신경망 적응제어기의 성능향상에 관한 연구

김관수,최재석,이순영,장순용 慶尙大學校 工科大學 自動化및컴퓨터應用技術硏究所 1999 自動化 및 컴퓨터應用技術 Vol.6 No.1

In this paper, the direct and indirect neural adaptive controller are combined based on the Lyapunov synthesis approach. The proposed adaptive controller is constructed from RBF neural network and a set of fuzzy IF-THEN rules. And the weighting parameters are adjusted on-line according to some adaptation law for the purpose of controlling the plant to track a given trajectory. In this scheme, fuzzy IF-THEN rules are used to decide the combined weighting factor. It is shown that all the signals in the closed-loop system are uniformly bounded under mild assumptions. The effectiveness of the proposed control scheme is demonstrated through the control of one-link rigid robotics manipulator.

A Study on Inactivation of Pathogenic Bacteria for Nutrient Solution Recycling Using Advanced Oxidation Processes

Jang, Gwan-Soon,Nam, Yi 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5

This study was conducted to test the applicability of hydroxy radical reactor system, which applied advanced oxidation processes, to sterilize pathogenic bacteria for nutrient solution recycling in closed hydroponics. Removal efficiency was tested on 25 L of nutrient solution maxed with 10 mL culture solution of bacteria, E. coli, and R. solanacearum in a pilot tank. The testing conditions included various levels of hydroxy radicals resulting from air flow rates of 40, 80, and $120L\;min^{-1}$, and 12 hours processing time. The removal of bacteria, E. coli, and R. solanacearum by hydroxy radical in nutrient solution was significantly increased with an increase in the flow rate of the air from $40L\;min^{-1}$ to $120L\;min^{-1}$. The optimum removal efficiency was achieved at an air flow rate of $120L\;min^{-1}$ for 2 hours treatment. There were no significant differences in removal efficiency among bacteria, E. coli, and R. solanacearum for tested level and time of hydroxy radical. These results verified the efficiency of hydroxy radical in removing the pathogenic bacteria and the applicability of hydroxy radical reactor system in the field.

The Removal of Petroleum Hydrocarbon from Fine Soil in Soil Washing Water using Advanced Oxidation Processes

Gwan-Soon Jang 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.5

This study was performed to test the applicability of the ozone/hydroxy radical reaction system, which applied advanced oxidation processes, to remove total petroleum hydrocarbon (TPH) from the fine soil in washing water of the soil washing process. Removal efficiency was tested on 40 L of washing water in a pilot reaction tank. Fine soil contaminated with 800 mg kg<SUP>-1</SUP> TPH was prepared at 5% and 10% suspended solids. Testing conditions included ozone/hydroxy radical flow rates of 40, 80, and 120 L min<SUP>-1</SUP>, and processing time of 2 to 12 hours. The removal efficiency of petroleum hydrocarbon from water waster by ozone/hydroxy radical was increased with higher flow rates and lower percentages of suspended solids. Optimal efficiency was achieved at 80 L min<SUP>-1</SUP> flow rate for 4 hours for the 5% suspended solids, and 120 L min<SUP>-1</SUP> for 6 hours for the 10% suspended solids. These results verified the efficiency of hydroxy radical in removing TPH and the applicability of the ozone/hydroxy radical reaction system in the field.

The Removal of Petroleum Hydrocarbon from Fine Soil in Soil Washing Water using Advanced Oxidation Processes

Jang, Gwan-Soon 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.5

This study was performed to test the applicability of the ozone/hydroxy radical reaction system, which applied advanced oxidation processes, to remove total petroleum hydrocarbon (TPH) from the fine soil in washing water of the soil washing process. Removal efficiency was tested on 40 L of washing water in a pilot reaction tank. Fine soil contaminated with $800mg\;kg^{-1}$ TPH was prepared at 5% and 10% suspended solids. Testing conditions included ozone/hydroxy radical flow rates of 40, 80, and $120L\;min^{-1}$, and processing time of 2 to 12 hours. The removal efficiency of petroleum hydrocarbon from water waster by ozone/hydroxy radical was increased with higher flow rates and lower percentages of suspended solids. Optimal efficiency was achieved at $80L\;min^{-1}$ flow rate for 4 hours for the 5% suspended solids, and $120L\;min^{-1}$ for 6 hours for the 10% suspended solids. These results verified the efficiency of hydroxy radical in removing TPH and the applicability of the ozone/hydroxy radical reaction system in the field.

