共查询到20条相似文献，搜索用时 703 毫秒
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通过对耦合Gross-Pitaevskii方程组可积性的研究,得到了该方程组通过Painlevé分析得到了其可积性条件,进一步得到了耦合GP方程组在可积条件下的孤子解。 相似文献
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本文对二维变系数线性系统引入不变式预解方程的概念,得到一个新的、实用的可积定理,推广了一系列经典的可积性结果,导出了一些新的可积类型。 相似文献
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对著名的Riccati方程引入预解方程、预解常数和判别式的概念,得到了一个新的可积定理,导出了一系列新的实用的可积充分条件,推广了古典的和近代的可积性结果。 相似文献
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郭晓沛 《青岛职业技术学院学报》1990,(2)
本文在Riemann—stieltjes可积函数的两种不同定义形式下,分别证明了“Riemann可积函数对绝对连续函数是Riemann—stieltjes可积的”这一结论,从而得到了一类Riemann—stieltjes可积函数。 相似文献
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张学元 《衡阳师范学院学报》1990,(3)
本文研究Riccati方程的可积情况,指出了由D.Mirrinovitch于1938年得出并被后来在教学科研中一直引用的可积充分条件所存在的错误,给出了一个普遍的可积充分条件。 相似文献
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本文针对目前实用型积件系统缺乏的现状,分析了通过第三方软件硕思闪客精灵对Flash积件元素的分类与导出．提出了组合Flash实用型积件可积性思想,并结合作者的实践经验,分析了硕思闪客精灵的分解功能,介绍了Flash积件的组合性与组件的扩展性,最后得出Flash积件既可分解也可组合与扩展。 相似文献
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通过对区间[a．b]上有界,有无限个间段点可积函数的研究讨论,给出了一类方便有效的可积函数的判别法,并讨论可积函数类之间的关系。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献