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Analysis of Bio-inspired Fishbone Based Corrugated rib for Adaptive Camber Morphing

journal of Bionic Engineering 2023年第3期20卷 1083-1102页

作者： r.jini r.j j.Bruce ralphin rose A.Vasudevan Department of Mechanical Engineering Anna University Regional CampusTirunelveli627007India Saveetha School of Engineering SIMATSChennai600124India

Bioinspired active camber morphing is an innovative solution for the aerodynamic performance enhancement of flight vehicles such as Micro Aerial Vehicles(MAVs)and Unmanned Aerial Vehicles(UAVs).In the present article,a bio-inspired Fish Bone Active Camber(FishBAC)corrugated rib design concept with and without a spine for an Unmanned Aerial Vehicle(UAV)is *** wing model is composed of multiple corrugated ribs and a splitted spar for connecting each *** rib geometry is subjected to static structural analysis using ANSYS Finite Element Analysis(FEA)module under the unit load *** deformation modes are first extracted from the solution of the wind tunnel test and the elastically deformed NACA 4412 profile will be used to perform Fluid-Structure Interaction(FSI)studies as a partly coupled *** corrugated rib with spine design is a stable structure as inspired from nature species that can withstand elastic and inertial *** fluid dynamics(CFD)simulation is performed to compute the coefficient of lift(Cl),coefficient of drag(Cd)at different Angle of Attack(AoA)for a modified NACA 4412 airfoil and the pressure loads acting on the deformed shape is *** Cl obtained for the modified airfoil at lower AoA is about 60–80%higher and the maximum Cl(Clmax)is 62%higher than the baseline *** Cd of modified airfoil is reduced about 20%at the AoAα=3°as compared with the baseline *** proposed corrugated rib structure has been successfully 3D printed with Polylactic Acid plus(PLA+)material and the wind tunnel testing is done to validate the Cl,Cd values obtained through CFD simulations and the results are presented.

关键词： Bioinspired design Active morphing Fish bone Wind tunnel CFD

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Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing SMN1 delivery to correct all neurological and systemic perturbations

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Neural regeneration research 2025年第7期20卷 2011-2012页

作者： Sharon j.Brown rafael j.Yáñez-Muñoz Heidi r.Fuller School of Pharmacy and Bioengineering Keele UniversityKeeleUK Wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular atrophy(SMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of SMA was understood in 1995 when loss or impairment of the survival motor neuron 1(SMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,SMN2,which can produce low levels(approximately 10%)of the full-length functional SMN protein,has led to the generation of SMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,SMN2 copy number is used as a proxy for the prediction of disease severity,with higher SMN2 copy number typically being associated with reduced severity of SMA,although this relationship is not absolute:some individuals with low SMN2 copy number have less severe SMA phenotypes and vice ***,the etiology of SMA is further complicated by other factors,such as non-typical nucleotide variants and SMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

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Physiological Mechanism of Salicylic Acid for Alleviation of Salt Stress in rice

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rice science 2017年第2期24卷 97-108页

作者： D.jini B.jOSEPH Department of Biotechnology Manonmaniam Sundaranar UniversityTirunelveli 627012Tamil NaduIndia Dean Centre for Research and ConsultancyHindustan University/Institute of Technology and SciencePadurKelambakkamChennai 603103Tamil NaduIndia

Soil salinity is one of the most important problems of crop production in estuarine and coastal zones. Improvement in salt tolerance of major food crops is an important way for the economic utilization of coastal zones. This study proved that the application of salicylic acid(SA) improved the growth and yield under salt stress conditions and investigated its physiological mechanisms for salt tolerance. The investigation on the effect of SA for salt tolerance during germination showed that the decreased rates of germination and growth(in terms of shoot and root lengths) by the salt stress were significantly increased by the SA application(SA + NaCl). The treatment of SA to the high and low saline soils enhanced the growth, yield and nutrient values of rice. The effects of SA on Na^+, K^+ and Cl~– ionic accumulation were traced under salt stress condition by inductively coupled plasma optical emission spectrometry and ion chromatography. It was revealed that the increased accumulation of Na^+ and Clˉ ions by the salt stress were reduced by SA application. An increased concentration of endogenous SA level was detected from the SA-treated rice varieties(ASD16 and Br26) by liquid chromatography electrospray Ionization-tandem mass spectrometry. The activities of antioxidant enzymes such as superoxide dismutase, catalase and peroxidase were increased by salt stress whereas decreased by the SA application. The study proved that the application of SA could alleviate the adverse effects of salt stress by the regulation of physiological mechanism in rice plants. In spite of salt stress, it can be applied to the coastal and estuarine regions to increase the rice production.

