共查询到20条相似文献,搜索用时 234 毫秒
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针对航空兵信息进攻的特点,在分析了航空兵信息进攻中的位置优势、辐射源优势以及自身信息作战能力优势的基础上,尝试建立了航空兵进攻性信息对抗优势函数;并利用改进的矩阵法对目标进行分配.结果表明所研究内容使航空兵信息进攻目标分配更加合理,同时也是对信息作战理论的一种完善. 相似文献
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航空反潜网络化体系信息域效能研究 总被引:1,自引:0,他引:1
为评估航空反潜网络化体系信息域对作战效果的影响,首先分析了网络化体系信息域的信息质量转换过程,提出了完整性、准确性和时效性3个信息质量指标;然后分别对网络化体系信息域的传感器子域、融合子域和通信网络子域的完整性、准确性和时效性指标进行了分析,并对这3个评估指标进行了度量;最后给出了航空反潜网络化体系的信息域效能评估模型. 相似文献
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简要介绍了PSPC标准的基本概况和实施要求,以及实施后对建造和设计产生的影响。以57000DWT散货船为例,简要阐述了舾装生产设计针对油漆保护所采取的应对措施。以图例的方式介绍了各压载水舱内舾装件的布置情况和特点以及现场的建造方法和施工流程。重点讨论了设计过程中的注意要点和现场施工过程中的难点.并提出了有待解决的问题,为以后的生产设计提供了参考。 相似文献
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This article examines noncavitating and cavitating flow fields around a semi-spade rudder in the ship wake and propeller slipstream
based on a computational method. The article seeks to explain the erosion that can occur around the gap due to cavitation;
such erosion has been reported to occur while a ship is at sea. Another area of research is the effect of the gap size and
shape. The effects of erosion-evading devices such as elongated gap edges, an increased edge radius, flow control projections,
and vertical and horizontal guide plates were also studied. 相似文献
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Zhi Heng 《Maritime Policy and Management》2018,45(1):125-139
This article discusses the proposed Kra Canal and its impacts on the tanker market from an economic perspective. We forecast tanker size distributions and further analyze the impacts of toll structures on tanker traffic. The forecast for tanker size distributions is based on distance savings for tankers as potential users of the Kra Canal. The database covers 105 busiest oil transport routes through the Strait of Malacca for the three-year period 2013–2015. Forecasts for individual routes are achieved using an autoregressive model. Two toll polices, namely the willingness-to-pay policy and the differential-pricing policy, are analyzed in order to maximize the annual toll income of the Kra Canal. The findings for the proposed Kra Canal will attract large vessels from the Strait of Malacca. An interesting finding is that the Kra Canal becomes more profitable during an unfavorable tanker market situation when the time-charter rate is low and fuel price is high. The article concludes with a policy that satisfies the goals of canal operator and government. 相似文献
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针对舵装置的传统设计方法在保证可靠性上存在的问题,提出对舵装置可靠性设计的重要性.通过对舵装置的可靠性分析,以舵杆为例详细介绍了与传统设计相结合的可靠性设计方法. 相似文献
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本文简单介绍了燃气发生器的作用,重点讲述了一种燃气发生剂试验,总结出该型燃气发生剂燃烧速度与配方的关系,并从燃烧机理进行了解释。 相似文献
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Cruise traffic is a maritime business and tourist typology that has expanded significantly in the past two decades. The seasonality of the industry affects maritime traffic, generating negative effects for the primary stakeholders involved in the configuration of a cruise itinerary. This article focuses on cruise traffic seasonality from the perspective of cruise ports by analysing a sample of 13 ports on the Spanish Mediterranean coast. The variable used was cruise passenger movements during the period 2000–2015. The main objective of this article is to analyse cruise traffic seasonality in order to identify a pattern, classify through a cluster analysis, and identify the changes in seasonality during the period. Specifically, a threefold analysis has been performed, with the additional goal of providing a series of counter-seasonal suggestions and strategies to apply in the management of cruise ports. First, the seasonality pattern of each port was determined. Second, a cluster analysis was conducted to classify ports into clusters with homogeneous seasonality patterns. Third, an analysis was conducted to identify the changes in seasonality during the period of analysis using the coefficient of variation and the Gini coefficient. This article concludes the existence of two port clusters with different seasonal patterns. 相似文献
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Shoji Takechi Kazuhiro Aoyama Toshiharu Nomoto 《Journal of Marine Science and Technology》1998,3(4):194-200
Accuracy management concerns various aspects of all assembly industries, e.g., final product quality, manufacturing efficiency,
and manufacturing costs. In the near future, accuracy management will be even more important in manufacturing systems because
of mechanization and automation. This paper considers the concept of computer-aided accuracy management systems, which are
based on the concept of integrated manufacturing systems. We propose two management systems, accuracy planning and accuracy
estimation, and concentrate on accuracy planning. A model of welding deformations and an easy estimation method for such deformations
by computer analysis using the finite element method (FEM) are described. A prototype system based on the accuracy management
concept was implemented in the authors' integrated manufacturing systems, and some examples of estimating welding deformations
are given here.
Translation of an article that appeared in the Journal of The Society of Naval Architects of Japan, vol. 181 (1997): The original
article won the SNAJ prize, which is awarded annually to the best papers selected from the SNAJ Journal, JMST, or other quality
journals in the field of naval architecture and ocean engineering. 相似文献