The new growth theory represented by Romer has reflected relation between the economical growth and the technology advancement under the definite condition.
罗默等人为代表的新增长理论，反映了确定性条件下经济增长和技术进步之间的联系。
In view of the hydrodynamic complexity of the wellbore, the definite condition of the model has been discussed, and the numerical solution has been presented.
针对井内水动力体系的复杂特点，讨论了模型的定解条件，并对模型进行了数值求解。
According to the definite condition, the paper USES the theorem of supremum and infimum to study characteristic of mapping function and get its important law of the mapping.
运用上确界与下确界存在定理，在一定条件下，研究了连续函数的映射特点，得到一个连续函数所独有的映射规律。
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