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Nonlinear forced vibration in a subcritical regime of a porous functionally graded pipe conveying fluid with a retaining clip

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAmI m.EFTEKHARI Department of mechanical Engineering Shahid Bahonar University of Kerman

This study examines the nonlinear behaviors of a clamped-clamped porous pipe made of a functionally graded material(FGm) that conveys fluids and is equipped with a retaining clip, focusing on primary resonance and subcritical dynamics. The nonlinear governing equations for the FGm pipe are derived by the extended Hamilton's principle, and subsequently discretized through the application of the Galerkin *** direct method of multi-scales is then used to solve the derived equations. A thorough analysis of various parameters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a comprehensive understanding of the system's nonlinear dynamics. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the comparisons with metallic pipes emphasize the role of FGm composition. The examination of the forced response curves reveals saddle-node bifurcations and their dependence on parameters such as the detuning parameter and the power-law index, offering valuable insights into the system's nonlinear resonant behavior. Furthermore, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system response and resonance characteristics. This comprehensive analysis enhances the understanding of nonlinear behaviors in FGm porous pipes with a retaining clip, providing key insights for practical engineering applications in system design and optimization.

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CT of hepatocellular carcinoma in non-alcoholic fatty liver disease: imaging characteristics and inter-rater agreement

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Hepatoma Research 2019年第10期5卷 42-52页

作者： Ishan Garg Scott m.thompson Shannon P.Sheedy Taofic mounajjed Ashish Khandelwal Eric C.Ehman Candice A.Bookwalter Sudhakar K.Venkatesh Department of Radiology Mayo Clinic College of MedicineRochesterMN 55905USA Department of Laboratory medicine and Pathology Mayo Clinic College of MedicineRochesterMN 55905USA

Aim:To determine the computed tomography(CT)features of non-alcoholic fatty liver disease(NAFLD)associated hepatocellular carcinoma(HCC).methods:In this institutional review board approved study,we reviewed 38 patients with NAFLD(68.4%male;mean age 63 years)with histology confirmed HCC and triphasic liver *** images were independently reviewed by four readers blinded to clinical and pathology *** reviewers assessed HCC for arterial phase hyper enhancement(APHE),portal venous phase washout(PVWO),delayed phase washout(DPWO),and enhancing *** of cirrhotic morphology and portal hypertension(PH)were also *** final CT features were determined by majority and a fifth reader reviewed cases lacking ***-rater agreement was determined by prevalence-adjusted ***:mean HCC size was 3.6±2.8 cm(range,1.1-16.0 cm).The HCCs showed APHE in 92.1%,PVWO in 55.3%,DPWO in 81.6%,and enhancing capsule in 44.7%.Cirrhotic morphology was present in 65.8%and PH in 63.2%.Inter-rater agreement was moderate to almost perfect for APHE(0.74-1.0),cirrhosis(0.79-0.89),and PH(0.79-0.95),weak to perfect for DPWO(0.47-0.95)and poor for PVWO(0-0.42). ;Conclusion:NAFLD associated HCC demonstrate less frequent portal venous washout on CT which may affect their imaging diagnosis.

关键词： Hepatocellular carcinoma computed tomography fatty liver inter-rater agreement non-alcoholic fatty liver disease

Neurogenesis dynamics in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： moawiah m.Naffaa Department of Psychology and Neuroscience Duke UniversityDurhamNCUSA Department of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons migrating to the granule cell layer and glomerular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit remodeling triggered by memory and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. moreover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory information processing. This adaptive process responds to changes in epithelial composition and contributes to the formation of olfactory memories by modulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions remains a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around mitral and tufted cells. This organizational pattern significantly impacts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and memory. Additionally, this organization is further shaped by axon terminals originating from cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these complex and highly interconnected processes have not been comprehensively studied as a whole. Therefore, this manuscript aims to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These mechanisms are thought to support olfactory learning and memory, potentially through increased

关键词： network adaptability neurogenesis neuronal communication olfactory bulb olfactory learning olfactory memory synaptic plasticity

An efficient method for unfolding kinetic pressure driven VISAR data

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High Power Laser Science and Engineering 2015年第3期3卷 50-58页

