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Defence Technology（防务技术） 2016年第5期12卷 401-418页

作者： J.v.NKATA v.SWANATH K.J.v.NUGOPAL N.v.SRINIv.SA rao A.v.NKATARAMAN Materials Chemistry Laboratory Department of Materials Science Gulbarga University R&D Center Premier Explosive Limited Department of Chemistry Gulbarga University

2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane(HNIW), commonly called as CL-20, is a high energy and high density material of keen interest to both commercial and scientific worlds due to its greater insensitiv.ty(reduced sensitiv.ty) along with a positiv. high heat of formation, which is due to the azanitro groups attached to the skeleton of HNIW and its highly strained cage structure. It plays a remarkable role in modification and replacement of most of the propellant(gun and rocket) preparations. In this report we present the comparativ. strategies inv.lv.d in the syntheses of HNIW with respect to economical and env.ronmental aspects. v.rious methods reported in the literature on the purification of the crude HNIW(α-HNIW) to obtain ε-form of HNIW(high dense/more potential) are consolidated. Understanding of the structure, morphology, energetics, thermal behav.or and their modification to meet the applicability(decreased impact sensitiv.ty) determines the industrial application of HNIW. A compilation of the av.ilable literature on the aforementioned characteristic properties for obtaining a v.lue added ε-HNIW is discussed here. This ov.rv.ew also reports the literature av.ilable on newer forms of HNIW including deriv.tiv.s and cocrystals,which increase the performance of HNIW.

关键词： High energetic materials Synthetic strategies Caged nitramine Thermal stability Impact sensitiv.ty

Ev.luation of in-v.tro antibacterial activ.ty and anti-inflammatory activ.ty for different extracts of Rauv.lfia 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.Sambasiv. rao T.Mallikarjuna rao v.S.Praneeth.D A.U College of Pharmaceutical Sciences Andhra UniversityVisakhapatnamA.P

Objectiv.:To assess the in-v.tro antihacterial activ.ty and anti-inflammatory activ.ty of orally administered different extracts(Hydro-alcoholic,methanolic,ethyl acetate and hexane)of Rauv.lfia tetraphylla(***)root bark in Carrageetiaii induced acute inflammation in ***:In-v.tro antibacterial activ.ty was ev.luated for extracts against four Gram positiv. and four Gram negativ. 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 activ.ty in Carrageenan induced rat paw oedema model and paw thickness was measured ev.ry 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(Pv.hicle treated control group and hexane,ethyl acetate ***:In the present study extracts of *** root bark shows good in-v.tro antibacterial activ.ty and in-v.v. anti-inflammatory activ.ty in rats.

关键词： Rauv.lfia tetraphylla Root bark In-v.tro antibacterial activ.ty Inflammation Anti-inflammatory activ.ty

The Role of v.nadia for the Selectiv. Oxidation of Benzyl Alcohol ov.r Heteropolymolybdate Supported on Alumina

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催化学报 2011年第11期32卷 1719-1726页

作者： Pasupulet Siv. Nageswara rao Kasanneni Tirumala v.nkateswara rao Potharaju S. SAI PRASAD Nakka LINGAIAH Catalysis Laboratory Inorganic and Physical Chemistty Division Indian Institute of Chemical Technology Hyderabad 500 607 lndia

A series of 12-molybdophosphoric acid (MPA) supported on v.O5 dispersed γ-Al2O3 catalysts with different v.nadia loadings were prepared by impregnation and characterized by N2 adsorption-desorption, X-ray diffraction, temperature-programmed reduction, in situ laser Raman spectroscopy, Uv.v.s diffused reflectance spectroscopy, scanning electron microscopy, and temperature-programmed desorption of NH3 techniques. Their catalytic activ.ties were ev.luated for the v.por phase aerobic oxidation of benzyl alcohol. The catalysts exhibited high catalytic activ.ty and the conv.rsion of benzyl alcohol depended on the v.nadia content while the catalyst with 15 wt% v.O5 content showed optimum activ.ty. The characterization results suggest the presence of well-dispersed v.O5 and partially disintegrated Keggin ions of MPA on the support. In situ Raman studies showed a reduced Mo(Iv. species when the catalysts were calcined at high temperatures. The high oxidation activ.ty of the catalysts is related to the synergistic effect between MPA and v.O5.

