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Comprehensive geochemical/hydrochemical and geo-thermometry analysis of Unai geothermal field, Gujarat, India

Acta Geochimica 2019年第1期38卷 145-158页

作者： Manan Shah Anirbid Sircar Nahid Shaikh Karan Patel Darshan Sharma Dwijen Vaidya School of Petroleum Technology Pandit Deendayal Petroleum University wipro limited Centre of Excellence for Geothermal Energy Pandit Deendayal Petroleum University

The knowledge of water temperature produced from a geothermal reservoir and its composition is of utmost importance in designing utilization strategies, the surface production facilities and in selecting the material to be used. Unai hot springs are located in the southern part of Gujarat, India with discharge temperatures varying from 51 to 56 ℃. With the aim of developing Unai as a potential geothermal field and exploiting it in the future, geochemical and geothermometrical study was undertaken. The samples were collected from various Unai geothermal location and analysis of chemical composition of water obtained from different wells was done. The concentration of Silica, carbonate and ions like Na and Cl have been analyzed to delineate the path of water movement in the subsurface and classify the reservoir based on the enthalpy.The ratio of the concentration of ions like Na^+ and K^+ and the relative proportions of various sets of ions were also used to characterize the geothermal reservoir and the reservoir fluid by the use of ternary diagrams. Na–K–Ca,Chalcedony, quartz, and Silica geo-thermometers have been studied. The present study also envisages the importance of graphical representations like Piper diagram,Scholler etc. to determine variation in hydrochemical facies and to understand the evolution of hydrochemical processes in the Unai geothermal field respectively. The study yields the conclusion that the reservoir under consideration is a low enthalpy reservoir with temperature ranging from 60 to 80 ℃.

关键词： Geothermal energy Hydrochemical Geochemical Geothermometery Renewable energy

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Study of residual stresses and distortions from the Ti6Al4V based thinwalled geometries built using LPBF process

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Defence Technology（防务技术） 2023年第10期28卷 33-41页

作者： Jagatheeshkumar S Raguraman M Siva Prasad AVS Nagesha B K Chandrasekhar U Indian Institute of Information Technology Design and Manufacturing KancheepuramChennai 600127India Gas Turbine Research Establishment DRDOBengaluru 560093India wipro3D Bengaluru560058India

The current paper focuses on the prediction of residual stresses and distortions in the Laser Powder Bed Fusion(LPBF)built Ti6Al4V thin-walled geometries using Ansys Additive Print(AAP)software which employs a layer-by-layer accumulation of inherent strain to calculate the deformations.Isotropic and anisotropic strain scaling factors were calibrated initially within the APP software for the Ti6Al4V based single cantilever beam geometry.Subsequently,the numerical simulations were performed in APP software and computed the residual stresses and distortions for the varied process parameters including laser power,scan speed and hatch distance while maintaining the layer thickness constant for all the design iterations.The numerical predictions were compared;they were found to match reasonably well with the XRD measurements within the calibrated regime.

关键词： Ti6Al4V Thin-walled geometry Residual stress Inherent strain XRD Ansys additive print

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传统零售业走向电子商务的新思维

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信息与电脑(理论版) 2011年第17期 78-79页

在信息时代的今天,互联网带来的海量信息与机遇让所有企业都兴奋不已。单纯依靠传统模式来扩张规模的传统零售业也逐步将目光投向电子商务,信息化已成为零售企业不断地调整发展策略的关键所在。其实,早在上世纪80年代,中国零售业已经开...

在信息时代的今天,互联网带来的海量信息与机遇让所有企业都兴奋不已。单纯依靠传统模式来扩张规模的传统零售业也逐步将目光投向电子商务,信息化已成为零售企业不断地调整发展策略的关键所在。其实,早在上世纪80年代,中国零售业已经开始试水电子商务。从最初简单的零售终端管理系统(POS系统),到90年代收款机和基础软件的应用,再到如今成熟全面的信息系统和商业智能化管理,中国的传统零售业一直在电子商务的道路上不断探索。虽然从未停止过尝试的脚步,也

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传统零售业走向电子商务的新思维

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信息与电脑 2011年第9期23卷 78-79页

在信息时代的今天,互联网带来的海量信息与机遇让所有企业都兴奋不已。单纯依靠传统模式来扩张规模的传统零售业也逐步将目光投向电子商务,信息化已成为零售企业不断地调整发展策略的关键所在。

关键词：电子商务零售业传统零售企业信息时代海量信息信息化

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Sympathetic skin response: simple test for evaluation of autonomic function in patients with diabetes mellitus?

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Chinese Medical Journal 2005年第1期118卷 83-83页

作者： Srinivasa Jayachandra Maxim Pinto Urban J A D'Souza Monash Univ Dept Med Biosci Petaling Jaya 46150 Malaysia wipro Technol Bangalore Karnataka India Univ Sains Malaysia Sch Med Sci Dept Physiol Kubang Kerian 16150 Malaysia

To the Editor: We read with interest the excellent article by Huang YN et al.1 This important and carefully conducted study illustrates the sympathetic skin response (SSR) test can detect early dysfunction of the smal... 详细信息

关键词： Diabetic Neuropathies Humans Skin Sympathetic Nervous System

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