• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1996년도 하계학술대회 논문집 B
• /
• pp.793-796
• /
• 1996

This study proposes a new algorithm which performs a production simulation under various constraints and maintains computational efficiency. In order to consider the environmental and operational constraints, the proposed algorithm is based on optimization techniques formulated in LP form In the algorithm, "system characteristic constraints" reflect the system characteristics such as LDC shape, unit loading order and forced outage rate. By using the concept of Energy Invariance Property and two operational rules i.e. Compliance Rule for Emission Constraint, Compliance Rule for Limited Energy of Individual Unit, the number of system characteristic constraints is appreciably reduced. As a solution method of the optimization problem, the author uses Karmarkar's method which performs effectively in solving large scale LP problem. The efficiency of production simulation is meaningful when it is effectively used in power system planning. With the proposed production simulation algorithm, an optimal expansion planning model which can cope with operational constraints, environmental restriction, and various uncertainties is developed. This expansion planning model is applied to the long range planning schemes by WASP, and determines an optimal expansion scheme which considers the effect of supply interruption, load forecasting errors, multistates of unit operation, plural limited energy plants etc.

• 국토계획
• /
• 제54권2호
• /
• pp.5-16
• /
• 2019

The purpose of this study is to analyze the spatial characteristics of business-type-changed parcel in the Hongik-University commercial area, from the view point of commercial gentrification. A commercial gentrification occurs through a business-type-change in a spatial basic unit (microscopic spatial unit such as parcel) of an area which has not been considered in relavent policies and research. So, this study analyzed the spatial characteristics of business-type-changed parcels using the Cox's proportional hazard regression model. The main results of this study are as follows. First, as new developments in the adjacent area occur, the business-type-change probability increases. Second, by the commercial area division, the business-type-change probability is different. Finally, the accessibility is better, the probability is higher. These results could suggest that a consideration of the spatial characteristics form microscopic viewpoint is necessary to understand the commercial gentrification. And these could be used as basic data for a gentrification diagnostic and management system, which can predict gentrification from the view point of business-type-change on the basis of a parcel.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권2호
• /
• pp.973-979
• /
• 2021

The purpose of this paper is to examine the effect of tax planning on firm value of the non-financial firms listed in Vietnam, moderated by the state ownership. In this paper, effective tax rate is used to measure the tax planning; the state ownership is measured by the percentage of state equity holdings, and the firm value is measured by Tobin's Q. The data research is collected from audited financial statements and other statistical documents of 513 firms in the period of 2015-2019, provided by The FiinGroup (Vietnam). According to that, this paper uses quantitative research methods for the panel data. Regression analysis with GLS shows that the tax planning has a negative effect on firm value. In more detail, the association is not a variable in its direction when state ownership takes the role of a moderator. That means, in the perspective of principal-principal conflict, government should improve institutional environment to prevent firms form breaking the rules, especially accounting standards and principles. Assets allocation in tangible assets or making use of large size advantage should be taken into account. In the long run, firms should concentrate on the deployment of resources and the experience of knowledgeable practitioners to produce effective results.

• 한국농촌건축학회논문집
• /
• 제23권4호
• /
• pp.55-62
• /
• 2021

This study conducted a management system and business analysis related to urban and architecture in local small and medium cities. The current status of the management department of the master plans, which were established based on the laws related to the spatial environment and implemented projects based on them, was analyzed, and the problems were derived. The basic urban master plan of the local government is classified as a hierarchical higher plan than other plans established within the same city, but there was a problem in that the timing of each plan was different. As a problem, the contents of the sub-plan were not included in the upper plan, or the opposite phenomenon occurred. In addition, the management entity of the master plan and sub-projects was different. To solve this problem, it is necessary to form a consistent structure of systematic planning and management subjects. In addition, in the future planning stage, it is necessary to establish a master plan establishment system according to hierarchies. This study is meaningful in that it can be used to establish a master plan establishment system according to hierarchy in the future planning stage and to establish the same management entity as the master plan in the projects stage.

• 농촌계획
• /
• 제13권3호
• /
• pp.83-90
• /
• 2007

The purpose of main entrance was to protect the house with the wall and working for the house-gate where people come in and go out. On the other hand, the type of main entrance is changed variously depended on the materials for house and method of construction. Eleven villages in the Chungyang-Gun where the environment of rural villages is well maintained was chosen and researched to make data. These data of visual landscape elements were analysed by using the SPSS 12.0 for Windows. Relations of the visual component elements were analysed by the analysis for frequency and analysis for crosstab. From the above research we could conclude below results. Through review of the pre-researching and researching literatures, 11 types of visual component elements were selected such as the types of the gate, the looking through degree of the gate, the material of the gate, the color of the gate, the plan of the house, the material of the roof, a material of the wall, a color of the wall, the form of the penetration, the area to put, the area of a site, the year of the constructing a building. For the types of the gate, the gate from without the roof has been the most popular since it appeared 41.5%. For the looking through degree of the gate, a complete blockade form has been the most popular since it appeared 63.2%. For the material of the gate, the iron plate has been the most popular since it appeared 32.1%. For the color of the gate, color has been the most popular since it appeared 68.4%. For the plan of the house, 'ㄷ' form has beneath most popular since it appeared 38.3%. For the material of the roof. The Zinc has been the most popular since it appeared 51.9%. For a material of the wall, A cement mortar has been the most popular since it appeared 47.7%. For a color of the wall, Without tile color has hem the most popular since it appeared 67.0%. For the form of the penetration. The plain form has been the most popular since it appeared 54.0%. For tile area of a site, $100m^2{\sim}200m^2$ has been the most popular since it appeared 39.0%. The results of this study can provide to use of indicates four rural-housing reform. From now on, the results look forward to offering the meaning directions for the improvement of rural house gates.

