拓扑分子格的弱分离公理

本文是文［１］的继续，我们以Ｑ－远域为工具，首先引入和研究了拓扑分子格的ＳＴｉ分离公理（ｉ＝－１，０，１，２，３，４）。其次我们引入了Ｓ－不定序同态和Ｓ－同胚序同态等概念，给出了它们的若干特征性质。最后我们得到了各种ＳＴｉ分离公理是Ｓ－同胚序同态下保持不变的性质。     

L—FUZZY拓扑空间中几种L—FUZZY紧子集的复盖式特征

首先从Ｌ—ｆｌｌｚｚｙ集的层次结构出发，在Ｌ—ｆｕｚｚｙ拓扑空间中引进了Ｌ－ｆｕｚｚｙ子集的一种复盖，并讨论了这种复盖与Ｌ—ｆｕｚｚｙ子集的远域族之间的关系．然后给出了良紧集、强Ｌ－ｆｕｚｚｙ紧集、Ｌ－ｆｕｚｚｙ紧集、Ｌ－ｆｕｚｚｙ仿紧（Ｌ—ｆｕｚｚｙⅡ仿紧）集、Ｌ—ｆｕｚｚｙＬｉｎｄｅｌｏｆ集、可数良紧集及几乎良紧集的复盖式特征．     

L值Q-下半连续函数的性质及应用

利用强半闭集引入了L值Q-下半连续函数的概念,给出了它的基本性质和特征,在此基础上,证明了LF拓扑空间中的ST i分离性(i=0,1,2,3,4)是L-好的推广.     

邻域均值的视频水印改进算法

针对MPEG-2标准,通过嵌入帧选定和水印嵌入两步实现水印的嵌入。首先利用视频I帧DCT变换低频系数均线与低频系数交叉点确定嵌入帧;然后在嵌入帧选定嵌入位置通过特定DCT系数大小关系实现水印嵌入。实验表明,该算法具有较好的不可见性,且针对常规攻击具有较强的鲁棒性。     

图的λ_k最优性和超级性(k=2,3)的邻域交与边度条件

本文给出了图的λk最优性和超级性(k=2,3)的用邻域交与边度表示的充分条件.     

线性互补问题的邻域跟踪算法

文章把艾文宝的邻域跟踪算法推广到单调线性互补问题(LCP),由于单调LCP的迭代方向不再具有正交性,因此算法的理论分析变得复杂。证明了算法的迭代复杂性为O(nL),并且通过证明对偶间隙的单调性,使得算法易于执行。     

Fuzzy格上的强S不定序同态

本文引入TFuzzy格之间的强S不定序同态，它是连续和S不定序同态的强形式，但又弱于强连续序同态．其中给出了一些良好的特征性质和基本性质，如：L-Fzzy连通集的强S不定象是L－Fuzzy强连通集，L-Fuzzy良紧集的强S不定象是L-FuzzySR-紧集等．     

强Hausdorff空间

强Hausdorff分离性是介于完全Hausdorff分离性与Hausdorff分离性之间的一种新的分离性 ,具有拓扑不变性、遗传性及强Hausdorff空间中S -收敛序列的极限点的唯一性等拓扑性质。     

Local-scale drivers of multi-stemmed tree formation in Acer,in a temperate forest of Northeast China

Acer is an important genus in temperate forests in Northeast China.Individual Acer trees can re-sprout from the root collar and can occur in clonal units,either as a single-stemmed or multi-stemmed tree.However,the factors that induce multiple-stems in Acer remain only partly understood.In this study,we determined the relative importance of abiotic and biotic variables in driving the production of multiple-stems in this genus,within a 25-hm~2experimental forest dynamics plot in Changbaishan(CBS)temperate forest.We used generalized linear mixed models to perform analyses at two levels(community-and specieslevel).We found seven Acer species in total within the plot,where they form a key part of the forest community.Our results show that abiotic factors play a more important role in producing multi-stemmed trees at the community level in CBS.At the species level,the relative importance of different factors varied among species.Shrub species tended to have a higher frequency of multi-stemmed trees under stressful conditions,whereas tree species tended to have more multi-stemmed trees in more suitable habitat.Our results indicate that the relative importance of different factors influencing the frequency of multi-stemmed individuals in Acer differs at the community and species level in the temperate forest.     

亚纯多叶函数某一子类的局部和

在去心单位圆盘E={z：0〈｜z｜〈1}内,利用线性算子Lp（a,c）定义亚纯多叶函数的子类Ωp（a,c;A,B）基础上,定义了亚纯多叶函数的邻域概念,研究了函数f（z）=z-p＋∞∑k=1akzk-p在其邻域下的从属关系和局部和性质.