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数控系统机床环境仿真仪设计
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作者 张莉 蒋玲玲 邬宝寅 《机床与液压》 北大核心 2017年第4期29-32,145,共5页
研制一种可用于华中HNC-21M3铣床数控系统主机调试、仿真运行和故障诊断的电子装置,设计该装置的硬件电路原理和嵌入式程序。装置具有可编程模拟机床环境功能,可以与数控系统主机的主轴、伺服、PLC接口对接,针对数控系统主机进行参数调... 研制一种可用于华中HNC-21M3铣床数控系统主机调试、仿真运行和故障诊断的电子装置,设计该装置的硬件电路原理和嵌入式程序。装置具有可编程模拟机床环境功能,可以与数控系统主机的主轴、伺服、PLC接口对接,针对数控系统主机进行参数调试、PLC程序调试、仿真运行、故障诊断等操作。 展开更多
关键词 数控系统 机床环境 仿真仪
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谈《机床数控技术》课程教学 被引量:1
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作者 周丹 《重庆科技学院学报(社会科学版)》 2010年第2期174-175,共2页
探讨机床数控技术教学过程的设计和规划,设置多元化教学环境,改变单一的教学检验方式以提高学生的综合素质。
关键词 机床数控技术:教学过程:教学环境
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Evaluation of Eco-efficiency and Effect on Environment of Remanufacturing A Case Study of CNC-remanufacturing for Used Machining Tools
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作者 HU Zhong-xiang SHI Xiao-jun SHI Lei 《Journal of Donghua University(English Edition)》 EI CAS 2005年第5期34-36,共3页
A case of remanufacturing used lathes via CNC technology is introduced, whose environmental and economic benefits are evaluated respectively. The results indicate that these environmental and economic benefits are rem... A case of remanufacturing used lathes via CNC technology is introduced, whose environmental and economic benefits are evaluated respectively. The results indicate that these environmental and economic benefits are remarkable, which are directly affected by remanufacturing design, more than 90% materials in used lathes are reused. Finally, the causes of economic and environmental benefits of remanufacturing machine tools are put forward. The remanufacturing design method, implementation procedure, and evaluation method of economic and environmental benefits presented are helpful for other equipment remanufacturing. 展开更多
关键词 REMANUFACTURING CNC Machine Tool environmental benefits evaluation method
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Industrial Fault Signals Propagation and Current Signature Analysis
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作者 Alireza Gheitasi Adnan AI-Anbuky 《Journal of Energy and Power Engineering》 2013年第2期361-369,共9页
Motor current signature analysis provides good results in laboratory environment. In real life situation, electrical machines usually share voltage and current from common terminals and would easily influence each oth... Motor current signature analysis provides good results in laboratory environment. In real life situation, electrical machines usually share voltage and current from common terminals and would easily influence each other. This will result in considerable amount of interferences among motors and doubt in identity of fault signals. Therefore, estimating the mutual influence of motors will help identifying the original signal from the environmental noise. This research aims at modelling the propagation of signals that are caused by faults of induction motors in power networks. Estimating the propagation pattern of fault signal leads to a method to discriminate and identify the original source of major events in industrial networks. Simulation results show that source of fault could be identified using this approach with a higher certainty than anticipated output coming of any individual diagnosis. 展开更多
关键词 Motor current signature analysis signal interference decision making signal propagation.
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Long-term natural history of Crohn’s disease 被引量:1
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作者 Hugh James Freeman 《World Journal of Gastroenterology》 SCIE CAS CSCD 2009年第11期1315-1318,共4页
Crohn’s disease is a chronic inflammatory granulomatous process that usually involves different sites in the intestinal tract. Genetic and environmental factors are thought to play a role in its etiology and pathogen... Crohn’s disease is a chronic inflammatory granulomatous process that usually involves different sites in the intestinal tract. Genetic and environmental factors are thought to play a role in its etiology and pathogenesis. The disorder has a heterogeneous clinical expression and data from tertiary care settings have documented its female predominance, occasional familial nature, and high rate of stricture formation and penetrating disease. It may appear from early childhood to late adulthood, although over 80% are currently diagnosed before age 40 years, usually with terminal ileal and colonic involvement. Several studies have now shown differences in phenotypic clinical expression depending on the initial age at diagnosis, with pediatric-onset disease being more severe and more extensive with more involvement of the upper gastrointestinal tract compared to adult-onset disease. In addition, long- term studies from these tertiary care settings have documented that the disorder may evolve with time into a more complex disease with stricture formation and penetrating disease complications (i.e. fistula and abscess). Although prolonged remission with no evidence of inflammatory disease may occur, discrete periods of symptomatic and active granulomatous inflammatory disease may re-appear over many decades. Long-term studies on the natural history have also suggested that discrete events (or agents) may precipitate this granulomatous inflammatory process. 展开更多
关键词 Natural history Crohn's disease Age-dependent phenotypes Clinical behavior Granulomatous inflammation
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