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calculation of Excited States of He Atoms in a Strong Magnetic Field

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communications in Theoretical Physics 2012年第6期57卷 1059-1065页

作者：赵力波 B.c.Saha 杜孟利 Department of Physics Florida A&M UniversityTallahasseeFlorida 32307USA Institute of Theoretical Physics Chinese Academy of SciencesP.O.Box 2735

A recently developed B-spline algorithm is extended and utilized to calculate excited states of He atoms in the presence of strong magnetic *** energies are presented for He in the five excited atomic states 210-+,110-,210-,11(-1)+,and 2 1(1) + with magnetic field strength ranging from 0.0001 to 10 *** obtained energies are compared with available theoretical data,and found to be in good *** investigate influence of magnetic fields on atomic structures of multielectron atoms,and illustrate that how electron probability density distributions change with increasing magnetic field *** current approach is directly applicable to simulations of discrete spectra for He atoms in the atmospheres of magnetized white dwarf stars.

关键词： He atom magnetic field B-spline basis

Review of research and application of evaporative cooling in preservation of fresh agricultural produce

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International Journal of Agricultural and Biological Engineering 2014年第5期7卷 85-102页

作者： M.c.Ndukwu S.I.Manuwa Department of Agricultural and Bio-resources Engineering Michael Okpara University of AgricultureUmudike Umuahia Abia StateNigeria Department of Agricultural Engineering Federal University of Technology AkureP.M.B.704 AkureOndo StateNigeria

Extensive review of evaporative coolers for the preservation of fresh agricultural produce in some countries was *** of the designs employ mainly direct evaporative cooling methods which are simple but with lower thermal performance,and can only be used for short term storage of agricultural produce with moderate respiratory *** into novel technologies in evaporative cooling systems which can improve the cooling performances,such as membrane air treatments,dew point type and heat pipe type heat exchanger in indirect/direct evaporative cooling application,and their feasibilities in agricultural storage are either absent or *** kinds of materials especially agricultural residues have been used for air water contact in evaporative cooling in different climates,but most of the analyses focused on effect of air flow rate and pad thickness on the cooling effectiveness,and the energy efficiency and evaporation loss of these materials in most cases were not evaluated or *** paper highlights the prospects and constraints of commercialization and marketing of evaporative coolers in some developing countries,and the general weakness in researches and the ways forward in new area of research and development are concluded.

关键词： agricultural products evaporative cooling passive coolers active coolers pad materials

Assessment of porous aquifer hydrogeological parameters using automated groundwater level measurements in Greece

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Journal of Groundwater Science and Engineering 2021年第4期9卷 269-278页

作者： Marios c Kirlas School of Agriculture Faculty of AgricultureForestry and Natural EnvironmentAristotle University of ThessalonikiUniversity campusThessaloniki 54124Greece.

In this paper,the hydrogeological parameters of a confined aquifer,such as transmissivity(T),storativity(S)and radius of influence(R),have been assessed using real groundwater level measurements recorded by a monitoring network,consisting of automated municipal water supply boreholes at Nea Moudania aquifer,chalkidiki,***,the paper focused on the correlation between the drawdown and the constant flow rate during pumping *** the cooper-Jacob and the recovery test method were applied in order to delineate if turbulent head losses occur,as well as the impact of incorrect measurements of the radial distance(r)in the accuracy of estimating S *** results show that a)the occurrence of a linear correlation between s and Q indicates a negligible turbulent head loss in the pumping wells and thus a reasonable flow rate usage,b)the validity of storativity values could be compromised if the r value is not accurately measured,and c)recovery test method can be used as an indicator of residual drawdown(s’)caused by previous pumping cycles,when the straight line intersecting the logarithmic t/t’axis has a value greater than 1.

