• Title/Summary/Keyword: equivalence problem

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A Study On the Integration Reasoning of Rule-Base and Case-Base Using Rough Set (라프집합을 이용한 규칙베이스와 사례베이스의 통합 추론에 관한 연구)

  • Jin, Sang-Hwa;Chung, Hwan-Mook
    • The Transactions of the Korea Information Processing Society
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    • v.5 no.1
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    • pp.103-110
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    • 1998
  • In case of traditional Rule-Based Reasoning(RBR) and Case-Based Reasoning(CBR), although knowledge is reasoned either by one of them or by the integration of RBR and CBR, there is a problem that much time should be consumed by numerous rules and cases. In order to improve this time-consuming problem, in this paper, a new type of reasoning technique, which is a kind of integration of reduced RB and CB, is to be introduced. Such a new type of reasoning uses Rough Set, by which we can represent multi-meaning and/or random knowledge easily. In Rough Set, solution is to be obtained by its own complementary rules, using the process of RB and CB into equivalence class by the classification and approximation of Rough Set. and then using reduced RB and CB through the integrated reasoning.

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A Numerical Analysis of the NO Emission Characteristics in $CH_4/Air$ Counterflow Premix Flame (메탄/공기 대향류 예혼합화염의 NO 발생특성에 관한 수치해석)

  • Cho, Eun-Seong;Chung, Suk-Ho
    • Journal of the Korean Society of Combustion
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    • v.9 no.4
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    • pp.22-27
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    • 2004
  • Lean premix combustion is a best method in low $NO_x$ gas turbine combustor and we must know the characteristics of NO emission in high temperature and pressure condition in premix flame. Numerical analysis was performed to investigate the NO emission characteristics by adopting a counterflow as a model problem using detailed chemical kinetics. Methane $(CH_4)$ was used as a test fuel which is the main fuel of natural gas. The tested parameters were stretch rate, equivalence ratio, initial temperature, and pressure in premix flame. Results showed that NO emission was high in low stretch rate, near stoichiometric equivalence ratio, high initial temperature, and high pressure. Also, the pressure effect was sensitive in high temperature condition.

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Discriminative Models for Automatic Acquisition of Translation Equivalences

  • Zhang, Chun-Xiang;Li, Sheng;Zhao, Tie-Jun
    • International Journal of Control, Automation, and Systems
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    • v.5 no.1
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    • pp.99-103
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    • 2007
  • Translation equivalence is very important for bilingual lexicography, machine translation system and cross-lingual information retrieval. Extraction of equivalences from bilingual sentence pairs belongs to data mining problem. In this paper, discriminative learning methods are employed to filter translation equivalences. Discriminative features including translation literality, phrase alignment probability, and phrase length ratio are used to evaluate equivalences. 1000 equivalences randomly selected are filtered and then evaluated. Experimental results indicate that its precision is 87.8% and recall is 89.8% for support vector machine.

A Basic Analysis of Performance of Turbo CI Engine based on Stirling Cycle (스털링 사이클을 기본으로 하는 과급 CI 엔진의 기초 성능 분석)

  • 배종욱
    • Journal of Advanced Marine Engineering and Technology
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    • v.24 no.5
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    • pp.76-85
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    • 2000
  • Stirling cycle was actualized as so called ‘hot air engine’. It has been focused again lately as one of measures for exhaust gas emission problem, but as small power engine because of its method of heat addition. Recently marine power plants commenced to meet a stringent environmental restrictions by international convention, Marpol so that diesel engines as main and auxiliarly power plants are urged to be reformed to reduce NOx emission. Author devised a compression ignition engine as a large marine power plants combined with turbo charger based on stirling cycle, and analyzed the performance by means of basic thermodynamic calculation. Analyzed in this paper, were theoretical efficiency, mean effective pressure, required equivalence ratio, gas turbine power ratio, maximum pressure, states of turbo-charger inlet gas and exhaust gas, manifesting that the engine could be proposed as one of the future power plants of marine use.

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Semantic Prosody and Meaning Equivalence: Is Korean pin konggan Equivalent to ‘Empty Space’ or ‘Blank Space’\ulcorner (의미운률과 의미 등가성: ‘빈 공간’은 ‘empty space’인가 ‘blank space’인가\ulcorner)

  • 조의연
    • Korean Journal of English Language and Linguistics
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    • v.3 no.4
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    • pp.589-609
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    • 2003
  • The purpose of this paper is to show that lexical equivalency in translation can be achieved when it is based on semantic prosodies of lexical items. This paper examines the semantic prosodies of two seemingly synonymous English adjectives ‘empty’ and ‘blank’ on the basis of the corpus given in Cobuild English Collocations on CD-ROM and proposes that they are different in terms of spatial dimensions. Thus when a Korean equivalent pin derived from the verb pita is translated into English, syntagmatic phraseological environments of the Korean adjective must be taken into account to attain the equivalency of the source and target languages. Relevant Korean corpus was taken from the 21st Century Sejong Plan (2002). Out of 12 examples of pin konggan, five appear to be equivalent to ‘blank’ and seven to ‘empty.’ The five to seven ratio in different usage indicates that the equivalency problem concerning the lexical item pin is not a trivial matter in translation.

