• Title/Summary/Keyword: dual detection

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The NF-l6D VISTA Simulation System

  • Siouris, George M.
    • Transactions on Control, Automation and Systems Engineering
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    • v.4 no.2
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    • pp.114-123
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    • 2002
  • Called VISTA (Variable-stability In-flight Simulator Test Aircraft), the one-of-a-kind NF-l6D has a simulation system that can mimic several aircraft. Though housed in an F-l6 Fighting Falcon airframe, VISTA can also act like the F-15 Eagle or the Navy's F-14 Tomcat. More importantly, such flexibility allows for improved training and consolidation of some sorties. Consequently USAF Test Pilot School students will have an opportunity to learn how to test future integrated cockpits. In this paper we will use the multiple model adaptive estimation (MMAE) and the multiple model adaptive controller (MMAC) techniques to model the aircraft's flight control system containing the longitudinal and lateral-directional axes. Single and dual actuator and sensor failures will also be included in the simulation. White Gaussian noise will be included to simulate the effects of atmospheric disturbances.

The Research of Reducing the Fixed Codebook Search Time of G.723.1 MP-MLQ (잡음 환경에서의 전송율 감소를 위한 G.723.1 VAD 성능개선에 관한 연구)

  • 김정진;박영호;배명진
    • Proceedings of the IEEK Conference
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    • 2000.06d
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    • pp.98-101
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    • 2000
  • On CELP type Vocoders G.723.1 6.3kbps/5.3kbps Dual Rate Speech Codec, which is developed for Internet Phone and videoconferencing, uses VAD(Voice Activity Detection)/CNG (Comfort Noise Generator) in order to reduce the bit rate in a silence period. In order to reduce the bit rate effectively in this paper, we first set the boundary condition of the energy threshold to prevent the consumption of unnecessary processing time, and use three decision rules to detect an active frame by energy, pitch gain and LSP distance. To evaluate the performance of the proposed algorithm we use silence-inserted speech data with 0, 5, 10, 20dB of SNR. As a result when SNR is over 5dB, the bit rate is reduced up to about 40% without speech degradation and the processing time is additionally decreased.

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Detection of AGN outflows in micro-arcsec scales

  • Oh, Junghwan;Trippe, Sascha;Krichbaum, Thomas;Sohn, Bong Won;Bremer, Michael
    • The Bulletin of The Korean Astronomical Society
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    • v.38 no.2
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    • pp.43.1-43.1
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    • 2013
  • We report the preliminary results of our GMVA(Global mm VLBI Array) observation at the frequency of 86 GHz. Observation were made in the dual polarization mode (LCP and RCP), to produce the polarimetric maps with the maximum angular resolution which the array is capable of. We aim to link the source-integrated AGN polarization properties with the polarized spatial source structure, by mapping the polarized "fine structure" of the target AGN. We selected 2 targets, 0954+658 and 0716+714, which (1) have been observed multiple times by the PdBI polarimetric monitoring program; (2) have sufficient integrated fluxes ($S_{90GHz}$ > 1 Jy) ; (3) are close enough to resolve the source structure < 1 pc with given angular resolution ; and (4) are located at high northern declination for good UV coverages. As preliminary results, we present LL and RR polarized images of each target with the maximum angular resolution of ${\sim}60{\mu}as$. Extended structures, probably the jet outflows, are discovered in both sources.

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SAW Gas Sensor using WO$_3$Thin Film (WO$_3$박막을 이용한 SAW 가스 센서)

  • 정영우;허두오;이해민;안형근;한득영
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1995.11a
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    • pp.187-189
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    • 1995
  • A Surface Acoustic Wave Gas sensor for NO, CO, H$_2$gas detection was designed fabricated, and tested. A delay line device was designed to composite a single mode SAW oscillator which enables to measure a SAW velocity. To reduce the effect of temperature and humidity, dual delay line oscillator circuit was used. And final output was measured by digital frequency counter. NO, CO, H$_2$gas were detected by WO$_3$thin film deposited on the path of the Delay Line.

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Development of a magnetic caterpillar based robot for autonomous scanning in the weldment (용접부 자동 탐상을 위한 이동 로봇의 개발)

  • 장준우;정경민;김호철;이정기
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.713-716
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    • 2000
  • In this study, we present a mobile robot for ultrasonic scanning of weldment. magnetic Caterpillar mechanism is selected in order to travel on the inclined surface and vertical wall. A motion control board and motor driver are developed to control four DC-servo motors. A virtual device driver is also developed for the purpose of communicating between the control board and a host PC with Dual 'port ram. To provide the mobile robot with stable and accurate movement, PID control algorithm is applied to the mobile robot control. And a vision system for detecting the weld-line are developed with laser slit beam as a light source. In the experiments, movement of the mobile robot is tested inclined on a surface and a vertical wall.