关键词： cooper-Jacob method Greece Recovery test method Storativity Transmissivity

A Metric Approach to Hot Topics in Biomedicine via Keyword co-occurrence

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Journal of Data and Information Science 2019年第4期4卷 13-25页

作者： Jane H.Qin Jean J.Wang Fred y.ye Jiangsu Key Laboratory of Data Engineering and Knowledge Service School of Information ManagementNanjing UniversityNanjing 210023China International Joint Informatics Laboratory(IJIL) Nanjing University-University of IllinoisNanjing-ChampaignChina-USA

Purpose:To reveal the research hotpots and relationship among three research hot topics in b iomedicine,namely cRISPR,iPS(induced Pluripotent Stem)cell and Synthetic ***/methodology/approach:We set up their keyword co-occurrence networks with using three indicators and information visualization for metric ***:The results reveal the main research hotspots in the three topics are different,but the overlapping keywords in the three topics indicate that they are mutually integrated and interacted each *** limitations:All analyses use keywords,without any other *** implications:We try to find the information distribution and structure of these three hot topics for revealing their research status and interactions,and for promoting biomedical ***/value:We chose the core keywords in three research hot topics in biomedicine by using h-index.

关键词： Keyword co-occurrence Network analysis Information visualization Biomedicine Hot topics cRISPR-cas iPS cell Synthetic biology

How does transmembrane electrochemical potential drive the rotation of Fo motor in an ATP synthase？

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Protein & cell 2015年第11期6卷 784-791页

作者： Xuejun c. Zhang Min Liu yan Zhao National Laboratory of Macromolecules National Center of Protein Science-Beijing Institute of Biophysics Chinese Academyof Sciences Beijing 100101 China

ATP synthesis via Fi/Fo-like ATP synthases is a universal energy An essential step of this process is to Utilize the free energy of the transmembrane electrochemical potential of cations, such as protons or sodium ion... 详细信息

关键词： synthase research history filled landmark discoveries

WIPER: Weighted in-Path Edge Ranking for biomolecular association networks

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Quantitative Biology 2019年第4期7卷 313-326页

作者： Zongliang yue Thanh Nguyen Eric Zhang Jianyi Zhang Jake y.chen Informatics Institute School of MedicineUniversity of AlabamaBirminghamAL 35233USA Department of Biomedical Engineering University of AlabamaBirminghamAL 35233USA Department of computer Science University of AlabamaBirminghamAL 35233USA

Background:In network biology researchers generate biomolecular networks with candidate genes or proteins experimentally-derived from high-throughput data and known biomolecular *** bioinformatics research focuses on characterizing candidate genes/proteins,or nodes,with network characteristics,e.g.,betweenness ***,there have been few research reports to characterize and prioritize biomolecular associations("edges"),which can represent gene regulatory events essential to biological ***:We developed Weighted In-Path Edge Ranking(WIPER),a new computational algorithm which can help evaluate all biomolecular interactions/associations("edges")in a network model and generate a rank order of every edge based on their in-path traversal scores and statistical significance test *** validate whether WIPER worked as we designed,we tested the algorithm on synthetic network ***:Our results showed WIPER can reliably discover both critical"well traversed in-path edges",which are statistically more traversed than normal edges,and"peripheral in-path edges",which are less traversed than normal *** with other simple measures such as betweenness centrality,WIPER provides better biological *** the case study of analyzing postanal pig hearts gene expression,WIPER highlighted new signaling pathways suggestive of cardiomyocyte regeneration and *** the case study of Alzheimer's disease genetic disorder association,WIPER reports SRc:APP,AR:APP,APP:FyN,and APP:NES edges(gene-gene associations)both statistically and biologically important from PubMed ***:We believe that WIPER will become an essential software tool to help biologists discover and validate essential signaling/regulatory events from high-throughput biology data in the context of biological ***:The free WIPER API is described at the website(***/wiper/).

关键词： networks network molecular

Preliminary Study on corrosion Behaviour of carbon Steel in Oil–Water Two-Phase Fluids

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Journal of Materials Science & Technology 2015年第12期31卷 1274-1281页

作者： Z.y.Hu D.L.Duan S.H.Hou X.J.Ding S.Li Institute of Metal Research Chinese Academy of Sciences

The corrosion behavior of type 1045（AISI） carbon steel（cS） in oil-water fluids was investigated by considering the surface wetting state as the breakthrough *** surface water wetting percentage（SWWP）and corrosion weight loss of cS in different oil-water fluids were *** morphology and composition of the corrosion films were detected via scanning electron microscopy,electron-probe facescanning technology and Fourier-transform infrared *** results indicated that the corrosion weight loss of cS in the oil-water fluids corresponded with SWWP and that the corrosion process was influenced by the participation of oil.

