• 제목/요약/키워드: Selection Capability

검색결과 349건 처리시간 0.029초

Effective Multi-label Feature Selection based on Large Offspring Set created by Enhanced Evolutionary Search Process

  • Lim, Hyunki;Seo, Wangduk;Lee, Jaesung
    • 한국컴퓨터정보학회논문지
    • /
    • 제23권9호
    • /
    • pp.7-13
    • /
    • 2018
  • Recent advancement in data gathering technique improves the capability of information collecting, thus allowing the learning process between gathered data patterns and application sub-tasks. A pattern can be associated with multiple labels, demanding multi-label learning capability, resulting in significant attention to multi-label feature selection since it can improve multi-label learning accuracy. However, existing evolutionary multi-label feature selection methods suffer from ineffective search process. In this study, we propose a evolutionary search process for the task of multi-label feature selection problem. The proposed method creates large set of offspring or new feature subsets and then retains the most promising feature subset. Experimental results demonstrate that the proposed method can identify feature subsets giving good multi-label classification accuracy much faster than conventional methods.

지역경제활성화를 위한 향토산업육성사업의 추진모형 연구 (A Study on the Drive Model of Local Industry Promotion Project for the Revitalization of Local Economy)

  • 김영주;;손은일
    • 농촌계획
    • /
    • 제18권3호
    • /
    • pp.1-11
    • /
    • 2012
  • This study postulates a study model to examine the effect on the local economy revitalization of a selection of local resources, the local innovation capability strengthening, the establishment of promotion system and the creation of revenues for the participant groups of the local industry promotion project. To accomplish study purposes, 169 response samples from 85 project groups which drive the local industry promotion project were verified using SPSS 12.0 and AMOS 5.0. The results showed that firstly, the selection of local resources had a significant effect on the local innovation capability strengthening. Secondly, the local innovation capability strengthening had a significant effect on the establishment of promotion system. Thirdly, the establishment of promotion system had a significant effect on the creation of revenues. Fourthly, the selection of local resources didn't have an effect on the revitalization of local economy. Fifthly, both the local innovation capability strengthening and the establishment of promotion system didn't have an effect on the revitalization of local economy. Sixthly, the creation of revenues had a significant effect on the revitalization of local economy. According to the verifications of study model, the revitalization of local economy is achieved by inducing creation of revenues through the local innovation capability strengthening and the establishment of promotion system after the selection of local resources. From these results, this study presents suggestions, limits of study and directions in the future study.

한국 벤처캐피탈의 선별력에 대한 분석 (A Study on Selection Capability and Investment Efficiency of Korean Venture Capitals)

  • 손동원;허원창
    • 경영과학
    • /
    • 제29권3호
    • /
    • pp.91-105
    • /
    • 2012
  • This paper examines the investment efficiency of Korean venture capitals during 1987~2006 (20 years), focusing on their selection capability. Despite the Korean government's efforts, venture capital industry has evolved in a slow speed. Since the genesis of venture paradigm in Korea at 1997, venture capital industry as a macro unit has been fully discussed in Korean contexts. But venture capital's activities at micro level regarding each investment's outcome have not been examined. This study attempts to fill the voids of micro knowledge about each investment success rates by venture capitals. We analyzed venture investment records in 4,791 venture startups and their success rates. Their investment criteria were relevant to high potential industries and amount of tangible assets. But their criteria were not relevant to R&D intensity and financial growth of venture firms, which may indicate low level of maturity about Korean venture capital industry. We found that Korean venture capital's investment pattern may be originated from the low return of investment, so that efficiency of IPO markets is a prerequisite for the upgrade of venture capitals' efficiency. Some policy implications are discussed.