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The IP development for the real-time process of SoC image protection system (SoC 영상 보안 시스템의 실시간 처리를 위한 IP 개발)

  • Jung, Kwang-Sung;Moon, Cheol-Hong
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.605-606
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    • 2008
  • The distance detection system receives stereo video input through 2 CCD cameras. Using a decoder, the image is changed to the YCbCr4:2:2 format and only the Y signal is saved in the 4*256*8bit shift register of the Dual-Port SRAM. As a result of the matching procedure, the Depth value, which is the distance information, is saved in SRAM, and the Depth Map is made and output to the TFT-LCD screen.

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Eigenstructure Assignment Method for Disturbance Suppression and Fault Isolation (외란 억제 및 고장 분리를 위한 고유구조 지정기법)

  • Seo, Young-Bong;Park, Jae-Weon
    • Journal of Institute of Control, Robotics and Systems
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    • v.8 no.5
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    • pp.357-362
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    • 2002
  • The underlying principle of fault detection via unknown input observer is to make the state estimation error independent of disturbances(or unknown inputs). In this paper, we present a systematic method that can exactly assign the eigenstructure with disturbance suppression and fault isolation capability. A desired eigenstructure for both fault isolation and disturbance suppression is obtained by an optimization method. For the dual purposes, terms for fault isolation and far disturbance suppression are included in the employed objective function for the optimization. The proposed scheme is applied to a simple example to confirm the usefulness of the method.

THIN-FILM-COATED DETECTORS FOR NEUTRON DETECTION

  • McGregor Douglas S.;Gersch Holly K.;Sanders Jeffrey D.;Klann Raymond T.;Lindsay John T.
    • Journal of Radiation Protection and Research
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    • v.26 no.3
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    • pp.167-175
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    • 2001
  • Semiconductor diode detectors coated with neutron reactive material are presently under investigation for various uses, such as remote sensing of thermal neutrons, fast neutron counting, and thermal neutron radiography. Theory indicates that single-coated devices can yield thermal neutron efficiencies from 4% to 11 %, which is supported by experimental evidence. Radiation endurance measurements indicate that the devices function well up to a limiting thermal neutron fluence of $10^{13}/cm^2$, beyond which noticeable degradation occurs. Thermal neutron contrast images of step wedges and simple phantoms, taken with dual in-line pixel devices, show promise for thermal neutron imaging detectors.

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Analysis of Policies in Activating the Infectious Disease Specialist Network (IDSN) for Bioterrorism Events (생물테러 대비 감염전문가 네트워크 운영 활성화 방안 연구)

  • Kim, Yang-Soo
    • Journal of Preventive Medicine and Public Health
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    • v.41 no.4
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    • pp.214-218
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    • 2008
  • Bioterrorism events have worldwide impacts, not only in terms of security and public health policy, but also in other related sectors. Many countries, including Korea, have set up new administrative and operational structures and adapted their preparedness and response plans in order to deal with new kinds of threats. Korea has dual surveillance systems for the early detection of bioterrorism. The first is syndromic surveillance that typically monitors non-specific clinical information that may indicate possible bioterrorism-associated diseases before specific diagnoses are made. The other is infectious disease specialist network that diagnoses and responds to specific illnesses caused by intentional release of biologic agents. Infectious disease physicians, clinical microbiologists, and infection control professionals play critical and complementary roles in these networks. Infectious disease specialists should develop practical and realistic response plans for their institutions in partnership with local and state health departments, in preparation for a real or suspected bioterrorism attack.

Spectral Analysis and Performance Evaluation of DTMF Receivers with the QFT Algorithm (QFT알고리즘을 이용한 DTMF 수신기의 신호해석 및 성능평가)

  • Yoon, Dal-Hwan
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.38 no.9
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    • pp.21-28
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    • 2001
  • The economical detection of dual-tone multi-frequency(DTMF) signals is an important factor when developing cost-effective telecommunication equipment. Each chanel has independently a DTMF receiver, and it informs the detected signal to processors. In order to detect the DTMF signals, the receiver use algorithm such DFT, FFT and Goertzel methods. This paper analyze the power spectra of the DTMF receiver by using the QFT algorithm. As experimental results, it show that can the improved performance of the DTMF receiver and can reduce memory waste and the real time processing.

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