以下为句子列表：
英文: Characteristics of heat balance parameters of Arctic Ocean drifting ice and open sea are presented based on the profile-flux method and the data obtained by the First Chinese National Arctic Research Expedition during Aug. 19－24,1999.
中文: 利用中国首次北极考察队于1999年8月19日～24日在北冰洋浮冰区获得的大气近地层垂直廓线和辐射等资料，依据相似理论方法，对比分析了北冰洋无冰海面和冰面上热平衡参数的变化特征。
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英文: The finite element analysis of 3D seepage field for surrounding rock mass of cavern groups of underground powerhouses was performed based on the nodal virtual flux method for solving the non-pressure seepage field and the improved drainage substructure te
中文: 摘要在求解无压渗流场结点虚流量法的基础上，结合可精细模拟密集排水孔复杂渗流水力行为的改进排水子结构技术，付某地下厂房厂区洞室群围岩区三维渗流场进行了有限元求解分析，着重研究了防渗排水系统中的帷幕和排水幕的渗流特性。
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