Yancheng Teachers College

Yancheng, China

Yancheng Teachers College

Yancheng, China
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Kuai J.,Yancheng Teachers College | Da H.X.,National University of Singapore
Journal of Magnetism and Magnetic Materials | Year: 2014

We use scattering matrix method to theoretically demonstrate that the quantum Goos-Hänchen shift of the surface on three-dimensional topological insulator coated by ferromagnetic strips is sensitive to the magnitude of ferromagnetic magnetization. The dependence of quantum Goos-Hänchen shift on magnetization and gate bias is investigated by performing station phase approach. It is found that quantum Goos-Hänchen shift is positive and large under the magnetic barrier but may be positive as well as negative values under the gate bias. Furthermore, the position of quantum Goos-Hänchen peak can also be modulated by the combination of gate bias and proximity magnetic effects. Our results indicate that topological insulators are another candidates to support quantum Goos-Hänchen shift. © 2013 Elsevier B.V.

Shi Y.S.,Yancheng Teachers College
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2016

Thin Co films with varying thickness from 1 to 8 monolayers (ML) are epitaxially grown on Pd(001) and are studied in situ by using reflection high-energy electron diffraction (RHEED), scanning tunneling microscope (STM), low-energy electron diffraction (LEED), and magneto-optical Kerr effect (MOKE). The films take the layer-by-layer growth mode up to 3 ML, and then switch to the 3-dimensional growth mode afterward. For the as-grown films, MOKE measurements show that the easy axis of magnetism is in-plane and the interfacial Pd layer is magnetized. These results are confirmed and explained by density functional calculations. © 2016

Xu X.,Yancheng Teachers College | Xiao J.,Nanjing University of Science and Technology | Huang H.,China Academy of Engineering Physics | Li J.,China Academy of Engineering Physics | Xiao H.,Nanjing University of Science and Technology
Journal of Hazardous Materials | Year: 2010

Molecular dynamical (MD) simulations with the COMPASS force field were employed to investigate the influences of temperature (T), the concentration of F2314 binder (W%), and crystal defects on the mechanical properties, binding energy (Ebind), and detonation properties of ε-CL-20(0 0 1)/F2314 PBX (polymer bonded explosives). T was found to have some influences on the mechanical properties, and the PBX at 298 K was considered with better mechanical properties. By radial distribution function g(r) analysis the three types of hydrogen bonds, H⋯O, H⋯F, and H⋯Cl were predicted as the main interaction formats between F2314 and ε-CL-20, and the strength of these interactions changed with temperature changing. The isotropic properties of the PBX increased with W% increasing, but each modulus and Ebind did not monotonously vary with W% increasing. The detonation properties of the PBX decreased with the increasing W%, and the PBX with 4.69% F2314 was regarded with good detonation properties. The existence of crystal defects (vacancy or adulteration) might increase the elasticity but destabilize the system to some extent, and the mechanical properties of PBX were chiefly determined by the main body explosive. The above information was thought guidable for practical formulation design of PBX. © 2009 Elsevier B.V. All rights reserved.

You Y.,Yancheng Teachers College
Modern Physics Letters B | Year: 2010

In the transfer matrix framework of electromagnetic transport, we calculate the group velocities in a one-dimensional photonic crystal composed of a biaxially anisotropic chiral material and dielectric material. According to the isofrequency curves, it is unravelled that two polarized waves possess negative group velocities. As a result, negative refraction can be achieved in the present configuration. In addition, the chirality has a significant influence on the group velocities in the biaxially anisotropic chiral photonic crystal, which even causes the group velocities to change from positive to negative. Our investigations may have potential applications in the chiral-based negative refraction devices. © 2010 World Scientific Publishing Company.

Cai S.J.,Yancheng Teachers college
Applied Mechanics and Materials | Year: 2014

Data exchange can make different information systems of enterprises realize data interaction. The objective establishing it is to keep information sharing and synchronization in enterprises, which can effectively use resources, improve the performance of the system and speeds up information circulation. Data exchange model is the core of realizing data exchange and it has a set of completed data storage and access mechanism. The paper verifies the mapping of relational schema and XML schema, the conversion of database and XML data, and XML document schema, and the paper constructs XSLT documents among different XML schemas, and explains and implements the algorithms of the conversion among different XML documents. © (2014) Trans Tech Publications, Switzerland.

