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| 1 | 对数正态型通用备件满足率评估及需求量计算方法显示文摘针对对数正态型通用备件满足率评估及需求量计算问题,采用平均寿命和方差近似原理,将对数正态型部件的寿命近似为伽玛分布,建立了对数正态型通用备件的满足率评估模型。结合备件满足率指标约束,开展了对数正态型通用备件的需求量计算。结合算例进行仿真分析,结果表明,在寿命对数标准差较低时,本文建立的对数正态型通用件备件满足率评估模型具有较高的评估精度,能够对不同寿命分布的对数正态通用备件配置方案进行评估,备件需求量计算方法能够在备件满足率指标约束下准确给出对数正态通用件配置方案,避免过度配置。提出的模型和采用的备件需求量计算方法能够为装备保障部门开展对数正态型通用备件配置方案满足率评估与确定提供理论支撑。 | 徐立 阮旻智 李华 | 2022 | 系统工程与电子技术2022，44，4： | 1 |
| 2 | 对数正态型备件随舰配置方案评估及优化显示文摘针对舰船装备任务期间对数正态型备件随舰配置方案满足率评估及优化问题,首先采用部件寿命等效原理,将对数正态型部件消耗过程等效为伽玛冲击过程,给出了寿命等效的参数计算方法,建立了对数正态型部件随舰备件满足率模型;然后,结合备件满足率指标约束,给出了对数正态型备件配置方案优化方法,并结合算例进行了仿真分析。结果表明:所建立的模型具有较高的评估精度,能够对对数正态型备件配置方案进行评估;所提出的备件配置优化方法能够在备件满足率指标约束下,准确给出对数正态备件随舰配置方案。该研究结果能够为舰船装备保障部门开展对数正态型备件随舰配置方案评估及优化,提供一定的理论支撑和决策支持。 | 徐立 李华 | 2021 | 海军工程大学学报2021，33，4： | 0 |
| 3 | Optimal policy for controlling two-server queueing systems with jockeying显示文摘This paper studies the optimal policy for joint control of admission, routing, service, and jockeying in a queueing system consisting of two exponential servers in parallel.Jobs arrive according to a Poisson process.Upon each arrival, an admission/routing decision is made, and the accepted job is routed to one of the two servers with each being associated with a queue.After each service completion, the servers have an option of serving a job from its own queue, serving a jockeying job from another queue, or staying idle.The system performance is inclusive of the revenues from accepted jobs, the costs of holding jobs in queues, the service costs and the job jockeying costs.To maximize the total expected discounted return, we formulate a Markov decision process(MDP) model for this system.The value iteration method is employed to characterize the optimal policy as a hedging point policy.Numerical studies verify the structure of the hedging point policy which is convenient for implementing control actions in practice. | LIN Bing LIN Yuchen BHATNAGAR Rohit | 2022 | Journal of Systems Engineering and Electronics2022，33，1： | 0 |
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