• Title/Summary/Keyword: 합성함수

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The design of digital circuit for chaotic composition map (혼돈합성맵의 디지털회로설계)

  • Park, Kwang-Hyeon;Seo, Yong-Won
    • Journal of Advanced Navigation Technology
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    • v.17 no.6
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    • pp.652-657
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    • 2013
  • In this paper the design methode of a separated composition state machine based on the compositive map with two chaotic maps together and the result of that is proposed. The digital circuits of chaotic composition map for the use of chaotic binary stream generator are designed in this work. The discretized truth table of chaotic composition function which is composed of two chaotic functions - the saw tooth function and skewed logistic function - is made out, and also simplefied Boolean algebras of digital circuits are obtained as a mathematical model. Consequently, the digital circuits of the map for chaotic composition function are presented in this paper.

Derivation and error analysis of the optical transfer function using two-pupil synthesis in the modified triangular interferometer (변형 삼각 간섭계의 two-pupil 합성을 이용한 광전달 함수의 유도와 오차원인 분석)

  • Kim, Soo-Gil
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.11a
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    • pp.179-181
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    • 2004
  • 본 논문에서는 변형 삼각간섭계를 이용한 간섭패턴 생성과 관련한 몇 가지 실험결과를 제시한다. Two-pupil 합성 방법을 이용하여 변형 삼각간섭계의 광전달함수를 합성하고 광전달함수에 내포된 오차에 대한 원인을 분석해 보았다.

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Concatenative Speech Sythesis based on Diphone Clustering using improved spectral smoothing (개선된 스펙트럼 스무딩을 이용한 다이폰 클러스터링 기반의 연결 음성합성)

  • 장효종;김계영;최형일
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.04b
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    • pp.499-501
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    • 2002
  • 최근의 합성음성단위 연결을 통한 음성합성 방법의 잘 알려진 문제점은 연결 부분에서 불연속이 발생한다는 것이다. 본 논문에서는 음성을 합성할 때 나타나는 스펙트럼의 불연속을 제거하기 위하여 개선된 스펙트럼 스무딩 방법을 제안한다. 그리고 보다 좋은 스무딩의 결과를 얻기 위하여 음성합성의 단위로는 문맥에 민감한 클러스터링된 다이폰을 사용한다. 스무딩 방법에서는 연결 구간에서의 다이폰 바운더리에서의 양쪽 스펙트럼의 분포를 고려하여 시간에 따라 가중치를 다르게 주어 스무딩을 수행한다. 또한 가중치를 결정할 때 비선형 함수인 B-Spline함수를 사용하여 스무딩을 수행하여 보다 자연스러운 스펙트럼을 생성 할 수 있었다.

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Exploration of the Composite Properties of Linear Functions from Instrumental Genesis of CAS and Mathematical Knowledge Discovery (CAS의 도구발생과 수학 지식의 발견 관점에서 고찰한 일차함수의 합성 성질 탐구)

  • Kim, Jin-Hwan;Cho, Cheong-Soo
    • Communications of Mathematical Education
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    • v.24 no.3
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    • pp.611-626
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    • 2010
  • The purpose of this study is to explore the composite properties of linear functions using CAS calculators. The meaning and processes in which technological tools such as CAS calculators generated to instrument are reviewed. Other theoretical topic is the design of an exploring model of observing-conjecturing-reasoning and proving using CAS on experimental mathematics. Based on these background, the researchers analyzed the properties of the family of composite functions of linear functions. From analysis, instrumental capacity of CAS such as graphing, table generation and symbolic manipulation is a meaningful tool for this exploration. The result of this study identified that CAS as a mediator of mathematical activity takes part of major role of changing new ways of teaching and learning school mathematics.

Effect of Various Regression Functions on Structural Optimizations Using the Central Composite Method (중심합성법에 의한 구조최적화에서 회귀함수변화의 영향)

  • Park, Jung-Sun;Jeon, Yong-Sung;Im, Jong-Bin
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.1
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    • pp.26-32
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    • 2005
  • In this paper, the effect of various regression models is investigated on structural optimization using the central composite method. Three bar truss and the upper platform of a satellite are optimized using various regression models that are polynomial, exponential and log functions. Response surface method is non-gradient, semi-global, discrete and fast converging in optimization problem. Sampling points are extracted by the design of experiments using the central composite method. Response surface is generated using the various regression functions. Structural analysis for calculating constraints is executed to find static and dynamic responses. From this study, it is verified that the response surface method has advantage in optimum value and computation time in comparison to other optimization methods.

