根据理论分析和现有试验成果相结合的方法，研究了排沙漏斗中二次流在排沙中的重要作用。
Combining the theoretical analysis and the existing experimental achievement, the important role of secondary flow for sediment ejection in sand funnel is researched for the first time.
建立了漏斗型MCP的数学模型，给出了降低MCP的噪声因子及提高电流增益的理论依据，为低噪声mcp进一步的工艺研究打下了基础。
A mathematic model of funnel MCP is built. The theoretical evidence of reducing noise figure and improving the current gain is given. It will provide a theory foundation for further craft research.
建立了漏斗型MCP的数学模型，给出了降低MCP的噪声因子及提高电流增益的理论依据，为低噪声mcp进一步的工艺研究打下了基础。
A mathematic model of funnel MCP is built. The theoretical evidence of reducing noise figure and improving the current gain is given. It will provide a theory foundation for further craft research.
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