• Journal of Power Electronics
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• 제17권5호
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• pp.1288-1297
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• 2017

The estimation of the remaining useful life (RUL) of lithium-ion (Li-ion) batteries is important for intelligent battery management system (BMS). Data mining technology is becoming increasingly mature, and the RUL estimation of Li-ion batteries based on data-driven prognostics is more accurate with the arrival of the era of big data. However, the support vector machine (SVM), which is applied to predict the RUL of Li-ion batteries, uses the traditional single-radial basis kernel function. This type of classifier has weak generalization ability, and it easily shows the problem of data migration, which results in inaccurate prediction of the RUL of Li-ion batteries. In this study, a novel multi-kernel SVM (MSVM) based on polynomial kernel and radial basis kernel function is proposed. Moreover, the particle swarm optimization algorithm is used to search the kernel parameters, penalty factor, and weight coefficient of the MSVM model. Finally, this paper utilizes the NASA battery dataset to form the observed data sequence for regression prediction. Results show that the improved algorithm not only has better prediction accuracy and stronger generalization ability but also decreases training time and computational complexity.

• 한국버섯학회지
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• 제20권4호
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• pp.227-234
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• 2022

트러플로 사용되는 T. melanosporum, T. aestivum 및 T. magnatum의 특성을 파악하고자, 𝛽-glucan, 아미노산, 핵산관련 물질, vitamin C, ergosterol 함량을 분석하였다. 𝛽-Glucan 함량은 T. magnatum이 20.54%로 가장 높게 나타났다. 총 유리아미노산 함량은 T. aestivum이 가장 높게 나타났으며 주요 아미노산은 cystine, glutamic acid, aspartic acid로 나타났다. 총 구성아미노산 함량은 T. magnatum이 가장 높게 나타났으며, 주요 아미노산은 cystine, glutamic acid, lysine으로 나타났다. 핵산관련 물질 함량은 T. magnatum이 1.64 mg/100 g로 가장 높게 나타났다. 3종의 트러플 중 vitamin C와 ergosterol 함량은 T. magnatum에서 각각 10.15 mg/100 g, 596.91 mg/100 g으로 가장 높게 나타났다. 따라서 3종의 트러플 중 T. magnatum의 유용성분 함량이 가장 높은 것으로 확인되었으며, 채취시기, 생장환경에 따른 트러플들을 수집하여 추가적인 유용성분 연구가 필요한 것으로 판단된다.

• 한국균학회지
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• 제17권2호
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• pp.66-75
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• 1989

임상가검물(臨床可檢物)로부터 분리(分離)된 Aspergillus fumigatus 균주(菌株)의 항원조성(抗原造成)과 이균에 감염(感染)된 환자의 항체반응(抗體反應)의 다양성을 Immunoblotting으로 관찰하였다. SDS-PAGE와 immunoblots상에 나타난 결과를 보면 비교분석된 배양려액항원(培養慮液抗原)의 조성에 있어서 균주간(菌株間)에 정성(定性) 및 정량적(定量的) 차이가 있음을 알수 있었다. 혈청학적(血淸學的) 반응력(反應力)과 특이성(特異性)이 비교적 높은 항원성분(抗原成分)을 동정(同定)하기 위해 그러한 항원들이 비교적 많이 함유된 AFG7을 선택하였다. 전기영동(電氣泳動)으로 분리하여 nitrocellulose paper로 전이흡착(轉移吸着)시켜 A. fumigatus나 기타 진균항원(眞菌抗原)에 양성침강항체(陽性沈降抗體)(면역확산시험(免疫擴散試驗)에서)를 가진 혈청과 반응시킨 결과 적어도 36개의 항원성분이 검출되었다. 그러나 혈청학적 진단가치가 있는 항원성분은 4개 정도에 불과했다. 특이성과 반응력이 가장 높아 표준항원(標準抗原)에 반드시 함유되어야 할 것으로 보는 항원성분은 분자량(分子量)이 82 KD 정도되는 항원이었고 그 외에 11 KD, 26 KD, 30 KD 및 31 KD 등도 우수한 항원성분으로서 앞으로 더 연구검토되어야 할 것으로 본다. 반응력이 큰 항원이면 Coomassie청(靑)에는 흐리게 염색되어도 immunoblots상에는 짙게 염색되는데 비해 반응력이 약한 항원은 그와 반대현상을 나타내어 immunoblotting 분석법이 항원의 반응력과 특이성 관찰에 매우 유용함을 알 수 있다. 많은 항원성분이 균종특이(菌種特異) 항원결정기(抗原決定基)와 함께 광범한 균군(菌群)에 분포하는 항원결정기(抗原決定基)도 가지고 있었다.

• 유통과학연구
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• 제14권2호
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• pp.5-12
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• 2016

Purpose - The present study examines the interrelationship between various components constituting shopping experience in the context of the Indian shopping malls. Research design, data, and methodology - Extracting components of shopping experience from the literature review, the study used Interpretive Structural Modelling (ISM) to propose a conceptual model. The study adopted a mixed methods research involving theoretical constructs from past research, qualitative assessment of relationship between the constructs and imposing definite order and direction to qualitative relations based on mathematical computations. Results - Proposed model indicates that the five components of shopping experience (ambience, physical infrastructure, convenience, marketing focus and safety and security) do not converge directly into shopping experience. Rather, they operate following a hierarchy of influences in which marketing focus plays the role of the initiator. Conclusions - This model points at the order of preference of different components of shopping experience and can be a useful guide for retail industry, especially mall developers and supermarket/hypermarket, may use the findings in key decisions about development of physical infrastructure, which are based on marketing focus.