A study on the student's question about the existence of the inverse function for the task that connects the two correspondence relations (두 대응관계를 연결한 과제에 대하여 역함수 존재 여부에 대한 학생의 질문에 관한 소고)

  • Lee, Dong Gun
    • The Mathematical Education
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    • v.58 no.2
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    • pp.239-262
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    • 2019
  • This study deals with the anxieties that originated from specific student questions. Through the analysis of the textbooks, we confirmed that the question was a sufficiently plausible question. Third interviews were also held with three high school students. Through the interviews, we analyzed students' expressions about the new correspondence relationship that the two correspondence relations are linked. In the determination of the composite function and the determination of the inverse function existence, We have observed a case of how the worries about domain are being reconstructed from students into meaningful mathematical knowledge. Through this, we confirmed that the question will be confusing to students in the field. In this study, we observed the transfer of domain in relation to student domain in composite function. In particular, a present study revealed that the students involved in the interview were influenced by this domain transfer phenomenon in determining whether the task given in the interview was a function. This was the same in determining the existence of a inverse function. The examples presented in this study are limited to specific cases in limited circumstances. Therefore, it can not be applied directly to teaching and learning situations. However, it is expected that this study will provide other researchers with insight into function learning related research.

위너공간에서의 푸리에-파인만 변환과 합성곱

  • Chang, Geon-Su;Yoo, Il;Kim, Byeong-Su
    • Communications of the Korean Mathematical Society
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    • v.15 no.1
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    • pp.1-27
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    • 2000
  • 위너공간과 추상 위너공간 위에서의 푸리에-파인만 변환, 푸리에-위너 변환 그리고 합성곱을 정의하고 여러가지 형태의 함수들에 대한 변환과 합성곱의 존재정리 및 여러가지 성질을 소개한다. 또한, 이 함수들의 파시발 관계와 프란셰렐 관계에 대해서도 알아본다.

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Fast Harmonic Synthesis Method for Sinusoidal Speech-Audio Model (정현파 음성-오디오 모델의 빠른 하모닉 합성 방법)

  • Kim, Gyu-Jin;Kim, Jong-Hark;Jung, Gyu-Hyeok;Lee, In-Sung
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.44 no.4 s.316
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    • pp.109-116
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    • 2007
  • Most harmonic synthesis methods using phase information employ a quadratic or cubic phase interpolation. The methods are computationally expensive to implement because every component sinewave must be synthesized on a per sample basis. In this paper, we propose a fast harmonic synthesis method for sinusoidal speech/audio coding based on the quadratic and cubic phase function to overcome the complexity problem. To derive the fast harmonic synthesis method, we define the over-sampling function and phase modulation function by constraining the parameter of phase function to be independent for harmonic index and derive the fast synthesis method using IFFT. Experimental results show that the proposed method significantly reduce the complexity of conventional cosine synthesis method while maintaining the performance.

A case Study on Vibration Characteristic Variation Due to Connective Degree of Freedom of Structure in FRE Synthesis Method (전달함수함성법에서 연결자유도 변화에 따른 구조물 진동특성 변화에 대한 연구)

  • Kim, Kuk-Su;Choi, Su-Hyun;Jo, Sung-Je;Jin, Bang-Man
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.05a
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    • pp.684-691
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    • 2005
  • 본 연구는 전달함수 합성법을 이용하여 보강후 구조물의 진동특성을 예측하는 방법이다. 이 방법은 보강후 구조물의 진동특성을 보강전 구조물의 전달함수를 이용하여 예측하는 기술로, 이에 관한 이론은 많이 알려져 있다. 하지만 실제 실험으로 전달함수를 계측할 경우 회전자유도에 대한 전달함수를 계측하기가 어렵다. 따라서 병진자 유도만으로 전달함수 합성법을 적용할 경우 발생하는 고유진동수 추정 오차를, 전체 자유도를 이용한 경우와 간단한 구조물의 수치해석을 통해서 비교해 보고자 한다.

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웨이브릿 합성필터를 이용한 왜곡불변 광패턴인식

  • 이승희;정우영
    • Proceedings of the Korea Society for Industrial Systems Conference
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    • 1998.03a
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    • pp.305-311
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    • 1998
  • 본 논문에서는 회전과 크리에 무관한 상관결과를 얻기 위하여 WCHF-fSDF(wavelet circular harmonic function-filter modulation synthetic discriminant function)필터를 제안하였다. WCHF-fSDF 필터는 기준영상에 대하여 크기변화된 영상들을 웨이브릿 변환한 후, 이들로부터 추출한 단일 원형고조함수를 학습영상으로 사용하여 합성한다. 웨이브릿 변환은 입력영상과 웨이브릿 함수와의 상관으로 정의되므로 웨이브릿 변환을 이용한 패턴인식을 하기 위해서는 두 개의 4f 광 상관 시스템이 필요하다. 여기서 입력영상에 필요한 웨이브릿 함수를 제안된 필터의 설계과정에 포함시켜 전체 광 상관 시스템을 하나의 4f 광상관시스템을 대체시켰다.