• Title, Summary, Keyword: support function

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Power Quality Disturbances Identification Method Based on Novel Hybrid Kernel Function

  • Zhao, Liquan;Gai, Meijiao
    • Journal of Information Processing Systems
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    • v.15 no.2
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    • pp.422-432
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    • 2019
  • A hybrid kernel function of support vector machine is proposed to improve the classification performance of power quality disturbances. The kernel function mathematical model of support vector machine directly affects the classification performance. Different types of kernel functions have different generalization ability and learning ability. The single kernel function cannot have better ability both in learning and generalization. To overcome this problem, we propose a hybrid kernel function that is composed of two single kernel functions to improve both the ability in generation and learning. In simulations, we respectively used the single and multiple power quality disturbances to test classification performance of support vector machine algorithm with the proposed hybrid kernel function. Compared with other support vector machine algorithms, the improved support vector machine algorithm has better performance for the classification of power quality signals with single and multiple disturbances.

The Relationships among Loneliness, Social Support, and Family Function in Elderly Korean (노인의 외로움과 사회적지지, 가족기능간의 관계 연구)

  • 김옥수;백성희
    • Journal of Korean Academy of Nursing
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    • v.33 no.3
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    • pp.425-432
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    • 2003
  • Purpose: To examine the relationships among loneliness, social support, and family function in elderly Korean. Method: The sample for this study were 290 elderly Korean who were at least 60 years of age. Data were collected by interview using the translated Korean versions of the Revised University of California Los Angels Loneliness Scale(RULS), Family APGAR, and Social Support Questionnaire 6. Result: Subjects were moderately lonely and had moderately functional families. Means for social support were 1.42 for network size and 4.09 for satisfaction. Subjects who lived with their spouses had a larger number of network members than who did not live with spouses. However, living with spouses was not associated with social support satisfaction. The level of loneliness was related negatively to the level of social support network, social support satisfaction and family function in this study. Social support satisfaction and Family function were the significant predictor of loneliness. Conclusion: The number of social supporter and satisfaction and family function should be considered in nursing intervention to decrease the level of loneliness in older adults. Further studies and efforts will be needed to reduce the level of loneliness in older adults.

Child Maltreatment and Resilience : Mediating Effects of Cognitive Function and Social Support (아동학대와 탄력성의 관계에서 인지기능과 사회적 지지의 매개효과)

  • Ju, So-Young;Lee, Yanghee
    • Korean Journal of Child Studies
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    • v.29 no.3
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    • pp.127-156
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    • 2008
  • This study aimed to verify the mediating effects of cognitive function and social support and to establish a structural relationship between child maltreatment and resilience in school-age children (n=357) taken in by child protection service. In the first model (linear arrangement), each protective factor mediates independently between maltreatment and resilience; in the second model (arrangement in due order), cognitive function has mediating effects prior to social support. Analysis of data included descriptive statistics, Cronbach's a, confirmatory factor analysis, and structural equation modeling. Results of the first model showed indirect effects of cognitive function and social support. Results of the second model significantly affirmed that the mediators, cognitive function and social support, diminish negative effects of maltreatment by bolstering resilience.

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Impact of Self-esteem, Family Function and Social Support on Stress in Undergraduate Students (자아존중감, 가족기능 및 사회적 지지가 대학생의 스트레스에 미치는 영향)

  • Ha, Ju-Young
    • Journal of Korean Academy of Fundamentals of Nursing
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    • v.17 no.2
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    • pp.259-266
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    • 2010
  • Purpose: The purpose of this study was to investigate self-esteem, family function, and social support which might influence stress in college students. Method: Data were collected from October 15 to December 20, 2007 when 411 students completed a questionnaire which included Self-esteem scale, Family APGAR questionnaire, Multidimensional Scale of Perceived Social Support and Global Assessment of Recent Stress scale. The collected data was analyzed with the SPSS Win 14.0 statistics program. Results: The scores for stress showed significantly negative correlations with the scores for self-esteem (r= -.394, p<.001), family function (r= -.215, p<.001), and social support (r= -.249, p<.001). Self-esteem, family function and social support by friends were significant predictors and accounted for 18.5% of the variance in stress in undergraduate students. Conclusion: Future stress management programs for undergraduate students should be developed to reinforce self-esteem, family function and social support by friends.

A study of Family Function and Social Support toward Perceived Quality of Life in Adolescents (청소년이 지각한 가족기능, 사회적 지지 및 삶의 질에 관한 연구)

  • Kwon, Mi-Kyung;Ahn, Hye-Young;Song, Mi-Ryeong
    • Child Health Nursing Research
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    • v.12 no.2
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    • pp.180-188
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    • 2006
  • Purpose: The purpose of this study was to explore family function, social support, perceived quality of life(QOL) in adolescent period and to find out the correlations between family function, social support, perceived QOL in adolescents. Method: The questionnaire to get some information for this study consisted of adolescents'general characteristics, 20 questions regarding family function, 11 questions regarding social support, 8 questions regarding perceived QOL in adolescents. The subjects of this study consisted of 128 adolescents who were living in S area. The data were analyzed by percentage, mean, t-test, ANOVA and Pearson's correlation using the WINSPSS program. Result: The mean score for family function was 3.07(max. : 5) and there was significant difference according to middle-high school student. The mean score for social support was 2.86(max : 5) and there was no significant difference. The mean score for perceived QOL was 4.02(max score: 7) and there was significant difference according to disease condition. There was a positive correlation between family function, social support, perceived QOL in adolescents. Conclusion: Consequently, the development of program, policy assistance and policy implementation to elevate juveniles' perceived quality of life is strongly required.