• 한국안전학회지
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• 제33권2호
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• pp.152-157
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• 2018

The degradation and damage of the components for ballasted track could be caused a serious problem for railway safety. Therefore, the integrity evaluation of ballasted track condition is important to ensure and predict that the track safety and track maintenance. Various track components such as rail pad, ballast, sleeper, and rail that are widely used in Republic of Korea and represent a range of physical properties have been selected for this research. In this study, the experimental modal analysis was performed by the non-destructive testing. Modal test results were obtained from the field test and used to assess the condition of the track components. From the field test, the system of ballasted track was found to be simplified as a two-degree-of-freedom(2DOF) dynamic system. The condition of track component was found to directly affect the dynamic response of ballasted tracks. As the results, the dynamic properties of the track component was depend on the track condition and was distributed more roughly and over a wider range than its initial design values. Further, the methodology presented in this study is possible to determine experimentally the fundamental track parameters which are required in the numerical analysis, and also are useful for the safety assessment of track condition.

• 한국산업융합학회 논문집
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• 제10권4호
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• pp.195-200
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• 2007

These days, various and complex threads are developed, so it is necessary to develop the cutting a thread sensors for checking a cut thread in severe environment and it is very important to evaluate the quality of the cutting a thread sensors. The analysis of variance(ANOVA) method is very useful method on the quality evaluation field. In this study, the quality is evaluated by one way layout ANOVA method with the surface roughness data. The experiment is carried out by 3 sensors and the result show that the sensors have the good quality in precision.

• 한국약용작물학회지
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• 제28권3호
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• pp.221-228
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• 2020

Background: Angelica gigas Nakai, that belong to the Umbelliferae family, is one of the traditional medicinal plants in Korea. Its roots have been used to treat gynecological diseases. In this study, growth characteristics and index components were compared with the forest microclimate at several forest sites. Methods and Results: A. gigas was planted in three climatic zones according to the temperature (southern temperature zone - Hamyang, central temperature zone - Bonghwa, and northern temperature zone - Jeongseon) and growth characteristics were investigated in comparison with the forest microclimate. Our results indicated that the root diameter and length, and fresh and dry weight were the highest in Jeongseon. The total content of decursin was the highest in Jeongseon (9.52%), followed by those in Hamyang (8.07%) and Bonghwa (7.48%), respectively. Additionally, the yield of decursin (1.39 g) was the highest in Jeongseon. Conclusions: The yield and index components were influenced by the microclimate in the forests, and it was assumed that high altitude and low temperature affected the increase in growth and index components. These results will be useful as basic data to study the correlation among environmental conditions, growth, and index components.

• Journal of Plant Biotechnology
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• 제36권2호
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• pp.106-114
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• 2009

Genetic components introduced into approved GM crops are a key subject for safety assessment and provide a basis for the development of detection methods for GM crops. In order to understand the genetic components in approved GM crops comprehensively, we screened the genetic vector maps of GM crops that had been approved for commercialization around the world. A total of 64 varieties from 5 major GM crop species (maize, canola, cotton, soybean, and tomato) were subjected to analysis. The genetic components included genes, promoters, terminators, and selection marker. This survey may be useful for researchers who develop GM crops and methods for detecting GM crops.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1992년도 추계학술대회 논문집
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• pp.136-144
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• 1992

Recently, Silicon Nitrde ceramic is regarded as the representative engineering ceramic with the excellent mechanical properties and many functions for mechanical components and parts among various kinds of ceramics in the mechanical industry. But, during the manufacturing of engineering ceramics, there is many volumetric shrinkage coupled with a distortion of the parts which is produced. Due to the requirement for high accuracy of size, form, and surface finish of the components, machining is needed surely. Nowdays, grinding with a resin bond type diamond wheels has been generally applied to machining of the engineering ceramics in the whole world because that it can be conveniently proceeded for workers to dress of tool and made with high reliability in producing factories among many bond type super-abrasive wheels yet. It is important task for attaining prescribed mechanical components with high reliability to observe the grinding mechanism of ceramics as like generation of cracks and chipping of material during process. Because they considerably effects on the strength characteristic of machined mechanical components. In this study, various surface grinding experiments using resin bond type diamond wheels are carried out for Silicon Nitride ceramic. Grinding mechanism of ceramics is observed experimentally and the relationship with various conditions is also attained. Form this experimental study, some useful machining data and information to determine proper machining condition for grinding of Silicon Nitride ceramic is obtained.

• 동의생리병리학회지
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• 제19권5호
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• pp.1437-1442
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• 2005

Tongue Diagnosis is the important traditional oriental medical diagnosis method that observes not only the general physiological state but also some kinds of disease. However, manual tongue diagnosis is much influenced by surrounding illumination. Therefore, Digital Tongue Inspection System(DigiTis) is needed for the quantification of objective tongue information, In this research, Tongue images of 98 malignant Neoplasm patients and 34 normal persons were collected by Digital Tongue Inspection System. Statistical analysis of tongue images and patient data indicates that cancer group has more blue-purple components in tongue body(舌質) and yellow components in tongue coating than normal group. Also, there are a lot of rose-pink components in the cancer group of second stage and blue-purple components in the cancer group of third or fourth stage. Our study shows that tongue image is a useful index for distinction between disease and health. Furthermore we need more extended research through the additional sampling and various disease.