We can use term frequency to have a weighted calculation and improve traditional text similarity calculation probability model in SVM algorithm.
通过利用基于词频的权值计算，同时改进传统文本相似度计算概率模型，改进SVM算法实现邮件过滤系统。
To gain better estimates of relative treatment effects in the presence of selective crossover, we used inverse probability of censoring weighted (IPCW) modeling.
采用逆概率删失加权分析(IPCW)模型以更好地评估转换治疗的相对治疗效果。
Moreover, under the situation of uncertainties in large historical flood, the quantities estimated by probability weighted moments may be more robust than those by a optimal curve fitting method.
在历史洪水存在不确定性情况下，以概率权重矩法估计的参数稳健性优于优化适线法。
It is considered difficult to analytically prove whether sample probability weighted moments with discrete series are unbiased estimators.
人们普遍认为要从理论上通过数学分析的方法来论证不连序系列样本概率权重矩的偏倚性是很困难的。
The relative risk of in-hospital mortality when the four later periods were compared with the earliest one was estimated with inverse probability of treatment-weighted analysis.
以治疗级别的逆概率计算后4个时段与第一个时段的住院死亡率的相对危险度。
The relative risk of in-hospital mortality when the four later periods were compared with the earliest one was estimated with inverse probability of treatment-weighted analysis.
以治疗级别的逆概率计算后4个时段与第一个时段的住院死亡率的相对危险度。
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