Xuzhou Institute of Technology

About: Xuzhou Institute of Technology is a education organization based out in Xuzhou, China. It is known for research contribution in the topics: Catalysis & Adsorption. The organization has 1696 authors who have published 1521 publications receiving 13541 citations.

Strength and ductility of powder consolidated ultrafine-grain tantalum

Abstract: Bulk ultra-fine grain tantalum was successfully fabricated from pure tantalum powder particles with an average particle size of 50 μm by equal channel angular extrusion at 900° C and 1200° C using three different processing routes. The effects of extrusion route and temperature on the consolidation performance are evaluated through microstructural analysis and room temperature mechanical testing. The consolidated tantalum has a “wood grain” like structure with strong interparticle bonds and a grain size

Correlation effects for nl-n′l′ transitions in nine isoelectronic sequences of silver ions

Abstract: We present a comprehensive theoretical study of atomic characteristics of nine isoelectronic sequences of silver ions in a broad range of wavelengths and transitions Energy levels and transitions probabilities are calculated for nl – n ′ l ′ transitions particularly in Ag XLV, Ag XLIV, Ag XLII, Ag XXXVII, Ag XXXVI, Ag XXXV, Ag XIX, Ag XVIII, Ag XVII ions Atomic structure and radiative characteristics of Li-like, Be-like, B-like, Na-like, Mg-like, Al-like, Cu-like, Zn-like and Ga-like silver ions are computed by multiconfiguration Dirac–Fock (MCDF) and relativistic configuration interaction calculations (RCI) The valence–valence, core–valence and core–core correlations are also considered The calculated values including core–valence correlation are found to be similar and to compare very well with other theoretical and experimental values We believe that our extensive calculated values can guide experimentalists in identifying the fine-structure levels in their future work

Stability of Bifurcated Periodic Solutions in a Delayed Competition System with Diffusion Effects

Abstract: In this paper, a delayed Lotka—Volterra two species competition diffusion system with a single discrete delay and subject to the homogeneous Dirichlet boundary conditions is considered. By applying the normal form theory and the center manifold reduction for partial functional differential equations (PFDEs), the stability of bifurcated periodic solutions occurring through Hopf bifurcations is studied. It is shown that the bifurcated periodic solution occurring at the first bifurcation point is orbitally asymptotically stable on the center manifold while those occurring at other bifurcation points are unstable. Finally, some numerical simulations to a special example are included to verify our theoretical predictions.

On the Reducibility of a Class of Quasi-Periodic Hamiltonian Systems with Small Perturbation Parameter Near the Equilibrium

Abstract: In this paper, we consider the following nonlinear analytic quasi-periodic Hamiltonian system $$\begin{aligned} \dot{x}=(A+\varepsilon Q(t))x+\varepsilon g(t)+h(x,t),~x\in R^{2n}, \end{aligned}$$ where A is a constant matrix with multiple eigenvalues, \(h=O(x^2)(x\rightarrow 0)\), and h(x, t), Q(t) and g(t) are analytic quasi-periodic on \(D_\rho \) with respect to t. Under suitable hypothesis of analyticity, non-resonant conditions and non-degeneracy conditions, by a quasi-periodic symplectic transformation, Hamiltonian system can be reducible to a quasi-periodic Hamiltonian system with an equilibrium.