| 数据广播中数据项访问概率的准确检测 |
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| 引用本文： | 谷志奇,余松煜. 数据广播中数据项访问概率的准确检测[J]. 上海交通大学学报, 2005, 39(8): 1300-1303 |
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| 作者姓名： | 谷志奇 余松煜 |
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| 作者单位： | 上海交通大学,图像通信与信息处理研究所,上海,200030;上海交通大学,图像通信与信息处理研究所,上海,200030 |
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| 摘 要： | 基于Stathatos等提出的广播丢失（broadcast misses）技术，结合Yu等关于数据项播发频率对广播丢失的影响的研究，提出了使用矩估计和平周期作为检测周期测量各数据项访问概率的方法。该方法避免了Stathatos的复杂的双离合（double—clutch）机制，同时也避免了Yu方法中复杂的推导，具有更广泛的适用性。
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| 关 键 词： | 数据广播 访问概率 平周期 广播丢失 |
| 文章编号： | 1006-2467(2005)08-1300-04 |
| 收稿时间： | 2004-07-28 |
| 修稿时间： | 2004-07-28 |
Probing Data Access Probabilities with Flat Broadcast Cycle in Data Broadcasting |
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| GU Zhi-qi,YU Song-yu. Probing Data Access Probabilities with Flat Broadcast Cycle in Data Broadcasting[J]. Journal of Shanghai Jiaotong University, 2005, 39(8): 1300-1303 |
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| Authors: | GU Zhi-qi YU Song-yu |
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| Abstract: | Based on the broadcast misses technique proposed by Stathatos et al and the research by Yu et al on the broadcast frequencies' influence to the broadcast misses, this paper proposed to use moment estimation and flat broadcast cycle as the probing cycle to measure the access probabilities of each data item. The method avoids the complex double-clutch mechanism in Stathatos et al's method and the complicated deduction in Yu et al's scheme. Moreover, it is applicable in more situations. |
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| Keywords: | data broadcasting access frequency flat broadcast cycle broadcast misses |
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