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A Novel Approach with Time-splitting spectral Technique for the Coupled schrdinger–Boussinesq Equations Involving Riesz Fractional Derivative

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Communications in Theoretical Physics 2017年第9期67卷 301-308页

作者： s.saha Ray Department of mathematics National Institute Technology

In the present paper the Riesz fractional coupled schr6dinger-Boussinesq （s-B） equations have been solved by the time-splitting Fourier spectral （TsFs） method. This proposed technique is utilized for discretizing the schrodinger like equation and further, a pseudospectral discretization has been employed for the Boussinesq-like equation. Apart from that an implicit finite difference approach has also been proposed to compare the results with the solutions obtained from the time-splitting technique. Furthermore, the time-splitting method is proved to be unconditionally stable. The error norms along with the graphical solutions have also been presented here.

关键词： coupled schrsdinger-Boussinesq equations Riesz fractional derivative discrete fourier transform inverse discrete Fourier transform

Distribution and mode of occurrence of radionuclides in phosphogypsum derived from Aqaba and Eshidiya Fertilizer Industry,south Jordan

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Chinese Journal Of Geochemistry 2010年第3期29卷 261-269页

作者： Al-Hwaiti m.s. Zielinski R.A. Bundham J.R. Ranville J.F. Ross P.E. Environmental Engineering Department Al-Hussein Bin Talal University UsGs DenverCO 80225USA Environmental science and Engineering Division Colorado School of Mines

Phosphogypsum (PG) is a by-product of the chemical reaction called the "wet process" whereby sul-phuric acid reacts with phosphate rock (PR) to produce phosphoric acid, needed for fertilizer production. Through the wet process, some impurities naturally present in the PR become incorporated in PG, including U decay-series radionuclides, are the main important concern which could have an effect on the surrounding environment and pre-vent its safe utilization. In order to determine the distribution and bioavailability of radionuclides to the surrounding environment, we used a sequential leaching of PG samples from Aqaba and Eshidiya fertilizer industry. The results showed that the percentages of 226Ra and 210Pb in PG are over those in the corresponding phosphate rocks (PG/PR), where 85% of the 226Ra and 85% of the 210Pb fractionate to PG. The sequential extraction results exhibited that most of 226Ra and 210Pb are bound in the residual phase (non-CasO4) fraction ranging from 45%-65% and 55%-75%, respectively, whereas only 10%-15% and 10%-20% respectively of these radionuclides are distributed in the most labile fraction. The results obtained from this study showed that radionuclides are not incorporated with gypsum itself and may not form a threat to the surrounding environment.

关键词：天然放射性核素磷石膏化肥工业赋存状态 226Ra 反应产物化肥生产周围环境

Darwin and the cirripedes: Insights and dreadful blunders

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Integrative Zoology 2009年第3期4卷 316-322页

作者： Jean s.DEUTsCH UmR 7622 Developmental Biology Pierre and Marie Curie University(Paris 6)

Charles Darwin’s favorite animals were cirripedes(barnacles).Indeed,he worked intensively on cirripedes during the years he was maturing his thoughts regarding his theory,which eventually led to the publication of The Origin of *** I present some of Darwin’s achievements in the morphology,systematics and biology of these small marine invertebrates,and also,in light of our present knowledge,some mistakes he made.

关键词： cirripedes Darwin homology.

THE sTUDY OF ELECTROLEss NICKEL ACCELERATING AGENT

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Acta metallurgica sinica(English Letters) 1999年第5期12卷 1002-1006页

作者： Q. Zhang, s. Guan and s.m. Li Beijing University Of Aeronautics And Astronautics, Beijing 100083, China

The effects of accelerating agent on the deposition speed of Electroless Nickel Plating, the stability of solution and the corrosion resistant of The EN coatings were studied. The influence of A1 content on EN activation energy, the rest potential and polarization cures are measured. The mechanism of the acceleration effect of A1 on the EN plating was proposed.

关键词： electroless nickel plating accelerating agent

Developing one-dimensional implosions for inertial confinement fusion science

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High Power Laser science and Engineering 2016年第4期4卷 1-7页

作者： J.L.Kline s.A.Yi A.N.simakov R.E.Olson D.C.Wilson G.A.Kyrala T.s.Perry s.H.Batha E.L.Dewald J.E.Ralph D.J.strozzi A.G.macPhee D.A.Callahan D.Hinkel O.A.Hurricane R.J.Leeper A.B.Zylstra R.R.Peterson B.m.Haines L.Yin P.A.Bradley R.C.shah T.Braun J.Biener B.J.Kozioziemski J.D.sater m.m.Biener A.V.Hamza A.Nikroo L.F.Berzak Hopkins D.Ho s.LePape N.B.meezan D.s.montgomery W.s.Daughton E.C.merritt T.Cardenas E.s.Dodd Los Alamos National Laboratory Lawrence Livermore National Laboratory

Experiments on the National Ignition Facility show that multi-dimensional effects currently dominate the implosion performance. Low mode implosion symmetry and hydrodynamic instabilities seeded by capsule mounting features appear to be two key limiting factors for implosion performance. One reason these factors have a large impact on the performance of inertial confinement fusion implosions is the high convergence required to achieve high fusion *** tackle these problems, a predictable implosion platform is needed meaning experiments must trade-off high gain for performance. LANL has adopted three main approaches to develop a one-dimensional(1D) implosion platform where 1D means measured yield over the 1D clean calculation. A high adiabat, low convergence platform is being developed using beryllium capsules enabling larger case-to-capsule ratios to improve symmetry. The second approach is liquid fuel layers using wetted foam targets. With liquid fuel layers, the implosion convergence can be controlled via the initial vapor pressure set by the target fielding temperature. The last method is double shell targets. For double shells, the smaller inner shell houses the DT fuel and the convergence of this cavity is relatively small compared to hot spot ignition. However,double shell targets have a different set of trade-off versus advantages. Details for each of these approaches are described.

