• Title/Summary/Keyword: Formula-based method

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A study on literature, disease and syndrome, and formula-based paradoxical treatment (문헌, 병증(病證)과 방제(方劑)에 근거한 반치법(反治法)에 대한 고찰)

  • Shin, Soon Shik
    • Herbal Formula Science
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    • v.24 no.1
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    • pp.31-43
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    • 2016
  • Objectives Based on related literature, cold and heat, deficiency and excess, true and false, and actually used formulas, paradoxical treatments presented in the 『Plain Questions of Inner Canon of Yellow Emperor』 including ‘treating pseudo-heat symptoms and real cold syndrome with cold herbs, treating pseudo-heat symptoms and real cold syndrome with cold herbs’ were analyzed.Methods Out of literature, paradoxical treatment related classics and papers were investigated and analyzed. Among diseases and syndromes, real cold syndrome with pseudo-heat symptoms, real heat syndrome with pseudo-cold symptoms, real deficiency syndrome with pseudo-excess symptoms, and real excess syndrome with pseudo-deficiency symptoms were reviewed. Among formulas, typical examples of the above mentioned paradoxical treatments were used as examples to analyze paradoxical treatments.Results Treating pseudo-heat symptoms and real cold syndrome with cold herbs is a method that uses herbs with cool and cold nature to treat real cold syndrome with pseudo-heat symptoms and Tongmaeksayeokgajeodamjeuptang is suitable for this method. Treating pseudo-cold symptoms and real heat syndrome with hot herbs is a method that uses herbs with warm and hot nature to treat real heat syndrome with pseudo-cold symptoms and Baekhogainsamtang is suitable for this method.Conclusions Based on the related literature, cold and heat, deficiency and excess, true and false, and actually used formulas examined as mentioned above, the paradoxical treatments presented in the 『Plain Questions of Inner Canon of Yellow Emperor』 are thought to be reasonable paradoxical treatments that fit the diseases and syndromes that actually appeared in our bodies.

Sensitivity Analysis of Engine Mount System using FRF-based Substructuring Method (전달함수합성법을 이용한 엔진마운트계의 민감도 해석)

  • Lee, Du-Ho;Hwang, U-Seok;Kim, Chan-Muk
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.1
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    • pp.153-160
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    • 2001
  • A general procedure for the design sensitivity analysis of structural dynamic problems has been presented in frame of the FRF-based substructuring formulation. For a system response function, the proposed method gives a parametric design sensitivity formula in terms of the partial derivatives of the connection element properties and the transfer matrix of the subsystems. The derived design sensitivity formula is applied to an engine mount system. An interior noise problem in the passenger car is analyzed using the FRF-based substructuring method and the proposed formulation is adopted to study the response variations with respect to the dynamic characteristics of the engine mounts and the bushes. To obtain the FRFs, a finite element model is built for the engine mount structures, and test data is used for the trimmed body including cabin cavity. The comparison of sensitivities derived by the proposed method and the finite difference method shows that the proposed method is efficient and accurate. The proposed sensitivity analysis method indicates effectively the most sensitive location to the interior noise among the engine mounts and the bushes.

Recurrence Formula for the Central Moments of Number of Successes with n Poisson Trials

  • Moon, Myung-Sang
    • Journal of the Korean Data and Information Science Society
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    • v.14 no.2
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    • pp.385-391
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    • 2003
  • A sequence of n Bernoulli trials which violates the constant success probability assumption is termed as "Poisson trials". In this paper, the recurrence formula for the r-th central moment of number of successes with n Poisson trials is derived. Romanovsky's method, based on the differentiation of characteristic function, is used in the derivation of recurrence formula for the central moments of conventional binomial distribution. Romanovsky's method is applied to that of Poisson trials in this paper. Some central moment calculation results are given to compare the central moments of Poisson trials with those of conventional binomial distribution.

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Linear and Nonlinear Wave Pressure Distributions Acting on Vertical Caisson of Large Size in 3-Dimensional Wave Fields (3차원파동장에 있어서 대형연직케이슨에 작용하는 선형 및 비선형의 파압분포특성에 관한 연구)

  • 김도삼;신동훈;이봉재
    • Journal of Ocean Engineering and Technology
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    • v.15 no.3
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    • pp.114-119
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    • 2001
  • Goda formula (Goda, 1973) has been used in the determination of wave pressures acting on a large size caisson such as the pier of the cable stayed bridge at sea. Goda formula, however, is to evaluate the wave pressures acting the infinite vertical caisson of composite breakwater so that it can`t be applied to a large caisson with finite width and length because of diffraction effects. In the present study, three dimensional nonlinear frequence domain method based on perturbation method and boundary integral method is applied to the computation of the linear and nonlinear wave pressures acting on the front of a large size caisson under the variation of its width and length, and angle of incident wave. The numerical results are compared to Goda\`s ones, and then the characteristics of wave pressure distributions acting on a large size caisson are discussed.

