苏州河桥梁规划研究

在分析苏州河桥现状布局及交通运行的基础上,结合发展趋势及交通需求,提出新增桥梁,并根据城市发展、接线道路等级、桥梁本体功能,提出桥梁功能结构划分。     

1885-1945年缅甸闽籍华侨的社会结构

早期缅甸闽侨以年轻男子居多,由于华侨社会内部性别比失衡,他们大多与当地人通婚.1885年后缅甸全境沦为英国殖民地,仰曼铁路向北延伸,缅甸闽侨的地域结构特征逐渐由"二元"转为"一体".同期,缅甸闽侨大多经商为生,并创立了各类社团组织.1930年后英属缅甸社会动荡不安,但远离当地政治的闽侨所受影响较小.第一代闽侨总体文化水平不高,但大多以自身中华文化特征为荣.     

某重型钢水罐车车架结构的有限元分析及优化

以某车架为研究对象,采用参数化有限元分析方法,进行了弯曲工况下应力和应变的计算。通过电测量验证了有限元模型的正确性,进而以车架的体积为目标,对车架进行了参数化模型的结构优化,得到了满足结构强度的最佳方案。     

舰船动力系统模块化建模方法

在舰船动力系统仿真平台的研究中,建立的系统模型应能够满足实时仿真的要求,同时具有通用性,以提高仿真模型的重复利用率。以某型舰船动力系统为例,研究模块的分类、模块的分解处理等模块化建模方法,建立其模型库并进行仿真验证。该方法克服了传统建模法得到的模型可移植性与独立性较差的缺点,提高了模型的可重用性。     

长波作用下与KC数相关的柔性植被对海岸结构物受力的影响(英文)

Extreme coastal events require careful prediction of wave forces.Recent tsunamis have resulted in extensive damage of coastal structures.Such scenarios are the result of the action of long waves on structures.In this paper,the efficiency of vegetation as a buffer system in attenuating the incident ocean waves was studied through a well controlled experimental program.The study focused on the measurement of forces resulting from cnoidal waves on a model building mounted over a slope in the presence and absence of vegetation.The vegetative parameters,along with the width of the green belt,its position from the reference line,the diameter of the individual stems as well as the spacing between them,and their rigidity are varied so as to obtain a holistic view of the wave-vegetation interaction problem.The effect of vegetation on variations of dimensional forces with a Keulegan-Carpenter number(KC) was discussed in this paper.It has been shown that when vegetal patches are present in front of structure,the forces could be limited to within F*￡1,by a percentile of 92%,90%,55%,and 96%,respectively for gap ratios of 0.0,0.5,1.0,and 1.5.The force is at its maximum for the gap ratio of 1.0 and beyond which the forces start to diminish.     

台州港临海港区规划波浪潮流泥沙数学模型研究

文章研究了台州港临海港区规划围垦后的有关潮流泥沙问题。首先对该海区的自然条件进行了分析,而后使用二维波浪潮流泥沙数学模型研究手段对台州港规划围垦后的二维潮流场、泥沙场、地形冲淤变化进行了模拟研究。研究结果表明,从周围水沙环境的影响考虑,该港区规划围垦的方案是可行的。     

耙吸挖泥船疏浚施工三维动画仿真

为促进三维动画技术在疏浚行业中的广泛应用,具体介绍了三维建模、材质贴图、灯光、特效、摄影机、动画、渲染等三维动画关键技术,并以应用广泛的耙吸挖泥船的疏浚施工三维动画制作为例,详细说明了运用这些技术进行三维动画制作的具体方法和过程。     

基于自适应拓扑建模的船用电网短路计算方法

为提高舰船电力系统短路计算的效率、准确性,适应现代舰船规模日趋庞大,结构易变等复杂环境,提出一种基于自适应拓扑建模的短路计算新方法。利用船用电网辐射结构特点,对网络进行二次辐射建模,并针对此模型制定了电源等效次序算法,而后基于戴维南等效定律,将网络中的电源路径按照电源等效次序逐级合并,最后得到网络对于短路点的戴维南等效电路,从而获得短路电流。该算法可对主要异步电机反充负荷进行量化计算,并能应付多电源、多重故障、不对称故障短路等复杂情况。性能分析和算例分析表明:该算法高效、准确,并能适应多种复杂环境。     

基于模块化方法的核动力汽轮机建模

汽轮机为核动力装置二回路系统重要部件,对整个系统的特性具有重要影响.根据模块化建模思想,将汽轮机划分为通用子模块,主要包括流动阻力型模块、流动存储型模块和转子模块.建立这些通用子模块的详细数学模型,利用不同模块的组合可以开发多种类型的汽轮机,提高汽轮机建模的效率.计算结果表明,建立的汽轮机模型可以满足大工况变动要求,为...     

Managing port-related supply chain disruptions (PSCDs): a management model and empirical evidence

ABSTRACT

In the contemporary port business environment, port resilience is of paramount importance for supply chain continuity. A result of the increased integration of ports into supply chains is ports’ potential to supply chain disruptions. This paper introduces a PSCD management model that incorporates the application of risk management, business continuity management, and quality management theories with the purpose of increasing port resilience such that supply chain continuity is enhanced. To validate this model, primary data were collected from samples of port operators and port authorities and analyzed using structural equation modeling with AMOS 22.0. The results indicate that managing PSCD using the management model contributes positively to the identification of internal and external opportunities and through that to port’s resilience of internal operations. This, in turn, positively influences port’s financial health and market reputation. The management model has several managerial and academic implications as it offers meaningful insights on policy development as well as theory building.