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      • 韓國 河川의 流出에 關한 硏究 : 洛東江流域을 中心으로

        金熙鍾 東亞大學校 1971 東亞論叢 Vol.8 No.3

        Through this study, mathematical models were sought that would more accurately represent the correlationship between rainfall and run-off phenomena characteristic & in rivers in Korea, preceded by an extensive analysis of the existing rainfall and run-off records. The conclusion may be summarized as follows: 1. The period of wolf's number is 11 years. The period of the annual rainfall variations is 10 to 11years in Seoul and Pusan areas, and 12 years in Taegu area. The period of the annul maximum flood variations coindides with that of wolf's number; that is 11 years. 2. Annual run-off coefficient may be obtained by the equation: f=13.10F?? where f=annual run-off coefficient F=Horton's coefficient 3. The maximum daily precipitation within the catchment areas of the Naktong river may be estimated by the following equations: (1) Elevations between 0 and 84 meters; (A) Central area; y=0.74x+192.0 where y=maximum daily precipitation(mm) x=elevation(m) (B) Southern Area; y=1.32x+109.6 (2) Elevations between 85 and 180 m; y=0.837x+106.6 (3) Elevations above 180m; y=0.26x+131.3 4. the maximum annual precipitation within the catchment areas of the Naktong river may be estimated by the following equations: (1) Northen area: (A) Elevations between 0 and 80 meters; y=5.094x+735.6 where y=estimated annual precipitation(mm) x=elevation(m) (B) Elevations between 80 and 195 meters; y=1.097x+832.1 (C) Elevations above 195meters; y=2142-4.56x (2) South-east area: (A) Latitudes between 35。0' and 35。46'; y=1359.5-8.12x where x=the latitude minus 35。0' (B) Latitudes between 35。46' and 35。58'; y=7.53x+575.1 (3) South-west area: y=66954.76/x+23.03 5. More than two thoids of the annual precipitation is distributed among the months of June, July, August and September. 6. Rainfall intensity-duration relations applicable to some of the important points for a duration less than 120 minutes, are as follows: (A) Seoul area;(the han river) I??=467.7/(t+6)?? (Frequency interval of two years) I??=3681.3/(t+39)?? I??=1110/(t+5)?? I??=755.1/(t+4)?? I??=1633/(t+7)?? (B) Pusan area; (the Naktong river) I??=198.38/t?? I??=399.67/t?? I??=307.41/t?? I??=439.15/t?? (C) Taegu area(the Naktong river) I??=239.85/t?? I??=488.98/t?? I??=350.24/t?? I??=557.09/t?? 7. Rainfall intensity-duration relations applicable to some of the important points, for along duration, are as follows: 8. The hyetograph applicable to Seoul area may be represented by the following formula. I tb??=a[r??{(tb??+rb)??-(tb??+rb)??}+br?? 1/(tb??+rb)??-1/tb??+rb)??] 9. Precipitation is found to in approximately normal distribution. 10. The initial loses due to evaportranspiration and filtration, in the tributaries of the Naktong river may be estimated by the following relation: where r??b: initial losses(mm) q?? : discharge per unit catchment area, immediately prior to rainfall,(㎥/sec/㎢) 11. Recession coeffiecients applicable to Woekwan area of the Naktong river basin may be estimated by the equation; K=0.0018?? where K=recession coefficient Q??=discharge at the inflection point on the recession curve, ㎡/sec 12. The maximum floods for the tribularies of the Naktong river may be Jo-mulated as follows: (1) when q<0.01; Q=0.125 R??A (2) when 0.01<q??<1.0; Q=0.2833q??R??.A where Q=maximum flood flow, ㎥/sec q??=discharge per unit catchment area, immediately prior to rainfall, ㎥/sec/㎢ A=catchment area, ㎢ R??=rainfall intensity correspending to the concentration time, mm/hr

      • 糞尿處理 및 處分에 관한 硏究 : 韓國의 小都市를 中心으로

        金熙鍾 東亞大學校 1976 東亞論叢 Vol.13 No.1

        Studies Were made on the Characteristics and the digestion rate of night Soil in a pilot plant study using a digestion tank Results are as the followings: 1. The characteristics of night Soil Water content 94.0% Specific gravity 7.4% total residue 6.0% residue of ignition 1.2% loss of ignition 4.8% (total) Nitrogen 0.4% 2. BoD of original night soil summer(June~August) Max 15,000ppm Min 10,500ppm autumn(September~November) Max 23,300ppm Min 13,100ppm winter(December~February) Max 24,300ppm Min 20,400ppm spring(March~May) Max 20,100ppm Min 16,800ppm 3. The rate of digestion by sea son(in the effluent from a Primary treatment) BoD were ranged 1,600ppm to 3,000ppm 4. The rate of digestion by second treatment BOD were ranged 36 ppm to 90 ppm

      • KCI등재

        그라디언트 부스팅과 균형 분류를 이용한 채무 불이행 예측

        김희종,김형도 한국정보기술학회 2014 한국정보기술학회논문지 Vol. No.

