Mohammad Reza Mahmoudi
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View article: Comparing RSM-BBD and GEE models to optimize urban stormwater runoff treatment in dolomite-modified porous concrete
Comparing RSM-BBD and GEE models to optimize urban stormwater runoff treatment in dolomite-modified porous concrete Open
With rapid urbanization exacerbating stormwater pollution and stressing limited water resources, developing efficient and cost-effective treatment technologies to transform contaminated urban runoff into a usable water source has become a …
View article: On the spectral coherence between two discrete time harmonizable simple processes
On the spectral coherence between two discrete time harmonizable simple processes Open
View article: A Novel Geospatial Simulation Framework for Projecting Climate Dynamics
A Novel Geospatial Simulation Framework for Projecting Climate Dynamics Open
This study presents a novel geospatial approach to model, predict, and analyze climate change patterns in Iran. The methodology began with calculating the UNEP aridity index using data from 34 stations for the 1967–2024 period. Subsequentl…
View article: On the covariance estimation of the simple processes
On the covariance estimation of the simple processes Open
Simple processes are a class of spectrally correlated time series which constitutes a novel category of non-stationary time series that their Loeve bi-frequency spectrum includes a countable collection of curves. Since autocovariance funct…
View article: Distribution and abundance of microplastics in urban and industrial wastewater treatment plants in Tabriz metropolis
Distribution and abundance of microplastics in urban and industrial wastewater treatment plants in Tabriz metropolis Open
Wastewater treatment plants (WWTPs) are routes through which microplastics (MPs) enter the environment. This research assesses MP occurrence in 2 urban and 5 industrial WWTPs, in a city of 1.6 M inhabitants (Tabriz, Iran). The sampling sch…
View article: Fractional calculus in ecological systems: Bifurcation analysis and continuation techniques for discrete Lotka–Volterra models
Fractional calculus in ecological systems: Bifurcation analysis and continuation techniques for discrete Lotka–Volterra models Open
This study explores the application of fractional calculus to discrete Lotka–Volterra models, which are fundamental in ecological systems. By incorporating fractional differentiation, we capture the memory effects and long‐range dependenci…
View article: Application Methods of Zinc Sulphate Increased Safflower Seed Yield and Quality under End-Season Drought Stress
Application Methods of Zinc Sulphate Increased Safflower Seed Yield and Quality under End-Season Drought Stress Open
Zinc deficiency is one of the most widespread nutritional problems, affecting nearly one-third of the world population. In addition, it is known that zinc deficiency not only reduces crop yield but also its quality. The effect of different…
View article: Using the multiple linear regression based on the relative importance metric and data visualization models for assessing the ability of drought indices
Using the multiple linear regression based on the relative importance metric and data visualization models for assessing the ability of drought indices Open
In this study, the power of 12 of the most widely used meteorological drought indices was compared. For this purpose, the datasets of 12 stations (from 1967 to 2021) with different climatic conditions in Iran were used. For statistical ana…
View article: Using evaluated AquaCrop and Response Surface Method to determine optimum irrigation water and seeding density of wheat growing in a sprinkler irrigation system
Using evaluated AquaCrop and Response Surface Method to determine optimum irrigation water and seeding density of wheat growing in a sprinkler irrigation system Open
This study used AquaCrop to predict wheat grain yield under different irrigation and seeding densities. Experimental data from two successive growing seasons during 2004–2006 was used for model calibration and validation. After calibration…
View article: Statistical and Mathematical Modeling for Predicting Caffeine Removal from Aqueous Media by Rice Husk-Derived Activated Carbon
Statistical and Mathematical Modeling for Predicting Caffeine Removal from Aqueous Media by Rice Husk-Derived Activated Carbon Open
One of the solutions to deal with water crisis problems is using agricultural residue capabilities as low-cost and the most abundant adsorbents for the elimination of pollutants from aqueous media. This research assessed the potential of a…
