• Kyungpook Mathematical Journal
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• 제62권1호
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• pp.107-118
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• 2022

In this note we observe that any truncated multi-index sequence has an interpolating measure supported in Euclidean space. It is well known that the consistency of a truncated moment sequence is equivalent to the existence of an interpolating measure for the sequence. When the moment matrix of a moment sequence is nonsingular, the sequence is naturally consistent; a proper perturbation to a given moment matrix enables us to confirm the existence of an interpolating measure for the moment sequence. We also illustrate how to find an explicit form of an interpolating measure for some cases.

• 한국미생물·생명공학회지
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• 제25권1호
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• pp.23-29
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• 1997

The nucleotide sequence of the estI gene encoding acetylxylan esterase I of Bacillus stearothermophilus was determined and analyzed. The estI gene was found to consist of a 810 base pair open reading frame coding for a polypeptide of 270 amino acids with a deduced molecular weight of 30 kDa. This was in well agreement with the molecular weight (29 kDa) estimated by SDS-PAGE of the purified esterase. The coding sequence was preceded by a putative ribo some binding site 10 bp upsteam of the ATG codon. Further 53 bp upstream, the transcription initiation signals were identified. The putative $_{-}$10 sequence (TCCAAT) and $_{-}$35 seqence (TTGAAT) corresponded closely to the respective consensus sequences for the Bacillus subtiis major RNA polymerase. The G+C content of the coding region of the estI was 51% whereas that of the third position of codone was 60.2%. The N-terminal amino acid sequence of the EstI deduced from the nucleotide sequence perfectly matched the corresponding region of the purified esterase described previously. Comparison with the amino acid sequence of other esterases and lipases reported so far allowed us to identify a sequence, GLSMG at positions 123 to 127 of the EstI which was reported to be the highly conserved active site sequence for those enzymes. The nucleotide sequence of the estI revealed 55.7% homology to that of the xylC coding for the acetylxylan esterase of Caldocellum saccharolyticum.

• 한국통신학회논문지
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• 제25권1B호
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• pp.99-104
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• 2000

본 논문은에서는 저작권 보호를 위한 디지털 워터마크 삽입방법에서 워터마크로 많이 사용하는 정규 가우시안 시퀀스를 카오스 시퀀스로 대체하고 그 성능을 비교하여 분석한다. 카오스 시퀀스는 만들기가 쉽고, 초기 치의 변화에 따라 전혀 다른 시퀀스를 만들 수 있다. 본 논문에서 사용한 카오스 시퀀스는 Chebyshev map의 시퀀스 분포를 갖도록 Logistic map을 수정하였다. 실험방법은 원 영상을 웨이브릿 변환하여 카오스 시퀀스와 가우시안 시퀀스로 워터마킹한 후 여러 가지 영상처리와, 반복적인 실험의 결과로 나타난 유사도의 분포를 측정, 비교하였다. DCT-기반 워터마킹 시스템의 결과와 마찬가지로 카오스 시퀀스는 일반적인 신호처리에 있어서 가우시안 시퀀스 못지 않게 강하다. 또한 연속적인 반복 실험에 의한 유사도 편차가 가우시안의 경우보다 작고, 손실 압축에 있어서는 가우시안 시퀀스 보다 좋은 성능을 보였다.

• Journal of Electrical Engineering and Technology
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• 제13권2호
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• pp.550-558
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• 2018

This paper presents the current limit strategy of voltage controller of delta-connected H-bridge static synchronous compensator (STATCOM) under an unbalanced voltage fault event. When phase to ground fault happens, the feasibility to heighten the magnitude of sagging phase voltage is considered by using symmetric transformation method in delta-structure STATCOM. And the efficiency to cover the maximum physical current limit of switching device is considered by using vector analysis method that calculate the zero sequence current for balancing the cluster energy in delta connected H-bridge STATCOM. The result is simple and obvious. Only positive sequence current has to be used to support the unbalanced voltage sag. Although the relationship between combination of the negative sequence voltage with current and zero sequence current is nonlinear, the more negative sequence current is supplying, the larger zero sequence current is required. From the full-model STATCOM system simulation, zero sequence current demand is identified according to a ratio of positive and negative sequence compensating current. When only positive sequence current support voltage sag, the least zero sequence current is needed.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2022년도 춘계학술발표대회
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• pp.517-519
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• 2022

In 5G network environment, proactive mobility management is essential as 5G mobile networks provide new services with ultra-low latency through dense deployment of small cells. The importance of a system that actively controls device handover is emerging and it is essential to predict mobile trajectory during handover. Sequence-to-sequence model is a kind of deep learning model where it converts sequences from one domain to sequences in another domain, and mainly used in natural language processing. In this paper, we developed a system for predicting mobile trajectory in a wireless network environment using sequence-to-sequence model. Handover speed can be increased by utilize our sequence-to-sequence model in actual mobile network environment.

