给排水预制构件的施工技术

我国的工业与民用建筑室外给排水井、化粪池施工较为繁杂,工期长、造价高,相比之下,组合式给排水预制构件为工厂统一制作,现场组装,施工简单,造价低廉,抗压性强,密封性好,更使工期大大缩短,具有远大的前景。

车床改装拉床的液压控制系统和主框架的结构稳定性

利用旧车床改装成LJ8510/CGL型键槽拉床,符合绿色制造减小回收成本的要求。采用通用液压元件组成节能型液压控制系统,提高了机床的自动化程度,设计的框架结构承受由主油缸拉动拉刀形成的沿水平轴线方向的拉削力,利用钢结构原理对机床的主框架结构进行整体稳定性计算,针对受力时可能出现单肢先行破坏的情况,分别对弯矩作用于截面的主轴平面内和平面外的稳定性进行计算。改装后的机床液压控制系统拉削工作需要,试车运转正常,连续4h运行,系统油温升高<20℃;整机质量达到国标要求,其设计和分析方法值得推荐。

Supporting web services reuse by semantic service component and composition pattern

Due to the fact that the existing web service description methods cannot address the issue of service reuse of various levels of granularity, the concept of service component is introduced, which packages together web services and choreography, and their operations and properties are presented in a consistent and uniform manner. Service components are published externally as normal web services and can thus be employed by webbased applications. In order to improve reusability and testability of service components, the concept of composition pattern is also proposed, which presents the relationships among service components. The relationships and relationship compositions have a rigorous semantic, so that composite components can be validated at the configuration stage. The composition patterns support to integrate service components of various levels of granularity. Experience indicates that the application assembly can effectively be conducted by understanding, selecting, and reusing components easily.

现浇预应力混凝土连续空心板梁施工过程中支座钢筋缺乏下的应对策略

利用桥面现浇层参与结构运营阶段受力,预制板与桥面现浇层按组合式受弯构件计算,对施工中墩顶负弯矩钢筋位置放置错误导致的负弯矩钢筋数量不足进行了处理并成功运用,希望能给类似桥梁工程病害的处理方法提供一些补充或参考。