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Residual Strength of Damaged Tubulars under Combined Axial Compression, Hydrostatic Pressure and End Bending Moment (복합 하중에 대한 손상 원통의 잔류강도)

  • Cho, Sang-Rai;Gwak, Dong-Il
    • Journal of Ocean Engineering and Technology
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    • v.3 no.2
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    • pp.118-124
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    • 1989
  • In this paper a design formula has been proposed to predict the residual strength of damaged tubulars subjected to combined axial copression, hydrostatic pressure and end bending loadings. A theoretical analysis method was employed to calculate the residual strengths, in which the geometric configuration of damaged tubulars is realistically described using empirically derived equations. The predictions using this method have been compared with relevent experimental results to demonstrate their validity and accuracy. A rigorous parametric study has been conducted using the method, and then a design formula has been derived based upon the parametric study results.

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Residual Strength of Damaged Tubulars under Combined Axial Compression, Hydrostatic Pressure and End Bending Moment (복합 하중에 대한 손상 원통의 잔류강도)

  • Cho, Sang-Rai;Gwak, Dong-Il
    • Journal of Ocean Engineering and Technology
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    • v.3 no.2
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    • pp.618-618
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    • 1989
  • In this paper a design formula has been proposed to predict the residual strength of damaged tubulars subjected to combined axial copression, hydrostatic pressure and end bending loadings. A theoretical analysis method was employed to calculate the residual strengths, in which the geometric configuration of damaged tubulars is realistically described using empirically derived equations. The predictions using this method have been compared with relevent experimental results to demonstrate their validity and accuracy. A rigorous parametric study has been conducted using the method, and then a design formula has been derived based upon the parametric study results.

On the Calculation of Added Resistance of a Ship by Maruo′s Formula (Maruo 공식에 의한 부가저항 계산에 대한 소고)

  • 홍도천;홍사영;김은찬
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2001.05a
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    • pp.202-207
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    • 2001
  • The added resistance of a ship advancing in waves can be split into the resistance due to the radiation wave and the resistance due to the diffraction wave. In this study, the former has been calculated by a method based on Maruo's formula. The latter must be calculated by other methods. Ship motion is calculated by the usual strip method. The amplitude of two dimensional far-field waves is calculated using the improved Green integral equation. The present numerical method can be used for the estimation of the added resistance due to the radiation wave since the present numerical result is much smaller than other existing numerical results considered to be overestimated.

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Allergenicity Reduction of Milk (우유에서의 알레르겐 저감화 방법)

  • Ha, Woel-Kyu
    • Journal of Dairy Science and Biotechnology
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    • v.26 no.1
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    • pp.27-36
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    • 2008
  • This review was written to introduce updated data on the structure and function of the major milk proteins identified as allergens, the characterization of their epitopes in each allergenic milk proteins, and the reduction of milk protein allergenicity. Most mammalian milk protein, even protein present at low concentration, are potential allergens. Epitopes identified in milk proteins are both conformational(structured epitope) and sequential epitopes(linear epitope), throughout the protein molecules. Epitopes on casein and whey proteins are reported to be sequential epitope and conformational epitopes, respectively. Conformational epitopes on whey protein are changed into sequential epitope by heat denaturation during heat treatment. Several methods have been proposed to reduce allergenicity of milk proteins. Most ideal and acceptable method to make hypoallergenic milk or formula, so far, is the hydrolysis of allergenic milk proteins by enzymes that has substrate specificity, such as pepsin, trypsin, or chymotrypsin. Commercial formulas based on milk protein hydrolysate are available for therapeutic purpose, hypoantigenic formula for infants from families with a history of milk allergy and hypoallergenic formula for infants with existing allergic symptoms.

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A Study on Evaluation Method of Cable Tension for Railway Steel Composite Bridge (강철도 복합교량 케이블의 장력 평가기법에 관한 연구)

  • Choi, Jung-Youl;Lee, Soo-Jae;Chung, Jee-Seung
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.4
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    • pp.407-413
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    • 2022
  • In this study, the empirical formula for evaluating cable tension based on long-term measurement for about 3 years according to temperature change was proposed by proving the correlation between the expansion joint displacement of the upper road bridge and the cable tension of the lower railway bridge. The tension prediction results using the empirical formula for tension evaluation each cables proposed in this study were found to be in good agreement with the cable tension using the vibration method within 3%. Therefore, it was analyzed that it could be applied together with the vibration method that was an experimental technique, to predict and evaluate the cable tension in serviced railway steel composite bridge. As a result of applying the estimated temperature calculated by the empirical formula for expansion proposed in this study to the empirical formula, it was analyzed that a high level of reliability could be secured when compared with the vibration method. Therefore, it is judged that the empirical formula for cable tension evaluation reflecting the estimated temperature proposed in this study can be used to predict the tension of cables according to climate change in the future and establish a maintenance plan.

Asymptotic computation of Greeks under a stochastic volatility model

  • Park, Sang-Hyeon;Lee, Kiseop
    • Communications for Statistical Applications and Methods
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    • v.23 no.1
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    • pp.21-32
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    • 2016
  • We study asymptotic expansion formulae for numerical computation of Greeks (i.e. sensitivity) in finance. Our approach is based on the integration-by-parts formula of the Malliavin calculus. We propose asymptotic expansion of Greeks for a stochastic volatility model using the Greeks formula of the Black-Scholes model. A singular perturbation method is applied to derive asymptotic Greeks formulae. We also provide numerical simulation of our method and compare it to the Monte Carlo finite difference approach.