        Gradient boosting, which is a kind of boosting technique, builds a strong prediction model by combining many weak prediction models created step by step with gradients of a loss function. Gradient boosting gives interpretable results, while missing values are managed almost without loss of information, and feature selection is performed as an integral part of the procedure. These properties make gradient boosting a good candidate for loan default prediction. As far as we know, the application of this method to loan default prediction has not been fully documented to date. This paper tries to evaluate it comparatively with other algorithms. Some alternatives for solving the imbalance characteristic of the loan default prediction problem are also analyzed in combination with the method. Gradient boosting shows the best result in AUC and improvements through the combination are also meaningful in G-mean and F-measure. 그라디언트 부스팅 알고리즘은 손실 함수의 경사도를 바탕으로 다수의 약한 예측 모형들을 단계적으로 생성하여 앙상블 방식으로 결합함으로써 강한 예측 모형을 생성하는 부스팅 기법을 사용한다. 해석 가능한 결과를 제시하며, 결손된 값이 있는 경우에도 정보 손실 없이 예측 가능하고, 처리 과정에서 자동적으로 특징 변수가 선택되는 등의 장점을 가지고 있다. 이러한 그라디언트 부스팅 알고리즘을 대출자 또는 대출희망자가 채무를 이행하지 않을 가능성을 예측하는 채무 불이행 예측에 적용하는 연구는 매우 부족한 상황이기에, 이 논문에서는 그 성능을 다른 알고리즘들과 비교 평가하고, 채무 불이행 데이터 집합의 중요한 특성 중 하나인 클래스 불균형 문제에 대한 해결책을 검토하였다. 채무 불이행 예측에서 그라디언트 부스팅은 AUC를 기준으로 가장 우수한 결과를 보여주었으며, 클래스 불균형 문제 해결 기법과 그라디언트 부스팅 알고리즘을 결합하여 G-평균과 F척도에서 의미 있는 개선이 가능하였다.

      • KCI등재
      • KCI등재

        백성욱 박사의 금강경 수행공동체 연구

        김희종 한국민족사상학회 2021 민족사상 Vol.15 No.3

        This paper discusses the achievements of Baek Sung-wook, who took a special step in modern and contemporary Buddhist history in Korea, and also the Diamond Sutra Reciting Community in Sosa Area where to Practice Your Mind, which he taught in his later years. Although his research had partially been introduced previously, this paper focuses on revealing the whole story with multiple data having been recently discovered. Whereas the Seonbuljang of Geumgang Mountain, the first and only Buddhist communities in modern times, Baek Sung-wook taught the public through the teaching of  the Avatamska Sutra, Sosa Area at more mature stage taught the public through the teaching of the Diamond Sutra. The completion of the way to cultivate the Mind through Diamond Sutra is estimated to be around 1962 in aligned with the period when Sosa Community was established. It was intended to examine the characteristics of Diamond Sutra Reciting Community at Sosa Area in terms of Buddha, Dharma(his teachings) and Sangha(the community of monks and lay Buddhists). Particularly interesting difference between the two communities is the fact that the appearance of the practitioners at Sosa is different from that of Mt. Geumgang. This difference can be deduced from Sosa's voluntary atmosphere, unlike Mt. Geumgan's disciplined atmosphere of setting and following the strict rules and guidelines. The practitioners at Sosa were reborn as new Buddhist as they went through fundamental changes for a short period of time. As a result of their finding enlightenment, the practitioners lived their entire lives with admiration and teaching of their teacher in their hearts; thus, Diamond Sutra Reciting Community at Sosa Area where to practice your mind can be as a model for a true Buddhist community, which in turn can be considered very meaningful. 이 논문은 한국 근현대 불교사에서 특별한 행보를 걸은 백성욱 박사의 행적 중에서, 말년에 후학들에게 가르침을 편 소사도량 금강경 수행 공동체에 대해 논구한 글이다. 그동안 이 부분에 대한 연구는 수행자들의 개별적인 수행담으로 소개되었지만, 최근 많은 자료들이 발굴되어 전모를 밝혀보고자 시도해 본다. 백성욱 박사는 근대불교에서 최초이고 유일한 수행공동체인 금강산 선불장에서는 화엄경 가르침을 펼쳤고, 원숙한 경지에 이르렀던 소사도량에서는 금강경 가르침을 통한 바치는 법으로 대중들을 지도하였다. 바치는 법이 완성된 시기는 소사도량이 개설된 1962년 전후로 추정된다. 소사도량 금강경 수행공동체의 특징을 불(佛) 법(法) 승(僧)의 측면에서 살펴보고자 하였다. 특히 우리 곁에 살아있는 부처님의 모습으로 남성 여성 차별 없이 가르침을 주었는데, 규칙과 지침을 세우고 철저히 지키려했던 금강산 선불장과는 달리, 소사도량에서는 정해진 계율 없이 모든 것이 저절로 자발적인 수행 분위기의 영향으로 수행자들의 외모가 금강산에서와는 다르게 제각각인 것이 흥미롭다. 이곳을 거친 수행자들은 짧은 기간 동안 근본적인 변화를 겪어 새 불자로 거듭 태어났기에, 평생을 스승에 대한 흠모와 가르침으로 살게 된 행적은, 진정한 불교수행공동체의 모델로 받아들일 수 있기에 매우 의미가 있는 것 같다.

