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Comparisons of improved genomic predictions generated by different imputation methods for genotyping by sequencing data in livestock populations

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journal of Animal Science and Biotechnology 2020年第2期11卷 316-326页

作者： Xiao Wang Guosheng Su Dan Hao Mogens SandøLund Haja n.Kadarmideen Quantitative Genomics Bioinformatics and Computational Biology GroupDepartment of Applied Mathematics and Computer ScienceTechnical University of DenmarkRichard Peterson PladsBuilding 3242800 Kongens LyngbyDenmark Center for Quantitative Genetics and Genomics Department of Molecular Biology and GeneticsAarhus University8830 TjeleDenmark Department of Molecular Biology and Genetics Aarhus University8000 Aarhus CDenmark College of Animal Science and Technology Northwest A&F UniversityYangling 712100ShannxiChina

Background:Genotyping by sequencing(GBS)still has problems with missing *** is important for using GBS for genomic predictions,especially for low depths,due to the large number of missing *** allele frequency(MAF)is widely used as a marker data editing criteria for genomic *** this study,three imputation methods(Beagle,IMPUTE2 and FImpute software)based on four MAF editing criteria were investigated with regard to imputation accuracy of missing genotypes and accuracy of genomic predictions,based on simulated data of livestock ***:Four MAFs(no MAF limit,MAF≥0.001,MAF≥0.01 and MAF≥0.03)were used for editing marker data before ***,IMPUTE2 and FImpute software were applied to impute the original ***,IMPUTE2 also imputed the expected genotype dosage after genotype correction(GcIM).The reliability of genomic predictions was calculated using GBS and imputed GBS *** results showed that imputation accuracies were the same for the three imputation methods,except for the data of sequencing read depth(depth)=2,where FImpute had a slightly lower imputation accuracy than Beagle and *** was observed to be the best for all of the imputations at depth=4,5 and 10,but the worst for depth=*** genomic prediction,retaining more SnPs with no MAF limit resulted in higher *** the depth increased to 10,the prediction reliabilities approached those using true genotypes in the GBS *** and IMPUTE2 had the largest increases in prediction reliability of 5 percentage points,and FImpute gained 3 percentage points at depth=*** best prediction was observed at depth=4,5 and 10 using GcIM,but the worst prediction was also observed using GcIM at depth=***:The current study showed that imputation accuracies were relatively low for GBS with low depths and high for GBS with high *** resulted in larger gains in the reliability of genomic predictions for GBS with lowe

关键词： Genomic prediction Genotyping by sequencing Imputation MAF Simulation

Challenges and opportunities for nanomaterials in spectral splitting for high-performance hybrid solar photovoltaic-thermal applications:A review

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nano Materials Science 2020年第3期2卷 183-203页

作者： Gan Huang Sara Riera Curt Kai Wang Christos n.Markides Clean Energy Processes(CEP)Laboratory Department of Chemical EngineeringImperial College LondonSouth Kensington CampusLondon SW72AZUnited Kingdom Institute of Refrigeration and Cryogenics Zhejiang UniversityHangzhou310027China

Hybrid photovoltaic-thermal(PV-T)collectors,which are capable of cogenerating useful thermal energy and electricity from the same aperture area,have a significantly higher overall efficiency and ability to displace emissions compared to independent,separate photovoltaic panels,solar thermal collectors or combinations *** splitting has emerged as a promising route towards next-generation high-performance PV-T collectors,and nanotechnology plays an important role in meeting the optical and thermal requirements of advanced spectral splitting PV-T collector *** paper presents a comprehensive review of spectral splitting technologies based on nanomaterials for PV-T *** nanomaterials(nanofluids,nanofilms and nanowires)suitable for achieving spectral splitting based on reflection,diffraction,refraction and/or absorption approaches in PV-T collectors are presented,along with the associated challenges and opportunities of these design *** requirements from such materials in terms of optical properties,thermal properties,stability and cost are discussed with the aim of guiding future research and innovation,and developing this technology towards practical *** and nanofilms are currently the most common nanomaterials used for spectral splitting,with significant progress made in recent years in the development of these ***,there still remains a considerable gap between the optical properties of currently-available filters and the desired properties of ideal *** to instruct and guide the future development of filter materials,a simple generalized method is further proposed in this paper to identify optimal filters and efficiency limits of spectral splitting PV-T systems for different *** is found that the optimal filter of a spectral splitting PV-T system is highly sensitive to the value of thermal energy relative to that of electricity,which therefore depends strongly on

