• Journal of applied mathematics & informatics
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• 제23권1_2호
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• pp.435-443
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• 2007

An important approach towards solving the scattered data problem is by using radial basis functions. However, for a large class of smooth basis functions such as Gaussians, the existing theories guarantee the interpolant to approximate well only for a very small class of very smooth approximate which is the so-called 'native' space. The approximands f need to be extremely smooth. Hence, the purpose of this paper is to study approximation by a scattered shifts of a radial basis functions. We provide error estimates on larger spaces, especially on the homogeneous Sobolev spaces.

• 경영과학
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• 제10권2호
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• pp.43-59
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• 1993

A production control information system developed for multi-product, small-lot-sized production is presented. The system is composed of interrelated modules for production planning, shop floor control, and inventory/material management. The architecture of the system, functions of each module, and information processing procedures of each function are discussed.

• 한국산림과학회지
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• 제97권1호
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• pp.71-76
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• 2008

본 연구에서는 공유림의 기능평가를 수행하기 위한 효율적인 평가단위를 결정하고자 하였다. 이러한 기능평가 단위로써 대유역, 중유역 그리고 소유역 단위의 평가방법을 고려하였다. 공유림의 경우 소유주체가 일원화 되지 않고 각 시 군의 행정권이 분산화 되어있으며, 산림의 규모가 영세한 특징이 있어 지번 단위의 평가방법은 공유림의 기능평가 단위로 적합하지 않다. 이에 따라 공유림 기능평가에 적합한 평가단위를 결정하기 위하여 집수량 기준에 따라 소 중 대유역으로 구분하고 각각에 대하여 산림기능평가를 수행하고 타당성을 검토하였다. 각 평가단위에 따른 기능평가 결과에서는 유역단위 기능 구분 시 공유림의 소규모 산지들을 일정 규모 이상의 산지로 집단화할 수 있는 장점이 있었다. 각 평단단위 별로는 소유역 단위에서 중 대유역 단위로 갈수록 산림의 기능이 지나치게 단순화 되는 경향이 나타나 소유역 단위의 기능구분이 공유림의 산림기능평가에 적합한 것으로 나타났다.

• 교육시설
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• 제21권2호
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• pp.25-28
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• 2014

• Kyungpook Mathematical Journal
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• 제14권2호
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• pp.185-194
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• 1974

• Journal of Power Electronics
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• 제17권4호
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• pp.884-891
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• 2017

The improved transfer functions of the modified Sheppard-Taylor (MS-T) converter, which is capable of regulating output voltage under a wide range of input voltage and load variations, negligible current ripple, and fewer components in comparison to the Sheppard-Taylor (S-T) converter, operating in continuous conduction mode (CCM) are investigated in this study. Its DC equilibrium point, small signal model, and transfer functions are derived and analyzed. Then, the voltage controller is applied for this MS-T converter. The comparisons between the derived model and the existing model are presented. The hardware circuit is designed and the circuit experiments are provided for validation. The results show that the improved transfer functions of the MS-T converter are more effective and general than the previous ones for describing its real characteristics.

• 산업경영시스템학회지
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• 제18권36호
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• pp.193-203
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• 1995

The production management system software which can be applied In the medium and small companies is developed. Since the medium and small companies hesitate to install the computer system for production management owing to the lack of funds and the complexities of operation, the system is made to be used in PC and only requires minimum input data. This system is composed of interrelated modules for receive/order release, inventory management MRP, new product registration, document management and production scheduling. In this paper the architecture of the system, functions of each module, and information processing procedures of each funtion are discussed.

• Journal of applied mathematics & informatics
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• 제39권5_6호
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• pp.839-850
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• 2021

In this paper, we investigate the uniqueness problems of certain types of difference-differential polynomials of entire functions sharing a small function. The results of the paper improve and generalize the recent results due to Biswajit Saha [18].

• 대한원격탐사학회지
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• 제24권1호
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• pp.57-64
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• 2008

In the previous study, the Haar wavelet was used as the sole basis function for the 3D discrete wavelet transform because the number of bands is too small to decompose a remotely sensed image in band direction with other basis functions. However, it is possible to use other basis functions for wavelet decomposition in horizontal and vertical directions because wavelet decomposition is independently performed in each direction. This study aims to classify a high spatial resolution image with the six types of basis function including the Haar function and to compare those results. The other wavelets are more helpful to classify high resolution imagery than the Haar wavelet. In overall accuracy, the Coif4 wavelet has the best result. The improvement of classification accuracy is different depending on the type of class and the type of wavelet. Using the basis functions with long length could be effective for improving accuracy in classification, especially for the classes of small area. This study is expected to be used as fundamental information for selecting optimal basis function according to the data properties in the 3D DWT based image classification.

• 통합자연과학논문집
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• 제5권4호
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• pp.216-219
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• 2012

Structure-based drug design possibly benefit from in silico methods that precisely predict the binding affinity of small molecules to target macromolecules. There are many limitations arise from the difficulty of predicting the binding affinity of a small molecule to a biological target with the current scoring functions. There is thus a strong interest in novel methodologies based on MD simulations that claim predictions of greater accuracy than current scoring functions, helpful for a regular use designed for drug discovery in the pharmaceutical industry. Herein, we report a short review on free energy calculations using MMPBSA method a useful method in structure based drug discovery.