利用VMware实现数据中心服务器虚拟化

针对传统服务器部署方式存在的弊端,比较分析四种主流服务器虚拟化技术,提出基于VMware V13虚拟架构软件的服务器虚拟化整体解决方案,提高异构环境下服务器的利用率,增强了系统的可靠性.     

基于云计算虚拟化技术的船舶航海信息服务平台

采用KVM虚拟化系统的内核单元,调用并驱动虚拟机、构建虚拟节点、生成虚拟网络环境,通过QEMU处理器完成虚拟机对应I/O磁盘运行,将虚拟网络提供给虚拟管理层应用,通过虚拟化技术转换舰船航海信息服务平台内的物理资源为资源池,并整合物理资源层中同类资源,将同类构资源池提供给事物管理层;通过事物管理层调控将所有的航海信息传送...     

基于VMware的虚拟化技术在海工平台中控系统中的应用

随着油气行业生产规模日益扩大,各生产环境复杂度日益提高,为满足安全生产、降低资源消耗等要求,对钻井平台作业环境的安全性及稳定性提出了更高要求。中控系统的主要功能是对生产环境的危险情况进行实时监测报警并记录报警,从而保证生产过程安全、正常运行。传统的监控系统都是用单台服务器运行单个应用程序,资源利用不充分。虚拟化技术在中控系统中的应用大大减少了系统开销,提高系统性能。本文基于一套本单位生产并已交付的海洋工程平台中控系统,介绍了基于VMware虚拟化技术在海工平台中控系统中的应用及实现,并验证了该解决方案的优势。     

船舶公共计算机平台的虚拟机优化设置

船舶公共计算机平台是一种利用公共硬件资源和设备为船舶用户搭建的共享平台,公共计算机平台的用户能够通过网络和虚拟机等媒介直接调用公共计算机平台的硬件资源,创建属于自己的虚拟计算环境.随着计算机技术和虚拟化技术的发展,船舶公共计算平台技术也获得了业内的广泛重视.本文基于云平台计算对船舶公共计算机平台的虚拟机设计、数据库冗余...     

超融合技术在广州港全自动化集装箱码头中的应用

针对自动化集装箱码头业务持续运行以及码头对计算机系统可靠性、安全、延时和可管理性要求较高的问题,论述了自动化集装箱码头服务器虚拟化平台超融合技术的应用,提出了采用软硬一体的超融合技术手段,管理和调度码头数据中心内的存储、计算和网络资源,进一步满足性能、安全、可扩展及可管理的要求。结合广州港全自动化集装箱码头项目,介绍服务器虚拟化平台的网络架构、计算资源、存储资源、平台数据备份、虚拟化软件以及硬件应用。通过应用平台技术,大大提升了港口生产系统的可用性和容灾性能。     

基于云计算技术的船舶通信网络动态负载均衡研究

为了提升动态负载均衡效果,提出基于云计算技术的船舶通信网络动态负载均衡方法。利用直觉模糊时间序列算法预测云计算船舶通信网络服务器负载,对比分析预测负载与服务器负载上下限阈值,决定服务器内虚拟机是否需要迁移,若需要迁移,则以最短迁移时间与最小迁移量为目标,建立迁移目标虚拟机集合选择模型,利用遗传算法求解该模型得到迁移目标虚拟机集合,并以最大剩余容量为选择策略选择目标服务器,动态在线迁移目标虚拟机集合至目标服务器完成船舶通信网络动态负载均衡。实验证明：该方法可实现船舶通信网络动态负载均衡;不同任务数量时,该方法的动态负载均衡效果均较优;不同虚拟机数量时,该方法可有效降低任务截止时间违背率。     

服务器虚拟化的应用

随着云计算的不断普及和应用,服务器虚拟化技术有了飞速的发展,最大限度地满足企业级数据中心的高效率、高性价比和自动化管理等要求.本文着重介绍了服务器虚拟化技术的工作原理及优缺点,并简单描述了运用服务器虚拟化技术需要考虑的问题.     

虚拟化环境下的可信计算机制应用研究

论文描述了可信计算虚拟化计算环境应用所面临的难题,提出了虚拟化环境下可信计算技术的应用结构框架,并详细介绍了可信计算虚拟化环境应用框架中相关的关键技术.     

