• Title/Summary/Keyword: comparison method

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The Generation of Poisson Random Variates

  • Park, Chae-Ha
    • Journal of Korean Institute of Industrial Engineers
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    • v.1 no.1
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    • pp.87-92
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    • 1975
  • Three approximation methods for generating outcomes on Poisson random variables are discussed. A comparison is made to determine which method requires the least computer execution time and to determine which is the most robust approximation. Results of the comparison study suggest the method to choose for the generating procedure depends on the mean value of Poisson random variable which is being generated.

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Experimental Study and Comparison of Analysis Results on Structural Method of Prestressed Concrete Slab Using Light Hybrid rib to Long Span (장스팬형 경량복합리브 PSC슬래브 구조공법에 관한 비교분석 및 실험적 연구)

  • Shim, Namju;Oh, Jungkeun
    • Korean Journal of Construction Engineering and Management
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    • v.18 no.5
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    • pp.3-10
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    • 2017
  • The HBS slab is a method in which a lightweight sieve is installed on top of the psc slab and two ribs of the neighboring psc slab are combined with ribs formed by the site concrete to act as a single member on the same axis. The purpose of this study is to implement the performance comparison with the existing method through the experimental study on the PSC slab method. In this study, the HBS slab was developed as a method to improve the limit of the existing method and the performance comparison with the existing method is tried to verify its superiority. The comparison of the structural performance with the existing method is carried out through the experimental study of the HBS slab, and the structural performance against the bending performance and shear and the bonding performance between the pc beam and the hbs slab are examined and compared with the existing method through the theoretical method.

A study on the automatic recognition of Korean vowel (한국어 단모음 자동 인식에 관한 연구)

  • 안동순
    • Proceedings of the Acoustical Society of Korea Conference
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    • 1984.12a
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    • pp.57-61
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    • 1984
  • In this study, the system is proposed which can be used for recognition of Koean single vowles "ㅏ, ㅓ, ㅗ, ㅜ, ㅡ, ㅣ, ㅐ, ㅔ, ㅚ,", and automatic recognition is processed using $\mu$-computer. 3 men of not-being-studied are participated in this experiment. Using the period of vowels, one part of the steady state is selected for high speed recognition, and amplitude comparison method, LPC, PARCOR, and Formant are used for parameter of recognition. Formant is obtained by peak picking method using LPC, and then vowels are recognized by amplitude comparison method, LPC, PARCOR, and Formant. As a result, Recognition rates are 90.1% for amplitude comparison method, 93.1% for LPC, 100% for PARCOR, 88.8% for using formant.

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Estimation of Traffic Accident Effectiveness of Zig-zag Marking Using a Comparison Group Method (C-G Method를 이용한 지그재그 노면표시의 교통사고 감소효과 분석)

  • Kwon, Seong-Keun;Lee, Young-Ihn;Cho, Song-Jun
    • International Journal of Highway Engineering
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    • v.14 no.6
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    • pp.149-158
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    • 2012
  • PURPOSES : This research is to evaluate the effects of zig-zag marking. METHODS : Based on the literature review, This research adopt Comparison Group method which was developed by Hauer. RESULTS : The findings are as follows. Effectiveness of treatment at all site 1.06, intersection 0.92, median bus lane 1.93, school zone 0.50, below 6-lane 0.48, above 6-lane 1.19, cat vs person 0.57, car vs car 1.36, car only 1.29. CONCLUSIONS : Though the analysis, it was founded that zig-zag marking on the small scale road(below 6-lane) and school zone contribute to reduce traffic accidents(effectiveness of the treatment : 0.50, 0.48). But the accidents at large scale road and median bus lane where installed zig-zag marking demonstrated negative result.(effectiveness of the treatment indicates exceed 1.0).

