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环氧浇注体内应力的研究 总被引:1,自引:0,他引:1
本文采用应变片铝环法测量各种环氧体系的内应力,着重研究了填料的填入量,偶联剂的用量及偶联剂处理填料的不同处理条件对环氧体系内应力的影响。所采用的降低内应力各种方法,具有重要的现实意义。 相似文献
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Private clouds and public clouds are turning mutually into the open integrated cloud computing environment, which can aggregate and utilize WAN and LAN networks computing, storage, information and other hardware and software resources sufficiently, but also bring a series of security, reliability and credibility problems. To solve these problems, a novel secure-agent-based trustworthy virtual private cloud model named SATVPC was proposed for the integrated and open cloud computing environment. Through the introduction of secure-agent technology, SATVPC provides an independent, safe and trustworthy computing virtual private platform for multi-tenant systems. In order to meet the needs of the credibility of SATVPC and mandate the trust relationship between each task execution agent and task executor node suitable for their security policies, a new dynamic composite credibility evaluation mechanism was presented, including the credit index computing algorithm and the credibility differentiation strategy. The experimental system shows that SATVPC and the credibility evaluation mechanism can ensure the security of open computing environments with feasibility. Experimental results and performance analysis also show that the credit indexes computing algorithm can evaluate the credibilities of task execution agents and task executor nodes quantitatively, correctly and operationally. 相似文献
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本文采用DMA仪、TR-10C等仪器测试了环氧-NA体系的力学、热、电性能。结果表明,加入适量的“海岛结构”增韧剂,不仅不影响体系的热性能,还能改善体系的韧性,提高固化物的力学强度,并且在常温下,ε几乎没有改变,是一种有效的增韧剂。 相似文献
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本文针对环氧云母绝缘材料在后固化过程中交联度不变,但介质损耗却能大大降低这一问题,采用TSC法,测量了不同模压时间与不同后处理时间的试样的内部电荷的变化情况,从内部结构来说明损耗降低机理。同时,测量了该材料的电导-温度谱,并对自发电流的现象做了初步的分析。 相似文献
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基于指纹的RFID室内定位技术,由于其定位精度高、普适性强等优点受到国内外学者的广泛关注。但因为其计算量较大,在实际应用仍然非常有限。提出基于实际应用场景的Kmeans和Weighted K-Nearest Neighbor(WKNN)联合的定位方法,将指纹地图通过聚类算法分成块,先初步确认待测点所属指纹块,在块的基础上定位,这样可以减小误差累计。仿真结果表明,该方法在保证适当定位精度的同时,也减少了计算量和在线定位时间。 相似文献