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- The center conditions and isochronous center conditions for a class of quasi-analytic systems were investigated. 摘要研究了一类拟解析系统的中心条件与等时中心条件。
- In this article, the center conditions, isochronous center conditions and bifurcation of limit cycles at infinity for a class of fifth system are investigated. 摘要研究一类五次系统无穷远点的中心、拟等时中心条件与极限环分支问题。
- In this paper, the center conditions and isochronous center conditions for a class of quasi-analytic systems are investigated. 摘要研究了一类拟解析系统的中心条件与等时中心条件。
- Infinity is used as a base point in homemorphic transformation to study infinity for a class of fifth system and isochronous center problems. 摘要通过同胚变换把系统无穷远点化为原点,研究了一类五次系统无穷远点中心与拟等时中心问题。
- In this article,the center conditions,isochronous center conditions and bifurcation of limit cycles at infinity for a class of fifth system are investigated. 研究一类五次系统无穷远点的中心、拟等时中心条件与极限环分支问题。
- The latest algorithm is used to derive the periodic constant when the infinity is used as a center, and the isochronous center conditions at infinity for the fifth system are demonstrated. 利用最新算法求出了无穷远点作为中心时的周期常数,给出并证明了这类五次系统无穷远点拟等时中心的条件。
- orgin to be isochronous center are obtained. 关键词 三次系统;可逆系统;周期系数;等时中心.
- At the same time the new algorithm is applied to find necessary conditions for such isochronous center, then proofs of isochronicity of these systems by using some effective methods are given. 同时通过一种最新算法求出无穷远点为中心时的周期常数,得到了拟等时中心的必要条件,并利用一些有效途径一一证明了条件的充分性。
- He moved the table over to the center of the room. 他把桌子移到房间中心。
- The land is destined for a new shopping center. 这块地已被划作为营建一个新购物中心之用。
- His activities in London center around this spot. 他在伦敦的活动以这个地点为中心。
- The strikers paraded through the city center. 罢工队伍游行穿过市中心。
- Isochronous Center Conditions at Infinity for A Class of Fifth Polynomial System 一类五次多项式系统无穷远点拟等时中心条件研究
- Isochronous center conditions and limit cycles at infinity for a class of fifth systems 一类五次多项式系统无穷远点等时中心条件与极限环分支
- A system of roads radiates from the town center. 一个道路网从镇中心向四面八方伸展出去。
- The new hospital will be sited at the city center. 新医院将座落在市中心。
- New York is a great financial center. 纽约是一个重要的金融中心。
- The center of the sun is exceedingly hot. 太阳的中心极其热。
- Our city is the industry center of the country. 我们城市是全国的工业中心。
- They made a detour to avoid the town center. 他们绕道而行,避开市中心。