Hydrogen physisorption in Li-doped single-walled boron nitride nanotube array (SWBNNTA) is investigated in detail with grand canonical Monte Carlo simulations.It indicates that Li-doping is an effective mean to increase hydrogen storage capacity of SWBNNTA.The best doping scheme is studied.It shows that hydrogen storage capacity of Li-doped SWBNNTA at normal temperature and moderate pressure can exceed 2015 object of the U.S.Department of Energy.

By the grand canonical Monte Carlo method,physisorption of hydrogen storage in single-walled boron nitride nanotube arrays(SWBNNTA) at moderate pressure with normal temperature is studied.The influences of tube diameter,distance between tubes and pressure on hydrogen physisorption in SWBNNTA are investigated.It indicates that at normal temperature and moderate pressure the hydrogen storage capacity(mass percent) of SWBNNTA is obviously greater than that of single-walled carbon nanotube arrays,and exceeds the commercial standard presented by U.S.Department of Energy.Corresponding theoretical explanation is given.

We present a randomsuccessive nucleation growth model,a two-and a three-dimensional aggregation generation-by-generation model to investigate percolation properties of fractal aggregations with various neighbor conditions and lattice size.Itshows that the percolationthreshold of fractal aggregationisindependent of the lattice size.It dependents onspatial dimension andneighbor conditions,andis aninherent property of the fractal system.The fractal aggregate grows infinitely withthe same fractaldimension whenthe growth probabilityis equal tothe percolationthreshold.The fractal dimension is just a linear function of thespatial dimension.

The main difficulty of heavy Higgs search through H°→ZZ (WW)→llvv channel at LHC pp collider comes from the large energy loss, so it is impossible to reconstruct its invariant mass by conventional method, its existence can only be seen through Jacobi peak of p_T^Z or m_T distribution. As a phenomenological study based on Monte Carlo simulation, a feed-forward neural network is designed to reconstruct Higgs invariant mass for giving correct M_H mass position and satisfactory width, as well as the background rejection ability. This method is proved to be quite suitable for new praticle search and mass measurement in experiment.

This paper presents a method for sampling six random variables which indicate three emission angles of gamma rays and three gamma rays energies in the simulation test of three photon annihilation of positrons and electrons From the subsamples produced by the sampling mentioned above, frontier distribution and joint distribution about angles and about energies are obtained. Comparing the present results concerned with the known quantum electrodynamics (QED) prediction and experimental data, it is found that the three results are quite in agreement.

In this paper, the Monte Carlo method is used to calculate the energy spectrum of gamma rays emitted in the three photon annihilation of positrons and electrons. Our results are compared with the results of calculation obtained by QED and experiment. These three results mentioned above are in agreement quite well.

A Monte Carlo Method for calculating the total uncertainties and resolving power of Millikan's Oil-Drop Test is presented in this paper. The results of the practical examples indicate that the oil drop test can be used to detect fractional charge. A number of the questions in theory and experiment are discussed.