高等学校课堂教学中存在问题及对策

文章分析传统与多媒体两种教育模式的内涵及功能特点,指出高等院校课堂教学中存在问题,探讨问题解决方法,强调教师应提高两种模式的科学认识。同时也指出实际教学中应根据教学内容、教学对象、教师水平合理将两种教学模式有机结合,有效提高课堂教学效果。     

Scale of Entry and Its Effects on Trade Policies in International Oligopoly Market

On the assumption that the govermment has no anthority to intervene in the merger and separation of enterprises except to intervene in the export market by the protective tariff policy, but the enterprises can compete in international market in the form of merger or separation according to their own interests, the duopoly model was extended to a multiopoly model under Krugman- Brander framework, the effects of the variation of the number of enterprises on the enterprise＇ payoffs and trade policies were studied, and the promise and policy effect of flexible organization strategies of enterprises were analyzed. The obtained propositions show that the implementation of the enterprise organization strategies can offset the effect of other countries＇ strategic trade policy, and the rise of the number of enterprises in the industry is helpful to the formation of free trade. Furthermore, it is proved that if the rise of the number of enterprise in different countries causes the increase （ or decrease） of domestic producer surplus, then the domestic enterprises should take a form of separation （ or merger） to participate in the industry competition.     

GMDSS培训改革的探讨

本文论述了GMDSS培训的现状、改革的必要性，改革的思路，并从培训模式、培训内容、培训考核和考试几个方面论述了改革的措施和方法。     

Studies on Arteanninum and Allicinum in the Treatment of Eperythrozoonosis

Since the year 1928, when Schilling andDinger first discovered eperythrozoon from ro-dent[1], eperythrozoon has been spread all over theworld[2~6]. Described by Puntaric and his col-leagues in 1986[7], the eperythrozoonosis has beenattached more and more importance on its infectionroute and outbreak character[7~11]. Since mosteperythrozoonosis is a latent infection and the un-successful artificial cultivation of the pathogeny,the research conducting the life circle, transmis-sion, infection r…     

NUMERICAL SIMULATION OF COUPLED STRUCTURAL- ACOUSTIC PROBLEMS USING FEM/IBEM

Introduction　　Numerical implementation of a coupling vibro-acoustic algorithm for the immersed elastic modelis a key problem.A thin shell interacting with itsexterior is one typical example of osciallatory be-havior.It is improtant therefore to identify thecoupled vibro- acoustic behavior in order to adjustthe vibro- acousticdesign of the interacting system.Some researchers adopted the finite elementmethod to study the coupling system,but theacoustic fluid region is limited in the near field…     

"海大1号"摇臂式波浪发电装置水动力性能研究

浮子的水动力性能是影响波浪发电装置一级能量转换效率的重要因素,为了提高浮子的取能效率,开展浮子的水动力性能研究非常必要.文章以自主研发的"海大1号"摇臂式波浪发电装置为研究对象,基于三维势流理论,推导出浮子在线性规则波作用下的的运动方程,并利用CFD水动力仿真软件分析了不同形状浮子的水动力性能,从而确定了浮子的最优形状;在最优浮子形状的基础上,进一步研究了波长与浮子尺寸关系对浮子水动力性能的影响;用1:1物理模型试验验证了仿真试验结果的正确性,并测得不同波长与浮子尺寸比下浮子的取能效率;最后得出结论:浮子的最优形状为圆柱体+球的混合体,波长与浮子之间的最优关系是波长与浮子尺寸之比为4,此时浮子的水动力性能最佳.文中得出的浮子水动力性能研究结论可为其他波浪发电装置提供参考,具有很好的工程应用价值.     

大型钻井船电力系统谐波分析

分析了大型钻井船电力系统谐波的产生、特性及评价参数,借助Paladin Designbase仿真软件,对1 500 m作业水深钻井船电力系统进行谐波分析计算,依据计算的结果提出了可实际运用的滤波方案。     

新型中型海洋救助船动力装置配置方案论证

全电力推进系统已经成为多工况作业船的主流配置.选用满足船舶功能需求的动力装置,使船舶主电站在各个主要工况下均能经济、安全地运行是前期方案论证的重点工作.结合新型中型海洋救助船"东海救151"的船型开发,通过对中型救助船使命任务的需求分析,对比不同技术方案的利弊,论述全电力推进系统的动力装置配置方案选取过程中的设计要点和创新点,为后续同类型船的设计提供参考."东海救151"的顺利交付列编是中型救助船使用需求与优化设计理念相互融合的体现,为电力推进船舶的动力装置配置方案提出了新的思路.     

欧洲港口物流发展对唐山港发展的启示

港口物流已成为现代物流链中的重要节点,在区域经济发展中具有重要的地位和作用。介绍了欧洲的主要港口物流发展的经验。阐述并分析唐山港口物流发展的优势和存在的问题。提出唐山港口物流的发展对策。     

船舶涂装冲砂派工精细化研究

精细化管理是现代企业所追求的管理模式,在精细化管理下,员工个人能力得到合理安排,整体工作效率得到提升.冲砂作业是涂装作业中重要一环,其精细化派工的实现有利于涂装效率的提升.本文通过对冲砂作业进行分析,研究了不同因素对冲砂效率影响,其中着重研究了作业环境所造成工作人员不同姿势及其对效率的影响,综合分析冲砂作业在不同姿势下的作业效率,并对涂装设计提出改进建议,从而为精细化派工提供了依据.