平面机构中虚约束的存在，给制造加工和机构运动分析带来了诸多不便。

Virtual restraint in planar mechanism brings about many problems to machining and mechanism movement analysis.

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文中推导出了它在干扰边缘环境中虚警概率的解析表达式，分析了它抗边缘干扰的性能，并且与GO、OS和CA - CFAR检测器进行了比较。

We derive the analytic expressions of false alarm probabilities under clutter edge situation, analyse its performances against clutter edge, and compare it with the GO, OS and CA-CFAR detectors.

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该工具不仅可用于获得关于各种不同网格大小的建议，还可以用于收集一个已有的或计划中的(虚)索引的统计信息。

The tool cannot only be used to get Suggestions for the various grid sizes but also to collect statistics of an existing or planned (virtual) index.

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The virtual work of the reader does not involve surprise, does not involve the violation of expectations.

读者的虚功中没有惊讶，也没有期望的违背。

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