工程认证理念下航海院校ECDIS实验室安全管理现状与措施

ECDIS实验室管理的好与坏,直接影响着航海院校能否培养出综合素质过硬、安全与环保意识好、实践性强、具有国际竞争能力的高级航海人才。文章以实验室管理现状及存在的问题为出发点,结合工程教育认证的以学生为中心、产出导向教育、持续改进的三大理念,提出了虚拟化桌面技术、智能管理系统、新模式的引入、团队合作的实验室管理措施。     

服务器虚拟化技术在高速公路机电系统的应用

为解决高速公路机电系统服务器资源利用率低,容错能力低,空闲负荷整合不足等缺点,本文将通过服务器虚拟化技术,运用服务器虚拟化软件,完成服务器虚拟化系统的应用,实现潮惠高速公路机电系统的服务器虚拟化。服务器虚拟化在高速公路机电系统的应用,很大地提高了系统的整体稳定性,提高了资源的利用率,降低了建设成本。     

虚拟化技术在五洲国际集装箱码头的应用

结合天津五洲国际集装箱码头计算机网络系统的工程实例,简要介绍服务器虚拟化技术在网络系统升级改造中的成功应用,该系统通过对数据中心服务器的整合简化服务器管理,实现系统快速备份和恢复,大大提升了系统的实用性,大幅降低了网络维护成本。     

基于虚拟化的分布式数据容灾保护

基于网络层存储虚拟化,结合(n,m)数据分散技术,提出了一种适于分散部署的多数据中心、多容灾备份中心之间的分布式数据容灾保护方案.该方案通过对容灾数据的拆分与整合来实现分布式保护,在保证容灾数据灾难恢复能力的基础上,既减少了存储空间的占用率,又增强了容灾数据的安全性.     

基于Unity3D的邮船薄板平面分段流水线作业仿真

以邮船分段建造3D可视化为仿真目的，以薄板平面分段流水线为仿真对象，基于Unity3D进行邮船薄板平面分段流水线的工位设计、环境实现和仿真实现，完成邮船薄板平面分段流水线的设备虚拟化、工艺可视化和作业自动化，可为邮船薄板生产线的实际作业提供仿真环境和技术参考。     

论现代综合物流新概念及其“虚拟化”发展趋势

现代综合物流是信息流、管理流、资金流和货物流四位一体的有机联系和协调运动的综合体系。确定现代综合物流的概念定义,研究揭示这一体系的运动规律及运作虚拟化的发展趋势将会对物流理论、物流实践乃至整个经济管理产生重大变革和深远影响,同时,引导航运承运人和物流经营人采用“虚拟”方式,通过市场合理配置社会资源,真正使信息流、管理流、资金流和货物流成为协调运动的综合体系。     

虚拟海浪海洋环境模拟方法及应用

根据海浪理论及随机海浪的模拟方法和方钟圣所著《西北太平洋波浪统计集》的波浪资料,设计并编制了虚拟海浪海洋环境模拟软件,将《西北太平洋波浪统计集》的80个区块3 600份数据表的所有数据全部录入海洋环境数据库,初步完成了虚拟海浪海洋环境模拟流程和数据库界面的设计,将海浪虚拟化.以结构强度虚拟测试为例,介绍了外载定义过程船舶航行海况的设置方法,得到了海浪谱曲线和海况的波面运动图.研究结果表明:动态海况的显示技术和海洋环境数据库的配合使用,为船舶结构强度和总体性能虚拟测试提供了良好的测试环境.     

船舶制造技术成熟度评估系统

在船舶制造中,技术成熟度的评估意识薄弱且缺少信息化手段。通过确定评估指标、设定权重,建立船舶制造技术成熟度评估系统,由系统计算成熟度的得分和等级,从总体设计、建造工艺、船厂建造资源能力、船舶研制定型后等方面进行评估。该系统可减少返工带来的时间成本、人力成本,提高船舶制造技术成熟度评估的科学性、准确性、可靠性、灵活性及效率。     

High-resolution surveys of the biogeochemistry of the New England shelfbreak front during Summer, 2002

