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High-precision inverse potentials for neutron-proton scattering using piece-wise smooth Morse functions

Chinese Physics C 2024年第10期48卷 201-213页

作者： Ayushi Awasthi Arushi sharma Ishwar kant o.s.k.s.sastri Department of Physics and Astronomical science Central University of Himachal PradeshDharmshala176215India

The aim of this study is to construct inverse potentials for various ℓ-channels of neutron-proton scattering using a piece-wise smooth Morse function as a *** phase equations for single-channel states and the coupled equations of multi-channel scattering are solved numerically using the 5^(th) order Runge-kutta *** employ a piece-wise smooth reference potential comprising three Morse functions as the initial *** a machine learning-based genetic algorithm,we optimize the model parameters to minimize the mean-squared error between simulated and anticipated phase *** approach yields inverse potentials for both single and multichannel scattering,achieving convergence to a mean-squared error≤10^(-3).The resulting scattering lengths"a_(0)"and effective ranges"r"for ^(3)s_(1) and ^(1)s_(0) states,expressed as[a_(0),r],are found to be[5.445(5.424),1.770(1.760)]and[–23.741(–23.749),2.63(2.81)],respectively;these values are in excellent agreement with experimental ***,the calculated total scattering cross-sections are highly consistent with their experimental counterparts,having a percentage error of less than 1%.This computational approach can be easily extended to obtain interaction potentials for charged particle scattering.

关键词： inverse potentials neutron-proton scattering piece-wise smooth Morse function phase function method reference potential approach genetic algorithm

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Experimental Investigations of the Three-DimensionalFlow in a Large Deflection Turbine Cascade with Tip Clearance

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Journal of Thermal science 1998年第3期7卷 149-164页

作者： M.Govardhan s.s.s.R.k.sastri V.s.Vishnubhotla ThermalurbomachinesLab DepartmentofMechanicalEngineeringIndianInstituteofTechnologyMadrasChennai600036IndiaThermalurbomachinesLabDepartmentofMechanicalEngineeringIndianInstituteofTechnologyMadrasChennai600036IndiaThermalurbomachinesLabDepartment

Results obtained from an experbontal study of the threedimensional flow survey within and exit of a large defiection linear turbine cascade are presented for a tip clearance levels of 0.08, 1.5, 3.0 percent of chord and compared with the help of boundary layer probes and that within and exit of a blade passage was done with a miniaturised five hole probe. End wall and blade tip surface static pressures were also obtained, in addition to flow visualisation studies. A strong horse-shoe vortex forms in front of the leading edge for zero clearance whereas this vortex does not appear for 3 percent clearance indicating that for large clearance the pressure forces have dominating infiuence than the viscous forces. In addition to normally known clearance vortex, a small tip separation vortex was noticed on the blade tip surface inside the tip gap. Due to the area contraction caused by the tip separation vortex, the fluid movign towards the tip gap from the pressure side is accelerated. Downstream of the vortex, the endwall pressure increases due to flow mixing. Both vortices increase in size and strength along the chord. The miring is incomplete in the aft portion of the blade. The tip gap velocity profiles exhibit wak like characteristics especially at axial positions where the mixing is incomplete. The passage vortex in the present investigations did not diminish with increase in clearance. The discharge coefhcient and the total pressure loss coefficient within the tip gap show similar tendency with lower values near the leading and trailing edge regions.

