神经胚（Neurula）：胚胎由原肠胚预定外胚层细胞形成中枢神经系统原基即神经管的过程称为神经胚形成(neurulation)，而正在进行神经管形成的胚胎称为...
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Through computer simulation, samples, BP algorithms and the influence of network structure neurula on model performance have been discussed as well as the improving measures.
通过计算机实验，讨论样本、学习算法和网络结构等对神经网络预测模型性能的影响及其改进措施。
It was found that differentiation of muscle cells from these stages showed evident differences, only till mid-neurula stage all of the explants developed into well differentiated muscle cells.
结果表明，这段期间预定肌节在离体培养条件下分化程度有明显差异，直到神经胚中期几乎所有组织块都分化为肌细胞。
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