综采工作面压力实时监测系统的应用

以羊场湾煤矿120204综采工作面为例,介绍了一种工作面压力实时监测系统的设计。该系统根据压力监测单元采集的各支架前柱、后柱、前梁压力参数,由地面主机中的分析软件给出量化分析结果,即支架前后柱及前梁压力变化、支架立柱的工作特性、支架立柱循环阻力的频率分布、顶板压力分布;并可根据支架立柱的工作特性分析结果分析支架压力变化与顶煤破碎效果之间的关系,从而为提高放顶煤效率提供依据。实际应用表明,该系统功能完善,能有效地反映工作面压力变化的全过程。     

交换机冗余链路引起的网络拥塞问题

网络中,冗余链路可以保障网络的高可用性,但它也会引起数据帧在网路中不停地兜圈,导致广播风暴、MAC地址表不稳定、重复帧等,从而引起网络拥塞。该文结合模拟实验探讨了交换机的工作原理及数据转发流程,及如何避免数据帧的兜圈引起网络拥塞,为网络设备的高可用性配置提供了实践指导。     

浅谈江西交通职业技术学院值班管理系统解决方案

我院经过多年的努力与改革,不断完善值班管理系统功能,并取得了初步的成效。该文结合我院实际情况,从建设原则、设计实施、运行情况及解决方案等几个方面,分析了我院值班管理系统建设中需要解决的一些问题和一些开发心得。     

室内艺术设计的工作思维模型

室内艺术设计现象背后的本质是设计思维,通过对人的思维模式进行梳理、归纳和总结得出:人面对单一事物时应用模仿、继承或反叛思维,面对复合事物时应用加法和减法思维这一基本思维模式。并且针对室内空间艺术的三级属性的设计实现,探索和建立了室内艺术设计一般的工作思维模型。     

大型喷浆机器人的工作空间分析

对机器人工作空间的求解方法进行对比研究。针对大型喷浆机器人的具体特点 ,使用蒙特卡洛法分析其工作空间 ,取得了良好的效果。     

面向产品族的建模技术研究

文中针对大规模定制生产中的快速变型设计要求,研究了产品族模型的组成和表达方法,提出了产品族建模中的关键技术;建立了一个适合于产品族建模的信息环境。     

Effects of training to implement new tools and working methods to reduce knee load in floor layers

The purpose was to measure the effect of a participatory ergonomics implementation strategy consisting of information, education, and facilitation on the use of new tools and working methods in the floor laying trade. Floor layers (n=292) were trained in using new working methods. The effects were evaluated by using questionnaires, interviews, and assessments of quality and productivity. Following the training, 43% had used the new working methods weekly/daily compared to 11% before. There was a reduction in the degree of self-reported pain in the knees among the floor layers using the new working methods weekly or daily compared to those using them never or occasionally. The musculoskeletal complaints did not increase from any other region and the quality and the productivity of the work were not decreased. This indicates that within a 3-months perspective the implementation strategy succeeded.     

基于逆系统方法的综放工作面控制系统的模糊控制器

对逆系统方法作为反馈线性化方法及其非线性本质进行深入的研究后,认知到逆系统方法建立的模糊控制器是一种变增益的非线性控制器,它与PID控制器有许多相似之处,进而设计出模糊PID复合控制器。模糊PID控制器在综放工作面中的应用的关键是模糊控制器的各个参数的整定。因此,我们用传统的方法首先设计一个PID控制器,在稳定时使模糊PID控制器的参数与PID控制器的对应参数相等,逐步调节、修改各个参数,从而可以得出模糊PID控制器的参数,模糊PID控制器在煤矿综放工作面上运用的结果令人满意。     

The psychological effects on man of air movement and the colour of his surroundings

The psychological microclimate is a term which is used to describe the specific psychological effects of some environmental agents as well as the psychological effects of other factors of the physical environment (e g, colour of surroundings, etc). This paper considers air motion and colour schemes of space, defines their stress and strain factors, describes the psychological effects - post-strain, and the methodology of their investigation. It further suggests the criteria and limiting and optimum values of the dynamic effect of air (permissible air velocities in interior and exterior environments) and the colour scheme of space (in accordance with the Tektronix standard). In conclusion the paper sums up the possibilities of optimisation of the 'psychological microclimate'.