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CFD-DEM analysis of particle polydispersity on the performance of fluidised bed reactor during silane pyrolysis Author links open overlay panel

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Particuology 2024年第8期91卷 72-87页

作者： Akshayveer vijay M.Shinde MS2Discovery Interdisciplinary Research Institute Wilfrid Laurier UniversityWaterlooOntarioN2L3C5Canada Department of Chemical Engineering Indian Institute of Technology(BHU)Varanasi221005India

A CFD-DEM model is developed for chemical vapour deposition of silane in a fluidized bed reactor to investigate the effect of polydispersity on local phase dynamics,mass and heat transport,as well as the rate of Si *** gas-phase fines formation and heterogeneous deposition on the seed particle,as well as the scavenging effect for Si particle growth,are *** method is first validated against the experimentally measured Si deposition rate,percentage of fine production and minimum fluidisation ***,the properties,primarily particle intermixing,fluidisation behaviour and bubble dynamics along with the deposition process,are analyzed for several polydisperse beds under various operating *** effect of polydispersity of the bed on a fraction of the bubble size,dense phase expansion and interchange coefficient between various phases is thoroughly investigated to establish a correlation with reactor *** results show that broad-Gaussian particle size distribution(PSD)exhibits excellent improvement in fluidisation behaviour,resulting in a high deposition rate,and minimum formation of Si fines.

关键词： CFD-DEM method Chemical vapour deposition(CVD) Particle size distribution Silicon Gas-solid fluidized bed

Heat transfer during droHeat transfer during droplet impact on a cold superhydrophobic surface via interfacial thermal mappingplet impact on a cold superhydrophobic surface via interfacial thermal mapping

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Droplet 2024年第3期3卷 71-79页

作者： vijay Kumar Qianxi Fu Harrison Szeto Yangying Zhu Department of Mechanical Engineering University of California Santa BarbaraSanta BarbaraCaliforniaUSA Department of Chemistry and Biochemistry University of California Santa BarbaraSanta BarbaraCaliforniaUSA

Undesired heat transfer during droplet impact on cold surfaces can lead to ice formation and damage to renewable infrastructure,among *** address this,superhydrophobic surfaces aim to minimize the droplet surface interaction thereby,holding promise to greatly limit ***,the dropletimpact on such surfaces spans only a few milliseconds making it difficult to quantify the heat exchange at the droplet–solid ***,we employ high-speed infrared thermography and a three-dimensionaltransient heat conductionCOMSOL modelto map the dynamic heat flux distribution during droplet impact on a cold superhydrophobic *** comprehensive droplet impact experiments for varying surface temperature,droplet size,and impacting height reveal that the heat transfer effectiveness(Q′)scales with the dimensionless maximum spreading radius as Q′∼(Rmax∕Ri)1.6,deviating from previous semi-infinite ***,despite shorter contact times,droplets impacting from higher heights demonstrate increased heat transfer effectiveness due to expanded contact *** results suggest that reducing droplet spreading time,as opposed to contact time alone,can be a more effective strategy for minimizing heat *** results presented here highlight the importance of both contact area and contact time on the heat exchange between a droplet and a cold superhydrophobic surface.

关键词： surface. hydrophobic transfer

Clinical-DnA Correlates of Anxiety in Patients with Ehlers-Danlos Syndrome

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Open Journal of Psychiatry 2024年第4期14卷 319-333页

作者： Golder n. Wilson vijay S. Tonk Department of Pediatrics Texas Tech University Health Sciences Center Lubbock TX USA Kinder Genome Genetics Private Practice Dallas TX USA Medical Genetics and the Cytogenomic Laboratory Department of Pediatrics Texas Tech University Health Sciences Center Lubbock TX USA