      • KCI등재
      • 洪水追跡에 對한 硏究

        金熙鍾 東亞大學校 1966 東亞論叢 Vol.3 No.-

        Flood routing is an important technique necessary for the complete solution of a flood-control problem and for the satisfactory operation of a flood-prediction service. This paper described a storage-routing method on flood routing. The storage-routing method is an analytical method in hydrogic methods, techniques for solving the storage equation, using the storage functions in equation(2) storage equation. (I₁+I₂/2)t - (O₁+O₂/2)t=S₂-S₁ (1) Where ??=(I₁+I₂/2)t ??=(O₁+O₂/2)t S₂-S₁=△S Routing equation: ?? (2) ??=O(t+??) Where I: inflow O: outflow f: coefficient of inflow ψ(??): storage function ??: apperance storage for I and ?? ??: time leg t: time

      • 糞尿와 都市廢棄物의 混合處理에 대한 硏究 (Ⅱ)

        金熙鐘,孫晋彦,金燦國,金相烈 동아대학교 환경문제연구소 1978 硏究報告 Vol.2 No.1

        糞尿와 固形廢棄物중의 燃炭재를 混合合成 하여 肥料化 함에 알맞는 消化條件을 糞尿溶液의 物性(稀釋配率 및 返送汚泥의 配合比率), 燃炭재의 特性(粒子의 크기 및 配合比率), 空氣流量 및 消化時間등의 變化에 따라 硏究하였으며 이 들 사이의 相關關係를 檢討하여 다음과 같은 結果를 얻었다. 1. 稀釋律이 클수록 消化速度는 크며 最適의 稀釋律은 10배이다. 2. 消化時間은 24∼36時間 사이에서 가장 消化速度가 크며 12시간 까지는 거의 소화되지 않는다. 3. 空氣流量이 0.1∼0.02 (vol-ratio/sec) (air/sample)의 범위에서는 流量이 적을수록 소화속도가 증가한다. 燃炭재가 混合 되었을 때와 그렇지 않을 경우의 最適流速은 각각 0.025 및 0.018 (vol-ratio/sec) (air/sample)이다. 4. 燃炭재의 粒子의 크기는 클수록 消化 效果가 크며 最適의 粒子의 크기는 5∼10mesh이다. In the composting with the nightsoil and anthracite bully ash for he usable disposal of urban wastes in the city of Busan, the study on the appropriative condition to the digestion according to the ratio of dilution of nightsoil, the compounding ratio of the treated nightsoil and the ash, the particle size of solid waste the flowrate of air and the time of reaction has obtained as the following results. ⅰ) Rate of digestion seems to increase in proportion to the dilution as the optimum ratio of diluton is 10 rimes. ⅱ) Digestion has not been to carried till 12 hrs., but the velocity of reaction is maximum at the 24∼36hrs. ⅲ) In the range of 0.1∼0.02 (vol-ratio/sec). (air/sample), the flowrate of air is in inverse proportion to the rate of digeston. In the case of mixing with anthracite ash the optimum is 0. 025 but wit without case is 0.018 (vol. ratio/sec) (air/sample). ⅳ) The particle size of the ash is accelated to the velocity of digestion such as available size. is 5∼10 mesh.

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