作者： m.Hess K.Peterson A.Harvey-thompson Sandia National Laboratories

Velocity Interferometer System for Any Reflector(VISAR) [Barker and Hollenbach, J. Appl. Phys. 43, 4669(1972)]is a well-known diagnostic that is employed on many shock physics and pulsed-power experiments. With the VISAR diagnostic, the velocity on the surface of any metal flyer can be found. For most experiments employing VISAR, either a kinetic pressure [Grady, mech. mater. 29, 181(1998)] or a magnetic pressure [Lemke et al., Intl J. Impact Eng. 38,480(2011)] drives the motion of the flyer. moreover, reliable prediction of the time-dependent pressure is often a critical component to understanding the physics of these experiments. Although VISAR can provide a precise measurement of a flyer's surface velocity, the real challenge of this diagnostic implementation is using this velocity to unfold the timedependent pressure. The purpose of this paper is to elucidate a new method for quickly and reliably unfolding VISAR data.

关键词： laser driven blast wave pulsed-power VISAR

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我们一模一样

英语画刊(初中版) 2020年第7期 17-18页

作者： Belinda m.thompson

有两个女孩,她们看起来一模一样——她们是双胞胎!参考译文:"我们是双胞胎。我们看起来一模一样。""我们的头发一模一样。""我们的脸一模一样。""我们的眼镜一模一样。""我们的裙子一模一样。""可是我们的名字不一样。""我的名字叫菲姆...

有两个女孩,她们看起来一模一样——她们是双胞胎!参考译文:"我们是双胞胎。我们看起来一模一样。""我们的头发一模一样。""我们的脸一模一样。""我们的眼镜一模一样。""我们的裙子一模一样。""可是我们的名字不一样。""我的名字叫菲姆,她的名字叫芙拉姆。"

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Experimental Analysis of Atypically Long Finned Oscillating Heat Pipe for Ventilation Waste Heat Recovery Application

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Journal of Thermal Science 2020年第3期29卷 667-675页

作者： mAHAJAN Govinda CHO Heejin SmITH Aaron thompson Scott m. Rheem manufacturing MontgomeryAL 36109USA Department of mechanical Engineering Mississippi State UniversityMsissippi StateMS 39762USA Department of mechanical Engineering Auburn UniversityAubumnAL 36849USA

Oscillating heat pipes(OHP)which are constructed from a serpentine-arranged capillary tube possess a desirable aerodynamic form factor and provide for relatively high heat transfer rates via cyclic evaporation and condensation of an encapsulated working fluid with no internal wicking structure *** last two decades,OHP has been extensively investigated for its potential application in thermal management of various *** study presents an experimental investigation on the heat transfer performance of an atypically long finned *** heat transfer performance of the proposed OHP was analyzed and compared with a bare tube OHP with similar overall *** show that a unit row of finned OHP filled with n-pentane with fill ratio of 70%can recover up to(400±40)W of heat from a typical waste exhaust air *** additional pressure drop due to fins was estimated to be(6.8±2)Pa resulting in an increase of 1–2 W of fan power *** average heat recovery rate via finned OHP was found to be almost 80%more than bare tube OHP filled with same working fluid with same fill ratio.

关键词： oscillating heat pipe waste heat recovery ventilation

mitochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflammaging-associated neurodegeneration

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Neural Regeneration Research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de Biología molecular Severo Ochoa(CBm) Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” comes from the Latin senescens, meaning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting

用感耦等离子体原子发射光谱作流体包裹体爆裂物的分析:探索性研究

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地球与环境 1982年第2期 49-52页

作者： m.thompson 何禄卿中南矿冶学院科研部中心实验宣

本文报道了一种将包裹体流体雾化以引进感耦等离子体原子发射光谱(ICP)的高效方法——爆裂法的应用。该方法减少了样品制备过程中由于研碎和浸取而造成的污染可能性,并能在少量(<0.5克)主矿物样品中快速而同时测定多达40个元素。我们认... 详细信息

本文报道了一种将包裹体流体雾化以引进感耦等离子体原子发射光谱(ICP)的高效方法——爆裂法的应用。该方法减少了样品制备过程中由于研碎和浸取而造成的污染可能性,并能在少量(<0.5克)主矿物样品中快速而同时测定多达40个元素。我们认为,该方法在地球化学勘查领域具有很大的潜力。

关键词：流体包裹体等离子体试料研碎浸取法矿物包体爆裂法矿物相

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.

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