The aim of this work is to determine the porosity of concrete by means of two NDT （non-destructive testing） using digital images. In one test, the images were obtained through X-ray microtomography and for another t...The aim of this work is to determine the porosity of concrete by means of two NDT （non-destructive testing） using digital images. In one test, the images were obtained through X-ray microtomography and for another test via digital scanner. In both of the tests, the images were processed using techniques of mathematical morphology and pixel processing. For both NDT, it was used concrete samples with 20-30 MPa of compressive strength. The results for the porosity were compared with results obtained by the standard test proposed by NBR （Norma Brasileira） 9778 （2005） showing the compatibility between two studied methods and pattern method.展开更多
以前，我们认识事物的渠道很少，但我们能满足于这些有限的知识。现在，我们认识事物的渠道多了。但如果从堆积如山的信息中筛选出自己所需的。却是一件让人头痛的事。目前。我们知道iPhone有三十多万个应用程序，Android有十五万个软...以前，我们认识事物的渠道很少，但我们能满足于这些有限的知识。现在，我们认识事物的渠道多了。但如果从堆积如山的信息中筛选出自己所需的。却是一件让人头痛的事。目前。我们知道iPhone有三十多万个应用程序，Android有十五万个软件……于是。我们在这座软件山中里越发迷惘——同类软件中，谁更适合自己，在你没用过之前。谁也不能帮你下定论，大浪淘沙。终得Top10App of 2010。玩软件，淘商店，今天开始不彷徨。展开更多
文摘The aim of this work is to determine the porosity of concrete by means of two NDT （non-destructive testing） using digital images. In one test, the images were obtained through X-ray microtomography and for another test via digital scanner. In both of the tests, the images were processed using techniques of mathematical morphology and pixel processing. For both NDT, it was used concrete samples with 20-30 MPa of compressive strength. The results for the porosity were compared with results obtained by the standard test proposed by NBR （Norma Brasileira） 9778 （2005） showing the compatibility between two studied methods and pattern method.
文摘以前，我们认识事物的渠道很少，但我们能满足于这些有限的知识。现在，我们认识事物的渠道多了。但如果从堆积如山的信息中筛选出自己所需的。却是一件让人头痛的事。目前。我们知道iPhone有三十多万个应用程序，Android有十五万个软件……于是。我们在这座软件山中里越发迷惘——同类软件中，谁更适合自己，在你没用过之前。谁也不能帮你下定论，大浪淘沙。终得Top10App of 2010。玩软件，淘商店，今天开始不彷徨。
