Xinjiang Institute of Engineering

Urunchi, China

Xinjiang Institute of Engineering

Urunchi, China

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Li W.,Xinjiang Institute of Engineering
Journal of Physics B: Atomic, Molecular and Optical Physics | Year: 2017

The dynamics of the H + HBr(v = 0, 1, j = 0) → H2 + Br reaction was investigated in detail at the state-to-state level on a new ab initio potential energy surface (Y Kurosaki and T Takayanagi, private communication). A newly developed graphics processing unit (GPU)-accelerated time-dependent wave packet program was applied to calculate product vibrational state-resolved integral cross sections and differential cross sections for collision energies ranging from 0.05 eV to 1.4 eV. The reaction mechanism was also fully analyzed with respect to the structures of the differential cross sections. The state specific integral cross section and differential cross section of H + HBr(v = 0, j = 0) is remarkably different from that for H + HBr(v = 1, j = 0). © 2017 IOP Publishing Ltd.

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.

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.

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 .

Yao H.-B.,Xinjiang Institute of Engineering | Li W.-L.,Xinjiang Institute of Engineering | Zhang J.,Xinjiang Institute of Engineering | Peng M.,Xinjiang Institute of Engineering
Wuli Xuebao/Acta Physica Sinica | Year: 2014

Control of molecular dynamics in an intense laser field has been studied by employing the time-dependent wave packet approach. A system of K2 molecule in three states (ground state |X>, excited state |B> and ionized state |X+>) serves as a prototype which interacts with pump-probe laser fields. Interacting with an intense pump field, the excited state |B> splits into two substates: α> and |β>. Information of the energies and probability distributions of dresses states α> and |β> can be obtained by analysing the photoelectron spectra (PES) of K2 molecule. Meanwhile, the scheme of selective population of dressed states (SPODS) has been put forward according to the dressed states theory of K2 molecule. It is found that regulating the laser intensity can control the dressed state energies, and altering the laser wavelength can make the high selectivity of the dressed state population readied. © 2014 Chinese Physical Society

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.

Li P.,Xinjiang University | Zhao H.,Xinjiang Institute of Engineering
Proceedings of the International Conference on Asian Language Processing 2014, IALP 2014 | Year: 2014

Imperative sentences with assertive mood(ISAM), being positioned between typical declarative sentences and typical imperative sentences, appear as declarative sentences, but perform the function of imperative sentences. They are characterized by their verbs indicating action classification and the verbs are named 'performative verbs'. The essay firstly explains why an imperative sentence with assertive mood can perform imperative function considering its formation and reveals the way an imperative sentence with assertive mood takes to transform from a declarative sentence to an imperative sentence. Secondly, performative verbs are categorized and their distances with imperative function are presented. Finally, based on the elements attached to the performative verbs, ISAM are classified into four categories. © 2014 IEEE.

Ma Q.-X.,Xinjiang Institute of Engineering | Meng J.-X.,Xinjiang Institute of Engineering | Yang L.,Xinjiang Institute of Engineering | Cao W.,Harbin Celebrate Geo Electrical Materials Ltd Joint Stock Companies
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2013

The nickel and cobalt manganese composite hydroxide(Ni0.5Co0.2 Mn0.3(OH)2) and LiNi0.5Co0.2Mn0.3O2 cathode materials were prepared by the solid state sintering synthesis and liquid phase coprecipitation. The structure and electrochemical performance were characterized by X-ray diffractometry and electrochemical properties test. The results show that the cathode material LiNi0.5Co0.2Mn0.3O2 has α-NaFeO2 structure. The highest initial discharge capacity is 175 mA?h/g at current density of 20 mA?h/g in 2.7-4.3 V (vs Li/Li+), while the coulombic efficiency is 89%-90%. When the initial discharge capacity is at the range of 160-170, the capacity does not fade after 30 cycles. When n(Li)/n(Ni+Co+Mn) are 1.03-1.09, the discharge specific capacity decreases little with molar ratio of Li to M increasing. When molar ratio of Li to M is bigger than 1.09, the cycling performance, mean voltage and discharge plateau begin to fade.

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

An approach to the evaluation of the two-electron repulsion integrals exactly in sine finite basis representation is proposed. The two-electron coulomb potential integrals are calculated respectively in sine finite basis representation by using two-fold Gaussian quadrature rules and in discrete variable representation by using the natural potential expansion of coulomb potential r12. The efficiency and accuracy of two methods to calculate the two-electron repulsion integrals are compared. Some demonstrative calculations indicate that both the two ways are effective methods to do two-electron integrals calculations in the multi-configuration time-dependent hartree fock (MCTDHF) frame. By using the method to calculate the two-electron integrals in sine FBR, the working equations of MCTDHF are propagated in imaginary time. The ground state energy of helium atom obtained in the imaginary propagation is close to the Full Configuration interaction energy calculated by Molpro. © 2013 Springer Science+Business Media New York.

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.

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