Formulation of approximate mathematical model for incoming water to some dams on Tigris and Euphrates Rivers using spline function

H.A.A Al-Razak; Muna M. Mustafa

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Publication Date

Tue Jan 01 2019

Journal Name

Australian Journal Of Mathematical Analysis And Applications

Volume

2

Issue Number

16

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Formulation of approximate mathematical model for incoming water to some dams on Tigris and Euphrates Rivers using spline function

Approximation mathematical model

Dams

Incoming water

Spline function

Tigers and Euphrates Rivers

Nadia M. J. Ibrahem

H.A.A Al-Razak

Muna M. Mustafa

...Show More Authors

n this paper, we formulate three mathematical models using spline functions, such as linear, quadratic and cubic functions to approximate the mathematical model for incoming water to some dams. We will implement this model on dams of both rivers; dams on the Tigris are Mosul and Amara while dams on the Euphrates are Hadetha and Al-Hindya.

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Publication Date

Thu Feb 01 2018

Journal Name

Journal Of Economics And Administrative Sciences

The technique of converting multi-choice mathematical programming into linear mathematical programming to find the optimal solution

البرمجة الرياضية متعددة الخيارات

تقنية التحويل الى البرمجة الخطية الاعتيادية.

Multi-Choice Mathematical Programming

Transformation Technique

علاء شنيشل

...Show More Authors

The study deals with the issue of multi-choice linear mathematical programming. The right side of the constraints will be multi-choice. However, the issue of multi-purpose mathematical programming can not be solved directly through linear or nonlinear techniques. The idea is to transform this matter into a normal linear problem and solve it In this research, a simple technique is introduced that enables us to deal with this issue as regular linear programming. The idea is to introduce a number of binary variables And its use to create a linear combination gives one parameter was used multiple. As well as the options of linear programming model to maximize profits to the General Company for Plastic Industries product irrigation sy

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Publication Date

Mon Feb 01 2021

Journal Name

Journal Of Engineering

Electrical Conductivity as a General Predictor of Multiple Parameters in Tigris River Based on Statistical Regression Model

Tigris River

Electrical conductivity

Regression

Omar Anmar

Khalid adel

Athraa Hashim

...Show More Authors

Surface water samples from different locations within Tigris River's boundaries in Baghdad city have been analyzed for drinking purposes. Correlation coefficients among different parameters were determined. An attempt has been made to develop linear regression equations to predict the concentration of water quality constituents having significant correlation coefficients with electrical conductivity (EC). This study aims to find five regression models produced and validated using electrical conductivity as a predictor to predict total hardness (TH), calcium (Ca), chloride (Cl), sulfate (SO₄), and total dissolved solids (TDS). The five models showed good/excellent prediction ability of the parameters mentioned

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Publication Date

Mon Feb 01 2021

Journal Name

Https://www.researchgate.net/journal/university-of-baghdad-engineering-journal-1726-4073

Electrical Conductivity as a General Predictor of Multiple Parameters in Tigris River Based on Statistical Regression Model

Electrical Conductivity

Multiple Parameters

Pollutants

Tigris River

Statistical Regression

Modeling

Omar Anmar

Khalid adel

ATHRAA HASHIM

...Show More Authors

Surface water samples from different locations within Tigris River's boundaries in Baghdad city have been analyzed for drinking purposes. Correlation coefficients among different parameters were determined. An attempt has been made to develop linear regression equations to predict the concentration of water quality constituents having significant correlation coefficients with electrical conductivity (EC). This study aims to find five regression models produced and validated using electrical conductivity as a predictor to predict total hardness (TH), calcium (Ca), chloride (Cl), sulfate (SO4), and total dissolved solids (TDS). The five models showed good/excellent prediction ability of the parameters mentioned above, which is a very

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Publication Date

Tue Sep 30 2014

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Analytical Model for Detection the Tilt in Originally Oil Water Contacts

Capillary pressure

Tilted oil water contact

Jalal

...Show More Authors

Many carbonate reservoirs in the world show a tilted in originally oil-water contact (OOWC) which requires a special consideration in the selection of the capillary pressure curves and an understanding of reservoir fluids distribution while initializing the reservoir simulation models.
An analytical model for predicting the capillary pressure across the interface that separates two immiscible fluids was derived from reservoir pressure transient analysis. The model reflected the entire interaction between the reservoir-aquifer fluids and rock properties measured under downhole reservoir conditions.
This model retained the natural coupling of oil reservoirs with the aquifer zone and treated them as an explicit-region composite system

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Publication Date

Thu Sep 01 2022

Journal Name

Iop Conference Series: Earth And Environmental Science

Monitoring the Water Quality of Tigris River by Applied Overall Index of Pollution

Shaimaa Satar

Fikrat M.

...Show More Authors

Abstract<p>The alteration in the hydrological regime in Iraq and the anthropogenic increasing effect on water quality of a lotic ecosystems needs to continuous monitoring. This work is done to assess the water quality of Tigris River within Baghdad City. Five sites were selected along the river and ten physicochemical parameters and Overall Index of Pollution (OIP) were applied to assess the water quality for the period between November 2020 and May 2021, the studied period were divided into dry and wet seasons. These parameters were water temperature, pH, dissolved oxygen (DO), biological oxygen demand (BOD), total hardness, alkalinity, turbidity, total phosphorus, total nitrogen, electrical co</p> ... Show More

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Publication Date

Sun Sep 22 2019

Journal Name

Baghdad Science Journal

Estimation of Survival Function for Rayleigh Distribution by Ranking function:-

Fuzzy number

Hazard function

Ordinary least squares estimator method

Rank set estimator method

Survival function.