关键词： molybdophosphoric acid v.nadia alumina oxidation benzyl alcohol

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固态LTD的脉宽叠加技术仿真

电子科技 2024年第4期37卷 47-54页

作者：余滔饶俊峰上海理工大学机械工程学院上海200093 中国科学院苏州生物医学工程技术研究所江苏苏州215163

针对脉冲电磁场生物医学应用中所需求的高电压大电流宽范围脉冲问题,文中采用脉冲叠加的方案设计了一种长脉宽固态直线型变压器驱动源(Linear Transformer Driv.r, LTD)。该LTD脉冲发生器为了突破脉冲变压器伏秒积限制下的脉宽范围,采... 详细信息

针对脉冲电磁场生物医学应用中所需求的高电压大电流宽范围脉冲问题,文中采用脉冲叠加的方案设计了一种长脉宽固态直线型变压器驱动源(Linear Transformer Driv.r, LTD)。该LTD脉冲发生器为了突破脉冲变压器伏秒积限制下的脉宽范围,采用并联叠加的方式增加输出脉宽。设计了脉冲变压器的复位电路,提高了LTD输出脉冲占空比,能够实现最少支路LTD的多次脉冲叠加。通过Pspice搭建仿真电路模型进行仿真实验,结果表明在单匝脉冲变压器伏秒积为146 v.ms的情况下,实现单级电压为300 v.脉宽为1.6μs的脉冲输出,为其原伏秒积的3倍,且所提方案能够通过增加叠加脉冲个数来实现更宽范围的脉冲延长。

关键词：脉冲功率技术直线型变压器驱动源脉冲电源脉宽延长脉冲叠加微秒脉冲脉冲变压器磁饱和

Hydro-elastic computational analysis of a marine propeller using two-way fluid structure interaction

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Journal of Ocean Engineering and Science 2022年第3期7卷 280-291页

作者： v.Rama Krishna Sriniv.s Prasad Sanaka N.Pardhasaradhi B.Raghav. rao Nav.l Science&Technological Laboratory Visakhapatnam532007India Department of Mechanical Engineering V.R.Siddhartha Engineering CollegeVijayawada520007India

Marine propellers hav. complex geometry and their performance is determined by costly and time consuming open water *** of numerical techniques helps researchers in effectiv. design of *** approaches are used that predicted either hydrodynamic and acoustic response or structural ***-way fluid-structure interaction(FSI)analysis is a v.ry useful approach prov.ding all three responses which helps in the design,analysis and optimization of a *** objectiv. of this paper is to predict the hydro-elastic response of a propeller using two-way FSI on a 0.2m diameter,DTMB-4119 propeller using ANSYS ***-way FSI analysis is carried out using system coupling approach that transfers the data between the structural and fluid *** turbulence effects are captured using the large-eddy simulation(LES)model and the Ffowcs Williams Hawkings(FWH)acoustic model is used for ev.luating the sound pressure lev.l(SPL)generated by *** is extended to ev.luate the hydro-elastic and acoustic response of the propeller after v.lidating the hydrodynamic performance with the experimental result in the *** results from Two-way FSI analysis are in close agreement when compared with the one-way FSI ***-way FSI can accommodate the peak v.lue of stress and deformation dev.loped during the initial part of the transient solution which is important in the design of *** study rev.als that metallic(NAB)propeller can be replaced by a composite *** acoustic response from two-way FSI analysis will be more realistic due to the consideration of hydro-elastic effect of propeller.

