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GMDP 신경망 알고리즘과 PID 제어기를 이용한 효율적인 PLANT 제어에 관한 연구
장진청,설재훈,장종승,추연규,임영도 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
Adapative control theory or parameter tuning of PID controller is mainly limited in linear systems. But in this paper, using a nonlinear mapping capability of NNS, we derive a realtime tuning method of PID controller based on a Back-Propagation method of single GMDP NN. A variety of neural models, especially higher-order networks, are known to computationlly powerful for complex application. While they have advantages over traditional multilayered perceptrons, the uniformity in their network structures, learning algorithms and loop time creates practical problems. Thus this paper evaluates the capability between MLP and GMDP for performing velocity control. Backpropagation is applied to the GMDP as learning rule.
Title Extraction from Book Cover Images Using Histogram of Oriented Gradients and Color Information
Do, Yen,Kim, Soo Hyung,Na, In Seop The Korea Contents Association 2012 International Journal of Contents Vol.8 No.4
In this paper, we present a technique to extract the title areas from book cover images. A typical book cover image may contain text, pictures, diagrams as well as complex and irregular background. In addition, the high variability of character features such as thickness, font, position, background and tilt of the text also makes the text extraction task more complicated. Therefore, we propose a two steps efficient method that uses Histogram of Oriented Gradients and color information to find the title areas. Firstly, text localization is carried out to find the title candidates. Finally, refinement process is performed to find the sufficient components of title areas. To obtain the best result, we also use other constraints about the size, ratio between the length and width of the title. We achieve encouraging results of extracted title regions from book cover images which prove the advantages and efficiency of the proposed method.
Do, Yen Ngoc,Nguyen, Tri Minh,Tran, Nam Tuan Korean Mathematical Society 2020 대한수학회지 Vol.57 No.5
We prove some results about the finiteness of co-associated primes of generalized local homology modules inspired by a conjecture of Grothendieck and a question of Huneke. We also show some equivalent properties of minimax local homology modules. By duality, we get some properties of Herzog's generalized local cohomology modules.
Jin, Yen,Kim, Young-Gu,Kim, Jong-Ho,Kim, Do-Kyung The Korean Ceramic Society 2005 한국세라믹학회지 Vol.42 No.7
Deposition of TiN$_{x}$ film was conducted with a DC sputtering technique. The effect of the processing parameters such as substrate temperature, deposition time, working pressure, bias power, and volumetric flowing rate ratio of Ar to N$_{2}$ gas on the resistivity of TiN$_{x}$ film was systematically investigated. Three kinds of substrates, soda-lime glass, (100) Si wafer, and 111m thermally grown (111) SiO$_{2}$ wafer were used to explore the effect of substrate. The phase of TiN$_{x}$ film was analyzed by XRD peak pattern and deposition rate was determined by measuring the thickness of TiNx film through SEM cross-sectional view. Resistance was obtained by 4 point probe method as a function of processing parameters and types of substrates. Finally, optimum condition for synthesizing TiN$_{x}$ film having lowest resistivity was discussed.
Kim, Do Kyun,Lee, Yeon Sub,Nguyen, Hoang Yen Thi,Acharyya, Rakhi,Loloee, Reza,Shin, Kyung-Ho,Kim, Young Keun,Min, Byoung-Chul,Pratt, W. P.,Bass, Jack IEEE 2010 IEEE transactions on magnetics Vol.46 No.6
<P> Using current-perpendicular-to-plane (CPP) magnetoresistance measurements, we derive values of twice the enhanced interface resistance, <TEX>$2AR_{\rm F/N}^{\ast}$</TEX>, and the interface scattering asymmetry, <TEX>$\gamma_{\rm F/N}$</TEX>, for the ferromagnetic/non-magnetic (F/N) pairs Ni/Ru and <TEX>${\rm Co}_{90}{\rm Fe}_{10}/{\rm Cu}$</TEX>. For Ni/Ru, we find <TEX>$2AR_{\rm Ni/Ru}^{\ast}=1.7_{-0.3}^{+0.4}\ {\rm f}\Omega{\rm m}^{2}$</TEX>, similar to the value for Fe/Cr, but we estimate <TEX>$\vert\gamma_{\rm Ni/Ru}\vert=0.15\pm 0.03$</TEX>, much smaller than the value for Fe/Cr or the asymmetry found for Ni(Ru) alloys. For <TEX>${\rm Co}_{90}{\rm Fe}_{10}$</TEX> we find <TEX>$2AR_{\rm CoFe/Cu}^{\ast}=1.1\pm 0.2$</TEX> and <TEX>$\gamma_{\rm CoFe/Cu}=0.8\pm 0.1$</TEX> , both similar to the values for Co/Cu. </P>
Factors Affecting Parents' Intention to Choose English Centers: The Role of STEM Education
Tran, Do-Van-Anh,Nguyen, Ngoc-Duyen,Tang, Thai-Ngoc,Le, Dinh-Bao-Nhi,Vo, Huyen-Yen-Nhi,Le, Hoanh-Su Korea Multimedia Society 2020 The journal of multimedia information system Vol.7 No.1
Parents' desire for daily English practice for students and the urge for a etter English education has led to a demand for a highly qualified educational curriculum. In addition to getting deep-dive insights into parents' decision-making process, the increasingly important role of STEM education method has been proved in accordance with plenty of evidenced-based many of previous research. This study was conducted to examine the five independent factors affecting parents' intentions when designating English centers for their children, respectively named: Facility, Teachers, Brands, Social factors and Tuition. Through a preliminary approach, 235 samples were analyzed. Analysis of the sample responses reveals the importance level of five independent factors affecting Parents' intention to choose English centers in descending order: Facilities, Teachers, Brands, Tuition and Social factors. Furthermore, a positive correlation was found between STEM and Intention to choose English centers, indicating that whether the center applies STEM-related curriculum in English courses or not, in fact, has a significant impact on parents' decision. In terms of attitude towards STEM, further statistical tests revealed an interesting finding, which is the fact that how STEM affects Intention of parents is directly proportional to the Attitude towards STEM. With the help of SPSS 20 and AMOS 20, the SEM analysis was processed in order to draw conclusions about factors impacting Intentions to choose English centers. Combining with Multi-group analysis, the major role of STEM education has been assessed in relation to plenty of correlations. In light of recent major and massive growth of English teaching market in Vietnam, several suggestions and recommendations in terms of sustainable developments have been displayed in this research.