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Design of an ethernet based residential security system

Computers in Education Journal 2005年第3期15卷 2-13页

作者： Vaidyanathan, Vijay Hobson, Adam Kamego, Stephen McKean, Jacob Van Allen, Russell Electronics Engineering Technology Program Department of Engineering Technology University of North Texas UNT Research Park 3940 N. Elm Denton TX 7620 Electronics Engineering Technology Program Department of Engineering Technology University of North Texas

Current home alarm systems are quite complicated in that they require the installer to spend large amounts of time for installation or have prior professional installation experience. In addition, programming the system is a non-trivial task and usually requires prior alarm system programming knowledge. This paper explains the design of an ethernet based residential security system that is controlled by a micro-controller and has LabVIEW for user interface. The system is easy to configure and install. The security system offers the same general features of currently available home alarm systems but with potential expandability.

关键词： Security systems

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Web-based real electronics laboratories

Web-based real electronics laboratories

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and technology Education in a Global World

作者： Guran-Postlethwaite, Yolanda Pocock, David N. Dutton, David Electronics Engineering Technology Oregon Institute of Technology United States Electronics Engineering Technology Program OIT Campus Portland OR United States Analog Block Electronics Engineering Technology Department Oregon Institute of Technology Klamath Falls OR United States Graduate School Oregon State University United States

The introduction of web-based real electronics laboratories by Oregon Institute of technology (OIT) is discussed. Two sophomore-level laboratories experiments are available to OIT electronics majors to be run remotely over the the web, namely an operational amplifier (op-amp) lab, and a MOSFET lab. The MOSFET lab is an introductory experiment where the student is expected to measure the common-source ouput characteristics as a function of the input voltage. As the web delivery of laboratory courses will extend to other courses in the program, such as the digital courses, OIT is expected to develop more experiment boards and acquire more hardware systems.

关键词： World Wide Web

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An experimental setup to measure the conductivity of a solid or liquid sample utilizing multi-frequency LCR meter

An experimental setup to measure the conductivity of a solid...

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and technology Education in a Global World

作者： Darayan, Shahryar Department of Engineering Technologies Texas Southern University United States Electronics Engineering Technology Program Texas Southern University United States

A computer-controlled automated data acquisition system is designed to measure the conductivity of the liquid (saline water) or the solid sample (rock saturated with saline water) in the frequency range 10 kHz to 2 MHz. The set-up is based on LCR (Inductor, Capacitor, and Resistor) multimeter and four-terminal sample holder system that was developed to reduce the contact resistance, to minimize any stray capacitance, and residual inductance associated with the test leads or the test fixture at high frequencies. However, the instrumentation calibration scheme cannot completely eliminate the aforementioned errors. In order to accomplish this, a calibration model is designed to compensate for the inherent error of the system. In this study, the conductivity of some samples was measured. The measured data was compared with conductivity provided by Society of Core Analysis Guideline (SCA-GL). The agreement between available data and experimental data is excellent.

关键词： Electric conductivity

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Nonlinear H∞ for spacecraft attitude control

Nonlinear H∞ for spacecraft attitude control

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作者： Shou, Ho-Nien Jan, Ying-Wen Department of Aviation and Communication Electronics Air Force Institute of Technology United States Mechanical Engineering Department National Space Program Office Taiwan

ISBN: (纸本)008045108X

This paper presents a nonlinear H∞ state feedback attitude control design method for spacecraft large angle maneuvers, which is subject to moment-of-inertia (MOI) uncertainty. Moreover, the operation of attitude maneuver is affected by external disturbances. The attitude control design thus employs a nonlinear H∞ method to achieve stability and robustness so that both MOI uncertainty and external disturbances can be accounted for. in the paper, a solution for robust spacecraft attitude control is conjectured and shown to satisfy the nonlinear H∞ criterion. This results in a nonlinear H∞ control law that is capable of robustly stabilizing the maneuver in the presence of external disturbance and spacecraft inertia uncertainty. The simulation results are presented to demonstrate the effectiveness of the proposed design method. Copyright © 2005 IFAC.

