共查询到20条相似文献,搜索用时 93 毫秒
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《中国设备工程》2017,(8)
海南联网工程是我国第一个超高压、长距离、大容量的跨海联网工程,也是世界上继加拿大温哥华岛联网项目之后的第二个同类工程。海南联网系统包括500kV福山变电站、500kV林诗岛海底电缆终端站、500kV南岭海底电缆终端站、500kV徐闻海底电缆高抗站、500kV福港线架空线路、500kV福港线海底电缆。其中,福港线海底电缆长度为世界第二、亚洲第一,同时也是国内电压等级最高、技术最复杂、运行维护难度最大的海底电缆。由于海底电缆长期埋设在海底,海底沉积物可能会对海底电缆电缆产生缓慢的腐蚀行为。为了解海底电缆的腐蚀环境信息,本研究通过对海底电缆路由进行海底沉积物采样,分析研究海底沉积物中的腐蚀因子,获取海底电缆路由海底腐蚀环境。 相似文献
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负荷传感全液压转向器与优先阀 总被引:1,自引:0,他引:1
负荷传感全液压转向器和优先阀是新型液压转向元件,它们由定量油泵、恒压变量油泵或负荷传感变量油泵(流量、压力联合补偿变量油泵)供油,组成各种负荷传感液压转向系统。图1~3表示由不同油源供油的三种负荷传感液压转向系统。这些系统具有以下优点: 相似文献
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该文介绍了采用PLC控制+触摸屏实现设定供油流量并使回油流量跟踪供油流量变化以达到供油和回油按设定液位自动平衡的方法. 相似文献
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EDA技术在高校实践教学中的应用 总被引:1,自引:0,他引:1
通过介绍正弦波波形合成器EDA仿真和对电子秒表电路的设计实例,结合电子电路仿真设计软件Multisim,阐述了EDA为分析电路和设计电路带来的明显优势。 相似文献
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Joško Valentinčič Mihael Junkar 《The International Journal of Advanced Manufacturing Technology》2007,33(7-8):698-705
To achieve a high removal rate and low electrode wear in a sinking electrical discharge machining process (EDM), rough machining
parameters have to be selected according to the size of the eroding surface. In general, the size of the eroding surface varies
according to the depth of the machining. Thus, it has to be determined on-line. This paper shows that the electric current
signal in the gap depends on the size of the eroding surface. The significance of the process attributes of the electric current
signal is established by inductive machine learning and the general decision rules are derived. The size of the eroding surface
can be detected on-line by monitoring and evaluating the electric current signal in the gap. 相似文献
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Joško Valentinčič Mihael Junkar 《The International Journal of Advanced Manufacturing Technology》2006,28(3-4):294-301
To achieve high removal rate and low electrode wear in sinking electrical discharge machining process (EDM), rough machining
parameters have to be selected according to the size of the eroding surface. In general, the size of the eroding surface varies
according to the depth of the machining. Thus, it has to be determined on-line. This paper shows that the electric current
signal in the gap depends on the size of the eroding surface. The significance of the process attributes of the electric current
signal is established by inductive machine learning and the general decision rules are derived. The size of the eroding surface
can be detected on-line by monitoring and evaluating the electric current signal in the gap. 相似文献
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对二甲苯芳烃联合装置吸附分离单元转阀自动控制系统工作情况、参数的调整,结合乌鲁木齐石化公司炼油厂年产百万吨案例进行分析,总结出此类控制运算在应用过程中出现的一些问题及相关解决方法。 相似文献
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简要介绍了中国履带起重机行业的现状,对履带起重机应力测试的必要性和重要性作了进一步的思考和探索,并说明应力测试在履带起重机行业中的作用和重要意义. 相似文献
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通过实际应用实例,系统的介绍MasterCAM软件的特点和实际应用方法,突出了MasterCAM软件数控编程的基本步骤和思路。 相似文献
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Rieppo J Hallikainen J Jurvelin JS Kiviranta I Helminen HJ Hyttinen MM 《Microscopy research and technique》2008,71(4):279-287
Polarized light microscopy is a traditional method for visualizing the collagen network architecture of articular cartilage. Articular cartilage repair and tissue engineering studies have raised new demands for techniques capable of quantitative characterization of the scar and repair tissues, including properties of the collagen network. Modern polarized light microscopy can be used to measure collagen fibril orientation, parallelism, and birefringence. New commercial instruments are computer controlled and the measurements are easy to perform. However, often the interpretation of results causes difficulties, even errors, because the theoretical aspects of the technique are demanding. The aim of this study was to describe the instrumentation and properties of a modern polarized light microscope, to point out some sources of error in the interpretation of the results, and to recall the theoretical background of the polarized light microscopy. 相似文献