该模型满足GEV定理，给出了市场占有率、即产品选择概率的估计、评价和分析方法。
The market share or the choice probability is evaluated by using the approaches from the GEV theorem.
组合恒等式在组合数学中占有重要的地位，它有多种证法，运用集合论的观点，求导法则和概率方法对几个重要的组合等式给出了直观简洁的证明。
This paper USES the set theory, derivation principles and probability method to give a direct and simple solution to several important combinatorial identities.
随机变量的分布函数及其反函数在概率论中占有重要地位。
Random variable distribution functions and their inverse functions take an important role in probability theory.
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