Load
Abstract: In this paper, common-gate amplifier with capacitive load is analysed to observe the effect of noise on the circuit. We used stochastic differential equations to analyse the effect of extrinsic noise. We adopted time domain approach and used SDE to obtain autocorrelation function for the output voltage. We determined mean and variance of the output noise. This analysis leads to obtain the circuit with better noise performance. Keywords: Common-gate amplifier, …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 1, 2018 · pp. 1–4 Read article
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Optimization of Machining Parameters on End Milling of EN 8 Back Shaft for Power Press
Abstract: The most of the industries carried out various machining processes are the heart of any industries. The processes are advanced day by day in order to achieve goal of efficiency. The paper state about one of the process namely end milling on experimentally investigates the effect of input parameters on material removal rate and surface roughness for key way cut on particular back shaft. Design of experiment carried out by …
Published in Trends in Mechanical Engineering & Technology · Vol. 8, Issue 3, 2018 · pp. 49–58 Read article
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Performance Evaluation of Desi and Kabuli Type Chickpea Varieties at Hulbareg District Southern Ethiopia
Abstract: Chickpea (Cicer arietinum L.) is the third most important pulse crop and one of the major highland pulse crop widely grown in Ethiopia. They are two types of chickpea, called desi and kabuli. This study was conducted on Hulbareg district of Southern Ethiopia at 2020 cropping season. The field experiment was arranged a randomized complete block design with three replications to evaluate and select desi and kabuli type chickpea varieties …
Published in Research and Reviews : Journal of Crop science and Technology · Vol. 11, Issue 2, 2022 · pp. 22–28 Read article
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Tail Reoriented Systematic Sampling Scheme for Finite Population
Abstract: This study discusses about a new sampling scheme in the systematic setup for estimation of the population mean. The expression for the variance of the sample mean is derived and a comparative study is with the variance of the sample mean of simple random sampling (without replacement), linear systematic sampling and stratified sampling in the presence of linear trend, two-way linear trend and trend of the form
Published in Research & Reviews : Journal of Statistics · Vol. 7, Issue 3, 2018 · pp. 68–74 Read article
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Zigzag Systematic Sampling Scheme For Finite Population
Abstract: In the present study, a new sampling scheme is proposed in the systematic setup for estimation of the population mean. The explicit expressions for variance of the sample mean are obtained and compared with the variance of the sample mean of Simple Random Sampling (without replacement) and Linear Systematic Sampling in the presence of a linear trend, two way linear trend and trend of the form . Keywords: Zigzag systematic …
Published in Research & Reviews : Journal of Statistics · Vol. 7, Issue 3, 2018 · pp. 91–107 Read article
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A Novel Clustering Techniques Evaluation using Monte Carlo Simulation
Abstract: In Machine Learning clustering is one the most significant method. Today, we have data in rich from many sources but in order to get meaningful information from it is very boring task. Machine learning clustering algorithms to create cluster to decode the meaningful information from the data, this analysis approach has gained much popularity in recent years. This paper explores evaluation performance of frequently used existing clustering techniques such as …
Published in Research & Reviews : Journal of Statistics · Vol. 10, Issue 3, 2021 · pp. 1–23 Read article
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An Approach on Optimization of Thermo Physical Properties of Teak Wood Dust Filled Polymeric Composites
Abstract: The aim of the present work was to prepare the specimens with the help of hand-lay-up technique to measure the thermal properties of TWDPC. The density & voids of TWDPC were measured to determine its physical property & significantly affected some of its mechanical properties. Taguchi experimental method was applied to optimize its thermal properties. The optimal factor combinations were determined with the help of ANOM & the analysis of …
Published in Journal of Polymer & Composites · pp. 67–80 Read article
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Suitability of Additive Manufacturing Process in Optical Lens Production
Abstract: Additive Manufacturing is one of the non-conventional methods of manufacturing that is gaining immense popularity for its ease to manufacture customized parts. The lenses have always been manufactured using a continuous process of Blanking, Surface generation, Edging and Centering, Grinding, Polishing, and Coating. But the conventional processes demand large inventories and more time. Customization of lenses may also be possible if a process like Additive Manufacturing is implemented. Also, the …
Published in Trends in Mechanical Engineering & Technology Read article
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Assessing the Knowledge and Attitudes of Eligible Couples Regarding Small Family Norm in a Selected Rural Area of Gwalior
Abstract: This study aimed to determine the level of knowledge and attitude of eligible couples toward permanent family planning methods in a selected rural area of the district. The research method was an evaluation. Sixty couples were chosen at random who met the inclusion and exclusion criteria. The primary purpose of this research is to evaluate the level of understanding and satisfaction with permanent family planning methods among eligible couples in …
Published in International Journal of Community Health Nursing And Practices · Vol. 1, Issue 2, 2023 Read article
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Bioremediation of TPH in Petroleum HydrocarbonContaminated Clay Soil with an Emerging Nutrient (Solpawa SBR-X TM)
Abstract: This research focuses on the bioremediation of total petroleum hydrocarbons (TPH) in petroleum hydrocarbon contaminated clay soil with an emerging nutrient (Solpawa SBR-XTM). A laboratory experiment was set up and successfully carried out in order to monitor TPH concentration among the various reactors (T1, T2, T3, and T4). This process was monitored for 7 days, 12 days, 22 days, 32 days, 42 days, and 52 days, respectively, for reactors 1, …
Published in International Journal of Pollution: Prevention & Control · Vol. 1, Issue 1, 2023 · pp. 9–16 Read article