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Finite Element Analysis of Dynamic Damper for CV Joint

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Energy and Power Engineering 2012年第4期4卷 241-247页

作者： Rahul N. Yerrawar vinod b. tungikar Shravan H. Gawande Dept. of Mechanical Engineering M.E.S. College of Engineering Pune India Dept. of Production Engineering S.G.G.S. Institute of Engineering and Technology Nanded India

Constant Velocity [CV] Joints are one of the most important components of front wheel drive axles. It is sub.ected to various stresses such as b.nding stress, shear stress and b.aring stress. Apart from these stresses, it is also sub.ected to vib.ations, due to out of b.lance tire or wheel and an out of round tire or wheel, or a b.nt rim. The main ob.ective of this work is to reduce the stiffness of the damper, so that the damper can withstand within the required constraints [i.e. the forced frequency range of 80 Hz to 150 Hz]. The free vib.ational and forced vib.ational effects are investigated to predict the resonance phenomenon of the damper. Finite Element Analysis in ANSYS-11 software was performed to predict the dynamic b.havior of the system under the required vib.ational frequencies ranging from 80 Hz to 150 Hz at given loading conditions.

关键词： Constant Velocity (CV) Finite Element Analysis (FEA)

Paleozoic tectonic evolution of the proto-Korean Peninsula along the East Asian continental margin from detrital zircon U-Pb.geochronology and Hf isotope geochemistry

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Geoscience Frontiers 2024年第1期15卷 97-117页

作者： Yirang Jang Sung Won Kim vinod O.Samuel Sanghoon Kwon Seung-Ik Park M.Santosh Keewook Yi Department of Earth and Environmental Sciences Chonnam National UniversityGwangju 61186Republic of Korea Geology Division Korea Institute of Geoscience and Mineral ResourcesDaejeon 34132Republic of Korea Department of Earth System Sciences Yonsei UniversitySeoul 03722Republic of Korea Department of Geology Kyungpook National UniversityDaegu 41566Republic of Korea School of Earth Sciences and Resources China University of Geosciences BeijingBeijing 100083China Department of Earth Science University of AdelaideAdelaide SA 5005Australia Yonsei Frontiers Lab Yonsei UniversitySeoul 03722Republic of Korea Division of Earth and Environmental Sciences Korea Basic Science InstituteChungbuk 28119Republic of Korea

Detrital zircon geochronology and Hf isotope analysis can b. used for inferring provenance characteristics,and to evaluate the tectonic evolution of sedimentary b.sins and their link with regional *** Paleozoic sequences of the Okcheon b.lt consist of the Lower Paleozoic Joseon and the Upper Paleozoic Pyeongan supergroups with Middle Paleozoic hiatus locally on top of the Neoproterozoic b.modal volcanic rocks,reflecting an intracontinental rift setting b.tween the two b.sements(*** and Yeongnam massifs)at southern part of the Korean *** detrital zircon U-Pb.ages and Lu-Hf isotope results show that all these Paleozoic strata commonly have Paleoproterozoic and Paleozoic zircon ages with rare Meso-to Neoproterozoic *** individual zircon populations display following features,allowing estimation of their sedimentary provenances:(i)The Paleoproterozoic zircons(ca.1.85 Ga and 2.50 Ga)with similar ranges ofεHf(t)values are most common in the b.sement rocks of the Korean Peninsula,and were sourced from b.th the Gyeonggi and Yeongnam massifs.(ii)The Meso-to Neoproterozoic zircons,preserved only in the Middle to Late Camb.ian clastic sedimentary rocks within the carb.nate sequences prob.b.y reflect proximal provenance.(iii)The youngest Paleozoic zircons of each formation,almost coincident with their deposition ages,suggest presence of syndepositional magmatism,indicating proximal magmatic sources during their deposition.(iv)The Camb.ian-Ordovician zircons,from the Lower Paleozoic sequences,b.t rare in the successive Upper Paleozoic sequences,suggest a provenance change after the hiatus b.tween the two sedimentary successions.(v)The Permian zircons showing differentεHf(t)values indicate that detrital sources were varied at that *** integrated results in our study suggest provenance variab.lity linked to diverse tectonic environments,reflecting prolonged sub.uction-related crustal evolution of the proto-Korean Peninsula during the Paleozo

关键词： Detrital zircon U-Pb.and Hf isotopes Paleozoic metasedimentary rocks Okcheon b.lt Taeb.eksan zone Korean Peninsula

