<正>对研究区两个时相的ETM＋（TM）影像进行土地利用分类，分别采用分类后比较法、图像差值法、光谱特征变异法等方法进行了土地利用变化信息的发现和提取。结果表明：各种动态监测方法中，基于图像融合的光谱特征变异法效果最好。在采用该方法获得的融合图像中，对新增的线状地物，可识别出的最小宽度为9.8m；新增的面状地物，可识别的最小面积为1000m2。左右。该融合图像可以作为土地利用动态监测的指导数据。

Bleaching properties of KP pulp of Larix kaempJeri were investigated in order to understand physical properties of L. kaempJeri pulp. The results showed that the whiteness of bleaching pulp could reach 71% (ISO) after three stages bleaching of general CEH, where the most effective dosage of chlorine and NaOH was 8%, 2.5%, respectively. The whitenessof pulp could reach 81%(ISO) after the bleaching of CDEaD when the most effective dosage of chlorine was 9% and the reasonable dosage of NaOH on EH stage 2%. Both bleaching procedures could reach 82% (ISP) with the total effective dosage of chlorine 7.9%; after the bleaching of D/CE1D1E2D2 and DE1D, E2D2. The whiteness of pulp could reach 76.6%(ISO) from 27.3%(ISO) by a procedure of oxygen bleaching with enhanced H2O2 and bleaching with two stage H2O2 (OPQP1P2).