• 제목/요약/키워드: 4P theory

검색결과 615건 처리시간 0.031초

3상 4선 계통에서의 순시전력 보상이론 (Instantaneous Power Compensation Theory in Three-phase Four-wire Systems)

  • 김효성
    • 전력전자학회논문지
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    • 제11권2호
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    • pp.172-183
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    • 2006
  • 본 논문은 Akagi에 의해 발표된 p-q 이론과 Nabae 및 Peng에 의하여 발표된 크로스벡터 이론의 대비를 통하여 3상 4선 계통에서 순시전력보상방법을 분석한다. 3상 3선 계통에서 영상성분 전압이 없는 경우 두 이론은 똑같다. 그렇지만 3상 4선 계통에서 영상성분 전압과 전류가 포함되는 경우, 두 이론은 순시무효전력과 순시유효전력을 달리 정의한다. 본 논문에서는 이론적 분석과 컴퓨터 시뮬레이션을 바탕으로 영상성분 전압과 영상성분 전류가 존재하는 3상 4선 계통에서 에너지 저장요소의 필요 없이 무효전력만의 보상을 통하여 계통의 중성선 전류를 완벽히 제거할 수 있는 순시전력보상방법을 제시한다.

COUNTABILITY AND APPROACH THEORY

  • Lee, Hyei Kyung
    • 충청수학회지
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    • 제27권4호
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    • pp.581-590
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    • 2014
  • In approach theory, we can provide arbitrary products of ${\infty}p$-metric spaces with a natural structure, whereas, classically only if we rely on a countable product and the question arises, then, whether properties which are derived from countability properties in metric spaces, such as sequential and countable compactness, can also do away with countability. The classical results which simplify the study of compactness in pseudometric spaces, which proves that all three of the main kinds of compactness are identical, suggest a further study of the category $pMET^{\infty}$.

CRITICAL POINTS RESULT FOR THE C1,1 FUNCTIONAL AND THE RELATIVE CATEGORY THEORY

  • Jung, Tacksun;Choi, Q-Heung
    • 충청수학회지
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    • 제21권4호
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    • pp.437-445
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    • 2008
  • We show the existence of at least four nontrivial critical points of the $C^{1,1}$ functional f on the Hilbert space $H=X_0{\oplus}X_1{\oplus}X_2{\oplus}X_3{\oplus}X_4$, $X_i$, i = 0, 1, 2, 3 are finite dimensional, with f(0) = 0 when two sublevel subsets, torus with three holes and sphere, of f link, the functional f satisfies sup-inf variatinal linking inequality on the linking subspaces, the functional f satisfies $(P.S.)_c$ condition, and $f{\mid}_{X_0{\oplus}X_4}$ has no critical point with level c. We use the deformation lemma, the relative category theory and the critical point theory for the proof of main result.

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비진언성 이론에 입각한 부정극어 연구 (An Analysis of NPIs based on Nonveridicality Theory.)

  • 김미자
    • 한국영어학회지:영어학
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    • 제2권4호
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    • pp.495-518
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    • 2002
  • This paper is to analyze various phenomena of NPIs based on Nonveridicality Theory. For this purpose, I present the previous studies concerning NPls and examine their problems: Ladusaw's(1980) Downward Entailment and Zwarts'(1993) Monotonicity Theory. To solve their problems I suggest Giannakidou's(1998, 1999, 2000) Nonveridicality Theory. To conclude, this paper clarifies the reason why NPls are licensed and resolves the problems of previous studies. I explain NPIs' phenomena in questions, modals, intentional verbs, before, perhaps and so on. I analyse the examples of NPls in BNC, S&S, P&P to prove my claim.

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기질이론에 근거한 어머니교육 프로그램이 모아기질조화에 미치는 효과 (Effects of a Maternal Education Program Based on the Temperament Theory on the Temperamental Goodness-of-Fit between Mother and Child)

  • 안민순
    • 대한간호학회지
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    • 제35권6호
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    • pp.1044-1053
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    • 2005
  • Purpose: This study was aimed to evaluate the effects of a maternal education program based on the temperament theory on the temperamental goodness-of-fit between mother and child. Method: The research method was a nonequivalent, control group, non-synchronized design and the experimental period was from May 10, 2004 to July 24, 2004. The subjects were mothers who had children 3-4 years old who registered in eight kindergartens or infant schools in M city. Among the total 94 subjects, 47 were allocated as an experimental group and 47 were a control group. Using the SPSS/WIN 10.0 program, the data was analyzed by a Chi-square test, and t-test. Result: 1. After treatment with a maternal education program based on the temperament theory, the experimental group significantly decreased in scores for perceived children's behavior problems in comparison to the control group(t=-4.01, p<.001). 2. After treatment with a maternal education program based on the temperament theory, the experimental group did not significantly decrease in scores for parenting stress in comparison to the control group(t=-.85, p=.40). 3. After treatment with a maternal education program based on the temperament theory, the experimental group did not significantly decrease in scores for rejective parenting behaviors in comparison to the control group(t=-1.32, p=.19). Conclusion: A maternal education program based on the temperament theory is a useful intervention to decrease perceived children's behavior problems.