Hussein

...Show More Authors

In this article, performing and deriving te probability density function for Rayleigh distribution is done by using ordinary least squares estimator method and Rank set estimator method. Then creating interval for scale parameter of Rayleigh distribution. Anew method using is used for fuzzy scale parameter. After that creating the survival and hazard functions for two ranking functions are conducted to show which one is beast.

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(2)

Publication Date

Tue Jun 30 2020

Journal Name

Journal Of Economics And Administrative Sciences

Using The Maximum Likelihood And Bayesian Methods To Estimate The Time-Rate Function Of Earthquake Phenomenon

عمليات بواسون غير المتجانسة

الإمكان الأعظم

خوارزمية كبس

خوارزمية متروبولس هاستنكس

الطريقة البيزية.

علي محمد

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In this research, we dealt with the study of the Non-Homogeneous Poisson process, which is one of the most important statistical issues that have a role in scientific development as it is related to accidents that occur in reality, which are modeled according to Poisson’s operations, because the occurrence of this accident is related to time, whether with the change of time or its stability. In our research, this clarifies the Non-Homogeneous hemispheric process and the use of one of these models of processes, which is an exponentiated - Weibull model that contains three parameters (α, β, σ) as a function to estimate the time rate of occurrence of earthquakes in Erbil Governorate, as the governorate is adjacent to two countr

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Publication Date

Sun Jun 02 2019

Journal Name

Baghdad Science Journal

Estimating the Reliability Function of (2+1) Cascade Model

Attenuation factor

Least Square

Scale parameter

Simulation

Strength-Stress

Khaleel

...Show More Authors

This paper discusses reliability R of the (2+1) Cascade model of inverse Weibull distribution. Reliability is to be found when strength-stress distributed is inverse Weibull random variables with unknown scale parameter and known shape parameter. Six estimation methods (Maximum likelihood, Moment, Least Square, Weighted Least Square, Regression and Percentile) are used to estimate reliability. There is a comparison between six different estimation methods by the simulation study by MATLAB 2016, using two statistical criteria Mean square error and Mean Absolute Percentage Error, where it is found that best estimator between the six estimators is Maximum likelihood estimation method.

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Publication Date

Mon Feb 14 2022

Journal Name

Proceedings Of The National Academy Of Sciences

Pharmaceutical pollution of the world’s rivers

John L.

Alistair B.A.

Dana W.

Kenneth M. Y.

Racliffe W. S.

Cristóbal

Aiko D.

Julie

Marc

Robert A.

Alejandra

Aida

Anja

Pedro

Macarena

Chris

Magdalena

Monique

Thais

Vahagn

Yekaterina

Clare S.

Christopher J.

Thilo

Tapos

Volga

Jessica

Jean L.

Francisco

Maria T. P.

Victorien

Gildas

Oumar

Jules M.

Linda E.

Michelle

Donald

Romaric

Jaime

Guang-Guo

Chang-Er

Martha

Jina

Jean-Paul

John

Suspense A.

Penelope

Silvia

Nikolina

Milena

Despo

Lida

Vladimíra

Jan

María

Bayable A.

Jeanne

Arnaud

Peter

Ilia

Sven

Gerasimos

Halldór P.

Molly

Thatikonda

Manisha

Anindrya

Adee

Nima

Ali

Omar

Salem S.

Francesco

Benny

Tom

Koffi Marcellin

Bakhyt

Raikhan

Lydia

Jemimah K.

Peter

Victor

Nathaniel T.

Sheck

Ahmad Zaharin

Ley Juen

Mahamoudane

Seydou T.

Rik

Olatayo

Muhammad

Ziad

Aaron

Jorge Manuel

María

Heidi

Ian

Fabio

Alhaji Brima

Bashiru M.

Vesna

Mitja

Melusi

Kyungho

Habyeong

John L. Celestino

Andreu

Priyanie

Anna

Gisela

Armin K.

Alex C.

Jheng-Jie

Rebecca

Madaka

Ulas

Turgut T.

Julius B.

Yuliya

Yuriy

Horacio

Andrés

Douglas B.

Maritza

David

Charles

...Show More Authors

Environmental exposure to active pharmaceutical ingredients (APIs) can have negative effects on the health of ecosystems and humans. While numerous studies have monitored APIs in rivers, these employ different analytical methods, measure different APIs, and have ignored many of the countries of the world. This makes it difficult to quantify the scale of the problem from a global perspective. Furthermore, comparison of the existing data, generated for different studies/regions/continents, is challenging due to the vast differences between the analytical methodologies employed. Here, we present a global-scale study of API pollution in 258 of the world’s rivers, representing the environmental influence of 471.4 million people across

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(954)

Publication Date

Sat Jul 08 2017

Journal Name

Iraqi Journal Of Pharmaceutical Sciences ( P-issn 1683 - 3597 E-issn 2521 - 3512)

Formulation Characterization and Evaluation of Meloxicam Nanoemulgel to be Used Topically

Keywords: Meloxicam

Nanoemulgel

Arthritis.

Hayder

Ahmad

...Show More Authors

Meloxicam is a non-steroidal anti-inflammatory drug. It is practically insoluble in water. It is associated with gastrointestinal side effects at high doses on long term treatment. The aim of this investigation to formulate and evaluate gellified nanoemulsion of meloxicam as a topical dosage form to enhance meloxicam therapeutic activity and reduce systemic side effect.

The pseudo ternary phase diagrams were made, including the oil mixture which is composed of almond oil and peppermint oil at a ratio (1:2), variable surfactant mixture (S mix) which are tween 80 and ethanol at ratios of (1:1, 2:1, 3:1, and 4:1) and double distilled water. Slow dripping of double distilled water to the combination of the oil mixtu

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