检索结果-南通市图书馆

Journal of Hydrodynamics 2015年第5期27卷 738-747页

作者： BAAG s. ACHArYA M.r. DAsH G.C. mishra s.r. Department of Physics College of Basic Science and HumanitiesOUAT Department of Mathematics ITER SOA University

This work provides a comprehensive theoretical analysis of MHD unsteady free convection viscoelastic fluid flow through a porous medium. The medium is treated as incompressible and optically transparent. The flow of the fluid is initiated by shearing action of the moving wall with time dependent suction. radiative heat flow is considered in temperature equation. The coupled nonlinear problem has been solved asymptotically. Approximate solutions have been obtained for the mean velocity, mean temperature using multi parameter perturbation technique. The originality of the present study is to investigate the effect of viscoelastic property of the fluid（Walters B？ model） on the flow and heat transfer phenomena when the flow is permeated through a porous medium with uniform porous matrix subject to transverse magnetic field and time dependent fluctuative suction at the boundary s.r.ace. The case of viscous flow has been discussed as a particular case on comparison with the result reported earlier and it is in good agreement. Flow reversal is indicated incase of viscoelastic fluid with high heat capacity in the presence of magnetic field. The higher cooling of the plate in case of viscoelastic flow also causes a flow reversal.

关键词： viscoelastic liquid porosity radiation parameter time dependent suction

Practice patterns among ophthalmic s.r.eons in treating concomitant oculoplastic conditions in preoperative period:A questionnaire-based study

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第1期13卷 29-37页

作者： Bijnya Birajita Panda Chitaranjan mishra Bhagabat Nayak Avik Kumar roy Logesh Balakrishnan Priyadarshini mishra Department of Ophthalmology All India Institute of Medical SciencesBhubaneswar 751019OdishaIndia Department of Vitreo-retina Trilochan NetralayaSambalpur 768004India Department of Glaucoma s.r.ices LV Prasad Eye InstituteBhubaneswar 751013India Department of statistics Apollo HospitalsChennai 823104India

BACKGrOUND Addressing oculoplastic conditions in the preoperative period ens.r.s both the safety and functional success of any ophthalmic *** oculoplastic conditions,like nasolacrimal duct obs.r.ction,have been extensively studied,whereas others,like eyelid malposition and thyroid eye disease,have received minimal or no *** To investigate the current practice patterns among ophthalmologists while treating concomitant oculoplastic conditions before any subspecialty ophthalmic *** A cross-sectional s.r.ey was disseminated among ophthalmologists all over *** s.r.ey included questions.r.lated to pre-operative evaluation,anaesthetic and s.r.ical techniques preferred,post-operative care,the use of adjunctive therapies,and patient follow-up *** A total of 180 ophthalmologists.r.sponded to the *** practitioners(89%)felt that the rOPLAs test was sufficient during pre-operative evaluation before any subspecialty s.r.ery was *** most common s.r.ical techniques employed were lacrimal drainage procedures(Dacryocystorhinostomy)(63.3%),eyelid malposition repair(36.9%),and ptosis.r.pair(58.7%).Post-operatively,47.7%of respondents emphasized that at least a 4-week gap should be maintained after lacrimal drainage procedures and eyelid ***-seven percent of ophthalmologists felt that topical anaesthetic procedures should be preferred while performing ocular s.r.eries in thyroid eye disease *** Approximately 50%of ophthalmologists handle prevalent oculoplastic issues themselves,seeking the expertise of an oculoplastic s.r.eon under particular *** ophthalmologists still favor using rOPLAs as a preliminary s.r.ening method before proceeding with cataract *** conditions and thyroid eye disease are not as commonly addressed before subspecialty procedures compared to issues like nasolacrimal duct obs.r.ction and periocular infections.

