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Close Orbit Bifurcation and Chaos in a Third-Order Circuit Containing a Nonlinear Capacitor 三阶非线性电容电路中的闭轨分岔与混沌
Bifurcation of Closed Orbit for a Class of Cr System 一类Cr系统的闭轨分支
Perhaps, the most famous one is the Comet Halley, it has a closed orbit with a period of 76 years. 最出名的封闭式轨道彗星当然是以76年的周期绕日运行的哈雷彗星。
By using the closed orbit theory, the photodetachment cross section of H- near a metal surface is derived and calculated. 利用闭合轨道理论，我们推导和计算了H-在金属面附近的光剥离截面。
Unlike the case of the photodetachment of H- near an elastic interface, the length of the closed orbit does not equal the twice distance between the ion and the surface. 傅立叶变换截面中的每一条共振峰正好和电子的一条闭合轨道相对应。
The period, action, and length of the detached electron’s closed orbit are nearly the same as the case of the photodetachment of H- near an elastic interface. 因此可以用弹性截面模拟金属面。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop. 反之,如果恒星很小,维持生命的行星就要在离恒星很近的轨道上运行,而且要有极好的条件才能使生命得以发展
Abstract： The distortion of closed orbit usually causes much side effect which is harmful to synchrotron radiation source such as HLS, so it is necessary to correct the distortion of closed orbit. 摘要：闭轨畸变对合肥同步光源的束流质量产生负面影响，因此必须对闭轨畸变进行校正。
In the second chapter, we consider a kind of Kolmogorov system.The sufficient conditions of nonexistence of the closed orbit and existence of the unique and stable limit cycle are obtained. 第二章讨论了一类Kolmogorov系统，得到了系统无闭轨的充分条件和存在唯一稳定极限环的条件，推广了颜向平，张存华等的结果。
Some sufficient condition to guarantee the existence of global invariant manifolds consisting zero homotopic closed orbits is gived. 同时给出了这类系统存在由第一类（零伦）闭轨组成的全局不变流形的条件。
It is shown that the numbers of both periodic orbits and homoclinc orbits bifurcated from this kind of homoclinic orbits depend heavily on the strength of the inclination flip. 主要结论为这类系统在分支出一个同宿轨的同时所能分支出的周期轨的个数也依赖于倾斜翻转的强度。
He closed the deal successfully and was home free. 买卖成交了，他松了一口气。
People say that the tiger is still lurk close to. 人们说那只老虎还躲在附近。
The boss readily closed with the offer. 老板马上接受了这个报价。
Have you closed the gate and windows? 你把门窗关严实了吗？
He closed his speech with a funny joke. 他用一则有趣的笑话结束了演讲。
That oyster closed up its valves. 那个牡蛎把壳合拢起来。
She is buying a flat close to her office. 她正在购买一套靠近她办公室的单元房。
She's always been very close about her past life. 她对自己过去的生活一直守口如瓶。
For the umpteenth time close the door quietly. 我告诉过你好多次要轻轻地关门。