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Simulation for image traffic sensor in malaysia traffic dilemma control systems

Simulation for image traffic sensor in malaysia traffic dile...

Asian Simulation Conference 2005, ASC 2005 and the 6th international Conference on System Simulation and Scientific Computing, ICSC 2005

作者： Nadiah, Hanim Mohd, Nazmi Takaba, Sadao Department of Computer Science Graduate School Tokyo University of Technology Japan Department of Electrical and Computer Engineering International Islamic University Malaysia Malaysia School of Computer Science Tokyo University of Technology Japan

This paper focuses on the method used for traffic control system in dilemma-zone detection. Our research systems based on a general purpose of minimizing the probability for accident that resulted from signal phase termination especially at night. This objective is accomplished by using image detectors to monitor vehicle existence in the dilemma zone and then extending the phase until the dilemma zone is cleared or until a maximum green is reached. The systems described have additional objectives that are intended to provide other safety or operational benefits. Arena simulations are used to determine the existence of vehicle in the dilemma zone. Our main goal is to instruct drivers' decision while approaching the intersection by using the traffic signal control.

关键词： Online systems

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Simulation and evaluation for decentralized signal control on four intersections in Malaysia traffic systems

Simulation and evaluation for decentralized signal control o...

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Asian Simulation Conference 2005, ASC 2005 and the 6th international Conference on System Simulation and Scientific Computing, ICSC 2005

作者： Mohd, Nazmi Nadiah, Hanim Takaba, Sadao Department of Electrical and Computer Engineering International Islamic University Malaysia Malaysia Department of Computer Science Graduate School Tokyo University of Technology Japan School of Computer Science Tokyo University of Technology Japan

This research is to propose and develop the new signal control system which is to be integrated into Malaysia Traffic System. The control system obtains information from image detectors which are installed inside the intersection;predict the future traffic flows at various levels and conditions. A dynamic network system could capture the problem of the network traffic congestions, estimates the information on each particular link (neighboring intersection), in terms of vehicles flow and traffic can be calculated. Referring to the network flow control, the information data let the system to set the parameter itself then allow the system to allocate green time for each different demand pattern and each phase. These decisions are determined not at a central system but at the intersection control system. Simulation is done to find any difficulty of the system.

关键词： Control systems

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Selfish routing with incomplete information 05

Selfish routing with incomplete information

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Seventeenth Annual ACM Symposium on Parallelism in Algorithms and Architectures

作者： Gairing, Martin Monies, Burkhard Tiemann, Karsten Faculty of Computer Science Electrical Engineering and Mathematics University of Paderborn Fürstenallee 11 33102 Paderborn Germany International Graduate School of Dynamic Intelligent Systems

ISBN: (纸本)9781581139860

In his seminal work Harsanyi [13] introduced an elegant approach to study non-cooperative games with incomplete information where the players are uncertain about some parameters. To model such games he introduced the Harsanyi transformation, which converts a game with incomplete information to a strategic game where players may have different types. In the resulting Bayesian game players' uncertainty about each others types is described by a probability distribution over all possible type profiles. In this work, we introduce a particular selfish routing game with incomplete information that we call Bayesian routing game. Here, n selfish users wish to assign their traffic to one of m links. Users do not know each others traffic. Following Harsanyi's approach, we introduce for each user a set of possible types. This paper presents a comprehensive collection of results for the Bayesian routing game. We prove, with help of a potential function, that every Bayesian routing game possesses a pure Bayesian Nash equilibrium. For the model of identical links and independent type distribution we give a polynomial time algorithm to compute a pure Bayesian Nash equilibrium. We study structural properties of fully mixed Bayesian Nash equilibria for the model of identical links and show that they maximize individual cost. In general there exists more than one fully mixed Bayesian Nash equilibrium. We characterize the class of fully mixed Bayesian Nash equilibria in the case of independent type distribution. We conclude with results on coordination ratio for the model of identical links for three social cost measures, that is, social cost as expected maximum congestion, sum of individual costs and maximum individual cost. For the latter two we are able to give (asymptotic) tight bounds using our results on fully mixed Bayesian Nash equilibria. To the best of our knowledge this is the first time that mixed Bayesian Nash equilibria have been studied in conjunction with social cost. C

关键词： Game theory

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A formal approach for component based embedded software modelling and analysis

A formal approach for component based embedded software mode...

