convergent adaptation是什么意思 convergent adaptation在线中文翻译

convergent adaptation

convergent adaptation 双语例句

1. The same life form, vegetative reproduction strategy and similar age structure of Scirpus planiculmis or Carex kirganica were due to the long time convergent adaptation.
   紧穗三棱草和长秆苔草相同的生活型、相似的种群年龄结构和无性繁殖方式是对湿地生境长期趋同适应产生的结果。
2. Being aimed at the main defects of slowly learning convergent velocity of the BP neural network, lots of improved plans such as improving excitation function, improving error function, improving general error, the self-adaptation adjustment of learning factor and inertial factor, the combination of the gradient method and the direct searching method, general optimization, non-linear optimization, and topology correcting algorithm are classified and summarized beased on the principles of the improvements.
   针对BP网络的学习收敛速度慢这一主要缺陷，对改进激励函数、改进误差函数、改进一般化误差、学习因子和惯性因子的自适应调整、梯度下降法与直接搜索法相结合、全局优化、非线性优化、拓仆修正算法等多种改进方案按改进原理进行了分类综述，并在此基础上，通过解决XOR问题的仿真实验对部分改进方案进行实验性评价，分析说明了它们的优劣和特点。
3. However, as already indicated by the distinctness of these two, their morphology seems to be a convergent adaptation.
   然而，正如已经表明，由特异性这两个，其形态似乎是一个收敛的适应。

convergent adaptation