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161.
This paper develops a mathematical model for the optimal stopping design of limited-stop bus service, which allows each bus vehicle to skip some stops. To better reflect the reality, this paper considers the vehicle capacity and stochastic travel time. Also, vehicles are all allowed to skip stops whereas any stop is not allowed to be skipped by two consecutive vehicles. A hybrid artificial bee colony (ABC) and Monte Carlo method is developed to solve the optimal stopping strategy. Finally, the model and solution method are validated by a numerical example, and a sensitivity analysis is performed on the passenger demand. 相似文献
162.
Jongsu Lee Jae Young Choi Youngsang Cho 《International Journal of Consumer Studies》2011,35(4):448-457
Just as standards wars over formats had characterized VCRs upon introduction to the market, the next‐generation DVD standards war between Blu‐Ray and HD‐DVD lasted 6 years before Blu‐Ray won the contest. Beginning with stated preference data drawn from a structured conjoint survey conducted before Blu‐Ray became the de facto standard of the next‐generation DVD format, we estimate consumer preferences on digital video players. A Bayesian mixed‐logit model is used and market share simulations are conducted under various scenarios based on the estimated parameters from Bayesian mixed‐logit model to surmise the future South Korean digital video‐player market. Results indicate that consumers feel that network size and title availability are more important than hardware‐related facets of the product, such as definition and storage capacity. The level of title availability and price of the Blu‐Ray player for Blu‐Ray's dominance over DVD will dramatically vary by the penetration rate of DVD players. 相似文献
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165.
After the 2004 earthquake in Japan’sNiigata Prefecture, there were many difficulties finding the victims. The earthquake caused a wired network disconnection. In addition,
fixed-phone and cell-phone service systems crashed due to the rapid increase in the volume of communications. The systems’
collapse was due to the large number of users who were worried about the safety of their relatives. The same situation happened
during Hurricane Katrina in the USA. Reflecting on these situations, the Japanese Ministry of Internal Affairs and Communications
is trying to adopt several methods to correct these communications problems. Although these methods have not been disclosed
precisely yet, we think that a predominant goal of one of the methods is most likely to find victims using RFIDs (Radio Frequency
Identification) with computer sensors. To do this, the RFID method would have to be incorporated in the following ways: 1)
by scattering sensor devices from helicopters when a large-scale disaster such as an earthquake occurs, 2) by making RFIDs
self-organized into a network, and 3) by making the self-organized network pinpoint the position of victims. A certain amount
of field-testing may be necessary to confirm the effects of this plan. However, such testing requires a great amount of time
and high costs. Therefore, we adopt an agent-based simulation for such a test. In this paper, we pay specific attention to
a simple and assured algorithm for discovering victims using RFIDs. First, we explain our method to confirm the location of
victims. Second, we explain our method for pinpointing the position of victims using trilateration. Finally, we present our
simulation results. 相似文献
166.
国际贸易应用型人才培养问题探讨 总被引:2,自引:0,他引:2
地方应用型本科院校如何针对自身实际,突出专业特色,培养应用型人才,是目前有关方面人士着力探讨的问题。文中从国际贸易人才培养的角度,提出以"模拟实验"、"外贸单证实务操作"、"校企互动"等为特色的专业规划,成为应用型人才培养过程中的重要环节和现实手段的观点,以此带动整体专业建设水平的提高。 相似文献
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Paul F. Hanley Author Vitae 《Socio》2007,41(2):163-179
This article studies the relationship between school district size and bus transportation costs, and estimates the change in such costs when a statewide policy of consolidation is pursued. To explore this relationship, we develop a multiple-objective model and solution procedure that combines a geographic aggregation and bus routing heuristic to generate consolidation scenarios. The heuristic was developed to explicitly consider efficiency, effectiveness, and equity objectives, and can be applied in both urban and rural states. The scenarios will generate average statewide bus transportation costs. As applied to the State of Iowa, within the legislature's proposed range of consolidation of 500-1000 students, it was found that transportation operational and capital cost increases range from 0.6 to 10.6 percent and 0.7 to 7.7 percent, respectively. 相似文献
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170.
ERP沙盘实训课程的教学研究 总被引:3,自引:0,他引:3
EPR沙盘实训课程采用体验式教学方式,可以调动学生学习的积极性与主动性,有利于高职人才培养目标的实现,是一种值得推广的实践教学模式。本文在分析该课程教学特点的基础上,提出该课程进行大众化教学的方案,并对相关的几个问题进行了探讨。 相似文献