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IEEE international Symposium on Industrial Electronics 2005, ISIE 2005

作者： Almeida, Hyggo Oliveira Dias Da Silva, Leandro Oliveira, Elthon Perkusich, Angelo Federal University of Campina Grande Department of Electrical Engineering Campina Grande Paraiba Brazil Federal University of Campina Grande Graduate Program in Computer Science Campina Grande Paraiba Brazil

ISBN: (纸本)0780387384

To develop software for embedded systems the designer must take into account different kinds of problems and complexities. The main issues are related to late integration with the target hardware and the separation of the development environments from target execution platforms. Due to the fact that in most situations they are developed using low-level programming languages, approaches to develop complex software systems, such as component based software development, cannot be used at all. In this work we introduce a component based development process that integrates colored Petri nets and a component model in order to introduce better abstraction mechanisms in the modelling, analysis and verification processes for embedded software systems. ©2005 IEEE.

关键词： Embedded systems

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Data-aided SIR measurement for closed loop fast TPC suitable for W-CDMA with closed loop transmit diversity

Data-aided SIR measurement for closed loop fast TPC suitable...

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7th IEEE international Conference on Personal Wireless Communications, ICPWC 2005

作者： Priantoro, Akhmad Unggul Mohamad, Masrul Faizal Okada, Minoru Yamamoto, Heiichi Department of Electrical and Computer Engineering International Islamic University Malaysia Jalan Gombak 53100 Kuala Lumpur Malaysia Graduate School of Information Science Nara Institute of Science and Technology 8916-5 Takayama Ikoma Nara 630-0192 Japan

This paper investigates the effect of signal-to-interference ratio (SIR) measurement accuracy exploiting data modulated symbols in SIR-based fast closed loop transmit power control (TPC) considering the application of closed loop transmit diversity mode 1 in wideband code division multiple access (W-CDMA) system. SIR measurement is performed after removing the random data modulation so as to maximize the instantaneous received power. computer simulation results clarify the advantage of data-aided SIR measurement even in the presence of feedback information (FBI) errors. Further, we also clarified that exploiting data symbols in addition to DPCH pilot symbols exhibits better performance. The data-aided SIR measurement technique is an add-on functionality to the standardized user equipment (UE) so that the adoption shall not affect the operation of commercial systems. © 2005 IEEE.

关键词： Code division multiple access

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Simulation for Image Traffic Sensor in Malaysia Traffic Dilemma Control Systems

Simulation for Image Traffic Sensor in Malaysia Traffic Dile...

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Asian Simulation Conference/The 6th international conference on system Simulation and Scientific Computing

作者： Nadiah Hanim Mohd Nazmi Sadao TAKABA Graduate Student Department of Computer Science Graduate School Tokyo University of Technology Lecturer Department of Electrical and Computer Engineering International Islamic University Malaysia Professor School of Computer Science Tokyo University of Technology

关键词： Dilemma Zone, Sensing Technology, System Control Online System and Simulation

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Simulation and Evaluation for Decentralized Signal Control on Four Intersections in Malaysia Traffic Systems

Simulation and Evaluation for Decentralized Signal Control o...

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Asian Simulation Conference/The 6th international conference on system Simulation and Scientific Computing

作者： Mohd Nazmi Nadiah Hanim Sadao TAKABA Lecturer Department of Electrical and Computer Engineering International Islamic University Malaysia Graduate Student Department of Computer Science Graduate School Tokyo University of Technology Professor School of Computer Science Tokyo University of Technology

关键词： Decentralized Intersection, Signal Control System, Traffic Flows, Simulation System, Real-time Network

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Modeling of spatially periodic dielectric sensors in the presence of a top ground plane bounding the test dielectric

Modeling of spatially periodic dielectric sensors in the pre...

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作者： Sheiretov, Y. Zahn, M. JENTEK Sensors Inc. 110-1 Clematis Ave. Waltham MA 02451-7013 United States Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 United States Eta Kappa Nu Honor Society Department of Electrical Engineering MIT MIT Course VI-A Electrical Engineering Computer Science Internship Program Liquid Dielectrics Committee International Advisory Committee International Conference on Dielectric Liquids

