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Particuology 2015年第5期13卷 72-81页

作者： k.Mahalik Y.k.Mohanty k.C.Biswal g.k.Roy J.N.Sahu Department of Chemical Engineering Gandhi Institute of Engineering and Technology Department of Chemical Engineering National Institute of Technology Department of Chemical Engineering Faculty of EngineeringUniversity of Malaya Petroleum and Chemical Engineering Programme Area Faculty of EngineeringInstitut Teknologi Brunei(A Technology University)

The present paper describes the statistical modeling and optimization of a multistage gas-solid fluidized bed reactor for the control of hazardous pollutants in flue gas. In this work, we study the hydrodynamics of the pressure drop and minimum fluidization velocity. The hydrodynamics of a three-stage fluidized bed are then compared with those for a single-stage unit. It is observed that the total pressure drop over all stages of the three-stage fluidized bed is less than that of an identical single-stage system. However, the minimum fluidization velocity is higher in the single-stage unit. Under identical conditions, the minimum fluidization velocity is highest in the top bed, and lowest in the bottom bed. This signifies that the behavior of solids changes from a well-mixed flow to a plug-flow, with intermediate behavior in the middle bed.

关键词： Fluidized bed Multi-stage Pressure drop Minimum fluidization velocity Optimization

Analysis of Melting Heat Transport in a Cross Flow Direction:A Comparative Study

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Communications in Theoretical Physics 2018年第12期69卷 777-784页

作者： g.k.ra.es. S.A.Shehzad Department of Mathematics K.L.E'S J.T.College Department of Mathematics COMSATS Institute of Information Technology

An incompressible three-dimensional laminar flow in a cross flow direction is described in this work. The term of melting and viscous dissipation is incorporated in the mathematical modeling of present flow problem. The flow expressions are converted into dimensionless equations, which are solved with help of Runge-kutta scheme. Impact of the emerging parameters on the non-dimensional velocities and temperature and friction-factors and local Nusselt number are examined. The convergence analysis is found for ε rative analysis is made between the obtained results and published data for limiting case. It is explored at the surface that the melting parameter retards the liquid temperature while it enhances the fluid velocity.

关键词： melting effect cross flow moving plate viscous heating numerical solution

The dynamics of a nanosecond gas discharge development with an extended slot cathode in argon

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Plasma Science and Technology 2020年第12期22卷 78-88页

作者： N A ASHURBEkOV k O IMINOV g S SHAkHSINOV M Z ZAkARYAEVA k M raBADANOV Dagestan State University Faculty of PhysicsMakhachkala 367000Russia Institute of Physics DFRC of RASMakhachkala 367015Russia

The article presents the results of an experimental study and numerical modelling for the formation and development dynamics of a high-voltage transverse nanosecond discharge generated by a slot cathode in an argon medium at a pressure range of 1–10 Torr. Numerical modelling was carried out under similar experimental conditions for the processes of formation and propagation of ionisation waves, electron density distribution, excited atom and average electron energy in the discharge gap, including the cavity inside the cathode. At a pressure of p=1 Torr, a classical version of a high-voltage discharge is demonstrated to take place with no penetration of the plasma into the cathode cavity and no observed hollow cathode effect. An increase in gas pressure to 5 Torr leads to a penetration of plasma into the cathode cavity with the formation of a cathodic potential drop(CPD) region. Electrons emitted from the side surfaces of the cavity pass through the CPD region without collisions, oscillate inside the cathode cavity;the hollow cathode effect is fully manifested. At р=10 Torr, the modelling results qualitatively coincide with the results at р=5 Torr;in this case, however, hardly any accelerated electrons are observed in the gap between the electrodes, due to their energetic relaxation both inside the cathode cavity and when exiting from it. In both cases, the plasma structure formed at the exit of the cathode cavity involves a concentration of charged particles an order of magnitude higher than that in the rest of the gap, leading to a self-limiting discharge current effect. The results of the numerical modelling are in good agreement with experimental data.

