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theoretical study of differential cross sections for the ionization of helium by fast proton impact

Chinese Physics B 2024年第11期33卷 255-264页

作者： M Mondal B Mandal t mistry D Jana M Purkait Department of Physics Ramakrishna Mission Residential CollegeNarendrapurKolkata-700103India

We present the angular distribution of the ejected electron for single ionization of He by fast proton impact.A fourbody formalism of the three-Coulomb wave is applied to calculate the triple differential cross sections at several impact energies in the scattering,perpendicular and azimuthal ***,the three-body formalism of three-Coulomb,two-Coulomb and first Born approximation models has also been used to study the many-body effect on electron emission and the validity of the *** the three-Coulomb wave model,the final state wave function incorporates distortion due to the three-body mutual Coulombic *** this formalism,we use an uncorrelated and correlated Born initial state,which consists of a plane wave for the incoming projectile times a two-electron bound state wavefunction of the helium atom representing the 1s2(1S)***,in the case of the three-body formalism,the initial state wavefunction consists of a long-range Coulomb distortion for the incoming projectile and one active electron of the He atom described by the Roothaan–Hartree–Fock *** structure with a single or two peaks with unequal intensity is observed in the angular distributions of the triple differential cross sections for the different kinematic *** addition,the influence of static electron correlations is investigated using different bound state wavefunctions for the ground state of the He *** the four-body formalism,the present computations are very fast by reducing a nine-dimensional integral to a two-dimensional real *** the simplicity and speed of the proposed quadrature,the comparison shows that the obtained results are in reasonable agreement with the experiment and are compatible with those of other theories.

关键词： ionization cross sections collision atoms ions

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二氧化碳氧化丙烷制丙烯的热力学分析

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石油与天然气化工 2002年第1期31卷 5-7页

作者：上官荣昌葛欣王健锋沈俭一江苏淮阴师范学院化学系南京大学化学系

对丙烷直接脱氢和用二氧化碳氧化丙烷脱氢制丙烯过程进行了热力学计算 ,计算结果表明 :在相同的反应条件下 ,二氧化碳氧化丙烷脱氢比丙烷直接脱氢有更高的C3 H8平衡转化率 ,且C3 H8平衡转化率随温度的增加呈单调升高 ,减小反应体系的压... 详细信息

对丙烷直接脱氢和用二氧化碳氧化丙烷脱氢制丙烯过程进行了热力学计算 ,计算结果表明 :在相同的反应条件下 ,二氧化碳氧化丙烷脱氢比丙烷直接脱氢有更高的C3 H8平衡转化率 ,且C3 H8平衡转化率随温度的增加呈单调升高 ,减小反应体系的压力、增大反应气中C0 2 /C3 H8(mol)比值 ,对提高C3

关键词：二氧化碳氧化丙烷丙烯热力学分析制备脱氢

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Development of yield forecast model using multiple regression analysis and impact of climatic parameters on spring wheat

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International Journal of Agricultural and Biological Engineering 2019年第4期12卷 110-115页

作者： Purbasha mistry Ganesh Bora Natural Resources Management North Dakota State UniversityFargoND 58102USA Agricultural and Biological Engineering Department Mississippi State UniversityStarkvilleMS 39762USA

Understanding the impacts of climate change in agriculture is important to ensure optimal and continuous crop *** agricultural sector plays a significant role in the economy of Upper Midwestern states in the USA,especially that of North Dakota(ND).Spring wheat contributes most of the wheat production in ND,which is a major producer of wheat in the *** study focuses on assessing possible impacts of three climate variables on spring wheat yield in ND by building a regression ***-five years of field data were collected and the trend of average minimum temperature along with average maximum temperature,average precipitation,and spring wheat yield was analyzed using Mann-Kendall *** study area was divided into 9 divisions based on physical *** minimum temperature plays an important role in the region as it impacts the physiological development of the *** trend was noticed for 6 divisions for average minimum temperature and average precipitation during growing *** and Southeast division showed the strongest increasing trend for average minimum temperature and average precipitation,***-central division had the most decreasing trend for average maximum temperature.A significant relationship was established between spring wheat yield and climatic parameters as the p-value is lower than 0.05 level which rejects the null *** regression model was tested for forecasting *** percentage deviation of error for the model is approximately±30%in most of the years.

