• International Journal of Control, Automation, and Systems
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• 제3권1호
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• pp.109-116
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• 2005

The design of reconfiguring a class of second-order dynamic systems via proportional plus derivative (P-D) feedback is considered. The aim is to resynthesize a P-D feedback controller such that the eigenvalues of the reconfigured closed-loop system can completely recover those of the original close-loop system, and make the corresponding eigenvectors of the former as close to those of the latter as possible. Based on a parametric result of P-D feedback eigenstructure assignment in second-order dynamic systems, parametric expressions for all the P-D feedback gains and all the closed-loop eigenvector matrices are established and a parametric algorithm for this reconfiguration design is proposed. The parametric algorithm offers all the degrees of design freedom, which can be further utilized to satisfy some additional performances in control system designs. This algorithm involves manipulations only on the original second-order system matrices, thus it is simple and convenient to use. An illustrative example and the simulation results show the simplicity and effect of the proposed parametric method.

• 한국건설관리학회논문집
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• 제21권5호
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• pp.3-10
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• 2020

공공건설사업을 수행하기 위해서는 건설 하도급은 필수적인 사항이다. 건설공사의 하수급인은 발주자와 직접 계약을 체결하지 않고 원수급인과 계약을 체결하기 때문에 발주자와 원수급인의 계약에 큰 영향을 받고 있다. 하수급인을 보호하기 위해 공정거래법이 제정되고 건설공사의 표준하도급계약서가 운용되고 있지만 발주자와 원수급인과의 관계를 다루는 국가계약법령체계에서는 하도급계약이 제대로 반영되어 있지 못하다. 특히 하도급계약에서 설계변경이 발생할 경우 금액에 따라 다양한 절차를 거쳐야 하지만 이러한 절차 등이 건설공사 표준하도급계약서에 제대로 반영되지 않고 있으므로 공공건설현장에서는 어려움을 호소하는 경우가 있다. 이에 본 연구에서는 공공건설사업현장에서 설계변경이 이루어질 경우 하도급계약의 제도개선 방향을 다음과 같이 제시하였다. 첫째, 국가계약에서 하수급인의 원수급인에 대한 권리를 강화해야 한다. 둘째, 정보비대칭성을 해소하기 위해 하수급인이 하도급계약과 관련한 정보에 접근할 수 있도록 해야 한다. 셋째, 공공공사의 원도급계약체결시에는 하도급계약의 특성을 반영하여 하수급인의 지위를 보장해야 한다. 넷째, 하도급거래 공정화를 위해 분쟁처리방법을 소송보다 조정이나 중재를 우선하도록 해야 한다.

• 한국의사학회지
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• 제33권2호
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• pp.89-104
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• 2020

The purpose of this research is to build a database structure that can be useful for evidence-based medical practices by constructing the knowledge related to oriental medicine in the classical literature knowledge in a form that can utilize new forms of information technology. As a method, "database" is used as a keyword to search published studies in the field of oriental medicine, research is conducted on classic literature knowledge, and studies describing the contents of the data structure are found and analyzed. In conclusion, the original text DB for the preservation of the original texts and the presentation of the supporting texts should include 'Contents Text', 'Tree Structure', 'Herbal Structure', 'Medicine Manufacture', and 'Disease Structure' tables. In order to search, calculate, and automatically extract expressions written in the original text of the old literature, the tool DB should include 'Unit List', 'Capacity Notation List', 'CUI', 'LUI', and 'SUI' tables. In addition, In order to manage integrated knowledge such as herbal, medicine, acupuncture, disease, and literature, and to implement a search function such as comparison of similarity of control composition, the knowledge DB must contain 'dose-controlled medicine name', 'dose-controlled medicine composition', 'relational knowledge', 'knowledge structure', and 'computational knowledge' tables.

• International Journal of Advanced Culture Technology
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• 제3권2호
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• pp.161-170
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• 2015

Mean separated histogram equalization in order to preserve the original mean brightness has been proposed. To provide the minimum mean brightness error after the histogram modification, the input image's histogram is successively divided by the factor of 2 until the mean brightness error is satisfied the defined threshold. Then each divided group or sub-histogram will be independently equalized based on the proportional input mean. To provide the overall minimum mean brightness error, each group will be controlled by adding some certain pixels from the adjacent grey level of the next group for giving its mean near by the corresponding the divided mean. However, it still exists some little error which will be put into the next adjacent group. By successive dividing the original histogram, we found that the absolute mean brightness error is gradually decreased when the number of group is increased. Therefore, the error threshold is assigned in order to automatically dividing the original histogram for obtaining the desired absolute mean brightness error (AMBE). This process will be applied to the color image by treating each color independently.

