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Various exact wave solutions for KdV equation with time-variable coefficients

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Journal of Ocean Engineering and science 2022年第5期7卷 409-418页

作者： Hajar F.Ismael muhammad Amin s.murad hasan Bulut Department of mathematics Faculty of ScienceUniversity of ZakhoZakhoIraq Department of mathematics College of ScienceUniversity of DuhokDuhokIraq Department of Computer and communications Engineering College of EngineeringNawroz UniversityDuhokIraq Department of mathematics Faculty of ScienceFirat UniversityElazigTurkey

In this study,we investigate the(2+1)-dimensional Korteweg-De Vries(KdV)equation with the extension of time-dependent coefficients.A symbolic computational method,the simplified Hirota’s method,and a long-wave method are utilized to create various exact solutions to the suggested *** symbolic computational method is applied to create the Lump solutions and periodic lump ***’s method and a long-wave method are implemented to explore single-,double-and triple-m-lump waves,and interaction physical phenomena such as an interaction of single-m-lump with one-,twosoliton solutions,as well as a collision of double-m-lump with single-soliton ***,the simplified Hirota’s method is employed to explore complex multi-soliton *** realize dynamics,the gained solutions are drawn via utilizing different arbitrary variable coefficients.

关键词： Hirota’s method Lump solutions Interaction phenomena Complex multi-soliton waves KdV equation

Insights from an academic endeavor into central nervous system drug discovery

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Neural Regeneration Research 2025年第6期20卷 1717-1718页

作者： Lieve van Veggel An m.Voets Tim Vanmierlo Rudy schreiber BIOmED Biomedical Research Institute Faculty of Medicine and Life SciencesHasselt UniversityHasseltBelgium Department of Psychiatry and Neuropsychology Division of Translational NeuroscienceEuropean Graduate School of NeuroscienceSchool for Mental Health and NeuroscienceMaastricht UniversityMaastrichtThe Netherlands section of Psychopharmacology Neuropsychology and PsychopharmacologyFaculty of Psychology and NeuroscienceMaastricht UniversityMaastrichtThe Netherlands University ms Center(UmsC) Hasselt-PeltBelgium

Historically,"big pharma"did most central nervous system drug discovery R&D ***,in modern times their"management reductionism"resulted in disappointing pipelines and pharma resided to(late)development,regulatory approval,and marketing(Thong,2015).This had significant consequences for financing and executing research,resulting in a larger role for funding by governments and patient-organizations and a shift of research to academia(mazzucato,2013).

关键词： academic approval consequences

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Neurocircuit regeneration by extracellular matrix reprogramming

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Neural Regeneration Research 2025年第8期20卷 2300-2301页

作者： shengzhang su Ian N.Levasseur Kimberly m.Alonge Department of medicinal Chemistry University of WashingtonSeattleWAUSA Department of Chemistry University of WashingtonSeattleWAUSA Department of medicine University of Washington Medicine Diabetes InstituteSeattleWAUSA

The brain's extracellular matrix(ECm),which is comprised of protein and glycosaminoglycan(GAG)scaffolds,constitutes 20%-40% of the human brain and is considered one of the largest influencers on brain cell functioning(soles et al.,2023).synthesized by neural and glial cells,the brain's ECm regulates a myriad of homeostatic cellular processes,including neuronal plasticity and firing(miyata et al.,2012),cation buffering(moraws ki et al.,2015),and glia-neuron interactions(Anderson et al.,2016).Considering the diversity of functions,dynamic remodeling of the brain's ECm indicates that this understudied medium is an active participant in both normal physiology and neurological diseases.

关键词： matrix programming

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A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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Journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng Wu Hao Gao Qingqing Wang Pengfei Lv sam s.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University school of mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 m ZnsO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies mild aqueous electrolyte Tailorable battery Wearable energy storage device

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

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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： hybrid nanofluid oscillating curved stretchable sheet gyrotactic microorganism Cattaneo-Christov heat and mass flux chemical reaction analytical solution O368

Hepatic involvement in children with acute bronchiolitis

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World Journal of Hepatology 2022年第10期14卷 1907-1919页

作者： hasan m Isa Asma Z hasan sara I Khalifa sana s Alhewaizem Abdulrahman D mahroofi Fatema N Alkhan mohammed Al-Beltagi Department of Pediatrics Salmaniya Medical ComplexManama 12Bahrain Department of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Department of Pediatrics Sulwan Psychiatric HospitalManama 973Bu QuwahBahrain Department of Pediatrics Dream Reem Medical CenterMuharraq 50573Bahrain Department of Pediatrics King Hamad University HospitalMuharraq 24343Bahrain Department of Pediatrics Faculty of MedicineTanta UniversityTanta 31527AlgharbiaEgypt Department of Pediatrics University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671Bahrain Department of Pediatrics University Medical CenterDr.Sulaiman Al-Habib Medical GroupBahrainManama 26671Bahrain

BACKGROUND Respiratory syncytial virus(RsV)is a prevalent cause of lower respiratory tract *** may be associated with hepatocellular involvement,as indicated by increased liver enzymes aspartate aminotransferase and alanine transaminase(ALT).AIm To evaluate the rate of increased liver enzyme levels in children with acute bronchiolitis and correlate them with clinical,laboratory,and radiological *** The study was a retrospective review of the medical records of children who presented with acute bronchiolitis when admitted to the Pediatric Department,salmaniya medical Complex,the Kingdom of Bahrain,between 2019 and *** collected the demographic data,the clinical presentation,the laboratory and radiological findings,and the clinical *** compared the patients with elevated liver enzymes to those with normal levels at the time of presentation and at *** We included 166(57.8%)of 287 patients with acute bronchiolitis who fulfilled the inclusion ***-three(56%)patients were *** median age at presentation was 3.4(interquartile range 1.1 to 12.4)***-four(28%)patients tested positive for RsV,which was confirmed in 15 of them(28%)by *** findings of 161 patients tested at presentation showed high ALT levels in 14(8.7%)patients and normal ALT in 147(91.3%).Coagulation profiles were measured in 46(27.7%)of 166 *** prothrombin time was present in 15(32.6%),a high international normalized ratio was present in 13(28.3%),and high activated partial thromboplastin time was present in three(6.5%).Thrombin time was elevated in nine(27.3%)of 33 ***(21.7%)of 23 patients with available radiological data had hepatomegaly;one of them had findings suggestive of fatty *** ALT had a significant association with lengthy hospital stays(Psitive urine culture(Pseventy(42.2%)patients had documented follow-up with liver function tests over a median follow-up period of

