基于最大相似度的潜艇战场态势评估

根据领域知识,利用欧式距离的基本理论方法,将待评估的战场态势的态势要素的特征分量与已知态势模式特征分量的标准值进行匹配,再根据层次分析的相关思想获取各属性分量的权重,两者结合即得待评估战场态势与已知态势模式的相似度,相似度最大者即为潜艇战场态势评估的结果。最后,通过举例计算验证了该方法在潜艇战场态势评估中的可行性和实用性。     

风险优属度模型在舰船研制中的应用

引入广义梯形模糊数描述风险等级,增加了评价者的置信度指标.提出由顶点间距和重心间距相结合的综合贴近度概念,合理解决了模糊语言与模糊数的匹配关系.利用乐观指标把风险和风险报酬结合起来,建立基于双理想点的风险优属度模型,克服了传统风险度量模型只考虑风险而不考虑风险报酬的弊端.对几个舰船装备研制方案进行风险分析,MALTLAB仿真计算结果表明,风险优属度模型直接反映出了决策者自身的风险偏好程度,更加符合实际决策过程.     

舰艇编队反导作战模式下的静态网络建模与应用

为研究不同舰艇编队不同作战样式反导的整体性能,针对舰艇编队反导的现有和将来可能发展的作战模式,对参与反导的节点进行抽象,采用复杂网络方法建立静态网络模型,运用该模型进行假定条件下的作战,并运用复杂网络的相关度量参数对舰艇编队反导的静态模型进行对比分析。结果显示,运用复杂网络理论对舰艇编队反导静态建模定性分析的可行性,且模型能对舰艇编队反导的网络性能进行度量,为利用复杂网络更加深入的研究反导静态模型和动态模型打好基础,也为更加深入地研究舰艇编队的反导作战提供帮助。     

地基承载力问题中的破坏模式与度量标准

针对工程的实际情况,研究重力式结构地基可能的破坏模式,建立合理的地基承载力计算模式。通过对地基承载力研究中的破坏模式、设计荷载的作用面宽度、地基承载力稳定性度量标准等问题的讨论,认为:重力式码头是单向破坏模式,且需同时考虑整体破坏与局部破坏;直立式防波堤应是双向破坏模式,同样需考虑整体破坏与局部破坏。目前的对基床底面实际受压宽度的确定往往会导致地基承载力计算值的偏大。地基承载力问题用整体破坏模式的单一抗力分项系数,只能度量整体破坏,不能反映地基土可能发生的局部破坏;且不能准确反映地基土强度指标的不确定性,应采用强度分项系数与荷载分项系数来共同度量地基的承载能力。     

“引航家”国产智慧船舶交通管理系统——MIS与VTS的一体化操作

正"引航家"国产智慧VTS系统创新性提出MIS与VTS的一体化操作理念,有效解决了目前VTS与MIS无法实现有效的信息交互和数据共享的问题,实现了"监"与"管"的有机统一,有效提高了VTS系统用户工作效率并提升了用户体验。本文详细地描述了MIS与VTS的一体化操作的操作模式,难点问题(多数据源数据融合及大批量船舶情况下交互效率)及解决方案。在船舶交通领域,海事用户对目前采用C/S架构的     

基于MBSE的船型与水动力性能研究设计模式探讨

新兴技术与系统工程技术的快速发展,给船舶设计模式的变革带来了新的机遇。本文分析了当前船型与性能设计模式及其存在的局限性,同时简要介绍了基于模型的系统工程的基本原理和特征。在此基础上,针对当前船型与水动力性能设计过程中依赖经验缺乏创新能力、知识转化与重用程度不高、性能综合优化能力不足等问题,提出了模型驱动的船型与水动力性能设计模式的基本架构,给出了需要突破的关键技术,可为后续开展MBSE在船舶设计领域的应用实践提供一些参考。     

餐饮营业数据库中关联模式的卡方分析

系统分析了餐饮企业数据的特点,基于关联规则和卡方分析理论,建立了餐饮营业数据库中关联模式的卡方分析模型.以某餐饮企业70万条原始数据为例,利用数据挖掘技术生成关联规则,将统计学中的列联表卡方分析引入到关联模式的相关性度量,通过卡方分析方法检验Apriori算法生成的规则,对规则前件与后件之间的相关性进行度量,开展对关联模式卡方检验的实证分析,从统计意义上分析规则是否关联及有效,剔除无用规则或误导规则.结果表明:列联表卡方分析适用于具有分类特征的样本间差异性的检验,在支持度度量的基础上引入卡方检验能有效地对非相关模式进行删减,减小频繁项集和关联规则的规模.     