关键词： yield forecast modelling multiple regression climatic parameters spring wheat

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Understanding of tip clearance flow structure in high speed mixed flow compressor

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Propulsion and Power Research 2023年第3期12卷 356-379页

作者： Hemant Kumar Chetan S.mistry Department of Aerospace Engineering Indian Institute of TechnologyKharagpurWest Bengal 721302India

this paper addresses the necessity to make a physical interpretation of a highly complex three-dimensional tip clearance flow field study for high-speed mixed-flow compressor having stage exit static pressure to inlet total pressure ratio of 3.8 with 39,836 rpm rotor *** four different tip configurations namely the constant(l Z 0.016 and 0.019)and variable(l Z 0.011(inlet)-0.019(exit)and 0.019(inlet)-0.022(exit))tip clearances were numerically analysed using available experimental *** numerical investigation reveals that in contrast to the classic jet-wake pattern,two anomalous velocity profiles formed at the impeller exit which results in pressure losses in the vaneless *** the impeller inlet,the tip leakage flow rolls up to discrete tip leakage vortex structure for each tip clearance *** results in the formation of a region of momentum deficit,recirculation zone,which gets weakened as it moves *** tip clearance configuration is observed to profoundly influence the extent and vorticity of the tip leakage *** the splitter blade passage,the tip leakage flow and Coriolis flow interact with passage flow,resulting in the formation of two secondary passage vortices that move downstream along the pressure and suction surface of the splitter *** tip clearance configuration directly influences the impeller exit jetwake pattern by modulating the secondary passage vortices trajectory and ***,off-design analysis for tip clearances l Z 0.016 and l Z 0.019,depict distinctive tip leakage vortex *** operating near the stall conditions(80%of design mass flow rate),l Z 0.019 exhibits bubble shape tip leakage vortex breakdown occurring near the impeller *** result in a substantial change in the tip leakage vortex nature;expansion of the recirculation zone and early weakening of the vorticity in the tip leakage *** is observed that vortex breakdown plays a vital role in characte

关键词： Recirculation zone Vortex breakdown tip leakage flow Mixed-flow compressor Jet-wake flow Vaned-diffuser

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Protective effect of Sida cordata leaf extract against CCl_4 induced acute liver toxicity in rats

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Asian Pacific Journal of tropical Medicine 2013年第4期6卷 280-284页

作者： Sunil mistry KR Dutt J Jena Gayatri College of Pharmacy Gayatri ViharSambalpurOrissa-768200India CMR College of Pharmacy KandlakoyaMedchan RoadHyderabad-501401India Department of Pharmacology VSS Medical CollegeSambalpur University

Objective:to investigate the hepatoprotective potential of Sida cordata（Malvaceae）（***） in experimental rats to validate its traditional ***:Wister albino rats were divided into 6 groups:Croup 1 served as control;CroupⅡserved as hepatotoxic（CCl4 treated） group; CroupⅢ,Ⅳand V served as（100,200 and 400 mg/kg b.w.） *** leaf extract（SCLE） treated groups;CroupⅥserved as positive control（Silymarin） treated *** marker enzymes serum glutamate oxyloacetic transaminase,serum glutamic pyruvic transaminase,pancreatic enzymatic antioxidants superoxide dismutase（SOD）,lipid peroxidation,catalase（CAt）,reduced glutathione（CSH） were measured and compared along with histopathological ***: Obtained results show that the treatment with SCI.E significantly（P<0.05-<0.001） and dosedependently reduced CCl4 induced elevated serum level of hepatic ***, SCLE significantly（up to P<0.001） reduced the lipid peroxidation in the liver tissue and restored activities of defence antioxidant enzymes CSH,SOD and CAt towards normal levels,which was confirmed by the histopathological ***:the results of this study strongly indicate the protective effect of SCLE against CCl4 induced acute liver toxicity in rats and thereby scientifically support its traditional use.

关键词： Sida cordata Histopathology Hepatoprotective CCl_4

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Interactions Between temperature and Sugars in the Regulation of Leaf Senescence in the Perennial Herb Arabis alpina L.

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Journal of Integrative Plant Biology 2012年第8期54卷 595-605页

作者： Astrid Wingler Emma Josefine Stangberg triambak Saxena Rupal mistry Research Department of Genetics Evolution and EnvironmentUniversity College LondonGower StreetLondon WC1E 6BTUnited Kingdom

Annual plants usually flower and set seed once before senescence results in the death of the whole plant （monocarpic senescence）. Leaf senescence also occurs in polycarpic perennials; even in ＂evergreen＂ species individual leaves senesce. In the annual model Arabidopsis thaliana sugars accumulate in the senescent leaves and senescence is accelerated by high sugar availability. Similar to A. thaliana, sugar contents increased with leaf age in the perennial Arabis alpina grown under warm conditions （22℃ day/18 night）. At 5℃, sugar contents in non-senescent leaves were higher than at a warm temperature, but dependent on the accession, either sugars did not accumulate or their contents decreased in old leaves. In A. alpina plants grown in their natural habitat in the Alps, sugar contents declined with leaf age. Growth at a cold temperature slightly delayed senescence in A. alpina. In both warm and cold conditions, an external glucose supply accelerated senescence, but natural variation was found in this response. In conclusion, sugar accumulation under warm conditions could accelerate leaf senescence in A. alpina plants, but genotype-specific responses and interactions with growth temperature are likely to influence senescence under natural conditions.

关键词： Perennial polycarpic senescence sugar signaling.

