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Proceedings of Southcon '95最新文献

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Square spiral microstrip antennas: analysis for different sizes and substrate parameters using a personal computer 方形螺旋微带天线:用个人计算机分析不同尺寸和衬底参数
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516131
J. Ely, C. Christodoulou, D. Shively
{"title":"Square spiral microstrip antennas: analysis for different sizes and substrate parameters using a personal computer","authors":"J. Ely, C. Christodoulou, D. Shively","doi":"10.1109/SOUTHC.1995.516131","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516131","url":null,"abstract":"It is demonstrated that the design of a square spiral microstrip antenna can be specified with only 4 parameters. Some details of a method of moments analysis technique are presented. Two test cases are presented to compare the performance of square spiral microstrip antennas of different winding densities. Either design could be advantageous depending upon the application. Finally, it is shown that such computations are within the reach of PCs.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125005384","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
Feedback congestion controller for ATM networks using a neural network traffic predictor 基于神经网络流量预测器的ATM网络反馈拥塞控制器
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516137
Yao-Ching Liu, C. Douligeris
{"title":"Feedback congestion controller for ATM networks using a neural network traffic predictor","authors":"Yao-Ching Liu, C. Douligeris","doi":"10.1109/SOUTHC.1995.516137","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516137","url":null,"abstract":"One of the fundamental challenges facing broadband information transport is to determine congestion control strategies to support multiple classes of traffic in the asynchronous transfer mode (ATM) based networks. Monitoring the buffer status is the most commonly used mechanism to detect congestions in ATM networks. However, in static feedback controllers defining the threshold of the buffer for congestion is not so direct and the degree of source rates to be regulated is not so clear, either. In this paper, we propose an explicit congestion mechanism for ATM networks using an artificial neural network to predict the traffic arrival patterns. The predicted data rate in conjunction with the current queue information of the buffer is used to generate a value that will inform the source to reduce its transmission rate. The results of a simulation study are presented which suggest that our mechanism provides a simple and effective traffic management for ATM networks. Cell loss due to congestion shows a 5 to 10 times improvement compared with the static approach. Transmission delay of our ANN controller is also smaller.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121267822","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: 3
Boost derived DC-to-AC converter with zero voltage switching 具有零电压开关的升压衍生dc - ac变换器
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516077
K. Siri, J. Banda, A. Khan, I. Batarseh
{"title":"Boost derived DC-to-AC converter with zero voltage switching","authors":"K. Siri, J. Banda, A. Khan, I. Batarseh","doi":"10.1109/SOUTHC.1995.516077","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516077","url":null,"abstract":"In this paper, we present a single-ended DC-to-AC converter with zero voltage switching and output isolation. It is a current fed converter having variable frequency control to get symmetrical regulated AC output. The transformer provides electrical output isolation. Two switches operating in complementary fashion control the operation of the converter and provide transformer core resetting. The resonance of the parasitic capacitances with the magnetizing inductance of the transformer and output side inductor causes zero voltage switching for both switches in order to reduce switching losses. The output has an LCC resonant tank circuit which controls the power flow and shape of the output AC voltage. Steady state equations are presented and basic circuit operation is explained. Simulation results verifying the theoretical waveforms are also presented.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121986424","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
Developing a high efficiency means of propulsion for underwater vehicles 开发一种高效的水下航行器推进方式
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516129
G. Kennedy, J. K. Holt
{"title":"Developing a high efficiency means of propulsion for underwater vehicles","authors":"G. Kennedy, J. K. Holt","doi":"10.1109/SOUTHC.1995.516129","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516129","url":null,"abstract":"Harbor Branch Oceanographic Institution's Engineering Division has developed and patented a highly efficient ring thruster for underwater vehicle propulsion. This brushless electric propulsion device has no seals or motor pressure housings, simplifying maintenance under operating conditions. Light weight and reliability are other design criteria for Harbor Branch's manned submersibles, ROVs and AUVs. Design, performance and applications are described as well as the results of testing for thrust, efficiency, bearing life, and flow patterns with several propeller blade configurations. A counter-rotating unit is under development.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122641253","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: 9
Intelligent peripheral modules for microcontrollers 用于微控制器的智能外围模块
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516083
C. Melear
{"title":"Intelligent peripheral modules for microcontrollers","authors":"C. Melear","doi":"10.1109/SOUTHC.1995.516083","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516083","url":null,"abstract":"The modular concept of microcontroller design provides the means whereby each module can have it's own local microengine or state machine. The main CPU communicates with the modules through dual access memory, issuing commands to semi-intelligent state machines or writing directly to registers in the module. Once a module has been given a command sequence, the peripheral can act autonomously from the CPU. With several modules working at the same time, the effect of running multiple instructions per clock cycle can be obtained. In other words, a timer module can be performing some task while the CPU is executing an unrelated algorithm.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131030693","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
