When excavating with parallel association rules, the two data distribution characters, data skewness and workload balance, will affect the validity of pruning.
在进行并行关联规则挖掘时，数据偏斜和工作量平衡这两个数据分布特征影响着剪枝的有效性。
The characters in the distribution and Seasonal cycle of arctic Sea ice are Simulated by this model using some climate data at arctic region.
取北极区大气和有关场的气候资料，由该模式模拟了北极海冰空间分布和季节变化循环特征。
Based on the observed data, the distribution characters of the air temperature, ground temperature, and temperature on two sides of an insulation layer in this tunnel, were analyzed.
根据实测资料，初步分析了昆仑山隧道洞内气温、地温及隔热层内外侧温度分布特征，得出的结论对多年冻土区隧道工程建设及冻害防治有一定的指导意义。
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