查询词典 pitchfork

Local codimension two bifurcation of maps,associated with Hopf-pitchfork case,is analyzed using the center manifold theorem and normal form method of maps.

应用映射的中心流形和范式方法，研究了映射在Hopf-pitchfork余维二分岔点附近的参数开折，揭示了含间隙振动系统在余维二分岔点附近的动力学行为。

Moreover, in the parameter plane determined by some two parameters,we discuss codimension two bifurcations caused by the intersections of two bifurcating curves.

同时，在两个参数确定的半参数平面上，我们通过分岔(来源：46e646ABC论文网www.abclunwen.com)曲线的交点讨论了余维2分岔的存在性，即等变Pitchfork-Hopf分岔和Hopf-Hopf分岔。

They had been putting in place the tools of my new business: currycomb,brush,pitchfork.

他们把干我这一新行当所需要的用具——马梳子、刷子、干草叉——安放得井井有条。

They had been putting in place the tools of my new business: currycomb, brush, pitchfork---everything, and there was hay in the loft .

他们把我的那些工具归位，马梳，马刷，干草叉，所有的东西，在草料棚里有干草。

They had been putting in place the tools of my new business: currycomb, brush, pitchfork -- everything, and there was hay in the loft.

他们都在为我张罗着，个个兴高采烈。

After a while I turned and trotted back to the stable. There was the family, father, mother, sisters, all working for me, all happy. They had been putting in place the tools of my new business: currycomb, brush, pitchfork -- everything, and there was hay in the loft.

过了一会儿，我掉转头，马儿得得得跑回马厩，全家都在那儿，父亲、母亲、姐妹们，大家都很开心，他们一直在为我做准备工作，工具摆得整整有条：马梳子、马刷子、干草叉及所有的一切，草料棚也备好了干草。

In particular, the system generates bifurcation when 2c-a=0, and then the stable knot bifurcates a hyperbolic saddle point and stable convergence, which is so-called Pitchfork bifurcation. From 2c-a≤0 to 2c-a≥0, the attracting set A of the system is changed from single point to the union set of two different old orbits.

系统在2c-a=0时产生分岔，其稳定的结点分岔出一双曲鞍点和两个稳定的汇，这就是Pitchfork分岔，可见在2c-a≤0变化到2c-a≥0时，吸引集A从单点集变成为连接P和P的两异宿轨道的并。

The main work of the thesis is summarized as follows:(1) The pitchfork bifurcation of a bidirectional associative memory neural network with three neurons is considered. The pitchfork bifurcation curve can be obtained.

本文主要研究工作如下：(1)研究了含三个神经元的BAM神经网络模型的Pitchfork分支问题，得到了一条Pitchfork分支曲线，并给出了分支曲线图。

Besides, the pitchfork bifurcation of this system is investigated. The pitchfork bifurcation curve can be obtained and the stability of equilibrium points is discussed in the domain partitioned by bifurcation curve.

同时还研究了含有n＋1个神经元的多时滞BAM神经网络模型的Pitchfork分支问题，得到了Pitchfork分支曲线，讨论了在分支曲线的不同区域里平衡点的稳定性。

We give the detail analysis and show that the system exhibits subcritical pitchfork bifurcation, supercritical pitchfork bifurcation and transcritical bifurcation in the different regimes of control parameters,we also give the condition of the occurrence of bifurcation from the trivial solution,and consider the bifurcation directions.

其次，以前的研究工作主要是针对反应项是纯粹的二次项(p=0)或纯粹的三次项(p=1)的反应扩散系统。本文中取p∈[0，1]为参数，得到了比Auchmuty等人的工作更丰富的结论。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。