Artificial Potential Field Incorporated Deep-Q-Network Algorithm for Mob.le Rob.t Path Prediction

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Intelligent Automation & Soft Computing 2023年第1期35卷 1135-1150页

作者： A.Sivaranjani b.vinod Department of Rob.tics and Automation Engineering PSG College of TechnologyCoimbatore641004India Department of Electrical and Electronics Engineering PSG College of TechnologyCoimbatore641004India

Autonomous navigation of mob.le rob.ts is a challenging task that requires them to travel from their initial position to their destination without collision in an *** Learning methods enab.e a state action function in mob.le rob.ts suited to their *** trial-and-error interaction with its surroundings,it helps a rob.t tofind an ideal b.havior on its *** Deep Q Network(DQN)algorithm is used in Turtleb.t 3(Tb.)to achieve the goal b. successfully avoiding the *** it requires a large numb.r of training *** research mainly focuses on a mob.lity rob.t’s b.st path prediction utilizing DQN and the Artificial Potential Field(APF)***,a Tb. Waffle Pi DQN is b.ilt and trained to reach the *** the APF shortest path algorithm is incorporated into the DQN *** proposed planning approach is compared with the standard DQN method in a virtual environment b.sed on the Rob.t Operation System(ROS).The results from the simulation show that the comb.nation is effective for DQN and APF gives a b.tter optimal path and takes less time when compared to the conventional DQN *** performance improvement rate of the proposed DQN+APF in comparison with DQN in terms of the numb.r of successful targets is attained b. 88%.The performance of the proposed DQN+APF in comparison with DQN in terms of average time is achieved b. 0.331 *** performance of the proposed DQN+APF in comparison with DQN average rewards in which the positive goal is attained b. 85%and the negative goal is attained b.-90%.

关键词： Artificial potentialfield deep reinforcement learning mob.le rob.t turtle b.t deep Q network path prediction

A rare synchrony of adenocarcinoma of the ampulla with an ileal gastrointestinal stromal tumor: A case report

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World Journal of Gastrointestinal Oncology 2022年第11期14卷 2253-2265页

作者： Venkata vinod Kumar Matli Gazi b.Zib.ri Gregory Wellman Poornima Ramadas Sudha Pandit James Morris Department of Internal Medicine Christus Highland Medical CenterShreveportLA 71106United States Division of Hepatob.liary Surgery Willis-Knighton Health SystemShreveportLA 711103United States Department of Gastrointestinal and Liver Pathology Christus Highland Medical CenterShreveportLA 71105United States Division of Hematology and Oncology Louisiana State University Health Sciences CenterShreveportLA 71103United States Division of Gastroenterology and Hepatology Louisiana State University Health Sciences CenterShreveportLA 71103United States

b.CKGROUND This is a unique case of a patient who was found to have two extremely rare primary malignancies synchronously,i.e.,an ampullary adenocarcinoma arising from a high-grade dysplastic tub.lovillous adenoma of the ampulla of Vater(TVAoA)with a high-grade ileal gastrointestinal stromal tumor(GIST).b.sed on a literature review and to the b.st of our knowledge,this is the first report of this *** ampullary tumors are extremely rare,with an incidence of four cases per million population,which is approximately 0.0004%.Distal duodenal polyps are uncommon and have a preponderance of occurring around the ampulla of *** adenoma of the ampulla(AoA)may occur sporadically or with a familial inheritance pattern,as in hereditary genetic polyposis syndrome such as familial adenomatous polyposis syndrome(FAPS).We report a case of a 77-year-old male who was admitted for painless ob.tructive jaundice with a 40-pound weight loss over a two-month period and who was sub.equently diagnosed with two extremely rare primary malignancies,i.e.,an adenocarcinoma of the ampulla arising from a high-grade TVAoA and a high-grade ileal GIST found *** SUMMARY A 77-year-old male was admitted for generalized weakness with an associated weight loss of 40 pounds in the previous two months and was noted to have painless ob.tructive *** physical examination was b.nign except for b.lateral scleral and palmar *** results were significant for an ob.tructive pattern on liver *** lipase and carb.hydrate antigen-19-9 levels were *** tomography(CT)of the ab.omen and pelvis and magnetic resonance cholangiopancreatography were consistent with a polypoid mass at the level of the common b.le duct(Cb.)and the ampulla of Vater with Cb. *** same lesions were visualized with endoscopic retrograde *** of endoscopic forceps b.opsy showed *** of the surgical specimen of the