Introduction: Anxiety disorders have a lifetime prevalence of 34% with a similar level of heritability (31%) yet lack objective markers that could differentiate patients with underlying conditions. Up to 60%-70% of patients with Ehlers-Danlos syndrome have anxiety that meets criteria of generalized anxiety disorder, their clinical-DnA findings worth examining as biomarkers for patients with generalized anxiety. Method: Of the 1899 patients diagnosed with Ehlers-Danlos syndrome, 1261 were systematically evaluated for 80 history and 40 physical findings and separated into 826 who reported anxiety and 435 who did not. The most consistently reported or management-directing 60 of these clinical findings were, along with variations in genes relevant to these disorders, examined for association with anxiety. Results: Among the 30 anxiety- associated findings judged most predictive of Ehlers-Danlos syndrome in patients with anxiety were expected ones of adrenergic stimulation (difficulty concentrating-87% frequency and 1.26 anxiety/no anxiety ratio;chronic fatigue-84%, 1.17;sleep issues 69%, 1.52 that are criteria for generalized anxiety disorder) or of cholinergic suppression (e.g., frequent nausea 64%, 1.26). Less associated but more discriminating for underlying disease were those reflective of neuromuscular impact (e.g., chronic daily headaches 76%, 1.12);hypermobility (e.g., awareness of flexibility 72%, 1.03), or skin changes (e.g., elasticity around jaw 71%, 1.06). Anxiety-associated DnA variants included 54 of 88 in collagen type I/V/VII/IX genes, 14 of 16 in sodium channel SCn9A/10A/ 11A genes, 59 of 85 in POLG/MT-DnA genes, and 21 of 28 in profilaggrin- FLG genes that respectively impacted tissue laxity, sensory neural, autonomic-mitochondrial, and autonomic-inflammatory functions. Conclusion: Analysis of pathogenetic mechanisms in Ehlers-Danlos syndrome selected some 50 clinical-DnA findings useful for its diagnosis in those with generalized anxiety disorders.

关键词： Anxiety Generalized Anxiety Disorder Ehlers-Danlos Syndrome Long COVID19 Joint Hypermobility Dysautonomia DnA Testing Whole Exome Sequencing DnA Variant Qualification

Dynamic regulation of the irrigation-nitrogen-biochar nexus for the synergy of yield,quality,carbon emission and resource use efficiency in tomato

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Journal of Integrative Agriculture 2024年第2期23卷 680-697页

作者： Ping’an Zhang Mo Li Qiang Fu vijay PSingh Changzheng Du Dong Liu Tianxiao Li Aizheng Yang School of Water Conservancy&Civil Engineering Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Effective Utilization of Agricultural Water Resources Ministry of Agriculture and Rural Affairs/Northeast Agricultural UniversityHarbin 150030China Department of Biological and Agricultural Engineering&Zachry Department of Civil&Environmental Engineering Texas A&M UniversityTX 77843-117USA national Water and Energy Center UAE UniversityAI Ain999041United Arab Emirates Heilongjiang Agricultural Engineering Vocational College Harbin 150030China

Integrated water and fertilizer management is important for promoting sustainable development of facility agriculture,and biochar plays an important role in guaranteeing food production,as well as alleviating water shortages and the overuse of *** field experiment had twelve treatments and a control(CK)trial including two irrigation amounts(I1,100%ETm;I2,60%ETm;where ETm is the maximum evapotranspiration),two nitrogen applications(n1,360 kg ha^(−1);n2,120 kg ha^(−1))and three biochar application levels(B1,60 t ha^(−1);B_(2),30 t ha^(−1)and B3,0 t ha^(−1)).A multi-objective synergistic irrigation-nitrogen-biochar application system for improving tomato yield,quality,water and nitrogen use efficiency,and greenhouse emissions was developed by integrating the techniques of experimentation and ***,a coupled irrigation-nitrogen-biochar plot experiment was ***,tomato yield and fruit quality parameters were determined experimentally to establish the response relationships between irrigation-nitrogen-biochar dosage and yield,comprehensive quality of tomatoes(TCQ),irrigation water use efficiency(IWUE),partial factor productivity of nitrogen(PFPn),and net greenhouse gas emissions(nGE).Finally,a multi-objective dynamic optimization regulation model of irrigation-nitrogen-biochar resource allocation at different growth stages of tomato was constructed which was solved by the fuzzy programming *** results showed that the application of irrigation and nitrogen to biochar promoted increase in yield,IWUE and PFPn,while it had an inhibitory effect on *** addition,the optimal allocation amounts of water and fertilizer were different under different *** yield of the S1 scenario increased by 8.31%compared to the B_(1)I_(1)n_(2) treatment;TCQ of the S2 scenario increased by 5.14%compared to the B_(2)I_(2)n_(1) treatment;IWUE of the S3 scenario increased by 10.01%compared to the B1I2n2 treatment;PFPn of the S4 scenario increased by

