焦参数(focal parameter) 是圆锥曲线与主轴垂直的焦半径之长，如焦点到准线的距离为p，则焦参数为p与离心率e的积：ep。
根据济钢干熄焦系统的实际运行参数，对干熄焦装置进行了热平衡计算，得出并验证了干熄焦装置的热平衡方程。
According to the practice running parameters of Jigang's coke dry quenching system, the heat balance calculation is carried out, educing and validating the heat balance equation.
研究了激光焊接输出功率、焊接速度、离焦量等工艺参数对焊接深度及焊接宽度的影响。
The effects of laser power? speed and defocusing parameter on welding depth and width have been studied in the experiment.
实验结果表明：该方法能有效地估计离焦模糊参数和复原模糊图像。
Results show that the proposed PSF parameter estimation technique and the defocused image restoration are effective.
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