A Study on Inactivation of Pathogenic Bacteria for Nutrient Solution Recycling Using Advanced Oxidation Processes

Gwan-Soon Jang,Yi Nam 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5

This study was conducted to test the applicability of hydroxy radical reactor system, which applied advanced oxidation processes, to sterilize pathogenic bacteria for nutrient solution recycling in closed hydroponics. Removal efficiency was tested on 25 L of nutrient solution maxed with 10 mL culture solution of bacteria, E. coli, and R. solanacearum in a pilot tank. The testing conditions included various levels of hydroxy radicals resulting from air flow rates of 40, 80, and 120 L min<SUP>-1</SUP>, and 12 hours processing time. The removal of bacteria, E. coli, and R. solanacearum by hydroxy radical in nutrient solution was significantly increased with an increase in the flow rate of the air from 40 L min<SUP>-1</SUP> to 120 L min<SUP>-1</SUP>. The optimum removal efficiency was achieved at an air flow rate of 120 L min<SUP>-1</SUP> for 2 hours treatment. There were no significant differences in removal efficiency among bacteria, E. coli, and R. solanacearum for tested level and time of hydroxy radical. These results verified the efficiency of hydroxy radical in removing the pathogenic bacteria and the applicability of hydroxy radical reactor system in the field.

대전지역 자연환경림 관리 및 기능평가를 위한 물질순환 모델화

장관순(Gwan-Soon Jang),정헌준(Heon-Jun Jeong) 한국환경관리학회 2006 環境管理學會誌 Vol.12 No.1

대전지역에서 생물지화학적 물질순환 관점으로 대기오염물질이 생태계로 유입되는 강우(WD)로부터 시작하여 삼림수관으로 통과하는 임내우(TF)와 수간류(SF) 그리고 토양배출수(DS)로 거동하는 이온 flux를 측정하여 산성강하 물질에 대한 삼림의 산 정화능력을 평가하였다. 평가는 H?와 양이온 flux를 주요 인자로 취급하였고, 두개의 삼림지역에서 2002년 4월부터 12월까지 조사가 이루어졌다. 조사 기간동안, 활엽수림지역에서 H? flux는 WD가 0.1kmolc h?¹, TF+SF로는 0.03 이었으며, 양이온 flux는 WD가 1.96 kmolc ha?¹ 그리고 TF+SF로는 3.36으로 측정되어 WD로부터 유입된 H?는 수관을 통과하면서 0.07 kmolc ha?¹이 소비되었다. 반면에 수관으로부터 용탈되어 나온 양이온은 1.40kmolc ha?¹에 해당되었다. 침엽수림지역에서 H?의 유입량은 1.1 kmolc ha?¹, TF+SF로는 0.09로 측정되었고, 수관에 의한 H? 소비는 0.01 kmolc h?¹로서 활엽수림보다 약 7배 낮았다. 양이온 flux는 유입량이 2.05 kmolc h?¹, TF+SF에서는 2.93, 그리고 수관으로부터 용탈은 0.89 kmolc ha?¹로 활엽수림보다 낮았다. DS에 대한 양이온 flux는 침엽 수림지역에서 3.41kmolc ha?¹ 그리고 활엽수림지역에서 2.16으로 이들 지역에서 유입량 1.96~2.05 kmolc ha?¹보다 배출량이 많아 양이온 flux 수지는 모두 음(-)의 균형을 나타내고 있었다. 조사지역에서 보이는 있는 음(-)의 물질수지는 영양염류가 토양에 축적되는 것보다 토양으로부터 유실되는 양이 더 많아 산성강하물에 의한 토양산성화를 방지하고 토양 양료보전을 위한 노력이 필요함을 의미한다. To verify acid neutralization capacity against atmospheric deposition in two forest ecosystem, Taejeon, biogeochemical proton and base cation fluxes were estimated using data on wet deposition(WD), throughfall(TF), stemflow(SF), and discharge from soils(DS) from April to December 2002. In deciduous ecosystem during investigation period, proton flux was 0.1 kmolc ha?¹ for WD, 0.03 for TF+SF, and base cation flux was 1.96 kmolc ha?¹ for WD, 3.36 for TF+SF, indicating that atmospheric acid input was neutralized through forest canopy. In deciduous canopy proton consumption was 0.07 kmolc ha?¹ and net canopy leaching of base cation was 1.40 kmolc ha?¹. In coniferous ecosystem, proton flux was kmolc ha?¹ for WD, 0.09 for TF+SF and base cation flux was 2.05 kmolc ha?¹ for WD, 2.93 for TF+SF. Proton consumption in coniferous canopy appeared 7 times lower than one in deciduous canopy and net canopy leaching of base cation was 0.89 kmolc ha?¹, indicating that acid neutralization capacity for atmospheric acid input in two forest ecosystem excelled in decidous ecosystem. DS fluxes in deciduous and in coniferous were 3.4 1kmolc ha?¹ and 2.16 kmolc ha?¹, respectively and base cation budgets in two ecosystem showed negative balance of loss nutrient element from soil.

