The variation characteristics of the annual precipitation in Da’an area of Jilin Province from 1959 to 2007 were discussed based on wavelet analysis method.
基于小波分析的方法,对吉林省大安地区1959—2007年的年降水量序列的变化特征进行了分析。
参考来源 - 基于小波变换的大安地区年降水量变化特征The variation characteristics on farmland were driven by social economic factors,the mainly factor which effects the changes of farmland area was economic factors.
对于耕地来说,其变化特征受到社会经济因子驱动,经济因素是影响研究区域耕地面积变化的最主要的因素。
参考来源 - 基于遥感的土地利用/覆盖变化及其生态环境效应研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The variation characteristics of shallow confined groundwater are similar with phreatic water.
浅层承压水含水组的地下水质变化特征和潜水基本一致。
And determine variation characteristics of attention ability in obese adolescents by giving mental workload.
比较肥胖组和对照组青少年在一定脑力负荷后，注意能力是否存在差异。
Using the current data in the Qiongzhou Strait, we studied the seasonal variation characteristics of residual currents.
本文通过利用多年的琼州海峡海流实测资料，研究了琼州海峡潮余流场的季节性变化特征。
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