Optimal placement algorithm (OPA) for IoT over ICN

In this letter, we propose an energy-efficient 3- dimensional placement of multiple aerial access points (AAPs), in the desired area, acting as flying base stations for uplink communication from a set of ground user equipment (UE). The globally optimal energy-efficient vertical position of AAPs is derived analytically by considering the inter-cell interference and AAP energy consumption. The horizontal position of AAPs, which maximize the packing density of the AAP coverage area, are determined using a novel regular polygon-based AAP placement algorithm. We also determine an accurate upper bound on the maximum number of AAPs that could be deployed in a given circular area. The effect of the AAP energy consumption on the optimal placement and the analytic findings are verified via numerical simulations

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PMU Optimal Placement Algorithm Using Topological Observability Analysis

Journal of Electrical Engineering and Technology ◽

10.1007/s42835-021-00822-5 ◽

2021 ◽

Author(s):

Byoung-Ho Kim ◽

Hongrae Kim

Keyword(s):

Optimal Placement ◽

Observability Analysis ◽

Placement Algorithm

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DEVELOPMENT OF AN OPTIMAL PLACEMENT ALGORITHM FOR ELECTROCHEMICAL PROTECTION OF UNDERGROUND STEEL GAS PIPELINES

Russian Journal of Building Construction and Architecture ◽

10.36622/vstu.2020.2.46.001 ◽

2020 ◽

pp. 6-17

Author(s):

O. N. Medvedeva ◽

S. I. Astashev

Keyword(s):

Gas Storage ◽

Operational Reliability ◽

Negative Influence ◽

Technical Condition ◽

Optimal Number ◽

Optimal Placement ◽

Underground Gas Storage ◽

Electrochemical Protection ◽

Mode Of Operation ◽

Placement Algorithm

Statement of the problem. The paper considers the process of complex periodic corrosion inspection in order to assess the effectiveness and improve the operational reliability of the corrosion protection system (CPS) using the example of on-site technological networks of the underground gas storage Elshanskaya. Results. The technical condition of the electrochemical protection means, the level of active protection and the technical condition of pipelines of the underground gas storage were assessed, the object was protected by its length and time, and zones of negative influence of constant and stray currents were identified. A method is proposed for determining the optimal number and locations of cathodic protection stations (CPS). Conclusions. Based on the research results, a commissioning method is proposed that provides the optimal technological mode of operation of electrochemical protection means (EChP), and proposals have been developed to ensure the effectiveness of diagnostics and the safety of further operation of gas distribution pipelines. The implementation of this approach in the design of EChP facilities can lead to a significant reduction in energy consumption during operation.

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Development of an Optimal Placement Algorithm for Electrochemical Protection of Underground Steel Gas Pipelines

НАУЧНЫЙ ЖУРНАЛ СТРОИТЕЛЬСТВА И АРХИТЕКТУРЫ ◽

10.36622/vstu.2020.58.2.001 ◽

2020 ◽

pp. 9-19

Author(s):

О. Н. Медведева ◽

С. И. Асташев ◽

В. Н. Мелькумов

Keyword(s):

Gas Storage ◽

Operational Reliability ◽

Negative Influence ◽

Technical Condition ◽

Optimal Number ◽

Optimal Placement ◽

Underground Gas Storage ◽

Electrochemical Protection ◽

Mode Of Operation ◽

Placement Algorithm

Постановка задачи. Рассматривается процесс комплексного периодического коррозионного обследования с целью оценки эффективности и повышения эксплуатационной надежности системы противокоррозионной защиты на примере внутриплощадочных технологических сетей компрессорного цеха Елшанской станции подземного хранения газа (СПХГ). Результаты. Произведена оценка технического состояния средств электрохимической защиты, уровня активной защиты и технического состояния отдельных элементов трубопроводов Елшанской СПХГ, определена защищенность объекта по протяженности и во времени, выявлены зоны негативного влияния постоянных и блуждающих токов. Предложен метод определения оптимального количества и мест размещения станций катодной защиты на примере площадки СПХГ. Выводы. По результатам исследований предложен способ наладки, обеспечивающий оптимальный технологический режим работы средств электрохимической защиты, разработаны предложения по обеспечению эффективности диагностики и безопасности дальнейшей эксплуатации газораспределительных трубопроводов. Реализация данного подхода при проектировании средств электрохимической защиты позволит существенно снизить энергозатраты при эксплуатации. Statement of the problem. The paper considers the process of complex periodic corrosion inspection in order to assess the effectiveness and improve the operational reliability of the corrosion protection system using the example of on-site technological networks of the underground gas storage Yelshanskaya. Results. The technical condition of the electrochemical protection tools, the level of active protection and the technical condition of pipelines of the underground gas storage were assessed, the object was protected by its length and time, and zones of negative influence of constant and stray currents were identified. A method is proposed for determining the optimal number and locations of cathodic protection stations. Conclusions. Based on the research results, a commissioning method is proposed that provides the optimal technological mode of operation of electrochemical protection tools. Proposals have been developed to ensure the effectiveness of diagnostics and safety of further operation of gas distribution pipelines. The implementation of this approach in the design of electrochemical protection means facilities might lead to a significant reduction in energy consumption during operation.

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A Comparative Study of Services Placement Algorithms in Future Networks: دراسة مقارنة لخوارزميّات توضيع الخدمات في الشّبكات المستقبليّة

Journal of engineering sciences and information technology - مجلة العلوم الهندسية و تكنولوجيا المعلومات ◽

10.26389/ajsrp.j240621 ◽

2021 ◽

Vol 5 (5) ◽

pp. 64-51

Author(s):

Manar Yacoub Al-Jabr, Ali Diab, Jomana diab Manar Yacoub Al-Jabr, Ali Diab, Jomana diab

Keyword(s):

Optimal Placement ◽

Management Service ◽

Placement Problem ◽

Qualitative Comparison ◽

Comprehensive Knowledge ◽

Future Networks ◽

Placement Algorithms ◽

Placement Algorithm ◽

The Cost ◽

The Ideal

The study aimed to analyze and compare several algorithms in the context of networks services placement, and then proposed a self-organized dynamic heuristic algorithm adaptable to continually changing network conditions in order to achieve the ideal placement of services replicas in future networks. It is known that future networks demand a high degree of self-organization to keep pace with ongoing changes while maintaining performance optimized. One of the important challenges in this context is the services placement problem. Service placement issue refers to the selection of the most appropriate network node for hosting a service. The ideal placement of services replicas reduces the cost of serving customers, improves connectivity between clients and servers as well as the use of available resources. The study summarized the results of qualitative comparison between several placement algorithms and refers to the most important requirements to be taken into account when implementing the placement algorithm. Generally, each service has its own placement technique, and the action taken by a specific service may affect other services decisions and force them to adapt. There is an urgent need to a management service for managing services replicas to make the optimal placement decision. This service should work in a distributed manner and does not require comprehensive knowledge about the network. It is also characterized by its ability to adapt to changing network conditions in terms of load and topology. Other services coordinate with the management service about replicating or migrating actions, thus services will be offered at a minimized cost.

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