3,829 research outputs found
Power-partible Reduction and Congruences for Schr\"oder Polynomials
In this note, we apply the power-partible reduction to show the following
arithmetic properties of large Schr\"oder polynomials and little
Schr\"oder polynomials : for any odd prime , nonnegative integer
, and with
, we have Comment: 1
Effect of Explosive Sources on the Elastic Wave Field of Explosions in Soils
A seismic wave is essentially an elastic wave, which propagates in the soil medium, with the strength of initial elastic wave being created by an explosion source that has a significant effect on seismic wave energy. In order to explore the explosive energy effect on output characteristics of the elastic wave field, four explosives with different work capacity (i.e., TNT, 8701, composition B and THL) were used to study the effects of elastic wave pressure and rise time of stress wave to the peak value of explosions in soils. All the experimental data was measured under the same geological conditions using a self-designed pressure measuring system. This study was based on the analysis of the initial pressure of elastic waves from the energy output characteristics of the explosives. The results show that this system is feasible for underground pressure tests, and the addition of aluminum powder increases the pressure of elastic waves and energy release of explosions in soils. The explosive used as a seismic energy source in petroleum and gas exploration should have properties of high explosion heat and low volume of explosion gas products.Defence Science Journal, 2013, 63(4), pp.376-380, DOI:http://dx.doi.org/10.14429/dsj.63.277
Further understanding the nature of within a chiral quark model
In our previous works, we have analyzed the two-body strong decays of the
low-lying baryon states within a chiral quark model. The results show
that the resonance favors the three-quark state with
classified in the quark model. With this assignment, in the present work we
further study the three-body strong decay and coupled-channel effects on from nearby
channels , and within the chiral
quark model as well. It is found that the resonance has a
sizeable decay rate into the three-body final state . The
predicted ratio is close to the up limit measured by the Belle
Collaboration in 2019, however, our predicted ratio is too small to be
comparable with the recent data . Furthermore, our results show
that the coupled-channel effects on the is not large, its
components should be dominated by the bare three-quark state, while the
proportion of the molecular components is only . To clarify the
nature of , the ratio is
expected to be tested by other experiments.Comment: 7 pages, 3 figure
Quantity Management of Stock Based on BOM
It is an instinct requirement of the enterprise management to lower the cost so that the enterprise can optimize the asset efficiency. To enhance competition ability and enlarge the market share, enterprises must have a good inventory management system. In this paper, two solutions of inventory management based on bill of material (BOM) have been discussed. One is the accurate quantity and time that globally decided by primary equation of inventory management and the form of material requirement planning (MRP). The other is the stock requirement quantity and the detail structure which is implemented by compound BOM structure. A systematic and quantitative management method for trivial and heavy stock management had been discussed in this paper
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