查询词典 periodic

By employing the theory of bifurcations of dynamical systems, the existence of solitary travelling wave solutions, uncountably infinite many smooth periodic wave solutions and non-smooth periodic travelling wave solutions, is obtained.

通过运用动力系统分支理论，获得了系统在各种参数条件下可能存在的孤立行波解、不可数无穷多光滑周期行波解和不光滑行波解，并就不同参数条件，给出了上述解存在的充分条件。

The effect on periodic band gap of unmagnetized plasma is analyzed by its periodic structures and parameters of plasma.The electromagnetic propagation process of a Gaussian pulse through an unmagnetized plasma photonic crystal is investigated.

用时域有限差分法（Finite-Different Time-Domain，FDTD）中的电流密度卷积（Current Density Convolution，JEC）算法讨论了一维非磁化等离子体光子晶体的禁带周期特性，分析了非磁化等离子光子晶体的周期结构和等离子体参量对其禁带周期的影响。

Because the association was stronger in people with RLS and periodic limb movements than in those with just RLS, the researchers and Winkelman believe this genetic variant is likely one associated with periodic limb movements.

因为同时患有RLS和周期性肢体运动的人们比仅患有RLS的人们与基因变体相关性更强，研究人员和Winkelman认为这一基因变体很可能与周期性肢体运动有关。

Advanced face two articles [the 7 big move of sale of industry gain guest] in choose Bsp platform or independent platform to had had a description to rich guest sale, overall for it is spend those who will think easily hard from what gain search engine weight: Bsp platform can shorten relatively many time that build search engine weight are periodic, and although independent platform is periodic long but one but obtain there is taller weight at Bsp platform relatively after approbating.

在前面两篇文章中都对博客营销选择bsp平台还是独立平台有过描述，总体来说都是从获得搜索引擎权重的难易度来思考的：bsp平台相对可以缩短不少建立搜索引擎权重的时间周期，而独立平台虽然周期长但是一但获得认可后相对于bsp平台有更高的权重。

It is shown that the direction of bifurcation and the stability of the bifurcating periodic solutions of the Euler methods are the same as the direction of bifurcation and the stability of the bifurcating periodic solutions of the original delay differential equation when the stepsize is small enough.

证明当步长充分小时数值Hopf分支的分支方向、分支周期解的稳定性与原方程的Hopf分支的分支方向、分支周期解的稳定性相同。

Many experiments shows that the method exhibit high generality to periodic and pseudo-periodic structured textures and can accurately recognize feature point mesh in a highly stochastic texture. Bases on the mesh statistic data, the method also quantizes macro scope randomness of texture. The quantized texture randomness parameter faithfully reflects the regularity of texture macro scope structure.

大量实验证明，该方法对周期及伪周期结构性纹理具有强大的通用性，能准确识别高随机度纹理中的特征点网格，并根据网格的统计数据对纹理的宏观随机度进行量化，量化后的随机度指数准确反映了纹理图像宏观结构的整齐程度。

It signifies that the solutions are periodic or approximately periodic in some specified range of Reynold numbers and that a very complex transition occures by a few period doublings following Feigenbaum's route to chaos.

结果表明在一定的雷诺数范围内解是周期或拟周期的，并且有一个复杂的倍周期分叉途径向混沌转捩。

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Moreover,in this dissertation,a method ispresented to control safe basin with the fractal erosion,that is by the application ofthe weak parameter periodic perturbation with an optimal frequency to control thefractal erosion basin,and the analytical study shows that the essence of the methodis that the parameter periodic perturbation can be used to delay the occurrence ofhomoclinic tangencies.

并且在本文提出了一种对分形侵蚀安全域进行控制的方法，那就是应用具有最优频率的参数周期扰动对于已受到分形侵蚀的安全域加以控制，在理论分析中得到这种控制分形侵蚀安全域的方法实质上延缓了鞍点同宿相切的发生，同时考虑了外加噪声对控制后安全域的影响，得到这种控制方法具有很好的鲁棒性。

In a nonlinear system, there may be many dynamic phenomena such as periodic, quasi-periodic and chaos.

Mallat算法在小波分析中的地位就相当于FFT在经典Fourier分析中的地位。

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。