排序方式： 共有23条查询结果，搜索用时 0 毫秒
21.
文章从多主体的动态事务管理逻辑出发,给出了多主体动态管理逻辑的语言和语义,并进一步分析了质询的时态协议,给出了其模型。最后从称珍珠的例子出发,分析了一个Q生成模型的语义和模型,并得出了一些结论。 相似文献
22.
Due to numerous uncertainties such as bad weather conditions, frequent changes in the schedules of vessels, breakdowns of equipment, port managers are aiming at providing adaptive and flexible strategic planning of their facilities, especially intermodal terminals. In this research, we investigate a two-stage optimization of intermodal terminals main parameters via using AnyLogic simulation platform. We have developed a set of hybrid simulation models to optimize the main parameters of intermodal terminals which are also called dry ports. To make an express evaluation of the preliminary implementation of dry ports, we have developed an agent-based system dynamics simulation model to achieve the stable state of the main parameters of intermodal terminals. To clarify the obtained averaged benefits of the main dry ports parameters while the port managers make key decisions on the investments into implementation of intermodal terminals, we have developed an agent-based discrete-event simulation model of a seaport – a dry port system. We show that the combination of the agent-based modeling with other simulation approaches simplifies the process of designing simulation models and increases their visibility. The developed set of models allows us to compute the balanced values of the parameters, while an effective operation of a seaport – intermodal terminal system is achieved. On the basis of the provided case study on one of the busiest ports in China, we prove the adequacy and validity of the developed simulation models. Due to the lack of systematic approach to optimization of the main parameters of intermodal terminals in logistic industry, our findings set herein could improve the decision-making process related to the selection of strategic facility planning in the field of intermodal terminals. 相似文献
23.
通过文献研究、实证研究和规范分析方法,旨在提出社区教育多元主体办学的法制完善建议。通过研究发现,当前多元主体参与社区教育办学的趋势初显,参与社区教育的多元主体数量和类型日益增多,参与形式途径趋于多样。现行社区教育多元主体办学存在多元主体参与主动性和持续性不足、协同性弱、社会参与制度保障缺失的问题,亟须加强规范设计和制度供给,为各类主体更好地参与社区教育提供法律支撑。研究结论:社区教育多元主体办学的法制完善可以从明确社区教育多元主体办学的价值取向、细化社区教育多元主体办学相关配套制度两个方面着手。 相似文献