• Title, Summary, Keyword: Average Waiting Time

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Forecasting of Real Time Traffic Situation (실시간 교통상황 예보)

  • 홍유식;박종국
    • Journal of Korean Institute of Intelligent Systems
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    • v.10 no.4
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    • pp.330-337
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    • 2000
  • This paper proposes a new concept of coordinating green this which controls 10 traffic intersection systems. For instance, if we have a baseballs game at 8 pm today, traffic volume toward the baseball game at 8 pm today, traffic volume toward the baseball game will be incr eased 1 hour or 1 hour 30 minutes before the baseball game. at that time we can not pred ict optimal green time Even though there have smart elctrosensitive traffic light system. Therefore, in this paper to improve average vehicle speed and reduce average vehicle waiting time, we created optimal green time using fuzzy rules and neural network. Computer simulation results proved reducing average vehicle waiting time proposed coordinating green time better than electro-sensitive traffic light system. Therefore, in this paper to improvevehicle speed and reduce average vehicle waiting time, we created optiual green time fuzzy rules and neural network. Computer simulation results proved reducing average vehicle waiting time which proposed coordinating green time better than electro-sensitive traffic light system dosen't consider coordinating green time.

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Analysis of Average Waiting Time and Average Turnaround Time in Web Environment (웹 환경에서의 평균 대기 시간 및 평균 반환 시간의 분석)

  • Lee, Yong-Jin
    • The KIPS Transactions:PartC
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    • v.9C no.6
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    • pp.865-874
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    • 2002
  • HTTP (HyperText Transfer Protocol) is a transfer protocol used by the World Wide Web distributed hypermedia system to retrieve the objects. Because HTTP is a connection oriented protocol, it uses TCP (Transmission control Protocol) as a transport layer. But it is known that HTTP interacts with TCP badly. it is discussed about factors affecting the performance or HTTP over TCP, the transaction time obtained by the per-transaction TCP connections for HTTP access and the TCP slow-start overheads, and the transaction time for T-TCP (Transaction TCP) which is one or methods improving the performance or HTTP over TCP. Average waiting time and average turnaround time are important parameters to satisfy QoS (Quality of Service) of end users. Formulas for calculating two parameters are derived. Such formulas can be used for the environment in which each TCP or T-TCP transaction time is same or different. Some experiments and computational experiences indicate that the proposed formulas are well acted, can be applied to the environment which the extension of bandwidth is necessary, and time characteristics of T-TCP are superior to that of TCP. Also, the load distribution method of web server based on the combination of bandwidths is discussed to reduce average waiting time and average turnaround time.

Evaluating the Levels of Port Services by the Average Waiting Cost of Ships (선박당 평균대기비용에 의한 항만의 서비스 수준 평가)

  • Park, Byung-In;Bae, Jong-Wook;Park, Sang-June
    • Journal of Korea Port Economic Association
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    • v.25 no.4
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    • pp.183-202
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    • 2009
  • This study estimates the port waiting cost of international trade ports in Korea by an opportunity cost approach. In the next step, we present a method to assess the levels of port services by the average waiting cost of ships derived from the results of the first step. Because the port waiting cost reflects the social cost, it is difficult to use as a service indicator even though it is the decision support information for a particular port facility expansion. The percentages of waiting ships and time also are insufficient indicators to reflect only the quantitative aspects by the time. However, the average waiting cost of ships in this study can be utilized as a service indicator to reflect waiting time and the loss of economic value simultaneously. It is also very useful information for a shipper and a carrier to select a port. Based on the average waiting cost of ships in 2007, it is analyzed in order of lowest service ports sequentially such as Pyeongtaek-Dangjin, Pohang, Donghae, and Samcheonpo. It is different from the sequential order of ports by the port waiting cost such as Pohang, Incheon, Gwangyang, Pyeongtak-Dangjin, and Ulsan. The port waiting cost is to a port authority as a key indicator what the average waiting cost of ships is to a port user as a useful indicator to evaluate the levels of port services.

