The distribution of the seepage lines and isopotential line ( isobaric lines) is reason-able and regular. 自由水面线、等水头线以及等压线的分布情况都是合理的,具有良好的规律性。
The appropriate shape of the bulge-blank is obtained through the reverse educing method, which is based on the minimum energy theory and the minimum resistance pressure theory, and utilize the similarity between the blank flow law and the isopotential line of the electrostatic field. 该方法基于能量最小原理和最小阻力原理,利用塑性变形过程中坯料的流动规律类似于静电场等势线所描述的结果这一特性,来反推胀形时的成形坯料。
After exercising, ST-segment of 28 patients ( 82.3%) depressed to isopotential line, all of them recovered in ten minutes. 82.3%的病例于运动后即刻使抬高的ST段回到等电位线,10分钟后又全部恢复到原抬高状态。