| 帧时隙ALOHA反碰撞算法仿真及数据分析 |
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| 引用本文： | 邓晓,何怡刚,陈洪云,谢涛. 帧时隙ALOHA反碰撞算法仿真及数据分析[J]. 汕头大学学报(自然科学版), 2008, 23(3): 58-62 |
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| 作者姓名： | 邓晓 何怡刚 陈洪云 谢涛 |
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| 作者单位： | 湖南大学电气与信息工程学院,湖南,长沙,410082 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划)，教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 用MATLAB模拟实际的无源标签反碰撞过程.设计了帧时隙ALOHA算法仿真及数据分析程序,对碰撞过程中的相关数据进行了统计分析,获得碰撞时隙中平均标签数目与碰撞时隙比例的关系,为动态调整帧长度,提高识别效率提供依据.
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| 关 键 词： | 射频识别 反碰撞 帧时隙ALOHA算法 |
Simulation and Data Analysis of Frame Slotted ALOHA Algorithm for Anti-collision in RFID Systems |
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| DENG Xiao,HE Yi-gang,CHEN Hong-yun,XIE Tao. Simulation and Data Analysis of Frame Slotted ALOHA Algorithm for Anti-collision in RFID Systems[J]. Journal of Shantou University(Natural Science Edition), 2008, 23(3): 58-62 |
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| Authors: | DENG Xiao HE Yi-gang CHEN Hong-yun XIE Tao |
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| Affiliation: | GUO Xi-kun, SUN Wen-bing, LIN Shu-dong (Department of Chemistry, College of Science, Shantou University, Shantou 515063, Guangdong, China) |
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| Abstract: | Low molecular weight（LMW） K-carrageenan with the number-average molecular weight of 10000 was achieved by depolymerizing natural K-carrageenan in mild hydrochloric acid condition, and then was turned into tetrabutylammonium salt. O-salicyloyl LMW κ-carrageenan was obtained by the salt modified with salicylic acid. The fine structure of O-salicyloyl LMW κ-carrageenan was characterized by 1H NMR, ^13C NMR, IR and UV. The results indicated that salicylic acid was reacted with the Hydroxyl groups on G45 6 of K-carrageenan and formed the O-salicyloyl LMW K-carrageenan. The degree of acylation was worked out to be 0.69. Meanwhile, modifying K-carrageenan with salicylic acid could improve its antioxidative activity in vitro. |
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| Keywords: | salicylic acid κ-carrageenan degree of acylation antioxidative activity |
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