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김충래,이광영 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
This aims of this study are excavate the environmentally friendly design theories related with the urban village and architecture planning. For this purpose, Normative theory study which means logical analysis of environmentally friendly theories in the new field of environmentally friendly urban village and architectural design, is done in accordance with the object of this study. Site of case study is Haejeo village in Bong-hwa with Wae-am village in Asan. As the result : ① Four-Environmentally friendly urban village planning elements related with the purpose of this study, are clarified : these are social planning, economic planning, education·cultural planning, environmental planning ② Urban village design indicators purposed by means of the normative theory study analysis and contents analysis reated with environmentally friendly urban village and architecture planning which contain environmentally friendly planning elements, and case study.
활성슬러지 하수처리장의 평가 및 효율적인 운영을 위한 조정방안의 제안
김충래,신진명,고광백 충북대학교 건설기술연구소 1990 建設技術論文集 Vol.8 No.2
One rational formula depicting the relationship between sludge ages and recycle flow rates has been applied to an existing activated sludge wastewater treatment plant in order to delineate' sludge wasting volume at a particular sludge age. The relationship was formulated on the basis of mass balanoes of total suspended solids content in a conventional activated sludge system at steady state conditions. A sensitivity analysis was conducted with set of input variables obtained from the existing wastewater treatment plant to delineate the most important variable in determining wasting sludge flow rates. The results showed that the sludge age was the most important variable in determining sludge wasting volumes when the activated sludge system was controlled by wasting part of recycle sludges. Recycle ratio was also another important variable in determining sludge wasting volumes to maintain a particular sludge age. On the other hand, hydraulic retention time and final clarifier sludge capturing capacity were relatively less important variables than sludge age and recycle ratio.
광가입자망에서 WDM 하이브리드 광절체 시스켐에 관한 연구
엄진섭,김충래 江原大學校 産業技術硏究所 1995 産業技術硏究 Vol.15 No.-
By integrating WDM to OPS unit which plays an important role for the reliability of CPN, we made it possible to provide CATV, VOD, and high-speed data services simultaneously and to meet the requirements for new services in the future. For the design of optimal system, the link analysis of power budget has been performed. Also, the prototyped system has been tested with STM-1 level signals to confirm functions such as transmission, distribution, and protection. The results proved that when occurred out-of-order or recovery of ONU, the system did the pertinent switching with minimum loss for high-speed data services. Also for video distribution services, the system has distributed STM-1 level signals successfully.
조성렬,김충래,박순달,김학성 ( Sung Yul Jo,Chung Rae Kim,Sun Dal Park,Hag Seong Kim ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.1
Among the many parameters describing water quality, total nitrogen content(T-N) is regarded as important one in relation to water quality management of the waterbodies far its role in eutrophication process. For that matter high accuracy in determining the total nitrogen content is imperative. Furthermore, Korean government put under the regulation the total nitrogen contents of the effluent from the wastewater treatment plants since 1996. Two methods are commonly used to determine the total nitrogen contents. One is based on the oxidation of all the nitrogen in the sample to nitrate with potassium persulfate under alkaline conditions being followed by spectrophotometric measurement with UV light of 220 ㎚ wavelength. The other is based on the separate determinations of the organic nitrogen, ammonia, nitrite, and nitrate being followed by summation to obtain total nitrogen contents. The two methods are studied for comparison. Following conclusions are made from the study. 1. The UV spectrophotometric method after oxidation appears to be more convenient and accurate in determination of the T-N contents than the summation method after separate determination. 2. The UV method suffers of the interference by Cr(VI) and bromide ions so that it cannot be recommended for the samples of sea water. 3. The interference of carbonate ions in the oxidized sample to the UV method can be overcome by adjusting the pH of the solution to be between 2 and 3. 4. The UV method seems to be more favorable in sense of time-saving and labor-saving. 5. For the determination of T-N, the UV method appears to be superior than the summation method. But summation method turns out to be indispensable in studying of the transformation of nitrogen species in the aquatic environment or in the water treatment processes.
활성슬러지법에 의한 하수처리공정별 인의 거동에 관한 연구
조성렬,김충래,김학성 ( Sung Yul Jo,Chung Rae Kim,Hag Seong Kim ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.4
The purpose of this study is to survey the phosphorus behavior and its chemical forms in the municipal sewage treatment processes. Samples for analysis were taken from Cheongju sewage treatment plant once a month during the period from March to October in 1995. Total phosphorus inlet concentration into the sewage treatment plant is 3.95㎎/ℓ, and its fractions are TRP 57.8%, THP 22.2% and TOP 20.3%. TP concentration was increased about 50% higher than that of inlet concentrations by mixing with overflow from thickener and anaerobic digester. Suspended total phosphorus is removed about 42.8% in the primary settling tank, and phosphate fraction-DTP and STP-of inlet into the biological process is nearly same. The DTP removal is about 55% by the biological process. Total phosphorus concentration of the final effluent is 1.33㎎/ℓ, and it was found that the main forms were TRP(84.2%).