做好档案数字化工作的几点建议

档案数字化是将档案转变为可以度量的数据,再以这些数据建立起电子信息库,用户通过网络可方便查询,以获取信息.     

基于OLAP的数据仓库模型的探讨

随着跨领域产业的出现和各领域知识的互相渗透,企业决策所需要的数据量越来越庞大。一个企业的数据仓库包含了该企业运作的所有历史数据,有效地构建和使用数据仓库为企业人做出决策提供更优越的平台。本文提出基于OLAP的数据仓库的设计方案,并对雪花模式和星型模式的优缺点进行详细论述。     

基于知识图谱的防洪预案管理系统研究与应用

水利行业的传统防洪预案内容具体全面,但编制设计主观性较大,文本冗长,在使用过程中防汛人员往往难以快速、直观的表述和理解,不能满足快速精准决策的要求。利用OCR、NLP、机器学习等先进信息化技术,构建防洪知识图谱,基于知识图谱实现预案的智能问答功能,并且结合用户需求,通过开发防洪预案知识服务系统,可有效提升防洪领域信息检索的速度与精确度,可以有效提高各级水行政主管部门的预案执行效率。     

An experimental study on the dynamic response of a hull girder subjected to near field underwater explosion

An experiment of hull girder model subjected to near field underwater explosion at midship is implemented. High-speed photography is applied to achieve the time history of hog displacement of the hull girder model subjected to shock wave of undex. The determination method of hog distortion using these show-motion pictures is presented. The experiment also achieves the local plate distortion of the hull girder model. Based on these works, the damage mechanism and mode of hull girder subjected to near field undex at midship are discovered. Finally, the coupling effect between whole motion of hull girder and distortion of local structure is discussed.     

基于设计模式的内容管理系统"多站点发布"设计

设计模式对当代的面向对象程序设计技术做出了巨大的贡献，为开发人员带来了福音。通过设计模式，程序的结构比以往更为有效。在内容管理系统“多站点发布”的设计中通过引入设计模式并对模式进行组合和简单实现不仅提高了系统设计的可重用性也避免了过分的设计，最终达到了设计与解决问题之间的最佳平衡。     

两次气旋影响风暴潮过程的天气学特征分析

滨海新区风暴潮灾害日益频繁,在统计历史风暴潮及强增水个例的过程中发现了一些规律。主要结论:两次过程在发生风暴潮最高潮位之前的一个天文低潮位时增水出现激增的现象。两次过程高空形势都是一槽两脊。地面形势为江淮地区锋生形成闭合气旋。两次过程气旋移动路径非常相似,均由江苏境内北上,沿山东沿海向东北登陆朝鲜半岛。两次过程增水的激增也都与气旋北移有密切关系。塘沽站与成山头站海平面气压差与增水有较好的相关性。     

基于变长系统调用序列模式的入侵检测方法研究

提出了一种变长序列模式的寻找算法,从训练序列中找出一组基本相对独立的变长序列模式,并在模式集的更新过程中自动定义了模式间的前后次序关系,以此构建了一个描述进程执行模式的DFA。针对已有基于变长序列模式的模式匹配算法需要向前预测若干个系统调用号的缺点,设计了一个更好的模式匹配算法。实验结果表明,算法在模式寻找过程中是稳定的,并在保持小规模模式集的情况下,取得了很低的误报率和漏报率。     

Coupled transport-reaction pathways and distribution patterns between siliciclastic-carbonate sediments at the Ria de Vigo