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Generalized Support Vector Quantile Regression (일반화 서포트벡터 분위수회귀에 대한 연구)

  • Lee, Dongju;Choi, Sujin
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.43 no.4
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    • pp.107-115
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    • 2020
  • Support vector regression (SVR) is devised to solve the regression problem by utilizing the excellent predictive power of Support Vector Machine. In particular, the ⲉ-insensitive loss function, which is a loss function often used in SVR, is a function thatdoes not generate penalties if the difference between the actual value and the estimated regression curve is within ⲉ. In most studies, the ⲉ-insensitive loss function is used symmetrically, and it is of interest to determine the value of ⲉ. In SVQR (Support Vector Quantile Regression), the asymmetry of the width of ⲉ and the slope of the penalty was controlled using the parameter p. However, the slope of the penalty is fixed according to the p value that determines the asymmetry of ⲉ. In this study, a new ε-insensitive loss function with p1 and p2 parameters was proposed. A new asymmetric SVR called GSVQR (Generalized Support Vector Quantile Regression) based on the new ε-insensitive loss function can control the asymmetry of the width of ⲉ and the slope of the penalty using the parameters p1 and p2, respectively. Moreover, the figures show that the asymmetry of the width of ⲉ and the slope of the penalty is controlled. Finally, through an experiment on a function, the accuracy of the existing symmetric Soft Margin, asymmetric SVQR, and asymmetric GSVQR was examined, and the characteristics of each were shown through figures.

Support vector regression with the weighted absolute deviation error loss function

  • Jung, Kang-Mo
    • Journal of the Korean Data and Information Science Society
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    • v.29 no.6
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    • pp.1707-1719
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    • 2018
  • In this paper we propose robust support vector regression algorithms to deal with noisy data sets. We adopt the absolute deviation error function for a loss function of regression model, and the proposed algorithms preserves the structure of the least squares support vector regression. The proposed algorithms are very fast and the procedures are much simpler than other support vector machine algorithms. They are robust to regression outliers, because the loss functions are less increasing than the squares error function for large errors and it uses a weight function for each observation. By comparing the proposed algorithms with other methods for the simulated datasets and benchmark datasets, the proposed methods are more robust than the least squares support vector regression when outliers exist.

Effect of Mekenzie Lumbar Support on Pulmonary Function for Wheelchair Patients with Stroke

  • Park, Shin Jun;Kim, Soon Hee
    • Journal of International Academy of Physical Therapy Research
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    • v.9 no.2
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    • pp.1494-1497
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    • 2018
  • This study aimed to determine the effect of McKenzie lumbar support on pulmonary function in Stroke patients. Twenty subjects (n=20) were divided into two groups: a McKenzie lumbar support group (MLS group=10), a control group (n=10). Pulmonary function was performed to assess its effectiveness. A spirometer was used to measure the forced vital capacity (FVC), forced expiratory volume in one second (FEV1), peak expiratory flow (PEF). The intervention was conducted for four weeks. In the MLS group, FEV1, FVC, and PEF were increased after McKenzie lumbar support. (p<0.05), while no significant differences in the variables were found in the control group (p>0.05). There were no significant differences in variables between the MLS group and the control group (p>0.05). Our findings suggest that applying Mckenzie lumbar support may be an alternative maneuver to improve pulmonary function in stroke patients.

A Study on the Correlations between Family Function, Social Support And perceived Mother's Love in the Adolescents (청소년의 가족기능.사회적 지지와 지각된 어머니 사랑간의 관계연구)

  • Song, Mi-Ryeong
    • Journal of Korean Academy of Community Health Nursing
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    • v.12 no.3
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    • pp.785-794
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    • 2001
  • Purpose: This study was to find out the correlations amongst family function. social support. and the perceived mother's love in the adolescents. Method: The study subjects were 171 adolescents of whom 43 were middle school students and 128 were high school students. The data consisted of general characteristics. family function. social support and perceived mother's love. The data were analyzed by frequency. mean. percentage. t-test. ANOVA and the Pearson's correlation using the SPSS statistical program. Result: 1. The mean score of the family function in the adolescents was 3.09 (maximum score: 5) and the mean score of cohesion was 3.23 and the mean score of adaptability was 2.94. There were significant differences in the family function according to grade and family type. 2. The mean score of the social support in the adolescents was 2.86 (maximum score: 5) and there was significant difference in the social support according to the fathers occupation. 3. The mean score of the perceived mother's love in the adolescents was 3.57 (maximum score: 5) and there were significant differences in the perceived mother's love according to grade. existence of the mother, the mother's occupation and adolescent's health state. 4. There were positive correlations between the family function, social support and the perceived mother's love. Conclusion: The above results suggest that there is a need to develop social support program for the adolescents in the low economic status. Further, a comprehensive program should be developed to relieve the problems of the adolescents considering the family function. social support and perceived mother's love.

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