土木工程专业毕业设计选题改革与过程控制机制的研究实践

文章在分析土木工程专业毕业设计现状及产生问题原因的基础上,提出了达到毕业设计目标的选题供应和过程控制理念,进而以山东建筑大学土木工程学院为例,介绍了从选题分组、过程监督、分段检查和及时预警等全过程的控制措施。这种过程控制机制在该院试行后,毕业设计质量取得明显好转。

建筑工程给排水造价的全过程控制要点分析

本文将结合个人从事建筑给排水工程成本造价全过程控制的工作实践,分析当前国内建筑工程给排水成本造价管控的不足及问题,论述构建建筑工程给排水成本造价全过程控制机制的路径与要点。希望本文能为同行业者提供学习借鉴和有益参考。

职业教育运行保障机制的研究

建立职业教育运行保障机制,可以在职业教育办学过程中起到方向指示、协调控制、质量保障的作用。因此,在职业学校内部必须构建一套行之有效的运行保障机制。另外,职业教育运行保障机制的内涵会随着社会经济的变革而发生变化,构建职业教育运行保障机制是一个动态的系统工程。

树立卓越质量经营理念实现企业质量管理水平的提高

进入21世纪，科技进步日新月异，经济全球化加快发展，国际竞争手段已由原来的数量扩张和价格竞争，越来越转向质量和标准的竞争。因此，质量管理和技术标准越来越成为国际竞争的战略制高点，实施以质取胜的战略已经成为企业的普遍选择，只有做到扎实的内部机制、绩效管理，一流的生产制造以及一流的过程控制，形成一种企业整体合力，相互依托，相互促进，才能产生1＋1》2的作用，也才能立于世界企业的不败之林。

Dynamic characteristics of cold rolling mill and strip based on flatness and thickness control in rolling process

The dynamic model of cold rolling mill based on strip flatness and thickness integrated control was proposed,containing the following sub-models:the rolling process model,the dynamic model of rolls along axial direction,and the compensation model.Based on the rule of volume flow rate,the dynamic rolling process model was built.The work roll and backup roll were taken as elastic continuous bodies,the effect of shear and moment of inertia were taken into consideration,and then the dynamic model of rolls was built.The two models were coupled together,and the dynamic model of rolling mill was built.In the dynamic model,the thermal expansion of the rolls,the wear of the rolls and other related parameters can not be considered.In order to compensate the dynamic model,the coupled static model of rolls and strip was applied.Then,according to the inner relationship of these models,the dynamic model and the compensation model were coupled,and the dynamic model of rolling mill based on the strip flatness and thickness integrated control was built.The dynamic simulation of the rolling process was made,and the dynamic thickness and the dynamic flatness information were obtained.This model not only provides a theory basis for the virtual rolling,but also provides a platform for the application of advanced control theory.

Modeling of Welding Process by Robotic Vision

Modeling of welding process by robotic vision is basically a theoretical problem, means mainly on physical problem, and also technological problem. To obtain a good model of welding process by robotic vision, theoretical researches are required but also constant experimental researches of several welding processes. Until today researches of welding processes has been based on empirical and detailed experimentation. This paper presents welding process by robotic and automation points of view with application of new technologies. Welding robotic system has been designed with possibility to control and inspect this process. Parameters that should be controlled during the process have been identified to reach desired quality. Figure of control system of welding process by robotic vision is given in this paper.

Deviation Diagnosis and Analysis of Hull Flat Block Assembly Based on a State Space Model

Dimensional control is one of the most important challenges in the shipbuilding industry. In order to predict assembly dimensional variation in hull flat block construction, a variation stream model based on state space was presented in this paper which can be further applied to accuracy control in shipbuilding. Part accumulative error, locating error, and welding deformation were taken into consideration in this model, and variation propagation mechanisms and the accumulative rule in the assembly process were analyzed. Then, a model was developed to describe the variation propagation throughout the assembly process. Finally, an example of fiat block construction from an actual shipyard was given. The result shows that this method is effective and useful.