The security grade of nuclear power station is high, so the performance demand on Instrumentation and Control System is also high.

核电站的安全等级高，因此其对于仪控系统的性能要求也很高。

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And value can confirm people -machine security grade of system effectively among them according to safe grade fuzzy characteristic amount.

根据安全等级模糊特征量及其中值可有效确定人—机系统的安全等级。

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Finally, combining the concrete example, USES this established model to safety evaluate, and adopts the fuzzy characteristic vector of safety grade to confirm the security grade.

最后结合具体实例，运用所建立的模型进行安全评价，采用安全等级模糊特征量确定应用实例的安全等级。

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Ready-made software, service providers as well as in-house solutions are now providing business-grade security to a significant amount of business data.

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"CDO" is a common term for collateralized debt obligation, an investment-grade security backed by a pool of bonds, loans and other assets.

FORBES: Magazine Article

New York lawmakers, for example, gave train and subway security a "D" grade, citing unprotected tunnels and rail yards and a lack of surveillance.

CNN: On alert on the rails