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Article
Analysis of Scalability and Sensitivity for Chaotic Sine Cosine Algorithms

Authors: Ramzy S. Ali --- Dunia S. Tahir
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2018 Volume: 14 Issue: 2 Pages: 139-154
Publisher: Basrah University جامعة البصرة

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Abstract

Chaotic Sine-Cosine Algorithms (CSCAs) are new metaheuristic optimization algorithms. However, Chaotic Sine-Cosine Algorithm (CSCAs) are able to manipulate the problems in the standard Sine-Cosine Algorithm (SCA) like, slow convergence rate and falling into local solutions. This manipulation is done by changing the random parameters in the standard Sine-Cosine Algorithm (SCA) with the chaotic sequences. To verify the ability of the Chaotic Sine-Cosine Algorithms (CSCAs) for solving problems with large scale problems. The behaviors of the Chaotic Sine-Cosine Algorithms (CSCAs) were studied under different dimensions 10, 30, 100, and 200. The results show the high quality solutions and the superiority of all Chaotic Sine-Cosine Algorithms (CSCAs) on the standard SCA algorithm for all selecting dimensions. Additionally, different initial values of the chaotic maps are used to study the sensitivity of Chaotic Sine-Cosine Algorithms (CSCAs). The sensitivity test reveals that the initial value 0.7 is the best option for all Chaotic Sine-Cosine Algorithms (CSCAs).


Article
OSCH-LEACH: Optimum Secondary Cluster Head Selection for LEACH Protocol
OSCH-LEACH : اختيار امثل راس عنقود ثانوي لبروتوكول LEACH

Author: Saad Hameed Abid سعد حميد عبد
Journal: AL-MANSOUR JOURNAL مجلة المنصور ISSN: 18196489 Year: 2018 Issue: 30 Pages: 67-85
Publisher: Private Mansour college كلية المنصور الاهلية

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Abstract

A wireless sensor network consists of a bundle of sensor nodes which is using for monitoring and recording variety phenomenon’s such as pressure, wind direction and speed, home security, machine failure diagnosis and biological detection. When the information collected and be together in an energy efficient manner help the sensor network to operate for long interval. The transmitted data between sensor nodes and Base station is as a result of fusion data in (WSN). And the LEACH (Low Energy Adaptive Clustering Hierarchy) protocol come with solutions for all data collection problems, when the clusters are arranged in self-organized manner, but it still suffering from some downside that can cause fatal problems.To save the energy and based on the research of LEACH protocol, an optimum secondary cluster head low energy clustering protocol OSCH-LEACH is proposed in this paper. In the new protocol, in any round when the cluster head located in not good place -near the edge of the cluster and far away from many sensors - Cuckoo search algorithm is suggested to find the optimum secondary cluster head that take the role of the primary cluster head for those remote sensors i.e. aggregate data from those remote sensors and send the report to the primary cluster head. The experimental results show that OSCH-LEACH performs better than LEACH protocol. It not only extends the lifetime of the network, but also improves the energy efficiency by increasing the settle down and unsettle down period, number of alive nodes with time, and minimize energy consumption.

شبكه المتحسسات اللاسلكيه تتكون من عدد من عناقيد المتحسسات التي تستخدم في مراقبه وتسجيل عدد من الظواهر مثل الضغط، سرعه واتجاه الرياح، امنيه المنازل، تشخيص اعطال المكائن، و اكتشاف الاخطاء البيولوجيه. ان جمع المعلومات مع بعضها بطريقه كفوءه من ناحيه استهلاك الطاقه تساهم في اطاله عمر الشبكه. ان البيانات تنتقل على شكل اشارات بين المتحسسات والمحطه الرئيسيه . ان بروتول LEACH يعتبر من اشهر البروتوكولات من حيث كفاءه حفظ الطاقه ولكنه مازال يعاني من بعض المشاكل التي قد تسبب مشاكل كبيرة.لغرض حفظ الطاقه بهدف اطاله عمر الشبكه لفترة اطول تم اقتراح اختيار امثل راس عنقود ليكون راس عنقود ثانوي حيث ان في اي دورة اذا كان راس العنقود الرئيسي في مكان غير مناسب- قرب حدود العنقود وبعيد عن كثير من المتحسسات- لذلك اختبرت خوارزميه طائر الوقواق لايجاد المتحسس الامثل لياخذ دور راس العنقود الرئيسي لهؤلاء المتحسسات البعيده حيث يقوم بجمع البيانات ويستخرج منها تقرير واحد يرسله الى راس العنقود الرئيسي. الخوارزميه المقترحه اظهرت نتائج افضل من حيث استهلاك الطاقه واطاله عمر الشبكه.

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