http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 윤형호(Hyung-Ho Yoon) (검색결과 7 건)
- 무료
- 기관 내 무료
- 유료
-
윤형호 ( Hyung Ho Yoon ),이의영 ( Eui Young Lee ) 한국산업조직학회 2008 産業組織硏究 Vol.16 No.2
본 연구는 서울시 주유소가 어떻게 휘발유 가격을 결정하는지 분석한다. 가격결정 분석을 위해 자치구내의 지역경쟁과 인근경쟁을 구별한다. 우리는 지역경쟁을 위해 Cournot 모형을, 인근경쟁을 위해 비대칭 Salop의 圓都市모형과 Hotelling의 線都市모형을 사용한다. Cournot 분석에서 필요한 시장규모를 알기위해 자치구내 교통유입량을 사용하고 이 규모가 가격에 미치는 영향을 조사한다. 추정모형은 가격에 미치는 지역요인, 개별입지 요인과 주유소 특성을 고려한다. 자치구 교통유입량과 주유소 수의 계수 부호는 Cournot 이론과 일치하며 유의미하다. 한편 인근경쟁을 분석하기 위해 개별입지 특성을 사용하였으며 이들 계수는 최근접 주유소와의 거리를 제외하고 유의하지 않다. 따라서 지역경쟁은 가격에 영향이 있는 반면 인근경쟁은 그렇지 않다. 한편 복합상품 혹은 서비스를 제공하는 주유소는 가격차별을 하고 있다. 예를 들면 세차시설을 가지고 있는 주유소는 휘발유 가격을 높이, 간이정비소를 가지고 있는 주유소는 낮게 받고 있다. 또한 SK와 GS 브랜드 주유소는 가격을 높이 받고 있어 브랜드 별 가격차별이 있다. 마지막으로 토지는 가격에 가장 중요한 영향을 미친다. 본 연구는 개별 주유소 특성과 관련된 비용요인과 경쟁요인이 모두 가격에 영향을 미치는 것을 파악하였다. 따라서 개별 주유소 특성만 고려한 헤도닉 모형은 가격결정의 일부분만 보여줄 뿐이다. 마지막으로 비용요인이 경쟁요인보다 더 가격에 영향을 미침을 알 수 있다. This study analyzes gasoline price determination. We distinguish district and nearby competition. We use Cournot model to analyze district competition and Salop`s circle city and Hotelling`s linear city for nearby competition. We set an estimation equation reflecting competition, costs, and individual characteristics. This model is compared with hedonic model that only considers individual characteristics. We find district competition is significant but nearby competition is not. Multiple products, brand, land price are significant. We find cost is more important in determining price than competition.
-
-
-
-
서울시 공공투자사업관리 합리화 방안 -투자심사 및 민간투자사업 제도를 중심으로-
이세구 ( Se Koo Rhee ),윤형호 ( Hyung Ho Yoon ),김찬동 ( Chan Dong Kim ),김강현 ( Kang Hyun Kim ),손주희 ( Joo Hee Sohn ) 서울시정개발연구원 2009 연구보고서 Vol.2009 No.64
Public investment projects are related with mainly various social infrastructures closely related to citizens` life, and tend to require large-scale financial resources. Such social infrastructures would be provided basically by the public sectors. However, there is a limitation in public provision of those social infrastructures due to limited financial resources in public sector. In Seoul Metropolitan Government, public investment in SOC(Social Overhead Capital) projects has increased every year, and the city has faced with several problems of rational management of public investments. Especially, the proper management of Investment Screening System as a pre-evaluation and the inducement of private capital into public projects are the two main issues to solve those problems in this study. This study has figured out the problems and tried to provide solution to improve the current situation in organization, management process and system aspects for both the Investment Screening System and inducement of private capital into public projects. The suggestions of this study are as follows. For the Investment Screening System, in order to secure the credibility of the results of each and every feasibility studies which are required to provide to the investment screening process, the evaluation of such studies should be performed together with professionals and officers. Also, after the projects have passed the screening process and executed into the budget, the follow-up management of the projects should be strengthened to check, examine or evaluate them whether the initial conditions such as rate of return and others are met or the process are operated feasibly. The guidelines of the investment screening are to be revised periodically for proper screening so as to reflect the administrative environmental change. In addition, the provision of professional training and education to enhance the ability of the personnel who are in charge of investment screening should be considered. For the system of inducing private capital into public infrastructures, first of all, the manual or guideline which contains the process of decision to make, decision to private finance initiative, and suggestion of alternatives must be prepared to utilize for small projects that induce the private capital into and apply the individual laws. The data base the whole process of this system including major issues and remarks of the process should be built so as to improve the future management of these type of projects which induces private capital. The provision of professional training and education to enhance the ability of the personnel who are in charge of inducement of private capital should be considered. This study recommends that the roles of management of the projects that induce the private capital should be consolidated into the Financial Management Division. Finally, this study suggest that the city should consider to establish the new organization to support the city and related officials in public investment projects, especially, the area of investment screening system and inducement of private capital, so as to provide the necessary research and data base to promote the system.
-
회전 관성을 고려한 전달행렬법 기반의 Expansion Joint 진동해석
신동호(Shin, Dong-Ho),김상호(Kim, Sang-Ho),윤형호(Yoon, Hyung-Ho),임희곤(Lim, Hee-Gon),오재응(Oh, Jae-Eung),이정윤(Lee, Jung-Youn) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.7
Simplified formulae for axial and bending natural frequencies of a bellows are developed using an equivalent thin-walled pipe model. The axial and bending stiffness of bellows is determined using lumped transfer matrix method. Transfer matrix method which includes the rotary inertia is used to calculate the natural frequencies for axial and lateral vibration. The result from the simplified formula are verified by those from as experiment result and a finite element analysis. This comparisons show good agreement with the each other.
-
염영진(Young-Jin Yum),임현우(Hyun-Woo Lim),김상호(Sang-Ho Kim),윤형호(Hyung-Ho Yoon),박재만(Jae-Man Park) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Exhaust variable valve is consisted of housing, torsion spring and plate, which is mounted on semi-active muffler of vehicle system. Stiffness and shape of components of exhaust variable valve determine the valve-opening time and make difference in exhaust performance. The valve-opening time is primarily determined by stiffness of torsion spring, engine RPM and exhaust flow rate. In order to estimate the behavior of the valve by considering friction of its components, torsion test for the spring is performed. Experimental stiffness is compared with design value, error between two values is analyzed and regression equation is obtained. The rate of valve-opening and closing is estimated according to the arbitrary spring stiffness derived from the regression equation. The results of analysis suggest that the rate of the valve-opening and closing estimated by the regression equation is consistent with that by the exhaust flow rate.
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
