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焦散
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焦散
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焦散
在射线声学理论中,使聚焦因子趋于无穷大的现象。使聚焦因子趋于无穷大的点称为焦散点,其邻近区域是射线管聚焦所致的声强急剧增强区,称为焦散区。射线族上由临近声线交聚点(焦散点)所形成的包络线称为焦散线,而由临近声线交聚线(焦散线)所形成的包络面称为焦散面。
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caustics
焦散
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river bed armoring
riverbed deformation
riverbed intake structure
riverbed with heterogeneous habitat structure
river biota
river bottom tunnel
river branching parameter
river canalization
river capture
river cascade hydropower development
river channel bed
river channel bed form
river channel self-adjustment
river channel strengthening engineering
river chart
river closure
river connectivity restoration
river corridor
river crossing and bridge equipment
river deity temple
river density
river disconnection
river-dominated delta
river dynamics
river ecosystem
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