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Based on the passive spectroscopy,the D_α atomic emission spectra in the boundary region of the plasma have been measured by a high resolution optical spectroscopic multichannel analysis(OSMA) system in EAST tokamak.The Zeeman splitting of the D_α spectral lines has been observed.A fitting procedure by using a nonlinear least squares method was applied to fit and analyze all polarization π and ±σ components of the D_α atomic spectra to acquire the information of the local plasma.The spectral line shape was investigated according to emission spectra from different regions(e.g.,low-field side and high-field side) along the viewing chords.Each polarization component was fitted and classified into three energy categories(the cold,warm,and hot components) based on different atomic production processes,in consistent with the transition energy distribution by calculating the gradient of the D_α spectral profile.The emission position,magnetic field intensity,and flow velocity of a deuterium atom were also discussed in the context. 相似文献
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本文讨论在实行修后逐出规则下服务台可修的离散时间Geometric/G/1系统和忙期第一顾客受特殊接待的单重休假系统,给出了两系统的各种稳态指标,针对第一个系统,给出了部分可靠性指标。 相似文献
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服务台可修的Geometric/G/1离散时间排队 总被引:6,自引:1,他引:5
侯玉梅 《数学的实践与认识》1996,(4)
本文讨论服务台可修的离散时间Geometric/G/1排队,平行于连续时间可修M/G/1模型,给出了系统的各种稳态指标. 相似文献
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普遍认为零售企业压榨供应商、但实际上供应商利润率远高于零售商是业界关注的一个热点商业悖论问题。通过构建无退货、一般退货、全额退货、线性回扣等体现零售商不同强势地位的供应链渠道管理模型,研究并比较了退货和回扣等强势契约机制以及销售努力对零售供应链管理绩效的影响。分析表明供应商通过批发价定价可以有效转移强势契约带来的风险和成本支付,零售商不能通过强势契约显著提升零售供应链效益。零售商应该利用渠道优势首先强化对批发价定价权的影响,在此基础上合理采用强势契约机制。本文研究很好地解释了零供双方渠道地位与利润水平矛盾的商业悖论问题。 相似文献
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This article analyzes a continuous-review inventory system with random supply interruptions and random lead time which may be interrupted by a random number of supplier’s OFF periods. The inventory with constant demand rate is managed by a (r; q1, q2, ··· , qm) policy and supplies from an unreliable sole supplier. By renewal theory and matrix Geometric method, the long-run average cost function is obtained and some important properties of the function are proved. Furthermore, performance of the inventory is derived. 相似文献
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病床是医院的关键医疗资源,其管理水平关系到医疗资源能否合理配置.因此,如何优化病床资源并高效利用医院病床资源是一个具有挑战性的课题.对国内外学者在病床资源优化利用方面的研究进行梳理和评价,分析目前病床资源调度的研究动态以及发展前景,从而提出四点病床资源优化的研究展望.这不仅为国内外学者在未来病床资源调度的研究方向上提供指导性建议,而且对我国医院管理者合理、有效地利用现有病床资源具有重要的现实意义. 相似文献
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