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论文基于LabVIEW软件平台开发ARPA跟踪算法仿真系统,并对不同跟踪算法进行仿真验证与比对分析。首先,在LabVIEW平台下利用Matlab脚本节点完成了α-β滤波算法仿真平台搭建,可实现匀速、变速、变向三种运动模型下常增益算法及自适应滤波算法的仿真功能;然后,在匀速目标运动模型下对不同跟踪算法进行仿真验证,分析出各个算法的最佳使用条件。最后,在自适应滤波算法的基础上对其进行改进,并在匀变速目标运动模型和变向目标模型下仿真验证其可行性。 相似文献
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针对潜艇攻击机动目标难的问题,构造了潜艇针对机动目标的跟踪系统,建立了目标运动方程和观测方程,并将UKF算法运用于潜艇对机动目标的跟踪。仿真结果表明,此方法有效、可靠,较好地达到了跟踪机动目标的目的。 相似文献
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江雨 《舰载武器(含VCD光盘)》2010,(2):14-21
近日,中国政府对外宣布成功进行了弹道导弹中段拦截试验。从中国本土发射的拦截弹击中了先期发射的目标弹,据信拦截弹与目标碰撞的高度已经超过大气层高度,技术上已达到在外层空间用动能拦截弹进行导弹拦截试验的先进标准。由此,中国成为继美国之后世界上第二个进行导弹中段拦截试验的国家。继此前的2007年1月11日使用拦截弹成功摧毁了报废的人造卫星之后,中国仅用3年的时间就进行了导弹中段拦截的实弹试验,表明中国在反导/反卫星作战系统的研究和试验方面拥有很强的技术和综合能力。虽然本次反导试验还没有做到实战条件下拦截陌生目标的要求,但已经在技术上实现了从打卫星到打导弹的进步,中国自主建设国家导弹防御系统的努力距实战部署又前进了一大步。中国政府在导弹拦截试验后宣布该试验不针对任何国家,这与中国承诺不首先使用核武器一样都是防御性的宣示,是中国依靠导弹核武器建立有限的战略威慑和反击能力的同时,在防御核攻击的军力建设上所采取的合理有限的装备发展措施。导弹防御系统尤其是拦截弹道中段导弹目标的武器必然要进入外层空间,大气层外的武器拦截试验显然不符合太空非军事化的国际共识,但在美国政府推动导弹防御系统发展和其他国家部署的情况下,中国依靠自己的力量发展规模有限但满足实际需要的导弹防御系统,是中国保持独立自主国防政策和维护国民经济快速发展的基础保证。太空非军事化是中国和全世界爱好和平人民的共同愿望,但必须有足够的实力支持才有实现这个愿望的可能。中国古代军事家就已清楚地认识到"只有能战方能止战",不在太空军备竞赛中占据自己的地位就没有最终实现和平利用空间的可能。中国发展反导防御系统的目标是维护自身的安全,这套武器系统的存在不会对任何国家造成威胁,在实现最终目的的过程中也不需考虑其他国家或团体发出的不同声音。 相似文献
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[目的]针对无人艇协同围捕过程中逃跑目标具备智能性,现有无人艇策略难以围捕成功的问题,提出一种基于双层切换策略的多无人艇协同围捕算法。[方法]第1层围捕策略采用改进势点法,以无人艇与势点的总直线距离最小为优化目标,采用匈牙利算法为无人艇动态分配势点,并采用人工势场法实现无人艇的协同避碰;第2层围捕策略利用了阿波罗尼奥斯圆的性质,在两艘无人艇前往逃跑目标的目标点进行拦截,剩余无人艇运动方向保持与逃跑目标相同,以不断缩紧包围区域;为应对逃跑目标不同的逃跑方式,第1层围捕策略和第2层围捕策略可互相转化。[结果]仿真实验表明,该算法相较于顺序分配势点算法和极角分配势点算法,围捕时间更少或持平,证明了该算法的有效性和先进性。[结论]该多无人艇协同双层围捕算法,对具备典型智能性的逃跑目标具有围捕效果。 相似文献
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《船舶与海洋工程学报》2014,(2)
正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors. 相似文献
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《船舶与海洋工程学报》2014,(4)
正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support; 相似文献
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联合作战计划和执行系统 总被引:2,自引:1,他引:1
全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划:时间不限的精密预案计划生成作战计划、方案计划或职能计划;时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础,加速应付危机的能力。 相似文献
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In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama?
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou). 相似文献
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou). 相似文献
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Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form. 相似文献
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桥梁防撞设施物理模型试验 总被引:1,自引:0,他引:1
物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。 相似文献
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印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。 相似文献
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Gunnar Alexandersson Staffan Hultén Frode Longva 《Research in Transportation Economics》2010,29(1):212-218
Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues. 相似文献