The number and stability of the limit cycles of a class of polynomial system with degree n are studied under some conditions by means of the results about Abel equation.

并利用關(guān)于Abel方程的這些結(jié)果得到了一類n次多項(xiàng)式系統(tǒng)在一定條件下極限環(huán)的個數(shù)和穩(wěn)定性。

In the fourth chapter, some general equations are studied, of which Abel equation and some equations that have been intensively studied are the special cases.

第三章利用Abel方程已有的結(jié)果來討論多項(xiàng)式系統(tǒng)的極限環(huán)的存在性国内大量愉拍人妻精品视频，個數(shù)和穩(wěn)定性在线视频国产激情，推廣了水樹良和蔡燧林的相關(guān)工作。

Up to now, the package can not be replaced by any other math tool in solving special differential equations, such as Abel equation in many application fields.

它是諸多應(yīng)用領(lǐng)域內(nèi)處理Abel型等特殊類型微分方程的十分有效的計(jì)算工具国产亚洲AAA片在线看。

In the fifth section, we obtain some sufficient conditions under which a class of a planar quintic system has at most two limit cycles by transforming it into Abel equation.

第五章討論了一類可化為Abel方程的五次多項(xiàng)式系統(tǒng)的極限環(huán)的個數(shù)五月欧美色图日本激情，得到此類平面五次多項(xiàng)式系統(tǒng)至多存在兩個極限環(huán)的充分條件。

Two types of new Abel differential equation are structured by method of variation replacement, variation position transformation and compound function derivation law.

借助變量替換法欧美熟妇丰满肥白大屁股、交換變量位置法及復(fù)合函數(shù)求導(dǎo)法則亚洲全黄无码一级，構(gòu)造出兩類新的 Abel型微分方程，論證它們的可積性A毛片好看免费视频，提供可積的判據(jù)激情aaaaa，從而推廣有關(guān)文獻(xiàn)的結(jié)論，擴(kuò)大微分方程的可積范圍亚洲黄色视频免费。

In this period he was having the support of Abel Avila, one of the most important writers of Colombia that was reading the FeiKai poetry and convince him of publish the book.

他得到了哥倫比亞最重要的詩人之一 Abel Avila 的支持，也正是 Abel Avila 促使了費(fèi)凱詩歌的出版国产精品高清无码。

We showed that if G is a non-perfect 11-decomposable finite group, then G is isomorphic to an Abel group of order 121, or a non-Abel group of order pq, here p, q are primes which satisfy p-1-=10q or p=11, q=,r is a prime, too.

在本章中主要證明了久久黄色一级A片，11-可分解的有限可解群，必同構(gòu)于121階Abel群：或同構(gòu)于pq階非Abel群H漫无遮挡全彩纯肉动漫，其中p精品日韩欧美一区二区久久，q均為素?cái)?shù)，且滿足p-1=10q或p=11先锋资源网站在线，q=劲爆A片免费网址？

These results show that:(1) the results retrieved from the Abel integral and absolute TEC inversion are consistent on the whole at higher orbits altitude (~800 km), and in good agreement with those measured by ionosondes; the results retrieved from absolute TEC inversion are in better agreement with those obtained from ionosondes than that by the Abel integral inversion at lower orbits attitude (~500 km);(2) the maximal electron density N m from absolute TEC inversion is closer to N mF2 from ionosondes than that from Abel integral inversion, and the method of the former is more rigorous and effective than that of the latter;(3) absolute TEC is more sensitive to cycle slip than Abel integral, but for the two ways significant loss of inversion precision due to cycle slip always exists.

結(jié)果表明：（1）在較高軌道高度（約800 km），Abel積分與絕對TEC方法的反演結(jié)果基本一致永久免费的毛片视频网站，都與電離層測高儀反演結(jié)果符合良好人人操必人人操；在較低軌道高度（約500 km），絕對TEC反演精度優(yōu)于Abel積分反演精度有什么网址可以看毛片；（2）絕對TEC反演的最大電子密度 N m較Abel積分法獲得的結(jié)果更接近于電離層測高獲得的峰值電子密度 N mF2日韩特级无码毛片免费视频，絕對TEC反演法更加嚴(yán)密和有效；（3）周跳對絕對TEC反演結(jié)果的影響較Abel積分反演結(jié)果的影響更為敏感亚洲欧美高清色码，但無論哪種方法欧美福利网站大全，周跳對反演精度都造成嚴(yán)重?fù)p失。

A plasma electron density profile in the HT-6M tokamak is obtained when an asymmetric Abel-inversion which depends on plasma shifts is applied to the signals of multichord interferometric measurement.

一種常用的非對稱Abel變換是分離變量法国产极品主播粉嫩福利在线，它的基本思想是把測量信號分成對稱元和非對稱的權(quán)函數(shù)久久99精彩视频，對稱部分采用標(biāo)準(zhǔn)的Abel變換人人操人人操人人看，變換的結(jié)果乘上非對稱的權(quán)函數(shù)。

In dealing with the upper singularity point of Abel inversion transfer, a zenith compensation term is introduced, which makes simple and stable in Abel inversion process.

在Abel積分變換的上奇點(diǎn)的處理中肥女人一级A片免费视频，推導(dǎo)了大氣折射指數(shù)反演的天頂補(bǔ)償項(xiàng)9cao在线播放精品日韩，使Abel積分變換的算法更簡單而且更穩(wěn)定。