光纤复合架空地线

光纤复合架空地线是电力系统发展应用的一种独特通信地线,它是把光纤维通信和输电线路的架空地线复合为一体的综合电缆,既可避雷又可通信,可随输电线路同时设计施工建设,不仅节省投资,而且应用安全可靠。文章介绍了光纤复合架空地线在国内外发展应用及其主要结构形式。     

含间位联苯聚芳醚酮结晶熔融行为

含间位联苯聚芳醚酮玻璃态结晶是两步结晶过程。第一步结晶发生在玻璃化转变温度和２５５℃之间,是一个慢性结晶过程,且与聚合物的分子量密切相关,所形砀晶体规整度差。第二步结晶发生在２５５℃和熔点之间,是一个快结晶过程。     

Improvement of Linear Model of Plasma Filled Dielectric Cerenkov Maser

The plasma filled dielectric Cerenkov maser considering the effect of the plasma grating has been studied. The plasma grating is formed by the modulation of the strong fields. According to the plasma-grating model, An equivalent model is constructed. The modified dispersion relation has been derived .The numerical results show that when the modulation over the background plasma increases, the operation frequency also increases, however, the growth rate varies slightly. Compared with the calculation results obtained by treating the plasma as uniform fluids, the calculation results with the equivalent model describe the bounded bandwidth of the dielectric oscillator more precisely.     

加氢装置PV8505调压阀腐蚀调查

分析了PV8505调压阀产生严重冲刷腐蚀而失效的原因,并提出了相应的改造措施.     

标准化工作在国产化过程中的重要作用

阐述海洋石油工业国产化工作中执行标准化的重要意义,指明国产化过程中执行标准化工作的实质内容。标准化是国产化工作质量的保证,是推行国产化取得成功并产生效益的一个必要条件。实践证明,国产化过程中,非标准作业对企业的经济利益和市场信誉有很大的危害。     

浅谈东胜南部矿区铁合金专用焦的发展

介绍了东胜南部矿区煤炭的质量优势,阐述了利用这种天然精煤发展铁合金专用焦具有重要意义,提出了目前当地生产铁合金专用焦的首选工艺是简易机焦炉。     

Automotive seat vibration control via hydraulic semiactive vibration absorbers (SAVA)

The paper examines the ride performance enhancement that can be obtained by applying hydraulic semiactive vibration absorbers (SAVA) to alter the compliance characteristics of the seat/wheel suspension system. The work relies on a consistent model of the (nonlinear) hydraulics of the SAVA. A recently developed Lyapunov control scheme is used for regulation. The performance is examined assuming a quarter car with a seat/seat mounted mass. The paper then employs a quarter car/seat with a two mass ISO model of the seated human. Two road conditions are employed in the simulations; a ride swell and a road surface with a white noise velocity profile. The results show 45% reduction of of the vertical acceleration.     

Fluorescence Enhancem ent by Gadoliniu m ( Ⅲ) for Com plex of Europiu m ( Ⅲ) with T T Aand T S Aand its Analytical Application

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气门热精锻模具新材料新技术与系统工程

本文介绍了提高气门热精锻具工作寿命的赤道新技术,并以系统工程的原理实步探讨了模具材料、热处理表面技术、结构设计、制造加工、冷却、润滑和毛坯前处理等与气门模的工作寿命,经济性、经营管理和可持续发展等方面的关系。     

金属设备中原子氢浓度的原位无损检测技术的研究

研制了一种检测渗透到金属设备中的原子氢浓度的探测仪,该探测仪的渗氢电流测量范围为0～400～4000μA.在40OμA,仪器自动切换量程.在400μA以下的量程段,仪器的分辨力为0.1μA.渗氢电流信号的测量精度为±1%.传感器的背景电流相似文献