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Petrology,genesis and geodynamic implication of the Mesoproterozoic-Late Cretaceous Timmasamudram kimberlite cluster,Wajrakarur field,Eastern Dharwar Craton,southern India

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Geoscience Frontiers 2017年第3期8卷 541-553页

作者： Ashish Dongre N.V.Chalapathi rao K.S.Viljoen b.Lehmann Department of Geology University of Johannesburg Department of Geology Centre of Advanced StudyBanaras Hindu University Mineral Resources Technical University of Clausthal

New mineralogical and bulk-rock geochemical data for the recently recognised Mesoproterozoic （ca. 1100 Ma） and late Cretaceous （ca. 90 Ma） kimberlites in the Timmasamudram cluster （TKC） of the Wajrakarur kimberlite field （WKF）, Eastern Dbarwar Craton, southern India, are presented. On the basis of groundmass mineral chemistry （phlogopite, spinel, perovskite and clinopyroxene）, bulk-rock chem- istry （SiO2, K20, low TiO2, ba/Nb and La/Sm）, and perovskite Nd isotopic compositions, the TI（-1 （mac- rocrystic variety） and TI（-4 （Macrocrystic variety） kimberlites in this cluster are here classified as orangeites （i.e. Group II kimberlites）, with geochemical characteristics that are very similar to orangeites previously described from the bastar Craton in central India, as well as the Kaapvaal Craton in South Africa. The remaining kimberlites （e.g., TK-2, TK-3 and the TK-1 microcrystic variant）, are more similar to other 1100 Ma, Group l-type kimberlites of the Eastern Dharwar Craton, as well as the typical Group I kimberlites of the Kaapvaal Craton. Through the application of geochemical modelling, based on pub- lished carbonated peridotite/melt trace element partition coefficients, we show that the generation of the TI（C kimberlites and the orangeites results from low degrees of partial melting of a metasomatised, carbonated peridotite. Depleted mantle （TDM） Nd perovskite model ages of the 1100 Ma Timmasamudram kimberlites show that the metasomatic enrichment of their source regions are broadly similar to that of the Meso- proterozoic kimberlites of the EDC. The younger, late Cretaceous （ca. 90 Ma） TI（-1 （macrocrystic variant） and TK-4 kimberlites, as well as the orangeites from the 8astar Craton, share similar Nd model ages of 1100 Ma, consistent with a similarity in the timing of source enrichment during the amalgamation of Rodinia supercontinent. The presence of late Cretaceous diamondiferous orangeite activity, presumably related to the location of the Marion hotspot

关键词： Kimberlite Orangeite Diamond Timmasamudram Wajrakarur India

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A Note on the Indirect Controls for a Coupled System of Wave Equations

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Chinese Annals of Mathematics,Series b 2022年第3期43卷 359-372页

作者： Tatsien LI bopeng rao School of Mathematical Sciences Fudan UniversityShanghai 200433China Shanghai Key Laboratory for Contemporary Applied Mathematic Shanghai 200433China Nonlinear Mathematical Modeling and Methods Laboratory Shanghai 200433China Institut de Recherche Mathématique Avancée Universitéde Strasbourg67084 StrasbourgFrance

by a procedure of successive projections,the authors decompose a coupled system of wave equations into a sequence of ***,they can clarify the indirect controls and the total number of ***,the authors give a uniqueness... 详细信息

关键词： Indirect controls Approximate controllability Coupled system of wave equations

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Evaluation of in-vitro antibacterial activity and anti-inflammatory activity for different extracts of Rauvolfia tetraphylla *** bark

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Asian Pacific Journal of Tropical biomedicine 2012年第10期2卷 818-821页

作者： b.Ganga rao P.Umamaheswara rao E.Sambasiva rao T.Mallikarjuna rao V.S.Praneeth.D A.U College of Pharmaceutical Sciences Andhra UniversityVisakhapatnamA.P

Objective:To assess the in-vitro antihacterial activity and anti-inflammatory activity of orally administered different extracts(Hydro-alcoholic,methanolic,ethyl acetate and hexane)of Rauvolfia tetraphylla(***)root bark in Carrageetiaii induced acute inflammation in ***:In-vitro antibacterial activity was evaluated for extracts against four Gram positive and four Gram negative bacteria by using cylinder plate ***-alcoholic extract(70%v/v ethanol)at 200,400 and 800 mg/kg doses and methanolic,ethyl acetate and hexane extracts at doses 100,200 and 400 mg/kg were tested for anti-inflammatory activity in Carrageenan induced rat paw oedema model and paw thickness was measured every one hour up to 6 ***:All extracts of *** root bark showed good zone of inhibition against tested bacterial *** Carrageenan induced inflammation model,hydro-alcoholic and methanolic extract of *** root bark at three different doses produced significant(Pbark shows good in-vitro antibacterial activity and in-vivo anti-inflammatory activity in rats.

