For example, the optimizer does not know the characteristics of the data unless you have run RUNSTATS to populate the catalog with relevant statistics.
例如，优化器不会知道数据的特点，除非运行RUNSTATS将相关统计数据填入目录。
We used the catalog of Earthquake Administration of Xinjiang and HYPODD to analyze the characteristics of focal depth and its tectonic significance in Urumqi region, Xinjiang.
采用新疆维吾尔自治区地震局精度较高的常规地震目录和双差定位目录，对乌鲁木齐地区震源深度的分布特征及与断层的关系进行了研究。
In this paper, the main sources of the errors in a meridian catalog, the characteristics of the equal altitude observation and the shortages of an equal altitude catalog are described.
本文叙述了子午星表系统误差的主要来源，等高观测的特点及等高星表的不足之处。
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