• Title/Summary/Keyword: generalized system

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Quantifiers in Questions

  • Krifka, Manfred
    • Korean Journal of English Language and Linguistics
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    • v.3 no.4
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    • pp.499-526
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    • 2003
  • This paper, based on Krifka (2001), is about the interpretation of quantifiers in questions. I have argued that quantification into question acts is possible for universal quantifiers, as these quantifiers are based on conjunction, an operation that is defined for speech acts. This explains the restriction to universal quantifiers, which are generalized conjunctions. I have developed a type system in which quantification into question acts can be described. I have argued that expressions that scope out of speech acts must be topic, which explains a number of additional observations. I have also discussed embedded questions, which, depending on the embedding verb, may allow for quantification into questions.

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A Generalized Finite Difference Method for Crack Analysis (일반화된 유한차분법을 이용한 균열해석)

  • Yoon, Young-Cheol;Kim, Dong-Jo;Lee, Sang-Ho
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2007.04a
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    • pp.501-506
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    • 2007
  • A generalized finite difference method for solving solid mechanics problems such as elasticity and crack problems is presented. The method is constructed in framework of Taylor polynomial based on the Moving Least Squares method and collocation scheme based on the diffuse derivative approximation. The governing equations are discretized into the difference equations and the nodal solutions are obtained by solving the system of equations. Numerical examples successfully demonstrate the robustness and efficiency of the proposed method.

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A Robust Discrete-Time Model Reference Adaptive Control in the Presence of Bounded Disturbances (제한된 외란하에서의 강인한 이산 시간 모델 추종 적응 제어)

  • 이호진;함운철;최계근
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.25 no.12
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    • pp.1618-1624
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    • 1988
  • In this paper, a robust discrete model reference adaptive controller is proposed using a generalized model reference adaptive algorithm for single-input single-output discrete systems. A signal dependent time-varying dead-zone is employed in a generalized adaptive control structure. This adaptive controller is shown to assure the boundedness of the signals of the system even in the presence of bounded external disturbance.

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Continuous Maximin Resource Allocations with GLB and GUB Constraints (일반하한 및 일반상한 제약하의 연속 최대최소 자원배분)

  • 원중연;최진영
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.20 no.43
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    • pp.145-152
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    • 1997
  • We present a continuous resource allocation problem with maximin objective functions under the generalized lower bound(GLB) and generalized upper bound(GUB) constraints. This problem is an extension for the problems of previous studies. An efficient algorithm is developed by exploiting extended structural properties, where n is the total number of variables. The worst computational complexity of the proposed algorithm is O(nlogn).

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GENERALIZED SOLUTIONS OF IMPULSIVE CONTROL SYSTEMS AND REACHABLE SETS

  • Shin, Chang-Eon;Ryu, Ji-Hyun
    • Bulletin of the Korean Mathematical Society
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    • v.37 no.1
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    • pp.37-52
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    • 2000
  • This paper is concerned with the impulsive Cauchy problem (equation omitted) where u is a possibly discontinuous vector-valued function and f, $g_{i}$ : $IR^{n}$ -> $IR^{n}$ are suitably smooth functions. We show that the input-output map is Lipschitz continuous and investigate compactness of reachable sets.

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Intelligent robot system (지능 로보트 시스템)

  • 정명진;변증남
    • 제어로봇시스템학회:학술대회논문집
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    • 1986.10a
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    • pp.21-25
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    • 1986
  • An intelligent robot system can be regarded as the most generalized machine system that can perform a variety of tasks under unpredictable and unstructured environment with some intelligence. Robotics research topics related to four functions of the intelligent robot system are discussed. Also current research activities in Japan and Korea are discussed briefly.

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A Self-Tuning PI Control System Design for the Flatness of Hot Strip in Finishing Mill Processes

  • Park, Jeong-Ju;Hong, Wan-Kee;Kim, Jong-Shik
    • Journal of Mechanical Science and Technology
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    • v.18 no.3
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    • pp.379-387
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    • 2004
  • A novel flatness sensing system which is called the Flatness Sensing Inter-stand Looper(FlatSIL) system is suggested and a self-tuning PI control system using the FlatSIL is designed for improving the flatness of hot strip in finishing mill processes. The FlatSIL system measures the tension along the direction of the strip width by using segmented rolls, and the tension profile is approximated through the tension of each segmented roll. The flatness control system is operated by using the tension profile. The proposed flatness control system as far as the tension profile-measuring device works for the full strip length during the strip rolling in finishing mills. The generalized minimum variance self-tuning (GMV S-T) PI control method is applied to control the flatness of hot strip which has a design parameter as weighting factor for updating the PI gains. Optimizing the design parameter in the GMV S-T PI controller, the Robbins-Monro algorithm is used. It is shown by the computer simulation and experiment that the proposed GMV S-T PI flatness control system has better performance than the fixed PI flatness control system.

Analysis of Vertical Journal Bearing with a Helical Groove (헬리컬 그루브를 갖는 수직 동압베어링의 해석에 관한 연구)

  • Park, Sang-Shin;Hwang, Pyung;Kim, Do-Hyung
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1999.06a
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    • pp.175-181
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    • 1999
  • The present work is an attempt to calculate the steady state pressure and perturbed pressure of journal bearings that has a helical groove. A coordinate is fitted to the helical groove and governing equation is derived by applying generalized coodinate system to the divergence formulation method. This method makes it possible to deal with an arbitrary configuration of a lubricated surface. The dynamical response of shaft-bearing system is calculated using the bearing reaction force and external force.

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Power Flow Control of a Multi-bus/Three-feeder Distribution System Using Generalized Unified Power Quality Conditioner

  • Mohammed, B.S.;Ibrahim, R.;Perumal, N.;Rao, K.S. Rama
    • Journal of Electrical Engineering and Technology
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    • v.10 no.1
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    • pp.8-17
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    • 2015
  • This paper analyses the power flow of a three-feeder/multi-bus distribution system by a custom Generalized Power Quality Conditioner (GUPQC). The GUPQC has been realized by three voltage source converters (VSCs) coupled back-to-back through a common DC-link capacitor on the DC-side. One feeder was controlled by the shunt compensator, whereas each of the other two feeders was controlled by the proposed novel series compensator. The GUPQC has the capability to simultaneously compensate voltage and current quality problems of a multi-bus/three-feeder distribution system. Besides that, the power can be transferred from one feeder to other feeders to compensate for poor power quality problems. Extensive simulation studies were carried out by using MATLAB/SIMULINK software to establish the ability of the GUPQC to improve power quality of the distribution systems under distorted supply voltage conditions.