关键词： thermal splitting performance

Improvements in tribological and anticorrosion performance of porous Ti–6Al–4V via PEO coating

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Friction 2021年第5期9卷 1303-1318页

作者： C.Garcia-Cabezón M.L.Rodríguez-Méndez V.AmigóBorrás R.Bayón C.Salvo-Comino C.Garcia-Hernandez F.Martin-Pedrosa Materials Engineering E.I.I.Universidad de ValladolidValladolid 47011Spain BioecoUVA Research Institute Universidad de ValladolidValladolid 47011Spain Group UVASEnS Escuela de Ingenierías IndustrialesUniversidad de ValladolidValladolid 47011Spain Instituto de Tecnología de Materials Univesitat Politécnica de ValenciaValencia 46022Spain Tribology Unit Fundación IK4-TeknikerEibar 20600Spain

Medical implants manufactured using biomaterial Ti–6Al–4V exhibit some *** higher elastic modulus than that of natural bone can cause stress shielding *** can be avoided using Ti–6Al–4V with pores in the implant ***,poor corrosion and tribocorrosion behaviors are yielded because of the large area exposed to the *** mitigate both issues,coating technologies can be *** plasma electrolytic oxidation(PEO)process is a cost‐effective process that has been used successfully in nonporous Ti *** this study,two PEO coatings with different amounts of Ca/P are ***,reports regarding their application in porous materials are *** effects of PEO treatments on corrosion and tribocorrosion in Ti–6Al–4V powder metallurgy are analyzed *** porous materials provide an efficient surface for PEO coatings,as demonstrated via scanning electron microscopy(SEM)and atomic force microscopy(AFM),and the porosity of the substrates improved the adherence of the *** corrosion resistance measured via electrochemical impedance spectroscopy confirmed the beneficial effect of the coatings,particularly for long exposure *** lower roughness,small pore size,and more compact film observed in the PEO–Ca/P sample resulted in favorable tribological and corrosion properties.

关键词： Ti‐based alloys corrosion tribocorrosion surface modification

Cold plumes trigger contamination of oceanic mantle wedges with continental crust-derived sediments:Evidence from chromitite zircon grains of eastern Cuban ophiolites

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Geoscience Frontiers 2018年第6期9卷 1921-1936页

作者： j.A.Proenza j.M.González-jiménez A.Garcia-Casco E.Belousova W.L.Griffin C.Talavera Y.Rojas-Agramonte T.Aiglsperger D.navarro-Ciurana n.Pujol-Solà F.Gervilla S.Y.O’Reilly D.E.jacob Departament de Mineralogia Petrologia i Geologia AplicadaUniversitat de BarcelonaC/Martíi Franquès s/n08028BarcelonaSpain Departamento de Mineralogía y Petrología Universidad de GranadaFacultad de CienciasFuentenueva s/n 18002GranadaSpain Instituto Andaluz de Ciencias de la Tierra(CSIC-UGR) Avda.de las Palmeras 4E-18100ArmillaGranadaSpain ARC Centre of Excellence for Core to Crust Fluid Systems(CCFS) GEMOC National Key CentreDepartment of Earth and Planetary SciencesMacquarie UniversitySydneyNSW 2109Australia john de Laeter Centre Curtin UniversityPerthWA 6102Australia Geocycles-Earth System Research Center Institut fur GeowissenschaftenJohannes Gutenberg-UniversitatBecherweg 21D-55099 MainzGermany Departamento de Geociencias Universidad de los AndesBogotáColombia