@nePgy Efficient DSP Architectures for VSELP Speech Coder 用于VSELP语音编码器的高效DSP架构
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516099
Zhenzhong Gu, R. Sudhakar, E.K.B. Lee
{"title":"@nePgy Efficient DSP Architectures for VSELP Speech Coder","authors":"Zhenzhong Gu, R. Sudhakar, E.K.B. Lee","doi":"10.1109/SOUTHC.1995.516099","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516099","url":null,"abstract":"One of the primary objectives in the design of digital portable radio is power reduction required to maximize run time and minimize battery size and weight. Available power saving strategies such as dynamic power level control and discontinuous transmission are limited in their scope. A more effective approach is to operate the processors at the lowest supply voltage without incurring reduction in the throughput. Parallel architecture utilizing pipelining and parallelism through hardware duplication can be used to maintain throughput at lower voltages, by allowing slower device speeds. In the paper, several parallel/pipelined implementations of a VSELP speech coder employing VSELP algorithm modifications are suggested and are assessed for the power saving-voice quality trade-off.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132873409","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
Negative feedback control design for a PWM-buck converter pwm降压变换器的负反馈控制设计
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516078
S. Razvi, I. Batarseh, Z. Qu
{"title":"Negative feedback control design for a PWM-buck converter","authors":"S. Razvi, I. Batarseh, Z. Qu","doi":"10.1109/SOUTHC.1995.516078","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516078","url":null,"abstract":"This paper uses a conventional pulse width modulator (PWM) control method to design a negative feedback controller for the PWM-buck converter. The main objective in using the conventional control is to design a stable compensator in the closed loop to provide stability and improve the performance for the power supply for the parameter variations, load changes, and the equivalent series resistance (ESR) effects. This is done by adding a compensator in the feedback loop of the switching power supply. The performance of the PWM-buck converter is improved. The simulation program PSPICE is used to verify the theoretical analysis of the converter.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115326810","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
Design of distance learning presentations 远程学习演示的设计
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516093
J. Story
{"title":"Design of distance learning presentations","authors":"J. Story","doi":"10.1109/SOUTHC.1995.516093","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516093","url":null,"abstract":"That interactive distance learning (IDL) is becoming more and more popular is a fact; but the effort required to design and present an effective IDL course is almost a \"trade secret\". Like most tasks, the time and energy that one spends can vary from little to tremendous; so the aim of this paper is to outline the middle ground, and discuss the differences between traditional course and IDL preparations. For purposes of this paper, IDL is based on a system that allows students who are physically separated from the teacher, to interact in real time through both video and audio. This is a high-end system that requires a lot of design time.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122342122","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
Photovoltaic powered highway camera surveillance system 光伏供电高速公路摄像监控系统
Proceedings of Southcon '95 Pub Date : 1995-03-07 DOI: 10.1109/SOUTHC.1995.516130
W. Young
{"title":"Photovoltaic powered highway camera surveillance system","authors":"W. Young","doi":"10.1109/SOUTHC.1995.516130","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516130","url":null,"abstract":"Energy from the Sun is being used to power numerous applications; from hot water in the home to powering an electric car. One form of solar energy supplies power by photovoltaic cells that converts sunlight to electrical energy. This energy is used to power a variety of electrical devices. One sector of the transportation industry provides various highway safety equipment which requires various forms of electrical power to operate along roadways. One such device is a closed-circuit television system which provides surveillance capabilities on highways. Most installations are near utility power, but a few are in remote locations without electric power. The author describes how photovoltaic (PV) power systems are capable of providing the needed electrical power for various transportation devices, including surveillance television systems. He details how, as a demonstration, a PV system was designed and constructed to power a camera surveillance system on an expressway in Florida, USA.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126816516","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
Reducing development time and cost through effective project management 通过有效的项目管理减少开发时间和成本
Proceedings of Southcon '95 Pub Date : 1900-01-01 DOI: 10.1109/SOUTHC.1995.516108
D. Soldano
{"title":"Reducing development time and cost through effective project management","authors":"D. Soldano","doi":"10.1109/SOUTHC.1995.516108","DOIUrl":"https://doi.org/10.1109/SOUTHC.1995.516108","url":null,"abstract":"The more complex a development effort the more difficult it is to reduce or control the project's schedule and cost. The use of concurrent engineering in the development cycle only exacerbates the problem by increasing the number of departments and people involved at any point in the development effort. Breakdowns in the process can have devastating effects on the project schedule and double or even triple the development cost. These project elements can be effectively controlled using proven project management techniques. A number of companies involved in complex development efforts have been able to greatly reduce both development time and cost by applying these techniques.","PeriodicalId":341055,"journal":{"name":"Proceedings of Southcon '95","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127753841","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
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