사용자 기반 Capability를 이용한 질의 재작성 기법 (Query rewriting using userbased capability)

  • 박석;안규연
    • 한국정보과학회:학술대회논문집
    • /
    • 한국정보과학회 2001년도 봄 학술발표논문집 Vol.28 No.1 (B)
    • /
    • pp.199-201
    • /
    • 2001
  • 데이터베이스 시스템은 웹의 발달과 함께 웹 데이터베이스라는 새로운 단계로 진화하고 있다. 웹 데이터베이스에서는 다양한 데이터 소스의 통합이 가장 큰 이슈로 미디에이터에서 각 래퍼가 가져온 스키마를 통합하는 작업을 수행한다. 미디에이터에서는 이와 같이 데이터 소수의 통합 외에 사용자에게 질의를 각 데이터 소스에 대하여 재작성 하는 기능이 중요하고 이에 대한 다양한 연구가 진행 중이다. 이때 질의를 각 소스가 처리할 수 있는 부질의로 재작성 할 때 필요한 개념이 capability이다. 본 논문에서는 capability를 기반으로 한 질의 시스템에서 사용자에게 제공되는 뷰와 질의에 대해서도 capability를 적용한 사용자 기반 capability 기법을 제안한다. 지금까지 타 연구에서는 소스에 대한 capability만을 고려하여 질의를 재작성 하였지만 본 논문에서는 사용자 기반의 capability를 함께 고려함으로써 사용자 요구사항을 충족시키면서도 비교적 간단한 분석과 매칭 과정에 의해 컴파일 시간 내에 계산이 가능하도록 하는 알고리즘을 제시한다. 또한 네트워크의 문제 등으로 인해 소스 중 일부분이 사용할 수 없는 상황인 경우 소스에 대해 active selection이 가능하도록 하여 대체 질의를 생성할 수 있게 하였다. 간단한 구현과 제시한 기법이 비용을 절감하는 실제적인 방법이며 타 연구와의 비교를 통해 좋은 성능을 가짐을 보인다.

  • PDF

구조물의 품질 결함 변별력 증대를 위한 수직 에너지 기반의 웨이블릿 Feature 생성 (Structural Quality Defect Discrimination Enhancement using Vertical Energy-based Wavelet Feature Generation)

  • 김준석;정욱
    • 품질경영학회지
    • /
    • 제36권2호
    • /
    • pp.36-44
    • /
    • 2008
  • In this paper a novel feature extraction and selection is carried out in order to improve the discriminating capability between healthy and damaged structure using vibration signals. Although many feature extraction and selection algorithms have been proposed for vibration signals, most proposed approaches don't consider the discriminating ability of features since they are usually in unsupervised manner. We proposed a novel feature extraction and selection algorithm selecting few wavelet coefficients with higher class discriminating capability for damage detection and class visualization. We applied three class separability measures to evaluate the features, i.e. T test statistics, divergence, and Bhattacharyya distance. Experiments with vibration signals from truss structure demonstrate that class separabilities are significantly enhanced using our proposed algorithm compared to other two algorithms with original time-based features and Fourier-based ones.

Selection-based Low-cost Check Node Operation for Extended Min-Sum Algorithm

  • Park, Kyeongbin;Chung, Ki-Seok
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • 제15권2호
    • /
    • pp.485-499
    • /
    • 2021
  • Although non-binary low-density parity-check (NB-LDPC) codes have better error-correction capability than that of binary LDPC codes, their decoding complexity is significantly higher. Therefore, it is crucial to reduce the decoding complexity of NB-LDPC while maintaining their error-correction capability to adopt them for various applications. The extended min-sum (EMS) algorithm is widely used for decoding NB-LDPC codes, and it reduces the complexity of check node (CN) operations via message truncation. Herein, we propose a low-cost CN processing method to reduce the complexity of CN operations, which take most of the decoding time. Unlike existing studies on low complexity CN operations, the proposed method employs quick selection algorithm, thereby reducing the hardware complexity and CN operation time. The experimental results show that the proposed selection-based CN operation is more than three times faster and achieves better error-correction performance than the conventional EMS algorithm.

