군집 별 표준곡선 매개변수를 이용한 치밀오일 생산성 예측 순환신경망 모델

한동권(Dong-kwon Han),김민수(Min-soo Kim),권순일(Sun-il Kwon) 한국정보통신학회 2021 한국정보통신학회 종합학술대회 논문집 Vol.25 No.2

치밀오일 미래 생산성 예측은 잔류오일 회수량 및 저류층 거동 분석을 위해 중요한 작업이다. 일반적으로 석유공학적 관점에서 감퇴곡선법을 이용하여 생산성 예측이 이루어지는데, 최근에는 데이터기반의 머신러닝 기법을 이용한 연구도 수행되고 있다. 본 연구에서는 딥러닝 기반 순환신경망과 LSTM, GRU 알고리즘을 이용하여 미래 생산량 예측을 위한 효과적인 모델을 제안하고자 한다. 입력변수로는 치밀오일 생산 시 산출되는 오일, 가스, 물과 이와 더불어 다양한 군집분석을 통해 산출된 표준곡선이 주요 매개변수이고, 출력변수는 월별 오일 생산량이다. 기존의 경험적 모델인 감퇴곡선법과 순환신경망 모델들을 비교하였으며, 모델의 예측성능을 향상시키기 위해 하이퍼파라미터 튜닝을 통해 최적 모델을 도출하였다. Predicting future productivity of tight oil is an important task for analyzing residual oil recovery and reservoir behavior. In general, productivity prediction is made using the decline curve analysis(DCA). In this study, we intend to propose an effective model for predicting future production using deep learning-based recurrent neural networks(RNN). LSTM, and GRU algorithms. As input variables, the main parameters are oil, gas, water, which are calculated during the production of tight oil, and the type curve calculated through various cluster analyzes. the output variable is the monthly oil production. Existing empirical models, the DCA and RNN models, were compared, and an optimal model was derived through hyperparameter tuning to improve the predictive performance of the model.

主觀的인 評價에 의한 靑少年의 肥滿傾向 分析

權善鈺,金基學,李東洙,鄭鎭國 慶北大學校 師範大學 體育學硏究會 1992 體育學會誌 Vol.20 No.-

This study was conducted to analyze the tendency of obesity by subjective evaluation method in measuring the skinfold thickness in adolescents. The validity norms were height, weight, the sum of skinfold thickness, Db1, %Fat1, %Fat2, and BMI. The subjects surveyed were 2,442 boy and girl students of middle and high school in medium and small city and big city. The results are summarized as follows; 1. Weight of adolescents evaluated as obesity was over 76㎏ in boy's middle, over 67㎏ in gril's middle school, over 79㎏ in boy's high school, and over 68㎏ in girl's high school, the sum of skinfold thickness was over 40㎜, over 39㎜, over 54㎜, and over 41㎜ respectively. 2. Except the case of height in girl's middle, boy's high and girl's high school, in height in boy's middle, weight, the skinfold thickness, Db1, %Fat1, %Fat2, and BMI, difference among the degree of obesity evaluated subjectively was significant(p<.05). 3. Except heigh in girl's middle, boy's and girl's high school, correlation between the degree of obesity evaluated subjectively and height in girl's middle school, weight, the sum of skinfold thickness, Db1, %Fat1, %Fat2, BMI respectively was high and significant(p<.01 or p<.001) Therefore, on the basis of above results, I think we can evaluate the tendency of obesity in adolescents validly by subjective evaluation method as well.

