Study of algorithms of new slender ship theory of wave resistance

In this paper, Noblesse‘s New Slender-Ship Wave-Making Theory was investigated numerically. Detailed expressions of zeroth and 1st order wave resistance have been derived and calculation programs have also been compiled. In the single and double integral terms of Green function, the kernel function of wave resistance expression, special function expansion method and Chebyshev polynomials approach have been adopted respectively, which greatly simplify the calculation and increase the convergence speed.     

ELISA检测大骨节病区儿童血GSH-px活性

本文用ELISA 法测定了大骨节病区和非病区儿童全血谷胱甘肽过氧化物酶(GSH-px)活性,同时测定了该地区儿童血硒、尿硒和发硒含量。实验结果表明病区儿童血GSH-px 活性和血硒、尿硒以及发硒水平明显低于非病区儿童(P<0.01).血GSH-px 活性和血硒、尿硒以及发硒含量之间成正相关。     

谈万宜铁路万州长江大桥施工招标概算的特点

实行工程量清单编制施工招标概算，给建设单位提供施工招标前的工程造价底价，在编制过程中针对基础资料的调查取定、费率取定、工程计量同初步设计概算编制的区别与大型临时工程同施工辅助设施的划分界限对单价的影响，论述了两种不同编制方式对工程造价的影响。     

大型散货船结构节点疲劳寿命的分析计算

根据应力幅长期分布的Ｗｅｉｂｕｌｌ分布假设及结构材料疲劳的Ｓ－Ｎ曲线和线性累积损伤Ｍｉｎｅｒ准则，使用数值分析与解析相结合的混合法对３４０００ＤＷＴ大潮型散货船结构进行了分析计算，结果令人满意，证实本文介绍的方法解决船体结构在疲劳载荷作用下疲劳寿命估算的实用方法。     

船舶变频空调风机节能技术研究

应用当量温差计算法对欧—亚航线上船舶在不同航区的空调动态负荷和风机可调送风量进行了定量描述;阐述了变频技术应用于空调风机的途径;得出了空调风机变频调速,舒适性好,节能率高达５８％以上,具有广阔发展前景的结论     

Integrated model for traffic flow forecasting under rainy conditions

Inclement weather, such as heavy rain, significantly affects road traffic flow operation, which may cause severe congestion in road networks in cities. This study investigates the effect of inclement weather, such as rain events, on traffic flow and proposes an integrated model for traffic flow parameter forecasting during such events. First, an analysis of historical observation data indicates that the forecasting error of traffic flow volume has a significant linear correlation with mean precipitation, and thus, forecasting accuracy can be considerably improved by applying this linear correlation to correct forecasting values. An integrated online precipitation‐correction model was proposed for traffic flow volume forecasting based on these findings. We preprocessed precipitation data transformation and used outlier detection techniques to improve the efficiency of the model. Finally, an integrated forecasting model was designed through data fusion methods based on the four basic forecasting models and the proposed online precipitation‐correction model. Results of the model validation with the field data set show that the designed model is better than the other models in terms of overall accuracy throughout the day and under precipitation. However, the designed model is not always ideal under heavy rain conditions. Copyright © 2016 John Wiley & Sons, Ltd.     

菏泽市建设区域综合交通运输枢纽研究

通过调查、研究,分析菏泽建设成为鲁苏豫皖四省交界区区域综合交通运输枢纽的必要性、可行性,提出在山东省级层面,从国家区域经济发展的战略高度,去争取政策、畅通渠道、聚集资源的具体措施,为菏泽经济社会加快发展提供综合交通运输保障。     

法国高速铁路技术装备输出及对我国铁路提供的借鉴

在世界铁路发展先进国家中,法国是具有技术输出优势的典型国家。以高速铁路为代表的铁路先进技术和装备成为法国技术输出的重要领域。目前,我国铁路新线建设及其创新技术成果,已成为推动铁路企业向国外市场发展的巨大动力。通过研究和介绍法国推动高速铁路技术输出的做法及影响,提出对我国铁路行业及相关企业未来发展提供的有益借鉴。     

城市轨道交通小编组高密度运行的合理实施

小编组高密度作为城市轨道交通列车开行的一种、组织形式,具有运营组织灵活、节约建设费用和服务水平较高等优点.在实际运营中,由于受到一些制约条件的影响,这种运行形式还没有得到普遍采用.分析了小编组高密度运行的优点,探讨了其发展及适用条件,同时总结了制约其发展的现实因素;并基于以人为本的原则对其技术经济合理性进行分析,结合新技术的发展探讨其进一步发展的可行性.     

Google Earth在铁路勘测设计中的应用

基于Google Earth免费提供高质量全球GIS数据源的特点,我国的铁路勘测者也越来越多的参与和研究Google Earth在本领域的应用。实践证明,Google Earth以其优秀的GIS服务以及其他与之相关的交互技术、交互软件,可以在线路勘测的各个阶段为用户提供方便快捷的应用。介绍了Google Earth在铁路辅助选线、测量控制网设计、辅助测绘和线路方案演示等方面的应用情况。