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Bed dynamics of gas-solid fluidized bed with rod promoter

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China Particuology 2007年第4期5卷 261-266页

作者： Awadhesh kumar Gopendra K.roy Department of Civil Engineering National Institute of TechnologyRourkela 769008OrissaIndia Department of Chemical Engineering National Institute of TechnologyRourkela 769008OrissaIndia

The dynamic characteristics of a gas-solid fluidized bed with different rod promoters have been investigated in terms of bed expansion and fluctuation, minimum fluidization velocity and distributor-to-bed pressure drop ratio at minimum fluidization velocity. Experimentation based on statistical design has been carried out and model equations using factorial design of experiments have been developed for the above mentioned quantities for a promoted gas-solid fluidized bed. The model equations have been tested with additional experimental data. The system variables include four types of rod promoters of varying blockage volume, bed particles of four sizes and four initial static bed heights. A comparison between the predicted values of the output variables using the proposed model equation with their corresponding experimental ones shows fairly good agreement.

关键词： Dynamic characteristics Statistical design Gas-solid fluidization Rod promoter

Transportation Problem with Multi-choice Cost and Demand and Stochastic Supply

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Journal of the Operations Research Society of China 2016年第2期4卷 193-204页

作者： Sankar kumar roy Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar UniversityMidnaporeWest Bengal 721102India

This paper analyzes the multi-choice stochastic transportation problem where the cost coefficients of the objective function and the demand parameters of the constraints follow multi-choice *** that the supply parameters of the constraints in a transportation problem(TP)follow logistic *** main objective of this paper is to select an appropriate choice from the multi-choices for the cost coefficients of the objective function and the demand of the constraints in the TP by introducing Lagrange’s interpolating polynomial in such a way that the total cost is minimized and satisfies the required *** stochastic programming,the stochastic supply constraints of the TP are transformed into deterministic ***,a non-linear deterministic model is *** Lingo software,the optimal solution of the proposed problem is *** illustrate the methodology,a real-life problem on the TP is considered.

关键词： Transportation problem Multi-choice programming Lagrange’s interpolating polynomial Stochastic programming

Ultrasonically Assisted Cutting of Histological Sections for Reducing the Environmental and Financial Impact of Microtomy

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Chinese Journal of Mechanical Engineering 2022年第3期35卷 200-206页

作者： Dong Wang Daniel De Becker Anish roy Wolfson School of Mechanical and Manufacturing Engineering Loughborough UniversityLoughborough LE113TUUK Department of Engineering College of EngineeringMathematics and Physical SciencesUniversity of ExeterExeter EX44QFUK

Modern-day microtomy requires high precision equipment to thinly section biological *** sectioned tissue must be of good quality not showing cutting tracks or so-called *** quality of these sections is dependent on the blade wear,which is related to the hardness of the tissue sample,cutting angle and cutting speed.A test rig has been designed and manufactured to allow these parameters to be *** has allowed for the blade wear to be analysed and quantified,and this has been completed for both ultrasonically assisted and conventional *** obtained results showed a 25.2%decrease in average blade roughness after 38 cuts when using the ultrasonically assisted cutting *** data also showed no adverse effect on the quality of the slides produced when using this cutting ***,the cutting force measured for both cutting regimes showed that ultrasonically assisted cutting required less force compared to conventional *** the reduction of surface roughness and force,it is possible to state that ultrasonically assisted cutting reduces the wear of the blade,thereby increasing the life of the *** increase of just 10%in blade life would yield a cost saving of approximately 25%thereby reducing the environmental and financial impact of microtomy.