We present the observations from a pair of field experiments at the New England shelfbreak front in June and August of 2002, each consisting of 14 cross-frontal surveys using the Lamont Pumping SeaSoar. Measurements of the front's physical, chemical, and bio-optical characteristics were made at high spatial and temporal resolution. The front, based on water-column hydrographic distributions, was found within a few km of the 200 m isobath during both cruises. We present here composite sections, based on averages of individual sections shifted in space to a common frontal location, of the cross-frontal distributions of these properties as a measure of the mean state of the front in both June and August. The observations show the familiar temperature, salinity, and density distributions of the summertime front, dominated by surface thermal heating. Nutrient and bio-optical distributions show the combined effects of water-mass exchange and biological processes. T, S, silicate, and phosphate distributions are suggestive of cross-frontal exchange of slope- and shelf waters, although transport mechanisms and pathways are not apparent. These properties, along with nitrate and optical measures of the suspended particle distributions, show vertical displacements of isopleths as the front is approached: property contours slope upwards toward the front from the shoreward side, and downwards toward the front from the seaward side. Again, actual water-movement pathways are not constrained by these suggestive patterns. Bio-optical distributions show elevated indicators of photosynthetic efficiency both seaward and shoreward of the front, but the front itself is a minimum in biomass. Accumulation of photosynthetic biomass appears to be controlled primarily by nitrate scarcity in waters within and above the pycnocline. At the base of the pycnocline, light limitation appears to be the controlling factor, although the base of the euphotic zone is deeper than the biomass maxima and the base of the pycnocline. Mechanisms explaining this phenomenon are unclear, but tenuous evidence suggests low stratification at the depth of the 1% light level may not allow phytoplankton to optimize for the low-light, high-nutrient conditions at depth. Cross-frontal differences in nutrient and bio-optical parameters, particularly in August, suggest distinct phytoplankton assemblages, and the presence of calcite-forming or nitrogen fixing groups to the community structure, especially in very shallow waters across the front and in pycnocline waters seaward of the front.     

A Review of Whale-Watching and Whaling with Applications for the Caribbean

Whale-watching is a significant and growing tourism industry worldwide. Whaling has a long history and, although largely curtailed today, still occurs in a few countries around the world and in the Caribbean. Whaling has been labeled an incompatible activity with whale-watching because, in some cases, it reduces the number of whales available for use and changes whale behavior. Moreover, in some situations, whale-watching generates greater revenue than whaling, and whaling may detrimentally affect the larger tourism industry because of negative attitudes toward whaling by whale-watchers, other tourists, and host communities. This article examines the potential impacts of whaling on the whale-watching and tourism industries, and places these impacts in the Caribbean context. In doing so, the article outlines the history and current status of whale-watching in the Caribbean, outlines other potential constraints, and highlights the need for research about the impacts and roles of these industries. In the highly competitive global tourism industry, maintaining and nurturing a country's tourism image is critically important.     

面向复杂装备AR辅助维修的混合跟踪技术研究

装备维修是生产制造、作业运转的基础,特别是在船舶、航空等领域。由于在维修过程中装备结构复杂、维修人员经验技术不足和缺少直观维修手段导致容易导致维修效率低下和操作出错。因此,通过研究基于增强现实的装备维修方案,直观交互地进行维修作业,能够有效地提升维修的质量和效率。由于装备体型较大,结构复杂,给跟踪定位带来了新的困难,针对实际的工程需求,创新性地将主流方法进行结合,提出了多Marker和ORB-SLAM混合跟踪的方法。通过二次调整多Marker定位结果的动态权值,提高局部定位维修的精度和可靠性。分析比较现有的特征点算法,选择ORB-SLAM作为方案,实现全局的定位和导航,对维修过程给以指导,并设计开发装备诱导维修系统,为大型复杂设备地维修提供了通用解决方案。     

Matching biological traits to environmental conditions in marine benthic ecosystems

The effects of variability in environmental conditions on species composition in benthic ecosystems are well established, but relatively little is known about how environmental variability relates to ecosystem functioning. Benthic invertebrate assemblages are heavily involved in the maintenance of ecological processes and investigation of the biological characteristics (traits) expressed in these assemblages can provide information about some aspects of functioning. The aim of this study was to establish and explore relationships between environmental variability and biological traits expressed in megafauna assemblages in two UK regions. Patterns of trait composition were matched to environmental conditions and subsets of variables best describing these patterns determined. The nature of the relationships were subsequently examined at two separate scales, both between and within the regions studied. Over the whole area, some traits related to size, longevity, reproduction, mobility, flexibility, feeding method, sociability and living habit were negatively correlated with salinity, sea surface temperature, annual temperature range and the level of fishing effort, and positively associated with fish taxon richness and shell content of the substratum. Between the two regions, reductions in temperature range and shell content were associated with infrequent relative occurrences of short-lived, moderately mobile, flexible, solitary, opportunistic, permanent-burrow dwelling fauna and those exhibiting reproductive strategies based on benthic development. Relationships between some traits and environmental conditions diverged within the two regions, with increases in fishing effort and shell content of the substratum being associated with low frequencies of occurrence of moderately mobile and moderately to highly flexible fauna within one region, but high frequencies in the other. These changes in trait composition have implications for ecosystem processes, with, for example, reductions in permanent-burrow dwellers within one of the regions potentially compromising the ability of the assemblages to process and store chemicals and waste products. However, the connections between environmental conditions and trait composition are complex and incorporate many factors. Experimental investigations will be necessary to determine the extent and consequences of these important relationships.