关键词： Rauvolfia tetraphylla Root bark In-vitro antibacterial activity Inflammation Anti-inflammatory activity

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Delamination Testing of AlSi10Mg Sandwich Structures with Pyramidal Lattice Truss Core made by Laser Powder bed Fusion

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Chinese Journal of Mechanical Engineering 2021年第6期34卷 51-62页

作者： M.Nuño J.bühring M.N.rao K.-U.Schröder Institute of Structural Mechanics and Lightweight Design RWTH Aachen UniversityWüllnerstraβe 752072 AachenGermany

Sandwich structures possess a high bending stiffness compared to monolithic structures with a similar *** makes them very suitable for lightweight applications,where high stiffness to weight ratios are *** common manufacturing methods of sandwich structures involve adhesive bonding of the core material with the ***,adhesive bonding is prone to delamination,a failure mode that is often difficult to *** paper presents the results of delamination testing of fully additive manufactured(AM)AlSi10Mg sandwich structures with pyramidal lattice truss core using Laser Powder bed Fusion(LPbF).The faces and struts are 0.5 mm thick,while the core is 2 mm *** inclination of the struts is 45°.To characterise the bonding strength,climbing drum peel tests and out-of-plane tensile tests are *** formulas are derived to predict the expected failure loads and *** analytics and tests are supported by finite element(FE)*** the analytic approach,design guidelines to avoid delamination in AM sandwich structures are *** study presents a critical face sheet thickness to strut diameter ratio for which the structure can *** ratio is mainly influenced by the inclination of the *** peel tests resulted in face yielding,which can also be inferred from the analytics and *** out-of-plane tensile tests didn’t damage the structure.

关键词： Additive Manufacturing Sandwich Structures Pyramidal Lattice Core

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Strong (Weak) Exact Controllability and Strong (Weak) Exact Observability for Quasilinear Hyperbolic Systems

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Chinese Annals of Mathematics,Series b 2010年第5期31卷 723-742页

作者： Tatsien LI bopeng rao School of Mathematical Sciences Fudan University Shanghai 200433 China Shanghai Key Laboratory for Contemporary Applied Mathematics Nonlinear Mathematical Modeling and Methods Laboratory. Institut de Recherche Mathematique Avancee Universite de Strasbourg 67084 Strasbourg France.

In this paper,the authors define the strong (weak) exact boundary controllability and the strong (weak) exact boundary observability for first order quasilinear hyperbolic systems,and study their properties and the re... 详细信息

关键词： Strong (weak) exact boundary controllability Strong (weak) exact boundary observability First order quasilinear hyperbolic system

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Performance analysis of multiple gain boost converter with hybrid maximum power point tracker for solar PV connected to grid

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Clean Energy 2021年第4期5卷 655-672页

作者： b.M.Kiran Kumar M.S.Indira S.Nagaraja rao M S Ramaiah University of Applied Sciences Department of Electrical EngineeringBangaloreIndia-560058

This paper analyses the performance of a multiple gain boost converter(MGbC)connected to a solar photovoltaic(SPV)system with a grid-tied *** capacitor inductor capacitor(CLC)-based MGbC is integrated to lift the output voltage of the SPV to the required *** voltage lifts/levels in a boost converter(bC)are based on the number of CLC *** suggested MGbC is compared with various conventional bCs in terms of boost factor and component count.A hybrid fuzzy logic-perturb&observe maximum power point tracker(HFL-P&O MPPT)developed is used to monitor P_(max)(maximum power)generated by the ***,a comparative analysis of the suggested MPPT with a conventional P&O and fuzzy logic-based(FLb)MPPT for a CLC-based MGbC is *** comparison is made in terms of rise time,voltage ripples(%),steady-state time and boost *** output characteristics of the developed model for different irradiation conditions are analysed using the MATLAb/Simulink *** MPPT simulation result exhibits minimum oscillations at MPP and a significantly better rise time of 0.015 s when compared with a conventional MPPT and FLb *** proposed CLC-MGbC gives an appreciable boost factor of *** generated SPV power is supplied to the grid through a conventional inverter and synchronized using a phase-locked loop *** total harmonic distortion of 1.66%obtained in the output current of the inverter is within the permissible range of the IEEE standards.