关键词： irrigation-nitrogen-biochar dynamic regulation multi-dimensional target collaboration tomato sustainability

Comparative effectiveness of immunotherapy and chemotherapy in patients with metastatic colorectal cancer stratified by microsatellite instability status

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World Journal of Clinical Oncology 2024年第4期15卷 540-547页

作者： Chen-Gu niu Jing Zhang Aniket-vijay Rao Utsav Joshi Patrick Okolo Department of Internal Medicine Rochester General HospitalRochesterNY 14621United States Department of Psychiatry Rainier SpringsVancouverWA 98663United States Department of Hematology and Medical Oncology Moffitt Cancer CenterTampaFL 33606United States Department of Gastroenterology Rochester General HospitalRochesterNY 14621United States

BACKGROUnD Immunotherapy have demonstrated promising outcomes in patients with high microsatellite instability(MSI)(MSI-H)metastatic colorectal ***,the comparative effectiveness of Immunotherapy and chemotherapy for patients with low MSI(MSI-L),and microsatellite stable(MSS)metastatic colorectal cancer remains *** To investigate immunotherapy vs chemotherapy for treatment of MSI-L/MSS metastatic colorectal cancer,and to evaluate the success of immunotherapy against chemotherapy in managing MSI-H metastatic colorectal cancer during a follow-up of 50 *** We conducted a retrospective cohort study using the national Cancer Database(nCDB)to evaluate the overall survival(OS)of patients with metastatic colorectal cancer treated with immunotherapy or *** study population was stratified by MSI status(MSI-H,MSI-L,and MSS).Multivariable Cox proportional hazard models were used to assess the association between treatment modality and OS,adjusting for potential *** A total of 21951 patients with metastatic colorectal cancer were included in the analysis,of which 2358 were MSI-H,and 19593 were MSI-L/*** the MSI-H cohort,immunotherapy treatment(n=142)was associated with a significantly improved median OS compared to chemotherapy(n=860).After adjusting for potential confounders,immunotherapy treatment remained significantly associated with better OS in the MSI-H cohort[adjusted hazard ratio(aHR):0.57,95%confidence interval(95%CI):0.43-0.77,Pn the MSS cohort,no significant difference in median OS was observed between immunotherapy treatment and chemotherapy(aHR:0.94,95%CI:0.69-1.29,P=0.715).COnCLUSIOn In this population-based study using the nCDB,immunotherapy treatment was associated with significantly improved OS compared to chemotherapy in patients with MSI-H metastatic colorectal cancer,but not in those with MSI-L/MSS metastatic colorectal *** studies are warranted to determine the optimal therapeu

关键词： Immunotherapy Chemotherapy Metastatic colorectal cancer Microsatellite instability national cancer database

Groundwater solute chemistry,hydrogeochemical processes and fluoride contamination in phreatic aquifer of Odisha,India

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Geoscience Frontiers 2021年第3期12卷 234-248页

作者： sudarsan Sahu Utpal Gogoi n.C.nayak Central Ground Water Board SERBhujal BhawanBhubaneswarOdishaIndia