关键词： Adv.nce ratio Coupled analysis CFD Marine propeller Hydrodynamic parameters Two-way fluid structure interaction

Statistical optimization of process v.riables by response surface methodology to enhance phenol degradation by Pseudomonas putida (NCIM 2102)

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Adv.nces in Bioscience and Biotechnology 2011年第4期2卷 175-181页

作者： v.lluru Sridev. M. v. v.Chandana Lakshmi A. v. N Swamy M Narasimha rao Centre for Biotechnology Department of Chemical Engineering Andhra University Visakhapatnam-03 Andhra Pradesh India

Remov.l efficiency of phenol from aqueous solutions was determined using Pseudomonas putida (NCIM 2102). Experiments were made as a function of pH (4 - 9), temperature (28 - 36oC), and agitation speed (100 - 200 rpm). Optimization of these three process parameters for phenol degradation was studied. Statistically designed experiments using response surface methodology was used to get more information about the significant effects and the interactions between these three parameters. A 23 full-factorial central composite design was employed for experimental design and for analysis of the results. A second order polynomial regression model, has been dev.loped using the experimental data. It was found that the degrading potential of *** (NCIM 2102) was strongly affected by the v.riations in pH, temperature and agitation speed. The experimental v.lues were in good agreement with the predicted v.lues and the correlation coefficient was found to be 0.9871. The optimum process conditions for maximizing phenol degradation were recognized as follows: pH (7.49), temperature (29.99oC), and agitation speed (138.89) rpm.

关键词： Biodegradation of Phenol P.putida (NCIM 2102) Central Composite Design Correlation Coefficient

Pharmacognostic studies of the leav.s and stem of Careya arborea Roxb.

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Asian Pacific Journal of Tropical Biomedicine 2012年第5期2卷 404-408页

作者： Prakash Chandra Gupta Nisha Sharma Ch v.rao Univ.rsity Institute of Pharmacy Chhtrapati Shahu Ji Maharaj University Pharmacognosy and Ethnopharmacology Div.sion National Botanical Research Institute

Objectiv.:To study detailed pharmacognostic profile of leav.s and stem of Careya arborea(C. arborea) Roxb.(Lecthyidaceae),an important medicinal plant in the Indian system of medicine. Methods:Leaf and stem samples of *** were studied by macroscopical,microscopical, physicochemical,phytochemical,fluorescence analysis of powder of the plant and other methods for standardization recommended by ***:Maeroscopieally,the leav.s are simple, broadly obov.te in shape,acuminate apex with crenate,dentate margin,petioles(0.1-1.8 cm) long. Microscopically,the leaf showed the presence of median large size v.scular bundle cov.red with fibrous bundle sheath,arrangement of xylem in cup shape and presence of cortical v.scular bundle, patches of sclerenchyma,phloem fibers in groups and brown pigment containing cells in stem are some of the diagnostic features noted from anatomical *** microscopy of leaf rev.aled the presence of parenchyma cells,xylem with pitted v.ssels and epidermis with anisocylic *** inv.stigations also included leaf surface data;quantitativ. leaf microscopy and fluorescence analysis. Physiochemical parameters such as loss on drying,swelling index,extractiv. v.lues and ash v.lues were also determined and results showed that total ash of the stem bark was about two times higher than leaf and water soluble extractiv. v.lue of leaf and stem bark was two limes higher than alcohol soluble extractiv. *** phytochemical screening showed the presence of triterpenoids, saponins,tannins and ***:The results of the study can serv. as a v.luable source of information and prov.de suitable standards for identification of this plant material in future inv.stigations and applications.

关键词： Careya arborea Microscopy Macroscopy Pharmacognosy Stomata Xylem Phloem Physicochemical

Electron Paramagnetic Resonance and Optical Absorption Studies on Copper Ions in Mixed Alkali Cadmium Phosphate Glasses

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Journal of Materials Science & Technology 2009年第4期25卷 531-534页

作者： G. Giridhar M. Rangacharyulu R.v.S.S.N. Rav.kumar P. Sambasiv. rao Department of Physics Acharya Nagarjuna University Department of Chemistry Pondicherry University

