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In order to improve the versatility of visual simulation and reduce the repeated development, a parametric design approach was proposed based on the development model of Vega Prime. The development framework of visual simulation based on Vega Prime was analyzed, and three key technologies of parametric modeling were studied: 1) simulation architecture design, to provide a unified design structure for parametric modeling; 2) parameter extraction and description, to standardize the design and implementation of parameters; 3) parameter constraint rules calculation, to associate model parameters, avoid the conflict between parameters and simplify parameter instantiation. Finally, an instance system of parametric visual simulation was designed and implemented. In this instance, the parametric modeling process was described, the visual effects were given, and the feasibility and validity of the parametric design approach were verified.

Based on the concept of concurrence, we have investigated the entanglement dynamics of two two-level atoms coupled to a single-mode cavity field with inhomogeneous couplings. We find that, for some initial states, the inhomogeneous couplings not only induce but also enhance the entanglement in the process of its evolution. In addition, considering the intrinsic decoherence proposed by Milburn, we also find that a proper value of inhomogeneous couplings can enhance the stationary entanglement, and as a result, the destructive effect of intrinsic decoherence on entanglement can be moderated by the inhomogeneous couplings.

We consider a two-qubit Heisenberg XXZ chain as a resource for quantum teleportation via the standard teleportation protocol T0. The effects of anisotropic on teleportation fidelity and entanglement are studied in detail. We find anisotropic not only improves the critical temperature Tc and critical magnetic field Bc, beyond which quantum teleportation is inferior to classical communication protocol, but also enhances the fidelity for fixed magnetic field B and temperature T. For entanglement teleportation, the effects of magnetic field on average fidelity and output entanglement are studied.

We study the thermal entanglement properties of a simple system that includes three spins inhomogeneously coupled between them with additional anisotropy in their couplings. The main result is the systematic analysis of the concurrence evolution as functions of inhomogeneity, anisotropy and temperature. By adjusting proportional factor of the interaction J and anisotropy parameter Δ, the comparison between concurrences C12 and C13 is also presented.

This paper put forward a finite element method to study the radio transmission in tunnel electromagnetic environment. The author makes use of software simulation to study the rectangular tunnel model.When varying the electric parameters of tunnel wall, ceiling and floor, this may somewhat influence the propagation characteristics of electromagnetic wave.In order to study the interference properties of underground electric locomotive ,this paper put forward a moment of method (MoM) model to analysis electromagnetic compatibility in roadway.The author makes use of FEKO software to simulate its time-varying and non-linear characteristics ,the simulation results are in good agreement with experimental data .In the end it can be concludeed that this model has practical significance to estimate electromagnetic interference in coal mine. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3253

The crystal structure of dichloro(5,10,15,20-tetraphenylporphinato)phosphorus(V) chloride dichloromethane solvate has been determined by X-ray diffraction at ambient temperature. A saddle shape of the meso-tetraphenylporphinate disc is attributed to marked S4 deviation from planarity. The mode of the torsion of four phenyl rings around the CC bonds connecting these rings to the respective meso carbon atoms are also of S4 character. The phosphorus atom lies just in the mean plane of the porphinate nitrogen atoms. The PN bond distances range from 1.804(3) to 1.821(3) A, which are shorter than those observed in [P(OH)2(tpp)]+ (1.870–1.916 A), while the axial PCl bond distances [2.149(1) and 2.153(1) A] are significantly longer than the distance expected for the normal covalent PCl bond (2.10 A). This phosphorus porphyrin reveals characteristic features peculiar to the structure of metalloporphyrins with the smallest-sized central cations.