关键词： Tub.lovillous adenoma of the ampulla of Vater Ampullary adenocarcinoma Gastrointestinal stromal tumor Ampullary polyp Small b.wel mesenchymal tumor Case report

Spermine induced reversib.e collapse of deoxyrib.nucleic acid-b.idged nanoparticle-b.sed assemb.ies

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Nano Research 2018年第1期11卷 383-396页

作者： Kristian L. Goeken Richard b. M. Schasfoort vinod Sub.amaniam Ron Gill MIRA Institute for b.omedical Technology and Technical Medicine University of Twente Dfienerlolaan 5 7522 NB Enschede the Netherlands Vrije UniversiteitAmsterdam De Boelelaan 1105 1081 HVAmsterdam the Netherlands Saxion University of Applied Sciences M. H. Tromplaan 28 7513 A8 Enschede the Netherlands

DNA-linked 2D and 3D nano-assemb.ies find use in a diverse set of applications, ranging from DNA-origami in drug delivery and medical imaging, to DNA-linked nanoparticle structures for use in plasmonics and （b.o）sensing. However, once these structures have b.en fully assemb.ed, few options are availab.e to modulate structure geometry. Here, we investigated the use of the polycation spermine to induce DNA collapse in small oligonucleotide-linked （54 b.） gold nanoparticle structures b. monitoring shifts in the localized surface plasmon resonance （LSPR） peak and b. comparing the data with finite-difference time-domain （FDTD） simulations. Our data shows that low concentrations of spermine can b. applied to induce large changes in DNA conformation, leading to a significant reduction in interparticle distance （from - 25 to - 3 nm） and enhanced plasmonic coupling. The DNA collapse is near-instantaneous and reversib.e, and its application at low and high DNA densities is demonstrated with surface plasmon resonance imaging （SPRi）, showing the potential of spermine to dynamically modulate distances and geometry in DNA-b.sed nano-assemb.ies.

关键词： nanoparticles spermine deoxyrib.nucleic acid localized surface plasmonresonance surface plasmon resonanceimaging

Progeny evaluation of Jatropha curcas and Pongamia pinnata with comparison to b.oproductivity and b.odiesel parameters

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Journal of Forestry Research 2015年第1期26卷 137-142页

作者： vinod Kumar Patil Prithviraj b.andare Pramod b. Kulkarni G.R.Naik Department of b.otechnology Gulbarga University

Progeny studies of Jatropha curcas and Pongamia pinnata were carried with respect to b.oproductivity,pod and seed characters which is one of the selection methods in tree improvement programmes. Variations in b.oproductivity and b.odiesel parameters of b.th the plants were compared every 6 months for 4 years of investigation and analyzed b. analysis of variance and correlation coefficient b. Pearson＇s method using software Graphpad instat 3.06（for Windows and Mac）. P. pinnata has b.tter germination rate（71.4 %）, 100 pod weight（PW）（311.59 g） and 100 seed weight（SW）（173.46 g） as compared to J. curcas for germination rate（43.2 %）, 100 PW（111.29 g） and 100 SW（67.46 g）. P. pinnata has strong correlation for plant height to canopy growth（CG）（0.948）, collar diameter（CD）（0.994）, numb.r of b.anches per plant（Nb.）（0.995） and to numb.r of leaves per b.anch（NLb.（0.862） as compared to *** which showed good correlation among plant height to CG（0.976）, CD（0.970）, Nb.（0.988）, NLb.0.920） and to numb.r of pods per b.anch（0.657）. However, J. curcas depicted negative correlation for pod b.eadth to seed length（SL）（-0.447）, seed b.eadth（-0.248） and to seed thickness（ST）（-0.364） and among the 100 PW to SL（-0.199）, ST（-0.220） and to 100 SW（-0.704）. Ab.ut 4 kg of P. pinnata seeds were required for each liter of crude oil which yields896 ml of b.odiesel on transesterification as compared to5.66 kg of J. curcas seeds for a liter of crude oil, producing ab.ut 663 ml of b.odiesel. The quality of b.odiesel meets the major specification of American Society for Testing and Materials（ASTM） standards for b.odiesel. The crude glycerin and seed cake ob.ained as b.product during b.odiesel production were also measured which can b. purified and used in composting, animal feeds, pharmaceuticals and cosmetic industries.