关键词： Oculoplasty Ophthalmic plastic s.r.ery Nasolacrimal duct obs.r.ction Practice patterns s.r.ey

Effect of friction stir processing on mechanical properties and heat transfer of TIG welded joint of AA6061 and AA7075

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2021年第3期17卷 715-727页

作者： Husain Mehdi r.s.mishra Department of Mechanical Engineering Delhi Technological UniversityDelhiIndia

Tungsten inert gas(TIG) welding is the most commonly used joining process for aluminum alloy for AA6061 and AA7075 which are highly demanded in the aerospace engineering and the automobile sector, but there are some defects occur during TIG welding like micro-crack, coarse grain s.r.cture, and porosity. To improve these defects, the TIG welded joint is processed using friction stir processing(FsP).This paper presents the effect of friction stir processing on TIG welding with filler Er4043 and Er 5356 for dissimilar aluminum alloy AA6061 and AA7075. The mechanical characterization, finite element formulation and mathematical equations of heat transfer of TIG + FsP welded joints are investigated using ANsYs Fluent software by adjusting process parameters of FsP. The results show that the maximum compressive residual s.r.ss 73 MPa was obtained at the fusion zone(FZ) of the TIG weldment with filler Er4043, whereas minimum compressive residual s.r.ss 37 MPa was obtained at stir zone(sZ) of the TIG+ FsP with filler 5356. The maximum heat flux 5.33 × 106 W/m2 and temperature 515C have obs.r.ed at tool rotation 1600 rpm with a feed rate of 63 mm/min. These results give a satisfactory meas.r. of confidence in the fidelity of the simulation。

关键词： residual s.r.ss TIG+FsW Heat transfer Micro-hardness Tensile s.r.ngth

saddle Point Criteria in Nonsmooth semi-Infinite Minimax Fractional Programming Problems

在线全文

学校读者我要写书评

暂无评论

Journal of systems science & Complexity 2018年第2期31卷 446-462页

作者： mishra s K sINGH Yadvendra VErMA r U Department of Mathematics Banaras Hindu University Varanasi-221005 India. Department of Mathematics Texas State University USA

This paper considers a nonsmooth semi-infinite minimax fractional programming problem（sIMFP） involving locally Lipschitz invex functions. The authors establish necess.r. optimality conditions for sIMFP. The authors establish the relationship between an optimal solution of sIMFP and saddle point of scalar Lagrange function for sIMFP. Further, the authors study saddle point criteria of a vector Lagrange function defined for sIMFP.

关键词： Generalized convexity Lagrange function nonsmooth programming problems saddlepoint semi-infinite minimax fractional programming problems.

simultaneous effects of chemical reaction and Ohmic heating with heat and mass transfer over a s.r.tching s.r.ace: A numerical study

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2017年第9期25卷 1137-1142页

作者： s.r.mishra M.M.Bhatti Department of Mathematics Siksha ‘O’ Anusandhan University shanghai Institute of Applied Mathematics and Mechanics Shanghai University

In this article, we have considered the simultaneous influence of ohmic heating and chemical reaction on heat and mass transfer over a s.r.tching sheet. The effects of applied magnetic field are also taken into consideration while the induced magnetic field is not considered due to very small magnetics.r.ynolds number. The governing flow problem comprises of momentum, continuity, thermal energy and concentration equation which are transformed into highly nonlinear coupled ordinary differential equations by means of similarity transforms, which are then, solved numerically with the help of successive Linearization method(sLM) and Chebyshev spectral collocation method. Numerical values of skin friction coefficient, local Nusselt number, and sherwood number are also taken into account with the help of tables. The physical influence of the involved parameters of flow velocity, temperature and concentration dis.r.bution is discussed and demons.r.ted graphically. The numerical comparison is also presented with the existing published results and found that the present results are in excellent agreement which also confirms the validity of the present methodology.

