垂直螺旋度的演变对本次西南涡暴雨有较好预报指示意义。
The evolution of vertical helicity has a better forecast instruction significance to the southwest vortex rainstorm.
高层螺旋度负值的演变与沙尘暴的出现有一定的对应关系。
There was definite relationship between the evolvement of helicity's negative value at higher…
沙尘暴区上空垂直螺旋度的垂直分布为中高层负值，低层正值。
The distribution of helicity over the sandstorm area was negative at higher levels and positive at lower levels.
螺旋度是表征流体边旋转边沿旋转方向运动的动力性质的物理量。
Helicity depicts dynamic feature of fluid that is rotating while moving along the rotating direction.
风暴相对螺旋度用于预报时计算的难点在于确定预报风暴移动速度。
It is difficult for the application of relative storm helicity in predicting storms for the uncertainty of storm velocity.
研究了正负材料交界面上光波因螺旋度瞬时翻转所导致的额外相位。
The extra phases of polarized light due to photon helicity inversions on the interfaces between left-and right-(L-R) handed media is considered in this paper.
引入切变风螺旋度和热成风螺旋度，并将其应用于东北冷涡暴雨的诊断分析。
The shearing wind helicity and thermal wind helicity are introduced and applied to a northeastern cold vortex rainfall event.
构造了新的诊断量——水汽螺旋度，并对影响水汽螺旋度变化的因子做了分析。
A new diagnostic quantity-moisture helicity is derived from the moisture equation, and the difinition of helicity, and its influence factors are analyzed in details by the dimensional analysis.
在垂直螺旋度的基础上，定义了散度通量，水汽垂直螺旋度和水汽散度通量三个宏观物理量。
On the basis of vertical helicity, we define three parameters, namely, the divergence flux, moisture vertical helicity and moisture divergence flux.
结果表明：螺旋度作为强对流天气分析预报中的一个重要物理量，在沙尘暴的预报中同样具有很好的指示意义。
As an important physical parameter in analyzing and predicting strong convective weather, the helicity also has good indication in the forecasting of sandstorm.
该哈密顿量所对应的光前形式下的介子本征方程是在螺旋度-动量表象下表述的，不便于得到介子总角动量信息。
The front form meson eigen equations are formulated in momentum-helicity representation which hinders its solution in total angular momentum representation.
本文对电孤放电和催化剂热解碳氢气法制备的多层直形纳米碳管的倒空间及其螺旋度，采用电子衍射进行了研究。
Straight carbon nanotubes with multishells produced by arc discharge and pyrolysis of organic gases using metal particles as catalysts have been investigated by means of electron diffraction.
螺旋度分析表明，在不均匀的强上升气流的作用下，涡旋的水平分量向垂直分量转化是此次强降水的可能机制之一。
The analysis of helicity also revealed that under the updraft, the conversion from the horizontal whirlpool into the vertical whirlpool is one of the possible mechanisms of the event.
本文首先探讨了由多普勒天气雷达提供的垂直风廓线产品(VWP)计算风暴相对螺旋度(SRH)的方法和步骤。
A method and steps of calculating storm relative helicity (SRH) according to the Doppler radar vertical wind profile (VWP) products are discussed firstly in this paper.
通过对天然气在螺旋弯曲和正弦弯曲流道内的流动速度、密度和螺旋度进行研究，得到天然气对弯曲油管的作用力。
After studied the natural gas flow speed, density and helicity in the spiral and sine flow channel, the effects of natural gas to the bending tubing was obtained.
通过对天然气在螺旋弯曲和正弦弯曲流道内的流动速度、密度和螺旋度进行研究，得到天然气对弯曲油管的作用力。
After studied the natural gas flow speed, density and helicity in the spiral and sine flow channel, the effects of natural gas to the bending tubing was obtained.
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