반응형 컴퓨터공학과42 Metaverse & Immersive Contents Metaverse The Metaverse is the convergenct of Virtually enhanced physical reality Physically persistent virtual space Augmentation technologies that layer information onto our perception of the physical environment Simulation refers to technologies that model reality Intimate technologies are focused inwardly, on the identity and actions of the individual or object External technologies are focu.. 2023. 3. 21. 2장 Sinusoids (4)_회전 페이저 해석/ 페이저 합/ 오일러 공식/ 복소 진폭/ 사인파의 합/ 페이저 합 규칙 & 증명/ 시간-이동을 위상으로 변환 Rotating phasor interpretation Consider $Z_{3}=Z_{1}Z_{2}$, where $Z_{1}=r_{1}e^{j\theta _{1}}$ and $Z_{2}=r_{2}e^{j\theta _{2}}$ $Z_{3}=r_{1}r_{2}e^{j(\theta _{1}+\theta _{2})}$ $z(t) = Xe^{j\omega t}\;\;\;\;\;\;\;\; X = Ae^{j\varphi }$ Where $z(t)$ is the product of the complex number $X$ (called complex amplitude) and $e^{j\omega t}$ The complex amplitude is also called a phasor. The complex .. 2023. 3. 19. 2장 Sinusoids(3)_ 복소수/ 극좌표/ 극좌표계와 직교좌표계/ 오일러 공식/ 복소 지수/ 오일러 공식의 실수 부분 Re()/ 복소 진폭/ 복소 지수 신호의 실수 부분과 허수 부분 COMPLEX NUMBERS To solve $z^{2}=-1$ $z=j$ Math and Physics use $z=i$ Complex number : $z=x+jy$ $i$대신 $j$ 사용 y가 imaginary number, x가 real number x가 $cos\theta$ , y가 $sin\theta$ 이므로 $cos\theta + jsin\theta = e^{j\theta}$ $z = re^{j\theta}= rcos\theta + jrsin\theta$ PLOT COMPLEX NUMBERS COMPLEX ADDITION = VECTOR Addition POLAR FORM Vector Form Length = 1 Angle = $\theta$ Common Values $j$ has angle.. 2023. 3. 17. 2장 Sinusoids (2)_위상 변위와 시간 변위 / 사인파 샘플링 Phase shift and time shift The phase shift parameter $\varphi $ determines the time locations of maxima and minima. $5cos(0.3\pi t+1.2\pi)$ TIME - SHIFT In a mathematical formula, we can replace $t$ with $t-t_{m}$ $x(t-t_{m})=Acos(\omega (t-t_{m}))$ Then the $t=0$ point moves to $t=t_{m}$ Peak value of $cos(\omega (t-t_{m}))$ is now at $t=t_{m}$ TIME-SHIFTED SINUSOID $x(t+4)=5cos(0.3\pi(t+4)) =5.. 2023. 3. 16. 2장 Sinusoids (1)_사인파 (사인, 코사인) / 사인함수와 코사인함수/ 음성파형의 예 / 음성 신호 : BAT / 파형의 디지털화 / 주기에 대한 빈도의 관계 / Sinusoids A general class of signals called cosine or sine signals. Write the general formula for a “sinusoidal” waveform or signal. From the formula, plot the sinusoid versus time. The most basic signals in the theory of signals and systems. Waveform is a SINUSOIDAL SIGNAL. Computer plot looks like a sine wave The mathematical formula: $x(t) =$ $Acos(2\pi (440)t+\varphi)$ Sampling rate of 5563... 2023. 3. 15. 1장 Introduction_신호/시스템/신호의 수학적 표현 Signals A signal as "something" that carries information. Usually, something is a pattern of variations of a physical quantity that can be manipulated, stored, or transmitted by physical process. speech signal : Biomedical signals electrocardiogram (ECG), photoplethysmography (PPG) arterial blood pressure (ABP) 신호는 정보를 전달함. 일반적으로, 무언가가 물리적 과정에 의해 조작, 저장 또는 전송될 수 있는 물리적 양의 변화 패턴임. 생체신호: ECG(심전도) .. 2023. 3. 13. 이전 1 ··· 4 5 6 7 다음 반응형
