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Fast Anytime Fuzzy Frequency Estimation of Multisine Signals

Fast Anytime Fuzzy Frequency Estimation of Multisine Signals

引用

2008 IEEE Instrumentation and Measurement technology Conference (I2MTC 2008), vol.2

作者： Annamaria R. Varkonyi-Koczy Department of Measurement and Information Systems Integrated Intelligent Systems Japanese-Hungarian Laboratory Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The determination of the frequencies of a multisine signal can be very important at different signal processing tasks, like vibration measurements and active noise control related to rotating machinery and calibration equipment. Adaptive Fourier Analyzers have been developed for measuring periodic signals with unknown or changing fundamental frequency. Higher frequency applications have limitations since the computational complexity of these analyzers are relatively high as the number of harmonic components to be measured (or suppressed) is usually above 50. Recently, a fast-filter bank structure has been proposed for Adaptive Fourier Analysis based on the combination of the concept of transform domain signal processing and the adaptation of a simple linear combiner. It results in the reduction of the above computational complexity, however for the correct use we have to have pre-estimation about the range of the fundamental frequency to be able to set the applied single-input multiple-output filter-banks, which in many cases causes significant and possibly non-tolerable delay in the operation. In this paper, a new fast fuzzy logic supported anytime frequency range estimation procedure is proposed which makes possible to execute the frequency estimation after one quarter of the period of the unknown signal, i.e. the adaptation and Fourier Analysis can be performed without any delay.

关键词： Frequency estimation multisine signal Adaptive Fourier Analysis transformed domain digital signal processing anytime systems fuzzy sets DFT FFT

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Hand-Gesture and Facial-Expression Human-Computer Interfaces for Intelligent Space Applications

Hand-Gesture and Facial-Expression Human-Computer Interfaces...

引用

2008 IEEE International Workshop on Medical Measurements and Applications (MeMeA 2008)

作者： Qing Chen Marius D. Cordea Emil M. Petriu Thomas E. Whalen Imre J. Rudas Annamaria Varkonyi-Koczy University of Ottawa ONT Canada Cray Research Inc. Ottawa ONT Canada Budapest Technology Polytechnical Institution Hungary Budapest University슠of슠Technology슠and슠Economics Hungary

The paper discusses two body-language human-computer interaction modalities, namely the hand gesture and facial expression, for intelligent space applications such as elderly care and smart home applications.

关键词： Human-computer interface Hand gesture Face expression Intelligent space

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Linear and fuzzy control solutions for a laboratory Anti-lock Braking System

Linear and fuzzy control solutions for a laboratory Anti-loc...

引用

International Symposium on Intelligent Systems and Informatics (SISY)

作者： M.-B. Radac R.-E. Precup S. Preitl J.K. Tar E.M. Petriu Department of Automation and Applied Informatics Polytechnic슠University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Budapest Hungary School of Information Technology and Engineering University of Ottawa Ottawa Canada

Three slip controllers are designed and implemented on an anti-lock braking system (ABS), a PI controller, one SISO fuzzy controller without dynamics and a PI-fuzzy one. The system is highly nonlinear. The design approaches are based on system modeling and identification and knowledge from experiments. The controllers are based on the local linearization of the controlled plant and the use of fuzzy control in terms of the modal equivalence principle. The simplicity of design and implementation is highlighted by real-time experiments.

关键词： Fuzzy control Laboratories Wheels Pressure control Control systems Linear feedback control systems Cascading style sheets Acceleration Tires Design engineering

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Fast algorithms for computing parsimonious estimates of QoS measures

Fast algorithms for computing parsimonious estimates of QoS ...

引用

International Symposium on Communications and Information Technologies (ISCIT)

作者： Zalan Heszberger Jozsef Biro Vilmos Nemeth Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

In recent publications concerning quality of service (QoS) measures in communication networks several attempts have been made to improve the techniques of computing or estimating the quality of data transfer. Many of the promising results are based on the knowledge of only very few parameters on the traffic situation, some of which are known a priory, others are measured. The paper deals with such parsimonious estimation techniques of QoS measures under the bufferless fluid flow multiplexing (bffm) framework, and concentrates on the efficient computation of them. The proposed fixed-point recursive algorithms are actively used to put the implicit formulae or ones containing optimization tasks into real-time environment.

