γ-Re_θt crossflow extension model was applied to conduct numerical simulation of crossflow transition on NLF(2)-0415 infinite swept wing. Effects of Reynolds number, surface roughness, sweep angle on crossflow instability of 3-D boundary layer were studied mainly. It found that γ-Re_θt crossflow extension model predicts 3-D boundary layer transition correctly and calculation results agree well with experiment data. It shows that with increase of Reynolds number or surface roughness, location of crossflow transition onset moves forward. However, with increase of sweep angle, location of crossflow transition onset moves forward firstly and then moves back.

A variable-scale lattice gas automata model for gas-solid two-phase flow is established based on lattice gas automata (LGA)in which macroscopic behavior is described with microscopic gas-solid interactions.A two-dimensional flow field is divided into two.deck hexagon laRiees with different scales,where solid particles and gas pseudo-particles are aligned in lattices for solid and gas respectively.In addition to basic LGA rules.collision and propagation rules ale specifically designed for gas-solid systems,as well as additional evolution rules.A statistical method of macroscopic properties and conversion between model parameters and hydrodynamic properties based on similarity principle aIe established. Simulations of dynamic behaviors of gas-solid two-phase flow in a bubbling fluidized bed with this model show good agreement with experiments as well as simulation results with a two-fluid model.It has less average deviation,which validates the proposed model.

Based on message passing interface (MPI), Autodock code is modified by two parallel methods and applied to dock small molecules XK263 to target HIV-1 protease.The acceleration rate and parallel efficiency are tested with different number of nodes. The improved Autodock codes show a satisfied performance during docking process. Particularly, Scheme Ⅱ has advantages in acceleration rate and parallel efficiency.

An in-core fuel management code package HEX-ICFM is developed for Xi'an Pulsed Reactor.The orthogonal design model and the loading pattern optimization program HEX-ORTH are studied.The cell calculation is performed using WIMS-D/4.A two dimensional hexagonal geometry multigroup nodal theory code SIXTUS-2 is used for core diffusion calculation.The core physical parameters are calculated using HEX-ICFM for the first cycle of Xi'an Pulsed Reactor.With the fuel of end of cycle 3 and 30 fresh fuel rods the optimum loading patterns are calculated for the objective function max(K^BOC_eff)using HEX-ORTH.

The molecular dynamics method is employed to study the sticking and desorption of Xenon atoms from a platinum surface.After constructing correct gas-surface interaction potential,the stochastic classic trajectory method is adopted to solve the motion equation of both gas and solid atoms,then the trajectory and behavior of gas atoms can be obtained.The results show that the sticking probability depends on such factors as wall temperature,gas atom incident enenrgy and interaction potential parameters etc.,the thermal desorption rate of gas atoms from platinum surface satisfies Arrhenius correlation.

A simple circuit model is presented for phase-shifted and single-longitudinal-mode distributed feedback semiconductor lasers. Th is model can be used for DC, AC and transient simulation. The simulated results with this model agree with the reports.

By using lattice calculation code WIMS-D/4,hexagonal nodal diffusion code SIXTUS and the WIMS-N1/N2 library which include the data of the nuclide H in ZrH,Er-166 and Er-167,nuclear safety parameters are analyzed of uranium zirconium hydride pulsed reactor core,power peaking factor and fuel temperature coefficient.

In this paper we calculate the correlation dimensions, entropies, and the largest Lyapunov exponents of homogeneous furbulence signals by making use of the technique of phase space reconstruction with delay coordinates. The results show that this is a kind of deterministic chaos perturbed by the random noise, its underlying attractor is a strange attractor with the background of random noise.