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 & Computer science. The organization has 1696 authors who have published 1521 publications receiving 13541 citations.

Coupling effects of porosity and particle size on seepage properties of broken sandstone based on fractional flow equation

Abstract: Studying the seepage properties of broken rock is important for understanding the behavior of engineering projects and preventing seepage disasters from occurring. Therefore, a test system was developed to test the seepage properties of broken rock under different porosities and particle sizes. A non-linear seepage equation of broken rock was developed based on the Forchheimer equation and the theories of fraction calculus. The influence of the coupling mechanism of the porosity and particle size on the seepage properties of broken rock was analyzed. The results show that the non-linear seepage equation can describe the non-linear seepage properties of broken rock well. The relations between the permeability and the porosity and particles size can all be represented through an exponential function. It is thought that watercourses are developed in broken rock with high porosity and large particle size, which shows a stronger hydraulic conductivity capability. However, the inertial potential energy of a non-Darcy flow is relatively small.

Energy levels and transition probabilities of N + , F 3+ , and Ne 4+ ions

Abstract: Abstract Term energies, oscillator strengths, transition probabilities, and transition wavelengths among the low-lying states of (1s2)2s22p2, 2s22p3p, 2s2p3, 2s22p3s, and 2s22p3d 1,3,5L L = S, P, D, F in N+, F3+, and Ne4+ ions were calculated by using the multiconfiguration Rayleigh-Ritz variation method and restricted variation method. The transition oscillator strengths and transition probabilities for the electric dipole transitions are both given in length and velocity gauges. Deviations between these two gauge values are discussed. The calculated atomic parameters are in good agreement with the observed experimental results and other theoretical data. Furthermore, the uncertainty of each electric dipole transition is estimated. Several uncertainties of transition parameters are improved when comparing with values from national institute of standards and technology NIST database. Atomic parameters presented in this paper should be useful for identifying the levels as well as for precise spectral modeling in astrophysical and laboratory plasmas in the future work.

Comprehensive Evaluation of A Certain River Water Quality in Southern China Based on Artificial Bee Colony-Projection Pursuit

Abstract: Water quality evaluation is a hot issue in the present study,which is part of a comprehensive evaluation of multiple factors.In this paper,the comprehensive evaluation of water quality of a certain river in southern China is conducted by using artificial bee colony-projection pursuit.The sampling time is from March to April,2013 and the sampling sites is in the upstream,midstream and downstream of the river.Six evaluation indicators,i.e.ammonia nitrogen,total phosphorus,total nitrogen,COD,nitrate and nitrite,are selected according to the measured data.A comprehensive evaluation model is establised by using artificial bee colony-projection pursuit and referencing to the national surface water environmental standards.The above model is solved by MATLAB.The evaluation result is that from upstream to downstream,the water quality is at the 1st,4th and 5th grade of the national surface water quality standard.It will provide a scientific basis to develop water pollution control decisions.