http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김학영,류홍서,Kim, Hak-Young,Ryoo, Hong-Seo 한국국방경영분석학회 2006 한국국방경영분석학회지 Vol.32 No.2
본 연구는 최적화의 목표계획법을 이용하여 근무 편성권자가 경계병 근무계획시 의도하는 부대목표와 병사 선호도의 조합에 따른 최적 근무계획을 작성하는 보편적인 모형을 제시한다. 본 연구에서 제시하는 모형의 실용성 및 우수성을 시험하기 위하여 실제 경계부대의 자료와 다양한 부대목표(선 후임병의 조 편성, 교육훈련 균등할당, 분대 건제유지) 및 병사목표(근무량의 균등할당, 비번 편성, 선호병사와의 근무편성)를 사용한 다양한 실험을 실시하였다. 이 실험을 통하여, 본 연구의 모형을 이용한 최적 경계근무명령서 작성과 우발적 상황에 따른 신속한 경계근무 재계획이 효율적으로 이루어질 수 있다는 점을 보였으며, 나아가 본 연구의 모형이 실제 경계부대 근무편성 문제해결에 용이하게 적용될 수 있다는 점을 입증하였다. This paper presents a mixed linear and integer goal programming (GP) model to aid in strategic planning and scheduling of guard soldiers. The proposed model is a general-purpose model, hence can be used to produce an optimal schedule with respect to any user-provided combination of guard post objectives and soldier preferences. We extensively test the usefulness of the model on a real-life dataset from a guard post in the ROK Army with using three objectives set by the guard post and three preferences provided by individual solders. Numerical results and analysis from these experiments show that the proposed guard scheduling model efficiently as well as effectively generates an optimal guard schedule and can also be used for an optimal revision of any existing schedule. In summary, these illustrate that the proposed model can be practically used for optimal planning and scheduling of guard soldiers in guard posts.
김학영(Hak Young Kim),백승욱(Seung Wook Baek),황창환,Hee Son,Se Won Kim 한국연소학회 2009 KOSCOSYMPOSIUM논문집 Vol.- No.39
Fuel lean reburning method is very attractive way in comparison with conventional reburning method for reducing NOX. Meanwhile, the knowledge of the how flue gas re-circulated, temperature distribution and species concentration is crucial for the design and operation of an effective fuel lean reburning system. For this reason, numerical analysis of fuel lean reburning system is a very important and challenge task. In this work, the effect of fuel lean reburn system on NOX reduction has been numerically conducted. And numerical results are verificated by experimental study which has been conducted with a 15㎾ lab scale furnace. Liquefied Petroleum Gas is used as main fuel and reburn fuel. To carry out numerical study, the finite-volume based commercial computational fluid dynamics (CFD) code FLUENT6.3 was used to simulate the reacting flow in a given laboratory furnace. Steady state, three dimensional analysis performed for turbulent reactive flow and radiative heat transfer in the furnace.
김학영(Hak Young Kim),백승욱(Seung Wook Baek),황창환(Chang Hwan Hwang) 대한기계학회 2010 大韓機械學會論文集B Vol.34 No.3
이 연구의 목적은 NOX 저감을 위한 연료희박 재연소 기법과 산화제 다단 연소 기법의 혼합 기법의 실험적 연구를 목표로 한다. 실험용 연소로에서 재연소 연료 분율, 재연소 노즐 직경, 산소부하도 및 재연소 연료 분사 위치등을 고려한 실험을 수행 하였다. 또한, 산화제 다단 연소를 통하여 생성된 유동장이 NOX 저감에 미치는 영향을 연료희박 기법의 NOX 저감율과 비교하는 실험을 수행하였다. 실험을 통하여 연료희박 재연소와 산화제 다단연소 기법의 혼합 기법이 NOX 저감에 미치는 긍정적인 효과를 관찰 하였다. The main goal of this study is to examine the use of a hybrid -fuel lean reburning system with air staging for NOX reduction. The experimental variables include the reburn fuel fraction, sizes of reburn- fuelinjection nozzles, oxygen enrichment ratio, and location of reburn- fuel- injection. The effect of the flow field induced by air- staging combustion on NOX reduction is considered, and then, the NOX reduction rate is compared with only fuel lean reburning system. On the basis of the effectiveness of each De-NOX process, the advantage of using the hybrid reburning system with air staging is determined and discussed.
NOx저감을 위한 연료희박 재연소 기법의 실험 및 수치적 연구
김학영(Hak Young Kim),백승욱(Seung Wook Baek),손희(Hee Son),김세원(Se Won Kim) 한국연소학회 2009 한국연소학회지 Vol.14 No.2
Fuel lean reburning method is very attractive way in comparison with conventional reburning method for reducing NOX. Meanwhile, the knowledge of the how flue gas re-circulated, temperature distribution and species concentration is crucial for the design and operation of an effective fuel lean reburning system. For this reason, numerical analysis of fuel lean reburning system is a very important and challenge task. In this work, the effect of fuel lean reburn system on NOX reduction has been experimentally and numerically conducted. Experimental study has been conducted with a 15㎾ lab scale furnace. Liquefied Petroleum Gas is used as main fuel and reburn fuel. To carry out numerical study, the finite-volume based commercial computational fluid dynamics (CFD) code FLUENT6.3 was used to simulate the reacting flow in a given laboratory furnace. Steady state, three dimensional analysis performed for turbulent reactive flow and radiative heat transfer in the furnace.
김학영(Hak Young Kim),백승욱(Seung Wook Baek),손희(Hee Son) 한국연소학회 2009 KOSCOSYMPOSIUM논문집 Vol.- No.38
Recently, controlling nitrogen oxides(NOx) emission is actually very important task to protect human against environmental pollution. NOx is known as a precursor for photochemical smog, contributes to acid rain and causes ozone depletion. The goal of this study is verifying the effects of reburning, SNCR with air staging hybrid system on NOx reduction. In this article reports the experimental result according to the several experimental cases. It is divided into four sections. Experimental case 1 section was tested about reburning process. Studying the impact that reburn fuel fraction in the reburning zone has on characteristic of NOx reduction. Air staging and hybrid reburning/air staging effects were considered in experimental case 2 part. The effects of air staging on the gas temperature distribution and heat flux were studied. At case 3 part, SNCR process was considered. And finally, reburning, SNCR and air staging hybrid system were studied at case 4. By comparison the effectiveness with several De-NOX processes, we can find the advantage of reburning, SNCR and air staging hybrid system.