关键词： Ohmic heating Heat and mass transfer Chemical reaction successive linearization method

Energy-and exergy-based performance evaluation of solar powered combined cycle(recompression supercritical carbon dioxide cycle/organic rankine cycle)

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2018年第2期2卷 140-153页

作者： Harwinder singh r.s.mishra Department of Mechanical Production&IndustrialAutomobile EngineeringDelhi Technological UniversityBawana RoadNew Delhi-110042India

Nowadays,the recompression supercritical carbon dioxide(r-sCO_(2))cycle has emerged as a promising option for power conversion systems because of its boundless potential to tackle energy and environmental *** this study,we examined the performance of the solar parabolic trough collector(sPTC)integrated combined cogeneration system for the purpose of power generation as well as.r.covery of waste exhaust heat from the r-sCO_(2) cycle with the help of the organic rankine cycle(OrC).An exergy and energy analysis was performed for a combined recompression cycle(r-sCO_(2)-OrC)by varying the input variables such as intensity of solar irradiation(Gb),press.r. at the inlet of sCO_(2) turbine(P_(5)),mass flow rate of sCO_(2)()&msCO_(2) inlet temperature of sCO_(2) turbine(T5),inlet temperature of main compress.r.T_(9))and effectiveness of the high-and low-temperature recuperator(HTr andLTr).Eight organic working fluids were considered for the OrC:r123,r290,isobutane,r1234yf,r1234ze,toluene,isopentane and *** study revealed that r123-based r-sCO_(2)-OrC demons.r.tes the highest thermal and exergy efficiency:~73.4 and 40.89%at G_(b)=0.5 kW/m^(2);78.8 and 43.9%at P_(5)=14 MPa;63.86 and 35.57%at T5=650 K;74.84 and 41.69%at&msCO 7kg s;2=/85.83 and 47.82%at T_(9)=300 K;84.57 and 47.11%atHTr 65;=0.85.06 and 47.38%atLTr 65,=***,r290 showed the minimum value of exergy and thermal *** can be seen,the maximum amount of exergy des.r.ction or exergy loss occurs in a solar collector field,~58.25%of the total exergy des.r.ction rate(i.e.6703 kW)and 18.99%of the solar inlet exergy(i.e.20562 kJ).Moreover,r123 has the highest net work output,~4594 kJ at T5=650 K and 6176 kJ at T_(9)=300 K.

关键词： sPTC recompression sCO_(2)cycle OrC exergy and thermal efficiency exergy des.r.ction rate organic fluids

A numerical simulation for the control of radiative heat energy and thermophoretic effects on MHD micropolar fluid with heat source

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean Engineering and science 2022年第1期7卷 92-98页

作者： ram Prakash sharma s.r.mishra Department of Mechanical Engineering National Institute of TechnologyArunachal PradeshYupia 791112Papum Pare DistrictArunachal Pradesh Department of Mathematics Siksha‘O’Anusandhan Deemed to be UniversityBhubaneswar 751030OdishaIndia

The current paper explores the behavior of the thermal radiation on the time-independent flow of mi-cropolar fluid past a vertical s.r.tching s.r.ace with the interaction of a transverse magnetic *** ef-fect of thermo-diffusion(s.r.t)along with the heat source is incorporated to enhance the thermal ***,the convective solutal condition is considered that affects the mass transfer *** transformed equations are modeled using suitable similarity ***,the complex cou-pled equations are handled mathematically employing the runge-Kutta-Felhberg *** behavior of characterizing parameters on the flow phenomena as well as the engineering coefficients are displayed via graphs and the validation of the current outcome is.r.ported with the previously published results in particular cases.

