分布式光纤温控在混凝土养护中的应用

在混凝土施工过程中,养护阶段耗时最长,是质量控制中最重要的环节.传统温度控制主要依靠工人经验或单点式温度传感器,缺乏科学有效监测手段大面积实时监控混凝土内部温度.针对衬砌养护阶段的温控难题,在苏锡常南部高速公路太湖隧道建设中,引入分布式光纤传感温度监测技术,实现对混凝土衬砌内部温度的实时监测,从而判断混凝土内部水化热导...     

推行精益生产方式中的工厂物流改善及成功经验

在生产制造管理中,很多企业都在孜孜不倦地追求变革改善和提升,但大多以生产管理或作业改善为主,或比较单纯地以物流管理改善为主。在这种思路下,生产制造和物流管理很难取得根本性的改变和突破。在学习和推进精益生产方式的过程中,意识到生产方式与作业管理和物流管理紧密关联,完全是一个系统和整体,并由此开展了有计划、有步骤的3个阶段的系统变革改善,基本取消了库房,物流效率和生产作业效率、现场管理都得到了大幅度改善和提升,资金占用大幅度降低。     

Experimental exploration of electrical pulse-assisted roller hemming of AZ31B magnesium alloy sheet

The purpose of this research is to explore the feasibility of roller hemming of AZ31B magnesium alloy sheet. During the test, a special experimental setup considering the current flow and insulation was designed and employed. For the sake of simplicity, the flat surface-straight edge hemming style was selected. Electrical pulses were introduced in the pre-hemming and final hemming processes. The results show that when hemming at 448 K with hemming speed of 30 mm/min, AZ31B magnesium alloy sheet was successfully hemmed with excellent perceived quality. No recoil/warp defect, cracking or springback was observed. Electrical pulses induced dynamic recrystallized grains were observed along the grain boundaries in the severely deformed area, which is of great importance to the improvement of the ductility of the material. The hardness was slightly increased after hemming with electrical pulses, and this fact could improve the friction resistance performance of the hemmed part.     

CR400AF型动车组停放制动管路优化研究

针对CR400AF型动车组停放制动管路设计提出优化措施,增加停放控制隔离塞门,使线路运行过程中停放制动控制模块出现故障时的应急处置更加合理。     

Vacuum Brazing of TiAI Based Alloy with 40Cr Steel

The vacuum brazing of TiA1 based alloy with 40Cr steel was investigated using Ag-Cu-Ti filler metal.The experimental results show that the Ag, Cu, Ti atoms in the filler metal and the base metal inter-diffuse toward each other during brazing and react at the interface to form an inter-metallic A1Cu2Ti compound which joins two parts to produce a brazing joint with higher strength.     

某高速公路X1标试验路方案设计

根据某高速公路X1标的具体地质情况和施工条件,比较详细地介绍了该标段试验路施工工艺流程、方案、施工控制要点、注意事项等方面内容.对高等级公路试验路施工控制有一定的实际指导意义.     

浅析利率波动对房地产市场的影响——以青岛城阳区为例

近年来,央行多次采取上调利率的紧缩货币政策进行宏观调控以确保经济正常运行。作为一个对利率敏感的部门,房地产行业受利率波动的影响越来越大。本文以青岛市城阳区的房地产状况为例,分析利率和房地产市场之间的关系,以及利率调整对房地产市场的影响,并提出相应的对策建议。     

主机遥控系统扭矩限制参数的调整

此文提出参数飘移后扭矩限制调整的问题,从扭矩限制造成主机自动减速现象,简要分析某船主机遥控系统中扭矩限制功能结构,介绍调整扭矩限制参数的方法。