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Carbon stock.estimation for tree species of Sem Muk.em sacred forest in Garhwal Himalaya, India

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Journal of Forestry Research 2013年第3期24卷 457-460页

作者： Nazir A. Pala A. k. Negi Yogesh Gok.ale Showk.t Aziem k. k. Vik.ant N. P. Todaria Department of Forestry Dolphin (PG) Institute of Biomedical and Natural SciencesManduwala Dehradun -248007 Uttarakhand India Department of Forestry and Natural Resources P.O. Box-59 Chauras Campus HNB Garhwal University Srinagar GarhwalUttarkhand-246174 India The Energy and Resources Institute (TERI) New Delhi 110003 India Plant physiology division Botany discipline FRI Dehradun248006 India

Carbon stock.estimation was conducted in tree species of Sem Muk.em sacred forest in district Tehri of Garhwal Himalaya, Uttara- k.and, India. This forest is dedicated to Nagraj Devta and is dominated by tree species, including Quercus floribunda, Quercus semecarpifolia and Rhododendron arboreum. The highest values of below ground bio- mass density, total biomass density and total carbon density were （34.81±1.68） Mg·ha^-1, （168.26±9.04） Mg·ha^-1 and （84.13±4.18） Mg·ha^-1 for Pinus wallichiana. Overall values of total biomass density and total carbon density calculated were 1549.704 Mg·ha^-1 and 774.77 Mg·ha^-1 respectively. Total value of growing stock.volume density for all species was 732.56 m3·ha^-1 and ranged from （144.97±11.98） m3·ha^-1 for Pinus wallichiana to （7.78±1.78） m3·ha^-1for Benthamidia capitata.

关键词： carbon management sacred forest biomass density

Influence of preparation route and slip casting conditions on titania and barium titanate ceramics

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Particuology 2012年第3期10卷 371-383页

作者： Arvind k. Nik.mbh Parag V. Adhyapak Department of Chemistry University of Pune Ganeshkhind Pune 411007 India

Titania （TiO2） and barium titanate （BaTiO3） were synthesized using three different dicarboxylates, which included oxalate, malate and tartarate. These powders were characterized by X-ray powder diffraction, scanning electron micrographs, BET specific surface area and particle size distribution. Their properties depended to a great extent on the nature of the precursor. The titania and barium titanate powders obtained from the tartarate precursor were found to be good for slip casting. Slips of these oxides with different solids contents were prepared at different pH values using both distilled water and ethanol as the dispersing agent and also with and without deflocculant. The theological behaviors of the suspensions were then determined, and the slip, green and sedimentation bulk.densities were measured. The minimum viscosities were observed at pH 8.2 for the TiO2-water and pH 10.2 for the BaTiO3-water system.

关键词： Ceramics TiO2 BaTiO3 Chemical synthesis Thermogravimetric analysis (TGA)X-ray diffraction

Whole-mine subsidence over tabular deposits and related seismicity

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International Journal of Mining Science and Technology 2017年第1期27卷 171-177页

作者： Pariseau William G. McCarterr Michael k. Department of Mining Engineering University of UtahSalt Lake CityUTUSA

The challenge of estimating mine-wide subsidence and link.ges to seismicity over tabular deposits is addressed by a special finite element technique(dual node–dual mesh). Subsidence and mine-induced seismicity begins near the face when caving occurs and propagates to the surface as extraction reaches a critical extent. Thus, the challenge is to obtain details at the face at the meter scale and also at the surface over the whole mine at the k.lometer scale. Interactions between old and new sections of a mine are automatically tak.n into account with this technique. The finite element method is well established technology based on fundamentals of physical laws, k.nematics and material laws. With this technique, no empirical ‘‘scaling" or fitting computer output by input data ‘‘adjustment" to mine measurements is necessary. Capability is demonstrated for doing practical whole-mine subsidence analysis from first principles. Mine-induced seismicity is shown to correlate well with face advance and element failure.

