• 제목/요약/키워드: test cost reduction

검색결과 381건 처리시간 0.027초

GPS/INS에 의한 항공사진측량의 블럭조정 (Block Adjustment with GPS/INS in Aerial Photogrammetry)

  • 송연경;박운용;이재원;김정희
    • 한국측량학회:학술대회논문집
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    • 한국측량학회 2004년도 춘계학술발표회논문집
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    • pp.39-44
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    • 2004
  • In this thesis, two test flights were conducted in Gwacheon and Suwon area to evaluate the performance of accuracy and efficiency through the analysis of results among the three photogrammetric methods, that is, traditional photogrammetry, GPS -Photogrammetry and GPS/INS-Photogrammetry. Test results shows that a large variety of advantages of GPS-Photogrammetry and GPS/INS-Photogrammetry against traditional photogrammetry is to be verified. Especially, the number of ground control points for the exterior orientation could be saved more than 70-80%, and the cost for map production 30-50%, respectively. In addition, it was convinced that the large reduction of control points has not any effect on the block accuracy. It was also proved that the number of required ground control points for GPS/INS-Photogrammetry, is similar to that of GPS-Photogrammetry. Therefore it should be noted that GPS -Photogrammetry is more efficient in the aspect of reduction of mapping cost against GPS/INS-Photogrammetry, installing only an existing GPS receiver on survey aircraft to avoid high economic burden of procurement for integrated GPS/INS equipment.

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웹기반 수요관리 비용효과분석 시스템 (DSM Cost-effectiveness Analysis System based on the Web)

  • 박종진;이창호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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    • pp.757-759
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    • 2005
  • This rarer presents the cost- effectiveness analysis system of DSM programs on the web. The purpose of this paper is to analyze the energy consumption and peak reduction of DSM programs, evaluate the cost-effectiveness for DSM programs, and identify the benefits and the costs for each California Test. The proposed approach is applicable to DSM programs post-conducting in Korea.

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Airline In-flight Meal Demand Forecasting with Neural Networks and Time Series Models

  • Lee, Young-Chan
    • 한국정보시스템학회:학술대회논문집
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    • 한국정보시스템학회 2000년도 추계학술대회
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    • pp.36-44
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    • 2000
  • The purpose of this study is to introduce a more efficient forecasting technique, which could help result the reduction of cost in removing the waste of airline in-flight meals. We will use a neural network approach known to many researchers as the “Outstanding Forecasting Technique”. We employed a multi-layer perceptron neural network using a backpropagation algorithm. We also suggested using other related information to improve the forecasting performances of neural networks. We divided the data into three sets, which are training data set, cross validation data set, and test data set. Time lag variables are still employed in our model according to the general view of time series forecasting. We measured the accuracy of our model by “Mean Square Error”(MSE). The suggested model proved most excellent in serving economy class in-flight meals. Forecasting the exact amount of meals needed for each airline could reduce the waste of meals and therefore, lead to the reduction of cost. Better yet, it could enhance the cost competition of each airline, keep the schedules on time, and lead to better service.

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아파트 고가수조 자동급수장치를 이용한 전력피크 감소 및 전력시장에서의 효과 분석 (The Technology of Peak Demand Reduction using Automatic Water Tank Pumping System on the Apartment And Analysis of Effect of Energy Cost)

  • 이재걸;이윤경;조원우
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 추계학술대회 논문집 전력기술부문
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    • pp.161-163
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    • 2006
  • This paper introduce the technology of peak demand reduction using automatic water tank pumping system on the apartment. That systems on the apartments installed water tank can control pumping(electricity) demand. Generally, system peak demand is occurred at the same time on workday and many water pumps consume electric power randomly. At this point, shift of operating time of water pump can reduce peak demand using automatic water tank pumping system. We were operating this system on some apartments for test of effect of peak demand reduction. and we represent result of demand shift. This result suggests that spread of the automatic water pumping system can contribute to reduce system peak demand and reduce system operation cost.

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트랜스로그 비용함수를 이용한 참치연승어업 규모의 경제성 분석 (An Analysis on Economies of Scale for Tuna Distant Longline Fishery Using a Translog Cost Function)

  • 조훈석;남종오
    • 수산경영론집
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    • 제51권3호
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    • pp.17-31
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    • 2020
  • The purpose of this study is to identify economic situation on scale of tuna distant longline fishery by analyzing its economies of scale using the cost function. To analyze its economics of scale, the deep-sea fishing statistics were used from 2012 to 2016. In detail, the number of panels for estimating the cost function was 68 tuna distant longline vessels from 2012 to 2016, and the total number of observations over the five years were 340. As a final model, the two-way fixed effect model based on the translog cost function was adopted through the F test, the Breusch-Pagan test and the Hausman test. As a result of the analysis, it was found that tuna distant longline fishery between 2012 and 2014 was diseconomies of scale, the fishery between 2015 and 2016 was economies of scale. However, the economic indicators of the scale from 2012 to 2016 were almost close to zero, indicating that the constant returns to scale, the optimal scale, were reached. Therefore, in the situation where the amount of fishery resources in the world continues to decrease, it is necessary to prepare a method to obtain economic benefits through scale maintenance and reduction rather than indiscriminate scale expansion.

