Shuitu Baochi Xuebao, 2004 利用Landsat的TM数据,对地处我国半干旱区的张家口、榆林和定西3个典型区在1997年和2002年的土地覆盖进行了遥感监测,并以土地覆盖类型变化面积和景观格局指数为指标分析了生态环境建设工程的效果及由此而产生的土地覆盖景观格局的变化特征。结果显示,近年来典型区的生态环境在一定程度上都有所改善,以退耕还林还草措施为主的生态环境建设工程取得了一定成效,其中以自然条件好、治理力度大的张家口典型区所取得的成效明显;而自然条件较差,经济基础薄弱的榆林和定西典型区的治理成效相对较小 ...
doaj
[Comparison of missing data handling methods for AC<sub>1</sub> coefficient estimation]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLi K, Xu L, Yu M, An S.
europepmc +1 more source
[Colorectal cancer diagnosis method based on dynamic gland-aware and tissue soft-clustering]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiSu S +5 more
europepmc +1 more source
[Progress on prognostic assessment methods for mild cognitive impairment]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanLin J, Yu G.
europepmc +1 more source
[Ultrasound technologies' new clinical application for chronic liver diseases]. [PDF]
Zhonghua Gan Zang Bing Za ZhiXiao MY, Lu X, Jin JY, Wu ML, Ren J.
europepmc +1 more source
[Development and validation of an explainable machine learning-based model for predicting mortality risk in polytrauma patients]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiJiang Y +7 more
europepmc +1 more source
[Service system models for adolescent mental health in different institutional contexts and their implications for China]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanWang Y, Yan L, Lin Z, Xiao Y, Jiang W.
europepmc +1 more source
[Clinical Frontiers and Applications Progress of ctDNA in Precision Treatment of Non-small Cell Lung Cancer]. [PDF]
Zhongguo Fei Ai Za ZhiYu H, Qiao H, Li J, Du L.
europepmc +1 more source
[Interpretation of the American Dental Association practice guidelines for the management of acute dental pain with pharmacotherapy (2023-2024) and its clinical implications for China]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiZhao D, Zheng L.
europepmc +1 more source
[Development and performance testing of a high-sensitivity pulsed flame photometric detector]. [PDF]
Se PuChen JB +4 more
europepmc +1 more source