关键词： salicylic acid salt tolerance Oryza sativa NaCl germination physiology

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德国GPS在线位移监控和预警系统工作原理与工程应用

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地质科技情报 2005年第B07期24卷 126-128页

作者：项伟 r.jger 中国地质大学工程学院武汉430074 德国卡尔斯鲁厄应用科技大学卡尔斯鲁厄76133

德国GPS在线位移监控和预警系统,除了可以进行GPS测量和数据处理外,还可给出观测点的实时三维位移数据、位移速度和位移加速度,绘出分析曲线,其划量精度达毫米级,并可根据预先设定的破坏概率自动报警。该系统可预测和预警自然灾害如滑... 详细信息

德国GPS在线位移监控和预警系统,除了可以进行GPS测量和数据处理外,还可给出观测点的实时三维位移数据、位移速度和位移加速度,绘出分析曲线,其划量精度达毫米级,并可根据预先设定的破坏概率自动报警。该系统可预测和预警自然灾害如滑坡、泥石流、地震等;在矿山开采作业中,可对矿坑、尾矿坝及采空区的地表塌陷进行监控;可用于岩土工程和土木工程建设中的高边坡、建筑物、基坑、挡土墙以及塔楼和桥梁高频率运动的监测;可广泛应用于水利工程建设,如大坝、大堤位移和沉陷的监控等。在道路建设中,可应用于隧道开挖、路堤沉陷和桥梁位移的观测。

关键词：德国GPS 在线监测位移预警系统大坝

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Moore-Gibson-Thompson theory for thermoelastic dielectrics

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Applied Mathematics and Mechanics(English Edition) 2021年第2期42卷 309-316页

作者： j.r.FErNANDEZ r.QUINTANILLA Department of Applied Mathematics I University of VigoCampus As Lagoas MarcosendeVigo 36310Spain Department of Mathematics Polytechnic University of CataloniaTerrassa 08222Spain

We consider the system of equations determining the linear thermoelastic deformations of dielectrics within the recently called Moore-Gibson-Thompson(MGT)***,we obtain the system of equations for such a ***,we consider the case of a rigid solid and show the existence and the exponential decay of ***,we consider the thermoelastic case and obtain the existence and the stability of the *** decay of solutions in the one-dimensional case is also recalled.

关键词： Moore-Gibson-Thompson(MGT)thermoelastic dielectrics existence semigroup exponential decay

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A higher-order porous thermoelastic problem with microtemperatures

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Applied Mathematics and Mechanics(English Edition) 2023年第11期44卷 1911-1926页

作者： j.r.FErNáNDEZ r.QUINTANILLA Department of Applied Mathematics I University of VigoETSI de Telecomunicacion Campus As Lagoas Marcosende s/nVigo 36310Spain Department of Mathematics Polytechnical University of CatalunyaTerrassa 08222BarcelonaSpain

In this paper,we study a porous thermoelastic problem with microtemperatures assuming parabolic higher order in time derivatives for the thermal *** model is derived and written as a coupled linear ***,a uniqueness result is proved by using the logarithmic convexity method in the case that we do not assume that the mechanical energy is positive ***,the existence of the solution is obtained by introducing an energy function and applying the theory of linear semigroups.

关键词： higher order thermoelasticity microtemperature logarithmic convexity method existence and uniqueness

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Two distinct Paleozoic metamorphic events in the Tarim-North China Collage

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National Science review 2023年第2期10卷 7-8页

作者： jérémie Soldner State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences CAS Center for Excellence in Deep Earth Science

The Central Asian Or ogenic Belt(CAOB) [1],which includes the Altaids in Central and Northern Asia [2],is the largest accretionary orogen formed during the subduction of the Paleo-Asian Ocean and the Panthalassa Ocean in the period of the Late Proterozoic to Late Paleozoic [3].Closure of the Paleo-Asian Ocean is attributed to the northward drift of the North China and Tarim cratons leading to the massive shortening and oroclinal buckling of the CAOB accretionary system in the Permian [4].