关键词： nanosecond gas discharge numerical simulation argon excited atoms

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Communications in Theoretical Physics 2017年第3期67卷 327-336页

作者： g.Nath P.k.Sahu Department of Mathematics Motilal Nehru National Institute of Technology Allahabad Allahabad-211004Uttar Pradesh India

A self-similar flow behind a cylindrical shock wave is studied under the action of monochromatic radiation in a rotational axisymmetric dusty gas. The dusty gas is taken to be a mixture of small solid particles and perfect gas,and solid particles are continuously distributed in the mixture. The similarity solutions are obtained and the effects of the variation of the radiation parameter, the ratio of the density of solid particles to the initial density of the gas, the mass concentration of solid particles in the mixture and the index for the time dependent energy law are *** is observed that an increase in the radiation parameter has decaying effect on the shock waves; whereas the shock strength increases with an increase in the ratio of the density of solid particles to the initial density of the gas or the index for the time dependent energy law. Also, it is found that an increase in the radiation parameter has effect to decrease the flow variables except the density and the azimuthal component of fluid velocity. A comparison is also made between rotating and non-rotating cases.

关键词： rotating dusty gas self-similar flow shock wave monochromatic radiation

Liver graft procurement in neurologically deceased donor:Hospital Italiano of Buenos Aires approach

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Hepatobiliary & Pancreatic Diseases International 2022年第1期21卷 80-82页

作者： Juan glinka Carolina Vanetta Juan Pekolj Juan Mattera Eduardo de Santibañes Martín de Santibañes Department of general Surgery Hospital Italiano de Buenos AiresBuenos AiresArgentina Section of HPB Surgery&Liver Transplantation Unit Hospital Italiano de Buenos AiresBuenos AiresArgentina

To the Editor:Liver procurement(LP)from a neurologically deceased donor(NDD)is one of the most important spotlights in liver transplanta-tion(LT)[1,2].The commonly used approaches include the“rapid”en-bloc dissection,the in vivo normothermic dissection,or a com-bination of both,according to the preferences and/or the experi-ence of the LP/LT team.A correct LP is essential to achieve optimal *** the counterpart,defective execution of any of its steps can leave the liver graft unusable and/or cause severe complica-tions in the recipient[3].

关键词： Liver neurological dissection

gABOR ANALYSIS OF THE SPACes M(p,q,w)(R^d) AND S(p,q,r,w,ω)(R^d)

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Acta Mathematica Scientia 2011年第1期31卷 141-158页

作者： Ayse Sandιkι A.Turan grkanlι Department of Mathematics Faculty of Arts and Sciences Ondokuz Mayιs University

Let g be a non-zero rapidly decreasing function and w be a weight function. In this article in analog to modulation space, we define the space M（p, q, w）（Rd） to be the subspace of tempered distributions f ∈ S′（Rd） such that the gabor transform Vg（f） of f is in the weighted Lorentz space L（p, q, wdμ）（R2d）. We endow this space with a suitable norm and show that it becomes a Banach space and invariant under time frequence shifts for 1 ≤ p, q ≤ ∞. We also investigate the embeddings between these spaces and the dual space of M（p, q, w）（Rd）. Later we define the space S（p, q, r, w, ω）（Rd） for 1 p ∞, 1 ≤ q ≤ ∞. We endow it with a sum norm and show that it becomes a Banach convolution algebra. We also discuss some properties of S（p, q, r, w, ω）（Rd）. At the end of this article, we characterize the multipliers of the spaces M（p, q, w）（Rd） and S（p, q, r, w, ω）（Rd）.

关键词： gabor transform weigted Lorentz space multiplier

The law as it relates to subsidence as a consequence of mining activity in Britain

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中国有色金属学会会刊：英文版 2005年第S1期15卷 258-261页

作者： g. T. Powell k. Leighfield University of glamorgan Wales United KingdomUniversity of Glamorgan Wales United Kingdom

Subsidence as a consequence of mining activity has been an onerous problem associated with mineral extraction in Britain. Mining law as it relates to subsidence has developed over several centuries. This paper will outline the legal implications for mineral subsidence and compensation, considering both common law and statute. Particular reference is made to the extraction of coal, salt in brine, protection of public utilities, working facilities orders, ironstone and ancient mining rights.