关键词： involvement elevated bronchiolitis

Compressible flow characteristics around a biconvex arc airfoil in a channel

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Propulsion and Power Research 2014年第1期3卷 29-40页

作者： md.Abdul Hamid A.B.m.Toufique hasan s.m.Alimuzzaman s.matsuo T.setoguchi Department of mechanical Engineering Bangladesh University of Engineering and Technology(BUET)Dhaka-1000Bangladesh Department of Advanced Technology Fusion Saga UniversitySaga 8408502Japan

shock wave-boundary layer interactions(sWBLI)are observed in several practical high-speed internal flows,such as compressor blades,turbine cascades,nozzles and so *** induced oscillations(sIO),aerodynamic instabilities so-called buffet flows,flutter,aeroacoustic noise and vibration are the detrimental consequences of this unsteady shockboundary layer *** the present study,a numerical computation has been performed to investigate the compressible flow characteristics around a 12%thick biconvex circular arc airfoil in a two dimensional *** averaged Navier-stokes equations with two equation k-ωshear stress transport(ssT)turbulence model have been applied for the computational *** flow field characteristics has been studied from pressure ratio(ratio of back pressure,pb to inlet total pressure,p01)of 0.75 to *** present computational results have been compared and validated with the available experimental *** results showed that the internal flow field characteristics such as shock wave structure,its behavior(steady or unsteady)and the corresponding boundary layer interaction are varied with pressure ***-excited shock oscillation was observed at certain flow ***,the mode of unsteady shock oscillation and its frequency are varied significantly with change of pressure ratio.

关键词： Compressible flow shock waves shock induced oscillation Frequency Reynolds-averaged Navier-stokes(RANs)

structural, Dielectric, and magnetic Properties of Ba-Doped multiferroic Bismuth Ferrite

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Acta metallurgica sinica(English Letters) 2015年第8期28卷 958-964页

作者： Rubayyat mahbub Takian Fakhrul.md Fakhrul Islam mehedi hasan Arman Hussain m.A.matin m.A.Hakim Department of Glass and Ceramic Engineering Bangladesh University of Engineering and Technology Department of materials and metallurgical Engineering Bangladesh University of Engineering and Technology

The main focus of the research was to correlate the microstructure with dielectric and magnetic properties of Bi1-xBaxFeO3 samples. Bi1-xBaxFeO3 samples（x = 0.1, 0.2 and 0.3） were synthesized by the conventional solid-state reaction method using nano-powders of Bi2O3, Fe2O3, and BaCO3. Thereafter, field emission scanning electron microscope and X-ray diffraction（XRD） techniques were used to examine the structure and phase of the samples. Phase analysis by XRD indicated that the single-phase perovskite structure was formed with possible increment in lattice parameter with increasing Ba doping. Complex permeability（u＇iand u＇＇i） measured using impedance analyzer confirmed the increase in magnetic property with increasing Ba doping. Finally, dielectric constant（k） was analyzed as a function of temperature at different frequencies. Dielectric constant as high as 2900 was attained in this research for Bi0.8Ba0.2FeO3 sample due to reduction in leakage current at this composition.

关键词： multiferroic Bismuth ferrite Dielectric Complex permeability

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Regression analysis of squeezing-induced hybrid nanofluid flow in Darcy-Forchheimer porous medium

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 193-208页

作者： K.mUHAmmAD m.sARFRAZ Department of Humanities and sciences School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of mathematics Quaid-i-Azam University

This article presents a mathematical model addressing a scenario involving a hybrid nanofluid flow between two infinite parallel plates. One plate remains stationary, while the other moves downward at a squeezing velocity. The space between these plates contains a Darcy-Forchheimer porous medium. A mixture of water-based fluid with gold(Au) and silicon dioxide(si O2) nanoparticles is formulated. In contrast to the conventional Fourier's heat flux equation, this study employs the Cattaneo-Christov heat flux equation. A uniform magnetic field is applied perpendicular to the flow direction, invoking magnetohydrodynamic(mHD) effects. Further, the model accounts for Joule heating, which is the heat generated when an electric current passes through the fluid. The problem is solved via NDsolve in mATHEmATICA. Numerical and statistical analyses are conducted to provide insights into the behavior of the nanomaterials between the parallel plates with respect to the flow, energy transport, and skin *** findings of this study have potential applications in enhancing cooling systems and optimizing thermal management strategies. It is observed that the squeezing motion generates additional pressure gradients within the fluid, which enhances the flow rate but reduces the frictional drag. Consequently, the fluid is pushed more vigorously between the plates, increasing the flow velocity. As the fluid experiences higher flow rates due to the increased squeezing effect, it spends less time in the region between the plates. The thermal relaxation, however, abruptly changes the temperature, leading to a decrease in the temperature fluctuations.

关键词： convective boundary condition Darcy-Forchheimer medium hybrid nanofluid Joule heating magnetohydrodynamic (mHD) numerical solution squeezing flow regression analysis O361 O175.2