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tSKARNA-norm Adaption Based NLMS with Optimized Fractional Order PID Controller Gains for Voltage Power Quality

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Chinese Journal of Electrical Engineering 2023年第3期9卷 84-98页

作者： Prashant Kumar Sabha Raj Arya Khyati D.mistry Department of Electrical Engineering Sardar Vallabhbhai National Institute of TechnologySurat 395007India

the operation of a dynamic voltage restorer(DVR)is studied using a three-phase voltage source converter(VSC)-based topology to alleviate voltage anomalies from a polluted supply *** control algorithm used included two *** first is an adaptive takagi-Sugeno-Kang(tSK)-based adaptive reweighted L1 norm adaption-based normalized least mean square(tSK-ARNA-NLMS)unit,which is proposed for the extraction of fundamental active and reactive components from the non-ideal supply and is further employed to generate the load reference voltage and switching pulse for the *** step size was evaluated using the proposed tSK-ARNA-NLMS controller,and the tSK unit was optimized by integration with the marine predator algorithm(MPA)for a faster convergence *** second,a fractional-order PID controller(FOPID),was employed for AC-and DC-link voltage regulation and was approximated using the Oustaloup *** FOPID()PI Dγμprovides more freedom for tuning the settling time,rise time,and *** FOPID coefficients(Ki,Kd,Kp,γ,andμ)were optimized by employing an advanced ant lion optimization(ALO)meta-heuristics technique to minimize the performance index,namely,the integral time absolute error(ItAE)and assess the accuracy of *** DVR performance was validated under dynamic-and steady-state conditions.

关键词： takagi-Sugeno-Kang(tSK) ARNA-NLMS FOPID-ALO unbalances gain optimization approximation Oustaloup technique

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transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

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Experimental investigation of a high aspect ratio,low speed contra-rotating fan stage with complex inflow distortion

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Propulsion and Power Research 2014年第2期3卷 68-81页

作者： Chetan mistry A.M.Pradeepn Department of Aerospace Engineering Indian Institute of TechnologyBombayMaharashtra 400076India

this paper focuses on the response of a high aspect ratio,low speed contra-rotating fan with complex inflow *** total pressure at the inlet is artificially distorted by means of two different sets of screens with different porosities to generate a hub-strong complex distortion and a tip-strong complex *** flow analyses were conducted for the design speed of rotor-1 in combination with off design speeds of rotor-2 both for the design and the peak pressure mass flow *** order to understand the extent of inlet distortion,the distortion sector was rotated circumferentially at intervals of 151 to cover the entire *** measurements of total pressure,static pressure,velocity components and flow angles were carried out at the inlet of the first rotor,between the two rotors and at the exit of the second rotor using three seven hole *** study reveals a few interesting aspects on the effect of complex inflow distortion on the flow behavior of a contra-rotating *** presence of a low porosity screen reduces the magnitude of axial velocity and generates higher spread of distortion near the localized region of placement of the *** hub-strong complex distortion has a greater effect of presence of this low porosity screen in both circumferential and radial *** leads to higher stagnation pressure variation at the *** the other hand,for the tip-strong complex distortion case,the extent of distortion is observed to be higher in the circumferential direction towards the casing rather than *** localized improvement in the flow(in tip-strong inflow distortion)near the tip region improves the performance both in terms of pressure rise and efficiency of stage compared to hub–strong complex distortion.

关键词： Complex inflow distortion Hub-strong complex distortion tip-strong complex distortion Contra-rotating fan

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Image processing analysis to track colour changes on apple and correlate to moisture content in drying stages

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Food Quality and Safety 2018年第2期2卷 105-110页

作者： Ganesh C.Bora Rohit Pathak Mojtaba Ahmadi Purbasha mistry Department of Agricultural and Biological Engineering Mississippi State UniversityMississippiUSA Department of Agricultural and Biosystems Engineering North Dakota State UniversityFargoNorth DakotaUSA

Colour and moisture content are two most important attributes of the commercial food *** of moisture content is very important to know the storability of the food *** also relates to the process of drying in a fruit or *** drying and shrinkage deteriorates the quality of food *** goal of the experiment was to examine the changes in RGB values of an apple during drying at different *** this study,emphasis was given on how the colour changes when there is a significant change in the moisture content of the *** randomly chosen varieties of apples were sliced to 8 mm thickness and dried in vacuum oven at 60°C,70°C,and 80°*** loss of moisture was recorded for every 30 min interval and corresponding digital images were taken to determine the change in RGB *** images that were captured during the study was analysed in MAtLAB image analysis computer *** analysis of moisture content and average colour share with respect to time showed that average colour share value decreases with time at all three *** than 50 per cent of variation in moisture content was explained by average colour *** is a significant linear relationship between moisture content and colour changes in RGB and can be used to predict the moisture content of apple during drying process.

关键词： image processing colour moisture content apple drying temperature

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