• 한국공작기계학회논문집
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• 제15권1호
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• pp.70-75
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• 2006

This paper represents a study on disassembly sequence generation system for automobile parts. This system is practically very useful because proper disassembly sequence of end-of-life product becomes crucial as take-back obligations are imposed for environmental reasons. Therefore a disassembly sequence generation system is suggested to automatically derive all the feasible disassembly sequences from the assembly modeling files. As a result, in consideration of the all parts and subassemblies the optimum disassembly sequence is generated. And the optimum disassembly sequence for a certain part or subassembly can be also suggested.

• 한국정보과학회 언어공학연구회:학술대회논문집(한글 및 한국어 정보처리)
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• 한국정보과학회언어공학연구회 2017년도 제29회 한글 및 한국어 정보처리 학술대회
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• pp.67-70
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• 2017

상호(商號)란 상인이나 회사가 영업 활동을 위해 자기를 표시하는데 쓰는 명칭을 말한다. 일반적으로 국내 기업의 상호 표기법은 한글과 로마자를 혼용함으로 상호 검색 시스템에서 단어 불일치 문제를 발생시킨다. 본 연구에서는 이러한 단어 불일치 문제를 해결하기 위해 Sequence-to-sequence 모델을 이용하여 로마자 상호를 이에 대응하는 한글 상호로 변환하고 그 후보들을 생성하는 시스템을 제안한다. 실험 결과 본 연구에서 구축한 시스템은 57.82%의 단어 정확도, 90.73%의 자소 정확도를 보였다.

• 한국어정보학회:학술대회논문집
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• 한국어정보학회 2017년도 제29회 한글및한국어정보처리학술대회
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• pp.67-70
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• 2017

상호(商號)란 상인이나 회사가 영업 활동을 위해 자기를 표시하는데 쓰는 명칭을 말한다. 일반적으로 국내 기업의 상호 표기법은 한글과 로마자를 혼용함으로 상호 검색 시스템에서 단어 불일치 문제를 발생시킨다. 본 연구에서는 이러한 단어 불일치 문제를 해결하기 위해 Sequence-to-sequence 모델을 이용하여 로마자 상호를 이에 대응하는 한글 상호로 변환하고 그 후보들을 생성하는 시스템을 제안한다. 실험 결과 본 연구에서 구축한 시스템은 57.82%의 단어 정확도, 90.73%의 자소 정확도를 보였다.

• 소성∙가공
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• 제3권3호
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• pp.359-374
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• 1994

Process sequence design in sheet metal forming process by the finite element method is investigated. The forming of sheet metal into a washing machine container is used to demonstrate the design of an improved process sequence which has fewer operations. The design procedure makes extensive use of the finite element method which has simulation capabilities of elastic-plastic modeling. A one-stage process to make an initial blank to the final product is simulated to obtain information on metal flow requirements. Loading simulation for a conventional method is also performed to evaluate the design criteria which are uniform thickness distribution around the finished part and maximum punch load within limit of available press capacity. The newly designed sequence has two forming operations and can achieve net-shape manufacturing, while the conventional process sequence has three forming operations. This specific case conventional process sequence has three forming operations. This specific case can be considered for application of the method and for development of the sequence design methodology in general.

• Journal of applied mathematics & informatics
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• 제37권1_2호
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• pp.37-52
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• 2019

In this paper we introduce a new concept for Riesz almost lacunary ${\chi}^3$ sequence spaces strong P - convergent to zero with respect to an Orlicz function and examine some properties of the resulting sequence spaces. We introduce and study statistical convergence of Riesz almost lacunary ${\chi}^3$ sequence spaces and some inclusion theorems are discussed.