Preferred Language
Articles
/
jeasiq-1598
Comparison of classical method and optimization methods for estimating parameters in nonlinear ordinary differential equation
...Show More Authors

 ABSTRICT:

  This study is concerned with the estimation of constant  and time-varying parameters in non-linear ordinary differential equations, which do not have analytical solutions. The estimation is done in a multi-stage method where constant and time-varying parameters are estimated in a straight sequential way from several stages. In the first stage, the model of the differential equations is converted to a regression model that includes the state variables with their derivatives and then the estimation of the state variables and their derivatives in a penalized splines method and compensating the estimations in the regression model. In the second stage, the pseudo- least squares method was used to estimate the constant parameters. In the third stage, the remaining constant parameters and the time-varying parameters are estimated by using a semi-parametric regression model. This method is compared with the optimization method, which depends on the algorithm of differential evolution algorithm to estimate unknown parameters. The comparison was made using simulations. The results showed that the results were better to the method based on the differential evolution algorithm.

Crossref
View Publication Preview PDF
Quick Preview PDF
Publication Date
Sun Dec 02 2007
Journal Name
Political Sciences Journal
الخطاب السياسي الاسلامي واشكالية المراوحة بين الشورى والديمقراطية
...Show More Authors

الخطاب السياسي الاسلامي واشكالية المراوحة بين الشورى والديمقراطية

View Publication Preview PDF
Crossref
Publication Date
Fri Nov 01 2013
Journal Name
كلية الآداب
نظرية الشك بين استشراقية مرجليوث واستغرابية طه حسين
...Show More Authors

نظرية الشك بين استشراقية مرجليوث واستغرابية طه حسين

Publication Date
Fri Jan 01 2021
Journal Name
عدد خاص بابحاث المؤتمر العلمي الدولي الخامس المشترك الثالج / الجامعة العراقية / مجلة العلوم الاسلامية
التسامح الديني مفتاح لبوابة التعايش السلمي بين الشعوب
...Show More Authors

يهدف هذا البحث إلى بيان أن الأديان في مقاصدها وأصولها وفروعها تلتقي على التسامح المؤدي إلى التعايش السلمي بين مجموعة مختلفة في الدين أو اللون أو القومية أو الفكر من خلال إعطاء حرية التعبير والفكر والتمذهب والعقيدة لكل إنسان وإن كان مخالفا معنا؛ حيث تفيذ نصوصها الأحقاد والكراهية، وتدعو إلى التأخي بين البشر محققة بذلك التعايش السلمي المنشود، بل وتحض الإنسان على حماية أخيه الإنسان وصيانة حياته وممتلكاته أيا ك

... Show More
View Publication
Publication Date
Sun Jan 01 2006
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
التقدير الضريبي الذاتي بين حسن الاختيار وسوء التطبيق
...Show More Authors

          

View Publication Preview PDF
Publication Date
Mon Mar 01 2004
Journal Name
Al-academy
كلية الفنون الجميلة بين تقادم المعرفة وعصر التحديات
...Show More Authors

كلية الفنون الجميلة بين تقادم المعرفة وعصر التحديات

View Publication Preview PDF
Publication Date
Mon Apr 29 2019
Journal Name
Arab Science Heritage Journal
الحماية الحماية القانونية للمخطوطات الوطنية بين الواقع والقانون
...Show More Authors

Maintaining the manuscript, keep on national identity are a means to write history, so states seek to maintain, through a set of legal rules that criminalize the abuse as well as the development of national and international legal mechanisms. Algeria, was a state of the colony

View Publication Preview PDF
Publication Date
Wed Nov 09 2011
Journal Name
المجلة السياسية والدولية
جدلية العلاقة بين الديمقراطية وتداول السلطة : العراق انموذجا
...Show More Authors

تعد الدیمقراطیة الخیار المناسب للمشكلات والأزمات التي تواجه أقطار الوطن العربي بـشكل عـام والعـراق ٕ بــشكل خــاص، فهــي لا تقــدم المعالجــات والحلــول الآنیــة لهــذه المــشكلات والأزمــات فحــسب،وانما تــضع الأطـــر والسیاقات لنمو وتطور النظام السیاسي وبناء هیكل دولة عصریة حدیثة. وفي الوقت الذي تحظى فیه الجوانب المؤسسیة بأهمیة قصوى فـي إطـار العملیـة الدیمقراطیـة، فـان غیابهـا یعمل على تشویه هذه ا

... Show More
View Publication Preview PDF
Publication Date
Sat Jun 01 2013
Journal Name
Journal Of Economics And Administrative Sciences
underemployment
...Show More Authors

underemployment

View Publication Preview PDF
Crossref
Publication Date
Tue Aug 03 2021
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
Accounting disclosure of social responsibility and its impact on achieving sustainable development goals: (Applied research in the State Company for Food Industries- Diwaniyah Dairy Factory)
...Show More Authors

The researchers seek to shed light on the importance of accounting disclosure on social responsibility, and the research aims to provide a theoretical approach to social accounting and its disclosure, identify the concept of sustainable development, highlight the theoretical foundations of sustainable development and employ disclosure of social responsibility towards achieving the goals of sustainable development, and identify the impact of The accounting disclosure on social responsibility in achieving sustainable development goals, and the research problem can be reviewed by asking the following question (Does the accounting disclosure of the social responsibility of economic units contribute to achieving sustainable developmen

... Show More
View Publication Preview PDF
Publication Date
Thu Oct 01 2015
Journal Name
Journal Of Economics And Administrative Sciences
Building discriminant function for repeated measurements data under compound symmetry (CS) covariance structure and applied in the health field
...Show More Authors

Discriminant analysis is a technique used to distinguish and classification an individual to a group among a number of  groups based on a linear combination of a set of relevant variables know discriminant function. In this research  discriminant analysis used to analysis data from repeated measurements design. We  will  deal  with the problem of  discrimination  and  classification in the case of  two  groups by assuming the Compound Symmetry covariance structure  under  the  assumption  of  normality for  univariate  repeated measures data.

 

... Show More
View Publication Preview PDF
Crossref