Development and implementation of a NURBS curve motion interpolator

This paper deals with the issues of development and implementation of a real-time NURBS interpolator for a six-axis robot. Using an open-architecture controller system as a testbed, a real-time NURBS curve interpolator was developed, implemented and tested. Sample runs were conducted with the resulting trajectories measured in real-time during robot motion. The resulting trajectories are analyzed, discussed and compared with those from a commonly used point-to-point approximation technique. The real-time NURBS curve interpolator's feasibility, advantages and related issues are also discussed.     

石油天然气长输管线用钢新进展

本文介绍了１９９０年以来国外在石油天然气长输管线用钢方面的最新成果，以获得较低的强度和韧性匹配为目的经轧后加速冷却工艺后的钢的强度的预测和控制；具有优良抗氢致裂纹的含硼、微碳、低硫、Ｎｂ－Ｔｉ微合金化、Ｘ６５－Ｘ８０级管线钢的开发，满足于特殊性能要求的ＴｉＯ处理技术及Ｘ８０级ＴｉＯ细化晶粒钢、低硬度和低屈强比钢，以及复合板加工耐腐蚀钢管的生产。     

新设备新工艺在热镀锌机组上的应用

汽车工业是21世纪的支柱产业之一.随着中国加入WTO和世界经济一体化速度的加快,国内汽车市场成为国际竞争舞台,作为高级轿车外板主要原材料之一的热镀锌板以其良好的性价比越来越受到汽车行业的青睐.通过宝钢现有热镀锌机组与国外同类热镀锌机组的对比,简要介绍一些新设备、新工艺在现代热镀锌机组上的应用,主要包括前清洗、退火炉、镀锌段和平整段.     

两栖装甲装备故障诊断智能检测系统设计

针对目前两栖装甲装备故障检测时间长、检测效率低的缺点,研究设计了一种两栖装甲装备故障诊断智能检测系统。系统充分利用现代最新发展的大规模集成电路技术和数字处理技术,对多发、易发故障部位的故障信号进行采样、检测及处理,从而快速确定故障部位,便于及时排除故障。     

面向高端装备制造CAE技术的机遇和挑战

针对高端装备制造在设计、分析、制造、服役和维护等全过程中对CAE的需求,从结构、流体以及流固耦合等3个方面概述CAE技术国内外进展及其面临的机遇和挑战,指出在发展具有能够对装备在极端服役环境下准确的结构、流体和流固耦合CAE分析技术的基础之上,需不断突破面向工程应用的多物理场耦合、跨尺度分析、多学科综合设计、产品性能评估和集成等关键技术,使CAE逐步向支持现代设计和全寿命周期管理转变.     

基于工作过程导向的《网络设备配置与管理》课程开发研究

简要介绍了德国双元制职业教育理论以及传统学科体系的课程模式的弊端,详细阐述了基于工作过程导向的《网络设备配置与管理》课程开发,包括整体改革思路、行动领域、学习领域、学习情境,以及教学过程等。     

Comparison of three internationally certified firefighter protective ensembles: Physiological responses,mobility, and comfort

BackgroundFire protective ensembles (FPEs) are essential to safely perform firefighting job tasks; however, they are often burdensome to the workers. The aim of this study was to compare three internationally certified fire protective ensembles from the European Union (EU), South Korea (SK), and United States (US) on physiological responses, mobility, and comfort.MethodsTen male professional firefighters performed a battery of exercises in the laboratory following the ASTM F3031-17 standard to evaluate mobility, occupation-specific performance, and physiological responses (body weight, heart rate (HR), core temperature (T_c), breathing rate (BR), and rating of perceived exertion (RPE)) to 20 min of treadmill walking (3.2 mph, 5% incline). All participants carried out the evaluation wearing each FPE in a random order. Mixed effects models examined time (pre-vs. post-) by ensemble (EU, SK, US) interactions for all physiological variables and compared comfort, performance, and subjective variables across ensembles.ResultsNo interaction effects were observed for body weight, HR, T_c, BR, or RPE (p = 0.890, p = 0.994, p = 0.897, p = 0.435, and p = 0.221; respectively). SK had greater trunk flexion than EU (78.4° vs. 74.6°, p = 0.026) and US had lower standing reach than EU (105.5 cm vs. 115.4 cm, p = 0.004). Agility circuit time was lower in US (9.3 s) compared to EU (9.8 s) or SK (9.9 s) (p = 0.051 and p = 0.019, respectively).ConclusionsThe findings suggest that physiological burden remained largely unchanged across the international FPEs. However, mobility, performance, and comfort may be significantly influenced across types. International stakeholders and end users should consider design implications when choosing fire protective ensembles.     

IPv6在矿井工业以太网中的应用研究

介绍了IPv6产生的背景和发展现状,阐述了IPv6应用于矿井工业以太网的发展趋势和研究方向,指出对于所有基于矿井工业以太网的硬件和软件的开发都应带有双协议栈,随着IPv6技术的成熟和普及再研发出只有IPv6协议栈的适用于煤矿的网络设备,如支持IPv6的防爆网络设备、组态软件以及相应的数据采集驱动设备、控制硬件等。     

选煤厂设备巡检系统设计

针对传统的选煤厂设备管理方法存在漏检漏查、无专用仪器、数据处理繁琐等问题,提出了一种新型的选煤厂设备巡检系统的设计方案。在巡检线路及设备上安装相应的感应卡,巡检人员携带巡检仪到各点读卡,把代表该点的卡号和时间记录下来,同时完成规定的巡检和数据采集工作,然后进行下一点的巡检任务;巡检工作完成后将巡检仪的数据传送到监控计算机,由巡检数据综合信息管理软件进行处理,从而达到对巡检情况进行记录和考核的目的。实际应用表明,该系统运行稳定、功能实用。     

IETM技术在便携式工卡系统中的应用研究

从飞机制造的角度出发,以IETM技术为基础,以带Windows 7操作系统的便携式终端为硬件平台,研究开发应用于某机机载机电设备装配指导的交互式电子工卡系统。文中主要介绍了系统设计的背景知识、开发架构和软硬件实现方法,结合XML和SQL数据库技术创作符合GJB6600标准的应用系统。该系统的成功研制和投入使用可将电子信息技术的最新研究成果用于生产实践,既可有效地减轻生产一线工作人员的劳动强度,又能极大地提高飞机数字化制造效率。