Semi-analytical models are used to simulate the response of periodic-field electro quasistatic dielectrometry sensors. Due to the periodic structure of the sensors it is possible to use Fourier series methods in combination with collocation point numerical techniques to generate accurate sensor simulations much more efficiently than with the more general finite-element methods. Previously, collocation-point models used to compute the response of periodic field dielectric sensors, also known as Interdigitated Electrode Dielectrometers (IDED), have ignored the contribution of the constant (zero-order) term in the Fourier series expansion of the physical quantities. This is justifiable if the top dielectric material layer under test is infinitely thick, with any top ground plane bounding the dielectric removed too far from the sensor to influence its response. This is the assumption generally made until now in the application of these models. In practice, however, it is impossible to eliminate the cumulative effect of objects at ground potential in the vicinity of the sensor, which in general manifests itself as a ground plane electrode positioned at some effective distance within the top dielectric layer (usually air). In order to eliminate this source of uncertainty in the measurements, we suggest that a grounded electrode be explicitly placed at the top of the dielectric layer in the experimental setup, and its presence be accounted for in the models. Furthermore, in many cases, such as measurements on ceramic thermal barrier coatings, a metal layer is already present behind the material under test. In this paper we present how the models must be modified to account for this ground plane, and what effect it has on the dependence of the sensor response on the material properties. For example, the sensor transcapacitance may no longer be a monotonically increasing function of the material's permittivity, leading to nonuniqueness in permittivity measurements, as some f

关键词： Dielectric devices

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Wireless hearing aid system simulations using advanced design system™: A behavioral modeling approach

Wireless hearing aid system simulations using advanced desig...

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2005 27th Annual international Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Rana, Ram Singh Tang, Bin Zhang, Liang Krishna, Garg Hari Wang, Yun Institute of Microelectronics Singapore Science Park II 11 Science Park Road Singapore 117685 Singapore Graduate Program in Bioengineering National University of Singapore Singapore 117597 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 119260 Singapore Department of Otolaryngology Faculty of Medicine National University of Singapore Singapore 119074 Singapore

ISBN: (纸本)0780387406

The stringent requirements on size and power consumption constrain the conventional hearing aid devices from providing the patients an economic and user friendly solution, specifically for better noise cancellation. With the advancements in technologies such as integrated circuits design, wireless communications and digital signal processing techniques, the wireless hearing aids having multi-microphones, analog, digital and mixed signals and radio frequency signals processing circuits, DSP and programmable units seem to be promising to provide enhanced performance. The focus of this paper is about the system simulation of a typical wireless hearing aid using Agilent Advanced Design System™. The behavioral modeling features are exploited to enable the whole system simulations including electro-acoustic transducers. A few system level simulation results are included. © 2005 IEEE.

关键词： Hearing aids

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Transistor characteristics of thermal chemical vapor deposition carbon nanotubes field emission triode

Journal of Vacuum Science & Technology B: Microelectronics a...

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Journal of Vacuum science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena 2005年第2期23卷 868-873页

作者： Y. M. Wong W. P. Kang J. L. Davidson W. Hofmeister S. Wei J. H. Huang Department of Electrical Engineering and Computer Science Vanderbilt University Nashville Tennessee 37235 Interdisciplinary Graduate Program in Material Science Vanderbilt University Nashville Tennessee 37235 Department of Materials Science and Engineering National Tsing Hua University Hsinchu 300 Taiwan Republic of China

A study of thermal chemical vapor deposition (CVD) grown carbon nanotubes (CNTs) field emitters in a triode amplifier configuration is reported. The CNT transistor characteristics were examined by integrating gate and anode with CNT cathode in two structural forms, utilizing a TEM grid (transmission electron microscope specimen holder) as the gate electrode and a micropatterned CNT with self-aligned gate. The TEM-grid CNT triode displayed clearly gate-controlled current modulation behavior with distinct cutoff, linear, and saturation regions, and a reasonable gate turn-on field of ∼5.4V∕μm despite a large cathode-gate spacing of ∼120μm . The field emission result established the basic transistor characteristics of CNTs in a triode configuration. A CNT triode construct with a self-aligned gated fabrication technique was also developed to realize a monolithic triode structure with shorter gate-cathode spacing, lowering gate voltage, and enhancing emission current. The triode exhibited a significantly lower gate turn-on voltage of ∼40V , and gate-controlled modulation of the emission current. An anode current density of ∼30mA∕cm2 was achieved at a gate voltage of ∼80V and an anode voltage of ∼200V . The dc characteristics for both of the CNT triodes were investigated, including Ia versus Va for different Vg . Moreover, dc parameters such as transconductance, amplification factors, and anode resistance of the triode amplifier were determined. The CNT triodes exhibited useful amplification factor and high output impedance.

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