Kuramoto-Sivashinsky方程解的定性分析

研究Kuramoto-Sivashinsky方程的两种初边值问题,运用Galerkin方法给出一系列先验估计结果,得到广义解和古典解的存在唯一性、正则性及某些条件下的渐近性质。     

Scattering for Semilinear Wave Equation with Small Data in High Space Dimensions

In this paper we study the scattering theory for the semilincar wave equation u_{tt} - Δu = F(u(t, x), Du(t, x)) in R^n (n ≥ 4) with smooth and small data. We show that the scattering operator exists for the nonlinear term F = F(λ) = O(|λ|^{1, α}), where α is an integer and satisfies α ≥ 2, n = 4; α ≥ I, n ≥ 5.     

弱阻尼KdV方程样条小波基下的近似惯性流形

利用样条小波基构造弱阻尼ＫｄＶ方程的近似惯性流形．该项工作将被用于研究该类方程的长期动力学行为及局部性质．     

劳动者行为分析

以边际分析和效用理论研究人的劳动行为,发现人的行为规律性及动力因素与社会偏好的联系,试图对人的一般社会行为研究提供一种定量与定性结合的方法     

钢纤维混凝土受拉性能实验方法研究

在分析国内外钢纤维混凝土受拉性能实验研究存在困难的基础上,提出了新的实验方法——钢纤维混凝土环状试件,在内油压作用下的受拉性能实验研究。通过实验装置的合理设计及正确的实验步骤,成功地测出了钢纤维混凝土环状受拉应力－ 应变全过程曲线,为深入研究钢纤维混凝土受拉性能提供参考依据。     

Asymptotic behavior of solutions of linear homogeneous second-order difference equations

We analyze and study the asymptotic behavior (asn→∞) of the general solutionx _n of the equationx _n+2 =Ax _n +Bx _n+1 ,A≠0,n=0,1,2,..., for various possible values of coefficients and initial data. Translated fromMatematicheskie Zametki, Vol. 66, No. 2, pp. 211–215, August, 99.     

聚β-羟基丁酸酯/超高分子量聚氧化乙烯共混体系相容性和结晶行为

为了解决废弃塑料引起的“白色污染”问题,世界各国竞相研制开发可生物降解高分子材料,其中,有关聚β 羟基丁酸酯［ｐｏｌｙ（β ｈｙｄｒｏｘｙｂｕｔｙｒａｔｅ）（ＰＨＢ）］的研究尤其活跃．然而,由于商品价格较高,材料本身抗冲击性能较差、加工窗口较窄等限制...     

共混改性ACS合金的性能形态与流变性研究

利用增容原理,以α－甲基苯乙烯,丙烯酸酯为单容改性单体,与苯乙烯,丙烯腈乳液共聚,所得共聚物与氯化聚乙烯共混得ＡＣＳ合金,研究了以α－甲基苯乙烯,丙烯酸乙酯用量对ＡＣＳ合金力学性能,流变性的影响,同时考察了树脂的微观结构与形态。     

Phase studies of surfactant–water systems

Significant advances have been made in establishing phase behavior of a number of nonionic, cationic, anionic, catanionic and fluorinated surfactants in water. An interest in phase equilibria existing at sub-ambient temperatures is developing. The study of cubic, intermediate, defective lamellar and sponge phases is an active field of research at present. Further work is needed in exploring thermodynamic stability of rigid nanodisks and densely packed vesicles. Colloidal aspects, thermodynamic and volumetric properties of the surfactant-containing systems deserve special attention.