【摘 要】
:
对于非线性粘弹性Petrovsky方程,已有的研究成果大都是在有界区域内进行的.文章将其解由有界区域转移到无界区域,考虑一类具有粘弹性和非线性源项的非线性Petrovsky方程的柯西问题.当初始能量为非正值、非负不增的松弛函数g在适当的条件下,证得了其柯西问题的解在有限时间内会爆破的结论.
【机 构】
:
晋中学院 数学系,山西 晋中 030600
论文部分内容阅读
对于非线性粘弹性Petrovsky方程,已有的研究成果大都是在有界区域内进行的.文章将其解由有界区域转移到无界区域,考虑一类具有粘弹性和非线性源项的非线性Petrovsky方程的柯西问题.当初始能量为非正值、非负不增的松弛函数g在适当的条件下,证得了其柯西问题的解在有限时间内会爆破的结论.
其他文献
针对多摄像机时空信息提取精度低、融合效果差、与GIS集成困难的问题,提出了一种多摄像机构建室内实时地图的新方法.以高精度室内地图为基础,结合室内地理场景中的先验知识,计算各摄像机与室内地理空间的高精度单应矩阵;通过深度学习的方法,分别构建了人员头部前视和后视目标检测模型,实现了人员头部的高精度检测,并映射至地理空间;对映射后重叠区域中的目标,根据其地理方位、空间关系进行优选,实现了重叠区唯一目标的选择,最终和非重叠区目标共同构建出室内实时地图.基于办公室、教室多摄像机视频与GIS协同的实验结果表明:所提算
Achieving low friction and wear of poly(phenylene sulfide) (PPS) without using fillers or blending is a challenging task,but one of considerable practical importance.Here we describe how neat PPS with high tribological performance is achieved by manipulat
To address the issue of hemilabile catalyst in olefin polymerization catalysis,a cyclizing strategy was used to construct novel N-bridged phosphine-carbonyl palladium and nickel catalysts,resulting in improvements on ethylene (co)polymerizations.The N-bri
针对城市化已有评价模型从人口、土地、经济等角度对大尺度的城市整体进行分析,但对于城市内部精细尺度的城市发展水平评价不多的问题.该文将人口作为城市化的内在驱动,空间形态作为城市化的外在表现,基于两者的耦合关系,以地理格网为基本空间单元度量城市发展水平,并以武汉市主城区为例进行研究分析,结果表明:①空间形态与人口集聚发展水平在城市内部发展均不平衡,两者的发展基本趋于“同步”状态(R2为0.591);②武汉市主城区空间形态与人口集聚两者呈现“单核心-多次中心”的等级空间结构;③城市发展水平表现为多种空间耦合模式
Thermoset plastics have become one of the most important chemical products in the world.The consequent problem is that alth-ough the thermosets possess excellent performance in mechanical strength,they cannot be reprocessed because of the internal permane
Incorporation of nanoparticles into polymer blend to obtain finely dispersed morphology has been considered as an effective strategy to prepare nanocomposites.Owing to the renewable and degradable characters,cellulose nanocrystals (CNCs) have been propose
In this work,a fully rigid coplanar symmetric heterocyclic unit was introduced into the rigid polyimide macromolecular backbone structure to prepare high-performance polyimide fibers.The novel co-polyimide (co-Pl) fibers based on 3,3\',4,4\'-biphenylt
考虑两类相关的时间依赖的Hessian商不等式,第一类不等式与平均场博弈论有关,第二类不等式属于抛物型完全非线性不等式.针对这两类不等式,假设全局正的容许解存在,构造两个合适的测试函数,借助Schwarz和Young不等式计算推出矛盾,从而证明了它们的全局正容许解的不存在性.该结果可视作判定这两类不等式全局正容许解不存在性的充分条件.
Microporous organic polymers with high surface area are widely used in many applications.Among them,hypercrosslinked polymers have been extensively concerned because of their simple processes and low-cost reagents.However,due to most state-of-the-art stra