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Global Existence,Asymptotic Behavior and Uniform Attractors for Non-autonomous Thermoelastic Systems 被引量:2
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作者 Yu-ming QIN Tian-hui WEI Jia REN 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2016年第4期1015-1034,共20页
In this paper, we first establish the global existence and asymptotic behavior of solutions by using the semigroup method and multiplicative techniques, then further prove the existence of a uniform attractor for a no... In this paper, we first establish the global existence and asymptotic behavior of solutions by using the semigroup method and multiplicative techniques, then further prove the existence of a uniform attractor for a non-autonomous thermoelastic system by using the method of uniform contractive functions. The main advantage of this method is that we need only to verify compactness condition with the same type of energy estimates as that for establishing absorbing sets. Moreover, we also investigate an alternative result of solutions to the semilinear thermoelastic systems by virtue of the semigroup method. 展开更多
关键词 thermoelastic systems global existence asymptotic behavior uniform attractors semigroupmethods
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Global Existence, Asympotic Behavior and Uniform Attractors for Thermoelastic Systems
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作者 LI Jiao-long QIN Yu-ming 《Chinese Quarterly Journal of Mathematics》 2017年第3期221-237,共17页
In this paper, we first establish the global existence and asymptotic behavior of solutions by multiplicative techniques, then further prove the existence of a uniform attractor for a thermoelastic system by using the... In this paper, we first establish the global existence and asymptotic behavior of solutions by multiplicative techniques, then further prove the existence of a uniform attractor for a thermoelastic system by using the method of uniform contractive functions. We finally investigate an alternative result of solutions for the semilinear thermoelastic systems by virtue of the semigroup method. 展开更多
关键词 thermoelastic systems global existence asymptotic behavior uniform attractors semigroup methods
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带第二声速的半线性热弹性力学方程组的间断解——变系数情况的Cauchy问题
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作者 张彦斌 《上海交通大学学报》 EI CAS CSCD 北大核心 2006年第11期1986-1990,2002,共6页
对变系数的情况得到与常系数类似的结论:在松弛因子消失时,温度本身的间断将消失,而温度关于空间、时间的一阶偏导的间断会沿弹性波的特征传播;更进一步,在非线性项含有弹性波位移的一阶偏导时,如对其加一些特定增值条件,当t→∞时,以... 对变系数的情况得到与常系数类似的结论:在松弛因子消失时,温度本身的间断将消失,而温度关于空间、时间的一阶偏导的间断会沿弹性波的特征传播;更进一步,在非线性项含有弹性波位移的一阶偏导时,如对其加一些特定增值条件,当t→∞时,以上提到的跳跃将按指数衰减,并且热传导系数越小衰减速度越快.具体算例的验算结果表明,当非线性函数不满足所给的增长条件时,解的间断跳跃度随时间发展将没有衰减性,从而说明此增长条件对保证解的间断跳跃度关于时间发展有指数衰减性是充分和必要的. 展开更多
关键词 热弹性力学方程组 间断解 渐近性态
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微伸缩的热弹性力学方程组柯西问题解的奇性传播
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作者 杨林 黄琼伟 黄立宏 《数学年刊(A辑)》 CSCD 北大核心 2008年第4期531-542,共12页
用频率分析对角化的方法,研究了一维线性微伸缩的热弹性力学方程组柯西问题解的奇性传播规律.首先从微局部观点出发,利用拟微分算子将双曲抛物的耦合方程组弱解耦.然后利用经典的双曲抛物方程理论和穿梭法,证明了柯西问题解的奇性传播... 用频率分析对角化的方法,研究了一维线性微伸缩的热弹性力学方程组柯西问题解的奇性传播规律.首先从微局部观点出发,利用拟微分算子将双曲抛物的耦合方程组弱解耦.然后利用经典的双曲抛物方程理论和穿梭法,证明了柯西问题解的奇性传播具有有限传播速度、解的奇性沿双曲算子的零次特征带进行传播. 展开更多
关键词 微伸缩的热弹性力学方程组 柯西问题 奇性传播
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