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Real-time flow data analysis by GIS: Internet and WAP approach

Real-time flow data analysis by GIS: Internet and WAP approa...

引用

International Conference on Intelligent Transportation

作者： I. Fi A. Barsi T. Lovas Z. Siki G. Fordos Department of Highway and Railway Engineering Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Photogrammetry and Geoinformatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Geodesy and Surveying Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Control Engineering and Information Technology Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

Due to the heavy traffic, people living in urban areas have to get used to congested roads, increased traveling time, and stressful situations. There is a strong demand on acquiring real-time flow data on actual traffic and road conditions. Our paper presents a method on acquiring several traffic data from different data sources, such as induction loop sensor data (vehicle volume, average flow speed, road occupancy), traffic monitoring video camera images, position data of the public transport vehicles and cabs, digital database of road construction areas. A technique to combine and analyze them in sophisticated GIS (Geographic Information System) environment is also presented in the paper. Our method involves state-of-the-art multimedia communication applications, including Internet and cell-phone based JAVA Mobile Edition systems. The actual flow information are represented in easy-to-understand color-coding on the maps.

关键词： Data analysis Geographic Information Systems Internet Road vehicles Urban areas Image sensors Digital cameras Image databases Information analysis Multimedia communication

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An Internet course for teaching basic MEMS technologies and applications: MEMSEdu

An Internet course for teaching basic MEMS technologies and ...

引用

Electronic Components and technology Conference (ECTC)

作者： G. Harsanyi P. Bojta P. Gordon H. Santha Department of Electronics Technology Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

Conventional teaching methods, based on lectures, static written materials, laboratories, etc., have become rather difficult at all levels of MST (microsystems technologies) education, recently. To supply this field with well-educated engineers with interdisciplinary knowledge, it is necessary to teach them basic sciences, technology, applications, and designing aspects (reliability, packaging, etc.) belonging to the topic of MST. Also the knowledge of user engineers should be upgraded-possibly in a form of distance learning. The main objective of the described project here is the development of a multimedia supported education material that teaches/overviews the theoretical background, manufacturing, as well as practical application of microelectronics, microelectro/opto/mechanical systems and their packaging technologies in order to prepare experts for designing next generation intelligent micro/nanointegrated systems in the new century. The new approach tries to exploit all advantages of multimedia computer aided teaching not only for keeping the competitiveness but also in order to overcome the specific difficulties of the particular area. The modern educational software tool can secure up to date information, easy-to-understand visualisation of the 3D MEMS structures and interactive examples of the subject. The course material will be available both on the Internet and on CDs for the technical community, for other university professors for teaching, and also will continuously be developed.

关键词： Internet Education Micromechanical devices Educational technology Reliability engineering Knowledge engineering Packaging Laboratories Design engineering Materials science and technology

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Control Flow Support in Metamodel-Based Model Transformation Frameworks

Control Flow Support in Metamodel-Based Model Transformation...

引用

Eurocon

作者： L. Lengyel T. Levendovszky G. Mezei H. Charaf Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

This paper presents the visual control flow support of Visual Modeling and Transformation System (VMTS), which facilitates composing complex model transformations out of simple transformation steps and executing them. The VMTS control flow language (VCFL) uses stereotyped activity diagrams to specify control flow structures and OCL constraints to choose between different control flow branches. In general, a control structure language needs are the sequence, the conditional branch, hierarchism, parallel executions and the iteration. VCFL has all these control structures in a deterministic version

关键词： Object oriented modeling Unified modeling language Power generation economics Formal languages Software design Software systems Software standards Standards development Logic Production

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Transmission Challenges of Cascaded Semiconductor Optical Amplifiers

Transmission Challenges of Cascaded Semiconductor Optical Am...

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International Topical Meeting on Microwave Photonics (MWP)

作者： T. Berceli E. Udvary Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The semiconductor optical amplifier (SOA) is a proper component for simultaneous modulation and amplification what is a good approach for sub-carrier multiplexed optical signal transmission. However, cascading several SOAs a new problem arises, an increase in the distortion due to cross-modulation of the different channels. In the paper an optimum approach is presented to overcome that distortion problem.

关键词： Semiconductor optical amplifiers Optical distortion Stimulated emission Optical devices Optical modulation

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Analysis of Discontinuous PWM Strategies of Three-Level Inverters (II)

Analysis of Discontinuous PWM Strategies of Three-Level Inve...