关键词： Quality of service Telecommunication traffic Traffic control Aggregates Fluid flow Capacity planning Bandwidth Computer networks Telecommunication computing Communication networks

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Mapping external functionalities into autonomic services

Mapping external functionalities into autonomic services

引用

Bio-Inspired Models of Network, Information and Computing Systems, BIONETICS

作者： Borbala Katalin Benko Robert Schulcz Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

ISBN: (纸本)9781424436491;9789639799059

In this paper, we present the functionality mapping model that is used in the CASCADAS ACE model: external code libraries are transformed into services of an autonomic element. CASACDAS is an EU 6 th Framework IST-FET project in the field of situated, autonomic communication; various research topics are organized around a common abstraction called Autonomic Communication Element (ACE). When designing this common abstraction, a big challenge is to define a natural, non-complex but flexible and expressive way for transforming existing code (libraries) into autonomic services of an ACE. In this paper, we introduce, explain, and discuss the developed model, and compare them with existing functionality mapping technologies.

关键词： Logic gates Biological system modeling Libraries XML Containers Java economics

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Testing Interface Thermal Resistance

Testing Interface Thermal Resistance

引用

Electronics Packaging technology Conference (EPTC)

作者： Marta Rencz Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The paper presents some recent trends in TIM material development, and outlines the state of the art in testing interface thermal resistance values. After presenting the trends in TIM material development first the available experimental techniques are presented shortly, and then the currently available industrial methods are discussed with more details. The paper finally presents some promising developments in finding better resolution high throughput methods to solve the challenging problem of measuring very small thermal resistance values in electronics applications.

关键词： Thermal resistance Electronic packaging thermal management Thermal conductivity Conducting materials Materials testing Semiconductor materials Resistance heating Heat transfer Integrated circuit packaging Thermal factors

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Application of Nonlinear Dynamics in Power Electronics

Application of Nonlinear Dynamics in Power Electronics

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Istvan Nagy Budapest University슠of슠Technology슠and슠Economics Hungary

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Model based torque estimation of Permanent Magnet Synchronous Machines

Model based torque estimation of Permanent Magnet Synchronou...

引用

IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)

作者： Andras Zentai Tamas Daboczi Budapest University슠of슠Technology슠and슠Economics Hungary

This paper reports advances in model based machine torque estimation used in electronic power assisted steering systems. Using machine input voltages the permanent magnet synchronous machine internal states and the output torque can be estimated. This technique can be used to detect machine failures and also can be used to verify the failure of the machine current measurement sensors.

关键词： Permanent magnet machines Power system modeling Torque measurement Pulse width modulation Safety Inductance Current measurement Automotive engineering Costs Sensor systems

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Testbed of a Novel Media Streaming Architecture for Heterogeneous Wireless Environment

Testbed of a Novel Media Streaming Architecture for Heteroge...

引用

International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TRIDENTCOM)

作者： Laszlo Bokor Laszlo Lois Csaba A. Szabo Sandor Szabo Department of Telecommunications Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The paper presents the testbed of a novel network architecture which aims at providing streaming media services in a heterogeneous environment where the subscribers are roaming among different wired/wireless access networks including ADSL, WiFi, 2.5G and 3G cellular and WiMAX. The architecture provides seamless connectivity during roaming, with adapting the quality of the delivered media stream to the changes of the network characteristics and to the capabilities of a wide variety of devices. The paper presents general design considerations, focuses on a novel vertical handover mechanism, its implementation and evaluation in the testbed, as well as discusses media processing aspects. The different subsystems are currently being integrated into a single testbed which will provide an open environment for experimentation and will be suitable for technology transfer to network service providers and content providers.

关键词： Streaming media Testing Nonhomogeneous media Wireless networks Roaming Quality of service Wireless LAN Paper technology Environmental economics Cellular networks

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Enhanced Mobility Management Modelling Framework

Enhanced Mobility Management Modelling Framework

引用

Computer Information Systems and Industrial Management Applications (CISIM)

作者： Peter Fulop Benedek Kovacs Department of Telecommunications Budapest University슠of슠Technology슠and슠Economics Hungary Department of Mathematical Analysis Budapest University슠of슠Technology슠and슠Economics Hungary

This paper investigates mobility management strategies from the point of view of their need of signalling and processing resources on the backbone network and load on the air interface. A method is proposed to model the serving network and mobile node mobility in order to be able to model the different types of mobility management algorithms. To obtain a good description of the network we calculate parameters from given topologies that we think are the most important ones. Mobility approaches derived from existing protocols and other, possible mobility scenarios are analyzed and their performance is numerically compared in various network and mobility scenarios. The aim is to give general designing guidelines for the next generation mobility managements on given network and mobility properties.

关键词： Mobile radio mobility management Access protocols Signal processing Guidelines Mathematical model Mathematical analysis Spine Telecommunication network topology Performance analysis Next generation networking

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