分段施工PC梁桥线形的分形预测方法

充分考虑到分段施工PC梁桥施工阶段线形变化的非线形,复杂性和随机性,提出一种基于分形理论的节段线形预测方法。采用滚动选取预测样本降低原始误差累计的方法,建立了节段施工线形预测理论模型。将此模型应用于黄河大桥悬臂施工线形预测控制中,按节段施工周期依次预测下一节段的线形指标,结果证实了分段施工PC梁桥线形变化的分形特征,与实测和理论值相比,预测值具有较高的工程精度。     

奇瑞A3轿车电子智能防盗系统解析

汽车防盗控制系统是现代汽车电控的一个主要组成系统,其功能是防止汽车被非法起动或开走,本文对奇瑞A3轿车的电子智能防盗系统主要原理、组成以及防盗系统使用与维修方法:等进行介绍。     

大同市北都桥总体结构设计及计算分析

重点介绍了山西省大同市连接新老城区的一座重要城市景观桥梁——北都桥的结构设计和施工方案。该桥主桥采用单跨140 m的下承式钢桁架拱桥,单侧双吊杆设计。通过静力、稳定计算分析及拱脚局部三维分析,验证了该设计方案的合理性以及安全性。可为同类桥型设计提供参考。     

建立高速铁路立体监测诊断平台适应维护管理需要

高速铁路立体监测诊断平台是在传统的信号微机监测基础上进行深度拓展和后台开发的诊断系统。介绍了平台建立的概念,条件,基本组成和主要功能,特别对电务子系统的发展应用提出了意见和建议。     

骨架格构梁三维网喷播植草技术应用

萝岗中心区某市政道路及配套工程项目位于广州科学城内,设计要求为公路一级,道路沿线有三段高边坡施工,按照设计要求,边坡防护采用骨架混凝土格构梁与三维网喷播植草的方法,三维网喷播植草是一种能在纯石质边坡上进行绿化的新工艺。该文着重介绍了预制骨架格构梁的制作与安装,以及三维网喷播植草的技术,可供同行参考。     

狭小空间底模支设施工技术

主要探讨了如何有效地在100 mm的狭小空间进行底模的支设,并保证现浇混凝土轨道梁的质量,同时底模必须方便顺利地取出,确保车站结构的使用安全性。     

电感式传感器在吊具导向轮检测中的应用

汽车涂装车间设备种类繁多,许多运动设备故障隐蔽,在日常巡检过程中不易发现,常由于小问题而酿成大的设备损坏及安全事故。通过引入电感式传感器检测技术,有针对性的创新改造,实时在线的对这些设备进行监控,达到设备故障提前检测、预防维修的目的。     

Legal and practical consequences of not complying with ISM code

Almost a decade since port corporatization was introduced in Australia it is becoming clear that initial objectives are not being realized. This paper explores some of the legal and legislative causes, the effect on port operation and investigates what necessary conditions are required to deliver an effective corporatized port business. The paper argues that effective corporatization is a product of effective legislation—one which, while emulating private sector business practices—can deliver a business model that is innovative, entrepreneurial, commercially oriented and free from self-serving political constraints.

The legislation and corporatized artifacts in Australian mainland ports have failed, in general, to deliver this. Arguably, the legislation has, in fact, created a model with inherent flaws and serious contradictions. The legislation enacted is such that while it has set in place a model that articulates commercial objectives, the model created is in fact one in which political objectives may override commercial ones; where strategy may be determined by a bureaucratic elite without the requisite skills and insights, and the resultant strategy appears ad hoc; and a corporate culture that frequently has failed to transcend that of the statutory authority and public utility model. This paper will test these assertions against the developments in the port of Melbourne.     

适应高爆发压力的高性能柴油机气缸盖设计

以某4DC发动机的基本参数为输入条件,对气缸盖进行了概念定义及详细设计,着重介绍了气道、油道、喷油器、配气机构和冷却水套的定义过程以及为保证气缸盖刚度和强度采取的技术措施,提出了气缸盖W型水套的概念。对该气缸盖设进行的设计评估结果表明,其使用性能、冷却性能、结构可靠性、铸造性能均满足设计要求,且气缸盖质量仅为30 kg,实现了气缸盖设计轻量化目标。     

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