基本的单极子天线由于其本身的特性会在天线内部对馈入的信号进行多次反射，严重制约着它的辐射性能。
According to the specific characteristics of monopole antenna, feeding signal may be multi reflected at the terminals, which could seriously damage the radiation characteristics.
深层地震反射资料分辨率、信噪比低是制约进一步提高深层勘探精度，加大深层勘探力度的重要因素。
Low resolution and low signal noise ratio are big obstacles in the way of increasing the accuracy and level of deep strata exploration.
从总的区域构造分布看，含煤盆地沉积主要受北东向反射弧的次一级断裂坳陷所制约，同时也存在着次一级的东西向与北东向复合交汇控制特征。
According to tectonic zonation, the coal basin mainly restricted by secondary fault depression of NE reflex arc, meanwhile secondary EW and NE composite convergence existed.
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