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OALib Journal期刊

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Phase Behavior of Sphere-Forming Triblock Copolymers in Films  [PDF]
Hong-Ge Tan, Qing-Gong Song, Xin-Huan Yang, Ya-Jing Deng
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.23023
Abstract: The self-assembly of sphere-forming triblock copolymers confined between two thin homogeneous surfaces is investigated based on mean-field dynamic density functional theory. The morphologies deviating from the bulk sphere-forming phase are revealed, including cylinders oriented perpendicular to the surface, cylinders oriented parallel to the surface, perforated lamellae and lamellae by varying film thickness and surface field strength. The phase diagram of surface reconstruction is also constructed. By comparing the present phase diagram with the other relevant phase diagram for the cylinder-forming triblock copolymer film, the difference between the sphere-forming and the cylinder-forming triblock copolymer thin film is discussed.
Study on the structural and energetic properties of two-dimensional ground state of Ag+ ion-vacancy in fast ionic conductor AgxTiS2
快离子导体AgxTiS2中Ag+离子-空位的二维基态结构与能量性质研究

Song Qing-Gong,Jiang En-Yong,
宋庆功
,姜恩永

物理学报 , 2008,
Abstract: 根据Ag+离子-空位的二维有序结构建立了三维晶胞模型.采用局域密度近似下的平面波赝势方法,对有序AgxTiS2(x=0,1/4,1/3,1/2,2/3,3/4,1)系列进行了几何结构优化和总能量计算,并与LixTiS2系列进行了对比研究.有序AgxTiS2系统的晶格参量增量Δa
Staging effects on the structural and energetic properties of fast ionic conductor LixTiS2
阶梯化对快离子导体LixTiS2的结构与能量性质的影响

Song Qing-Gong,Jiang En-Yong,Kang Jian-Hai,
宋庆功
,姜恩永,康建海

物理学报 , 2008,
Abstract: 根据密度波理论建立了stage-2有序LixTiS2(x=1/8,1/6,1/4,1/3,3/8,1/2)系统的晶胞模型.采用平面波赝势方法,对stage-2有序系统和stage-1有序LixTiS2(x=0,1/4,1/3,1/2,2/3,3/4,1)系统进行了几何结构优化和总能量计算,并进行了对比研究.发现stage-2晶胞的参量c(d
First-principle study on the electronic structures of intercalation compound Ag1/4TiSe2
插层化合物Ag1/4TiSe2电子结构的第一性原理研究

Song Qing-Gong,Wang Yan-Feng,Song Qing-Long,Kang Jian-Hai,Chu Yong,
宋庆功
,王延峰,宋庆龙,康建海,褚 勇

物理学报 , 2008,
Abstract: 采用基于密度泛函理论的平面波赝势方法,选用局域密度近似对Ag1/4TiSe2及TiSe2的几何结构进行了优化和总能量计算.计算得到的晶格常量与实验结果符合较好,负的形成能表明有序Ag1/4TiSe2系统的稳定性.布居数、键长、能带结构和态密度的计算结果显示:Ag以较强的离子性结合于Ag1/4TiSe2中.Ag的插入使得半金属性的TiSe2
ORDERED STRUCTURES OF HEXAGONAL HONEYCOMB LATTICE
六角蜂窝晶格的有序结构

SONG QING-GONG,CONG XUAN-ZHONG,ZHANG QING-JUN,MO WEN-LING,DAI ZHAN-HAI,
宋庆功
,丛选忠,张庆军,莫文玲,戴占海

物理学报 , 2000,
Abstract: In this paper we determined 6 ordered structure types and 7 perfect ordered structures of hexagonal honeycomb lattice by using concentration-wave theory.And we proposed an explanation for the ordered structures of O atoms absorbed by (0001) surfaces of Ru crystal and Na ions in intercalation compound Nax TiS 2.
First-principles study on the electronic structure and optical properties of YFeO3
YFeO3的电子结构和光学性质的第一性原理研究

Song Qing-Gong,Liu Li-Wei,Zhao Hui,Yan Hui-Yu,Du Quan-Guo,
宋庆功
,刘立伟,赵辉,严慧羽,杜全国

物理学报 , 2012,
Abstract: Rare-earth orthoferrites (such as YFeO3) with orthorhombic perovskite-type structure are promising candidates in the fields of electrode materials, gas sensors and photocatalysts. The geometric structure, the electronic structure and the optical properties of YFeO3 crystal are investigated by using the plane-wave pseudo-potential method, with the scheme of generalized gradient approximation, revised Perdew-Burke-Emzerhof exchange-correlation potential and ultrasoft pseudopotential. The obtained lattice parameters are in good accordance with experimental results reported. The results confirm that YFeO3 crystal is a direct semiconductor with a gap (Eg) of about 2.22 eV, based on the analyses about band structure, density of state, dielectric function, absorption coefficient, and photoconductivity. It is clarified that YFeO3 crystal and nanocrystalline possess good photocatalytic activities for visible light.
First principles computational study on the stability of Li ion-vacancy two-dimensional ordered structures in intercalation compounds LixTiS2
插层化合物LixTiS2中Li离子-空位二维有序结构稳定性的第一性原理研究

Song Qing-Gong,Jiang En-Yong,Pei Hai-Lin,Kang Jian-Hai,Guo Ying,
宋庆功
,姜恩永,裴海林,康建海,郭 英

