In chapter four,based on the model of above chapter,we consider the new model,in which the thinning process is considered,using the similar method in chapter three,we get the integral representation of survival probability and so on.
第四章在前一章双险种风险模型的基础上,将稀疏过程考虑在内,对其进行研究,用与第三章类似的方法得到了其最终生存概率所满足的积分方程等。
参考来源 - 保费随机的风险模型及双险种风险模型的破产问题研究·2,447,543篇论文数据，部分数据来源于NoteExpress
经实测资料验证，笔者提出的模型在拟合光皮桦种群自然稀疏过程中，均具有较高的可信度。
According to the verified data, the model presented in this paper characterizes its higher credibility in the process of natural thinning of Betla Luminifera population.
该矩阵由于其构成的非常稀疏性大大简化了图像重建过程中的投影计算，从而提高重建速度。
Owing to its sparsity of structure, new matrix greatly simplifies the projection operation during images reconstruction, which greatly improving the speed of reconstruction.
并分别对密集模式组播路由协议的扩散和剪枝机制、稀疏模式组播路由协议中的RPT树到SPT树的切换过程进行了详细的探讨。
In this thesis, we also discuss the mechanism of Flooding and Pruning in Dense-Mode multicast routing protocol and the process of switch from RPT to SPT in Sparse-Mode routing protocol.
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