전압원 HVDC를 이용한 부하집중지로의 송전용량 증대방안 (Transfer Capability Enhancement Using Voltage Source Converter HVDC)

  • 오세승;장길수;차준민
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
    • /
    • pp.328-330
    • /
    • 2005
  • This paper presents a transfer capability enhancement of using VSC HVDC system which can control reactive power as well as active power. The transfer capability is constrained by stability like voltage stability. These constraints may relieved by reactive power control ability of the VSC HVDC system. Site selection algorithm is also proposed.

  • PDF

확장된 Petri-net을 이용한 FMS의 모델링 및 스케쥴링 (Modeling and scheduling for FMS using extended petri nets)

  • 안인석;서기성;우광방
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
    • /
    • pp.488-492
    • /
    • 1991
  • This paper deals with modeling and scheduling for flexible manufacturing systems(FMS). In modeling extended Petri nets are used to describe various and complex properties. To resolve multiple conflict without predefined properties, such as part selection, machine selection, rule-based scheduling method is introduced. This structure have a capability of on-line scheduling with systematic modeling description.

  • PDF

웨딩플래너 선택속성에 관한 에스노그라피적 연구 (Ethnographic study of the selection attributes for wedding planner)

  • 김하정;유지헌
    • 복식문화연구
    • /
    • 제26권2호
    • /
    • pp.217-232
    • /
    • 2018
  • As the types of wedding ceremonies become diversified, and consumers' needs become more selective, greater importance is given to wedding planners' roles in the wedding industry, and consumers require differentiated types of wedding service. As a preliminary qualitative study in this field, an ethnographic study was conducted to identify factors valued by consumers when selecting a wedding planner in the wedding planner market, which has rapidly grown in recent years. An in-depth interview was performed with eight participants in terms of wedding planner utilization type and consumers' understanding of wedding preparation with a wedding planner. The collected data were analyzed through taxonomy, component analysis and decision table analysis; for validation, professional wedding planners were asked to review the items valued by consumers in selecting a wedding planner. Four factors - expense characteristic, wedding planners, wedding consulting companies, and customer characteristics - were identified, along with eight sub-factors (capability, service attitude, technical communication, personal factors, wedding planner encounter paths, spouse's satisfaction status, and companies). Out of these, price (within budget), wedding planners' capability, wedding planners' service attitude are expected to be meaningful in further research because they were found to be attributes commonly valued by every respondent. This study is significant in that it has made a new approach to understanding wedding planner selection attributes through ethnographic research and identified new wedding planner selection attributes.

미국 공공건설사업에서의 건설기술용역 조달시스템 고찰 및 시사점 (U.S. Architectural Engineering Service Procurement System for Public Construction Project and Its Implication)

  • 장철기
    • 한국콘텐츠학회논문지
    • /
    • 제20권2호
    • /
    • pp.215-225
    • /
    • 2020
  • 국내 공공건설사업에서 건설기술용역 발주 및 입·낙찰 과정은 공정성과 투명성이 강조되어 계량적 항목 위주로 업체를 선정하는 방법을 주로 적용하여왔다. 이로 인해 업체의 기술경쟁력을 강화하고자 하는 동기부여가 미흡하였고, 기술력을 기반으로 하는 업체선정방식의 필요성은 지속적으로 제기되어 왔다. 본 연구에서는 미국 공공건설사업에서의 건설기술용역 서비스 발주 및 입·낙찰 관련 미국 정부의 방침, 제반 절차 및 규정 등을 관련법 및 관련시스템을 통해 분석하고, 국내 공공건설공사에서의 건설기술용역 발주 및 입·낙찰 및 나아가 계약관리 및 사후관리에 있어서 공정하고 효율적인 건설기술용역 관리에 시사 하는 바를 도출하였다. 주요 시사점으로는 자격요건 및 역량 기반의 업체 선정, 제출 서류의 단순화, 발주자의 역할 및 책임 강조, 중소업체에 대한 배려, 탈락자에 대한 배려, 사후평가 등의 측면에서 국내 건설기술용역 발주 및 입·낙찰에 고려될 수 있을 것으로 기대된다.