关键词： subsidence compensation coal working facilities orders

The role of associating liver partition and portal vein ligation for staged hepatectomy in the management of patients with colorectal liver metastasis

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Hepatobiliary Surgery and Nutrition 2020年第6期9卷 694-704页

作者： Juan glinka Victoria Ardiles Juan Pekolj Eduardo de Santibañes Martin de Santibañes Department of general Surgery Hepato-Bilio-Pancreatic&Liver Transplantation Unit Hospital Italiano de Buenos AiresBuenosAiresArgentina

Associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)approach emerged as a promising surgical strategy for rapid and large hypertrophy of the future liver remnant(FLR)when a major liver resection is *** liver metastasis(CRLM)is their main ***,the promising results published so far,are very difficult to interpret since they usually focus on the technique and not on the underlying ***,they are usually made up of complex populations,which received different chemotherapy schemes,with the ALPPS technical variations implemented over time and without consistent long-term follow-up results as ***,its role in CRLM should be analyzed as carefully as possible to indicate and select the best candidates who will benefit the most from this *** conducted a computerized search using PubMed and google Scholar for reports published so far,using mesh headings and keywords related to the ALPPS and CRLM.

关键词： Liver resection associating liver partition and portal vein ligation for staged hepatectomy(ALPPS) colorectal cancer metastasis liver regeneration

Soil quality assessment for desertification based on multi-indicators with the best-worst method in a semi-arid ecosystem

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Journal of Arid Land 2023年第7期15卷 779-796页

作者： Orhan DENgİZ İnci DEMİraĞTUraN Department of Soil Science and Plant Nutrition Faculty of AgricultureOndokuz Mayıs UniversitySamsun-55139Turkey Department of geography Faculty of EconomicAdministrative and Social SciencesSamsun UniversitySamsun-55030Turkey

Since there are some signs of land degradation and desertification showing how soil sustainability is threatened, it is crucial to create a soil quality index(SQI) model in the semi-arid ?orum Basin, situated between the Black Sea and Anatolia Region, Central Turkey. The primary aims of the study are:(1) to determine SQI values of the micro-basin in terms of land degradation and ***, the best-worst method(BWM) was used to determine the weighting score for each parameter;(2) to produce the soils' spatial distribution by utilizing different geostatistical models and gIS(geographic information system) techniques;and(3) to validate the obtained SQI values with biomass reflectance values. Therefore, the relationship of RE-OSAVI(red-edge optimized soil-adjusted vegetation index) and NDVI(normalized difference vegetation index) generated from Sentinel-2A satellite images at different time series with soil quality was examined. Results showed that SQI values were high in the areas that had almost a flat and slight slope. Moreover, the areas with high clay content and thick soil depth did not have salinity problems, and were generally distributed in the middle parts of the basin. However, the areas with a high slope, poor vegetation, high sand content, and low water holding capacity had low SQI ***, a statistically high positive correlation of RE-OSAVI and NDVI indices with soil quality was found, and NDVI had the highest correlative value for June(R~2=0.802) compared with RE-OSAVI.

关键词： soil quality land degradation desertification best-worst method remote sensing

Characteristics of a gaN-based gunn diode for THz signal generation

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Journal of Semiconductors 2012年第8期33卷 37-43页

作者： R k Parida N C Agrawala g N Dash A k Panda ITER Siksha‘O'Anusandhan University Rengali College Sambalpur University National Institute of Science&Technology

A generalized large-signal computer simulation program for a gunn oscillator has been developed. The properties of a gunn diode oscillator based on the widely explored gaN, are investigated using the developed program. The results show some interesting properties in gaN gunn diodes which are not seen in gaAs and InP diodes. An output power of 1400 kW/cm^2 is achieved from the gaN gunn diode, as compared to 4.9 kW/cm^2 from a gaAs diode.

关键词： gunn devices semiconductor diodes semiconductor materials power gaN