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lvkai1994: ½ð±Ò+200, ·ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2016-05-11 20:05:52
lvkai1994: ½ð±Ò+200, ·ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2016-05-11 20:05:52
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Èç½ñ ÎÒ¹úũҵ·¢Õ¹ ÃæÁÙ×Å ¸ßͶÈë¡¢µÍ²ú³ö¡¢µÍÐ§Òæ¡¢×ÊÔ´¸ßÏûºÄ ºÍ ¹ý¶ÈÀûÓá¢Éú̬ÍË»¯¡¢»·¾³¶ñ»¯ µÈ ÑϾþÎÊÌ⡣ũҵ×ÊÔ´ÀË·Ñ Óë »·¾³ÎÊÌâÆÆ»µ ÒѾ³ÉΪ ÖÆÔ¼ ¿É³ÖÐø·¢Õ¹µÄ Æ¿¾±ÎÊÌâ¡£ÏÖ´ú Å©ÒµÔ°Çø ÊÇÉÏÊöÎÊÌâµÄ ÖØÒªÍ¾¾¶¡£ÔÚÏÖ´úÅ©ÒµÔ°Çø ÉÐδ ÆÕ¼°µÄµØÇø£¬´Ó Ñ»·¾¼ÃµÄ ÀíÄî½Ç¶È ³ö·¢ ½øÐÐ ÏÖ´úÅ©ÒµÔ°Çø ѡַ£¬½¨Á¢ Ò»¶¨ÊýÁ¿µÄ ʾ·¶µã ÊÇÏ൱ÓбØÒªµÄ¡£Òò´Ë£¬Ê¾·¶µãµÄѡȡ ±ã³ÉΪ ´ý½â¾ö ÎÊÌâÖ®Ò»¡£ At present, China agriculture development is challenged by problems such as high investment, low output, low efficiency, large resource consumption, ecological degradation, and environmental degradation. Agricultural resource waste and environmental destruction have become bottleneck problem which constrain agricultural sustainable development. In regions where the concept of modern agricultural park has not be popularized, it is necessary to select sites for building modern agricultural parks in the perspective of circular economy and build certain amount of exemplary bases. Therefore,selection of exemplary base becomes a key problem to be solved. ±¾ÎÄÔÚ¶Ô ¿Õ¼äÓÅ»¯ ѡַģÐÍ ÓÅȱµã ÊáÀíµÄ »ù´¡ÉÏ£¬½Ó×Å Õë¶Ô ºòÑ¡µã ¸²¸Ç·¶Î§ ¿ÉÄÜ»á Ïà»¥ÖØµþ£¬Ã¿×é ºòÑ¡µã ¸²¸Ç·¶Î§ ¾ù²»Ò»Ñù£¬µ± ºòÑ¡µã ½Ï¶àʱ£¬ºòÑ¡·½°¸×ÜÊý »áÒÔ Ö¸ÊýʽÔö³¤£¬±¾ÎÄ ²ÉÓà ÒÅ´«Ëã·¨ ÒÔ¿ìËÙѡȡ ÆäÖÐ×î¼Ñ·½°¸¡£²ÉÓà GISµÄʸÁ¿·ÖÎö£¬¸ù¾Ý ÒÅ´«Ëã·¨ ºÍ ²ã´Î·ÖÎö·¨µÄ ÌØµã£¬½¨Á¢ÁË AHP-GAÄ£ÐÍ¡£²¢ÒÔ ¹ã¶«Ê¡·ðɽÊÐ ¸ßÃ÷Çø ÑîºÍÕòΪÀý£¬½áºÏ ¸ûµØµÄ ×ÔÈ»µÈÌØµã Éè¼ÆÁË ´ÖÂÔ ¸ûµØÁ¬Æ¬¶È ¼ÆËãµÄ·½·¨£¬¹¹½¨³ö Ò»¸ö »ùÓÚ ²ã´Î·ÖÎö·¨µÄ ÒÅ´«Ëã·¨µÄ ÍÁ¹æ»®¾ö²ßÄ£ÐÍ¡£¾ßÌåÊÇ Óòã´Î·ÖÎö·¨ ½«Ó°Ïì Å©ÒµÔ°Çø µÄ Òò×Ó ½¨Á¢ ÅжϾØÕ󣬽Ó×Å ÀûÓÃArcGISµÄ ¿Õ¼ä·ÖÎö¹¤¾ß ÌáÈ¡ ¸ûµØµÄ ½»Í¨±ãÀû¶È ºÍ ¸ûµØµÄÁ¬Æ¬¶È£¬ÔÙ¸ù¾Ý ÿ¿é¸ûµØµÄÃæ»ý´óС É趨 Æä¸ºÔØÄÜÁ¦ ¼´Ê¾·¶µãµÄ ·þÎñ·¶Î§¡£±¾ÎÄ ½«ÉÏÊöÒò×Ó ºÍ Êý¾Ý ·ÅÈë MATLAB½øÐÐ ÒÅ´«Ëã·¨µü´ú£¬×îºóÀûÓà ArcGIS ½«Ñ¡¶¨µÄµãµÄ·Ö²¼Çé¿ö չʾ³öÀ´¡£ Regarding problems such as possibly existed coverage area overlap of candidate points, different coverage areas among different groups of candidate points, and exponential growth of total number of candidate schemes when there are more candidate points, this paper adopted genetic algorithm to quickly select the optimal scheme on the basis of figuring out advantages and disadvantages of optimized location model. According to characteristics of genetic algorithm (GA) and analytic hierarchy process (AHP), AHP-GA model was established through GIS vector analysis. In addition, taking Yanghe Town£¬Gaoming District,Foshan of Guangdong as example, we designed calculation method of connectivity degree of cultivated land by combing natural characteristics of cultivated land, and thus established land planing decision model based on AHP-GA. To be specific, we first established judgment matrix based on influencing factors of agricultural park using AHP, and then set load capacity (i.e.service range of exemplary base) of each block of cultivated land according to its area. In this paper, the up-mentioned influencing factors and data were input into MATLAB for GA iteration, and finally the distribution conditions of selected points were exhibited using ArcGIS. ¾¹ýÒÔÉÏ·½·¨£¬´óÌåʵÏÖÁË ÏÖ´úÅ©ÒµÔ°ÇøµÄ ¿ìËÙѡַ£¬È¡µÃÁË ½ÏΪÀíÏëµÄ Ч¹û£¬¶ÔÓÚ ½ñºóµÄ ÏÖ´úÅ©ÒµÔ°Çø ÏîĿѡַ ÓÐÒ»¶¨µÄ²Î¿¼ÒâÒå¡£ Through above methods, it basically realized quick site selection of modern agricultural park and achieved ideal results, which provides certain reference significance for site selection of modern agricultural park in the future. |
2Â¥2016-05-11 15:46:44
lvkai1994
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- ×¢²á: 2013-04-26
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