• 제목/요약/키워드: Plant Evaluation

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A knowledge base construction and an application to control (지식베이스 구축과 제어응용)

  • 김도성;이명호
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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    • pp.407-412
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    • 1989
  • Using the knowledge base which contains the patterns and data of the past experience of a plant, a learning control method is suggested. The knowledge for controlling a plant is stored to the knowledge base and continually modified after performance evaluation of an applied control input. The performance of the resultant knowledge based control system is examined by an application to process.

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Criteria of Importance-Evaluation Method of Plant Species and Plant Community -Application to Establishment of the Conservation Class of Plant Species and Plant Community- (식물종 및 식물군락의 중요도 평가의 기준-식물종 및 식생의 보전등급 설정에의 응용-)

  • 송종석
    • Korean Journal of Environment and Ecology
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    • 제17권4호
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    • pp.383-395
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    • 2004
  • To evaluate the natural environmental conditions of the local areas, the methods using the plant species and plant community are discussed here, Based on Ohba's(1979), Nakanish's(1980a: 1980b), Okuda and Nakamura's(1989), and Haber et al.'s systems(1991), as the evalution-items, 9 in plant species level and 16 in plant community level are proposed. The evalution-items are classified as 3 criteria in plant species level and 4 criteria in plnat community level. The evalution method could be used to promote the spacial planning and to alleviate other administrative problems. Also it could be applied to decide conservation level of plant species and plant community.

Evaluation of Japanese encephalitis virus vaccine strains currently used in pigs by molecular characterization

  • Lee, Jeong-Ah;Yang, Dong-Kun;Kim, Ha-Hyun;Kim, Sun-Young;Nah, Jin-Ju;Cho, Soo-Dong;Song, Jae-Young
    • Korean Journal of Veterinary Service
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    • 제35권3호
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    • pp.169-174
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    • 2012
  • Japanese encephalitis virus (JEV) is one of the main causes of viral encephalitis in human and animals. For over 30 years, a live attenuated JEV vaccine strain has been used in the veterinary field, and it is required to conduct quality evaluation studies on the commercial vaccines. For the quality control of live attenuated JEV vaccine, we investigated the nucleotide sequence similarity of prME gene derived from five JEV vaccines commercially available in pigs in Korea. The Vero cells infected with JEV vaccines showed specific cytopathic effect, which was characterized by rounding and detached cells. In the phylogenetic analysis, all of the vaccine strains showed a close relationship with the original vaccine seed strain (Anyang 300) and clustered into the genotype 3. In comparison of the nucleotide and deduced amino acid sequences of prME genes with the original strain, all JEV vaccine strains showed high amino acid similarity ranging from 98.9% to 99.5%, but had several point mutations, probably due to high mutation rates of viral RNA polymerase by several virus passages. Even though the current JEV vaccine strains have been maintained and produced for a long period of time, the genetic characterization of them have been rarely changed. However, since the mid 1990's, molecular epidemiology of JEV has been changed sharply from genotype 3 to genotype 1 in Korea, further studies on new vaccine strains to genotype 1 is required for more effective prevention in the field.

Quality Characteristics of Spring Napa Cabbage Kimchi Harvested at Different Times (봄배추의 수확시기가 김치의 품질특성에 미치는 영향)

  • Cho, Sun-Duk;Bang, Hye-Yeol;Lee, Eun-Ji;Kim, Gun-Hee
    • Journal of the Korean Society of Food Culture
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    • 제31권2호
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    • pp.188-193
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    • 2016
  • The purposes of this study were to prolong the storage period and maintain quality of kimchi made from spring napa cabbage, which is used less frequently than winter napa cabbage. The results show that the firmness of kimchi from early July, the latest harvest period, was significantly higher than that of kimchi from mid-June. However, as maturation proceeded, no significant difference was observed following the harvest period when kimchi was stored for 8 weeks. Regarding pH and acidity, which are highly related to maturation of kimchi, pH generally decreased from the initial storage period while acidity increased. In the sensory evaluation, appearance was best in kimchi manufactured in late June according to manufacturing and maturation periods (p<0.05). After 4 and 8 weeks of storage, kimchi manufactured in early July had the highest scores with no significant difference. Texture and overall acceptability also showed no significant difference in each processing period.

A Study on the Reliability Verification of Availability Simulation for Complex Plant (플랜트 가용도 평가 시뮬레이터의 신뢰성 검증에 관한 연구)

  • Lee, Hongcheol;Hwang, Inju;Lee, Hyundong
    • Korean Journal of Computational Design and Engineering
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    • 제20권1호
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    • pp.36-43
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    • 2015
  • Recently, a number of evaluation studies on availability of plant were carried out. This study was conducted to verify of the reliability of a simulation with some variable such as configuration of process, failure probability density function and the number of iteration times for the natural gas liquefaction plant. The error rate of the KICT-RAM solution was evaluated as 0.03~1.79% compared with the result of the MAROS(commercial solution). And the error-rate change was observed in the range of 0.03~1.75 on the condition of the iteration times as 30, 100, 250. As a result the plant availability evaluation approach of KICT-RAM solution was verified as reasonable. However, the careful approach was required to use the solution because the error-rate increased according to iteration times change.