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International Conference on Power Electronics and Drive Systems (PEDS)

作者： S. Halasz Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

In the area of high voltages and powers, the high quality inverter-fed AC drive is more easily achieved by the use of three-level inverters. For three-level inverters three different PWM control regions can be introduced where different two-phase (discontinuous) PWM strategies may be applied. This paper deals with the analysis of voltage spectra of one discontinuous PWM method of three-level inverters when every 30deg of each fundamental period the one motor phase is clamped to DC bar. The derivation of the analytical equations of motor voltage harmonics for this PWM method is given for both the realizations: with one and with two carrier waves. The comparison of the voltage spectra of the possible PWM methods is presented. It is shown that in the low voltage area the same value of motor harmonic losses are produced for both one and two carrier wave PWM. However, for the high voltage area the harmonic losses associated with the two carrier modulation are usually considerably lower than in case of one carrier method. The two carrier method can be disadvantageous only for low modulation frequency when the low order harmonics reach the sensitive value

关键词： Pulse width modulation inverters Voltage Pulse width modulation DC motors Space vector pulse width modulation Frequency Power generation economics AC motors Drives Equations

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The effect of lead free soldering on formation of black pad failure

The effect of lead free soldering on formation of black pad ...

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International Spring Seminar on Electronics technology

作者： O. Krammer Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

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Analysis of discontinuous PWM strategies of three-level inverters (I)

Analysis of discontinuous PWM strategies of three-level inve...

引用

IEEE International Conference on Industrial technology (ICIT)

作者： S. Halasz Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

In the area of high voltages and powers, the high quality inverter-fed ac drive is more easily achieved by the use of three-level inverters. For three-level inverters three different PWM control regions can be introduced where different two-phase (discontinuous) PWM strategies may be applied. This paper deals with the analysis of voltage spectra of one discontinuous PWM method of three-level inverters when every 60deg of each fundamental period the one motor phase is clamped to dc bar. The derivation of the analytical equations of motor voltage harmonics for this PWM method is given for both realizations: with one and with two carrier waves. The comparison of the voltage spectra of the possible PWM methods is presented. It is shown that in the low voltage area the same value of motor harmonic losses are produced for both one and two carrier wave solutions. However, for the high voltage area the harmonic losses associated with the two carrier modulation are usually considerably lower than in case of one carrier method. The two carrier method can be disadvantageous only for low modulation frequency when the low order harmonics reach the sensitive value

关键词： Pulse width modulation inverters Pulse width modulation DC motors Equations TV Power generation economics Harmonic analysis Low voltage Frequency modulation Space vector pulse width modulation

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Simulation of quantum key distribution with noisy channels

Simulation of quantum key distribution with noisy channels

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International Conference on Telecommunications (ConTEL)

作者： A. Pereszlenyi Department of Telecommunications Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

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Real-time charging in third-generation mobile networks

Real-time charging in third-generation mobile networks

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International Conference on Telecommunications (ConTEL)

作者： B.D. Ary G. Debrei S. Imre Department of Telecommunications Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

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Fuzzy and anytime signal processing approaches for supporting modeling and control of transportation systems

Fuzzy and anytime signal processing approaches for supportin...

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International Conference on Computational Cybernetics (ICCC)

作者： T. Peter Department of Transport Automation Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

Nowadays, in solving control problems, the processing of the information always involves some kind of measurement and signal processing tasks, as well. This fact has pressed experts focus more deeply on modeling and signal processing techniques and to apply non-classical, artificial intelligence, and soft computing based methods to overcome problems arising from the increased complexity of the today's systems. In this paper, the author shows that measurement and signal processing problems of now-a-days open new dimensions for the interpretation of the basic concepts of measurement and signal processing and make the reevaluation of these concepts necessary. Traditional methods fail in many cases to yield useful solutions, especially when measurement and signal processing problems reveal considerable complexity, involve a wide spectrum of various disciplines and require a multitude of components and methods. The paper gives a brief overview of various imprecise computational methods and discusses their applicability to treat complex modeling, signal processing, and control problems.

关键词： Fuzzy control Fuzzy systems Signal processing Control system synthesis Transportation Information processing Artificial intelligence Process control Automatic control Automation

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