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.


Wang Y.,Xinjiang Institute of Engineering | Bai C.,Beijing Institute of Technology
Baozha Yu Chongji/Explosion and Shock Waves | Year: 2016

The Mei extinction detection system and the self-developed 20 L pulse pneumatic spray multiphase explosion test system were applied to experimentally investigate the explosion parameters of the diethyl ether mist/air mixtures. By regulating pneumatic pressure and designing spray dose, the explosion parameters of the diethyl ether mist/air mixtures with the same particle size and different mass concentrations were obtained including explosion overpressure, explosion temperature and ignition delay time. The results show that when the Sauter mean diameter of diethyl ether mist is 22.90 μm, the lower explosion limit of diethyl ether mist/air mixtures is 80.261 g/m3, the upper explosion limit is 417.34 g/m3, the highest peak overpressure is 0.78 MPa which occurs with the mass concentration as 278.23 g/m3, the highest peak temperature is 1260℃ which occurs with the mass concentration as 228.29 g/m3, and the ignition delay time takes on a U-shaped distribution in the explosion limit range. © 2016, Editorial Board of EXPLOSION AND SHOCK WAVES. All right reserved.


Ren C.,Shandong University | Ren C.,Xinjiang Institute of Engineering | Wang W.,Shandong University | Li G.,Shandong University
Construction and Building Materials | Year: 2017

Sulfoaluminate cement exhibits a good dimensional stability, an early strength, a high strength, a high resistance to chemical attack (from seawater, sulfates and chlorides), a low energy consumption and low carbon-dioxide emissions during production. However, sulfoaluminate cement factories traditionally use limestone, bauxite and gypsum as materials, which places significant pressure on these natural resources. This study aimed to investigate the feasibility of substituting traditional raw materials with industrial solid wastes in sulfoaluminate clinker production. It was achieved by sintering a mixture of industrial solid wastes (coal gangue: 8%–15%, flue gas desulfurization gypsum: 25%–35%, aluminum slag: 30%–35%, carbide slag: 30%–35%) at 1150–1300 °C. The mineralogical composition of the clinker was C4A3S‾, C2S and C4AF. The compressive strength of hydrated specimens reached as high as 75 MPa after a 28 d curing. This research provides a feasible and promising way to produce high-value products using industrial solid wastes and may promote their large-scale utilization. © 2017 Elsevier Ltd


Zhang L.-L.,Xinjiang Institute of Engineering | Li C.-Y.,Xinjiang Institute of Engineering
IOP Conference Series: Earth and Environmental Science | Year: 2017

In order to study the influence of inert gas injection to gas explosion in the process of fire zone sealing, tunnel fire model was established by COMSOL software, and numerical simulation is carried out to study change laws of flow field and concentration field in the process of fire zone sealing. Through comparing the distribution law of flow field and concentration field whether the inert gas injection and different flows, obtained the influence of inert gas injection to gas explosion in the process of fire zone sealing. As the decrease of entrance average wind speed, the maximum wind speed in the centre vertical section of tunnel gradually reduces. when the entrance average wind speed is 1m/s, counter current layer is produced near the fire resource, length and thickness of counter current layer and maximum current speed rises with the declining of the entrance average wind speed, and swirl will be formed when the entrance average wind speed is less than 0.01m/s. In the process of fire zone sealing, the maximum gas concentration in the fire area and on the side of leeward goes up with the declining of the entrance average wind speed, the nitrogen concentration will gradually increase with the declining of entrance average wind speed. © Published under licence by IOP Publishing Ltd.


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


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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