关键词： Whole mine subsidence Multi-scale Finite element analysis Mine induced seismicity

Industrial water treatment and industrial marine outfalls： Achieving the right balance

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Frontiers of Chemical Science and Engineering 2016年第4期10卷 472-479页

作者： Adrian W. k. Law Chunyan Tang Environmental Process Modelling Centre Nanyang Environment and Water Research Institute Nanyang Technological University Singapore 637141 Singapore School of Civil and Environmental Engineering Nanyang Technological University Singapore 639798 Singapore

Industrial water treatment and industrial marine outfalls both function together to reduce the pollutant concentrations in the effluent and mitigate the potential impact on the environment. The former uses environ- mental treatment technology with energy and material cost considerations, while the latter utilizes the natural assimilation potential of the coastal water environment achievable at the outfall location. Because of their synergistic nature, marine outfalls are now commonly used for the disposal of partially treated domestic and industrial effluents in many coastal cities around the world, with many successful examples of low and acceptable risk. to the environment. The objective of this paper is to review their balance from both environmental and economic considerations. We also discuss the end-of-the-pipe and mixing zone approaches for industrial effluents, and give some recommendations particularly for developing coun- tries. Finally, we emphasize that a compulsory and vigorous monitoring program is essential regardless of how the balance is achieved.

关键词： industrial effluent treatment industrial marineoutfalls economic and environmental considerations

Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal generator

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Frontiers in Energy 2016年第4期10卷 424-440页

作者： B. VIDHYA k. N. SRINIVAS 1. Department of Electrical and Electronics Engineering B. S. Abdur Rahman University Chennai 600048 India

This paper presents the simulation of major mechanical properties of a flux reversal generator （FRG） viz., computational fluid dynamic （CFD）, thermal, and vibration. A three-dimensional finite element analysis （FEA） based CFD technique for finding the spread of pressure and air velocity in air regions of the FRG is described. The results of CFD are mainly obtained to fine tune the thermal analysis. Thus, in this focus, a flow analysis assisted thermal analysis is presented to predict the steady state temperature distribution inside FRG. The heat transfer coefficient of all the heat producing inner walls of the machine are evaluated from CFD analysis, which forms the main factor for the prediction of accurate heat distribution. The vibration analysis is illustrated. Major vibration sources such as mechanical, magnetic and applied loads are covered elaborately which consists of a 3D modal analysis to find the natural frequency ofFRG, a 3D static stress analysis to predict the deformation of the stator, rotor and shaft for different speeds, and an unbalanced rotor harmonic analysis to find eccentricity of rotor to mak. sure that the vibration of the rotor is within the acceptable limits. Harmonic analysis such as sine sweep analysis to identify the range of speeds causing high vibrations and steady state vibration at a mode frequency of 1500 Hz is presented. The vibration analysis investi- gates the vibration of the FRG as a whole, which forms the contribution of this paper in the FRG literature.

关键词： flux reversal generator air velocity computa-tion fluid dynamics thermal analysis vibration analysis,finite element analysis

Three-dimensional simulation for problem of penetrative convection near the maximum density

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Journal of Hydrodynamics 2015年第2期27卷 292-303页

作者： HARFASH Ak.l J. ALSHARA Ahmed k. Department of Mathematics College of SciencesUniversity of Basrah Petroleum Department College of EngineeringUniversity of Misan

The problem of penetrative convection with the cubic and fifth-order equations of state proposed by Merk.r, Waas and Grigull is studied. Both linear instability and nonlinear stability analyses are performed to assess the suitability of linear theory to predict destabilisation of the convection. The validity of both the linear instability and global nonlinear energy stability thresholds are tested using three-dimensional simulation. The results show that the linear threshold accurately predicts the onset of instability in the basic steady state solution.

