证明估计的强相合性和渐近正态性，给出似然比检验统计量的极限分布，并讨论基于精确分布的检验问题。
The limit distributions of estimators and likelihood ratio test are given, the strong consistency of estimators is also proved.
渐开线花键在近跟处有最大的强度，(键齿)能精确分布和自定心，这样就有相同的支撑力和应力，同时能准确地配合和测量。
Involute splines have maximum strength at the base, can be accurately spaced and are self-centering, thus equalizing the bearing and stresses, and they can be measured and fitted accurately.
它一直在尝试建立监测站，以生成精确至分钟的室外空气污染分布图。
It has been trying out monitoring stations that are intended to yield minute-to-minute maps of outdoor air pollution.
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