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缓冲气缸缓冲特性建模与仿真 总被引:5,自引:0,他引:5
在对缓冲气缸运动过程分析的基础上,采用非线性微分方程组形式建立了缓冲气缸的非线性模型,并利用计算机仿真技术,对缓冲气缸在缓冲过程中缓冲腔的压力变化进行了仿真、分析,找到影响其特性的参数.这对了解缓冲气缸的全面性能、缓冲结构改型以及优化设计缓冲气缸系统提供了重要依据. 相似文献
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无线传感器网络是由具备传感、计算和通信能力的传感器节点组成的多跳自组织网络。定位技术是无线传感器网络的关键技术之一,大多数定位算法都以测距技术为基础。提出了一种基于距离优化的Voronoi图定位算法VB-DR。该算法利用Cayley-Menger行列式的几何应用对节点之间的距离关系进行限制,得到关于测距误差的约束方程并用以优化距离信息。仿真表明,VB-DR算法可以较好地修正测距误差,并解决经典的基于Voronoi图定位算法中存在的定位失败问题。 相似文献
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本文推导出绕赤道直径旋转的球形静压推力轴承考虑流体惯性效应的广义雷诺方程,并求其数值解,研究了流体惯性效应对该轴承的压力分布、承载能力和流量等工作性能的影响。 相似文献
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In wireless sensor networks (WSNs), appropriate topology control (TC) could efficiently balance the load among sensor nodes and extend network lifespan. Clustering is an effective topology control technique that could reduce energy consumption and provide scalability to WSNs. However, some clustering algorithms, including the traditional low energy adaptive clustering hierarchy (LEACH), don''t consider the residual energy and the communication distance. The energy consumption could dramatically increase in the case of long communication distance and high rate of control message exchange. In this paper we propose an energy-balanced clustering algorithm which considers the communication distance and the residual energy. Moreover the cluster head (CH) reselection is relevant to the current CH residual energy in order to reduce overheads. The simulation results demonstrate that the proposed algorithm prolongs the lifetime of the WSN in comparison to the LEACH and a hybrid clustering approach (HCA). 相似文献
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