本文就漏斗形料仓设计的误取区阐述纠正的方法，并推导出漏斗形料仓最小下料倾角的确定公式。
The paper analyzes the error in design of funneled bin, describes the correcting methods and derives the formula to determine the minimum discharge Angle of the bin.
利用弯曲法进行有倾角的层状介质的两点射线追踪，并采用改进的阻尼最小二乘法迭代求解。
Using the bent method , we do two point ray tracing in dipping layered media and have acquired solutions iteratively with the improved Marquardt least square .
实验结果表明，能使相变段倾角最小的成分配比，也能提高对铸铁成分的热分析检测精度。
Experimental results show that the composition ratio making Angle of phase transformation range become small can also increase the thermal analysis accuracy of cast iron chemical composition.
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