多目标规划的整体解

本文在较弱的广义凸性假定下讨论多目标规划的几种整体有效性．给出的定理统一了目前已有的一些关于多目标规划局部解为整体解的充分条件．     

关于二次规划问题分段线性同伦算法的改进

本文利用Ｃｈｏｌｅｓｋｙ分解，Ｇａｕｓｓ消去等技术和定义适当的同伦映射，将关于二次规划问题的分段线性同伦算法加以改进，改进后的算法，对于严格凸二次规划来说，计算效率与Ｇｏｌｄｆａｒｂ－Ｉｄｎａｎｉ的对偶法相当。     

一种新型叠层光敏全息记录软片

通过化学反应，在三醋酸纤维素睛基的正反两面同时生成具有感光活性的光敏层的方法，获得了一种具有叠层光敏性的全息记录软片：重铬酸盐－三醋酸纤维素酯。由该软片记录的叠层体积全息光栅，具有迄今为止，最高的一级实验衍射效率（５４％）。     

新铸光谱标样的制备和定值分析结果

本文叙述了新铸铝光谱标样的制备过程，制备出的标样具有工艺先进，化学成分均匀，定值准确及校准曲线啮合系数高等特点。通过试用分析，结果与化学仲裁分析结果相符，很好地满足了光谱分析铸造铝合金化学成分对标样的需求。     

一类两点边值问题的正解个数

本文讨论边值问题y"+λ(yp+μy+yq)=0,y(-1)=y(1)=0,其中λ＞0是正参数,μ≥0.对(1-p)(1-q)＞0的情形得出了正解的存在唯一性.对(1-p)(1-q)＜0的情形,其主要结论是若p＞1＞q＞-(25+23p)/(23+25p),μ≥0,则存在λ*＞0,使得当0＜λ＜λ*时,此边值问题恰好存在两个正解,当λ=λ*时,存在唯一正解,当λ＞λ*时,不存在正解.     

Cauchy Problem of Some Doubly Degenerate Parabolic Equations with Initial Datum a Measure

This paper discusses the Cauchy problem of the equation

Elliptic Equations with Degenerate Coercivity： Gradient Regularity

In this paper, we prove higher integrability results for the gradient of the solutions of some elliptic equations with degenerate coercivity whose prototype is where for example, a(x,u)=(1+|u|)^−θ with θ ∈ (0,1). We study the same problem for minima of functionals closely related to the previous equation.     

Stability and Existence of Multidimensional Subsonic Phase Transitions

The purpose of this paper is to prove the uniform stability of multidimensional subsonic phase transitions satisfying the viscosity-capillarity criterion in a van der Waals fluid, and further to establish the local existence of phase transition solutions.     

On the Existence of Positive Periodic Solutions for Neutral Functional Differential Equation with Multiple Deviating Arguments

By means of an abstract continuation theory for κ-set contraction and continuation theorem of coincidence degree principle, some criteria are established for the existence of positive periodic solutions of following neutral functional differential equation dN/dt=N(t)[α(t)-β（t)N(t)-∑j=1^n bj(t)N(t-σj(t))-∑i=1^mci(t)N‘(t-γi(t)0].     

Testing Lack-of-fit for a Polynomial Errors-in-variables Model

When a regression model is applied as an approximation of underlying model of data, the model checking is important and relevant. In this paper, we investigate the lack-of-fit test for a polynomial error-in-variables model. As the ordinary residuals are biased when there exist measurement errors in covariables,we correct them and then construct a residual-based test of score type. The constructed test is asymptotically chi-squared under null hypotheses. Simulation study shows that the test can maintain the significance level well.The choice of weight functions involved in the test statistic and the related power study are also investigated.The application to two examples is illustrated. The approach can be readily extended to handle more general models.