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Latent Mean Analysis of Health Behavior between Adolescents with a Health Problem and Those without: Using the 2009 Korean Youth Health Behavior Survey

  • Park, Jeong-Mo;Kim, Mi-Won;Cho, Yoon Hee
    • Research in Community and Public Health Nursing
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    • v.24 no.4
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    • pp.488-497
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    • 2013
  • Purpose: The purpose of this study was to identify the construct equivalence of the general five factors of health behavior and to compare the latent means between adolescents with a health problem and those without in Korea. Methods: The 2009 KYRBS (Korean Youth Risk Behavior Survey) data were used for the analysis. Multi-group confirmatory factor analysis was performed to test whether the scale had configural, metric, and scalar invariances across the existence of health problems in adolescents. Results: Configural, metric, and factor invariances were satisfied for the latent mean analysis (LMA) between adolescents with health problem and those without. Adolescents with health problem and those without were not different in the LMA of all factors. Conclusion: Health providers should give more interest to the group of adolescents with health problems and consider prudential school life to the same group.

A Study on the Mathematical Equivalence and $\varepsilon$-Relaxation of Auction Algorithm for PCB Design (PCB 설계를 위한 Auction 알고리즘의 수학적 등가와 $\varepsilon$-이완법에 관한 연구)

  • 우경환;이용희;임태영;이천희
    • Proceedings of the IEEK Conference
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    • 2000.06b
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    • pp.213-216
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    • 2000
  • Minimum-cost linear network flow problems could be transformed with equal to assignment problems. Traditional method to solve the linear network flow problems are improved source-cost by transform the simple cycle flow. Auction algorithm could be applied to same element using the initial target price and dispersion calculation. Also, each elements are obtained by $\varepsilon$-relaxation methods. In this paper we proposed; 1)minimum-cost flow problem, 2)minimum-cost flow problem by the mathematical equivalent and 3) extraction $\varepsilon$-relaxation & expand transfer problem with minimum-cost flow. It can be applicant to PCB design by above mentioned.

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GENERALIZED SET-VALUED MIXED NONLINEAR QUASI VARLIATIONAL INEQUALITIES

  • H, M-U
    • Journal of applied mathematics & informatics
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    • v.5 no.1
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    • pp.73-90
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    • 1998
  • In this paper we introduce and study a number of new classes of quasi variational inequalities. using essentially the projection technique and its variant forms we prove that the gen-eralized set-valued mixed quasivariational inequalities are equivalent to the fixed point problem and the Wiener-Hopf equations(normal maps). This equivalence enables us to suggest a number of iterative algorithms solving the generalized variational inequalities. As a special case of the generalized set-valued mixed quasi variational in-equalities we obtain a class of quasi variational inequalities studied by Siddiqi Husain and Kazmi [35] but there are several inaccuracies in their formulation of the problem the statement and the proofs of the problem the statement and the proofs of their results. We have removed these inaccuracies. The correct formulation of thir results can be obtained as special cases from our main results.

Mixed $H_2/H_{\infty}$ Controller Design Considering Minimum Entropy (최소 엔트로피를 고려한 혼합 $H_2/H_{\infty}$ 제어기 구성)

  • Lee, Sang-Hyuk;Seo, Jin-H.
    • Proceedings of the KIEE Conference
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    • 1996.07b
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    • pp.999-1001
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    • 1996
  • In this paper, we represented the relation of minimum entropy/$H_{\infty}$-controller and mixed $H_2/H_{\infty}$-controller. An $H_2$ controller design problem involving a constraint on $H_{\infty}$ disturbance attenuation is considered. By the equivalence of the mixed $H_2/H_{\infty}$ control problem and the minimum entropy/$H_{\infty}$-control problem, we presented the controller state-space realization. Decentralized case was illustrated briefly.

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Smith-purcell radiation by a periodic strip grating over a grounded dielectric slab (접지된 유전체층 위의 주기적인 스트립격자에 의한 smith-purcell 복사)

  • 조웅희;이철훈;이종익;김병민;조영기
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.35D no.2
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    • pp.19-24
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    • 1998
  • The problem of Smith-Purcell radiation by a strip grating over a groundeddielectric slabl is analyzed by use of the equivalence principle, Floquet's theorem, and the method of moment. the relative radiation intensities of the space harmonics, computed by use of the proposed method, for the appropriately chosen charge velocities and grating dimensions are presented. In particular, some relationships between the smith-purcell radiation and the leaky-wave radiation in the proposed geometry are investigated.

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