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The transverse wave disturbance along tangential base flow of circular vortex is discussed By using numerical method we study this instability of baroclinic flow which is mesoscale inertia wave instability on the cylindrical coordinate The influence of stratification stability N 2 , Coriolis parameter f 0 , the vertical shear of tangential wind z of the ambinent atmosphere and the latent heat on the growth rate of instability is studied From the above analysis and calculation, we can learn that there are Eady mode and mesoscale mode of transverse wave instability in circular vortex as well Furthermore we also learn that distribution character of mesoscale mode disturbance field of transverse wave instability, anomalistic "cats eye" structure of lower level and the character of the slowly spreading disturbance converges at low level and the quickly spreading disturbance converges at high level

作者中文名:李红金;陆汉城;宋晓亮;李鲲摘要:讨论涡旋大气中,存在沿切向基流传播的横波型扰动,并采用数值方法讨论了柱坐标系下圆形涡旋系统斜压气流中这类扰动的不稳定,这是一类中尺度的重力惯性波的不稳定。研究了涡旋环境大气的层结稳定度参数N2、切向风垂直切变Vz、凝结潜热、涡旋特性及科里奥利参数f0对不稳定增长率的影响。圆形涡旋中同样存在横波不稳定的Eady模态和中尺度模态,得到了中尺度模态的扰动场分布特征:流场的不规则"猫眼"结构及慢速传播的扰动均集中在低层,而快速传播的扰动均集中在高层的扰动特征。

And the cross correlation function is approximately zero, which makes them suppress the disturbances due to the other users. After describing some basic knowledge of chaotic theory in chapter 2, we interview and classify the applications of chaos in communications including chaos secure communication, chaotic spreading codes for multi-user access in spreading spectrum system and chaotic modulation and demodulation in chapter 3. FM-DCSK system with non-coherent demodulation offers the best performance in chaotic modulation schemes.

在混沌调制方案中, FM-DCSK调制是一种极具竞争力的混沌调制方式,它克服了CSK、COOK、DCSK解调中存在的估计问题的缺点,在无线信道的传输过程中,可以很好的抑制噪声干扰与多径衰落,并且能获得非常优越的解调性能,加上混沌信号本身优越的保密性能,该调制方式在未来的无线通信领域存在着巨大的潜在优势。

The experiments show that the time when the government starts to take strict control policy has the crucial influence on SARS spresding, and in free-spreading period, the panic within measure will suppress the epidemical spreading.

实验表明,政府采取严格的控制政策的时间对于 SARS 传播行为有决定性的影响,在自由传播时期,民间适度的恐慌心理有利于对 SARS 传播的抑制。

The correction factor can be expressed in several equivalent forms: matrix tensor, velocity spreading factor and geometrical spreading factor.

该校正因子有几种等价的描述形式:度规量、速度扩散因子和几何扩散因子。

In a reference frame attached to the flame front, the flame spreading rate becomes an eigenvalue for the flame spreading over a rod fuel.

当参考坐标系团结在火焰前锋上时,该火焰传播问题成为一准稳态问题,燃料以一固定速度供给火焰。

In the dyestuff spreading test in rats, the authors found a statistically significant inhibition of the hyaluronidase activity, which means that the spreading of inflammation was prevented.

对大鼠进行染色试验,作者发现多磺酸粘多糖能显著抑制透明质酸酶的活性,从而能预防炎症的扩散。

Under the quasi-synchronous idea, some new spreading codes are constructed. The new spreading codes are suitable for QS-CDMA system, since their cross-correlation value is very low around origin.

在多径衰落信道上准同步码分多址系统性能分析及其与同步码分多址的比较,表明了准同步码分多址系统的独特性能。

We establish a microtechnique developed from cytochrome C spreading methods allowing the detection of minimal amounts of DNA through a calibrated composition of buffer、denaturing agents and cytochrome C in an extremely small volume of spreading mixture.

将变性剂脲、乙二醛、甲酰胺引入展开过程,我们在国内首次建立了可检测1×10〓--2×10〓ug以下量DNA样本的微量展层技术,能较好地展开dsDNA及ssDNA分子,DNA形态及长度与经典技术所制样本相似。

In order to obtain an accurate and simple design and to express the relation between design parameters, and between the parameters and the design effect,based on the mathematical model of the neckband curve of a lapel shaping device, a spreading method by using MATLAB software was introduced. The selected parameters, the spreading plot and the 3D neckband entity were all displayed visually in a computer.

在常见的制袋充填封口的多功能包装机中,翻领成型器是利用其成型表面而使薄膜在输送过程中,强迫成型的原理而设计的一种制袋成型器,广泛应用于立式间歇工作的充填封口机上,圆形加料管翻领成型器由外表面为领状而内表面为管状的内外工作曲面组合而成(如图 1所示)。

The author analyses the perniciousness to the society of making and spreading computer virus, the necessity of stipulating making and spreading computer virus a kind of criminal offense and the constitution of the crime.

分析了此罪的犯罪构成。

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The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0,0.4,0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗,测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础,研究二值图像的形态分析算法,探讨最小结构元素的两种基本形态:膨胀和腐蚀;分析了数学形态学复杂算法的基本原理,把数学形态学的部分并行处理理念引入到家实际应用中。

Have a good policy environment, real estate, secondary and tertiary markets can develop more rapidly and improved.

有一个良好的政策环境,房地产,二级和三级市场的发展更加迅速改善。