数学处理在数控铣削中的应用

用数控铣床加工机械零件时,由于铣削方法或铣削刀具等工艺条件的限制,对于由直线、圆弧、非圆曲线、空间曲线和曲面等组成的轮廓曲线必须进行相应的数学处理,合理安排工艺路线,才能进行数控编程,加工出与设计要求相符的图形形状.     

热带钢轧机辊型在线检测现状与发展

辊型在线检测是提高热带质量的关键技术。在综述了国内外热带钢轧机辊型在线检测现状的基础上 ,对几种典型检测装置的结构、原理和性能进行了分析比较 ,并指出辊型在线检测技术的发展趋势。     

酸轧机组薄带无套筒卷取工艺研究与应用

针对0.35 mm规格无取向中低牌号硅钢薄带套筒卷取无法保证连续批量生产及卷取质量的问题，对其卷取工艺进行了分析与研究。结果表明，卷取张力、张力锥系数、张力锥作用卷径系数以及皮带助卷器压力是其主要影响因素。通过卷取参数的优化试验，确定了0.35 mm规格无取向中低牌号硅钢薄带的无套筒卷取最优工艺参数，下线钢卷质量良好。薄带无套筒卷取工艺在酸轧机组的应用，不仅提高了钢卷内圈质量，还降低了套筒的周转与消耗，从而降低了无取向硅钢的生产成本。     

辊弯成形生产线中料头料尾焊接技术的探讨

在辊弯成形生产线及冲压生产线中，为了提高生产效率和材料利用率，常将卷料的料头与料尾焊接在一起。作者结合自已的实践经验，对料头与料尾的焊接技术以及与此有关的料头料尾剪切齐头、对缝、压料等技术进行了探讨。     

Diffusion bonding/superplastic forming of Ti-6Al-6V-2Sn/SUS 304 stainless steel/Ti-6Al-6V-2Sn

The superplasticity of the Ti- 6Al- 6V- 2Sn alloy for different temperatures was evaluated by single-sheet free blowing. The optimal superplastic temperature for the Ti- 6Al- 6V- 2Sn alloy was found to be 850 °C. Diffusion bonding of Ti- 6Al- 6V- 2Sn and 304 stainless steel was carried out in a vacuum. The interface of both bonded alloys was examined by EPMA. The concentration profile of Ni exhibited a peak at the interlayer and a valley adjacent it, whereas that of Cr exhibited a peak where Ni showed the valley. X- ray diffraction (XRD) analyses showed that the Fe ₂ Ti, NiTi, and CrMn Intermetallic compounds and the Cr element formed at the interface. The thickness profiles of the blown specimens were measured and compared with theoretical calculations.     

录像机磁头VC卷线自动生产线的监控管理系统

文章介绍了录像机VC卷线自动生产线监控管理系统的更新改造工作.详细介绍了该系统的硬件改造方案和软件设计开发工作.该系统在实际生产中,运行可靠,达到了设计目标.     

铝熔体在线除气装置的特性及其改进

介绍铝合金熔体在线除气装置的组成，工作原理，工艺流程和主要特性，以及在装置上采取的一些改进措施。     

珠钢CSP热轧组织性能预报软件界面设计

介绍了针对珠江钢厂CSP热轧生产线开发的组织性能预报系统软件界面，其简洁、直观、易学易用，已在珠钢成功应用。     

基于MSPC方法的GMAW在线监测

熔化极气体保护焊(GMAW)广泛地应用于自动焊中，其焊接过程在干扰存在的情况下易产生焊接质量问题，因此，自动焊中焊接质量的在线监测已成为制造业中亟待解决的问题之一。为实现焊接产品质量的“零缺陷”及生产过程质量监测的目标，采用电弧传感获取的电信号，从单变量统计过程控制的应用结果出发，提出了把多变量统计过程控制(MSPC)应用于GMAW过程的在线质量监测。并在自我开发的一套在线监测系统上，通过试验验证了MSPC方法的可行性。     

Video summarization via minimum sparse reconstruction

The rapid growth of video data demands both effective and efficient video summarization methods so that users are empowered to quickly browse and comprehend a large amount of video content. In this paper, we formulate the video summarization task with a novel minimum sparse reconstruction (MSR) problem. That is, the original video sequence can be best reconstructed with as few selected keyframes as possible. Different from the recently proposed convex relaxation based sparse dictionary selection method, our proposed method utilizes the true sparse constraint L₀ norm, instead of the relaxed constraint _L2,1$L_{2,1}$ norm, such that keyframes are directly selected as a sparse dictionary that can well reconstruct all the video frames. An on-line version is further developed owing to the real-time efficiency of the proposed MSR principle. In addition, a percentage of reconstruction (POR) criterion is proposed to intuitively guide users in obtaining a summary with an appropriate length. Experimental results on two benchmark datasets with various types of videos demonstrate that the proposed methods outperform the state of the art.