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随着智能网VPMN业务的飞速发展,为迎合移动客户多样化的求,通了跨省虚拟集团客户业务(即跨省V网业务),使得订购跨省集团客户的用户在同跨省集团内(即全国范围同虚拟集团网内),无论省内漫游或是省际漫游,均可以通过拨打真实号码方式或是使用原来的省内VPMN业务的短号码方式进行通话,并且可以享受到更加优惠的资费。跨省集团客户业务的发展连同综合V网同实现了VPMN业务的大融合。文章针对实现跨省集团客户业务的具体关键点以及业务优化关键点进行了阐述。 相似文献
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溶剂法回收玻璃纤维/环氧复合材料的试验研究 总被引:1,自引:0,他引:1
为了解决现有化学回收法技术不适用于热固化体系的问题,采用溶剂法从玻璃纤维/环氧复合材料成功回收了玻璃纤维.在90℃的8mol/L分解液作用下,12h即可将复合材料中的环氧树脂基体分解为低分子含苯环有机物,回收到外观清洁的玻璃纤维.当分解温度为90℃,酸液浓度为8mol/L,投料比为6g:100mL时,回收纤维的单丝拉伸强度损失为5.2%.以分解时间、回收纤维强度损失为考查指标,利用正交实验法对分解条件进行优化,得到各因素的影响次序:浓度为最重要因素、温度次之、投料比影响最小. 相似文献
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前苏联纤维复合材料的研究状况本文回顾了前苏联1982~1992年间,碳/碳、碳/金属、陶瓷/陶瓷复合材料及其制造技术。主要引用的文摘包括:苏联文摘杂志、化学文摘、工程索引、工程材料文摘、陶瓷文摘、世界陶瓷文摘和先进材料文摘。1.碳/碳复合材料1988... 相似文献
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The thermal stability of latent resin systems, cycloaliphatic epoxy/4,4??-dihydroxydiphenylsulfone/aluminum complexes, was investigated by dynamic differential scanning calorimetry (DSC) analysis. Experiments were conducted under non-isothermal condition in a nitrogen atmosphere at the heating rate of 10, 20, 30 and 40 °C/min, respectively. TG curves showed that, in the temperature range of 25 to 600 °C, the stability of the resin systems could be enhanced by increasing the length of the aliphatic chain in the initiator. Both the Kissinger method and the Ozawa-Flynn-Wall method were employed to calculate activation energies of the decomposition reaction, and the values obtained from the two methods were compared. Moreover, the corresponding reaction mechanism was identified by the Achar differential method and the Coats-Redfern integral method. The experimental results showed that these four methods were reliable and effective to study the kinetics of the thermal decomposition reaction; and the most probable thermal decomposition mechanism of the resin systems we proposed was found to comply with Mampel power law (m=1). 相似文献
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