LIMIT RELATIVE CATEGORY THEORY APPLIED TO THE CRITICAL POINT THEORY

  • Jung, Tack-Sun;Choi, Q-Heung
    • 대한수학회보
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    • 제46권2호
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    • pp.311-319
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    • 2009
  • Let H be a Hilbert space which is the direct sum of five closed subspaces $X_0,\;X_1,\;X_2,\;X_3$ and $X_4$ with $X_1,\;X_2,\;X_3$ of finite dimension. Let J be a $C^{1,1}$ functional defined on H with J(0) = 0. We show the existence of at least four nontrivial critical points when the sublevels of J (the torus with three holes and sphere) link and the functional J satisfies sup-inf variational inequality on the linking subspaces, and the functional J satisfies $(P.S.)^*_c$ condition and $f|X_0{\otimes}X_4$ has no critical point with level c. For the proof of main theorem we use the nonsmooth version of the classical deformation lemma and the limit relative category theory.

MULTIPLICITY RESULTS OF CRITICAL LOCAL EQUATION RELATED TO THE GENUS THEORY

  • Mohsen Alimohammady;Asieh Rezvani;Cemil Tunc
    • 대한수학회논문집
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    • 제38권4호
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    • pp.1045-1061
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    • 2023
  • Using variational methods, Krasnoselskii's genus theory and symmetric mountain pass theorem, we introduce the existence and multiplicity of solutions of a parameteric local equation. At first, we consider the following equation $$\{-div[a(x,{\mid}{\nabla}u{\mid}){\nabla}u]\,=\,{\mu}(b(x){\mid}u{\mid}^{s(x)-2}-{\mid}u{\mid}^{r(x)-2})u\;in\;{\Omega},\\u\,=0\,on\;{\partial}{\Omega},$$ where Ω⊆ ℝN is a bounded domain, µ is a positive real parameter, p, r and s are continuous real functions on ${\bar{\Omega}}$ and a(x, ξ) is of type |ξ|p(x)-2. Next, we study boundedness and simplicity of eigenfunction for the case a(x, |∇u|)∇u = g(x)|∇u|p(x)-2∇u, where g ∈ L(Ω) and g(x) ≥ 0 and the case $a(x,\,{\mid}{\nabla}u{\mid}){{\nabla}u}\,=\,(1\,+\,{\nabla}u{\mid}^2)^{\frac{p(x)-2}{2}}{\nabla}u$ such that p(x) ≡ p.

보건소 방문 어르신 대상 사회적 인지론 적용한 영양교육의 효과 (Effects of an Intervention of Nutrition Education Program based on Social Cognitive Theory for the Elderly Visiting Public Health Center in Jinhae-Province)

  • 서은희
    • 한국식품영양학회지
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    • 제29권3호
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    • pp.313-326
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    • 2016
  • The aim of this study was to evaluate the effects of a nutrition education program for the elderly at a public health center located in Jinhae city. The one group pretest and posttest design was conducted using self-administered questionnaire survey. Nutrition education lessons based on social cognitive theory (2 hours/lesson, 3 times) were provided to 27 female elderly(${\geq}65$ yrs) for a month. After the nutrition education, number of exercise increased and preference for sweetness decreased significantly (p<0.05). The outcome expectations, the knowledge of nutrition (p<0.001), and behavioral capability (p<0.05) score were significantly increased. There were significant increases in all nutrient intake. NAR was increased significantly in protein, calcium and vitamin C (p<0.01), dietary fiber, iron, zinc, thiamin, niacin and folic acid (p<0.001), and riboflavin (p<0.05). INQ was increased significantly in thiamin, vitamin B6 and niacin (p<0.05), and dietary fiber (p<0.01). The score of nutrition education satisfaction was high (4.52). The results of this study suggested that the nutritional education program based on social cognitive theory had a positive effect on dietary behavior changes, and nutrition intake status among female elderly even after short-term intervention.

EXISTENCE OF SOLUTION FOR A FRACTIONAL DIFFERENTIAL INCLUSION VIA NONSMOOTH CRITICAL POINT THEORY

  • YANG, BIAN-XIA;SUN, HONG-RUI
    • Korean Journal of Mathematics
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    • 제23권4호
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    • pp.537-555
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    • 2015
  • This paper is concerned with the existence of solutions to the following fractional differential inclusion $$\{-{\frac{d}{dx}}\(p_0D^{-{\beta}}_x(u^{\prime}(x)))+q_xD^{-{\beta}}_1(u^{\prime}(x))\){\in}{\partial}F_u(x,u),\;x{\in}(0,1),\\u(0)=u(1)=0,$$ where $_0D^{-{\beta}}_x$ and $_xD^{-{\beta}}_1$ are left and right Riemann-Liouville fractional integrals of order ${\beta}{\in}(0,1)$ respectively, 0 < p = 1 - q < 1 and $F:[0,1]{\times}{\mathbb{R}}{\rightarrow}{\mathbb{R}}$ is locally Lipschitz with respect to the second variable. Due to the general assumption on the constants p and q, the problem does not have a variational structure. Despite that, here we study it combining with an iterative technique and nonsmooth critical point theory, we obtain an existence result for the above problem under suitable assumptions. The result extends some corresponding results in the literatures.