만성부비동염 환자에서 부비동 단순 X-선 사진과 전산화 단층(CT) 사진 소견의 비교

선동일,윤선호,신민호,서병도,양일권 釜算慶南耳鼻咽喉科學會 1993 임상이비인후과 Vol.4 No.1

두 가지 CET-EDTTTF 동질이상 화합물의 구조 비교

권선영,노동윤 서울여자대학교 자연과학연구소 2005 자연과학연구논문집 Vol.17 No.-

CET-EDTTTF was synthesized and crystallized (CH_(2)Cl_(2)/CH_(3)CH_(2)OH) in monoclinic system with P2(1) space group and the cell parameters: a = 5.0570(15)Å, b = 20.702(5)Å, c = 14.759(3)Å, beta = 90.30(2)°. CET-EDTTTF molecules arranged in bc-plane are stacking along the a-axis. There is no intermolecular S···S interaction shorter than the sum of the van der Waals radii of sulfur atom(3.70Å). When CET-EDTTTF was reacted with AgCF_(3)SO_(3), black single crystals of (CET-EDTTTF)·(solv) were obtained after crystallization. It crystallized in triclinic system with P-1 space group and the cell parameters: a = 6.5962(14)Å, b = 9.123(2)Å, c = 15.545(3)Å, alpha = 77.491(3)°, beta = 87.646(3)°, gamma = 69.332(3)°. CET-EDTTTF molecules form dimers with head-to-tail fashion, which are stacking along b-axis. The molecular sheets formed in ab-plane are separated by the solvated molecules. The CET-EDTTTF molecules in this sheet are connected by the intermolecular S···S interactions shorter than 3.70Å.

Agronomic Characters and Their Correlation Coefficient on Black Seeded Soybeans Collected in Chonnam Province

Kwon,Byung-Sun,Choi,Seong-kyu,Shin,Jeong-Sik,Shin,Dong-Youn,Kyu Hwan 한국자원식물학회 2002 Plant Resources Vol.5 No.2

In order to obtain the genetic information on the quantitative characters of black seeded soybeans, which would be needed to improve selection efficiency for breeding high yielding genotype, 45 varieties of black seeded soybeans collected in Chonnam, Korea were grown and variations of several important characters were observed. Heritability of each observed character, phenotypic and genotypic correlations among the characters and contribution of each yield component on grain yield through path coefficient analysis were estimated. Both number of pods per plant and 100-seed weight showed not only high heritability but also highly significant phenotypic and genotypic correlation with seed yield, and hence it was desirable to select plants with more number of pods per plant and higher 100-seed weight than raise seed yield of black seeded soybeans collected in Chonnam. In addition, number of pods per and 100-seed weight were proved to be the most influential variables on the viability of seed yield by path coefficient analysis. Since these showed the high heritability of number of pods per plant, selection of plants with higher 100-seed weight would be more efficient for breeding high yielding genotype.

Effect of Fertilizer Levels on Growth Characters, Dry Matter Yield and Nutrient Quality of Forage Rape in Spring Sowing

Kwon,Byung-Sun,Shin,Jeong-Sik,Shin,Dong-Young,Hyun,Kyu-Hwan,Park,Hee-Jin,Sin,Jong-Sup,Seong-Kyu 한국자원식물학회 2003 Plant Resources Vol.6 No.2

To find out the optimum fertilizer level for high yielding variety, Velox, experiment was conducted with 15 compositions of fertilizer levels at the experiment field of forage crop in Sunchon National University from Mar. 2000 to Aug. 2000. The effects of nitrogen fertilizer on plant growth were significant but increasing rate of application in potassium and phosphate fertilizers above 6 kg/a had negligible effects on plant growth. The optimum nitrogen application level of fertilizers turned out to be 16-6-6 kg/l0a of N-P2O5-K5O. Content of crude protein was highest and that of crude fiber such as NDF, ADF, cellulose and lignin were lowest at this rate of fertilizer application. Furthermore, IVDMD was high and dry matter yield were highest at the optimum raterate

