AFRICON 2009最新文献_第4页

Modeling learning of derivation morphology in a multi-agent simulation 多智能体仿真中派生形态的建模学习

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308103

O. Pustylnikov

引用次数: 4

Effect of variation in modelling of generator saturation on electromechanical modes 发电机饱和模型的变化对机电模式的影响

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308173

K. Kaberere, A. Petroianu, K. Folly

引用次数: 2

Information and Communication Technology policy imperatives for rural women empowerment: focus on South Africa 赋予农村妇女权力的信息和通信技术政策的必要性:以南非为重点

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308397

M. Joseph, T. Andrew

{"title":"Information and Communication Technology policy imperatives for rural women empowerment: focus on South Africa","authors":"M. Joseph, T. Andrew","doi":"10.1109/AFRCON.2009.5308397","DOIUrl":"https://doi.org/10.1109/AFRCON.2009.5308397","url":null,"abstract":"It has been established that Information and Communication Technologies (ICTs) are key drivers for rural development. However, while many countries such as India and South Africa have made significant investments in rural ICT infrastructure and its developmental spin-offs, rural women are still neglected when it comes to access to ICTs. This neglect is evident in the ICT policy initiatives in South Africa as an example, where the relevant policies lack any significant or direct attention to rural women's development. If ICT policies do not address the gendered digital divide in rural areas gender inequality will be encouraged. This paper gives insights on how information exchange by means of ICTs such as Internet, mobile phones and radio could foster economic growth and empowerment of rural women in South Africa. In addition, the paper discusses the role of relevant stakeholders in ICT policy formulation for more effective and appropriate communication, and innovative ways of using ICTs for women empowerment in rural areas. The authors make recommendations for ICT policy development that would better serve the needs of rural women leading to their empowerment.","PeriodicalId":122830,"journal":{"name":"AFRICON 2009","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124784506","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: 7

Input-output linearizing and decoupling control of a nonholonomic power wheelchair 非完整电动轮椅的输入输出线性化解耦控制

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308161

S.A. Nyabundi, G. Qi, Y. Hamam, J. Munda

{"title":"Input-output linearizing and decoupling control of a nonholonomic power wheelchair","authors":"S.A. Nyabundi, G. Qi, Y. Hamam, J. Munda","doi":"10.1109/AFRCON.2009.5308161","DOIUrl":"https://doi.org/10.1109/AFRCON.2009.5308161","url":null,"abstract":"While nonholonomic-powered wheelchairs (NPWs) have made advances over the past three decades, the control algorithms remain virtually unchanged since 1980's. The simple proportional-integral (PI) controller is antiquated, and does not perform well in the presence of disturbances, sensors uncertainties, nonlinearities and load variations. The practical interest is driven by the fact that today's wheelchairs need to be operated under tighter performance specifications. At the same time more and more constraints, stemming for example from environmental and safety considerations, need to be satisfied. Often these demands can only be met when nonlinearities and constraints are explicitly considered in the controller. A new approach to trajectory tracking control for wheelchair systems containing uncertain, nonsmooth nonlinearities is proposed. The method is based on decoupling theory and system input-output feedback linearization technique by which the system stability and convergence of velocity tracking errors to zero are rigorously examined. The effectiveness and efficiency of the proposed controller is demonstrated through simulation studies. The study would result in better driving performance, smoother feel, and fewer accidents or inadvertent collisions.","PeriodicalId":122830,"journal":{"name":"AFRICON 2009","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125269527","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: 4

Load flow analysis with a neuro-fuzzy model of an induction motor load 基于神经模糊模型的异步电机负载流分析

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308308

C. Muriithi, L. Ngoo, G. Nyakoe

引用次数: 8

Polarity reinforcement: Sentiment polarity identification by means of social semantics 极性强化:通过社会语义识别情感极性

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308104

Ulli Waltinger

引用次数: 15

Accurate passivity enforcement algorithm for broadband S-parameter macromodels 宽带s参数宏模型的精确无源增强算法

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308273

D. Deschrijver, T. Dhaene

引用次数: 1

Small fuel cell powering an unmanned aerial vehicle 小型燃料电池为无人驾驶飞行器提供动力

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308096

M. Furrutter, J. Meyer

引用次数: 25

A neural fuzzy based maximum power point tracker for a photovoltaic system 基于神经模糊的光伏系统最大功率跟踪系统

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308552

Christopher A. Otieno, G. Nyakoe, C. Wekesa

{"title":"A neural fuzzy based maximum power point tracker for a photovoltaic system","authors":"Christopher A. Otieno, G. Nyakoe, C. Wekesa","doi":"10.1109/AFRCON.2009.5308552","DOIUrl":"https://doi.org/10.1109/AFRCON.2009.5308552","url":null,"abstract":"The global electrical energy consumption is steadily rising and therefore there is need to increase the power generation capacity. The required capacity increase can be based on renewable energy. Photovoltaic energy remains a largely unexploited renewable energy source due to low conversion efficiency of the photovoltaic modules. To maximize the power derived from the PV systems it is important to operate the panel at its optimal power point by use of a maximum power point tracker (MPPT). MPPTs find and maintain operation at the maximum power point, using an MPPT algorithm. This paper presents a high performance tracking of maximum power delivered from photovoltaic systems using adaptive neural fuzzy inference systems (ANFIS). This method combines the learning abilities of artificial neural networks and the ability of fuzzy logic to handle imprecise data. It is therefore able to handle non linear and time varying problems hence making it suitable for this work. It is expected that this method will be able to accurately track the maximum power point. This will ensure efficient use of PV systems and therefore leading to reduced cost of electricity. The performance of the proposed method was compared to that of a fuzzy logic based MPPT to demonstrate its effectiveness over other previously used MPPT techniques.","PeriodicalId":122830,"journal":{"name":"AFRICON 2009","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121357234","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: 57

A dual time-frequency-feature investigation and diagnostics of a cracked de-laval rotor 双时频特征分析与转子裂纹诊断

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308079

A. Alugongo

引用次数: 3