The results indicate that flat-top beam shaping and single-circle beam shaping at the focal plane can all be realized by using three-zone annular phase pupil filters.
模拟结果表明，利用三环相位光瞳滤波器，不仅可以在焦面上实现光强的平顶分布，而且还可以得到单环衍射光束。
A theoretical analysis was carried out for evaporative heat transfer of annular two phase flow of liquid film and high velocity air in vertically heated tubes.
通过理论分析，研究了竖直传热管内降膜-高速空气环状两相流的蒸发换热特性。
In the annular gap scrubber, there exists complicated three-dimensional compressible flow associated with the two phase flow and heat transfer between gas and water particle.
环缝洗涤器内是一个高速可压缩三维流动过程，并伴随有高炉煤气和雾化水滴的两相流动传热。
Its basic principle is that there is a quite steady flow state of annular flow in the flow pattern of gas-liquid two-phase flow.
模型是建立在压力能量消耗率最小的原理上的，其基本原理是：在气-液两相流的流型中，环状流具有相当稳定的流动状态。
The void fraction of annular two-phase flow inside cylinder is analyzed.
对圆管内环状两相流的空泡份额进行了分析。
For overcoming the shortcoming, a phase-only optical filter is used to change the phase of annular zones of coherent extended source.
为了克服这个缺点，提出了使用相位滤波器改变相干面光源不同环区的相位。
In this article the analytical calculation has been made for the evaporator heat transfer in absorption-diffusion refrigeration system with the annular two-phase two-component heat transfer model.
本文采用双组分环状二相流模型对吸收-扩散式制冷系统蒸发器的传热进行了分析计算。
Objective to investigate the clinical value of phase analysis by mitral annular movement in assessment of left ventricular diastolic function.
目的探讨二尖瓣环时相评估左室舒张功能的临床意义。
Through a theoretical analysis a study has been carried out concerning the evaporation heat exchange characteristics of water-air annular two-phase flows in a vertical slender tube.
通过理论分析，研究了竖直细小管内水—空气环状两相流的蒸发换热特性。
New parameters (t, w) are used to determine the superresolution region of three zones annular binary phase filter through numerical simulations.
通过数值模拟，使用新的参数t, w讨论确定了三区二元相位型光瞳滤波器的超分辨区域。
Based on the theory of annular gas-liquid two-phase flow, a model to calculate gas-cutting fluid flow in wellbore is established, and meanwhile a numerical solution to the model is given.
以环空气液两相流动为理论基础，建立了井筒气侵流动计算模型，同时给出了计算模型的数值求解方法。
Based on the theory of annular gas-liquid two-phase flow, a model to calculate gas-cutting fluid flow in wellbore is established, and meanwhile a numerical solution to the model is given.
以环空气液两相流动为理论基础，建立了井筒气侵流动计算模型，同时给出了计算模型的数值求解方法。
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