无界区域上一类带有权函数的半线性椭圆方程解的存在性

利用Sobolev - Hardy不等式和变分法,证明了无界区域上一类带有权函数的半线性椭圆方程解的存在性,该结果将有界区域上解的存在性及全空间上解的存在性推广到了无界的外区域上.     

微分算子的一类重要性质

给出了无界算子成为非游荡算子的充分条件,运用特征向量的方法研究了在Bargmann空间上无界加权后移位算子的非游荡性,由此得出了微分算子在Bargmann空间上是非游荡算子;最后讨论了微分算子在Hardy空间上的非游荡性．     

Marcinkiewicz积分交换子的研究进展

文章旨在介绍Marcinkiewicz积分交换子的发展研究状况,其中包括笔者近几年对Marcinkiewicz积分交换子的研究成果.主要内容涉及Marcinkiewicz积分交换子在Lp空间、Herz空间、Hardy型空间的有界性和端点情形的弱型LlogL估计,并提出若干有待研究的问题.     

《德伯家的苔丝》叙事风格谈片

《德伯家的苔丝》是一部震撼人心的悲剧作品,其艺术成就人们多有论及。本文试从环境描写、细节安排方面略作如下研讨:优美的环境描写与惨痛的故事情节形成鲜明的反差,奇妙而和谐地达到统一,构成小说无与伦比的奇特魅力;环境描写成功地为刻画人物心理活动服务;在细节的处理上显示出作者独具匠心;《圣经》故事的引用,使得整部作品充满了浓烈的浪漫主义气息。     

混合范数空间函数的零点

得到混合范数空间A^p，q、a零点集的结构，显示与Hardy空间零点集的结构完全不同，但类似于Bergman空间的零点集的结构。     

一类椭圆型方程的非平凡解的存在性

椭圆方程解的存在性的主要困难是Sobolev空间到Lp 的嵌入是不紧的.利用集中紧引理和Hardy不等式克服这个困难,运用山路引理证明了一类非线性椭圆方程非平凡解的存在性.     

多圆盘重调和Hardy空间上Toeplitz算子的交换性

引入多圆盘重调和Hardy空间,并研究该空间上Toeplitz算子的交换性。首先给出多圆盘重调和Hardy空间的Toeplitz的算子定义、再生核公式,然后采用比较分析的方法研究Toeplitz算子的性质。研究结果显示：解析Toeplitz算子的半交换子与交换子不一定为0;解析Toeplitz算子的半交换子为0时,其中任何一个因子的符号可以不为常数;解析Toeplitz的交换子为0时,2个因子的符号的线性组合不一定是常数。可见,多圆盘重调和Hardy空间的Toeplitz算子是可交换的。     

分数次Hardy算子的交换子在齐次Morrey-Herz空间上的有界性

先介绍了经典的分数次Hardy算子及交换子的概念,然后再结合齐次Morrey—Herz空间的定义．得到类分数次Hardy算子和单侧二进CMO函数所生成的交换子在齐次Morrey—Herz空间上一些有界性结果．     

Genotypic difference in postharvest characteristics of hardy kiwifruit (Actinidia arguta and its hybrids), as a new commercial crop: Part II. Consumer acceptability and its main drivers

Actinidia arguta, called also hardy kiwifruit, is an exotic fruit of Actinidia genus which have obtained commercial interest in recent years. Its high frost hardiness, relatively short vegetation period and pro-healthy properties make it very interesting, especially in cold regions. The aim of the presented study was to identify main drivers of postharvest consumer acceptability of A. arguta (and its hybrids with A. purpurea) fruit among its sensory (flavour and texture) attributes and appearance characteristics (size and colour). To achieve that goal nine genotypes were assessed by over 200 consumers during two-year experiment. In order to perform a possibly broad research the chosen genotypes included five of the popular A. arguta cultivars grown around the world, two promising genotypes selected at Warsaw University of Life Sciences (WULS) as well as two hybrids (A. arguta × A. purpurea) from the same source. The study consisted of the consumer assessment of external (appearance) and internal (flavour and texture) fruit liking. The results showed general positive consumer acceptance of hardy kiwifruit with low differentiation of its genotypes. No segment of consumers disliking fruit appearance was found and segments disliking their taste and flavour constituted only about 14% in 2005 and 6% of consumers in 2006, respectively. Study indicated a significant effect of fruit size on consumers as it was highly correlated with the mean liking scores in each of consumer segments. The pink-red skin colour has also large positive impact on consumer's Actinidia choice observed in outstanding acceptance of small ‘D11’ genotype. The most preferable fruit should moreover have sweet taste and odour as these features are significant for most of consumers. Genotypes best meeting consumer preferences were pointed, including A. arguta × A. purpurea, which should obtain special breeders' focus.     

《卡斯特桥市长》研究在西方

着重研究《卡斯特桥市长》在西方评论界的接受历程,结合哈代研究的整体脉络,分析现实主义批评与社会文化视角、现代主义批评与人文关怀视角、悲剧传统和文化研究视角三种批评视角的不同解读路径,为中国的外国文学研究提供新的思路。