检索结果-南通市图书馆

transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词：

Free vibration and transient response of double curved beams connected by intermediate straight beams

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

关键词：

Delay-dependent Robust Stabilization and H_∞ Control for Uncertain Stochastic t-S Fuzzy Systems with Discrete Interval and Distributed time-varying Delays

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2013年第1期10卷 18-31页

作者： P.Balasubramaniam t.Senthilkumar Department of Mathematics Gandhigram Rural University

In this paper, delay-dependent robust stabilization and H∞ control for uncertain stochastic takagi-Sugeno （t-S） fuzzy systems with discrete interval and distributed time-varying delays are discussed. the purpose of the robust stochastic stabilization problem is to design a memoryless state feedback controller such that the closed-loop system is mean-square asymptotically stable for all admissible uncertainties. In the robust H∞ control problem, in addition to the mean-square asymptotic stability requirement, a prescribed H∞ performance is required to be achieved. Sufficient conditions for the solvability of these problems are proposed in terms of a set of linear matrix inequalities （LMIs） and solving these LMIs, a desired controller can be obtained. Finally, two numerical examples are given to illustrate the effectiveness and less conservativeness of our results over the existing ones.

关键词： Robust stability robust H∞ control stochastic fuzzy systems distributed delay linear matrix inequality (LMI)

Distribution and morpho-anatomical characterization of ’Beket’(Coriaria japonica subsp. intermedia(Matsum) t.C. Huanh) in Cordillera Central Range, Northern Philippines

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2020年第9期17卷 2136-2147页

作者： Maricel A.GURON Jones t.NAPALDEt Biology Department Benguet State UniversityBenguet 2601Philippines University of Philippines Los Banos Laguna 4031Philippines

Coriaria,the only genus under family Coriariacea,receives a lot interest among botanist due to its controversial taxonomic treatment and unique phytochemistry that could be commercially *** populations of Coriaria japonica *** in Cordillera Central Range(CCR),Philippines had never been studied in *** the need for more information on this controversial genus,the study deemed it necessary to present the distribution and morpho-anatomical description of *** *** in CCR.A total of 123 populations were documented,found at an elevation range of 1334 to 2494 m asl and stretched between16°31’37.7"to 17°5’47.8"N and 120°39’40.3"to120°55’48"*** these populations showed a narrow linear pattern of distribution concentrated at the southern portion of *** plant is a shrub with simple leaves,collateral buds,raceme inflorescence,bisexual flowers with persistent perianth forming an accessory fruit after *** terms of anatomy,much are of the usual dicot characters such as dorsiventral leaf with stomata concentrated in the lower epidermis,eustele with pith in the stem andpresence of secondary growth both on old stem and old *** findings of the study include the123 populations,the larger leaf measurements,longer petals and larger fruits than the original description given by ***,the paracytic type of stomata and presence of pith in the primary roots of *** *** are interesting since these are common monocot characters while the plant is *** findings are additional information that could help clear the controversies on the genus *** importantly,our results could provide essential information for understanding the plant and for developing conservation strategies not just for this plant but also for the other related plants in the CCR biogeographical zone.

关键词： Coriaria japonica subsp.intermedia Cordillera Central Range Geographical distribution Paracytic type Pith in dicot root

Model with strong γ_4 t-violation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2008年第12期32卷 939-944页

作者： R. Friedberg t. D. Lee Physics Department Columbia University New York NY 10027 U.S.A. China Center of Advanced Science and technology (CCASt/World Lab.) P.O. Box 8730

eAbstract We extend the t violating model of the paper on ＂Hidden symmetry of the CKM and neutrinomapping matrices＂ by assuming its t-violating phases X↑ and X↓ to be large and the same, with X = X↑ = X↓. In this case, the model has 9 real parameters： at, α↑,β↑,ξ↑,η↑t for the t-quark sector, α↓,β↓,ξ↓,η↓, for the sector and a common X- We examine whether these nine parameters are compatible with ten observables： the six quark masses and the four real parameters that characterize the CKM matrix （i.e., the Jarlskog invariant and three Eulerian angles）. We find that this is possible only if the t violating phase X is large, between -120^o to -135^o. In this strong t violating model, the smallness of theJarlskog invariant 3 × 10^-5 ismainly accounted for by the large heavy quark masses, with mc/mt〈ms/mb≈0.02, as well as the near completeoverlap of t and b quark, with （c｜b）=-0.04.

关键词： Jarlskog invariant CKM matrix strong γ4 t-violation

Calculation of electric field–temperature (E, t) phase diagram of a ferroelectric liquid crystal near the SmA–SmC_α~* transition

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第3期27卷 444-450页

作者： F trabelsi H Dhaouadi O Riahi t Othman Universite de tunis El-Manar Faculte des Sciences de TunisLaboratoire de physique de la matiere molle et de modelisation electromagnetique(LP3ME)Campus Universitaire Farhat Hached 2092 Tunis Tunisie

In this work we perform a theoretical calculation in order to reconstitute the （E-t） phase diagram of a chiral smectic liquid crystal in the vicinity of the SmA-SmCα＊ transition. this reconstruction is carried out on the basis of a thermo-dynamic calculation of the slope of the curve joining the SmC＊ domain and the unwound SmC＊. An empiric correction of the mean field term of Landau De-Gennes development is necessary to accomplish this reconstruction. thereafter, an experimental validation is performed to verify our calculations.

