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arXiv 1302.6818cs.AI
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数值概率推理与定性概率推理的实验比较

An Experimental Comparison of Numerical and Qualitative Probabilistic Reasoning

Institute for Decision Systems Research(决策系统研究所);Stanford University(斯坦福大学)

Max Henrion, Gregory M. Provan, Brendan del Favero, Gillian Sanders

摘要:

定性和无穷小概率方案与概率论的公理一致,但避免了对精确数值概率的需要。使用定性概率可以大大减少知识工程的工作量,提高结果的鲁棒性。我们实验研究如何以及无穷小的概率(kappa演算的Goldszeland和珍珠)执行诊断任务-故障排除的汽车,将无法启动与传统的数值信念网络比较。我们发现,在识别真正的故障的无穷小方案是一样好的数值方案。无穷小方案的性能显着的先验故障概率大于0.03。这些结果表明,无穷小概率方法可能是具有很大的实用价值的机器诊断与小的先验故障概率。

英文摘要:

Qualitative and infinitesimal probability schemes are consistent with the axioms of probability theory, but avoid the need for precise numerical probabilities. Using qualitative probabilities could substantially reduce the effort for knowledge engineering and improve the robustness of results. We examine experimentally how well infinitesimal probabilities (the kappa-calculus of Goldszmidt and Pearl) perform a diagnostic task - troubleshooting a car that will not start by comparison with a conventional numerical belief network. We found the infinitesimal scheme to be as good as the numerical scheme in identifying the true fault. The performance of the infinitesimal scheme worsens significantly for prior fault probabilities greater than 0.03. These results suggest that infinitesimal probability methods may be of substantial practical value for machine diagnosis with small prior fault probabilities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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