关键词： Microtome Ultrasonically assisted cutting Blade wear

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致敬光辉岁月蒙特利尔塔楼和大码头

室内设计与装修 2024年第11期 60-65页

作者： [加拿大]Provencher_roy James Brittain(摄影) Stephane Brugger(摄影) Olivier Blouin(摄影) Nanne Springer(摄影) 西溪(编译) oy Provencher

亚历山德拉码头于1899年建成,曾是蒙特利尔港口最繁忙的粮食出口中心之一,其历史承载着城市繁荣的记忆。随着时间的推移,这里的许多重要基础设施开始逐渐老化,难以满足城市日益增长的旅游产业的需求。在这样的背景下,2013年,Provencher_... 详细信息

亚历山德拉码头于1899年建成,曾是蒙特利尔港口最繁忙的粮食出口中心之一,其历史承载着城市繁荣的记忆。随着时间的推移,这里的许多重要基础设施开始逐渐老化,难以满足城市日益增长的旅游产业的需求。在这样的背景下,2013年,Provencher_roy建筑事务所在蒙特利尔港务局发起的设计竞赛中脱颖而出,承担起码头现代化改造的重任。新设计为游客提供了一个进入这座历史城市的新门户,也为当地居民打造一处放松休闲的新场所。

关键词：粮食出口城市繁荣当地居民建筑事务所现代化改造设计竞赛亚历山德拉重要基础设施

Muscle secretion of toxic factors,regulated by miR126-5p,facilitates motor neuron degeneration in amyotrophic lateral sclerosis

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Neural Regeneration Research 2019年第6期14卷 969-970页

作者： roy Maimon Eran Perlson Department of Physiology and Pharmacology Sackler Faculty of MedicineTel Aviv University

Amyotrophic lateral sclerosis(ALS)is a lethal neurodegenerative disease characterized by neuromuscular junction(NMJ)disruption,motor neuron(MN)axon degeneration,and neuronal ***,there is currently no effective treatment available for ALS and consequently,most patients die several years post *** neurodegeneration that occurs in ALS is considered to be a non-cell autonomous process involving interactions between the motor neuron and its diverse extracellular microenvironments via an unknown *** Axonopathy is one of the early disease signs;however,the involvement and contribution of neighboring tissues and specifically,the muscle environment to the disease pathology remain *** works have concluded that muscles play a minor role or none at all in ALS pathology.

关键词： Muscle secretion toxic factors facilitates motor

Quaternary tectonic control on channel morphology over sedimentary low land:A case study in the Ajay-Damodar interfluve of Eastern India

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Geoscience Frontiers 2015年第6期6卷 927-946页

作者： Suvendu roy Abhay Sankar Sahu Department of Geography University of Kalyani

The style of active tectonic on the deformation and characterization of fluvial landscape has been investigated on three typical skrike-slip fault zones of the Ajay-Damodar Interfluve（ADI） in Eastern India through field mapping,structural analysis and examination of digital topography（ASTER-30 m）,multispectral imageries,and Google Earth images,Channel morphology in Quaternary sediment is more deformed than Cenozoic lateritic tract and igneous rock system by the neotectonic activities,The structural and lithological controls on the river system in ADI region are reflected by distinct drainage patterns,abrupt change in flow direction,offset river channels,straight river lines,ponded river channel,marshy lands,sag ponds,palaeo-channels,alluvial fans,meander cutoffs,multi-terrace river valley,incised compressed meander,convexity of channel bed slope and knick points in longitudinal profile,Seven morphotectonic indices have been used to infer the role of neotectonic on the modification of channel morphology,A tectonic index map for the ADI region has been prepared by the integration of used morphotectonic indices,which is also calibrated by Bouguer gravity anomaly data and field investigation.

关键词： Active tectonic Skrike-slip fault Channel morphology Morphotectonic indices Neotectonic map

Broadband, High Gain, Narrow Width Rectangular Dielectric Resonator Antenna with Air Gap

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Journal of Electronic Science and Technology 2019年第1期17卷 90-96页

作者： Ankit kumar roy Sukla Basu Kalyani Government Engineering College

The broadband, narrow width, rectangular dielectric resonator antenna(RDRA) of aluminum nitride(εr=8.6) was designed and the effect of inclusion of air gap at the bottom of the dielectric resonator antenna(DRA),above the ground plane, was investigated. Gain around 7 dBi was obtained for DRA with air gap(DRAAG) over a broad bandwidth in upper X, Ku, and K bands. Further enhancement in gain could be obtained by placing a metal wall parallel to the length of DRA. However, due to the presence of metal wall, bandwidth was reduced. These structures with the metal wall are capable of operating over a wide band extending from Ku band to lower K band with the gain of around 10 dBi. CST Microwave Studio Software was used to simulate all these *** parameters of DRA with air gap were compared with several broadband DRA structures reported in recent literature. The proposed DRAAG with the metal wall in this paper is capable of operating over a wide bandwidth along with a significant gain.

