• 제목/요약/키워드: analytical precision

검색결과 814건 처리시간 0.028초

근적외선 분광광도법을 이용한 페노바르비탈정제의 정량법에 관한 연구 (Determination of Phenobarbital in Intact Phenobabital Tablets using NIRS)

  • 차기원;제금련;윤미옥;이수정;최현철;김호정;김효진
    • 분석과학
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    • 제15권2호
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    • pp.102-107
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    • 2002
  • 근적외선 분광광도법 (near infrared spectroscopy, NIRS)를 이용하여 의약품의 신속 정확한 분석법을 개발하였다. 제조회사에 따라 약효성분이 같고 유사한 부형제를 갖고 있는 페노바르비탈정제에서 페노바르비탈을 액체크로마토그래피로 분석한 분석치와 투과방식의 NIRS 의 부분최소자승법(partial least squares regression, PLSR) 으로 얻은 데이터와의 상관관계를 이용하여 검정선을 얻었다. 이 방법의 직선성, 정량범위, 재현성 등을 검토하여 본 분석법의 정확성을 검증하였다. 검정선의 상관계수는 0.9983이고 검정의 표준오차(SEC)는 0.14% 이였으며, 이 분석법의 시간별 및 날자별 정밀도인 CV 값은 각 각 0.45%과 0.56% 이다.

콘크리트 슬래브의 소성수축균열 해석모델 (A Numerical Model for Plastic Shrinkage Cracking of Concrete Slab)

  • 곽효경;하수준
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 2005년도 춘계 학술발표회 논문집
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    • pp.448-455
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    • 2005
  • In this paper, an analytical model for estimation of the time at which the concrete surface begins to dry is introduced to predict whether or not plastic shrinkage cracks occur. First of all, the validity of a consolidation model for bleeding of cement paste proposed by Tan et al. is verified by comparing the analytical results with the experimental results, and used to evaluate the rate and amount of bleed water of concrete. Also an analytical model for evaporation of bleed water which considers the effect of the temperature variation of concrete surface due to hydration heat on the evaporation rate is proposed, and the experimental and analytical results are then compared to verify the validity of the introduced model. In advance, the time at which the concrete surface begins to dry is estimated using above two analytical models, and compared with the experimental results about the time at which plastic shrinkage cracks occur. From the comparison, it is verified that the proposed model can predict the occurrence of plastic shrinkage cracking with comparative precision.

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저자유도 평면 병렬형 기구의 강성 해석 (Stiffness Analysis of a Low-DOF Planar Parallel Manipulator)

  • 김한성
    • 한국정밀공학회지
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    • 제26권8호
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    • pp.79-88
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    • 2009
  • This paper presents the analytical stiffness analysis method for a low-DOF planar parallel manipulator. An n-DOF (n<3) planar parallel manipulator to which 1- or 2-DOF serial mechanism is connected in series may be used as a positioning device in planar tasks requring high payload and high speed. Differently from a 3-DOF planar parallel manipulator, an n-DOF planar parallel counterpart may be subject to constraint forces as well as actuation forces. Using the theory of reciprocal screws, the planar stiffness is modeled such that the moving platform is supported by three springs related to the reciprocal screws of actuations (n) and constraints (3-n). Then, the spring constants can be precisely determined by modeling the compliances of joints and links in serial chains. Finally, the stiffness of two kinds of 2-DOF planar parallel manipulators with simple and complex springs is analyzed. In order to show the effectiveness of the suggested method, the results of analytical stiffness analysis are compared to those of numerical stiffness analysis by using ADAMS.

인간형 로봇의 발 모듈 개발을 위한 분석적 방법의 6 축 힘 / 모멘트 센서 설계 (Design of a Six-Axis Force/Moment Sensor using Analytical Method for Humanoid Robot Foot Module)

  • 원조;임동환;라로평;한창수
    • 한국정밀공학회지
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    • 제32권4호
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    • pp.359-367
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    • 2015
  • The forces and moments exerted on humanoid robot foot are important information for controlling or monitoring the robot. Multi-axis force/moment sensor can be installed under humanoid robot foot to measure forces and moments. The sensor should have large stiffness to support the robot weight and small size not to disturb the motion of the robot. In this paper, we designed a 6-aixs force/moment sensor which has good accuracy, large measuring range, and new compact structure. In addition, the proposed sensor is evaluated using analytical method and FEM(Finite Elements Method) method. Finally, it turned out that it has good performance.

Classification of Characters in Movie by Correlation Analysis of Genre and Linguistic Style

  • You, Eun-Soon;Song, Jae-Won;Park, Seung-Bo
    • 한국컴퓨터정보학회논문지
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    • 제24권1호
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    • pp.49-55
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    • 2019
  • The character dialogue created by AI is unnatural when compared with human-made dialogue, and it can not reveal the character's personality properly in spite of remarkable development of AI. The purpose of this paper is to classify characters through the linguistic style and to investigate the relation of the specific linguistic style with the personality. We analyzed the dialogues of 92 characters selected from total 60 movies categorized four movie genres, such as romantic comedy, action, comedy and horror/thriller, using Linguistic Inquiry and Word Count (LIWC), a text analysis software. As a result, we confirmed that there is a unique language style according to genre. Especially, we could find that the emotional tone than analytical thinking are two important features to classify. They were analyzed as very important features for classification as the precision and recall is over 78% for romantic comedy and action. However, the precision and recall were 66% and 50% for comedy and horror/thriller. Their impact on classification was less than romantic comedy and action genre. The characters of romantic comedy deal with the affection between men and women using a very high value of emotional tone than analytical thinking. The characters of action genre who need rational judgment to perform mission have much greater analytical thinking than emotional tone. Additionally, in the case of comedy and horror/thriller, we analyzed that they have many kinds of characters and that characters often change their personalities in the story.

디텐트 스프링 교정을 위한 해석적방법의 적용성 평가 (Evaluation of Analytical Method for Detent Spring Force Correction)

  • 김선호;권혁홍;박경택;정용헌
    • 한국정밀공학회지
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    • 제16권4호통권97호
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    • pp.57-63
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    • 1999
  • A thin metal plate such as detent spring has the shape deformation due to the phenomenon of spring back after press machining and heat treatment process. This requires the correction of spring shape and force in final inspection process. To do correction of the shape deformation the impact force is manually applied to the bended part of detent spring after measuring the shape deformation and spring force. To develop the automatic spring force correction system, applied force of occurring plastic deformation must be derived from the experimental method. But frequent change of spring shape and material makes it difficult to accomplish the experimental method to be applied. This paper describes the analytical method for detent spring force correction system is to be substituted for the experimental method. FEM(Finite Element Method) is used to find the boundary value between elastic and plastic deformation in the analytical method. To confirm the validity of the analytical method, the result of two methods is compared each other at various applied force conditions. It shows that the simulation result of the analytical method is consistent with the result of the experimental method within the error bound ${\pm}$5%. The result of this paper is useful for development of the automatic spring correction system and reduction of the complicated and tedious processes involved in experimental method.

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