• International Journal of Precision Engineering and Manufacturing
• /
• 제7권1호
• /
• pp.3-8
• /
• 2006

This paper deals with an automated computer-aided process planning and die design system by which designer can determine operation sequences even if they have a little experience in process planning and die design for axisymmetric products. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution on the level of the required forming loads by controlling the forming ratios. Especially in die design module optimal design technique and horizontal split of die insert were investigated for determining appropriate dimensions of components of multi-former die set. Results obtained, using the modules, enable the design and manufacture of a die set for a multi-former to be more efficiently performed.

• 한국경영과학회지
• /
• 제34권2호
• /
• pp.77-90
• /
• 2009

Total profit level Increases if a company increase the cost for achieving R&D related goals of equipment productivity enhancement, production cost saving, or for achieving equipment scale target, sales volume goal. But how much money should be invested to achieve a certain level of profit? We formulated the model to set the optimal goal levels to minimize the investment cost under the constraint that certain level of total profit should be guaranteed. This model derived from a case of P steel company. We found that this should be considered in relation with the production sales planning (known as optimal product mix problem) to guarantee the profit. We suggested a nonlinear programming model, 3 valiant form of the p+roduct mix problem. We can find the optimal Investment level for the R&D related goals or sales volume goal, equipment scale target for the P steel company using the model.

• 한국조경학회지
• /
• 제19권3호
• /
• pp.27-40
• /
• 1991

For the establishment of district planning in natural parks, vegetationin the most significant point. Consequently, district plan should be made basically under phytosociological investigations. The purpose of this paper is to conserve vegetation in the district planning at natural park(Nam Han San Sung provincial natural park). The result of vegetation survey are as follows : As an actual vegetation 13 communities are recognized. Those are Quercus mongolica-Carpinus laxiflora community, Quercus mongolica-Rhododendron schlippenbachii community, Quercus serrate community, Betula platyphylla var. Japonica community, Quercus dentata community, Quercus mongolica-Pnuus densiflora community, Quercus acutissima community, Robinia pseudo-acacia community, Alnus hirsuta community, Castanea crenata community, Quercus variabilis community, Pinus densiflora community, Pinus rigida community, weed community on cultivated land(Form land), Larix leptolepis reforested land, cut over area and non-vegetation area. The grade of vegetation naturalness was divided into five degrees by characteristics of actual vegetation. I intended to make zoning plan for protection of vegetation with a special attention to the grade of vegetation naturalness and I discussed the necessity of the improvement of existing district plan. District plan was proposed as Fig. 5.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2001년도 추계학술대회 논문집
• /
• pp.191-194
• /
• 2001

We consider a postal transportation planning in the transportation network of the form of hub and spoke. Given mail sorting centers and an exchange center, available vehicles and amount of mails to be transported between mail sorting centers, postal transportation planning is to make a transportation plan without violating various restrictions. The objective is to minimize the total transportation cost. To solve the problem, a tabu search algorithm is Proposed. The algorithm is composed of a route construction procedure and a route improvement procedure to improve a solution obtained by the route construction procedure using a tabu search. Computational results show that the proposed algorithm can solve practically sized problems within a reasonable time and the quality of the solution is acceptable.

• 경영과학
• /
• 제25권1호
• /
• pp.75-91
• /
• 2008

Information strategy planning (ISP) pursues alignment of business strategy and IT (Information Technology) strategy as well as derivation of feasible and valuable IT projects. However, conventional ISP methodology hardly obtains the objectives because of its intrinsic shortcomings. Diverse ways are proposed for the improvement of the conventional methodology including, for example, combination of EA (Enterprise Architecture) with ISP. Meanwhile, six-sigma methodology which is characterized by quantification, scientific and systematic approach, customer orientation, process orientation has been gaining considerable attention and extending its application scope continuously. In this paper, an innovative ISP methodology is proposed by decomposing activities, methods, and tasks from conventional ISP process and reorganizing them into DMADOV six-sigma framework. In addition, the usefulness and applicability of the newly proposed methodology are provided using an electronics company example. The methodology enhance the possibility of producing future oriented and beneficial IT projects by associating IT strategy and the projects in the form of quantified causal relationship. Besides, it can also increase the objectivity of IT vision and strategy.