中国大鲵小肠电和小肠运动的神经控制

Form and model of symbolic constitution elements of maps

以小肠电和小肠纵肌张力为指标，通过观察经典神经递质及其阻断剂的效应，探讨了中国大鲵小肠电和小肠运动的神经调节机制．

The paper advances the symbolic constitution elements of maps,such as position,form,hue,size,texture,direction and notation, and sum up its designing models as selection,cooperation,coverture,strengthening,weakening,extension and condensing.It has a very important practical significance to increase designing level of thematic mapping.