丰满有漂亮
发表于 2025-3-23 13:38:57
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我没有命令
发表于 2025-3-23 15:30:27
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圣歌
发表于 2025-3-23 21:33:45
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客观
发表于 2025-3-23 23:26:38
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有说服力
发表于 2025-3-24 05:38:29
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Deadpan
发表于 2025-3-24 09:20:37
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ILEUM
发表于 2025-3-24 11:21:49
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受辱
发表于 2025-3-24 16:50:00
The Helmholtz Equation,s of our book are devoted to presenting the foundations of obstacle scattering problems for time-harmonic acoustic waves, that is, to exterior boundary value problems for the scalar Helmholtz equation. Our aim is to develop the analysis for the direct problems to an extent which is needed in the sub
粘连
发表于 2025-3-24 19:55:41
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动脉
发表于 2025-3-25 01:06:25
Ill-Posed Problems,d be unique, and the solution should depend continuously on the data. The third postulate is motivated by the fact that in all applications the data will be measured quantities. Therefore, one wants to make sure that small errors in the data will cause only small errors in the solution. A problem sa