In this paper,we study the permanence of populations of a competing chemostat model in a polluted environment.Population control is also dealt with for the model without inter species competitionin.
讨论了污染

恒化器模型
永久
续生存性,当
群只有


时考虑了
群
控制问题。
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学毕业演讲 After spending decades studying how people deal with setbacks, psychologist Martin Seligman found that there are three P’s—personalization, pervasiveness, and permanence—that are critical to how we bounce back from hardship.
心理学家马丁•塞利格曼(Martin Seligman)研究几十年后发现,从苦难中振作起来关键是做到三点——不要过分自责(personalization)、不要过分解读( pervasiveness)以及不要以为伤痛
远不褪(permanence)。挺过生活中一次次打击,才能慢慢磨炼出韧性。
学毕业演讲