研究螺旋波有着重要的应用价值。
螺旋波斑图的形成过程与边界条件有关。
The formation process of spiral pattern has relation to the boundary condition.
第二章：简单回顾螺旋波的理论研究及其背景。
In chapter 2, a brief review is presented for the theoretical study and background of the spiral waves.
频谱分析确定了破裂点脉动和螺旋波的频率特征。
Spectrum analysis reveals the frequency characteristics of vortex breakdown point oscillation and spiral wave.
螺旋波等离子体是一种高密度的低温低气压等离子体。
Helicon plasma is a kind of high density, low temperature plasma in low pressure.
因此深入研究螺旋波的形成及其动力学行为具有重要的意义。
It is very important to deeply study the formation and the dynamics of spiral wave.
利用系统本身发光的特点，测量了螺旋波结构的时空动力学；
The spatiotemporal dynamics of the spiral structure is measured for the luminous feature.
结果表明：限制钾离子总电流能有效抑制螺旋波和时空混沌；
One is that the spiral wave and spatiotemporal chaos can be effectively suppressed by limiting the total current of potassium.
在螺旋波里，轨道则是逐渐弯曲，所以密度变大的区域是曲线状。
In a spiral wave, the orbits are progressively misaligned, so that the region of enhanced density is a curved line.
在螺旋波里，轨道则是逐渐弯曲，所以密度变大的区域是曲线状。
Then they shoot back down and wind through a 270-degree spiral.
但在大面积局部缺血时，螺旋波呈现典型的围绕障碍物旋转的功能性折返。
But for larger areas of ischemia spiral wave formed a typical functional reentry around the obstacle.
如果卫星的轨道是椭圆的，就会产生螺旋波，就像是银河系纸风车形状的缩影。
If the satellite has an elliptical orbit the result is a spiral wave a miniature version of the pinwheel pattern of our galaxy.
如果卫星的轨道是椭圆的，就会产生螺旋波，就像是银河系纸风车形状的缩影。
If the satellite has an elliptical orbit, the result is a spiral wave, a miniature version of the pinwheel pattern of our galaxy.
数值分析结果表明，心肌动作电位形成的靶环波和螺旋波对心脏节律影响较大。
The numerical results show that the ring targets or spiral waves generated by cardiac action potential affect the cardiac rhythm greatly.
螺旋波是远离平衡斑图结构中最为重要的一种类型，也是自然界中常见的一种斑图形式。
Spiral wave is one of the most important patterns, which are far away from balanceablestates, and it is also a common pattern formation in the nature.
实验研究了螺旋波斑图的形成过程和演化规律，并测量了其波长随实验参数的变化关系。
Their formation and evolution have been studied, and the wavelength of spirals as the function of the experiment parameters are measured.
采用双水电极实验装置，对大气压氩气介质阻挡放电中的靶波与螺旋波斑图进行了观察测量。
The spiral and target patterns have been observed in dielectric barrier streamer discharge by using water electrodes.
在钙电导率按行波方式变化下，观察到时空混沌转变成螺旋波的现象，对控制机制作了简要讨论。
The phenomenon that the modulated calcium conductivity transforms spatiotemporal chaos into spiral wave is observed. The control mechanism is briefly discussed.
最后，由电子运动方程出发，推导出了简化了的螺旋波纹波导回旋行波管的注波互作用色散方程。
Finally, the simplified beam-wave interaction dispersion equation of Gyro-TWT with a spiral corrugated waveguide was obtained from the equations for electronic locomotion.
利用螺旋波等离子体化学气相沉积(HWP - CVD)技术，以氢气为反应气体产生等离子体。
The hydrogen plasma was excited by the technology of helicon-wave plasma chemical vapor deposition (HWP-CVD).
利用扩展的三变量布鲁塞尔模型，得到了新的时空斑图，其中包括振荡四边形斑图、调制条纹斑图以及螺旋波斑图。
New spatiotemporal patterns including oscillating square pattern, modulated stripe pattern and spiral pattern have been found in a three-variable Brusselator model.
证实了法布里-泊罗标准具中向列液晶的可激性，当系统具有空间延展性时，得到了螺旋波以及不同的斑图的形成。
Excitability in a nematic liquid crystal cell in a Fabry-Perot was confirmed. When this system has spacial extensions, spirals and other patterns were obtained.
斐波那契螺旋是黄金螺旋线的近似表达。
A Fibonacci spiral, which is a close approximation of a golden spiral.
这种情况对飞行员来说很糟，因为螺旋桨的尖部接近声速(在海拔较低的温度下大约1200kph)，冲击波造成强烈震动。
And to make matters worse for the pilot, as the tips of the rotor blades approach the speed of sound (around 1,200kph at lower altitude temperatures), shock waves produce huge vibrations.
研究了含平面等角螺旋天线阵列吸波复合材料的微波吸收特性。
Microwave absorbing properties of the composites containing the planar equiangular spiral antenna arrays were investigated.
第四、首次得到了非洲爪蟾卵母细胞内的螺旋钙波和靶波的解析表达式。
The analytical solutions concerning intracellular calcium spiral and target wave in the Xenopus laevis oocyte are obtained.
谐波螺旋式阀门采用双波谐波螺旋传动，实现由圆周运动向直线运动的转化，实现阀门的启闭。
The harmonic screw type valve is driven by the double wave harmonic screw. It can transform circle movement to line movement for the closing and opening of the valve.
研究结果表明，螺旋线慢波系统的结构参数对它的基波色散特性和耦合阻抗影响非常复杂。
As the research indicates, the structural parameters of the spiral curve slow-wave systems have complicated influence on its fundamental wave dispersion characteristics and coupling impedance.
考虑角向空间谐波，建立了有限厚度翼片加载螺旋线慢波结构的模型，推导出色散方程。
Considering azimuthal space harmonics, the finite size vane model is suggested for vane-loaded helical slow-wave structures in this paper.
考虑角向空间谐波，建立了有限厚度翼片加载螺旋线慢波结构的模型，推导出色散方程。
Considering azimuthal space harmonics, the finite size vane model is suggested for vane-loaded helical slow-wave structures in this paper.
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