物理学报 , 2007,
Abstract: 根据局域密度近似下的密度泛函理论,用第一性原理方法对TiS2,LiTiS2和LixTiS2(x=1/4, 1/3, 1/2, 2/3, 3/4)有序系统进行了几何优化和总能量计算.将计算结果与已有的实验和理论结果进行了对比,得到的归一化结构参量增量Δa0和Δc0随离子浓度单调地增加,与实验结果符合较好.Li
Adaptive edge-detection method based on Prewitt algorithm
基于Prewitt理论的自适应边缘检测算法*

KANG Mu,XU Qing-gong,
康牧
,许庆功

计算机应用研究 , 2009,
Abstract: 利用Prewitt基本原理定义了新的算法模板,根据待检测像素周围的3×3邻域的像素平均灰度值,结合人眼的视觉特征自适应地生成动态阈值,不仅保留了原Prewitt算法可并行处理、能够抑制噪声等优点,还提高了运算速度。同时,针对Prewitt算法边缘检测相对粗糙、边缘细化算法效率较低的问题,分析和改进了原有边缘细化算法,改进算法先对含有噪声的图像进行边缘检测,过滤了伪边缘,再对图像边缘进行细化,从而得到单像素边缘。通过实验比较,所提算法能够自适应地生成动态阈值,并在保持Prewitt算法具有抑制噪声性能优点的
In Vitro Characterization of Human Adenovirus Type 55 in Comparison with Its Parental Adenoviruses, Types 11 and 14
Juan Liu, Qing-Gong Nian, Yu Zhang, Li-Juan Xu, Yi Hu, Jing Li, Yong-Qiang Deng, Shun-Ya Zhu, Xiao-Yan Wu, E-De Qin, Tao Jiang, Cheng-Feng Qin
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0100665
Abstract: Human adenovirus type 55 (HAdV-B55) represents a re-emerging human pathogen, and this adenovirus has been reported to cause outbreaks of acute respiratory diseases among military trainees and in school populations around the world. HAdV-B55 has been revealed to have evolved from homologous recombination between human adenovirus type 14 (HAdV-B14) and type 11 (HAdV-B11), but it presents different clinical manifestations from parental virus HAdV-B11. In the present paper, we report the distinct biological features of HAdV-B55 in comparison with the parental viruses HAdV-B11 and HAdV-B14 in cell cultures. The results showed that HAdV-B55 replicated well in various cells, similar to HAdV-B11 and HAdV-B14, but that its processing had a slower and milder cytopathic effect in the early stages of infection. Viral fitness analysis showed that HAdV-B55 exhibited higher levels of replication in respiratory cells than did either of its parents. Cytotoxicity and apoptosis analyses in A549 cells indicated that HAdV-B55 was less cytotoxic than HAdV-B11 and HAdV-B14 were and induced milder apoptosis. Finally, thermal sensitivity analysis revealed that HAdV-B55 exhibited lower thermostability than did either HAdV-B11 or HAdV-B14, which may limit the transmission of HAdV-B55 in humans. Together, the findings described here expand current knowledge about this re-emerging recombinant HAdV, shedding light on the pathogenesis of HAdV-B55.
Parallel mRNA and MicroRNA Profiling of HEV71-Infected Human Neuroblastoma Cells Reveal the Up-Regulation of miR-1246 in Association with DLG3 Repression
Li-Juan Xu, Tao Jiang, Wei Zhao, Jian-Feng Han, Juan Liu, Yong-Qiang Deng, Shun-Ya Zhu, Yue-Xiang Li, Qing-Gong Nian, Yu Zhang, Xiao-Yan Wu, E-De Qin, Cheng-Feng Qin
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0095272
Abstract: Human enterovirus 71 (HEV71) has emerged as the leading cause of viral encephalitis in children in most Asian countries. The roles of host miRNAs in the neurological pathogenesis of HEV71 infection remain unknown. In the present study, comprehensive miRNA expression profiling in HEV71-infected human neuroblastoma SH-SY5Y cells was performed using the Affymetrix Gene Chip microarray assay and was validated using real-time RT-PCR. Among the 69 differentially expressed miRNAs, miR-1246 was specifically induced by HEV71 infection in human neuroblastoma cells, but inhibition of miR-1246 failed to affect HEV71 replication. Parallel mRNA and microRNA profiling based on the 35 K Human Genome Array identified 182 differentially regulated genes. Target prediction of miR-1246 and network modeling revealed 14 potential target genes involved in cell death and cell signaling. Finally, a combined analysis of the results from mRNA profiling and miR-1246 target predication led to the identification of disc-large homolog 3 (DLG3), which is associated with neurological disorders, for further validation. Sequence alignment and luciferase reporter assay showed that miR-1246 directly bound with the 3′-UTR of DLG3 gene. Down-regulation of miR-1246 induced significant changes in DLG3 expression levels in HEV71-infected SHSY5Y cells. Together, these results suggested that miR-1246 might play a role in neurological pathogenesis of HEV71 by regulating DLG3 gene in infected cells. These findings provide new information on the miRNA and mRNA profiles of HEV71-infected neuroblastoma cells. The biological significance of miR-1246 and DLG3 during the course of HEV71 infection deserves further investigation.
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