• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1562-1568
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• 2011

This paper is intended as an verification of moving load simulation techniques. The concern with dynamic problem of railway bridge caused by the moving train loads has been growing. Over the past few years, several studies have been made on dynamic stability of railway bridge analytically. But very few attempts have been made at experimental research. From the dynamic stability view point, the moving train loads simulation test is revolutionary idea. It can be replace restrictive filed test with new laboratory test. This study investigates minimum specifications of hardware and basic parameters. it is used 12m girder and high performance actuator for experimental verification.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 추계학술대회 논문집
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• pp.225-228
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• 2009

The simulated indoor pass-by noise measurement system is the tool to measure and evaluate the pass-by noise at the test laboratory, without doing measurement at the field. This measurement system can realize the precision measurement under the specific condition and overcome the limitations of the field measurement, i.e. weather conditions, repeatability, .. This measurement system is done in time domain process using the array techniques, which synchronizes the time signals. The reliability of the obtained result depends on the array shapes, which can generate the moving source effect. In this paper, the validations are checked focusing the time domain synchronization of the signals with the optimum microphone array shape.

• 경영과학
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• 제21권3호
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• pp.55-69
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• 2004

This study analyzes customer buying-behavior patterns in a department store as time goes on, and predicts moving patterns of its customers. Through them, it suggests in this paper short-term and long-term marketing promotion strategies. RFM techniques are utilized for customer segmentation. Customers are clustered by using the Kohonen's Self Organizing Map as a method of data mining techniques. Then C5.0, a decision tree analysis technique, is used to predict moving patterns of customers. Using real world data, this study evaluates the prediction accuracy of predictive models.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.2531-2533
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• 2005

The proposed neural network technique is the real time computation method based theory of inter-node diffusion for searching the safety distances from the sudden appearance-objects during the work driving. The main steps of the distance computation using the theory of stereo vision like the eyes of man is following steps. One is the processing for finding the corresponding points of stereo images and the other is the interpolation processing of full image data from nonlinear image data of objects. All of therm request much memory space and time. Therefore the most reliable neural-network algorithm is drived for real-time matching of obejects, which is composed of a dynamic programming algorithm based on sequence matching techniques in moving objects.

• 한국정밀공학회지
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• 제12권11호
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• pp.110-117
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• 1995

This study presents and algorithm and related techniques which could satisfy the important properties of check weighers and conveyor scales. The algorithm of Recursive Least Squares Regression is applied for the weighing system simulated as a dynamic model of the second order. Using the model and the algorithm, model parameters and then the mass being weighed can be determined from the step input. The performance of the algorithm was tested on a check weigher. Discussions were extended to the development of noise reduction techniques and to the lagged introduction of objects on the moving plate. It turns out that the algorithm shows several desirable features suitable for real-time signal processing with a microcomputer, which are high precision and stability in noisy environment.

• 대한정형도수물리치료학회지
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• 제2권1호
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• pp.39-49
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• 1996

The techniques of joint mobilization and traction are used to improve joint mobility or to decrease pain by restoring accessory movements to the shoulder joints and thus allowing full, nonrestriced, pain-free range of motion. In the glenohumeral joint, the humeral head would be the convex surface, while the glenoid fossa would be the concave surface. The medial end of the clavicle is concave anterioposteriorly and convex superioinferiorly, the articular surface of the sternum is reciprocally curved. The acromioclavicular joint is a plane synovial joint between a small convex facet on lateral end of the clavicle and a small concave facet on the acromion of the scapula. The relationship between the shape of articulating joint surface and the direction of gliding is defined by the convex-concave rule. If the concave joint surface is moving on a stationary convex surface, gliding occur in the same direction as the rolling motion. If the convex surface is moving on a stationary concave surface, gliding will occur in an opposite direction to rolling. Hypomobile shoulder joint are treated be using a gliding technique.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제49권11호
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• pp.749-756
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• 2000

Detent force develops generally undesirable effect that contributes to the output ripple of machine, vibration and noise. This paper proposes detent force minimization techniques for a Permanent Magnet Linear Synchronous Motor (PMLSM). In addition, thrust according to each minimization technique is estimated to observe the change of machine performance. A two-dimensional Finite Element Method is used to predict detent force and thrust due to structural factors and non-linearity. And moving node technique for geometric models is proposed to reduce modeling time and efforts.

• Communications for Statistical Applications and Methods
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• 제31권1호
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• pp.87-104
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• 2024

Most functional magnetic resonance imaging (fMRI) studies in resting state have assumed that the functional connectivity (FC) between time series from distinct brain regions is constant. However, increased interest has recently been in quantifying possible dynamic changes in FC during fMRI experiments. FC study may provide insight into the fundamental workings of brain networks to brain activity. In this work, we focus on the specific problem of estimating the dynamic behavior of pairwise correlations between time courses extracted from two different brain regions. We compare the sliding-window techniques such as moving average (MA) and exponentially weighted moving average (EWMA), dynamic causality with vector autoregressive (VAR) model, dynamic conditional correlation (DCC) based on volatility, and the proposed alternative methods to use differencing and recursive residuals. We investigate the properties of those techniques in a series of simulation studies. We also provide an application with major depressive disorder (MDD) patient fMRI data to demonstrate studying dynamic correlations.

• 한국공간정보시스템학회 논문지
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• 제9권1호
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• pp.59-77
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• 2007

모바일 환경의 대중화와 이를 위한 기반 기술의 발전으로 인하여 이동 객체들을 효과적으로 표현하고 분석하는 것이 중요한 문제로 대두되고 있다. 이러한 환경에서 이동 객체 궤적의 유사성 검색은 궤적에 대한 데이터 마이닝의 일부분으로 중요한 연구 분야중의 하나이다. 본 논문에서는 도로 네트워크상의 이동 객체 궤적을 위한 시공간 유사 궤적 검색 알고리즘을 제안한다. 이를 위하여 도로 네트워크상에서 두 이동 객체 궤적 사이의 시공간 거리를 정의하고, 이를 기반으로 궤적 사이의 시공간 유사도 측정 방법을 제안한다. 유사 궤적 알고리즘은 효율적인 검색을 위하여 시그니쳐 파일 기법을 이용하여 궤적을 검색한다. 마지막으로, 본 논문에서 제안하는 시공간 유사 궤적 검색 알고리즘을 구현하고, 성능 분석을 통해 제안하는 알고리즘의 효율성을 입증한다.

• 한국정보통신학회논문지
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• 제8권6호
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• pp.1266-1272
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• 2004

위치 기반 서비스는 이동체의 위치에 종속적인 결과를 얻는 위치 기반 질의를 필요로 한다. 이동체의 위치는 연속적으로 변하기 때문에, 이동체의 색인은 변경된 위치 정보를 유지하기 위하여 빈번한 갱신 연산을 수행해야 한다. 기존의 공간 색인들(그리드 파일, R-트리, KDB-트리 등)은 정적 데이터를 검색하는데 효과적인 색인이다. 이들 색인은 연속적으로 위치 데이터가 변경되는 이동체 데이터베이스의 색인으로는 적합하지 않다. 본 논문에서는 삽입/삭제 비용이 적은 동적 해슁 색인을 제안한다. 동적 해슁 색인 구조는 해쉬와 트리를 결합한 동적 해슁 기술을 공간 색인에 적용한 것이다. 실험 결과에서 동적 해슁 색인은 $R^*$-tree와 고정 그리드 보다 성능이 우수하였다.