关键词： turbine cascade tip clearance vortex tip separation vortex horse-shoe vor-tex total pressure loss coefficient discharge coefficient

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Beneficiation of coal using supercritical water and carbon dioxide extraction:sulfur removal

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International Journal of Coal science & Technology 2021年第4期8卷 717-726页

作者： Matthew J.DeCuir Ram B.Gupta Bhima sastri Department of Chemical and Life science Engineering Virginia Commonwealth UniversityRichmondVA 23284-3068USA office of Fossil Energy U.S.Department of Energy19901 Germantown RoadGermantownMD 20874-1290USA

This work explores the use of carbon dioxide,water,and their mixtures as solvent for the precombustion beneficiation of raw coal without using any toxic mineral acids in the temperature range of 200-400℃.The fluid polarity,ionic constant,and supercritical point can be adjusted by H_(2)o/Co_(2)ratio and *** carbon dioxide to hydrothermal fluid also increases the ionization by forming carbonic *** with supercritical fluids have several benefits including enhanced mass transport,ease of separation and recycle,wide range of extractive capability and tunability,better inherent safety,and in the case of carbon dioxide and water-low cost.A semi-continuous extraction system was designed and built in which pressure,temperature and the relative flow rates of Co_(2)and H_(2)o can be *** powder is kept in a packed bed and the extraction is carried out at 143 bar *** sulfur as a model heteroatom,extractive efficiency is examined as a function of the temperature,fluid composition,fluid flow,and extraction *** results indicate that carbon dioxide,water,and supercritical water-carbon dioxide(scWC)all can effectively extract about 50%of total sulfur from bituminous coal in 1 *** above 350℃decreased effectiveness,and extraction above the supercritical point of pure water caused hydrothermal *** extraction may provide necessary control to prevent organic dissolution while removing sulfur.

关键词： Coal supercritical sulfur Beneficiation Cleaning Extraction

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WEATHER BAsED FoREWARNING sYsTEM FoR RICE PEsTs （GALL MIDGE AND YELLoW sTEM BoRER ） INCIDENCE IN CHHATTIsGARH oF EAsTERN INDIA

WEATHER BASED FOREWARNING SYSTEM FOR RICE PESTS （GALL MIDGE...

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The ⅩⅤth International Plant Protection Congress

作者： A.s.R.A.s.sastri R.N.GANGULY Dept.of Agricultural Meteorology Indira Gandhi Agricultural University Raipur （CG） 492 006 India Dept.of Entomology Indira Gandhi Agricultural University Raipur （CG） 492 006 India

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No Longer Invincible： Women＇s Role in Promoting Ubud as Culinary Destination in Bali

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Journal of Tourism and Hospitality Management 2016年第3期4卷 114-122页

作者： Putu Diah sastri Pitanatri sekolah Tinggi Pariwisata Nusa Dua Bali Indonesia

The development of cultural tourism in Ubud has contributed to the rise of its image as a culinary destination. surprisingly, the ascent of this new image was mainly reinforced by women＇s role in practicing local culinary entrepreneurship. Even it is acknowledged that culture is a dynamic entity, Balinese women get very rare exposure in the culinary world as it is commonly known mastered by men. on the other hand, culinary tourism has now taken a major part in many tourist destinations. As an emerging trend, culinary tourism faces the fears the world is surrendering to： McDonaldization and cultural homogenization. With this emerging trend, Ubud＇s cooking culture and tastes own a major potential in promoting the destination. However, as a part of culture local culinary in Ubud is rarely being studied or visible to the academic literatures. Becoming fertile terrain for researches that explore the discipline of cultural tourism, very little research also has been carried out into gender dimension in culinary tourism in Ubud. This paper is a first attempt to unpack women＇s role in promoting Ubud＇s image as an emerging culinary destination. Using qualitative method, the paper explores women who have not only succeeded in lifting local culinary as traveller＇s preferences but also in opening up job opportunities in rural areas. The data presented in this article were collected through observation and in-depth interviews of four leading Ubud women who have run successful local culinary outlets or restaurants offering local dishes. The four women surveyed are the owner of kedewatan Chicken Rice （Nasi Ayam kedewatan） Ibu Mangku, the owner of the infamous suckling pig in Ubud Ibu oka, the owner of Bebek Bengil Agung Raka suenl, and the owner of Paon Bali cooking class Ibu Puspawati. Combining literature reviews and data obtained through observation and in-depth interviews, this paper aims to provide an overview of the potential of culinary tourism to contribute to the gender e