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1.The theoretical bases of the article are difficult to follow because they are written just citing the literature sources of the different algorithms used in the work without explaining in an articulated way what they are about, how they are used and, above all, why they are used with corrosion data.ÎÄÕµÄÀíÂÛ»ù´¡ºÜÄÑÀí½â£¬ÒòΪËüÃÇÖ»ÊÇÒýÓÃÁ˹¤×÷ÖÐʹÓõIJ»Í¬Ëã·¨µÄÎÄÏ×À´Ô´£¬¶øÃ»ÓÐÒÔÇåÎúµÄ·½Ê½½âÊÍËüÃǵĺ¬Òå¡¢ËüÃǵÄʹÓ÷½Ê½ÒÔ¼°×îÖØÒªµÄ£¬ÎªÊ²Ã´ËüÃÇÓÃÓÚ¸¯Ê´Êý¾Ý¡£
2.Also, from the explanations given in the manuscript it would be impossible to reproduce the procedures proposed, should someone other than the authors wanted to do it. For example, the authors talk about ¡°features¡±, without explaining what they mean. Are they corrosion defect depths or areas? Or perhaps remaining pipeline thickness? Or are they referencing pipeline/environment parameters that determine the corrosion rate? This is what one would assume when seeing the initials in Figure 2, in which, by the way, there are no explanations either.´ËÍ⣬´ÓÊÖ¸åÖиø³öµÄ½âÊÍÀ´¿´£¬Èç¹û×÷ÕßÒÔÍâµÄÈËÏëÕâÑù×ö£¬¾Í²»¿ÉÄÜÖØÏÖËùÌá³öµÄ³ÌÐò¡£ÀýÈ磬×÷Õß̸µ½¡°ÌØÕ÷¡±£¬µ«Ã»ÓнâÊÍËüÃǵĺ¬Òå¡£ËüÃÇÊǸ¯Ê´È±ÏݵÄÉî¶È»¹ÊÇÃæ»ý£¿»òÕßÊÇÊ£ÓàµÄ¹ÜµÀºñ¶È£¿»òÕßËüÃÇÊÇÖ¸¾ö¶¨¸¯Ê´ËÙÂʵĹܵÀ/»·¾³²ÎÊý£¿ÕâÊÇÈËÃÇÔÚ¿´µ½Í¼ 2 ÖеÄÊ××Öĸʱ»á¼ÙÉèµÄ£¬Ë³±ã˵һ¾ä£¬ÆäÖÐҲûÓÐÈκνâÊÍ¡£

3.Later on, in Section 4.2.1, the authors finally talk briefly about specific calculations, using data that were collected elsewhere, not by the authors themselves. On page 4, line 45, it is stated: ¡°The output data of the ELM is the corrosion rate of the pipeline¡±.
This is where the central question appears. What corrosion rate do the authors use to validate the algorithms? A lot of articles have been written trying to develop methods and models to estimate the rate of corrosion in pipelines, and that remains an open topic. Everything seems to indicate that the authors calculate the corrosion rate as the simple division of the maximum depth of the localized corrosion defects by the reported in [30] service time of the pipelines. This would give a simplistic value of dubious usefulness since localized corrosion does not necessarily begin immediately after the installation of the ducts, given that they are coated and cathodically protected. Not to mention that the linear model of corrosion defects growth has been repeatedly questioned and there is agreement in at least part of the community that it does not work to provide a correct description of the progress of localized corrosion in pipelines.
So if the corrosion rate data used to validate the algorithms are not reliable, the conclusions obtained in this work are misleading at best.ºóÀ´£¬ÔÚµÚ 4.2.1 ½ÚÖУ¬×÷ÕßÖÕÓÚ¼òÒªÌÖÂÛÁ˾ßÌåµÄ¼ÆË㣬ʹÓõÄÊý¾ÝÊÇ´ÓÆäËûµØ·½ÊÕ¼¯µÄ£¬¶ø²»ÊÇ×÷Õß×Ô¼ºÊÕ¼¯µÄ¡£ÔÚµÚ 4 Ò³µÚ 45 ÐУ¬ËüÖ¸³ö£º¡°ELM µÄÊä³öÊý¾ÝÊǹܵÀµÄ¸¯Ê´ËÙÂÊ¡±¡£
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