He also makes some initial inquiry into the High availability theory and analysis of the availability of the system in the article.

文中还对高可用系统理论作了初步探讨，对系统可用度进行了分析。

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A dynamic inspection cycle determining method based on risk and reliability theory is put forward and its availability is illustrated with cases.

提出了一种以风险及可靠性理论为基础的动态检测周期确定方法，并以实例说明其实用性。

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According to the queueing theory and Markov process theory, this paper made all the availability models and performance models of the supply chain system.

本文以排队理论和马尔可夫过程理论为基础，建立了该系统的可用性模型和性能模型。

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There is a controversial theory put forward by economist Steven Levitt that the increased availability of legal abortion after the Supreme Court ruling in 1973 on Roe v Wade meant that fewer children were born to young, poor, single mothers.

BBC: US crime figures: Why the drop?