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Liu S.-W.,Henan Polytechnic University | Zhang W.-G.,Xinjiang Institute of Engineering | Feng Y.-L.,Henan Polytechnic University
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2013

Along with the depletion of superficial coal in China, the mining depth is increasing, and the problem of floor heave gets more and more serious. Probing into the problem of slipping floor heave, with the plastic mechanics theory, slipping floor mass is divided into several areas and the calculation formulas of floor breaking depth and critical load is obtained. The stressed characteristic of unit body in the slipping area is analyzed according to the mechanism of bolt action, and the control measure of slipping floor heave is proposed. When applied to practice, the research results can have reference value to field production. Source


Yao H.,CAS Dalian Institute of Chemical Physics | Yao H.,Xinjiang Institute of Engineering | Zhao G.,CAS Dalian Institute of Chemical Physics
Journal of Physical Chemistry A | Year: 2014

The competitive mechanism between dissociation and ionization of hydrogen molecular ion in intense field has been theoretically investigated by using an accurate non-Born-Oppenheimer method. The relative yield of fragments indicates that the dissociation and ionization channels are competitive with the increasing laser intensity from 5.0 × 1013 to 2.0 × 1014 W/cm2. In the case of intensity lower than 1.0 × 1014 W/cm2, the dissociation channel is dominant, with a minor contribution from ionization. The mechanism of dissociation includes the contributions from the bond softening, bond hardening, below-threshold dissociation, and above-threshold dissociation, which are strongly dependent on the laser intensity and initial vibrational state. Furthermore, the ionization dominates over the dissociation channel at the highest intensity of 2.0 × 1014 W/cm2. The reasonable origin of ionization is ascribed as the above-threshold Coulomb explosion, which has been demonstrated by the space-time dependent ionization rate. Moreover, the competition mechanism between dissociation and ionization channels are displayed on the total kinetic energy resolved (KER) spectra, which could be tested at current experimental conditions. © 2014 American Chemical Society. Source


Yu J.,Xinjiang University | Hu C.,Xinjiang University | Jiang H.,Xinjiang University | Fan X.,Xinjiang University | Fan X.,Xinjiang Institute of Engineering
Neural Networks | Year: 2014

In this paper, the global projective synchronization of fractional-order neural networks is investigated. First, a sufficient condition in the sense of Caputo's fractional derivation to ensure the monotonicity of the continuous and differential functions and a new fractional-order differential inequality are derived, which play central roles in the investigation of the fractional adaptive control. Based on the preparation and some analysis techniques, some novel criteria are obtained to realize projective synchronization of fractional-order neural networks via combining open loop control and adaptive control. As some special cases, several control strategies are given to ensure the realization of complete synchronization, anti-synchronization and the stabilization of the addressed neural networks. Finally, an example with numerical simulations is given to show the effectiveness of the obtained results. © 2013 . Source


Li W.,CAS Dalian Institute of Chemical Physics | Li W.,Xinjiang Institute of Engineering
Journal of Mathematical Chemistry | Year: 2013

A parallel quantum electrons wave packet computer code has been developed to study laser-atom interaction in the nonperturbative regime with attosecond resolution. The motion equations of the multi-configuration time-dependent hartree fock (MCTDHF) based on a sine discrete variable representation were solved by using an adaptive stepsize Runge-Kutta integrator of eight orders. Some efficient algorithms and strategies to accelerate the calculation velocity are introduced and discussed in details. Some illustrated imaginary time propagation and real time propagation have been respectively done in the paper. Single ionization probabilities calculated by using this one dimension MCTDHF model underestimate the accurate results calculated by solving time-dependent Schrodinger equation directly. © 2013 Springer Science+Business Media New York. Source


Feng L.-Q.,Liaoning University of Technology | Feng L.-Q.,CAS Dalian Institute of Chemical Physics | Feng L.-Q.,Xinjiang Institute of Engineering | Li W.-L.,CAS Dalian Institute of Chemical Physics | Li W.-L.,Xinjiang Institute of Engineering
Communications in Theoretical Physics | Year: 2015

An efficient method for attosecond extreme ultraviolet source generation under the two-color multi-cycle weak pulse has been theoretically presented by using the concept of the plasmonic field enhancement in the vicinity of metallic nanostructures. The results show that by properly choosing the inhomogeneity of the two-color multi-cycle (20 fs) weak pulse (1013 W/cm2), not only the harmonic cutoff has been extended, resulting in a broadband XUV continuum, but also the single short quantum path has been selected to contribute to the harmonic. As a result, two isolated XUV pulses with durations of 68as and 66as can be obtained. © 2015 Chinese Physical Society and IOP Publishing Ltd. Source

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