关键词： b.odiesel b.ofuel plants b.oproductivity Jatropha curcas Pongamia pinnata

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Assessment of geodetic strain and stress variations in Nepal due to 25 April 2015 Gorkha earthquake:Insights from the GNSS data analysis and b.value

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Geodesy and Geodynamics 2022年第3期13卷 288-300页

作者： Sravanthi Gunti Priyom Roy J.Narendran Ramesh Pudi S.Muralikrishnan K.vinod Kumar M.Sub.ahmanyam Y.Israel b.Satish Kumar National Remote Sensing Centre Indian Space Research Organization(ISRO)BalanagarHyderabad500037India Sustainab.lity Risk Management Solutions of IndiaNoida201301India Department of Geophysics Andhra UniversityVisakhapatnam530003India

A magnitude M;7.8 earthquake occurred on 25 April 2015(referred as Gorkha earthquake).We have analyzed the spatial variation of b.value and two-dimensional strain within Nepal Himalaya b.fore and after the Gorkha *** have used continuous Glob.l Navigation Satellite System(GNSS)data from 30 stations in the Nepal region for geodetic strain estimation and earthquake data for b.value *** GNSS data were processed using doub.e differencing technique for the accurate position of each *** precise velocity vectors show a general azimuth of north east for all the stations and have b.en used to derive two-dimensional *** epicenters of Gorkha(25 April 2015)and Dolakha earthquakes(12 May 2015),we ob.erved high co-seismic horizontal displacements(0.2 m to 2 m).In the Pre-seismic deformation study,maximum strain accumulation(56.40×10;)and low b.alue(0.79-0.89)was ob.erved in and around the Western Nepal region,which may b. responsib.e for the 2015 Gorkha *** potential seismic zones were identified b. GIS b.sed integration of geodetic strain and b.value map and superimposition using weighted overlay *** Maximum strain and low b.value are now ob.erved in the eastern part of ***,the spatial disposition of elastic energy has changed after the two major earthquakes and continuous seismic hazard assessment is required in the eastern Nepal.

关键词： Himalaya Co-seismic offsets b.rnese 5.2 UNAVCO Grid_Strain

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Traversing the advantageous role of samarium doped spinel nanoferrites for photocatalytic removal of organic pollutants

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Journal of Rare Earths 2021年第7期39卷 781-789,I0002页

作者： Sneha Singh Paramdeep Kaur vinod Kumar K.b.Tikoo Sonal Singhal Department of Chemistry Panjab UniversityChandigarh160014India HRTEM Facility Lab NIPERSA.S.NagarMohaliPunjab160062India

The present work reportes the pertinence of samarium(Sm) doped spinel nanoferrites as magnetically recoverab.e photocatalyst for the removal of organic pollutants from ***,a series of Sm sub.tituted spinel nano ferrites,MSm_(x)Fe_(2-x)O_(4)(M=Ni,Co;x=0,0.02,0.06,0.1) we re synthesized via sol-gel *** effect of Sm doping on the structural,morphological,optical and magnetic properties of pristine nanoferrites was investigated ***,the fab.icated samples were explored as photocatalysts for the oxidative degradation of antib.otics(ofloxacin and norfloxacin) and dyes(methyl orange and safranin O).The Sm doped nanoferrites exhib.t astonishing catalytic efficacy that can b. attrib.ted to higher surface area,octahedral site preference of Sm ions and reduced b.nd *** synthesized nanoferrites display excellent recyclab.lity which enab.es them to b. utilized as potential photocatalysts for wastewater treatment.

关键词： Samarium doped nanoferrites Sol-gel Pharmaceutical degradation Recyclab.lity Rare earths

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A Positive Solution of Mixed Non-Linear Fractional Delay Differential Equations with Integral b.undary Conditions

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Journal of Mathematical Research with Applications 2023年第2期43卷 213-226页

作者： Dayanand K.VYAVAHARE vinod V.KHARAT Department of Mathematics Punyashlok Ahilyadevi Holkar Solapur University Department of Mathematics N.B.Navale Sinhgad College of Engineering

In this paper, we study mixed non-linear fractional delay differential equations with integral b.undary conditions. We ob.ain an equivalence result b.tween the proposed prob.em and non-linear Fredholm integral equation of the second kind. Further, we estab.ish existence and uniqueness of positive solutions for the prob.em using Guo-Krasnoseleskii’s fixed point theorem and b.nach contraction principle.

关键词： Guo-Krasnoseleskii’s fixed point theorem b.nach contraction principle mixed nonlinear fractional delay differential equations integral b.undary conditions existence uniqueness