• Molecules and Cells
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• 제39권6호
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• pp.460-467
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• 2016

Bacteriophytochromes are phytochrome-like light-sensing photoreceptors that use biliverdin as a chromophore. To study the biochemical properties of the Deinococcus radiodurans bacteriophytochrome (DrBphP) protein, two anti-DrBphP mouse monoclonal antibodies (2B8 and 3H7) were generated. Their specific epitopes were identified in our previous report. We present here fine epitope mapping of these two antibodies by using truncation and substitution of original epitope sequences in order to identify minimized epitope peptides. The previously reported original epitope sequences for 2B8 and 3H7 were truncated from both sides. Our analysis showed that the minimal peptide sequence lengths for 2B8 and 3H7 antibodies were nine amino acids (RDPLPFFPP) and six amino acids (PGEIEE), respectively. We further characterized these peptides in order to investigate their reactivity after single deletion and single substitution of the original peptides. We found that single-substituted 2B8 epitope (RDPLPAFPP) and dual-substituted 3H7 epitope (PGEIAD) showed significantly increased reactivity. These two antibodies with high reactivity for the short modified peptide sequences are valueble for developing new peptide tags for protein research.

• Nuclear Engineering and Technology
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• 제54권5호
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• pp.1804-1812
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• 2022

The aim of this paper is to assess the reliability and accuracy of the PSI standard method, used in many previous works, for the quantification of ND uncertainties in the SPERT-III RIA transient, by quantifying the discrepancy between the actual inserted reactivity and the original static reactivity worth and their associated uncertainties. The assessment has shown that the inherent S3K neutron source renormalization scheme, introduced before starting the transient, alters the original static reactivity worth of the transient CR and reduces the associated uncertainty due to the ND perturbation. In order to overcome these limitations, two additional methods have been developed based on CR adjustment. The comparative study performed between the three methods has showed clearly the high sensitivity of the obtained results to the selected approach and pointed out the importance of using the right procedure in order to simulate correctly the effect of ND uncertainties on the overall parameters in a RIA transient. This study has proven that the approach that allows matching the original static reactivity worth and starting the transient from criticality is the most reliable method since it conservatively preserves the effect of the ND uncertainties on the inserted reactivity during a RIA transient.

• 전자공학회논문지B
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• 제32B권1호
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• pp.180-188
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• 1995

A modified Kohonen's self-organizing feature map (SOFM) algorithm which has binary reinforcement function and a constant learning rate is proposed. In contrast to the time-varing adaptaion gain of the original Kohonen's SOFM algorithm, the proposed algorithm uses a constant adaptation gain, and adds a binary reinforcement function in order to compensate for the lowered learning ability of SOFM due to the constant learning rate. Since the proposed algorithm does not have the complicated multiplication, it's digital hardware implementation is much easier than that of the original SOFM.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.38.4-38
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• 2001

In this paper, a novel model following sliding mode control is proposed by using a novel sliding mode with virtual state. This sliding surface has nominal dynamics of an original system and makes it possible that the Sliding Mode Control(SMC) technique is combined with the optimal controller. Its design is based on the argument system whose dynamics have one higher order than that of the original system. The reaching phase is eliminated by using an initial virtual state that makes the initial sliding function equal to zero.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
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• pp.216-220
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• 1999

In this paper, the feedback linearization technique is used with the sliding mode control for nonlinear system. The combination of these two control techniques can be achieved by proposing a novel sliding surface which has the nonminal dynamics of the original system controlled by feedback linearization technique. The noble design of the sliding surface is based on the augmented system whose dynamics have a higher order than that of the original system. The reaching phase is removed by using an initial virtual state which makes the initial sliding function equal to zero

• 기록학연구
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• 제61호
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• pp.31-69
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• 2019

본 연구는 국내 문학관에 분산 소장되어 있는 작가의 문학자료에 대한 기록학적 탐구와 기록관리 적용에 관한 검토를 통해 문학기록에 적합한 조직방안을 모색하고자 한다. 먼저 문헌 연구와 사례 분석을 통해 문학 기록의 특성과 가치에 적합한 조직화를 위한 '원질서의 원칙'을 탐구했다. 다음으로 '디아스포라 아카이브'를 사례로 문학기록 조직화에 적합한 모형을 도출한 후, 국내 지역문학관에 '분산 컬렉션'의 형태로 존재하는 작가 조정래(1943~)의 문학자료를 대상으로 조직 모형을 적용하였다. 연구결과 조정래 작가의 '분산 컬렉션'에 통합적으로 접근하기 위하여 ICA AtoM 기반 '기록-작가-문학관' 관련 기술정보를 연계하여 단일한 게이트웨이를 통하여 제공하는 모형을 제안하였다. 아울러 개별 문학관의 소장 자료도 기록 조직화의 원칙에 따라 계층적 분류체계를 적용하여 기존의 건별 목록에 비하여 보다 풍부한 집합적 맥락적 정보를 제공할 수 있도록 하였다.