View article: Modified version of the cross-correlation function to measure drought occurrence time-delay correlation
Modified version of the cross-correlation function to measure drought occurrence time-delay correlation Open
According to the importance of assessing the presence of time delay between the occurrence of various hydrological and meteorological phenomena, the study aim is to introduce a new method (with high ability and non-sensitivity to the abnor…
View article: Determining Effective Environmental Factors in the Distribution of Endangered Endemic Medicinal Plant Species Using the BMLR Model: The Example of Wild Celery (Kelussia odoratissima Mozaff., Apiaceae) in Zagros (Iran)
Determining Effective Environmental Factors in the Distribution of Endangered Endemic Medicinal Plant Species Using the BMLR Model: The Example of Wild Celery (Kelussia odoratissima Mozaff., Apiaceae) in Zagros (Iran) Open
Kelussia odoratissima Mozaff. is a medicinal species native to Iran. The goal of this research was to determine the environmental factors important for the distribution of K. doratissima in Iran using BMLR modeling. Six random transects we…
View article: Improved Confidence Interval and Hypothesis Testing for the Ratio of the Coefficients of Variation of Two Uncorrelated Populations
Improved Confidence Interval and Hypothesis Testing for the Ratio of the Coefficients of Variation of Two Uncorrelated Populations Open
One of the most accessible and useful statistical tools for comparing independent populations in different research areas is the coefficient of variation (CV). In this study, first, the asymptotic distribution of the ratio of CV of two unc…
View article: Inference and Local Influence Assessment in a Multifactor Skew-Normal Linear Mixed Model
Inference and Local Influence Assessment in a Multifactor Skew-Normal Linear Mixed Model Open
This work considers a multifactor linear mixed model under heteroscedasticity in random-effect factors and the skew-normal errors for modeling the correlated datasets. We implement an expectation–maximization (EM) algorithm to achieve the …
View article: Fast and Optimal Adaptive Tracking Control: A Novel Meta-Reinforcement Learning via Conditional Generative Adversarial Net
Fast and Optimal Adaptive Tracking Control: A Novel Meta-Reinforcement Learning via Conditional Generative Adversarial Net Open
The control of nonlinear systems with unknown dynamics has been a significant field of research for many years. This paper presents a novel data-driven optimal adaptive control structure with less control effort and faster adaptation than …
View article: Time indexed covariate analysis of the administered vaccine doses on Covid-19 spread
Time indexed covariate analysis of the administered vaccine doses on Covid-19 spread Open
In this study, we focus on the spread of COVID–19 on besides of vaccination of this disease. Total infected cases of COVID–19 have considered and model it by a light/heavy tailed auto–regressive model with innovations belong on the flexibl…
View article: On Comparing Spectral Densities of Several Almost Cyclostationary Processes
On Comparing Spectral Densities of Several Almost Cyclostationary Processes Open
In time series analysis, comparing spectral densities of several processes with almost periodic spectra is an interested problem. The aim of this paper is to give an approach to test the equality among spectral densities of several indepen…
View article: A Practical Approach to Model the H-index based on the Total Number of Citations and the Duration from the Publishing of the First Article
A Practical Approach to Model the H-index based on the Total Number of Citations and the Duration from the Publishing of the First Article Open
The productivity of researchers and the impact of the work they do is a preoccupation of universities, research funding agencies and sometimes even researchers themselves. The h-index is the most popular of different metrics to measure the…
View article: On the Ratio of the Kurtoses of Two Separate Datasets
On the Ratio of the Kurtoses of Two Separate Datasets Open
The ratio of the kurtoses of two separate datasets is an interested parameter in many studies. In this paper, the asymptotic distribution for the ratio of the sample kurtoses of two separate datasets is applied to construct the confidence …
View article: Fuzzy Clustering to Classify Several Regression Models with Fractional Brownian Motion Errors