외식 산업의 식품 안전 지향 정책과 고객 만족, 비용 절감, 고객 선점, 식품 안전 사고 예방간의 상관 관계 (The Relationship between Food Safety-oriented Policy and Customer Satisfaction, Cost Reduction, Customer Prior Occupation, Prevention of Food Safety Accidents in Foodservice Industry)

  • 이선호
    • 한국조리학회지
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    • 제13권3호
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    • pp.317-327
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    • 2007
  • The purpose of this study was to explore the relationship between the food safety-oriented policy and the survey on its effect in foodservice industry. The current thesis was based on the questionnaire survey conducted between January and March 2006 for seven food service companies. 240 questionnaires were distributed to each of the selected restaurants, from which a total of 200 questionnaires were collected. The results of this study were analyzed with the frequency analysis, correlative analysis and regression analysis using the SPSS 12.0 package program. The results of the test of hypotheses can be summarized as follows. We find that, as for food safety-oriented policy factors, there is a significant relationship among the survey factors including customer satisfaction, cost reduction, customer prior occupation, accident prevention and suitable relation. The current analysis exhibits favorable results in the food safety-oriented policy and the survey factors. Thus, foodservice management needs to employ food safety-oriented policy aggressively.

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지상무기체계 ILS 시험평가 개선방안 (A Study on the Improvement of ILS Test & Evaluation for Ground Weapon Systems)

  • 최시영;최석철
    • 한국국방경영분석학회지
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    • 제30권1호
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    • pp.168-188
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    • 2004
  • Integrated Logistic Support (ILS) is a management and technical process whereby all the diverse elements needed to fully operate, maintain, and totally support a materiel system in the field are identified, developed, and deployed simultaneously and on an equal priority with the item of materiel being supported. The test and evaluation (T&E)of ILS act the important role of reduction of life-cycle cost and keeping of good performance for weapon system. In this article, we suggest the alternatives for improvement in the test and evaluation of ILS during weapon system acquisition. It is hoped that this research is valuable and beneficial to persons related weapon system acquisition, in order to maximize the efficiency of defense acquisition management by reducing the life-cycle cost and enhancing the quality of weapon system.

측면충돌모의시험 방법 개발과 응용 (Development of Side Impact Crash Simulation Methodology and Its Applications)

  • 하영호
    • 한국자동차공학회논문집
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    • 제8권1호
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    • pp.101-109
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    • 2000
  • Occupant protection in the side impact of a car became one of the most important issues of car crashworthiness due to high injury level in a side impact crash. An accurate simulation of the side impact crash is an essential tool for the reduction of development time and cost for side impact safety system. This paper describes a new test methodology that can accurately generate the crash pulses of a vehicle and a door in a very cost-effective manner, and then evaluates the injury values of the dummy for the various sled pulses. This test methodology is simple and easy to approach because the door velocity is controlled by the hydraulic actuator and brake and the seat velocity is only adjusted by the friction force of the hydraulic brake. The superiority of the proposed test methodology is proven by the evaluation of dummy's injury values according to the change of the pressure of the hydraulic brake and by the application as a tool for the development of side airbag.

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가격할인이 있는 단일품목 동적 재고모델의 발주정책을 위한 발견적 기법 (A Heuristic Method for Ordering in the Dynamic Inventory System with Quantity Discounts)

  • 이영조;강맹규
    • 대한산업공학회지
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    • 제12권2호
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    • pp.77-87
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    • 1986
  • This paper presents a heuristic method for solving the discrete-time ordering problem with quantity discounts and deterministic, time-varying demand. This algorithm utilizes a variation of the incremental cost approach(ICA) to determine a near optimal solution. The ICA is the method which reduces the total cost with reduction of the number of orders by one. In order to reduce the number of orders, if the incremental cost for one of the periods is negative, the demand of the period should be purchased in its immediate preceding period. In order to test the performance of this algorithm, an experiment is conducted that involves a large number of test problems covering a wide variety of situations. The result of the experiment shows that the proposed algorithm has 80.5% better solutions than the adjusted part period algorithm(APPA), which is known to be the best heuristic method.

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클레임코스트를 고려한 프로젝트의 시간-비용 혼합정수계획모형 (Considering Claim Costs in Project Time-Cost Mixed Integer Programming Model)

  • 김종열;강창욱;황인극
    • 산업경영시스템학회지
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    • 제34권3호
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    • pp.97-105
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    • 2011
  • Previous researches have focused on the efficiency of project execution and the satisfaction of internal customers In view of the fact that a project is successful if any defects are not found in the short-term performance test of the project final outcome. To execute a project that both internal customer and external customer are satisfied in terms of longer-term benefit perspective, the project claim costs (PCC) which may occur for the warranty period of the project final outcome should be considered. We propose a model included PCC to the linear programming between time and cost to expedite a project and perform the validity test by applying the model to an example project. This model and related procedure will contribute to overall project activities' cost reduction by taking preventive actions for PCC.