압밀침하량 예측에 관한 고찰

李興吉 충주대 2003 産業科學論文集 Vol.11 No.-

There are many problems to predict the consolidation settlement on soft ground during the ground improvement period installing the vertical drains and preloadings. In these case, the important factor for the settlement controls are the predicting final consolidation settlement, time intervals also the height of preloading and so on. For these purpose, an observational methods are proposed by several investigators such as Asaoka, hyperbolic, √t method. The Asaoka method almost is coincide with the field measuring data, and the Hyperbolic method is slightly overestimated, on the other hand, √ method does not coincide with field data.

忠北地域 鑛山 廢石의 알칼리 潛在 反應性에 關한 硏究 : 化學法 Chemical method

류현기 충주대 산업과학기술연구소 1995 産業科學論文集 Vol.3 No.-

The aim of this study is to understand whether it is possible to the aggregate of concrete as a structural material by using mine-waste generated by products about the mine in Chungbuk area as a part of the counterplan of the drain of the aggregate resources or not. This study is to analyze the chemical componant by the mineralogy, produce the quantity of the standard mine and analyze the mine causing alkali reaction by the rotary analysis of X-Ray and also this is to analyze the usefull possibility of the material for the aggregate of concrete after understands the degree of noxiousness and innoxiousness, measures the quantity of fusible silica and alkali reduced by the chemical method. The result appears that only the Japanese aggregate appears noxiousness, and got that the aggregate of the mine contains noxiousness in Mineral Muscovite, Anthracite, Quartzite, Lend, Silver, Tungsten, Iron, etc.

EDIF 네트리스트를 이용한 부울식 생성에 관한 연구

최영규,조남경 충주대 산업과학기술연구소 1996 産業科學論文集 Vol.4 No.-

To Implement the PLD by using EDIF netlist, which have been generally used in most CAD tools, Joined Information Extraction Algorithm which can extract Joined Information from the Joined information of the netlists and Boolean Equation Generator Algorithm is developed. In this paper the two - level boolean equation generated by using Joined Infoemation Extraction algorithm, Boolean Equation Generation algorithm is implemented by the MYPLD tools. In addition it is verifed that the result of comparing the JEDEC file of the PLD with the PALSAM tool is equivalent.

돈사폐수의 영양염류 제거를 위한 기질특성 연구

조용진,이호식 충주대 산업과학기술연구소 1996 産業科學論文集 Vol.4 No.-

This study was performed to investigate of substrate characteristic of COD for piggery wastewater of nutrient(nitrogen and phosphorus) removal. The influent COD of the piggery wastewater is divided into readily biodegradable COD(Ss) , slowly biodegradable COD (Xs), inert soluble COD(SI) and inert suspended COD(XI). Percents of each form were resulted as 36.6%, 29.7%, 7.7%, and 27%, respectively. The ammonia nitrogen was utilized via stripping, nitrification, autotrophic cell synthesis, heterotrophic cell synthesis, and aerobic denitrification. The removal percents by each step were resulted as 12.9%, 43.1%, 15%, 3.2% and 25.7%, respectively.

객체지향 기법을 이용한 멀티미디어 데이터 모델링

李相文,黃潤哲 충주대 산업과학기술연구소 1996 産業科學論文集 Vol.4 No.-

In this paper a conceptional model for handling multimedia data like text, image, audio, graphics is presented. After introducing the characteristics of multimedia data for using object - oriented technique in modeling of multimedia data, the necessary conditions for the modeling are derived. Finally an object- oriented multimedia data model which satisfies the condition is proposed.

방향성 결합기의 spice를 이용한 해석

柳然國 충주대 산업과학기술연구소 1996 産業科學論文集 Vol.4 No.-

The spice, circuit analysis program has been widely accepted as an industry standard for electronic circuit analysis, and it is used at colleges and universities. This paper describes the analysis of two model of directional coupler that can be used to obtain node voltages proportional to incident, refected and transmittied signals. These models are based on a previously developed multiple coupled node transmision line spice model. From computed node voltages, S-parameter are computed using the pspice post processor, probe, as an example for a filter consisting of transmission line sections. The result of this example are good and microwave analysis can be conducted with pspice, which can be a costeffective and readily useful analysis tool for educators and practicing engineers.

광 주파수 로킹을 위한 주파수 차이 검출기 연구

柳康熙 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1

This paper presents frequency difference detector method which can be used in frequency locking the wavelength of a local VCO laser diode to the reference wavelength fed from OFDM network. The basic structure of the proposed frequency difference detector is based on the master-slave configuration. The optical signals from the reference master laser source and local slave VCO laser are heterodyned on a photo detector, resulting in the microwave output signal corresponding to the difference frequency between two input optical signals. The output electrical difference signal is then compared to the microwave reference frequency through the mixer and OP amplifier as a frequency difference detector. The final difference signal output is filtered and integrated by the integrating loop filter for the frequency locking, and it is delivered to the current source of local VCO laser diode causing its output wavelength change corresponding to the input difference signal. Through experiments with the calculated parameters, we confirmed that the frequency difference detector simply develops an error component that is proportional to the frequency difference between heterodyned optical signals and a reference 1.5GHz microwave oscillator. The achieved locking range of the VCO laser diode is around ± 200 MHz.

열자격 전류 어퀘지션을 위한 회로 구성에 관한 연구

李聖一 충주대 산업과학기술연구소 1995 産業科學論文集 Vol.3 No.-

In the paper, the properties of Thermally Stimulated Current in Measured automatic Data Acquisition System with a A/D Converter set. The A/D Converter set in configured with DIO 8255(Intel), AMD 9513 Timer/Counter and some Programed Controllers. Especially, the numerical method of asymptotic estimation to separate single relaxation curve and physical factors related to charged particles were obtained rapidly and completely. As a result, the data obtained by automatic Acquisition System need tn be corrected to average value and the whole control and inspectation system is needed.

유한차분시간영역(FDTD)법을 이용한 선형배열 안테나에 관한 연구

朴東熙 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1

This paper studies on the characteristics of radiation and input currents and voltages of the linear array antennas by using the finite difference time domain method(FDTD). The linear array antennas are applied by a commercial antennas because it can change of the arbitrary radiation characteristics. In this paper, analyzed the linear array antennas are made up the reflector of the length of 0.5λ and the dipole antennas with the length of 0.49λ, 0.48λ and 0.46λ. Also, by used frequency is selected compatibly 2.0[GHz] in recent mobile communication. The results of analyzed radiation characteristcs can be have the most sutible results in 0.48λ, in comparison with W. L. Stutzman's analytical results, it is quite good agreement, and the validity of present method is confirmed.

고유벡터를 이용한 다 요소 의사결정에 관한 연구

鄭順錫 충주대 2003 産業科學論文集 Vol.11 No.-

Decision analysis has becomes an important technique for decision making in the face of uncertainty. It is characterized by enumerating all the available courses of action, identifying the payoffs for all possible outcomes, and quantifying the subjective probabilities for the all possible random events. When the data are available, decision analysis becomes a powerful tool for determining an optimal couse of action. We study the multi-attribute decision making in a compensatory models. In this paper, we use the eigenvector methods in weights calculating. For the purpose of making optimal decision, the data of five different car models are used. For computing, we used Visual Numerica Version 1.0 software package.