关键词： carbon steel corrosion behavior Wetting Fluid flow Fourier transform infrared(FTIR) spectroscopy

Time series analysis of mantle cycles Part Ⅱ:The geologic record in zircons, large igneous provinces and mantle lithosphere

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Geoscience Frontiers 2019年第4期10卷 1327-1336页

作者： Kent c. condie Stephen J. Puetz Department of Earth & Environmental Science New Mexico Institute of Mining and TechnologySocorroNM87801USA Progressive Science Institute HonoluluHI96815USA

Igneous and detrital zircons have six major U/Pb isotopic age peaks in common(2700 Ma,1875 Ma.1045 Ma,625 Ma,265 Ma and 90 Ma).For igneous rocks,each age peak is comprised of subpeaks with distinct geographic distributions and a subpeak age range per age peak≤100 *** are eight major LIP age peaks(found on≥10 crustal provinces)of which only four are in common to major detrital zircon age peaks(2715 Ma,1875 Ma,825 Ma,90 Ma).Of the whole-rock Re depletion ages,58%have correspo nding detrital zircon age peaks and 55%have corresponding LIP age *** age pea ks are fou nd in common to igneous zircon,detrital zircon,LIP,and Re depletion age time series(3225 Ma,2875 Ma,2145 Ma,2085 Ma,1985 Ma,1785 Ma,1455 Ma,1175 Ma,825 Ma,and 90 Ma).and these are very robust peaks on a global scale as recorded in both crustal and mantle *** 50%of the age peaks in each of these time series correspond to predicted peaks in a 94-Myr mantle cycle,including four of the ten peaks in common to all four time series(2875 Ma,1785 Ma,825 Ma and 90 Ma).Age peak widths and subpeak ranges per age peak suggest that mantle events responsible for age peaks areyr and manyyr in *** peak geographic distributions show three populations(≤1000 Ma,2500-1000 Ma,>2500 Ma),with the number of new provinces in which age peaks are represented decreasing with time within each *** breaks between the populations(at 2.5 Ga and 1 Ga)fall near the onsets of two transitions in Earth *** First Transition may represent a change from stagnant-lid tectonics into plate tectonics and the Second Transition,the onset of subduction of continental *** major factor controlling geographic distribution of age peaks is the changing locations of ***^2 Ga,age subpeaks and peaks are housed in orogens within or around the edges of crustal provinces,mostly in accretionary *** beginning at 1.9 Ga,collisional orogens become more *** coincidence in duration

关键词： Isotopic age peaks U/Pb zircon ages Re depletion ages Large igneous provinces Age peak correlation Mantle cycles

THE EFFEcT OF MAGNETIc FIELDS ON LOW FREQUENcy OScILLATING NATURAL cONVEcTION WITH PRESSURE GRADIENT

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Applied Mathematics and Mechanics(English Edition) 2003年第3期24卷 274-283页

作者： G.c.Sharma Madhu Jain Mahesh chandra School of Mathematical Sciences Institute of Basic ScienceSchool of Mathematical SciencesInstitute of Basic ScienceSchool of Mathematical SciencesInstitute of Basic Science KhandariAgra-282002IndiaKhandariAgra-282002IndiaKhandariAgra-282002India

The oscillating natural convection in the presence of transverse magnetic field with time depending pressure gradient is studied. The analysis of the problem is carried out by assuming that the fluid is flowing in a parallel plate configuration. The emphasis is on low frequency oscillating convective flows induced by g-jitter associated with micro gravity because of their importance to the space processing materials. A general solution for an oscillating flow in the presence of transverse magnetic field is carried out. Some special cases of the oscillating flow and its response to an applied magnetic field are performed. It was observed that the behavior of oscillating free convective flows depends on frequency, amplitude of the driving buoyancy forces, temperature gradient,magnetic field and the electric conditions of the channel walls. In the absence of magnetic field, buoyancy force plays a predominant role in driving the oscillatory flow pattern, and velocity magnitude is also affected by temperature gradients. To suppress the oscillating flow external magnetic field can be used. It is also found that the reduction of the velocity is inversely proportional to the square of the applied magnetic field with conducting wall but directly proportional to the inverse of the magnetic field with insulating wall. Detailed calculations and computational results are also carried out to depict the real situation.

关键词： convection g- jitter acceleration buoyancy force magnetic field pressure gradient