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传统光纤光栅传感网络具有灵活性低、移动性差等缺点.提出采用无线通信方式进行数据传输,构建一个新型的光纤光栅无线传感网络.设计了该传感网络的MAC层协议-FG-MAC(Fiber Grating Media Access Control)协议,并与IEEE 802.11协议在时延、吞吐量和能耗三方面进行了比较分析,结果显示FG-MAC协议更适合该新型传感网络.Abstract: The conventional fiber grating sensor network is poor in flexibility, mobility, etc. A novel fiber grating sensor networks is introduced, which is based on wireless data transmission. The FCr-MAC protocol (Fiber Grating Media Access Control) in MAC layer is designed, and is compared with IEEE 802.11 protocol in time delay, throughput, energy consumption. The results indicates FG-MAC protocol is more suitable for the novel fiber grating sensor networks. 相似文献
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文章分析了湖南省水利水电物资流通的发展历程与现状,并针对经营工作中存在的问题,提出发展水利水电物资流通的新思路。 相似文献
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The goal of Optoelectronics Letters is to rapidly report original, new and important results in the fields of photonics and optoelectronics in English, to advance the international academic exchanges. Optoelectronics Letters pays a particularly attention to the cross topics between photonics and electronics. 相似文献
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Due to the encephalic tissues are highly irregular, three-dimensional (3D) modeling of brain always leads to compli- cated computing. In this paper, we explore an efficient method for brain surface reconstruction from magnetic reso- nance (MR) images of head, which is helpful to surgery planning and tumor localization. A heuristic algorithm is pro- posed foi" surface triangle mesh generation with preserved features, and the diagonal length is regarded as the heuristic information to optimize the shape of triangle. The experimental results show that our approach not only reduces the computational complexity, but also completes 3D visualization with good quality. 相似文献
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利用光纤偏振分束器和保偏光纤的传感解调系统 总被引:1,自引:0,他引:1
提出了一种利用光纤偏振分束器(PBS)和保偏光纤(PMF)中偏振模间干涉原理实现光纤布拉格光栅波长解调的方案,以提高光纤光栅传感解调系统的解调精度和稳定性。运用矩阵光学原理建立了数学分析模型,由此给出了系统输出信号与光纤光栅布拉格波长之间的关系。通过仿真分析,研究了保偏光纤长度、输入光相对于保偏光纤主轴的偏振角度和光纤偏振分束器主轴方位对系统输出信号的影响,明确提出了提高系统灵敏度的方法。根据设计方案搭建了实验系统,并进行了实验验证。结果表明:该设计方案可行,系统的波长分辨率1pm,测量精度1pm,温度可测量范围为90℃。该系统测量精度高,其稳定性优于利用M-Z型干涉仪的解调装置。 相似文献
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我厂开发研制的毛型牙签呢,于1988年11月研制成功,同年被评为市新产品一等奖。1990年8月被评为省优质产品。9月参加上海纺织品市场评选,被国家商业协会评为金织奖。我们利用中长工艺路线,采用毛织物组织,充分发挥涤纶低弹网络丝的强力高,膨松度和卷曲度好的特点,增加产品的仿毛感。采用270D网络丝与15×2中长纱线,按组织花型相间排列,适当减少经纬密,利用网络丝和中长纱的异经,代替毛织物的正反捻纱的排列 相似文献
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