IEEE Africon '11最新文献_第6页

Dual pump fibre optical parametric amplifier based on four-wave mixing in a highly nonlinear fibre 高非线性光纤中基于四波混频的双泵浦光纤参量放大器

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072118

E. K. Kipnoo, D. Waswa, K. Muguro, A. Leitch

引用次数: 1

Implementation of a primary tapped transformer in a high frequency isolated power converter 高频隔离电源变换器中一次抽头变压器的实现

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072058

A. Joannou, D. Pentz

引用次数: 4

Direct and indirect feed-in for inductive power transfer systems with multiple loads 多负荷感应输电系统的直接和间接馈电

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072094

Michael Gleissner, M. Söllner, Hans-Peter Schmidt

引用次数: 5

Bipolar plates and flow field topologies for the regenerative fuel cell 再生燃料电池的双极板和流场拓扑结构

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072055

P. V. Tonder, H. Pienaar

引用次数: 4

Erlang's Ideal Grading in DiffServ modelling Erlang在DiffServ建模中的理想分级

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072139

M. Głąbowski, S. Hanczewski, M. Stasiak

引用次数: 27

Improvements on the Application Triggering Architecture for the IP Multimedia Subsystem IP多媒体子系统应用触发体系结构的改进

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072156

R. Spiers, N. Ventura, T. Magedanz

{"title":"Improvements on the Application Triggering Architecture for the IP Multimedia Subsystem","authors":"R. Spiers, N. Ventura, T. Magedanz","doi":"10.1109/AFRCON.2011.6072156","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072156","url":null,"abstract":"Initial Filter Criteria (iFC) are currently used in the IP Multimedia Subsystem (IMS) to control how services are invoked. They form the core of the current Application Triggering Architecture (ATA) and are transferred to the Serving Call Session Control Function (S-CSCF) to be executed. They are statically configured by the network operator to follow a certain order depending on the initial service request sent by an end user. The S-CSCF forwards on the SIP message repeatedly to different Application Servers (AS) in a chained manner to execute each service identified by the list of iFC. This paper aims to examine deficiencies in this approach and provides a new architecture that will allow the end user to modify and control the flow of particular services. This is done through the addition of a Context Server (CS), a Service Capability Interaction Manager (SCIM), a User Service Policy Server (USPS) as well as a Service Repository Server (SRS). The modifications increase the flexibility of the architecture, allowing contextual decision to be made as well as allowing the end user to customise their service usage. This results in previously impossible use case scenarios completing successfully.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121638206","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: 1

Network transient responses to varying HVAC line length along a HVDC transmission corridor 沿高压直流输电走廊变化HVAC线路长度的网络暂态响应

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072157

D. Oyedokun, K. Folly

引用次数: 2

Model predictive control of a flying capacitor converter with output LC filter for UPS applications 带输出LC滤波器的飞电容变换器的模型预测控制

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6071966

P. Stolze, D. D. Toit, M. Tomlinson, R. Kennel, T. Mouton

引用次数: 10

Power optimization of wireless sensor networks at design time 无线传感器网络在设计时的功率优化

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072079

J. Wenninger, Javier Moreno, Jan Haase

引用次数: 3

Assessment of voltage stability limits calculated using component-based load models in the KwaZulu-Natal transmission network 在夸祖鲁-纳塔尔省输电网中使用基于组件的负荷模型计算的电压稳定限值的评估

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072023

H. Kgasoane, N. Mbuli, Dumisani Mtolo

{"title":"Assessment of voltage stability limits calculated using component-based load models in the KwaZulu-Natal transmission network","authors":"H. Kgasoane, N. Mbuli, Dumisani Mtolo","doi":"10.1109/AFRCON.2011.6072023","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072023","url":null,"abstract":"The operation of power systems has become very difficult due the fact that they are operated very close to their operating limits. In order to accurately take into account this uncertainty related to power system operation, component based load model parameters will be utilized to objectively conduct voltage stability studies. Eskom usually utilizes constant power models when conducting power system analysis, for both steady state and stability studies. The steady state results obtained in this situation represent a conservative picture (i.e., for loadflows and voltage stability). In the case of stability studies, the results obtained may not be reflective of the actual system being studied. The basis of the approach is that the correct modelling of power system loads will result in the computation of representative voltage stability margins for the system. In this paper, work is presented on how more representative load models yield the correct approximation of the voltage stability margin. The transfer capability of the system for constant power, constant impedance, and constant current are compared to those of component based models under normal operating condition and when subjected to n−1 contingencies.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124382506","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: 0