数控机床无报警故障的诊断与调试

全面地分析故障现象是决定判断是否正确的重要因素。在查找故障原因前 ,首先必须了解以下情况 :①故障是在正常工作中出现还是刚开机就出现的 ;②出现的次数 ,是第 1次还是已多次发生 ;③确认机床的加工程序不会有错 ;④其他人员是否对该机床进行了修理或调整。     

打印机的故障探索与维修

本文对打印机检测器及存折打印的机理、性能进行了详细探讨，并列举了常见故障解决办法。     

基于单片机控制的太阳能热水器全自动电路

通过对目前市场上几种主要热水器的智能控制进行分析，发现其设计中的不足之处，并进行针对性的改进，设计了单片机控制电路，该电路用于太阳热水器，能实现仅在用水时，若日晒水温达不到设定值，则电加热自动补温。用于电热水器，能实现在深夜用低谷电自动加温，白天用水时自动补温。实现了热水器的全自动及节能。达到智能控制方案的最优化，从而实现真正意义上的“全自动控制”。     

中国传统社会诉讼意识之反思

从农耕文明及儒家文化对中国传统社会的诉讼意识所造成的影响两方面进行论述,阐释了传统法律文化的基本特质及无讼的诉讼意识,为我们反思现代性诉讼文化提供参考.     

USB接口芯片SL811HS在51单片机系统中的应用

介绍了CYPRUS公司生产的主／从双工作模式USB接口芯片SL811HS的性能与内部结构，给出了SL811HS芯片在单片机系统中扩展USB接口的硬件电路，同时给出了该系统的USB驱动程序及实现U盘读写功能的应用程序。     

ISI-2802激光直写系统及其应用

介绍中国科学院光电技术研究所微细加工光学技术国家重点实验室引进的国内首台激光直写系统的工作模式、基本结构、主要性能和应用范围等，并给出用这台设备已经作出的一些掩模图形的样品。     

Improved oxidation life of segmented plasma sprayed 8YSZ thermal barrier coatings

Unconventional plasma sprayed thermal barrier coating (TBC) systems were produced and evaluated by interrupted or cyclic furnace oxidation life testing. First, approximately 250 μm thick 8YSZ coatings were directly sprayed onto grit blasted surfaces of PWA 1484, without a bond coat, to take advantage of the excellent oxidation resistance of this superalloy. For nominal sulfur (S) contents of 1 ppmw, total coating separation took place at relatively short times (200 h at 1100°C). Reductions in the S content, by melt desulfurization commercially (0.3 ppmw) or by hydrogen (H₂) annealing in the laboratory (0.01 ppmw), improved scale adhesion and extended life appreciably, by factors of 5–10. However, edge-initiated failure persisted, producing massive delamination as one sheet of coating. Secondly, surfaces of melt desulfurized PWA 1484 were machined with a grid of grooves or ribs (∼250 μm wide and high), resulting in a segmented TBC surface macrostructure, for the purpose of subverting this failure mechanism. In this case, failure occurred only as independent, single-segment events. For grooved samples, 1100 °C segment life was extended to ∼1000h for 5 mm wide segments, with no failure observed out to 2000 h for segments ≤2.5 mm wide. Ribbed samples were even more durable, and segments ≤6 mm remained intact for 2000 h. Larger segments failed by buckling at times inversely related to the segment width and decreased by oxidation effects at higher temperatures. This critical buckling size was consistent with that predicted for elastic buckling of a TBC plate subject to thermal expansion mismatch stresses. Thus, low S substrates demonstrate appreciable coating lives without a bond coat, while rib segmenting extends life considerably.     

校正激光直写邻近效应的快速方法

针对激光直写中的邻近效应的特点，提出通过直写曝光数据补偿进行光学邻近效应校正的快速，有效方法，并获得了满意的实验结果。     

JF971型盘式刹车片表面涂装生产线的研制

讨论了汽车盘式刹车片表面涂装的特殊性。着重介绍了汽车盘式刹车片表面涂装生产线设备的结构、工作原理和技术参数。对工作条件的要求等工艺问题作了一定的叙述。