GLOBAL WEAK SOLUTIONS OF THE RELATIVISTIC VLASOV-KLEIN-GORDON SYSTEM IN TWO DIMENSIONS

In this paper we consider the system of classical particles coupled with a Klein-Gordon field in two dimensions.We establish a-priori-bounds on the solutions of this system with initial data satisfying a size restriction derived from conservation of energy.This result,together with the smoothing of"velocity averaging",yields the existence of global weak solutions to the corresponding restricted initial value problem.The size restriction is necessary since energy of the system is indefinite.Finally,we show that the weak solutions preserve the total mass.     

Multifractal PDF analysis for intermittent systems

The formula for probability density functions (PDFs) has been extended to include PDF for energy dissipation rates in addition to other PDFs such as for velocity fluctuations, velocity derivatives, fluid particle accelerations, energy transfer rates, etc., and it is shown that the formula actually explains various PDFs extracted from direct numerical simulations and experiments performed in a wind tunnel. It is also shown that the formula with appropriate zooming increment corresponding to experimental situation gives a new route to obtain the scaling exponents of velocity structure function, including intermittency exponent, out of PDFs of velocity fluctuations.     

目标因子分光光度法同时测定中成药复方五味子中三项活性成分

将目标因子分光光度法应用于五味子提取液中五味子甲素、五味子乙素、五味子醇甲等三项活性成分的同时测定,介绍了基本原理和具体的分析步骤,运用计算机VC 语言对试验数据进行回归分析。试验结果表明,目标因子分光光度法对样品各组分的平均回收率在98.9%-106.7%之间,样品不经分离即可同时测定。     

Temporal Characteristic of M--M Transition Lasers in Strontium Atom Vapour

The kinetic process of Sr atom metastable-metastable transition lasers in He-St longitudinal pulsed discharge is analysed and a concise self-consistent physical model is developed. The temporal evolutions of discharge parameters, main paxticle densities, the electron temperature, and the lasing pulses are numerically calculated. The results provided by the model agree well with the experiment, and the temporal behaviour of each laser pulse is explained successfully by the simulation results.     

Multiple production in pion-nucleus interactions in the additive quark model

An analysis of multiplicity distributions of secondary particles produced in pion-nucleus interactions in the framework of the additive quark model (AQM) is presented. The experimental results on average multiplicities, multiplicity distributions, dispersion and normalized multiplicity etc., at various energies, are satisfactorily reproduced by the predictions of AQM except for the 〈n_s〉, n_g correlation.     

Energy recovery from municipal solid waste incineration—A review

Heat recovery from the incineration of municipal solid waste (MSW) can make a useful contribution to the nation's energy needs. This paper reviews the literature on the field of energy recovery from MSW incineration. This review includes (1) An historical background on the MSW methods of disposal and the recent trends. (2) The potential role of waste as a fuel from the knowledge of its analysis, heating value and quantity. (3) The alternative methods of waste disposal including the thermal (mass incineration, refuse-derived fuel and pyrolysis), the mechanical and the biochemical processes. (4) Some economic considerations regarding MSW disposal costs. (5) The combustion characteristics of MSW and waste combustion plants. (6) Heat recovery from waste burning including the main types of waste heat boilers; the heat recovery rates; heat exchange boundary conditions; fouling, erosion and corrosion of waste heat boilers; control of waste incineration particulate emissions and finally the control of nitrogen oxides emissions. The intensive data given here is essential to the proper design and operation of any MSW-to-energy plant. The design needs to be undertaken with careful consideration of the experience that already exists in order to achieve success.