Power system ; wide area information ; security control ; optimal reclosing ; trajectory concaveness and convexness

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Based on the Arcview platform and compiling programs by ourselves, the DLPM of urban area of Jinan in 1998 and 2001 is established. The main conclusions are: 1 general trend of land price is reduction from central base point to urban edge, but there are different characteristics in different direction; 2 from one edge to another, land price shows low-high-low, and its sections through urban areas show normal school and deflection normal school; 3 land price evolutes with time, concaveness land price terrace changes little or gentle or protruding, and protuberant land price terrace changes little or not, price terrace or big or gentle; 4 the increasing potential of price is analyzed by the increasing rate and increasing speed of land price.

分析數(shù)字地價模型得出結論：①地價從中心基點向城市邊緣總趨勢是降低国产在线拍偷自拍无码，但不同方向表現(xiàn)出不同的特點www.91sese婷；②在貫穿市區(qū)的地價剖面中，一般表現(xiàn)為從一個邊緣到另一個邊緣的地價由低到高再到低的變化規(guī)律黄片一级二级三级黄，由於地價剖面經(jīng)過不同的市區(qū)區(qū)位最新91地址偷自在线永久入口，呈現(xiàn)出正態(tài)和偏正態(tài)的分布特點；③在時間演化上国产熟在线视频，凹性地價階地變小或變平緩AAA黄色视频在线观看，凹性地價階地轉變?yōu)橥剐缘貎r階地，凸性地價階地變小或轉化為非地價階地8x国产精品V片在线，凸性地價階地變大或平緩精品国产免费看；④利用地價增值率和地價增值速度分析了地價的增值潛力。