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Alpha-particle decays from excited states in ^(24)Mg

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Science China(Physics,Mechanics & Astronomy) 2011年第S1期54卷 130-135页

作者： LIOTTA r.j royal Institute of Technology (KTH) AlbaNova University Center Stockholm S-10691 Sweden

Using a cluster model based on the Woods-Saxon potential, alpha-particle decays from excited states in 24Mg have been system atically investigated. Calculations can in general reproduce experimental data, noticing the fact that the preformation factor P of alpha particle in alpha-decaying nuclei is of order from 100 to 10?2. This can be the evidence for the α+20Ne structure in 24Mg. Meanwhile, the results also show the existence of other configurations, such as 16O+2α. Since the calculated decay widths are very sensitive to the angular momentum carried by the outgoing cluster (α particle), our results could serve as a guide to experimental spin assignments.

关键词： alpha decay cluster structure cluster model 24Mg

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Anisotropic plastic deformation behavior of as-extruded ZK60 magnesium alloy at room temperature

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Science China(Technological Sciences) 2009年第1期52卷 161-165页

作者： HANS j r Department of Materials Science and Engineering Norwegian University of Science and Technology

The anisotropic plastic deformation behavior of as-extruded ZK60 magnesium alloy at room tempera-ture (rT) was investigated by compressive and tensile testing in different directions, i.e. the loading axis oriented at 0°, 45° and 90° to the extrusion direction. The relationship between texture and plastic deformation behavior were examined. The results show that the extruded ZK60 alloy exhibits a strong ring fiber texture. The mechanical properties are strongly orientation dependent. In tension testing, the 0° specimen exhibited higher yield strength and lower elongation. In compression testing, however, ZK60 alloy exhibited almost the same yield strength in three directions. The anisotropic plastic defor-mation behavior is due to strong fiber texture and the lower symmetry of the hexagonal close packed (hcp) structure of ZK60 alloy. The correlation between texture and mechanical behaviour offers the possibility to improve the mechanical properties of magnesium alloy by optimization of the material production process.

关键词： anisotropic plastic deformation behavior ZK60 Mg alloy texture mechanical property

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Multiphysics of multifunctional nanofluids based on different oxides nanoparticles and glycerol fluid

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Particuology 2023年第5期76卷 46-62页

作者： r.j.Sengwa Mukul Saraswat Dielectric research Laboratory Department of PhysicsJai Narain Vyas UniversityJodhpur342005India

Nanofluid(NF)materials consisting of glycerol(Gly)and different inorganic nano oxides(TiO_(2),ZnO,Al_(2)O_(3),and SiO_(2) for the oxides concentration of 0.01 wt%to the weight of Gly base fluid)were prepared by a two-step method through ultrasonic cavitation *** nanofluids were investigated by employing an X-ray diffractometer(XrD),ultraviolet-visible(UV-Vis)spectrophotometer,20 Hz to 1 MHz frequency range dielectric relaxation spectroscopy(DrS),ultrasonic interferometer,and rotational *** multiphysics of these nanofluids includes structural and optical properties,dielectric permittivity,electrical conductivity,conductivity relaxation,ultrasound velocity,adiabatic compress-ibility,acoustic impedance,viscosity,density,thermal conductivity,and viscoacoustic relaxation were *** XrD patterns identified monodispersed and stable suspensions of these different characteristic nanoparticles in the hydrogen-bonded 3D supramolecular structure of ultra-high viscous glycerol fluid which were supported by their UV-Vis absorbance *** energy band gap values of the TiO_(2)and ZnO containing nanofluids were found primarily ruled by the characteristic optical prop-erties of these oxides *** complex dielectric and various electrical functions studied at 25℃revealed that the suspension of different oxide nanoparticles in the glycerol fluid increased the static permittivity whereas reduced the direct current electrical conductivity which showed strong conductivity relaxation process *** rheological measurements of the formulated nanofluids were performed over a shear rate range of 0.4-40 s^(-1)at temperatures of 25-55℃.The linear rela-tionship between shear rate and shear stress and also the shear rate-independent viscosity revealed the Newtonian behaviour of these *** shear viscosity non-linearly decreased with the increase of temperature and exhibited the Arrhenius behaviour for all different oxides contain

关键词： Glycerol Nano oxides Nanofluids Optical properties Dielectric properties Thermophysical parameters

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