The work investigates the major solute chemistry of groundwater and fluoride enrichment(F^(-))in the shallow phreatic aquifer of *** study also interprets the hydrogeochemical processes of solute acquisition and the genetic behavior of groundwater F^(-)contamination.A total of 1105 groundwater samples collected from across the state from different hydro-geomorphic settings have been analyzed for the major solutes and F^(-) *** is alkaline in nature(range of pH:6.6-8.7;ave.:7.9)predominated by moderately hard to very hard *** cation and anion chemistry stand in the orders of Ca^(2+)>na^(+)>Mg^(2+)>K^(+) and HCO_(3)^(-)>Cl^(-)>SO_(4)^(2-)>CO_(3)^(2-) *** average mineralization is low(319 mg/L).The primary water types are Ca-Mg-HCO_(3) and Ca-Mg-Cl^(-)HCO_(3),followed by na-Cl,Ca-Mg-Cl,and na-Ca-Mg-HCO_(3)^(-)***-halite dissolution and reverse ion exchange are the significant processes of solute *** the geogenic as well as the anthropogenic sources contribute to the groundwater fluoride contamination,*** ratio of na^(+)/Ca^(2+)>1.0 comprises na-HCO_(3)(Cl)water types with F^(-)>1.0 mg/L(range 1.0-3.5 mg/L)where the F^(-)bears geogenic *** relations exist between F^(-)and pH,na^(+),TDS,and HCO_(3)^(-).It also reflects a perfect na-TDS correlation(0.85).The ratio of na^(+)/Ca^(2+)n(F^(-)range:1.0-4.0 mg/L)with the F derived from anthropogenic *** water types include Ca-Mg-HCO_(3)(Cl)varieties which are recently recharged meteoritic water *** F^(-) levels exhibit poor and negative correlations with the solutes in *** na-TDS relation remains poor(0.12).In contrast,the TDS levels show strong correlations with Ca^(2+)(0.91),Mg^(2+)(0.80)and even Cl^(-)(0.91).The majority of the monitoring points with the anthropogenic sources of groundwater F^(-) are clustered in the Hirakud Canal Command area in the western parts of the state,indi

关键词： Groundwater Phreatic Aquifer Quality Odisha India

On Ideal Convergence of Double Sequences in Probabilistic normed Spaces

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Acta Mathematica Sinica,English Series 2012年第8期28卷 1689-1700页

作者： vijay KUMAR Bernardo LAFUERZA-GUILLÉn Department of Mathematics Haryana College of Technology and ManagementKaithal-136027HaryanaIndia Departamento de Estadística y Matem'atica Aplicada Universidad de AlmeríaAlmería 04120Spain

The notion of ideal convergence is a generalization of statistical convecgence which has been intensively investigated in last few years. For an admissible ideal ∮ C n × n, the aim of the present paper is to introduce the concepts of ∮-convergence and ：∮＊-convergence for double sequences on probabilistic normed spaces （Pn spaces for short）. We give some relations related to these notions and find condition on the ideal ∮ for which both the notions coincide. We also define ∮-Cauchy and ：∮＊- Cauchy double sequences on Pn spaces and show that ∮-convergent double sequences are ∮-Cauchy on these spaces. We establish example which shows that our method of convergence for double sequences on Pn spaces is more general.

关键词： Ideal convergence double sequence statistical convergence continuous t-norm and prob- abilistic normed spaces

Approximation by Complex q-Durrmeyer Polynomials in Compact Disks

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Acta Mathematicae Applicatae Sinica 2014年第1期30卷 65-74页

作者： n.I.Mahmudov vijay Gupta Department of Mathematics Eastern Mediterranean University School of Applied Sciences Netaji Subhas Institute of Technology

In this paper, the order of approximation and Voronovskaja type results with quantitative estimate for complex q-Durrmeyer polynomials attached to analytic functions on compact disks are obtained.

关键词： q-complex Durrmeyer polynomials q-integers q-derivatives Voronovskaja-type asymptotic for-mula

Synthesis of Aryl Hydrazines via Cul/BMPO Catalyzed Cross-Coupling ofAryl Halides with Hydrazine Hydrate in Water

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Chinese Journal of Chemistry 2018年第11期36卷 1003-1006页

作者： Siripuram vijay Kumar Dawei Ma State Key Laboratory of Bioorganic and natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences345 Lingling LuShanghai 200032China

The n,n ’‐bis(2,6‐dimethylphenyl)oxalamide was discovered as a powerful ligand for Cu‐catalyzed cross‐coupling of aryl halides with hydrazine hydrate, leading to the formation of a variety of aryl hydrazines at 80 o C in water under the assistance of K 3 PO 4 and 4 mol% cetyltrimethylammonium bromide from aryl bromides and aryl iodides. Good to excellent yields were observed in most cases.

关键词： hydrazine hydrate cross‐coupling aryl halides ligand effects copper synthetic methods