This paper examines the linkages between the space-distribution of grain sizes and the relative percentage of the amount of mineral species that result from the mixing process of siliciclastic and carbonate sediments at the Ria de Vigo (NW of Spain).The space-distribution of minerals was initially determined, starting from a detailed mineralogical study based on XRD-Rietveld analysis of the superficial sediments. Correlations between the maps obtained for grain sizes, average fractions of either siliciclastic or carbonates, as well as for individual-minerals, were further stabilised. From this analysis, spatially organized patterns were found between carbonates and several minerals involved in the siliciclastic fraction. In particular, a coupled behaviour is observed between plagioclases and carbonates, in terms of their relative percentage amounts and the grain size distribution.In order to explain these results a conceptual model is proposed, based on the interplay between chemical processes at the seawater–sediment interface and hydrodynamical factors. This model suggests the existence of chemical control mechanisms that, by selective processes of dissolution-crystallization, constrain the mixed environment's long-term evolution, inducing the formation of self-organized sedimentary patterns.     

被撞受损码头的调查与检测

通过对被撞受损码头的详细调查与检测,发现码头混凝土构件多处严重受损,直接影响码头结构的安全性,对此提出相应的修复建议。同时,能为码头的修复设计提供依据与参考。     

Benthic foraminifera in the surface sediments of the Beaufort Shelf and slope, Beaufort Sea, Canada: Applications and implications for past sea-ice conditions

This paper presents new data on distribution patterns of modern benthic foraminifera and other microfossils from the Canadian Arctic, specifically the Beaufort Shelf and slope. The material was collected in June to August of 2004 and is the first of its kind in this area to be collected since 1970. We examined the smaller sizes (45–63µm) as well as > 63µm and discovered that many species had been severely underrepresented in previous studies. Deep sea forms, that had been overlooked previously, were common on the shelf; two species (Elphidiella arctica and Ammotium cassis) appeared in preliminary results to be indicators of methane seepage; and it was possible to make determinations of sea-ice coverage using a combination of foraminifera and tintinnids (planktic ciliates). Our data indicated the presence of many of the same species as previous studies from this area, but improved techniques of sample processing greatly increased the number of specimens and species found (particularly the small deep sea arctic species Buliminella hensoni and Bolivina arctica) which provide much more reliable data for paleoceanographic determinations. One of the primary objectives for this work was to provide baseline data to help determine paleo-ice cover; these data cover a broad range of conditions on the Beaufort Shelf that make it possible to achieve this objective as well as improving what it is known about the assemblages on this shelf as compared to other arctic shelf areas, such as the Siberian Shelf).     

港口企业多元化经营绩效研究

主要分析了不同规模的港口企业实施多元化战略对企业自身的影响,介绍了样本的选择及定量,相关性分析及研究结论。通过定量分析发现港口企业多元化经营对其绩效产生的潜在的影响。     

Exploring relationships between recruitment of European hake (Merluccius merluccius L. 1758) and environmental factors in the Ligurian Sea and the Strait of Sicily (Central Mediterranean)

This paper explores the relationships between the spatial patterns of the distribution of the young hakes of the year (YOY) and the oceanographical features in two areas of the Central Mediterranean (the Ligurian Sea and the Strait of Sicily), characterised by the occurrence of straits and channels. Comparative and correlative approaches were used to investigate coupling between biological and physical patterns. Density indices of the YOY were derived from annual trawl surveys from 1994 to 2004 in spring and autumn. Mean patterns of the YOY distributions were compared with the mesoscale oceanographical features reported in literature. No evident trends in recruitment strength were found in either areas. Inter-annual variability in YOY abundance in the Ligurian Sea was higher than in the Strait of Sicily. The location of nursery grounds in the study areas coincides with zones of relatively higher production, where upwelling and other enrichment processes regularly occur. The presence of predictable eddies and the frontal systems play a major role in the localization of nursery areas in the Strait of Sicily, maintaining their stable position throughout the years. The strongest transport of southern waters from the Tyrrhenian to the Ligurian Sea, due to the East Corsica Current, which is negatively correlated to winter North Atlantic Oscillation, is associated with the highest abundance of hake recruits in the nurseries of the Northern Ligurian Sea.     

浅谈船舶配员不足的原因及防治措施

文章通过温岭地区航运情况调查,发现船舶配员严重不足,阐述其原因和危害,提出防治措施。