关键词： Attitude control

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NONLINEAR H ∞ FOR SPACECRAFT ATTITUDE CONTROL

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IFAC Proceedings Volumes 2005年第1期38卷 49-54页

作者： Ho-Nien Shou Ying-Wen Jan Department of Aviation & Communication Electronics Air Force Institute of Technology Mechanical Engineering Department National Space Program Office

This paper presents a nonlinear H ∞ state feedback attitude control design method for spacecraft large angle maneuvers, which is subject to moment-of-inertia (MOI) uncertainty. Moreover, the operation of attitude maneuver is affected by external disturbances. The attitude control design thus employs a nonlinear H ∞ method to achieve stability and robustness so that both MOI uncertainty and external disturbances can be accounted for. In the paper, a solution for robust spacecraft attitude control is conjectured and shown to satisfy the nonlinear H ∞ criterion. This results in a nonlinear H ∞ control law that is capable of robustly stabilizing the maneuver in the presence of external disturbance and spacecraft inertia uncertainty. The simulation results are presented to demonstrate the effectiveness of the proposed design method.

关键词： moment-of-inertia uncertainty nonlinear robust control large angle attitude maneuver external disturbances

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Sparse KPCA for feature extraction in speech recognition

Sparse KPCA for feature extraction in speech recognition

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2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05

作者： Lima, A. Zen, H. Nankaku, Y. Tokuda, K. Kitamura, T. Resende, F.G. Nagoya Institute of Technology Department of Computer Science and Engineering Nagoya 466-8555 Japan Federal University of Rio de Janeiro Dept. of Electronics and Computer Engineering/EPoli Program of Electrical Engineering/COPPE Rio de Janeiro 21945-970 Brazil

ISBN: (纸本)0780388747

This paper presents an analysis of the applicability of Sparse Kernel Principal Component Analysis (SKPCA) for feature extraction in speech recognition, as well as, a proposed approach to make the SKPCA technique realizable for a large amount of training data, which is an usual context in speech recognition systems. Although the KPCA (Kernel Principal Component Analysis) has proved to be an efficient technique for being applied to speech recognition, it has the disadvantage of requiring training data reduction, when its amount is excessively large. The standard approach to perform this data reduction is to randomly choose frames from the original data set, which does not necessarily provide a good statistical representation of the original data set. In order to solve this problem a likelihood related re-estimation procedure was applied to the KPCA framework, thus creating the SKPCA. The experimental results show the efficiency of SKPCA technique with the proposed approach over the KPCA with the standard sparse solution using randomly chosen frames and the standard feature extraction techniques. © 2005 IEEE.

关键词： Speech recognition

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Reduced-order model-based feedback controller design for subsonic cavity flows

Reduced-order model-based feedback controller design for sub...

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43rd AIAA Aerospace Sciences Meeting and Exhibit

作者： Yuan, X. Caraballo, E. Yan, P. Özbay, H. Serrani, A. DeBonis, J. Myatt, J.H. Samimy, M. Collaborative Center of Control Science Ohio State University United States Department of Electrical and Computer Engineering Department of Mechanical Engineering United States Bilkent Univ. Dept. of Electrical and Electronics Eng. Ankara Turkey NASA Glenn's Quiet Aircraft Technology Program United States Air Force Research Laboratory Air Vehicles Directorate WPAFB United States

This paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows that the equilibrium of the POD model is unstable and a static output feedback controller cannot stabilize it. We develop Linear Quadratic (LQ) optimal state feedback controllers and LQ optimal observers for the linearized models. The linear controllers and observers are applied to the nonlinear system using simulations. The controller robustness is numerically tested with respect to different POD models generated at different forcing frequencies. An estimation for the region of attraction of the linear controllers is also provided.

关键词： Subsonic flow

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Capacity bound of MIMO systems with MPSK modulation and superimposed pilots

Capacity bound of MIMO systems with MPSK modulation and supe...

