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Extended Cesáro operators between generalized Besov spaces and Bloch type spaces in the unit ball
Ze-Hua Zhou,Min Zhu
Journal of Function Spaces and Applications , 2009, DOI: 10.1155/2009/548956
Abstract: Let be a holomorphic of the unit ball B in the n-dimensional complex space, and denote by Tg the extended Cesáro operator with symbol g. Let 0 < p <
2-{[4-(Pyridin-2-yl)pyrimidin-2-yl]sulfanyl}acetic acid
Lin Wang,Hua-Ze Dong
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811039791
Abstract: In the title molecule, C11H9N3O2S, the pyridine and pyrimidine rings are almost parallel [dihedral angle = 6.7 (1)°]. In the crystal, adjacent molecules are joined by O—H...N and C—H...O hydrogen bonds, leading to the formation of a sheet parallel to (10overline{2}).
Spectrum of Compact Weighted Composition Operators on the Weighted Hardy Space in the Unit Ball
Ze-Hua Zhou,Cheng Yuan
Journal of Inequalities and Applications , 2007, DOI: 10.1155/2007/61313
Abstract: Let BN be the unit ball in the N-dimensional complex space, for , a holomorphic function in BN, and , a holomorphic map from BN into itself, the weighted composition operator on the weighted Hardy space H2( 2,BN) is given by (C , )f= (z)f( (z)), where f ¢ H2( 2,BN). This paper discusses the spectrum of C , when it is compact on a certain class of weighted Hardy spaces and when the composition map has only one fixed point inside the unit ball.
Spectrum of Compact Weighted Composition Operators on the Weighted Hardy Space in the Unit Ball
Zhou Ze-Hua,Yuan Cheng
Journal of Inequalities and Applications , 2007,
Abstract: Let be the unit ball in the -dimensional complex space, for , a holomorphic function in , and , a holomorphic map from into itself, the weighted composition operator on the weighted Hardy space is given by , where . This paper discusses the spectrum of when it is compact on a certain class of weighted Hardy spaces and when the composition map has only one fixed point inside the unit ball.
Differences of Composition Operators on the Space of Bounded Analytic Functions in the Polydisc
Zhong-Shan Fang,Ze-Hua Zhou
Abstract and Applied Analysis , 2008, DOI: 10.1155/2008/983132
Abstract: This paper gives some estimates of the essential norm for thedifference of composition operators induced by and acting on the space, ∞(), of bounded analytic functions on the unit polydisc , where and are holomorphic self-maps of . As a consequence,one obtains conditions in terms of the Carathéodory distanceon that characterizes those pairs of holomorphic self-mapsof the polydisc for which the difference of two compositionoperators on ∞() is compact.
Product of Extended Ces\`lcurlybarcurlybro Operator and Composition Operator from Lipschitz Space to Space on the Unit Ball
Yu-Xia Liang,Ze-Hua Zhou
Abstract and Applied Analysis , 2011, DOI: 10.1155/2011/152635
Abstract: This paper characterizes the boundedness and compactness of theproduct of extended Cesàro operator and composition operator from Lipschitzspace to (,,) space on the unit ball of ?.
Multiscale Unsupervised Segmentation of SAR Imagery Using the Genetic Algorithm
Xian-Bin Wen,Hua Zhang,Ze-Tao Jiang
Sensors , 2008, DOI: 10.3390/s8031704
Abstract: A valid unsupervised and multiscale segmentation of synthetic aperture radar(SAR) imagery is proposed by a combination GA-EM of the Expectation Maximization(EM) algorith with the genetic algorithm (GA). The mixture multiscale autoregressive(MMAR) model is introduced to characterize and exploit the scale-to-scale statisticalvariations and statistical variations in the same scale in SAR imagery due to radar speckle,and a segmentation method is given by combining the GA algorithm with the EMalgorithm. This algorithm is capable of selecting the number of components of the modelusing the minimum description length (MDL) criterion. Our approach benefits from theproperties of the Genetic and the EM algorithm by combination of both into a singleprocedure. The population-based stochastic search of the genetic algorithm (GA) exploresthe search space more thoroughly than the EM method. Therefore, our algorithm enablesescaping from local optimal solutions since the algorithm becomes less sensitive to itsinitialization. Some experiment results are given based on our proposed approach, andcompared to that of the EM algorithms. The experiments on the SAR images show that theGA-EM outperforms the EM method.
Using Micro-Ecosystem to Assess the Bioactivity of Heavy Metals in the Mine Tailings From Dexing Copper Mine,China
模拟池塘微生态系统研究尾矿砂中重金属吸附及其生物有效性

LI Ze-Hua,
黎泽华

生态学报 , 2002,
Abstract: Dexing copper mine, which lies in the northeastern Jiangxi Province, China, is one of the largest copper mine in Asia. No.1 mine tailings pond was abandoned in 1987, which resulted in a 210 hm 2 pond requiring stabilization with water cover. Mine tailings pond is of environmental concern for potential hazards in surface and groundwater, which may be uptake by vegetation and bioaccumulation in food chains. Diversity of landscape and stability of tailings is important to remain the manmade reservoir. The met...
1,3,5-Trinitro-2,4-bis(2-phenylethenyl)benzene
Ze-Rong Guo,Hua-Bo Li,Fang Li
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810034732
Abstract: In the title compound, C22H15N3O6, the central benzene ring and one of the phenyl rings are essentially parallel to each other, making a dihedral angle of 1.35 (16)°. The dihedral angle between the two phenyl rings is 83.56 (19)°. Intramolecular C—H...N and C—H...O hydrogen bonds occur. In the crystal, molecules are linked through C—H...O hydrogen bonds. Furthermore, offset face-to-face π–π interactions with centroid–centroid distances of 3.644 (2) help to stabilize the crystal structure.
1-Acetyl-5-isobutyl-2-sulfanylideneimidazolidin-4-one
Kaozhen Li,Qiu Feng,Ze-Hua Lu
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810037256
Abstract: There are two independent molecules in the asymmetric unit of the title compound, C9H14N2O2S. In the crystal, the molecules are linked by N—H...O hydrogen bonds, forming a chain along the a axis.
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