Performance Comparison to Solve Angle Ambiguity Needed to Angle of Arrival Estimation in 2D Radar Interferometer (2차원 레이다 간섭계에서 각도 추정 알고리즘의 각도 모호성 해소 성능 비교)

  • Cho, Byung-Lae;Lee, Jung-Soo;Lee, Jong-Min;Sun, Sun-Gu
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.3
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    • pp.410-413
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    • 2012
  • This study describes the performance comparison to solve angle ambiguity needed to angle of arrival estimation in 2D radiometer. There are three algorithms to solve its ambiguity such as phase-comparison monopulse method, digital beam-forming method and least square error of the phase difference in 2D radar interferometer. To estimate two direction angles, phase-comparison monopulse method is sequentially applied to azimuth and elevation direction. To analyze the performance of these methods, probability of solving angle ambiguity and execution time have been chosen as performance indexes. Through the Monte Carlo simulation, we have verified that phase-comparison monopulse method is most effective in real-time signal processing application.

Validation of a Real-Time RT-PCR Method to Quantify Newcastle Disease Virus (NDV) Titer and Comparison with Other Quantifiable Methods

  • Jang, Juno;Hong, Sung-Hwan;Kim, Ik-Hwan
    • Journal of Microbiology and Biotechnology
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    • v.21 no.1
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    • pp.100-108
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    • 2011
  • A method for the rapid detection and quantification of Newcastle disease virus (NDV) produced in an animal cell culture-based production system was developed to enhance the speed of the NDV vaccine manufacturing process. A SYBR Green I-based real-time RT-PCR was designed with a conventional, inexpensive RT-PCR kit targeting the F gene of the NDV LaSota strain. The method developed in this study was validated for specificity, accuracy, precision, linearity, limit of detection (LOD), limit of quantification (LOQ), and robustness. The validation results satisfied the predetermined acceptance criteria. The validated method was used to quantify virus samples produced in an animal cell culture-based production system. The method was able to quantify the NDV samples from mid- or late-production phases, but not effective on samples from the early-production phase. For comparison with other quantifiable methods, immunoblotting, plaque assay, and tissue culture infectious dose 50 ($TCID_{50}$) assay were also performed with the NDV samples. The results demonstrated that the real-time RT-PCR method is suitable for the rapid quantification of virus particles produced in an animal cell-culture-based production system irrespective of viral infectivity.

Analysis of Measurement Error for PM-10 Mass Concentration by Inter-Comparison Study (비교 측정을 통한 PM-10 질량농도의 오차 분석)

  • Jung, Chang-Hoon;Cho, Yang-Sung;Hwang, S.M.;Jung, Y.G.;Ryu, J.C.;Shin, D.S.
    • Journal of Korean Society for Atmospheric Environment
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    • v.23 no.6
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    • pp.689-698
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    • 2007
  • Particular attention is paid to the validity of PM-10 measurement using beta attenuation method. In this study, the inter-comparison studies were undertaken for PM-10 sampler with different measuring methods. The three beta attenuation monitoring instruments (BAM1020, FH C-14, and DIGS-150) and filter based gravitational method using High Volume Air Sampler were collocated and mass concentrations were compared from August to November, 2006. The results of the investigation show that beta attenuation monitoring instruments are comparable with gravitational method within 10% of measurement error. For specific conditions under high humidity and high concentrations, the inter-comparison results also showed a relatively good agreement and this can be explained as the effect of inlet heating of beta attenuation instrument. Subsequently, this study shows that beta attenuation monitoring instruments can be equivalently used with reasonable validity when compared gravimetric method.

International Time Comparison by TWSTFT and GPS at KRISS

  • Hwang, Sang-wook;Lee, Chang Bok;Lee, Jong Koo;Lee, Young Kyu;Lee, Sang Jeong;Yang, Sung-hoon
    • Journal of Positioning, Navigation, and Timing
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    • v.5 no.2
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    • pp.67-74
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    • 2016
  • In this paper, time comparison is performed with standardization institution in Japan using a Two-Way Satellite Time and Frequency Transfer (TWSTFT) technique as one of the methods for high precision time comparison. To analyze the performance of time comparison in the TWSTFT method, time comparison results via the Global Positioning System (GPS) code and carrier wave are analyzed. Through the time comparison performance, frequency stability is analyzed using modified Allan deviation and by this result, characteristics of time comparison of the TWSTFT that is utilized in international time comparison are presented.