双曲拱桥上部结构的维修加固法

根据双曲拱桥上部结构特点可能引起的4种病害,并提出了相应的维修、加固的方法。     

海洋运输环境影响下谷物货舱的自然通风

根据影响谷物货舱的外部因素的不同,将货舱进行分区,利用传热学知识求得易受外界影响的区域,同时根据谷物货船的温度和湿度分布特点,提出有针对性的谷物货舱通风原则,并给出关于谷物货舱通风的相关建议.     

有效落实新颁《船员培训管理规则》师资规范探析

对新颁《船员培训管理规则》师资规范要点进行释义。基于多项调研，分析我国航海师资现状与国家教育行政部门及海事局新颁规则的差距，提出从数量、质量和管理三方面着手，缩小差距的建议，介绍具有推广价值的典型经验。     

铝镁合金半圆球工件挤压拉伸加工工艺研究

针对制作材料为5A06牌号的铝镁合金浮球,小批量生产工件,制作时分两半圆球压制拉伸,再组焊成球的工艺过程以及在以往挤压拉伸半圆球的生产过程中次品、废品高,造成施工成本较高的现象,通过理论计算和借鉴以往的加工经验,对半圆球挤压拉伸的膜具、工艺流程进行了改进。经多次试验取得了良好的效果,产品合格率达到98%以上。     

发展科学教育 培育科学文化

中国的科学教育已走过百年历程,起到了十分重要的教育作用。但总的来说,我国的科学文化还很不发达,科学教育程度不够。为了改变这一现状,我们需要从三个方面进行努力：第一,全面理解科学教育,树立正确的科学价值观;第二,培育积极完整的科学文化;第三,创造和谐、自由的科研环境。     

Hybrid Reliability Parameter Selection Method Based on Text Mining,Frequent Pattern Growth Algorithm and Fuzzy Bayesian Network

Reliability parameter selection is very important in the period of equipment project design and demonstration. In this paper, the problem in selecting the reliability parameters and their number is proposed. In order to solve this problem, the thought of text mining is used to extract the feature and curtail feature sets from text data firstly, and frequent pattern tree (FPT) of the text data is constructed to reason frequent item-set between the key factors by frequent patter growth (FPG) algorithm. Then on the basis of fuzzy Bayesian network (FBN) and sample distribution, this paper fuzzifies the key attributes, which forms associated relationship in frequent item-sets and their main parameters, eliminates the subjective influence factors and obtains condition mutual information and maximum weight directed tree among all the attribute variables. Furthermore, the hybrid model is established by reason fuzzy prior probability and contingent probability and concluding parameter learning method. Finally, the example indicates the model is believable and effective.