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전력감시제어설비의 프로토콜 변경에 따른 데이터처리 품질측정
이용두,최성만,유철중,장옥배,Lee Yong-Doo,Choi Seong-Man,Yoo Cheol-Jung,Chang Ok-Bae 한국정보처리학회 2005 정보처리학회논문지D Vol.12 No.7
본 논문에서는 시스템 사용현황을 파악할 수 있는 데이터를 최대수용 트래픽양과 실제 트래픽량으로 구분해서 측정하며 프로토콜 변경에 따른 트래픽량 변화와 사고발생시의 과부하 조건에서의 트래픽을 분석할 것이다. 이로 인해 전력감시제어설비의 안전성을 극대화할 수 있는 계기를 미련하고자 한다 또한, 현재 유통되고 있는 트래픽이 어느 정도인지를 알고 그 증가율 추세를 파악하여 앞으로 예상되는 트래픽량을 미리 예측하여 필요한 대역폭을 미리 확보하는 자료로 활용하고, 네트워크 정보분석을 통한 한정된 네트워크 자원의 효율적인 배치로 안정된 전력감시페어시스템의 운용을 가능하게 함으로써 신뢰성을 향상시킬 수 있다. In this paper, the maximum traffic quantity and actual traffic quantify of the data which are needed to grasp the statement of a system will be measured more accurately. A concrete quality measurement will be conducted by analysing a change of traffic quantity according to a protocol change and traffic under an overload condition when there is an accident. As a result can make an opportunity to maximize safety of power SCADA. Furthermore, future traffic quantity can be prospected by knowing current traffic quantity and grasping the rate of increase by the analysis and the information can be used as data to secure the band width in advance. It can make stable operation of power SCADA by arranging the limited network resources efficiently by information analysis of a network and expects more confidence.
Bacillus sp. 를 이용한 분뇨처리공정에 있어서 질소의 효율적 처리를 위한 최적운전조건에 관한 연구
이용두(Yong Doo Lee) 한국수처리학회 2000 한국수처리학회지 Vol.8 No.4
N/A The most traditional approach used for removing pollutant in wastewater is activated sludge processes. Since existing processes, however, have limited abilities in removing nutrient salt so are not able to satisfy the criteria of water quality which is being strengthened. Therefore, current approaches propose the treatment systems which are able to be used for removing the nutrient salt. The target plant of this paper is equipped with night soil treatment system using Bacillus sp; This system is fully able to utilize the previous facilities which are used in activated sludge process, and also has high efficiency in removing not only organic materials but also pollutant such as T-N, T-P nutrient salt. In this paper, I studied for finding the optimized operation conditions in night soil treatment using Bacillus sp. suitable for this plant. As a result, DO represented 1∼2㎎/ℓ when MLSS in aerobic digestion tanks of this system is 8000㎎/ℓ∼10000㎎/ℓ and the removal efficiency of T-N, BOD, COD, SS shows very high, greater than 95%, 98%, 92%, 98% respectively. Therefore, it can be known that the maintenance of MLSS and DO in aerobic digestion tanks is very important. Also, a number of Bacillus sp. grown up to FILAMENT are detected in FLOC, and more Bacillus sp. of endospore near to aerobic digestion tanks 4. The number of Bacillus sp. in aerobic digestion tanks is 10^5∼10^6㎖^(-1).
전기분해 처리에 의한 양식장 배출수의 수질특성에 관한 연구
이용두(Yong Doo Lee),김창영(Chang Young Kim),강문필(Moon Pil Kang) 한국수처리학회 2002 한국수처리학회지 Vol.10 No.1
N/A This study was carried out to test the feasibility of electrochemical method in the treatment of aquacultural effluent and to determine the optimal conditions of operating parameters including applied voltage and reaction time. In electrolysis, dioxide iridium coated titanium (Ir0_2/Ti) and stainless steel plate were used for anode and cathode respectively. Possible optimum range for these operating variables are experimentally determined. In experiment of batch system, COD_Mn removal rates were 32.8%, 44.6% and 57.0%. And removal rate of ammonia were 62.0%, 70.4% and 79.1% when electrical density were 35,71A/㎡, 71.42A/㎡ and 107.14A/㎡. It was observed that the removal rate of organic matters and ammonia is proportional to the current density and the retention time. In experiment of continuous system, variation of COD_Mn, SS and ammonia were respectively 25.8∼10.2, 29.3∼15 ㎎/l and 3.57∼0.73 ㎎/l when the removal of organic matters and ammonia is conducted at the same time. Because oxides, such as hyperchloric ions, interfere the process of oxidation of ammonia, the removal rate get reduced. After ammonia is removed, organic matters are oxidized. Therefore it is estimated that the ammonia should get removed first.
이용두(Yong Doo Lee),허목(Mock Huh),한지용(Ji Yong Han) 한국수처리학회 1998 한국수처리학회지 Vol.6 No.3
This study examined the influence of according as aeration/mixing time, fill time, aeration interval with Sequencing Batch Reactor(SBR) process of laboratory scale for removal of nitrogen and phosphorus in sewage of the cheju. The experiment according to aeration/mixing time controlled in 6 hr reaction time, each 90min/270min, 180min/180min, 270min/90min, 360min/0min. At this time, fill time controlled 6 hr same the reaction time. The experiment according to fill time controlled in 6 hr reaction time, each 2, 4 and 6 hr. At this time, aeration/mixjng time controlled 90min/270min from 1st experiment. The experiment according to aeration interval processes for compare with optimum condition from 2nd experiment and just changed aeration interval in reaction time. The result of experiment when aeration/mixing time controlled 90min/270min(1/3) and fill time controlled 6hr, also a repeated operation 6 times aeration/mixing in the reaction time, was showed the best removal efficiency of organics, nitrogen and phosphorus.
이용두(Yong Doo Lee),허목(Mock Huh),현해남(Hae Nam Hyun) 한국수처리학회 1998 한국수처리학회지 Vol.6 No.3
Ozone is a relatively new water quality management tool in the green industry. This study was conducted to remove agricultural medicines for golf course pond using ozone. And one another, to investigate behavior of algae using ozone. The results of this experiments are as followings. 1. Improvement of transparency is increased 30㎝(or degree) after 30 days of Ozone Delivery. 2. The removal rate of Chlorophyll-a is about 80%. 3. SS dropped 77%, T-N decreased about 30%, T-P decreased 84%. 4. Agricultural medicines quickly decrease compared with control ponds.
이용두(Yong Doo Lee),김상규(Sang Kyu Kim),허목(Mock Huh),김현희(Hyun Hee Kim),정정호(Jeong Ho Chung) 한국수처리학회 1999 한국수처리학회지 Vol.7 No.2
This study was performed to investigated the effects of coastal fishing ground by sewerage effluents. Mainly seawater quality and sediment was estimated by diffusion Model(Princeton Ocean Model). It can be shown that there is no significant seasonal variations of effluent quality in this sewerage plant and COD concentration of seawater was a little effected by sewerage effluents. T-N concentration of outfall station was 22.3ppm, far from 200m of outfall station, T-N concentration was very quickly decrease to 0.053ppm and in case of T-P concentration of outfall station was 3.6ppm, far from 800m of outfall station, T-P concentration was decrease to 0.0055ppm.