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Potentiometric Neutralization Titration of Acid-Base in Anhydrous Ethylenediamine
김준용,Kim Joon Yong Korean Chemical Society 1976 대한화학회지 Vol.20 No.3
비수용액 에틸렌디아민 중에서 산-알칼리의 전위차 중화 적정 이론을 고찰하여 실험한 결과 이론과 잘 일치하였다. Equilibria equations, applicable to solvent of low dieletric constant, were derived for potentiometric neutralization titration. Effects of salt and solvent were studied in potentiometric neutralization titration using ethylenediamine as solvent. Good agreement was observed between theory and experimental results.
김준용,Kim, Joon-Yong Korean Chemical Society 1970 대한화학회지 Vol.14 No.1
非水溶液 Ethylenediamine 中에서 水銀電極의 標準電位 및 水銀鹽化物, $HgCl_2,\;HgBr_2,\;HgI_2$의 Ion-Pair 形成恒數를, Hg電極/$HgX_2$ 또는 $HgX_2$+NaX//亞鉛아마르감 參照電極과 같은 Cell의 構成으로서 電位差法에 依하여 測定하였다.
Studies on Methanol Fuel Cells
김준용,Kim, Joon-Yong Korean Chemical Society 1970 대한화학회지 Vol.14 No.1
Methanol 燃料電池는 安價인 液體燃料의 使用, 低溫에서의 可動, 特히 電氣化學的 反應性 等에서 볼 때, 可搬型動力電源으로 有望한 燃料電池系라고 본다. 本 論文은 再現性이 크고, 低過電壓인 同時에 높은 電流密度에서 動作할 수 있는 多孔性인 活性化 電極의 製作 및 燃料電極의 分極特性을 檢討하였다.
Activity Coefficients of Uni-univalent Electrolytes in Anhydrous Ethylenediamine
김준용,Joon Yong Kim Korean Chemical Society 1973 대한화학회지 Vol.17 No.4
非水溶液 에틸렌디아민中에서, K-Hg,KI($C_1$) II ($C_2$)KI, Hg-K의 農談電位를 構成하여, 電位差法으로 電位差를 測定하여, Debye-Huckel型의 活性係數式으로 計算한 理論値와 比較한 결과 Marshall-Grunwald 식이 잘 適用되었다. The dependence of ionic activity and electrode potential upon electrolyte concentration in ethylenediamine includes the effects of ion-pair formation involving all possible combinations of cations and anions represent in the solution and includes the ion-atmosphere effects of dissociated ions. For calculating activity coefficients, Debye-Huckel limiting law, extended Debye-Huckel,equation, and Marshall Grunwald equation were used in comparison of experimental and calculated plots of the electromotive force of the cell versus the logarithum of concentration. The fit of the experimental points to the theoretical curves was improved in case of the Marshall-Grunwald equation.
RNN모델에서 하이퍼파라미터 변화에 따른 정확도와 손실 성능 분석
김준용,박구락,Kim, Joon-Yong,Park, Koo-Rack 중소기업융합학회 2021 융합정보논문지 Vol.11 No.7
본 논문은 감성 분석에 사용되는 RNN 모델의 최적화를 얻기 위한 성능분석을 위하여 하이퍼파라미터 튜닝에 따른 손실과 정확도의 추이를 관찰하여 모델과의 상관관계를 연구하였다. 연구 방법으로는 시퀀셜데이터를 처리하는데 가장 최적화된 LSTM과 Embedding layer로 히든레이어를 구성한 후, LSTM의 Unit과 Batch Size, Embedding Size를 튜닝하여 각각의 모델에 대한 손실과 정확도를 측정하였다. 측정 결과, 손실은 41.9%, 정확도는 11.4%의 차이를 나타내었고, 최적화 모델의 변화추이는 지속적으로 안정적인 그래프를 보여 하이퍼파라미터의 튜닝이 모델에 지대한 영향을 미침을 확인하였다. 또한 3가지 하이퍼파라미터 중 Embedding Size의 결정이 모델에 가장 큰 영향을 미침을 확인하였다. 향후 이 연구를 지속적으로 이어나가 모델이 최적의 하이퍼파라미터를 직접 찾아낼 수 있는 알고리즘에 대한 연구를 지속적으로 이어나갈 것이다. In this paper, in order to obtain the optimization of the RNN model used for sentiment analysis, the correlation of each model was studied by observing the trend of loss and accuracy according to hyperparameter tuning. As a research method, after configuring the hidden layer with LSTM and the embedding layer that are most optimized to process sequential data, the loss and accuracy of each model were measured by tuning the unit, batch-size, and embedding size of the LSTM. As a result of the measurement, the loss was 41.9% and the accuracy was 11.4%, and the trend of the optimization model showed a consistently stable graph, confirming that the tuning of the hyperparameter had a profound effect on the model. In addition, it was confirmed that the decision of the embedding size among the three hyperparameters had the greatest influence on the model. In the future, this research will be continued, and research on an algorithm that allows the model to directly find the optimal hyperparameter will continue.
논문 : 생물생산시설 및 환경공학 ; 식물공장내 작물의 간격조절방법에 대한 식재면적지표 시뮬레이션
김준용 ( Joon Yong Kim ),양승환 ( Seung Hwan Yang ),이춘구 ( Chun Gu Lee ),( Alireza A. Ashtiani ),이중용 ( Joong Yong Rhee ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.5
Various crop spacing methods have been implemented so far for the greenhouse and plant factory applications. However, there is no generally accepted parameter for evaluation of plant spacing efficiency in plant production system. In this study, ``Planted Area Index`` (PAI) of a spacing method is defined as the ratio of the planted area in the field to required planted area using the spacing method when no transplanting operation is assumed. Three common types of spacing methods for plane placement of the plants were modeled mathematically. For calculating the planted area, an optimal growth radius function (R(t)) is needed. Function of the days after transplanting stage gives a radius of an optimal circle area for the living plants. A computer simulation was developed to calculate the PAI, based on three crop spacing methods and four optimal growth radius functions. In general, the 1-D zigzag spacing showed the best PAI. Moreover, it gives an example on how to apply the PAI for the design.