The origin of zircon grains, and other exotic minerals of typical crustal origin, in mantle-hosted ophiolitic chromitites are hotly debated. We report a population of zircon grains with ages ranging from Cretaceous(99 Ma) to neoarchean(2750 Ma), separated from massive chromitite bodies hosted in the mantle section of the supra-subduction(SSZ)-type Mayari-Baracoa Ophiolitic Belt in eastern Cuba. Most analyzed zircon grains(n = 20, 287 ± 3 Ma to 2750 ± 60 Ma) are older than the early Cretaceous age of the ophiolite body, show negativeε_(Hf)(t)(-26 to-0.6) and occasional inclusions of quartz, K-feldspar,biotite, and apatite that indicate derivation from a granitic continental crust. In contrast, 5 mainly rounded zircon grains(297±5 Ma to 2126±27 Ma) show positive εHf(t)(+0.7 to +13.5) and occasional apatite inclusions, suggesting their possible crystallization from melts derived from juvenile(mantle)sources. Interestingly, younger zircon grains are mainly euhedral to subhedral crystals, whereas older zircon grains are predominantly rounded grains. A comparison of the ages and Hf isotopic compositions of the zircon grains with those of nearby exposed crustal terranes suggest that chromitite zircon grains are similar to those reported from terranes of Mexico and northern South America. Hence, chromitite zircon grains are interpreted as sedimentary-derived xenocrystic grains that were delivered into the mantle wedge beneath the Greater Antilles intra-oceanic volcanic arc by metasomatic fluids/melts during subduction processes. Thus, continental crust recycling by subduction could explain all populations of old xenocrystic zircon in Cretaceous mantle-hosted chromitites from eastern Cuba *** integrate the results of this study with petrological-thermomechanical modeling and existing geodynamic models to propose that ancient zircon xenocrysts, with a wide spectrum of ages and Hf isotopic compositions, can be transferred to the mantle wedge above subducting slabs by

关键词： Zircon U-Pb geochronology Chromitites Cold plumes Ophiolites Cuba

Examination of Relationship between Family Income and Parents School Choices in Tanzania——A Case of Dar es Salaam Region, Ilala District

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Examination of Relationship between Family Income and Parent...

作者： janeth n Mwanjejele（茉莉）华中师范大学

学位级别：硕士

The purpose of the research was to examine the relationship between family income and parents’school choice in Tanzania, a case of Dar es Salam Region, at Ilala District;the research was guided by the following research questions:What is the household income or level of Household Consumption per month to the Tanzanian families? What are the relationship between family income and parents’school choice? What are the factors influencing the performance of public, private and religion primary schools?The study adopted both quantitative and qualitative research approaches. These were used to make possible to gather more data and test research hypotheses and also were used in order to measure the ideas, opinions, beliefs, and experiences of respondents in connection to relationship between family income and parents’school choice in Tanzania. Rational choice theory was used as guidance of the study. Survey research technique, stratified sampling and purposive sampling were employed during the study. Data were collected by using questionnaires and interview guide questions and sample size of 130 was used during the study. Validity and reliability of the data were tested by KMO=67.3%, and Cronbach’s Alpha=95.4%. Data were analyzed by using SPSS version 20 and excel Microsoft application was used to edit *** study concludes that average house income have high impact on the school choices by parents as it was observed there is strong relationship explained by R=75%. These findings give a concluding remark that most of medium and high income parents’choices private or religion schools for their children although there are significance differences in perception between to their choices. The researcher also recommends that the average income of the household determine the school choices by parents. Families with medium and high income are like to choice the schools which meet standards in performance and also school choice by parents should be based on the key performance in

关键词：坦桑尼亚学校选择家庭收入父母关系关键绩效指标

Mapping Structurally Controlled Alterations Sparked by Hydrothermal Activity in the Fatira–Abu Zawal Area,Eastern Desert,Egypt

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Acta Geologica Sinica(English Edition) 2023年第2期97卷 662-680页

作者： Mohamed BADAWI Mahmoud ABDELATIF Ali SHEBL Farid MAKROUM Ahmed SHALABY norbert néMETH Institute of Exploration Geosciences University of MiskolcMiskolc 3515Hungary Department of Geology Mansoura UniversityMansoura 35516Egypt Department of Geology South Valley UniversityQena 83523Egypt Department of Mineralogy and Geology University of DebrecenDebrecen 4032Hungary Department of Geology Tanta UniversityTanta 31527Egypt

The Eastern Desert of Egypt suffered a protracted period of deformation triggered by cratonization of the new juvenile crust known as the Arabian nubian Shield(AnS),which has been proposed for potential gold discoveries associated with the corresponding tectonic *** Fatira area,on the border of Egypt’s northern and Central Eastern Deserts,is covered with metavolcanic rocks twisted by a dextral relocation of the Fatira Shear Zone(FSZ)relative to the Barud magmatic *** recent study evaluated many deformed post-orogenic granitic intrusions and felsite dikes associated with promising mineralization localities,notably orogenic gold *** combination of various field observations and remote sensing data,followed by the analysis of aeromagnetic enhanced maps,allowed the differentiation of distinct lithologies,structural features,and hydrothermal alterations in the study ***,the integrated results obtained from the different interpretation techniques are utilized to identify and confirm the previously supposed mineralized localities in the Fatira and Abu Zawal areas and predict other matched *** final ASTER,Sentinel 2 hydrothermal alteration,and orientation entropy heat maps demonstrate the association between these mineralized regions and major structures related to the FSZ late stage of deformation rather than other structures studied throughout the area of interest.