이동식 토양세척 장치의 현장 적용성에 관한 연구

장관순(Gwan-Soon Jang) 한국환경관리학회 2018 環境管理學會誌 Vol.24 No.2

국내에서 오염토양 관리가 강화되면서 오염부지로부터 정화대상 토양을 외부로 반출하여 정화처리 하는 것이 제한적이다. 따라서 기존의 반출 토양세척기술에 대한 대안으로 토양세척 공정을 최적화로 구현한 이동식 토양세척 장치를 개발하여 점토함량이 13~24 % 정도 그리고 TPH가 약 5,000 mg/kg의 고농도로 오염된 토양을 대상으로 처리용량 6 ton/hr으로 정화 처리한 결과, 오염농도 대비 90 % 이상의 정화효율을 얻어서 이동식 토양세척 장치의 현장적용이 가능하였다. Regulations for removing contaminated soil from the target site for management of contaminated soil in Korea have been tightened. As an alternative to conventional contaminated soil washing methods, the mobile soil washing systems have been developed that optimize processes for Wash & Separation, Setting and Filtering. The result of washing the soil contaminated with clay content of 13~24 % or less and a hight concentration TPH of about 5,000 mg/kg for mobile soil washing installation with treated capacity of 6 ton/hr was more than 90 % compared to the pollution concentration. Therefore, the mobile soil washing installation was able to be applied on field.

국가통합교통체계효율화법 개정에 따른 서울시 통행실태DB의 효율적 구축·운영방안 연구

김순관 ( Soon Gwan Kim ),이신해 ( Shin Hae Lee ),권순실 ( Soon Sil Kwan ),장효석 ( Hyo Seok Jang ) 서울시정개발연구원 2010 연구보고서 Vol.2010 No.5

To collect preliminary data for transportation planning and policy making in the rapidly changing transportation environment in the Seoul metropolitan area, two different surveys on travel behavior have been recently conducted: the Household Travel Survey within the capital region, which is a census on individual trips that has been conducted since 1996, and the Passenger Travel Survey between regions and in the metropolitan areas, which has been part of national transportation research since 1998. However, with the amendment of the National Transport System Efficiency Act and the release of the first Guidelines for the National Traffic Survey, a revision of methods and contents of existing surveys is required. Two types of surveys are planned to be done jointly, but there appears to be various obstacles such as differences in survey times and methods, or weak data links. This study analyzes the recently amended National Transport System Efficiency Act in order to come up with necessary actions and to figure out the difficulties in the National Passenger Origin-Destination (OD) Travel Survey, which is currently under development. Firstly, Choice-based Sampling has been suggested as a supplementary survey to the administrative sampling method. Secondly, as a means of increasing sample size, a supplementary OD survey for bicycles and freight has been proposed, Also, to make better use results of household travel surveys, it is recommended to develop an advanced modal index, to estimate public transit OD through transportation card data, and to improve passenger counting systems that include subway transfers.

대도시 및 주변의 토양에서 pH와 주요 양이온의 장기적인 변화에 대한 고찰

장관순(Gwan-Soon Jang) 한국환경관리학회 2003 環境管理學會誌 Vol.9 No.4

일본 냉온대 지역 중 산성퇴적물의 영향을 받는 활엽수림에서 DOC 용탈에 관한 연구

장관순(Gwan-Soon Jang) 한국환경관리학회 2002 環境管理學會誌 Vol.8 No.4