Compared with the ago stochastic model, this solution is simpler.

与以往的随机模型相比, 求解大为简化.

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Finally we conclude that when wis small, the improved stochastic model is better than original one.

得出了w值在较小的情况下使得改进后的持续期模型优于原模型.

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A general framework of stochastic model a multitype branching random walk in random environments is introduced.

引进了随机环境中多物种分枝随机游动的一般模型.

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