动态增强MRA结合特殊的成像技术，可以一个步骤就可以快速获得最大程度的信息量。
Time-resolved contrast-enhanced MRA, which combines tomographic and projection imaging methods, is a fast way to obtain the maximum information very quickly during a single procedure.
运用约束条件的非线性规划，建立起一个基于效用最大化和合理性相结合的工程量清单费用分摊模型。
This paper establishes the expense separate model of bill of quantity based on maximizing the utility and rationality, by using the restriction of nonlinear programming.
结合工程实例，对井字梁配筋量、边梁配筋量、边梁扭矩值和弹性最大挠度值进行分析研究。
According to a example, reinforcement of grillage-shaped beam, reinforcement of boundary beam, torque of boundary beam and elastic flexility limit were analyzed.
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