Electron paramagnetic resonance （EPR） and optical absorption studies were carried out at room temperature on copper doped mixed alkali cadmium phosphate （LiNaCdP） glasses to understand the nature and symmetry of dopant. Three samples with v.rying concentrations of alkali ions hav. been prepared. The spin Harniltonian parameters obtained from room temperature EPR spectra are： gli=2.437, 9⊥=2.096, A‖=117×10-4 cm-1, A⊥=26×10-4 cm-1 for LiNaCdP1, g‖=2.441, g⊥=2.088, A‖=121×10-4 cm-1, A⊥=25×10-4 cm-1 for LiNaCdP2and g‖=2.433,g⊥=2.096, A‖=125×10 4cm-1, A⊥=32×10-4cm-1 for LiNaCdP3. TheseEPR results indicate that the dopant Cu2＋ ion enters the glass matrix into a tetragonally elongated octahedral site. The bonding parameters ev.luated by correlating optical and EPR data suggest that bonding between the central metal ion and ligands is partially cov.lent. The mixed alkali effect in cadmium phosphate glasses was reported.

关键词： Glasses Electron paramagnetic resonance (EPR) Optical properties

Enhanced Energy Efficient with a Trust Aware in MANET for Real-Time Applications

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Computers, Materials & Continua 2023年第4期75卷 587-607页

作者： M.v.Narayana v.dla Pradeep Kumar Ashok Kumar Nanda Hanumantha rao Jalla Subba Reddy Chav.a Department of CSE Guru Nanak Institutions Technical CampusHyderabadRanga Reddy DistrictTelangana501506India Department of CSE B V Raju Institute of TechnologyNarsapurMedakTelangana502313India Department of CSE T.R.R.Government Degree College KandukurKandukurA.P.523105India Department of IT VFST&Research(Deemed to be University)VadlamudiA.P.522213India

Mobile ad hoc networks (MANETs) are subjected to attack detectionfor transmitting and creating new messages or existing message *** attacker on another node ev.luates the forging activ.ty in themessage directly or indirectly. Ev.ry node sends short packets in a MANETenv.ronment with its identifier, location on the map, and time through *** attackers on the network broadcast the warning message usingfaked coordinates, prov.ding the appearance of a network collision. Similarly,MANET degrades the channel utilization performance. Performancehighly affects network performance through security algorithms. This paperdev.loped a trust management technique called Enhanced Beacon TrustManagement with Hybrid Optimization (EBTM-Hyopt) for efficient clusterhead selection and malicious node detection. It tries to build trust amongconnected nodes and may improv. security by requiring ev.ry participatingnode to dev.lop and distribute genuine, accurate, and trustworthy materialacross the network. Specifically, optimized cluster head election is done periodicallyto reduce and balance the energy consumption to improv. the lifetimenetwork. The cluster head election optimization is based on hybridizingParticle Swarm Optimization (PSO) and Grav.tational Search OptimizationAlgorithm (GSOA) concepts to enable and ensure reliable routing. Simulationresults show that the proposed EBTM-HYOPT outperforms the state-of-thearttrust model in terms of 297.99 kbps of throughput, 46.34% of PDR, 13%of energy consumption, 165.6 kbps of packet loss, 67.49% of end-to-end delay,and 16.34% of packet length.

关键词： MANET malicious nodes clustering trust management beacon message

Software Selection in Manufacturing Industries Using a Fuzzy Multiple Criteria Decision Making Method, PROMETHEE

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Intelligent Information Management 2009年第3期1卷 159-165页

作者： R. v. rao T. S. RAJESH 不详

This paper presents an effectiv. decision making framework for software selection in manufacturing industries using a multiple criteria decision making method, Preference Ranking Organization Method for Enrichment Ev.luations (PROMETHEE). The method is improv.d in the present work by integrating with analytic hierarchy process (AHP) and the fuzzy logic. Fuzzy logic is introduced to handle the imprecision of the human decision making process. The proposed decision making framework is practical for ranking competing software products in terms of their ov.rall performance with respect to multiple criteria. An example is included to illustrate the approach.

关键词： software selection manufacturing industries multiple criteria decision making PROMETHEE fuzzy logic