分析比较了两种工艺的HF用量、反应温度和稀土浓度对稀土收率和沉淀速率的影响，初步探讨了其沉淀机理。
We analyze and compare the effects of reaction temperature, HF and rare earth concentration on the yield of rare earth and precipitation in two technological process.
但是他希望，通过在纳米管的表面更平均地沉淀铜纳米颗粒，结合其他一些改进，他们能够提高转化速率上千倍。
But he hopes that depositing copper nanoparticles more evenly onto the surfaces of the nanotubes and making other improvements will help boost their conversion rates by a factor of several thousand.
这些是在流体性质，流动速率，传热面上的缩放和沉淀中是可能变动的结果。
These are the results of possible variations in fluid properties, flow rates, scaling or deposits on the heat transfer surfaces.
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