Jiao C.-M.,Yancheng Teachers College
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

The title compound, [Cd(C14H8O6S)(H 2O)2]n, comprises zigzag chains parallel to [111] of alternating [Cd(H2O)2]2+ and sulfonyl-dibenzoate units, with the Cd and S atoms lying on crystallographic twofold axes. The central CdII ion is in a slightly distorted octa-hedral geometry, coordinated by six O atoms from two carboxyl-ate groups and two water O atoms. An intra-molecular C - H⋯O hydrogen bond occurs. In the crystal, inter-molecular hydrogen bonds between carboxyl-ate O atoms and coordinated water mol-ecules in adjacent chains lead to the formation of a three-dimensional network structure. The compound is isotypic with the Zn analog.

Wang G.,Nanjing University of Science and Technology | Gong X.,Nanjing University of Science and Technology | Liu Y.,Nanjing University of Science and Technology | Du H.,Nanjing University of Science and Technology | And 2 more authors.
Journal of Hazardous Materials | Year: 2010

The nitro derivatives of toluenes are optimized to obtain their molecular geometries and electronic structures at the DFT-B3LYP/6-31G* level. Detonation properties are evaluated using the modified Kamlet-Jacobs equations based on the calculated densities and heats of formation. It is found that there are good linear relationships between density, detonation velocity, detonation pressure and the number of nitro and methyl groups. Thermal stability and the pyrolysis mechanism of the title compounds are investigated by calculating the bond dissociation energies at the unrestricted B3LYP/6-31G* level. The activation energies of H-transfer reaction are smaller than the BDEs of all bonds and this illustrates that the pyrolysis of the title compounds may be started from the isomerization reaction of H transfer. According to the quantitative standard of energetics and stability as an HEDC (high energy density compound), pentanitrotoluene essentially satisfies this requirement. In addition, we have discussed the effect of the nitro and methyl groups on the static electronic structural parameters and the kinetic parameter. © 2010.

We predict theoretically that anisotropic metamaterials with arbitrary optical axis can be used to develop a tunable filter in a one dimensional photonic crystal. By means of transfer matrix method, we observe a large peak shift up to 0.2 μ m with the change of the optical axis. This tunability can be ascribed to the intrinsically anisotropic properties in metamaterials, whose dielectric permittivity can be tailored by varying the orientation of the optical axis. These results may be useful in the optical devices. © 2010.

Li G.,Yangzhou University | Li G.,Yancheng Teachers College | Xu L.,Yangzhou University
Order | Year: 2013

In this paper, concepts of quasi-finitely separating maps and quasi-approximate identities are introduced. Based on these concepts, QFS-domains and quasicontinuous maps are defined. Properties and characterizations of QFS-domains are explored. Main results are: (1) finite products, nonempty Scott closed subsets and quasicontinuous projection images of QFS-domains, as well as FS-domains, are all QFS-domains; (2) QFS-domains are compact in the Lawson topology; (3) An L-domain is a QFS-domain iff it is an FS-domain, iff it is compact in the Lawson topology; (4) Bounded complete quasicontinuous domains, in particular quasicontinuous lattices, are all QFS-domains. © 2011 Springer Science+Business Media B.V.

Tao J.-Q.,Yancheng Teachers College
Acta Crystallographica Section C: Crystal Structure Communications | Year: 2013

In the title mixed-ligand metal-organic polymeric complex [Cd(C 14H8O6S)(C16H16N 2)(H2O)] n , the asymmetric unit contains a crystallographically unique CdII atom, one doubly deprotonated 4,4′-sulfonyldibenzoic acid ligand (H2SDBA), one 3,4,7,8-tetramethyl-1,10-phenanthroline (TMPHEN) molecule and one water molecule. Each CdII centre is coordinated by two N atoms from the chelating TMPHEN ligand, three O atoms from monodentate carboxylate groups of three different SDBA2- ligands and one O atom from a coordinated water molecule, giving a distorted CdN2O4 octahedral geometry. Single-crystal X-ray diffraction analysis reveals that the compound is a one-dimensional double-chain polymer containing 28-membered rings based on Cd2O2 clusters, with a Cd⋯Cd separation of 3.6889 (4) Å. These chains are linked by O - H⋯O and C - H⋯O hydrogen bonds to form a three-dimensional supramolecular framework. The framework is reinforced by π-π and C - O⋯π interactions. Copyright © 2013 International Union of Crystallography.

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