关键词： Dielectric resonator antenna(DRA) rectangular dielectric resonator antenna(RDRA) wide band dielectric resonator antenna X Ku and K bands dielectric resonator antenna

Computational study of wing deformation and sting interference effects with the CAE-AVM test case

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Chinese Journal of Aeronautics 2018年第10期31卷 1954-1961页

作者： Innokentiy KURSAKOV Egor KAZHAN roy GEBBINK Central Aerohydrodynamic Institute Named After Professor N.E.Zhukovsky(TsAGI) Zhukovskiy 140180Russia German-Dutch Wind Tunnels(DNW) Marknesse 8316 PRThe Netherlands

A modern transonic computational fluid dynamics test case is described in this paper,which is the Aerodynamic Validation Model（AVM） from the Chinese Aeronautical Establishment（CAE）. The CAE-AVM is a representation of a modern transonic business jet aircraft with a design Mach number of 0.85. Numerical simulations for the AVM are conducted for two geometries： one baseline geometry, and one geometry that includes the applied model support system of the wind tunnel as well as the deformed wing shape that occurred during wind tunnel testing. The combined influence of wing deformation and model support interference on local and integral aerodynamic features is presented. Comparisons between CFD and experimental results are made; reasons of discrepancy between results from considered cases are analyzed.

关键词： Aerodynamic validation model CFD Sting interference Transonic test Wing deformation

Biological analysis of an innovative biodegradable antibiotic eluting bioactive glass/gypsum composite bone cement for treating experimental chronic MRSA osteomyelitis

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Journal of Pharmaceutical Analysis 2022年第1期12卷 164-177页

作者： Surajit Mistry Subhasish Burman Subhasis roy Nilendu Jyoti Maitra Rajiv roy Abhijit Chanda Department of Periodontics Burdwan Dental College&HospitalBurdwan713101India Department of Oral&Maxillofacial Surgery Burdwan Dental College&HospitalBurdwan713101India Department of Veterinary Clinical Complex(Surgery&Radiology) West Bengal University of Animal&Fishery SciencesKolkata700037India Directorate of Research Extension&Farms West Bengal University of Animal&Fishery SciencesKolkata700037India Department of Orthopaedics Calcutta National Medical College&HospitalKolkata700014India School of Bio-Science&Engineering Jadavpur UniversityKolkata734432India

A multi-barrier antibiotics loaded biodegradable composite bone cement for resolving chronic osteomyelitis has been studied to understand the physico-mechanical properties,drug loading/eluting efficiency,and different merits and demerits prior to clinical *** successful induction of bone infection in 28 rabbits using methicillin-resistant Staphylococcus aureus(MRSA)strains,calcium sulfate/bioactive glass based composite cement was implanted in 12 defects to assess its performance over parenteral therapy with microscopic and radiological examination for 90 *** composite cement revealed acceptable physico-mechanical properties and controlled drug elution ***,the antibiotics concentrations in bone up to 42 days were sufficient to kill MRSA without eliciting adverse drug *** striking feature of platelets aggregation by composite cement could assist bone *** controlled degradation with simultaneous entrapment of composite cement within the osteoid tissues and complete repair of infected cortical defects(holes)in rabbit tibia at 6 weeks indicated the excellent anti-infective and osteoconductive properties of composite ***,the animal study demonstrated the superiority of composite over injectable antibiotic therapy based on infection resolution and bone *** thereby conclude that the composite cement can be effectively applied in the treatment of resistant cases of chronic osteomyelitis.

关键词： Antibiotics Biodegradable composite Osteomyelitis MRSA strains Osteoconduction