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Optimal Traffic Information using Fuzzy Neural Network

  • Hong, You-Sik;Lee, Choul--Ki
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.3 no.1
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    • pp.105-111
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    • 2003
  • This paper is researching the storing of 40 different kinds of conditions. Such as, car speed, delay in starting time and the volume of cars in traffic. Through the use of a central nervous networking system or AI, using 10 different intersecting roads. We will improve the green traffic light. And allow more cars to easily flow through the intersections. Now days, with increasing many vehicles on restricted roads, the conventional traffic light creates prove startup-delay time and end-lag-time. The conventional traffic light loses the function of optimal cycle. And so, 30-45% of conventional traffic cycle is not matched to the present traffic cycle. In this paper proposes electro sensitive traffic light using fuzzy look up table method which will reduce the average vehicle waiting time and improve average vehicle speed. Computer simulation results prove that reducing the average vehicle waiting time which proposed considering passing vehicle length for optimal traffic cycle is better than fixed signal method which dosen't consider vehicle length.

Algorithm of Optimal Traffic Signal Cycle using Neural Network and Fuzzy Rules (신경망 및 퍼지규칙을 이용한 최적 교통신호주기 알고리즘)

  • 홍용식;박종국
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.34C no.8
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    • pp.88-100
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    • 1997
  • This paper proposes a new concept for an optimal traffic signal cycle method which will reduce the average vehicle waiting time and improve average vehicle speed. Electro sensitive traffic system can extend the traffic cycle when there ar emany vehicles in the road or it can reduce the traffic consider vehicle length, so it can cause oveflow and reduce average vechicel waiting time at the intersection, we propose on optimal traffic cycle with fuzzy ruels and neural network. Computer simulation results prove that reducing the average vehicle waiting time which proposed considering passing vehicle's length for the optimal traffic cycle better than fixe dsignal method dosen't consider vehicle length.

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Evaluating the Effectiveness of Work with the Remote System in PACS Room (PACS실에서 원격시스템을 이용한 업무의 효율성 평가)

  • Kim, Ji-Hye;Lee, Jong-Woong;Lee, Seung-Jin;Dong, Kyung-Rae
    • Korean Journal of Digital Imaging in Medicine
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    • v.13 no.4
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    • pp.171-175
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    • 2011
  • Server and Pi view management, external image and internal image Copy Import business in PACS room is through the medical assistance. Import and Copy, and in particular the number of cases is increasing the number of import is a fast growing trend. Although the increase in workload With limited human resources to increase business efficiency so Remote system is using PACS room. This remote system will want to evaluate the effectiveness of using the service. Amount of data each 437.5 MB, Copy and Import time is to compare and evaluate sees by use 1 PC. 4 PC, 4 PC+ remote system. The use of the remote system before the January 2010 to June daily average waiting time and the use of the remote system after the January 2011 to June compared to a daily average patient waiting time, evaluate. Using the remote system in January 2011 to June Find out the average remote utilization. The biggest difference on the four copy and eight continued, Were performed two times faster by use 4 PC+ remote system than use 4 PC and four times faster than use 1 PC. Before using the remote system, the daily average wait time is 14.5 minutes after using the daily average 10.2 minutes, waiting time 30% of the existing waiting time was 4.3 minutes, to reduce. Using the remote system in January 2011 to June the average daily number of cases is 107 number and The number of remote and on average 35 cases with 32% in a day remote usage. The use of the remote system to Import, CD Copy and greatly increase the efficiency of their time could be. Hours due to efficiency could also reduce customer waiting time. As a result, the manpower and the use of a remote system over time to maximize efficiency in business hours, work was evaluated by.

