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- 저자 : 沈元燮 (검색결과 142 건)
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沈元燮 서울産業大學校 1978 논문집 Vol.11 No.1
本 論文에서는 多値論理函數를 實現하기 爲한 多値多重 Threshold 回路綱(MVTN, Mutivalued Threshold Network)에 關하여 考案하였다. 硏究의 核心은 多値函數를 多値多重 Threshold 函數로 變換하는것과 MVTN에 回路綱을 合成하는데 두었으며 MVTN에 對하여 다음 3가지 点에 重点을 두어 考察하였다. 1) 어떤 任意의 多値函數를 MVTN 回路綱으로 實現한다. 2) MVTN은 一般的 Threshold 要素를 가지고 構成한다. 그리고 3) 2値多重 Threshold 回路綱에서 쓰이고 있는 여러가지 合成過程을 MVTN 回路綱 構成에 適用한다. In this paper, we consider multivalued multithreshold networks (MVTN') to realize multivalued logic function. Transformation of multivalued function into multivalued multithreshhold functions, and network syntheses for MVTN's are described. There are three emphases on the MVTN's : 1)any arbitrary multivalued function can be realized by an MVTN, 2)an MVTN can be composed of conventional threshold elements, 3)various synthesis procedures for binary multithreshold networks can be applied to MVTN's.
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沈元燮 서울産業大學校 1988 논문집 Vol.28 No.1
This research has presented a new approach to the classical sampling problem. It has used the mathmatical tools of almost periodic (AP) function theory to develop a nonuniform sampling theory based upon almost periodic extension of the Fourier transform of a band limited function signal.
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Dual-Slope A/D 變換器의 Off-set 誤差除去에 關한 硏究
沈元燮 서울産業大學校 1982 논문집 Vol.16 No.1
A new methode of eliminating offset error from a dual-slope Analog-to-digital conerter is described. Two dual-slope cycles, each with the same fixed time period, are needed for a complete conversion. The converter differs from other converters in that the sum and difference of the unknown and reference voltage, as well as the voltage themselves are integrated. Different combinations yield a number of error-free converter in which the ratio of the two voltages is equal to the ratio of the sum or difference of two time periods. The Converters also have a limited computational capability in that useful outputs other than the ratio of the unknown and reference voltages can be obtained. For some of the converters the sum or difference of two time periods yield an output with greatly reduced offset error. Another sum of difference provides a correction factor. In addition, some of the converters require a single reference voltage for the entire positive and negative range of the unknown voltage.
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低域 通過 信號의 多重 Channel 標本化에 關한 硏究
沈元燮 서울産業大學校 1987 논문집 Vol.25 No.1
A single signal X(t) band limited to │ω│<σ is passed through m linear time-invariant filters (channels) to obtain the m outputs Z₁(t),....., ?? (t). If the filters are independent in a range within defined, then it is shown that the common input X(t) may be reconstructed from samples of the outputs [??], each output being sampled at σ/(mπ) samples per second or (1/m)th the rate associated with the input signal. the derivation of this result is given which proceeds from a minimum error energy criterion and leads to a system of linear algebraic equations for the optimal reconstruction filters. The system of equations derived bere has the advantage of depending on only one parameter ω rather than on the two parameters ωand t.
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沈元燮 서울産業大學校 1989 논문집 Vol.30 No.1
In this paper, an optimal quantizer for input signals distorted by noise is designed. It is known from this study how to design optimal quantizer for input signals with a given probability density function. Also some numerial results for processes with a Gaussian probability density functions are abtained.
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김선종,심원섭 우송대학교 1999 우송대학교 논문집 Vol.4 No.-
This paper discusses the variables lying in operating foodservice outside hotel and presents a new recommendations for the future F & B management. Nowadays, many korean hotel corporations engaged in outsides foodservice management as they tried to take use of the competive advantages of F & B department. They entered in many management formats such as ownership, franching, management contract, joint venture. The aim of this study is to find significant factors making. To accomplish this aim, at first through related literature review os conducted to design empirical survey model. By review of the theoretical and approach method, the outside foodservice management strategy derterminants are competitive advantage factors, value-added factors, entry barrier factors. These are dependent variables. And hotel's characterristic factors are hotel size, management style, and management format. These factors are independent variables. The hypothesis of this study are as follow: 1. H1 : There will be a difference in competitive advantage factors of Korean hotel corporations which they had before entered foodservice industry by its the characteristics of hotel. 2. H2 : There will be a difference in value-added factors of Korean hotel corporations which they will have after enter foodsrevice industry by its the characteristics of hotel. 3. H3 : There will be a difference in entry barrier factors of Korean hotel corporations which they have when enter foodsrevice industry by its the characteristics of hotel. 4. H4 : There will be a difference in the rightness of management format by management format which they used. Finding of empirical analysis are : First, There are difference between the specialization of houman resources and the characteristics of hotel. Second, There are difference between the imagenation of hotel, the grasp of potential customers and the characteristics of hotel. Third, There are difference between the increase of cost, competition and the characteristics of hotel. Therefore these factors should be sufficiently considered to manage outside hotel foodservice.
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P函數에 依한 Microprogram型 制御裝置의 最適化 設計에 關한 硏究
沈元燮 서울産業大學校 1986 논문집 Vol.23 No.1
This paper deals with a method of transformation and optimization of programs. The presented algorithm abtains, for any given program, an equivalent one with a minimum number of conditional instructions. Finaly optimal conditional program for implementing a simple digital system is developed.
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