关键词： CLC-MGbC FLb MPPT Grid-tie inverter SPV THD

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Exact Synchronization for a Coupled System of Wave Equations with Dirichlet boundary Controls

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Chinese Annals of Mathematics,Series b 2013年第1期34卷 139-160页

作者： Tatsien LI bopeng rao Nonlinear Mathematical Modeling and Methods Laboratory Shanghai Key Laboratory for Contemporary Applied Mathematic School of Mathematical Sciences Fudan University Institut de Recherche Mathématique Avancée Université de Strasbourg

In this paper, the exact synchronization for a coupled system of wave equations with Dirichlet boundary controls and some related concepts are introduced. by means of the exact null controllability of a reduced coupled system, under certain conditions of compatibility, the exact synchronization, the exact synchronization by groups, and the exact null controllability and synchronization by groups are all realized by suitable boundary controls.

关键词： Exact null controllability Exact synchronization Exact synchronizationby groups

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Exact boundary Controllability for a Coupled System of Wave Equations with Neumann boundary Controls(Dedicated to Professor Haim brezis on the occasion of his 70th birthday)

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Chinese Annals of Mathematics,Series b 2017年第2期38卷 473-488页

作者： Tatsien LI bopeng rao school of mathematical sciences fudan universityShanghai 200433China/shanghai key laboratory for contemporary applied mathematics/nonlinear mathematical modeling and methods laboratory institut de recherche mathmatique avancée universite de strasbourgFrance

This paper first shows the exact boundary controllability for a coupled system of wave equations with Neumann boundary controls. In order to establish the corresponding observability inequality, the authors introduce a compact perturbation method which does not depend on the Riesz basis property, but depends only on the continuity of projection with respect to a weaker norm, which is obviously true in many cases of application. Next,in the case of fewer Neumann boundary controls, the non-exact boundary controllability for the initial data with the same level of energy is shown.

关键词： Compactness-uniqueness perturbation, boundary observability, Exactboundary controllability, Non-exact boundary controllability, Coupledsystem of wave equations, Neumann boundary condition

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e-FILTERS OF MS-ALGEbRAS

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Acta Mathematica Scientia 2013年第3期33卷 738-746页

作者： M. Sambasiva rao Department of Mathematics M.V.G.R. College of EngineeringChintalavalasa Vizianagaram Andhra Pradesh India-535005

The notion of e-filters is introduced in an MS-algebra and characterized. The concept of D-filters is introduced and a set of equivalent conditions under which every D-filter is an e-filter are given. The properties of the space of all prime e-filters of an MS-algebra are observed. The concept of D-prime filters is introduced and then a set of equivalent conditions axe derived for a prime e-filter to become a D-prime filter in topological terms.

关键词： MS-algebra e-filter dense element D-filter D-prime filter minimal prime filter Hausdorff space

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Investigation of hepatoprotective activity of Cyathea gigantea(***.)leaves against paracetamol-induced hepatotoxicity in rats

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Asian Pacific Journal of Tropical biomedicine 2012年第5期2卷 352-356页

作者： P Madhu Kiran A Vijaya Raju b Ganga rao A.U College of Pharmaceutical Sciences Andhra University

Objective:To investigate the hepatoprotective activity of methanolic leaf extract of Cyathea gigantea(***)against paracetamol induced liver damage in ***:The hepatoprotective activity for plant extract was investigated for paracetamol induced hepatoxicity in *** albino rats of either sex were divided into five groups of 6 animals each and are given orally the following treatment for seven *** normal control group was given 1%*** 1mL/kg bw,*** at dose of 1g/kg bw,*** given as toxic dose for inducing ***(50mg/kg.p.o.) was given as reference *** doses of C. gigantea extract i.e.,100 mg/*** 200 mg/kg,*** tested for hepatoprotective activity. The treatment was given for seven days and after 24 h of last treatment blood was collected from retro-orbital plexus and analysed for various serum parameters like serum glutamic-oxaloacetic transaminase(SGOT),serum glutamic pyruvic transaminase(SGPT),alkaline phosphatase(ALP),total bilirubin(Tb)and total protein(TP)in different ***:The paracetamol intoxication lead to histological and biochemical *** treatment with methanolic leaf extract of *** reduced the elevated levels of SCOT,SGPT,ALP,Tb and also reversed the hepatic damage towards normal which further supports the hepatoprotective activity of leaf extract of ***:The methanolic extract of leaves of *** at doses of 100 mg/kg bw and 200 mg/kg bw have significant effect on liver of paracetamol induced hepatotoxicity model in rats.

关键词： Hepatoprotective Cyathea gigantea Paracetamol Silymarin Hepatotoxicity

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