• Title/Summary/Keyword: BOO

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A study of discharged excited $N_2$ Laser amplification (방전여기 질소 레이저 증폭에관한 연구)

  • Kim, Soo-Kyung;Choi, Boo-Yeon;Lee, Choo-Hee
    • Proceedings of the KIEE Conference
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    • 1990.07a
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    • pp.455-458
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    • 1990
  • He designed and fabricated oscillator - amplifier system respectively. Amplification system was composed of oscillator, amplifier and synchronization circuit.Synchronization was achived by optical delay and electric circuit delay. As a result, Power gain was 2- 3 with laser pulse width 5 - 6 ns.

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A Study on preionization effect of discharge excited KrF excimer laser (방전여기 KrF 엑사이머 레이저의 에비전리 영향에 관한연구)

  • Kim, Sang-Ook;Choi, Boo-Yeon;Lee, Choo-Hie
    • Proceedings of the KIEE Conference
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    • 1990.07a
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    • pp.459-461
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    • 1990
  • Me performed an experiment about preionization electron number density of charge transfer type KrF excimer laser. At the total pressure of 1.8 and 2.2 atm with helium (He) buffer gas, the experimental range of the electron number density is 8-9 ${\times}$ 10 cm The distance between electrode and preionization pin is 15 mJ at charging voltage of 27kV,gas pressure of 2.2 atm,gas mixture of F /Kr/He = 0.3/396.7(%).

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A Study on Developing Voltage Stability Index arid System Stability by Incorporating Dynamic Load Modeling (부하모델을 고려한 전압 안정도 평가지표개발과 시스템 안정도 연구)

  • Wee, Won-Seok;Ham, Jung-Pil;Choo, Jin-Boo;Kim, Jung-Hoon
    • Proceedings of the KIEE Conference
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    • 1999.11b
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    • pp.187-189
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    • 1999
  • Accurate load models allow more precise calculations of power system stability, This paper presents new static voltage stability index considering the load models. Also, We apply the load models for the existent voltage stability indices, and evaluate them.

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Channel Equalization for QAM Signal Constellation Using Wavelet Transform and Neural Network

  • Lee, Seok-Won;Nam, Boo-Hee
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.147-147
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    • 2000
  • Recently, a considerable amount of attention is being given to the use of wavelets and neural network for modulation and equalization. We proposed a new scheme of equalization for constellation using discrete wavelet transform(DWT) and neural network. The DWT is used for noise reduction and the neural network is used to update the equalizer coefficients adaptively.

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Suboptimal Control of Nonlinear Systems via Block Pulse Transformation (블럭펄스 변환에 의한 비선형계의 준최적제어에 관한 연구)

  • Ahn, Doo-Soo;Kim, Jong-Boo;Lee, Seung
    • Proceedings of the KIEE Conference
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    • 1990.07a
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    • pp.81-84
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    • 1990
  • This paper presents a method of sub-optimal control for nonlinear systems via block pulse transformation. The adaptive optimal control scheme proposed by J.P. Matuszewski is introduced to minimize the performance index. The proposed method is simple and computationally advantageous. Viablity of the this method is established with simulation results for the van der Pole equation for comparision with other methods.

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