2013 Africon最新文献_第9页

Electricity access in Nigeria: Viability of off-grid photovoltaic system 尼日利亚的电力接入:离网光伏系统的可行性

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757778

U. Akpan, Salisu R. Isihak, Y. N. Udoakah

{"title":"Electricity access in Nigeria: Viability of off-grid photovoltaic system","authors":"U. Akpan, Salisu R. Isihak, Y. N. Udoakah","doi":"10.1109/AFRCON.2013.6757778","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757778","url":null,"abstract":"This study examines the viability of providing electricity to an un-electrified village in North-Eastern Nigeria using a mini-grid based off-grid solar photovoltaic system. The study employs the life-cycle cost to estimate a 25-year life-time cost of an off-grid electrification project using solar photovoltaic panels and compares with the cost of paying for grid-electricity within the same period. Comparing the cost of off-grid electrification with grid-extension is more appropriate; however, data on the cost of grid extension in Northern Nigeria are scarce. Thus, electricity tariff is used as a proxy since the Nigerian electricity market has been deregulated and the electricity tariff is expected to be market-reflective. The result shows that such project will not be economically viable at the prevailing commercial lending rate as it yields a negative net present value. However, the project becomes viable with adequate government support through the reduction in commercial lending rate for such projects and provision of start-up grants (as production subsidy). Such subsidy will not result in economic waste since the target is clearly defined. Apart from government financial incentives, creating necessary support mechanism in terms of legal and regulatory frameworks to encourage private investment will be necessary. In addition, engaging the community in the construction and maintenance of the project will ensure sustainability.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128355273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Fibre-to-the-Hut: Research into tailored FTTH solutions for Africa 光纤到户:为非洲量身定制光纤到户解决方案的研究

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757618

R. Gamatham, E. Rotich, A. Leitch, T. Gibbon

引用次数: 4

Decision factors for locating in an automotive supplier park: A South African case 汽车供应商园区选址的决策因素:一个南非案例

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757811

V. Mammen, J. Steyn

引用次数: 1

Interpolation and mapping of the median k-factor for terrestrial link applications in South Africa 南非地面链路应用中位数k因子的插值和制图

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757759

A. Nyete, T. Afullo

引用次数: 2

Performance evaluation of wire pairs in telecommunications networks by fuzzy and evolutionary models 基于模糊演化模型的电信网络线对性能评价

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757602

F. Lilik, L. Kóczy

引用次数: 6

Biodiesel production from used cooking oil using controlled reactor plant 利用可控反应器装置从废食用油生产生物柴油

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757725

Ejike K. Okoye, Charles P. C. Edeh, Chinyere O. Ezumezu, E. Ejiogu

{"title":"Biodiesel production from used cooking oil using controlled reactor plant","authors":"Ejike K. Okoye, Charles P. C. Edeh, Chinyere O. Ezumezu, E. Ejiogu","doi":"10.1109/AFRCON.2013.6757725","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757725","url":null,"abstract":"Transesterification of waste (used) cooking oil presents an economic and environmental friendly means of producing biodiesel. In Africa and Nigeria in particular, the production of biodiesel from waste cooking oil will also serve to eliminate or at least reduce a looming potential health risk associated with the consumption of over used cooking oil among the populace particularly those working in hotels, restaurants, eateries, etc and their families. Biodiesel is an alternative diesel fuel produced from a catalyzed reaction of the triglycerides in the oil or fat with a simple monohydric alcohol (methanol). The thrust of this work is the design and building of a compact table-top chemical reactor for carrying out trans-esterification of used cooking oil for the production of biodiesel. We first designed a special filter used to filter the used vegetable oil. The filter was made of activated carbon felt material, having an equivalent surface area of 1300m2/g. Subsequently, we developed a process to produce biodiesel from a compact chemical reactor plant with a control system using temperature sensors and an adjustable speed electric drive. Detailed operating conditions and equipment design for the process were obtained and analysis of the characteristic properties of our product was carried out to evaluate the technical and economic benefits, including environmental effects. Our analysis showed that the biodiesel we produced using waste cooking oil (used vegetable oil) met with international standards such as ASTM D 6751-07b. The cost of our pilot-scale produced biodiesel was $0.52/litre, which is about half the price of petroleum diesel in the Nigerian market. Thus, biodiesel from waste cooking oil proved to be technically and economically feasible and can be a competitive alternative to the highly priced petroleum diesel.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133875478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Formal verification and validation of DEVS simulation models DEVS仿真模型的形式化验证与验证

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757720

Soremekun Ezekiel Olamide, M. Traoré

{"title":"Formal verification and validation of DEVS simulation models","authors":"Soremekun Ezekiel Olamide, M. Traoré","doi":"10.1109/AFRCON.2013.6757720","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757720","url":null,"abstract":"We present a model-based verification technique built on selective and pragmatic use of formal methods, by using simplified model checking tools that focus on error detection rather than formalized proofs. This framework is to check and confirm that the trajectories and events of DEVS-Driven Modeling Language (DDML) simulation models and that of the real system agree in order to achieve replicative, predictive and structural validity through the lightweight application of formal methods. This is to reduce and ease the Simulation model verification efforts while increasing the coverage of the process, in order to verify the transformational accuracy of the model development process, increase confidence in the simulation model and allow for performance evaluation of simulation models. This framework provides a model refinement iterative procedure that helps to enhance the DEVS Simulation Model, correct errors or adapt to changing contextual requirements. This refinement procedure is applicable to evolutionary software development and systems requiring rapid prototyping, in order to meet up with changing requirements of such systems with the aid of iterative refinement. Furthermore, we present a case study example of a GSM telecommunication system to reveal the ability of this framework to not only formally verify system but also refine their models.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122436789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Connecting industrial automation software to a discrete manufacturing plant model for research and education 将工业自动化软件连接到用于研究和教育的离散制造工厂模型

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757722

K. Phillips, B. Gruszka, Johnson Carroll, M. Bauer, O. Maharaj

引用次数: 5

Ensemble multisensor data using state-of-the-art classification methods 使用最先进的分类方法集成多传感器数据

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757711

Bhekisipho Twala, F. Mekuria

引用次数: 3

Orthogonal receive symbols at the receiver for fast-fading Rayleigh channels 快速衰落瑞利信道接收机上的正交接收符号

2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757754

Stephan Ludwig, Jens Börner, B. Lankl

引用次数: 0