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81.
Tûba Aktaran‐Kalaycı Christos Alexopoulos Nilay Tanık Argon David Goldsman James R. Wilson 《海军后勤学研究》2007,54(4):397-410
We formulate exact expressions for the expected values of selected estimators of the variance parameter (that is, the sum of covariances at all lags) of a steady‐state simulation output process. Given in terms of the autocovariance function of the process, these expressions are derived for variance estimators based on the simulation analysis methods of nonoverlapping batch means, overlapping batch means, and standardized time series. Comparing estimator performance in a first‐order autoregressive process and the M/M/1 queue‐waiting‐time process, we find that certain standardized time series estimators outperform their competitors as the sample size becomes large. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007 相似文献
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提出采用过氧化氢组液参与柴油机的燃烧,改善柴油机燃烧过程,同时降低油耗与排放的新方法。分析了过氧化氢对柴油机燃烧过程的影响机理,从实用角度设计并开发了一种过氧化氢组液供给系统,并在135柴油机单缸机上试验研究过氧化氢组液消耗量对比油耗、烟度、排温及NOx的影响。 相似文献
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See Seng Tan 《战略研究杂志》2015,38(3):332-358
AbstractThis paper critically assesses the conceptual utility of smart power to Singapore’s evolving defence and foreign policy and behaviour. First, as a political concept adopted by the United States for its post-Afghanistan strategy, smart power does not travel easily. With qualifications, however, the notion is relevant to Singapore’s policy pragmatism and its emphasis on deterrence and diplomacy. Second, Singapore’s willingness to employ its military assets in disaster relief and peacekeeping arguably hews most closely to smart power’s mix of hard and soft approaches. Third, Singapore’s contributions to global governance, albeit limited, imply a rethinking among its leaders on the place of values in its policy. 相似文献