关键词： field-temperature phase diagram liquid orystal

FR167653,a p38 mitogen-activated protein kinase inhibitor,aggravates experimental colitis in mice

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第38期14卷 5851-5856页

作者： takashi Nishimura Akira Andoh Atsushi Nishida Makoto Shioya Yuhsuke Koizumi tomoyuki tsujikawa Yoshihide Fujiyama Department of Medicine Shiga University of Medical Science Seta TsukinowaOtsu 520-2192 Japan

AIM: to investigate the effects of FR167653 on the development of dextran sulfate sodium (DSS)-induced colitis in mice. MEtHODS: BALB/c mice were fed rodent chow containing 3.5% (wt/wt) DSS. the recipient mice underwent intra-peritoneal injection of vehicles or FR167653 (30 mg/kg per day). the mice were sacrificed on day 14, and the degree of colitis was assessed. Immunohistochemical analyses for CD4+ t cell and F4/80+ macrophage infiltration were also performed. Mucosal cytokine expression was analyzed by Rt-PCR. RESULtS: the body weight loss was more apparent in the FR167653-treated DSS mice than in the vehicle- treated DSS mice. the colon length was shorter in the FR167653-treated DSS mice than in the vehicle-treated DSS mice. Disease activity index and histological colitis score were significantly higher in FR167653- than in vehicle-treated DSS animals. Microscopically, mucosal edema, cellular infiltration (CD4 t cells and F4/80 macrophages), and the disruption of the epithelium were much more severe in FR167653-treated mice than in controls. Mucosal mRNA expression for interleukin-1β (IL-1β) and tumor necrosis factor-α (tNF-α) were found to be markedly reduced in FR167653-treated DSS mice. CONCLUSION: treatment with FR167653 aggravated DSS colitis in mice. this effect was accompanied by a reduction of mucosal IL-1β and tNF-α expression, suggesting a role of p38 mitogen-activated protein kinase (MAPK)-mediated proinflammatory cytokine induction in host defense mechanisms.

关键词： p38 Inflammatory bowel disease Cytokine Experimental colitis tumor necrosis factor-α

Design and Implementation of t-Shaped Planar Antenna for MIMO Applications

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

Computers, Materials & Continua 2021年第11期69卷 2549-2562页

作者： t.Prabhu S.Chenthur Pandian Department of ECE SNS College of TechnologyCoimbatore641035Tamil NaduIndia Department of EEE SNS College of TechnologyCoimbatore641035Tamil NaduIndia

this paper proposes,demonstrates,and describes a basic t-shaped Multi-Input and Multi-Output(MIMO)antenna with a resonant frequency of 3.1 to 10.6 *** with the U-shaped antenna,the mutual coupling is minimized by using a t-shaped patch *** t-shaped patch antenna shapes filter properties are tested to achieve separation over the 3.1 to 10.6 GHz frequency *** parametric analysis,including width,duration,and spacing,is designed in the MIMO applications for good *** the FR4 substratum,the configuration of MIMO is *** appropriate dielectric material ε_(r)=4.4 is introduced using this contribution and application array feature of the MIMO *** this paper,FR4 is used due to its high dielectric strength and low *** 3.1 to 10.6 GHz and 3SRR,t-shaped patch antennas are used in the field to increase *** suggested tshaped MIMO antenna is calculated according to the HFSS 13.0 program simulation *** antenna suggested is,therefore,a successful WLAN candidate.

关键词： Multi-input and multi-output FR4 substratum t-shaped patch antennas ISM band HFSS 13.0 WLAN

Butyrate stimulates IL-32α expression in human intestinal epithelial cell lines

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

World Journal of Gastroenterology 2010年第19期16卷 2355-2361页

作者： Ayako Kobori Shigeki Bamba Hirotsugu Imaeda Hiromitsu Ban tomoyuki tsujikawa Yasuharu Saito Yoshihide Fujiyama Akira Andoh Division of Gastroenterology Department of Internal Medicine Shiga University of Medical Science Seta Tukinowa Otsu 520-2192 Japan Division of Mucosal Immunology Graduate School of Medicine Shiga University of Medical Science Seta Tukinowa Otsu 520-2192 Japan

AIM: to investigate the effects of butyrate on interleukin (IL)-32α expression in epithelial cell lines. MEtHODS: the human intestinal epithelial cell lines Ht-29, SW480, and t84 were used. Intracellular IL- 32α was determined by Western blotting analyses. IL- 32α mRNA expression was analyzed by real-time poly-merase chain reaction. RESULtS: Acetate and propionate had no effects on IL-32α mRNA expression. Butyrate significantly enhanced IL-32α expression in all cell lines. Butyrate also up-regulated IL-1β-induced IL-32α mRNA expression. Butyrate did not modulate the activation of phosphatidylinositol 3-kinase (PI3K), a mediator of IL- 32α expression. Like butyrate, trichostatin A, a histone deacetylase inhibitor, also enhanced IL-1β-induced IL- 32α mRNA ***: Butyrate stimulated IL-32α expression in epithelial cell lines. An epigenetic mechanism, such as histone hyperacetylation, might be involved in the action of butyrate on IL-32α expression.

关键词： Cytokine Histone acetylation Inflammatory bowel disease