关键词： gold granite island arc association Pan-African Orogeny Egypt

Gate-Dependent nonlinear Hall Effect at Room Temperature in Topological Semimetal GeTe

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中国物理快报:英文版 2023年第7期40卷 63-67页

作者： n.n.Orlova A.V.Timonina n.n.Kolesnikov E.V.Deviatov Institute of Solid State Physics of the Russian Academy of Sciences ChernogolovkaMoscow District2 Academician Ossipyan str.142432Russia

We experimentally investigate nonlinear Hall effect as zero-frequency and second-harmonic transverse voltage responses to ac electric current for topological semimetal GeTe.A thick single-crystal GeTe flake is placed on the Si/SiO_(2) substrate,where the p-doped Si layer serves as a gate *** confirm that electron concentration is not gate-sensitive in thick GeTe flakes due to the gate field screening by bulk *** contrast,by transverse voltage measurements,we demonstrate that the nonlinear Hall effect shows pronounced dependence on the gate electric field at room *** the nonlinear Hall effect is a direct consequence of a Berry curvature dipole in topological media,our observations indicate that Berry curvature can be controlled by the gate electric *** experimental observation can be understood as a result of the known dependence of giant Rashba splitting on the external electric field in *** possible applications,the zero-frequency gate-controlled nonlinear Hall effect can be used for the efficient broad-band rectification.

关键词： temperature. field. curvature

Transient vibration of thin viscoelastic orthotropic plates

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Acta Mechanica Sinica 2011年第1期27卷 98-107页

作者： j.Soukup F.Vale j.Volek j.Skoilas jan Evangelista Purkyně University in ústí nad Labem Faculty of Production Technology and Management Department of Machinery and Mechanics Centre of Material Diagnostics Institute of Thermomechanics AS CR v.v.i Academy of Sciences Czech Republic

This article deals with solutions of transient vibration of a rectangular viscoelastic orthotropic thin 2D plate for particular deformation models according to Flu¨gge and *** linear model,a general standard viscoelastic body,of the rheologic properties of a viscoelastic material was *** time and coordinate curves of the basic quantities displacement,rotation,velocity,stress and deformation are *** results obtained by an approximate analytic method are compared with numerical results for 3D plate generated by FEM application and with experimental investigation.

关键词： Transient vibration thin plate Orthotropic General viscoelastic standard solid.

MXene-based nanomaterials as adsorbents for wastewater treatment:a review on recent trends

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Frontiers of Materials Science 2022年第1期16卷 55-70页

作者： Rajesh K.jEnA Himadri Tanaya DAS Braja n.PATRA nigamananda DAS Centre of Excellence in Advanced Materials and Applications Utkal UniversityVani ViharBhubaneswar 751004India Department of Chemistry Utkal UniversityVani ViharBhubaneswar 751004India

The wastewater treatment is a challenging research area to reduce the increasing pressure on limited fresh water *** several techniques adopted and practiced,adsorption is one of the most effective and sustainable ecofriendly *** recent years,MXene nanomaterials,a new family of transition metal carbides,have gained increasing attention as the potential adsorbent for pollutants due to their unique features such as large surface area with abundant active sites and hydrophilicity.A wide range of pollutants *** metal ions,organic dyes,radionuclides,and toxic gas molecules have been sensed by 2D *** inclusive understanding on the adsorptive behavior of MXene-based materials is needed to explain the removal mechanism and effects of different adsorption *** review gives a general overview on recent research progress on MXene materials with special reference to their applications for the adsorptive removal of different *** general trends in the synthesis of MXenes,their stability and different factors affecting the adsorption process along with the main challenges in understanding the full potential of MXenes for environmental applications are discussed.

关键词： MXene adsorption wastewater treatment heavy metal radionuclide