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Because of the difference between the spatial property of the slope and the cavity, different cut arithmetic are adopted, algebraic operation between digital elevation model for the slope and section incision method for the cavity.
对于出露于地表的工程,诸如边坡、基坑等,采用多层DEM的代数运算方法;对于镶嵌于地下的工程,诸如隧道、洞室等,则采用斜切剖面的方法。
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The basic principle is that basic geometry shape of openings in the photo is revised; the image can't be distortion by use of projection reconstruction; the corrected image is exerted by open operation and close operation of gray-image; the shape of openings is gained lastly. The perimeter borderline of openings shape is extracted. The quantity of overbreak as well as underbreak is gained by comparing to extracted perimeter and designed perimeter. The same method is applied to other opening sections. Evaluation of overbreak as well as underbreak in the openings can be easily solved in the way of quantitative.
其基本原理是:对野外摄取的洞室的基本剖面形状进行几何校正,然后应用图像学中的投影重建方法使图像不失真,对修正后的图像实行灰度图像的开操作和闭操作运算,得到洞室的基本形状,然后用图像学中的边界提取技术提取洞室的周边界,与洞室的设计形状对比分析,得到洞室在该断面上的超欠挖方量,然后对其它断面采用同样的技术就可评价某一段或整个洞室的超欠挖数量,从定量的角度解决了工程中的超欠挖评价问题。
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compensated ionization chamber:补偿游离室
补偿感应电动机;补偿感应马达 compensated induction motor | 补偿游离室 compensated ionization chamber | 补偿运算放大器 compensated operational amplifier