关键词： beryllium capsules double shells inertial confinement fusion liquid layers

Characteristics and source of black carbon aerosol over Taklimakan Desert

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science China Chemistry 2010年第5期53卷 1201-1208页

作者： FU s.Joshua Department of Civil and Environmental Engineering The University of Tennessee

Black carbon(BC) and Pm10 in the center of the Taklimakan Desert were online monitored in the whole year of *** addi-tion,TsP samples were also synchronously daily collected by medium-volume samplers with Whatman41 filters in the spring of *** in the dust aerosol was up to 1.14%of the total mass of Pm10.A remarkable seasonal variation of BC in the aerosol was observed in the order of winter>spring>autumn>*** peak value of BC appeared at midnight while the lowest one in the evening each day,which was just the reverse of that in the urban *** contribution of BC to the total mass of Pm10 on non-dust storm days was～11 times of that in dust *** back trajectory and principal component analysis,it was found that BC in the dust aerosol over Taklimakan Desert might be attributed to the emission from the anthropogenic activities,including domestic heating,cooking,combustion of oil and natural gas,and the medium-range transport from those oases located in the margins of the *** total BC aerosol from the Taklimakan Desert to be transported to the eastward downstream was estimated to be 6.3×104 ton yr-1.

关键词： black carbon aerosol the Taklimakan desert long-range transport

Theoretical Approach to Change Blast Furnace Regime With Natural Gas Injection

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Journal of Iron and steel Research International 2013年第9期20卷 40-46页

作者： K s Abdel Halim Central metallurgical Research and Development Institute(CmRDI)

The operation of blast furnace using natural gas and oxygen enriched blast （composite blast technology） is considered in many countries to be standard operation for a modern blast furnace particularly in certain countries with cheap and stable supply of natural gas. The theoretical flame temperature （TFT） of combustion and the degree of di-rect reduction of iron oxides （rd） are considered as the main controlling parameters of composite blast technology. The calculated values of these parameters are mainly dependent on the amount of air blast consumption. This amount of air blast is measured before entering into blast stoves, Actually, some of air blast is lost through valves of air stoves. Consequently, the real volume of air blast in the furnace is less than the recorded value by amounts of 5%-15% which is not considered in the estimation of rd and TFT. The purpose is to analyze the different methods for es-timation of air blast inside the blast furnaces and develop a theoretical model to calculate air blast eonsumption with high accuracy. Based on the calculation of air blast consumption, a complete roadmap is demonstrated to change the operation regime parameters of blast furnaces working on composite blast technology.

关键词： composite blast technique natural gas blast consumption theoretical flame temperature direct reduc-tion degree iron oxide

OsCILLATION AND GLOBAL ATTRACTIVITY OF ImPULsIVE PERIODIC DELAY REsPIRATORY DYNAmICs mODEL

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Chinese Annals of mathematics,series B 2005年第4期26卷 511-522页

作者： s.H.sAKER Department of mathematics Faculty of ScienceMansoura UniversityMansoura 35516Egypt

This paper studies the nonlinear delay impulsive respiratory dynamics model. The model describes the sudden changes of the concentration of CO2 in the blood of the mammal. It is proved that the model has a unique positive periodic solution. somesufficient conditions for oscillation of all positive solutions about the positive periodic solution are established and also some sufficient conditions for the global attractivityof the periodic solution are obtained.

关键词： Periodic solutions Oscillation Global attractivity Respiratory dynamics model Impulsive differential equation

Impact of magnetic Field on a Peristaltic Flow with Heat Transfer of a Fractional maxwell Fluid in a Tube

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Computers, materials & Continua 2022年第9期72卷 6141-6153页

作者： Hanan s.Gafel Department of mathematics Faculty of ScienceTaif UniversitySaudi Arabia

magnetic field and the fractional maxwell fluids’impacts on peristaltic flows within a circular cylinder tube with heat transfer was evaluated while assuming that they are preset with a low-Reynolds number and a long ***,the fractional calculus method,the problem was solved *** was deduced for temperature,axial velocity,tangential stress,and heat transfer *** emerging parameters and their effects on the aspects of the flow were illustrated,and the outcomes were expressed via graphs.A special focus was dedicated to some criteria,such as the wave amplitude’s effect,Hartman and Grashof numbers,radius and relaxation–retardation ratios,and heat source,which were under discussions on the axial velocity,tangential stress,heat transfer,and temperature coefficients across one *** graphs of physical interest were *** outcomes state that the effect of the criteria mentioned beforehand(the Hartman and Grashof numbers,wave amplitude,radius ratio,heat source,and relaxation–retardation ratio)were quite evident.

关键词： Peristaltic flow fractional maxwell fluid mass and heat transfer magneto-hydrodynamic flow