The giant vortex state is circular symmetric with a fixed value of angular momentum l.
巨涡旋态的角动量量子数为L，波函数分布呈轴对称。
To investigate helicopter vortex-ring state, the phenomenon and reason of helicopter vortex-ring state flight accident is analyzed from the view of helicopter aerodynamics.
针对直升机特有的涡环飞行状态，根据直升机空气动力学理论，分析了直升机涡环状态飞行事故的现象及成因。
To predict helicopter vortex ring state boundary is necessary for flight safety.
直升机涡环状态边界的确定对直升机飞行安全具有重要意义。
A reasonable criterion of vortex ring state boundary for helicopter is acquired based on model rotor tests.
通过模型旋翼试验得到了合理的直升机涡环边界判据，并由此计算得到了直升机通用涡环状态边界。
On the basis of it the turbine's operation state is divided into small-duty, vortex strip, steady-duty etc according to the change in load.
在此基础上根据负荷将水轮机运行工况划分为小负荷、涡带、稳定负荷等几个区域。
The result shows that the model of neural network can predict the effect of blade negative-twist on helicopter vortex-ring state.
计算结果表明，神经网络模型能够准确预测桨叶负扭度对直升机涡环状态的影响。
A model of vortex signal in the state of pulsing flow is studied, and a new frequency measuring technique is proposed.
研究脉动流条件下涡街信号的模型，提出频率测量的新方法。
The test showed that: in each test state, the harmful vortex-induced vibration has not been found in the main beams and the bridge towers.
试验结果表明：在试验的各状态下，主梁及桥塔均未发现有害的涡激振动。
The test showed that: in each test state, the harmful vortex-induced vibration has not been found in the main beams and the bridge towers.
试验结果表明：在试验的各状态下，主梁及桥塔均未发现有害的涡激振动。
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