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An Estimation of the Average Waiting Cost of Vessels Calling Container Terminals in Northern Vietnam (북베트남 컨테이너 터미널에 기항하는 선박의 평균대기비용 추정)

  • Nguyen, Minh-Duc;Kim, Sung-june
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.25 no.1
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    • pp.27-33
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    • 2019
  • Several studies have been completed on the topic of container terminals in Northern Vietnam. Few of them, however, deal with competition in terms of costs related to vessel waiting time or cargo handling. This paper estimates the average waiting cost per TEU for all the container terminals in Northern Vietnam. After average waiting time was first estimated by applying queuing theory, uncertainty theory was applied to estimated vessel daily cost. A simulation was performed to create a series of data representing waiting cost per TEU in relation to the rate of volume handled/capacity of each terminal. Non-linear regression based on this series was used to present a function for the relationship between the average waiting cost of each terminal and the rate of volume handled /capacity.

Evaluation the external data import methods assess the effectiveness of the work (외부자료 입력방법에 따른 업무의 효율성 비교평가)

  • Shin, Seong-Hee;Lee, Seong-Jin;Jung, Jae-Eun;Lee, Jong-Woong
    • Korean Journal of Digital Imaging in Medicine
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    • v.15 no.1
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    • pp.39-45
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    • 2013
  • PACS Import external image of the thread of the tasks and duties of hospital revenue and business efficiency falls over time. 500 beds or more medical imaging import work outside of the hospital, most hospitals use a PC, KIOSK, and was used in 15 hospitals where, CD Autoloader where use was the only one. Working hours compared to CD and DVD media to test the results of the Import target PC, KIOSK, CD Autoloader Import spent less time in the order, and also the greater capacity of CD Autoloader four times the PC, KIOSK 2 times Import could be implemented quickly. In addition, the waiting time of the patients was measured using the PC's time to Import, 2011 14.5 minutes and the average patient waiting time, KIOSK and later use CD Autoloader 2012 average patient wait time of 8.25 minutes, 43% of the existing average waiting time was 5.25 minutes to reduce. However, KIOSK case of a patient in a way that directly Import latency time was soon. Import of three ways: in terms of efficiency and excellent CD Autoloader way, the patient waiting time in terms of ease of use and KIOSK was excellent. In addition, with the introduction of CD Autoloader with KIOSK Joint of the items waiting time of patients and patient satisfaction rating is considered to be a major contribution.

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Real Time Traffic Signal Plan using Neural Network

  • Choi Myeong-Bok;Hong You-Sik
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.5 no.4
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    • pp.360-366
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    • 2005
  • In the past, when there were few vehicles on the road, the T.O.D.(Time of Day) traffic signal worked very well. The T.O.D. signal operates on a preset signal cycling which cycles on the basis of the average number of average passenger cars in the memory device of an electric signal unit. Now days, with increasing many vehicles on restricted roads, the conventional traffic light creates startup-delay time and end-lag-time. The conventional traffic light loses the function of optimal cycle. And so, $30-45\%$ of conventional traffic cycle is not matched to the present traffic cycle. In this paper we proposes electro sensitive traffic light using fuzzy look up table method which will reduce the average vehicle waiting time and improve average vehicle speed. Computer simulation results prove that reducing the average vehicle waiting time which proposed considering passing vehicle length for optimal traffic cycle is better than fixed signal method which doesn't consider vehicle length.

Intelligent Traffic Light using Fuzzy Neural Network

  • Park, Myeong-Bok;You-Sik, Hong
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.3 no.1
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    • pp.66-71
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    • 2003
  • In the past, when there were few vehicles on the road, the T.O.D.(Time of Day) traffic signal worked very well. The T.O.D. signal operates on a preset signal cycling which cycles on the basis of the average number of average passenger cars in the memory device of an electric signal unit. Today, with increasing traffic and congested roads, the conventional traffic light creates startup-delay time and end lag time so that thirty to forty-five percent efficiency in traffic handling is lost, as well as adding to fuel costs. To solve this problem, this paper proposes a new concept of optimal green time algorithm, which reduces average vehicle waiting time while improving average vehicle speed using fuzzy rules and neural networks. Through computer simulation, this method has been proven to be much more efficient than fixed time interval signals. Fuzzy Neural Network will consistanly improve average waiting time, vehicle speed, and fuel consumption.