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为满足成纱质量要求,提高并条胶辊的内在质量,对普通并条胶辊及免处理胶辊胶料配方及性能进行了分析,并阐述了胶辊配方的设计方法与步骤.研究出新的免处理并条胶辊胶料配方:采用了NBR240S软胶,应用了导电氧化锌、白炭黑分散剂等新型加工助剂,并制定出合理的加工工艺,使生产的胶辊物理性能指标均高于设计要求.通过纺织厂实际生产试验,其纺纱质量高于普通胶辊,与进口免处理胶辊相当;且胶辊表面质量更加细致光滑,抗静电性能与进口胶辊相当,胶辊在纺织厂使用时表面处理溶剂(纺织涂料)的配比浓度较低,可降低涂料使用成本,且减少对人与环境的危害. 相似文献
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To achieve an optimal trade-off between video quality and energy efficiency in the uplink streaming of multi-user Scalable Video Coding (SVC) videos in relay-based Orthogonal Frequency Division Multiple Access (OFDMA) cellular networks, a cross-layer design framework that jointly selects the Transmission Policy (TP) for SVC video frames, assigns OFDMA subcarriers, and allocates power for each subcarrier is proposed. We apply the dual decomposition method to the problem, and obtain a TP selection subproblem for each SVC video adaptation and a resource allocation subproblem of Joint Subcarrier, Relay and Power Allocation (JSRPA). A second level of dual decomposition is used to divide the JSRPA problem into independent subcarrier subproblems. The proposed Crosslayer Trade-off Optimization (CTO) algorithm is sub-distributed with significantly low complexity. A performance evaluation with typical SVC video traces demonstrates that the proposed algorithm is able to converge and efficiently achieve the optimal trade-off between the video quality and energy consumption at the MSs for uplink SVC streaming. 相似文献
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针对无线传感器网络(WSN)数据不精确和不可靠的问题,根据感知数据的空间相关性定义了弹性空间模型,并在此基础上提出一种自适应近邻空间清洗方法(ANSA)。该方法根据感知数据波动动态调整近邻空间大小,并通过计算近邻节点测量数据的加权平均对本地数据清洗。实验结果表明,感知数据清洗后误差控制在0.5以内,与经典的加权移动平均(WMA)方法相比,所提方法的精确度更高,同时能量损耗减少约36%。 相似文献