Based on the principle of the dual simplex method about linear programming, the changes of the value of the objective function in iterations have been studied.
运用求解线性规划对偶单纯形算法原理，进一步研究迭代过程中目标函数的变化。
Objective Using dual nuclide renal dynamic imaging to evaluate renal function.
目的探讨双核素肾动态显像对肾功能的评价。
Objective To evaluate left ventricular systolic function in patients with dual-chamber pacing by ultrasonic speckle tracking imaging.
目的探讨超声斑点跟踪显像技术评价房室顺序起搏患者左心室收缩功能的价值。
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