Fuzzy Clustering to Classify Several Regression Models with Fractional Brownian Motion Errors Open
Clustering numerous regression models fitted on the dataset is one of the most ubiquitous issues in different fields of sciences. This research aims to compare and to classify different regression models with fractional Brownian motion err…
View article: Studying the God’s Traits in Qur’an using Data Visualization Technique
Studying the God’s Traits in Qur’an using Data Visualization Technique Open
In this work we intended to study and compare the traits of God in the Medinan and Meccan Qur'an’s Suras, based on statistics and data visualization. The entire verses of Qur’an were considered and the count of each beauty and divine glory…
View article: Comparative analysis of the Spectral Densities of Independent Cyclostationary Processes
Comparative analysis of the Spectral Densities of Independent Cyclostationary Processes Open
Our primary objective in this article is to compare the spectral densities of numerous cyclostationary processes. By using the limiting distributions of the periodogram and the discrete Fourier transform, a novel approach is introduced to …
View article: Statistical Analysis about the God’s Traits in Quran
Statistical Analysis about the God’s Traits in Quran Open
The fact about the way God has described himself or how Muslims regard God’s traits is a significant point because that is the path to know the truth about God in his own words and the verification of Muslims understanding of God through t…
View article: Analysis of Mystical Concepts in Khaghani’s Divan using Text Mining
Analysis of Mystical Concepts in Khaghani’s Divan using Text Mining Open
Text analysis provides an exciting approach for extracting knowledge from text data. Recently, text analysis has been applied in many research fields. In this study it was demonstrated that how text analysis can be applied to literary rese…
View article: SKEWED AUTO-REGRESSIVE PROCESS WITH EXOGENOUS INPUT VARIABLES: AN APPLICATION IN THE ADMINISTERED VACCINE DOSES ON COVID-19 SPREAD
SKEWED AUTO-REGRESSIVE PROCESS WITH EXOGENOUS INPUT VARIABLES: AN APPLICATION IN THE ADMINISTERED VACCINE DOSES ON COVID-19 SPREAD Open
This study focuses on the prevalence of COVID-19 disease along with vaccination in the United States. We have considered the daily total infected cases of COVID-19 with total vaccinated cases as exogenous input and modeled them using light…
View article: CYCLOCOPULA TECHNIQUE TO STUDY THE RELATIONSHIP BETWEEN TWO CYCLOSTATIONARY TIME SERIES WITH FRACTIONAL BROWNIAN MOTION ERRORS
CYCLOCOPULA TECHNIQUE TO STUDY THE RELATIONSHIP BETWEEN TWO CYCLOSTATIONARY TIME SERIES WITH FRACTIONAL BROWNIAN MOTION ERRORS Open
Detection of relationship between two time series is so important in different scientific fields. Most common techniques are usually sensitive to stationarity or normality assumptions. In this research, a new copula-based method (cyclocopu…
View article: A novel approach to compare the spectral densities of some uncorrelated cyclostationary time series
A novel approach to compare the spectral densities of some uncorrelated cyclostationary time series Open
View article: Clustering the organic soil amendments in combination with phytoremediation of heavy metals contaminated soil
Clustering the organic soil amendments in combination with phytoremediation of heavy metals contaminated soil Open
The pollution of soils and groundwater by heavy metal pollutants is a widespread environmental problem, particularly in Iran. One cost-effective method to remediate the polluted soils is phytoremediation, in which different plants are used…
View article: Reliability analysis of Tension-Leg Platform Tendon with Respect to Fatigue Failure under Environmental Condition of Caspian Sea
Reliability analysis of Tension-Leg Platform Tendon with Respect to Fatigue Failure under Environmental Condition of Caspian Sea Open
Reliability analysis of Tension-Leg Platform Tendon with Respect to Fatigue Failure under Environmental Condition of Caspian Sea
View article: Estimation of stress-strength reliability <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si27.svg"> <mml:mrow> <mml:mi>R</mml:mi> <mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo> <mml:mi>P</mml:mi> <mml:mo stretchy="true">(</mml:mo> <mml:mi>X</mml:mi> <mml:mo>></mml:mo> <mml:mi>Y</mml:mi> <mml:mo stretchy="true">)</mml:mo> </mml:mrow> </mml:math> based on Weibull record data in the presence of inter-record times
Estimation of stress-strength reliability based on Weibull record data in the presence of inter-record times Open