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《Journal of Great Lakes research》2022,48(3):659-668
Previous studies reported coastal trapped waves (CTWs) in the Caspian Sea (CS). This study deals with the generation mechanisms, the temporal and spatial variability of CTWs in this area, and their transformations during propagation from the origin to the destination using recent measurements and high-resolution numerical simulations. CTWs are observed at all stations with periods of 2–6 days after northerly storms. The Absheron Peninsula, old Sefidrud delta, and Nur coasts were identified as the CTWs prone regions. The generation of CTWs in these locations was confirmed using numerical experiments. The propagation away from the generating location of CTWs was analyzed using a representative real wind storm. In the west part of the CS, the generation mechanism of CTWs is mainly similar to the barotropic Kelvin waves; in contrast, it is similar to the continental shelf waves in the southern shelves. The results can be used to study the contribution of generated CTWs to the transport of sediment and biological materials in all large lakes. 相似文献
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针对鉴定试验花费大、周期长的问题,提出一种水下无人航行器导航误差小子样贝叶斯试验CEP评定方法。该方法综合运用大量验前子样,对其进行相容性检验,以确定有效的验前子样,并运用统计推断理论获取验前信息。根据在验收试验中获取的验后子样获取验后信息,利用贝叶斯理论推出无人航行器满足CEP指标的概率。实例结果表明了方法的有效性和实用性。 相似文献
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为科学、准确、客观地评定精确空投着陆精度,提出精确空投着陆精度的评定方法。借鉴圆概率误差(circular
error probable,CEP)的评定方法,通过对空投试验的误差分析,获取着陆点的误差数据,剔除异常数据。对试验样
本进行正态性检测以及相关性检测后,采用相应的数学统计方法计算 CEP。结果表明,该方法能为评定精确空投系
统的性能提供数据支撑。 相似文献
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从通信行业未来以LTE、集团客户为主的业务网发展趋势出发,梳理省干建设PTN网络的必要性及要点,并分析讨论省干PTN系统建设的关键技术、网络建设模型及组网要点,拓展了不同场景下省干PTN系统部署长期演进组网架构的研究视角,为大数据时代省干PTN传输网部署提供了参考,有助于推动省干PTN网络建设。 相似文献
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针对目前使用的多头分导式子弹头圆概率误差估算方法比较粗略的缺点,对多头分导式子弹头飞行特点进行了分析,并按照分析结果,提出了一种新的CEP估算方法.根据一种多头分导方案实例,利用这种新的方法进行了子弹头圆概率误差的计算和验证,通过不同方法的对比,证实新的估算方法简单、可靠,结论符合误差分配规律.可以为多头分导方案的设计和判断提供更为精确的依据. 相似文献
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分组交换网(PSN)是电信网络发展的方向,主要承载IP业务;但IP业务没有为网络营运者带来好的回报,PSN还要与现有巨大的非IP网络设备后向地兼容;边缘到边缘的伪线仿真(PWE3)是在PSN上能提供传统L1和L2层网络业务的机制;PWE3的发展有可能形成统一的多业务网络平台。本文介绍PWE3框架结构、仿真的FR、Ethemet、ATM、TDM专线业务,以及向统一多业务PSN发展的趋势。 相似文献
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Pd–Cu composite membranes on microporous stainless steel (MPSS) substrate were fabricated using surfactant induced electroless plating (SIEP). In the SIEP method, dodecyl trimethyl ammonium bromide (DTAB), a cationic surfactant, was used in Pd- and Cu-baths for the sequential deposition of metals on MPSS substrates. The SIEP Pd–Cu membrane performance was compared with membranes fabricated by conventional electroless plating (CEP). The pre- and post-annealing characterizations of these membranes were carried out by SEM, XRD, EDX and AFM studies. The SEM images showed a significant improvement of the membrane surface morphology, in terms of metal grain structures and grain agglomeration compared to the CEP membranes. The SEM images and helium gas-tightness studies indicated that dense and thinner films of Pd–Cu can be produced with shorter deposition time using SIEP method. From XRD, cross-sectional SEM and EDS studies, alloying of Pd–Cu was confirmed at an annealing temperature of 773 K under hydrogen environment. These membranes were also studied for H2 perm-selectivity as a function of temperature and feed pressure. SIEP membranes had significantly higher H2 perm-selectivity compared to CEP membranes. Under thermal cycling (573 K – 873 K – 573 K), the SIEP Pd–Cu membrane was stable and retained hydrogen permeation characteristics for over three months of operation. 相似文献
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欧志芳 《网络安全技术与应用》2014,(12):72-72
面对复杂多变的需求,需要我们梳理出业务的本质,并设计一套与之相适应、易扩展的框架结构,让业务组件化,组件服务化,通过灵活的服务组装,来满足灵活多样的业务需求。本文旨在通过对中国电信CEP协议的剖析,指引如何通过对整个CEP层次结构进行归纳总结,体系化实现服务能力的封装与开放。 相似文献