关键词： thermal convection linear instability nonlinear stability finite difference scheme

The role of crystal lattice free volume in nitramine detonation

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Defence Technology（防务技术） 2019年第4期15卷 519-525页

作者： Svatopluk.Zeman Ning Liu Ahmed k. Hussein Institute of Energetic Materials Faculty of Chemical Technology University of Pardubice CZ-532 10 Pardubice Czech Republic Xi'an Modern Chemistry Research Institute Xi'an Shaanxi 710065 China Military Technical College Kobry Elkobbah Cairo Egypt

Crystal lattice free volumes,△V,of 22 nitramines introduced into relationships of maximal theoretical crystal densities(TMD),detonation velocities(D)and volume heats of explosives(ρ.Q).Values of all these characteristics increase with an increase in the AV ***,more realistic dependencies for the TMD and D values are obtained by using correlations with ratio of the intrinsic molecular volume,Vint,to△V(***/△V),whereby the dependence on the D values reflects their similar relationship to a sum of the positive(VS,max)and negative(VS,min)extremes of the molecular surface electrostatic potentials(VS,∑).Also,directly proportional linear relationships are specified between the VS,∑ values on the one hand,and the △V and Vint/△V values,on the *** is stated that the crystal lattice free volumes might have a similar role in detonation of nitramines as the intermolecular force effect in their molecular crystals(they are as if representative of such forces).

关键词： Crystal lattice Detonation Initiation reactivity Nitramines

Magnetotelluric investigation of lithospheric electrical structure beneath the Dharwar Craton in south India:Evidence for mantle suture and plume-continental interaction

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Geoscience Frontiers 2019年第5期10卷 1915-1930页

作者： D. Malleswari k. Veeraswamy k.k. Abdul Azeez A.k. Gupta Narendra Babu Prasanta k. Patro T. Harinarayana MT Group CSIR - National Geophysical Research InstituteHyderabadIndia Crescent Institute of Science and Technology ChennaiIndia

Broad-band and long period magnetotelluric measurements made at 63 locations along -500 k. long Chik.agalur-k.vali profile,that cut across the Dharwar craton (DC) and Eastern Ghat Mobile Belt (EGMB) in south India,is modelled to examine the lithosphere architecture of the cratonic domain and define tectonic *** 2-D resistivity model shows moderately conductive features that intersperse a highly resistive back.round of crystalline rock. and spatially connect to the exposed schist belts or granitic intrusions in the *** features are therefore interpreted as images of fossil pathways of the volcanic emplacements associated with the greenstone belt and granite suite formation exposed in the region.A near vertical conductive feature in the upper mantle under the Chitradurga Shear Zone represents the Archean suture between the western and eastern block. of *** thick.(-200 k.) cratonic (highly resistive) lithosphere is preserved,significant part of the cratonic lithosphere below the western DC is modified due to plume-continental lithosphere interactions during the CretaceouseTertiary period.A west-verging moderately conductive feature imaged beneath EGMB lithosphere is interpreted as the remnant of the Proterozoic collision process between the Indian land mass and East *** (-120 k.) lithosphere is seen below the EGMB,which form the exterior margin of the India shield subsequent to its separation from East Antarctica through rifting and opening of the Indian Ocean in the Cretaceous.

关键词： Magnetotelluric Lithospheric structure Mantle plume Mantle suture Dharwar craton

Mineralogy and textural impact on beneficiation of goethitic ore

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International Journal of Mining Science and Technology 2017年第3期27卷 445-450页

作者： Dey Shobhana Mohanta Manoj k. Singh Ratnak.r Mineral Processing Division CSIR-National Metallurgical Laboratory Jamshedpur 831007 India

The effect of mineralogy and texture on the beneficiation of goethitic ores from two different origins is highlighted. Sample A having 54.47% Fe with 8.57% loss of ignition （LOl） indicates the presence of vitreous and ochreous goethite, martite and microplaty hematite as the major minerals. Sample B contains 56.90% Fe with 14.4% LOI. There is a pisolithic laterite containing vitreous and ochreous goethite, quartz, k.olinitic clay and there is no hematite mineral. The liberated minerals in -150 ＋ 100 μm size class are 74% for Sample A and 37% only for Sample B which shows that the Sample A appears to be more amenable to beneficiate. A concentrate of 46.7% with 63.22% Fe could be recovered from Sample A while subjected to gravity separation followed by wet magnetic separation. The Sample B does not respond to gravity and magnetic separation due to its complex mineralogy. However, calcination of the Sample B followed by magnetic separation gives the encouraging results. Thus, anomalous behaviour of the goethite dominated ores in beneficiation is attributed to the different textural and liberation characteristic.

关键词： Texture Pisolitic Ochreous goethite Vitreous goethite Calcination