60~#道路沥青的粘温特性测定

本文测定了茂名石化公司生产的60＃道路沥青的粘温特性.得出公式lglg(V 0.6)=8.327-3.042lgT作为该沥青包装、运输、施工等的工作参数.同时采用较简便的混合法测定沥青的粘温特性.     

梯度投影算子Ishikawa迭代的强收敛性

为证明所要结果,首先给出一个梯度投影算子的Ishikawa迭代的CQ变形,并证明它的强收敛性．然后给出一个Ishikawa形式的黏性变形,结合适当条件证明梯度投影算子的强收敛性．     

Viscosity approximation methods with weakly contractive mappings for nonexpansive mappings

Let K be a closed convex subset of a real reflexive Banach space E, T:K→K be a nonexpansive mapping, and f:K→K be a fixed weakly contractive (may not be contractive) mapping. Then for any t∈(0, 1), let xt∈K be the unique fixed point of the weak contraction x tf(x) (1?t)Tx. If T has a fixed point and E admits a weakly sequentially continuous duality mapping from E to E*, then it is shown that {xt} converges to a fixed point of T as t→0. The results presented here improve and generalize the cor- responding results in (Xu, 2004).     

有限簇非扩张映象具误差的黏性逼近

设E是一致光滑的Banach空间,C是E之一非空闭凸子集.设f∶C→C是一压缩映象,T1,T2…,TN∶C→C是一有限簇非扩张映象且∩iN=1F(Ti)≠θ.设序列{xn}定义为xn 1=αnf(xn) (1-αn-γn)Tnxn γnun.本文用黏性逼近方法证明了,在一定条件下,序列{xn}强收敛于T1,T2…,TN的一公共不动点.本文结果也推广和改进了最近一些人的最新结果.     

一类临界复Gross-Pitaevskii方程解的无粘性极限

用 Duhamel 公式和 Strichartz 估计对一类具有三次方和五次方耗散非线性项的复Gross-Pitaevskii方程（CGPE）进行分析,得到方程不同粘度系数趋于零时解之间的关系,即此方程解的无粘性极限。     

Viscosity approximation methods with weaMy contractive mappings for nonexpansive mappings

Let K be a closed convex subset of a real reflexive Banach space E, T：K→K be a nonexpansive mapping, and f：K→K be a fixed weakly contractive （may not be contractive） mapping. Then for any t∈（0, 1）, let x1∈K be the unique fixed point of the weak contraction x1→tf（x）＋（1-t）Tx. If T has a fixed point and E admits a weakly sequentially continuous duality mapping from E to E^＊, then it is shown that {xt} converges to a fixed point of T as t→0. The results presented here improve and generalize the corresponding results in （Xu, 2004）.     

MATLAB在物理实验数据处理中的应用

本文在对Matlab简介后 ,以电子荷质比、液体粘度测量实验的数据处理为例 ,介绍了Matlab在物理实验数据处理中的应用 ,结果表明 ,用Matlab处理物理实验数据方法简单 ,且处理结果更能满足实验要求 ,适合在实验教学中推广     

Concentration and temperature dependence of viscosity of uranium solutions in H_2O and 3 mol/L HNO_3

INTRODUCTIONJone-Doleequation(JonesandDole,1929)isbeingusedextensivelyforstudyingion-solventinteractionsfordilutesolutions(Fahim-ud-Dinetal.,1990).Valuesofion-solventinteractioncoef-ficientdependupontheparticularelectrolyte,concentrationofelectrolyte,temperatureandsol-ventunderconsideration(Afzaletal.,1989).Mohi-ud-DinandIsmail(1983)attemptedtode-scribetheconcentrationdependenceofviscosityintermsofanempiricalisothermalequation,Eq.(1),obtainedfromtheVogel-Tammann-Fulcher(VTF)equation(…     

Image segmentation based on Mumford-Shah functional

In this paper, the authors propose a new model for active contours segmentation in a given image, based on Mumford-Shah functional (Mumford and Shah, 1989). The model is composed of a system of differential and integral equations. By the experimental results we can keep the advantages of Chan and Vese's model (Chan and Vese, 2001) and avoid the regularization for Dirac function. More importantly, in theory we prove that the system has a unique viscosity solution.     

阳离子高分子SOP的性能研究初探

用溶液法合成阳离子高分子SCP，简略介绍了其制备方法；对SCP的性能做了一系列测定：用特性粘度法测定了SCP的分子量，其范围在30万-50万；对其水溶液的粘度、Zeta电位、电导率、表面张力以及水分散体系中阳离子高分子微粒的粒径分布进行了研究。发现这种水溶性阳离子高分子具有很好的抗盐性。