fx-570EX solver

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 fx-570EX solver 신뢰도 계산 https://jappalangs.tistory.com/entry/%EC%8B%A0%EB%A2%B0%EB%8F%84-%EA%B3%84%EC%82%B0 https://youtu.be/w1qLcWXRrN4 https://youtu.be/-MSQfA85TeQ?si=-LSBNHDWY1h0D6Em https://youtube.com/playlist?list=PLP7MKjUAZ-wv-ySjD44kIn0ARnCEMc6S0&si=iPVEBRezLnwrS4M-
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기하학(geometry)

기하학(幾何學, geometry)은 ‘도형에 관한 학문’이다. 그리스어로 ‘geo-’는 대지, ‘-metry’는 계측을 뜻하는 말에서 생겨났다. 징조, 기미, 희미한, 대략 등 여러 뜻을 지닌 ‘기(幾)’와 결합된 ‘기하(幾何)’는 “어느 정도”라는 뜻으로, 계측과 관련된 낱말이다.

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Temperature effects_maturity

  In the   CEB-FIP Model Code 90 ,   maturity   is a concept used to predict the rate at which concrete gains strength based on temperature and time.   Eq. (2.1-87)   is used to calculate the   maturity-adjusted time  $$ t_T$ $​ , which accounts for the effects of temperature on concrete's strength development. \(  S=\int d^{4} x\left(\frac{R}{2 \kappa}\right) \) begin{eqation} S=\int d^{4} x\left(\frac{R}{2 \kappa}\right) end{equation} Definition of Equation (2.1-87): The maturity-adjusted time $$tTt_T tT​$$  is calculated as: $$tT=∫t0texp⁡[QR(1T0−1T(τ))]dτt_T = \int_{t_0}^{t} \exp \left[ \frac{Q}{R} \left( \frac{1}{T_0} - \frac{1}{T(\tau)} \right) \right] d\tau tT​=∫t0​t​exp[RQ​(T0​1​−T(τ)1​)]dτ$$ Where: tTt_T tT​  = maturity-adjusted time (in days) tt t  = real elapsed time (in days) t0t_0 t0​  = start time for the calculation (usually 0) QQ Q  = activation energy for hydration process, typically around 33,500 J/mo...
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