PC与RC空心墩抗震性能试验对比

为研究PC空心墩的抗震性能,设计制作了3个PC空心墩(1个整体式和2个装配式),并用1个RC空心墩作为对比试件,对4个试件进行了拟静力试验.基于试件的破坏特征、滞回性能、曲率分布、剪切变形等试验结果,详细比较了RC及PC整体式、PC装配式空心墩的承载力、刚度、延性、耗能、复位能力等抗震性能,分析了预应力轴压比对空心墩抗震性能的影响.研究结果表明:RC空心墩中布置无粘结后张预应力筋可以有效降低残余位移,对累积滞回耗能影响不大,但可减小等效粘滞阻尼比;布置耗能钢筋的PC装配式空心墩的自复位能力较强,曲率分布和剪切错动主要集中在墩底接缝处,其损伤程度比整体式空心墩轻的多;预应力轴压比过大可导致保护层混凝土提前被压碎,使空心墩屈服后出现负刚度.     

后装压缩式垃圾车过载保护装置设计

针对后装压缩式垃圾车在实际使用过程中装载量不易控制,存在过度超载导致车辆异常损坏的问题,介绍了一种过载保护装置,对防止车辆过载提出了解决方案。     

大排量摩托车操作技术要点

本文阐述了大排量摩托车在检测及驾驶过程中的技术要领,从基本驾驶要点、台架驾驶基本方法、道路测试驾驶基本方法等几个方面进行了详细描述,提出了较为实用的技术要点,用以更好的指导试车员驾驶和检测中大排量摩托车。     

停车场自动管理技术与设备

停车场自动管理,是利用高度自动化的机电设备对停车场进行安全、有效的管理,由于尽量减少人工的参与,从而最大限度的减少人员费用和人为失误造成的损失,大大提高整个停车场的安全性与使用效率。     

一种个体特征脸子空间与奇异值相结合的人脸验证算法

提出了一种个体特征脸子空间与奇异值特征相结合的人脸验证方法。该方法首先利用小波变换减小表情因素对人脸验证的影响，再为每个人建立单独的个体特征脸子空间。验证时，将测试人脸投影到训练样本的特征脸子空间上，然后利用样本特征脸子空间的奇异值特征矢量在欧氏距离上进行验证。本文为ORL人脸数据库制定了实验协议，并在此基础上进行了测试，取得了较好的结果。     

苏州太湖避风港工程总体设计

太湖湖区风大浪急,时有船舶翻沉事故发生.从港址选择、规模确定、口门方向选择和结构物设计等方面全面总结太湖避风港的设计,并阐述施工技术要求和设计体会.     

散装化学品船舶见习生的培养建议

对散装化学品船舶的发展状况、特殊性以及散装化学品船舶船员要求的特殊性进行详细论述,提出船岸培训相结合的思路,并提出散装化学品甲板见习生的培训大纲及培养建议。     

积极推进专业现代化建设培养高素质海运人才

从学校定位和发展目标出发,介绍了南京海运学校推进专业现代化建设,培养高素质海运人才的路与实践。     

Design-Manufacture Interface Relationship Management in Supply Chain

As firms come under greater market pressure, the management of the inter-functional design/manufacture relationship becomes a more important competitive variable. The characteristics of the design-manufacture interface were analyzed, and several methods of the design-manufacture interface relationship management were compared. Based on theories concerned and enterprise practice, how to manage the relationship of design-manufacture interface to reduce the product cost and shorten the time-to-market was demonstrated, finally the competitive advantage was improved.     

Modeling Study of Planar Flexible Manipulator Undergoing Large Deformation

The planar flexible manipulator undergoing large deformation is investigated by using finite element method (FEM). Three kinds of reference frames are employed to describe the deformation of arbitrary point in the flexible manipulator, which are global frame, body-fixed frame and co-rotational frame. The rigid-flexible coupling dynamic equation of the planar flexible manipulator is derived using the Hamilton’s principle. Numerical simulations are carried out in the end of this paper to demonstrate the effectiveness of the proposed model. The simulation results indicate that the proposed model is efficient not only for small deformation but also for large deformation.