一类复常微分方程组的亚纯解

本文应用值分布论,对一类复常微分方程组亚纯解的可能形式进行了研究,推广了[4]中的结果。     

半线性热方程的一个反问题

讨论了无界区域上半线性热方程确定未知数偶（ｕ，ｐ）的反问题。设计了一种独特的迭代方法，给出了该问题整体解的存在惟一性和稳定性。     

原子-键电负性均衡融合进分子力场对CoCl3水溶液的分子动力学模拟研究

298．15K时运用原子-键电负性均衡融合进分子力场（ABEEM／MM）对CoCl3水溶液进行了分子动力学模拟．结果表明，ABEEM／MM力场模型可以获得体系的动态电荷，充分考虑了体系中存在的极化现象，从而及时地调节改变的静电场，真实地模拟了溶液的微观结构；并且CoCl3溶液中钴离子更倾向于和氯离子配位，而使钴离子与水分子的配位能力降低．     

Tax Evasion: Models with Self-Audit

Different from traditional tax audit, supervision with self-audit is a combination of audit by the taxpayer himself and audit by the tax authority. This paper mainly studies a taxpayer＇s optimal policy of tax evasion under supervision with self-audit and its related properties, in order to deduce some effective suggestions and theoretical bases to restrain tax evasion. Assuming that only a certain proportion of evaded tax can be discovered when the audit is executed, the authors first formulate a static model with self-audit. This model is divided into two stages. At the first stage, taxpayers declare their taxes, then the tax authority chooses audit objects, based on a known probability, and announces the result; if the taxpayer is chosen, he will enter the second stage, during which he has a chance to pay the evaded tax and the corresponding late fees and then is audited by the tax authority. The authors show the existence and uniqueness of the optimal amount of tax evasion at the first stage and the optimal proportion to self-expose at the second stage. The authors also discuss the related properties of the interior solution, and do elasticity analyses on some parameters. Besides, the authors extend the static model into the corresponding two-period model, and study the existence and uniqueness of the solution of the extended model. Finally, under the assumption that tax evasion can only be discovered with a certain probability when the audit is executed, the authors formulate another static model with self-audit and investigate its properties.     

可控增长条件下一类椭圆型方程弱解的局部极值原理

研究二阶非线性椭圆型偏微分方程－ｄｉｖＡ（ｘ，ｕ， ｕ）＋ Ｂ（ｘ，ｕ，ｕ）＝μ，在可控增长结构条件－Ａ（ｘ，ｚ，η）·η≥λ｜η｜ｐ－Ａ｜η｜ｐ＊－１，Ｄ｜Ａ（ｘ，ｚ，η）｜＜Ａ１（｜η｜~(ｐ－１)十｜ｚ｜ｐ＊（１－１／ｐ）．｜Ｂ（ｘ，ｚ，η）｜≤Ａ（｜η｜ｐ（１－１／ｐ＊）＋｜ｚ｜ｐ＊－１）下，应用 Ｍｏｓｅｒ迭代法得出弱解的局部极值原理，并进一步得出弱解的内部估计和全局估计．     

周期与反周期的Halanay准则

研究发展方程的周期解和反周期解的存在性, 给出了发展方程的周期与反周期的Halanay准则.     

海湾潮流方程组的C~∞解

本文研究海湾潮流方程组,在边界面是固壁特征时的混合问题,得到了局部C~∞解的存在和唯一性定理。     

广义TD族及一些非线性演化方程的显式解

借助于Darboux交换和分解,获得了广义TD族和一些(2 1)维或(1 1)维非线性演化方程的显式解(包括孤立子解),特别得到了KP方程的新解.