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作者： Zhao, Yifei Zhao, Ming Wang, Jing Ren, Yong Department of Electronic Engineering Tsinghua University China Tsinghua University China School of Information Science and Technology Technical Group China 3G Mobile Communication R and D Project China National 863 Program China Radio Communication Committee Chinese Institute of Communications China Chinese Institute of Electronics China Tsinghua University China

The enormous capacity potential of multiple-input multiple-output (MIMO) is based on some unrealistic assumptions, such as the complete channel state information (CCSI) at the receiver and Gaussian distributed data. In this paper, in frequency-flat Rayleigh fading environment, we investigate the ergodic capacity of MIMO systems with M-ary phase-shift keying (MPSK) modulation and superimposed pilots for channel estimation. With linear minimum mean square error (LMMSE) channel estimation, the optimal pilots design is presented. For the mathematical tractability, we also derive an easy-computing closed-form lower bound of the channel capacity. Furthermore, the optimal power allocation between the data and pilots is investigated by numerical optimization. It is shown that more power should be devoted to the data in low SNR environments and to the pilots in high SNR environments. Copyright © 2005 The Institute of electronics, Information and Communication Engineers.

关键词： Telecommunication systems

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Analytical approach for calculating the minimally required ranging codes in fixed and mobile broadband wireless access systems based on OFDMA

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WSEAS Transactions on Communications 2005年第10期4卷 989-993页

作者： Chang, Yong Hwang, Gang Uk Lee, Yutae Telecommunication Systems Division Information and Communication Business Samsung Electronics Co. Ltd. Suwon-si Gyeonggi-do Korea Republic of Division of Applied Mathematics and Telecommunication Engineering Program Korea Advanced Institute of Science and Technology Taejeon Korea Republic of Department of Information and Communication Engineering Dongeui University Busanjin-gu Busan 614-714 Korea Republic of

In this paper, we consider a ranging procedure occurred in the fixed and mobile broadband wireless access systems based on the Wireless MAN-OFDMA (Metropolitan Area Network -Orthogonal Frequency Division Multiple Access). A ranging procedure is a collection of processes for a Mobile Subscriber Station (MSS) and a Base Station (BS) to maintain the quality of the radio frequency communication link between them. When multiple subscribers select the same ranging codes from the given ranging code pool and range the BS by transmitting those identical ranging codes at the same time frame, the ranging collision may be occurred at BS because the BS can not differentiate two different MSSs since they selected the same ranging code. We propose a mathematical performance model to analyze the probability of ranging collision affected by both the capacity of the ranging code pool and the rate of the MSS arriving to the system and investigate the numerical results of the proposed model. By the proposed model and its numerical results, we can calculate the minimum number of the required ranging codes to be implemented in BS(Base Station). We compare the analytical results with the simulated results to validate the proposed mathematical model is correct.

关键词： Wireless telecommunication systems

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Reconstruction of a complex acoustic field from its real or imaginary part

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The Journal of the Acoustical Society of America 2005年第S1期78卷 S30-S30页

作者： Michael S. Wengrovitz George V. Frisk Alan V. Oppenheim MIT/WHOI Joint Program in Oceanography/Oceanographic Engineering Woods Hole MA 02543 Woods Hole Oceanographic Institution Woods Hole MA 02543 Research Laboratory of Electronics Department of EECS Massachusetts Institute of Technology Cambridge MA 02139

In underwater acoustics, the sound pressure field in a horizontally stratified, range‐independent medium due to a continuous‐wave point source can be described by a Hankel transform of the depth‐dependent Green's function. Although the total field consists of both outgoing and incoming components, a reasonable assumption is that the incoming components can be neglected. This assumption is the basis for a number of synthetic field generation techniques such as the Fast Field program (FFP) [F. R. DiNapoli and R. L. Deavenport, J. Acoust. Soc. Am. 67, 92–105 (1980)]. It is shown that the condition that the field consists only of outgoing components implies a relationship between the real and imaginary parts of the field. An implication is that the real (imaginary) part of the pressure field can be reconstructed from the imaginary (real) part. An algorithm for performing this reconstruction is presented and examples of its application to synthetic and experimental acoustic fields is discussed.

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