关键词： Magnetohydrodynamic Thermal radiation Heat source Thermo-diffusion Chemical reaction runge-Kutta-Felhberg method

Hydromagnetic thin film flow of Casson fluid in non-Darcy porous medium with Joule dissipation and Navier＇s partial slip

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2017年第11期38卷 1613-1626页

作者： G.s.sETH r.TrIPATHI M.K.mishra Department of Applied Mathematics Indian Institute of Technology (India School of Mines) Dhanbad 826004 India

In this paper, the effects of viscous and Ohmic heating and heat genera- tion/abs.r.tion on magnetohydrodynamic flow of an electrically conducting Casson thin film fluid over an unsteady horizontal s.r.tching sheet in a non-Darcy porous medium are investigated. The fluid is assumed to slip along the boundary of the sheet. similar- ity transformation is used to translate the governing partial differential equations into ordinary differential equations. A shooting technique in conjunction with the 4th order runge-Kutta method is used to solve the transformed equations. Computations are car- ried out for velocity and temperature of the fluid thin film along with local skin friction coefficient and local Nusselt number for a range of values of pertinent flow parameters. It is obs.r.ed that the Casson parameter has the ability to enhance free s.r.ace velocity and film thickness, whereas the Forchheimer parameter, which, is.r.sponsible for the inertial drag has an adverse effect on the fluid velocity inside the film. The velocity slip along the boundary tends to decrease the fluid velocity. This investigation has various applications in engineering and in practical problems such as very large scale integration （VLsI） of electronic chips and film coating.

关键词： fluid thin film non-Darcy medium velocity slip unsteady s.r.tching sheet,Joule dissipation heat generation/abs.r.tion

salmonella typhi and gallbladder cancer:report from an endemic region

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2010年第5期9卷 524-530页

作者： Mallika Tewari raghvendra r mishra Hari s shukla Department of s.r.ical Oncology Institute of Medical SciencesBanaras Hindu University

BACKGrOUND:Evidence exists of a link between chronic infection by salmonella typhi(***) and the development of gallbladder cancer(GBC),but several studies from endemic regions contradict its.r.le in the etiopathogenesis of *** study used various tools to assess the prevalence of *** in patients with GBC and gallstone disease(GsD) in this.r.gion with a high incidence of ***:*** was detected in tissue and bile by PCr and culture and in s.r.m by the Widal test and indirect hemagglutination assay(IHA).PCr with two pairs of *** specific primers(flagellin gene H1d and sOP E gene) could detect 0.6 ng of *** ***-four patients with GBC(cases) were matched with 54 patients with GsD(controls).rEsULTs:Of the 54 cases,24(44.44%) were positive on the Widal test and 12(22.22%) on IHA,compared to 13(24.07%) and 5(9.26%) respectively in the ***(33.33%) cases showed a positive result on PCr(tissue) and 2 on PCr(bile) *** in the *** culture revealed no salmonella colonies in either cases or *** 3 cases were positive for salmonella on tissue culture compared to none in the *** sensitivity of PCr(tissue) relative to the Widal test,IHA,culture(bile and tissue) and PCr(bile) was 100% vs.66.67%,11.11%,and 11.11%,and the specificity was 83.33% vs.100%,100%,and 100%,***:*** is significantly associated with GBC compared to GsD(33% vs.0%).PCr appears to be the most specific diagnostic tool,the gold standard for *** in tissue samples.

关键词： salmonella typhi gallbladder cancer polymerase chain reaction Widal indirect hemagglutination assay culture

Nonsmooth semi-Infinite Minmax Programming Involving Generalized(Φ, ρ)-Invexity

在线全文

学校读者我要写书评

暂无评论

Journal of systems science & Complexity 2015年第4期28卷 857-875页

作者： UPADHYAY B B mishra s K Department of Basic sciences & Humanities National Institute of Technology

This paper introduces some new generalizations of the concept of （~, p）-invexity for non- differentiable locally Lipschitz functions using the tools of Clarke subdifferential. These functions are used to derive the necess.r. and sufficient optimality conditions for a class of nonsmooth semi-infinite minmax programming problems, where set of res.r.ctions are indexed in a compact set. Utilizing the sufficient optimality conditions, the authors formulate three types of dual models and establish weak and s.r.ng duality results. The results of the paper extend and unify naturally some earlier results from the literature.

关键词： Duality, generalized invexity locally Lipschitz functions, minmax programming, semi-infinite programming.