瀉靑丸과 그 構成藥物群의 항산화 효과

權寧模,朴宣東 대한본초학회 2002 大韓本草學會誌 Vol.17 No.2

Objectives : Exposure to oxidant molecules can generate reactive oxigen species(ROS; for example, H2O2, O2-, OH · ). These free radicals can alter DNA, proteins and membrane phospholipids. ROS are responsible for many diseases including cancer, neurodegerative diseases and cardiovascular diseases. Thus, to prevent against celluar damages associated with oxidative stress, antioxidants is important and many research about natioxidants are being conducted over the world. Methods : This study was performed to research the antioxidant activities of Sachunghwan(瀉靑丸) and its component groups in vitro. The experimental group was divided into 4 groups: Sachunghwan(SC), Samultang group(SC-1), Chungyul group(SC-2) and Haepyo group(SC-3). Results: 1. All experimental groups had significant antioxidant activity in linoleic acid system on concentration in comparison with control group. 2. In DPPH radical scavenging experiment and inhibitory effect experiment on superoxide generation in xanthine-xanthine oxidase system showed that all experimental groups had a dose-dependent effect. SC and SC-2 have more effect than SC-1 and SC-3. 3. Inhibitory effect experiment on superoxide generation induced by xanthine-xanthine oxidase system showed that all experimental groups had a dose-dependent effect. SC and SC-2 have more effect than SC-1 and SC-3. 4. In the inhibitory effect experiment on lipid peroxidation reaction in H2O2-Fe2+system showed that all experimental groups had a dose-dependent effect. SC-1 and SC-3 have more effect than SC and SC-2. 5. In the experiment on Nitrate scavenging activity showed that all experimental groups had a dose-dependent effect. SC and SC-2 have more effect than SC-1 and SC-3. Conclusion: Sachunghwan(SC) has an antioxidant activity and its antioxidant activity is likely to be associated with Chungyul group(SC-2).

TINA 기반의 인터넷 멀티미디어 서비스 구조 설계

권태형,이상백,박동선,이경휴 한국정보전략학회 1999 추계공동학술대회 논문집 Vol.- No.01

본 논문에서는 TINA 기반의 인터넷 멀티미디어 서비스 구조를 설계하였다. 설계한 구조는 PSTN을 사용하여 인터넷에서 멀티미디어 서비스를 위한 Qos를 보장할 수 있도록 하였다. 본 논문에서 제시한 구조에서는 TINA 비즈니스 모델을 이용하여 사용자는 손쉽게 다양한 멀티미디어 서비스를 이용할 수 있도록 하고, 서비스 제공자는 서비스 제공이 손쉬우며 망 사업자 측면에서는 서비스 활성화에 따른 망 사용 증가로 인해 망 수요를 증가 시킬 수 있도록 하였다.

Yield of Rice Affected by Meteorological Elements in Yeosu Area of Korea

Kwon,Byung-Sun,Choi,Seong-Kyu,Shin,Jeong-Sik,Shin,Jong-Sup,Shin,Dong-Young,Hyun,Kyu-Hwan,Kuk,Yong-In,Park,Hee-Jin 한국자원식물학회 2003 Plant Resources Vol.6 No.2

This study was conducted to investigate the relationships between yearly variations of meteorological elements and yearly variations of productivity in rice. In addition, correlation coefficients among yield and yield components were used to find out the relationships between meteorological elements and productivity. Yearly variation of the mean air temperature in May was large with coefficients of variation(C.V.) of 25.0%, but the variation of the duration of sunshine in May were relative small. No. of panicles per hill and 1,000 grains wt. of brown rice were great with C.V. of 21.1, 19.7%, respectively, brown rice yield show more or less C.V. of 5.5% and milled rice show still less variation. Correlation coefficients between temperatures in period of cultivation from May and yield were positive correlations. Correlation Coefficients between precipitation in period of cultivation from Sep. to Oct. and yield are positive correlations. Correlation coefficients amount the panicle length, no. of panicles, no. of spikelets, ratio of ripened grains, 1,000 grains wt. of brown rice, milled rice yield, brown rice yield and milled rice yield were positively significant at the level of 1 %, respectively.

남부지역에서의 양파 수확, 저장 및 유통실태

권병선,이을태,오용비,정동희,이조진 順天大學校 師範大學 附屬 科學敎育硏究所 1996 科學과 敎育 Vol.4 No.-

This study was carried out to find marketing, storage and harvest of onion in southern parts of Korea from Jan. 1994 to Apr. 1994. Early maturing cultivar harvest between 10th and 20th of May but late maturing cultivar harvest between 10th and 20th of June, this period was busy farming season with a shortage of labor. Early maturing cultivar was send out good directly but late maturing cultivar was send out good after shortage the simple store house with the period 7-9 month, and professional seed production farmer are not in here. We hope that this report stimulates research to investigate for the establishment of not only harvesting practices such as varietal improvement, machanical harvesting and disease resistant variety for the storage.